:root {
  --navy: #132b3a;
  --navy-2: #1b3a4b;
  --teal: #278f86;
  --teal-soft: #dff3ef;
  --mango: #ffc45e;
  --mango-soft: #fff1cb;
  --coral: #e96857;
  --cream: #f7f3e9;
  --paper: #fffefa;
  --white: #ffffff;
  --ink-muted: #65757c;
  --line: #dbe2df;
  --line-dark: rgba(19, 43, 58, 0.14);
  --shadow-sm: 0 1px 2px rgba(19, 43, 58, 0.05), 0 8px 24px rgba(19, 43, 58, 0.05);
  --shadow-md: 0 2px 4px rgba(19, 43, 58, 0.05), 0 18px 48px rgba(19, 43, 58, 0.08);
  --font-sans: "Avenir Next", Avenir, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-math: Georgia, "Times New Roman", serif;
  --deep-accent: #216f70;
  --deep-support: #edf6f4;
}

/* Deep understanding: readable lessons, working margins and a pocket reference. */
.quad-section-nav { display:flex; flex-wrap:wrap; gap:8px; margin:16px auto; padding:0 16px; max-width:1400px; }
.quad-section-nav a { display:inline-flex; align-items:center; min-height:44px; padding:9px 14px; border:1px solid var(--line); border-radius:10px; background:white; color:var(--navy); font-size:14px; font-weight:700; text-decoration:none; }
.quad-section-nav a[aria-current="page"] { color:white; background:var(--deep-accent); border-color:var(--deep-accent); }
.deep-page { max-width:1500px; margin:auto; padding:0 clamp(14px,3vw,42px) 48px; color:var(--navy); font-family:var(--font-sans); font-size:16px; line-height:1.65; }
.deep-page button,.deep-page input,.deep-page select { font:inherit; }
.deep-page button,.deep-page a,.deep-sheet button,.deep-sheet a { touch-action:manipulation; }
.deep-page button { cursor:pointer; }
.deep-page button:disabled { cursor:default; opacity:.62; }
.deep-page :focus-visible,.deep-sheet :focus-visible { outline:3px solid #c68826; outline-offset:4px; }
.deep-page .quad-section-nav { padding:0; }
.deep-topbar { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:12px; min-height:76px; border-bottom:1px solid var(--line); font-size:14px; }
.deep-topbar > span:nth-child(2) { font-weight:750; }
.deep-home { display:flex; align-items:center; gap:8px; color:var(--navy); text-decoration:none; }
.deep-sync { font-size:14px; color:var(--deep-accent); }
.deep-sync.pending { color:#8b500d; }
.deep-intro { display:flex; justify-content:space-between; align-items:center; gap:24px; padding:20px 0 28px; }
.deep-intro h1 { font-family:var(--font-math); font-size:clamp(28px,3.3vw,42px); line-height:1.15; margin:8px 0 12px; letter-spacing:-.6px; }
.deep-intro p { margin:0; max-width:630px; }
.deep-kicker { color:var(--deep-accent); font-size:14px; font-weight:750; margin:0 0 8px; }
.deep-actions { display:flex; flex-wrap:wrap; align-items:center; gap:10px; }
.deep-intro .deep-actions { flex-direction:column; align-items:stretch; flex:0 0 auto; }
.deep-button { display:inline-flex; align-items:center; justify-content:center; gap:9px; min-height:46px; padding:10px 16px; border:1px solid var(--deep-accent); border-radius:10px; background:var(--deep-accent); color:white; font-size:16px; font-weight:700; line-height:1.4; text-decoration:none; }
.deep-button.secondary { background:white; color:var(--navy); border-color:#b9ccca; }
.deep-layout { display:grid; grid-template-columns:275px minmax(0,1fr); align-items:start; gap:28px; }
.deep-rail { position:sticky; top:14px; max-height:calc(100vh - 28px); overflow-y:auto; scrollbar-width:thin; }
.deep-progress { background:var(--deep-support); border-radius:12px; padding:16px; display:grid; gap:9px; }
.deep-progress progress { display:block; width:100%; height:10px; appearance:none; border:none; border-radius:10px; overflow:hidden; background:#ccdfda; accent-color:var(--deep-accent); }
.deep-progress progress::-webkit-progress-bar { background:#ccdfda; }
.deep-progress progress::-webkit-progress-value { background:var(--deep-accent); }
.deep-progress small { font-size:13px; }
.deep-desktop-menu h2 { display:flex; align-items:center; gap:10px; font-size:15px; margin:24px 8px 8px; }
.deep-desktop-menu h2 > span { display:grid; place-items:center; width:26px; height:26px; background:#e8eef2; border-radius:50%; }
.deep-desktop-menu button { display:flex; align-items:center; gap:9px; width:100%; padding:11px 10px; border:1px solid transparent; border-radius:9px; background:none; color:var(--navy); text-align:left; font-size:14px; line-height:1.4; }
.deep-desktop-menu button > span:first-child { color:var(--deep-accent); font-size:13px; min-width:26px; }
.deep-desktop-menu button > svg { flex-shrink:0; margin-left:auto; color:var(--deep-accent); }
.deep-desktop-menu button[aria-current="step"] { border-color:#b2d1c9; background:var(--deep-support); font-weight:750; }
.deep-mobile-menu { display:none; }
.deep-stage { min-width:0; }
.deep-lesson-title { border-left:4px solid var(--deep-accent); padding:0 0 0 22px; margin:0 0 22px; }
.deep-lesson-title h2 { margin:0 0 9px; font-family:var(--font-math); font-size:clamp(25px,2.4vw,34px); line-height:1.2; }
.deep-lesson-title p:last-child { margin:0; }
.deep-tabs [data-slot="tabs-list"] { display:flex; width:100%; height:auto; padding:5px; margin:0 0 16px; border:1px solid var(--line); border-radius:12px; background:#eef2f1; }
.deep-tabs [data-slot="tabs-trigger"] { flex:1; border:0; border-radius:8px; background:transparent; white-space:normal; min-height:48px; padding:10px; color:#425b64; font-size:14px; font-weight:750; }
.deep-tabs [data-slot="tabs-trigger"][data-active] { background:white; color:var(--deep-accent); box-shadow:var(--shadow-sm); }
.deep-tabs [data-slot="tabs-content"] { font-size:16px; line-height:1.7; }
.deep-card,.deep-visual { background:white; border:1px solid var(--line); border-radius:16px; padding:clamp(18px,3vw,28px); margin:0 0 18px; box-shadow:0 2px 8px #132b3a04; }
.deep-card h3,.deep-visual strong { font-size:20px; line-height:1.35; }
.deep-card h3 { margin:0 0 14px; }
.deep-card p { margin:10px 0; }
.deep-vocabulary { background:#f5f9f8; }
.deep-vocabulary dl { margin:0; display:grid; gap:14px; }
.deep-vocabulary dl > div { display:grid; grid-template-columns:minmax(100px,1fr) 3fr; gap:16px; }
.deep-vocabulary dt { color:var(--deep-accent); font-weight:750; }
.deep-vocabulary dd { margin:0; }
.deep-idea-number { display:grid; place-items:center; float:right; width:32px; height:32px; background:var(--deep-support); border-radius:50%; color:var(--deep-accent); font-weight:800; }
.deep-equation { font-family:var(--font-math); font-size:clamp(20px,2.2vw,26px); line-height:1.8; background:#f4f7f7; padding:14px 16px; border-radius:10px; margin:14px 0; overflow-wrap:anywhere; }
.deep-equation sup { font-size:.7em; line-height:0; }
.deep-mistake { border-left:4px solid #c88724; background:#fffcf4; }
.deep-mistake .deep-equation { background:#fff1d4; }
.deep-panel-intro { margin:0 0 20px; }
.deep-worked ol { padding:0; margin:16px 0; list-style:none; }
.deep-worked li { display:grid; grid-template-columns:30px minmax(0,1fr); gap:13px; padding:18px 0; border-top:1px solid var(--line); }
.deep-worked-number { display:grid; place-items:center; width:30px; height:30px; border-radius:50%; background:var(--deep-accent); color:white; font-size:14px; }
.deep-worked .deep-equation { margin-top:0; }
.deep-why { background:var(--deep-support); padding:14px 16px; border-radius:10px; }
.deep-answer,.deep-complete { background:#e5f4ef; border-radius:12px; padding:18px; color:#175a55; }
.deep-answer p { font-family:var(--font-math); font-size:23px; }
.deep-choices { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.deep-choices button { display:flex; align-items:flex-start; gap:12px; padding:15px; border:1px solid #bccdca; border-radius:12px; color:var(--navy); background:white; text-align:left; line-height:1.5; min-height:56px; overflow-wrap:anywhere; }
.deep-choices button > span:first-child { border-radius:5px; background:#eef2f2; padding:1px 6px; font-size:14px; font-weight:800; }
.deep-choices button.correct { background:#e0f4eb; border-color:#2b8a74; opacity:1; }
.deep-choices button.incorrect { background:#fff5e8; border-color:#c58c3f; opacity:1; }
.deep-feedback { margin-top:16px; border-radius:12px; padding:16px; }
.deep-feedback.correct { background:#e8f5ef; }
.deep-feedback.incorrect { background:#fff7e9; }
.deep-hints { margin-top:14px; }
.deep-hints > p { display:flex; align-items:flex-start; gap:9px; padding:12px; background:#f4f7f7; border-radius:9px; }
.deep-hints svg { flex-shrink:0; margin-top:5px; }
.deep-complete { display:flex; gap:14px; align-items:center; margin-bottom:16px; }
.deep-complete svg { flex-shrink:0; }
.deep-complete p { margin:0; }
.deep-recap li { margin-bottom:9px; }
.deep-footer { border-top:1px solid var(--line); margin-top:28px; padding:20px 0; font-size:14px; color:#52656e; }
.deep-footer a { display:inline-block; margin:0 20px 8px 0; color:var(--deep-accent); font-weight:700; }
.deep-warning { padding:14px; border:1px solid #d7b57a; border-radius:10px; background:#fff7e8; }
.deep-visual figcaption p { margin:10px 0 16px; }
.deep-visual svg,.deep-sheet svg { display:block; width:100%; height:auto; max-width:600px; margin:auto; }
.deep-visual svg text,.deep-sheet svg text { font-family:var(--font-sans); fill:var(--navy); font-size:16px; }
.deep-visual svg text.deep-svg-math { font-family:var(--font-math); font-size:25px; }
.deep-visual svg line,.deep-visual svg path { vector-effect:non-scaling-stroke; }
.deep-svg-wrap { overflow-x:auto; }
.deep-svg-wrap svg { min-width:330px; }
.deep-presets { display:flex; flex-wrap:wrap; gap:8px; margin:12px 0; }
.deep-presets button,.deep-plot-table button { min-height:44px; background:#eef5f3; border:1px solid #bdcfca; padding:8px 12px; border-radius:8px; color:var(--navy); font-size:14px; }
.deep-graph-controls { display:grid; grid-template-columns:repeat(3,1fr); gap:12px; }
.deep-graph-controls label { display:grid; gap:4px; font-weight:700; }
.deep-graph-controls input,.deep-plot-table input { width:100%; min-height:44px; padding:8px 12px; border:1px solid #afc4bd; border-radius:8px; background:white; color:var(--navy); font-size:16px; }
.deep-small { font-size:14px; color:#52656e; }
.deep-plot-table table { width:100%; border-collapse:collapse; }
.deep-plot-table caption { text-align:left; font-size:14px; margin:10px 0; }
.deep-plot-table td,.deep-plot-table th { text-align:left; padding:8px; border-bottom:1px solid var(--line); }
.deep-plot-table input { max-width:150px; }
.deep-sheet[data-slot="sheet-content"] { position:fixed; inset:0 0 0 auto; z-index:100; display:flex; flex-direction:column; overflow:hidden; width:min(100vw,620px); max-width:none; box-shadow:-12px 0 60px #132b3a30; background:white; color:var(--navy); font-family:var(--font-sans); font-size:16px; line-height:1.6; }
body:has(.deep-sheet) [data-slot="sheet-overlay"] { position:fixed; inset:0; z-index:99; background:#132b3a65; }
.deep-sheet > button { position:absolute; top:14px; right:14px; display:grid; place-items:center; width:38px; height:38px; background:white; border:1px solid var(--line); border-radius:8px; color:var(--navy); cursor:pointer; }
.deep-sheet > button svg { width:20px; height:20px; }
.deep-sheet .sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.deep-sheet [data-slot="sheet-header"] { padding:24px 52px 12px 24px; }
.deep-sheet [data-slot="sheet-title"] { font-size:24px; font-family:var(--font-math); color:var(--navy); }
.deep-sheet [data-slot="sheet-description"] { font-size:14px; color:#52656e; }
.deep-sheet-body { overflow-y:auto; padding:0 24px 32px; }
.deep-sheet-body h3 { font-size:19px; margin-top:24px; }
.deep-sheet-body details { border-bottom:1px solid var(--line); padding:12px 0; }
.deep-sheet-body summary { cursor:pointer; font-family:var(--font-math); font-size:21px; overflow-wrap:anywhere; }
.deep-sheet-body p { font-size:16px; }
.teacher-deep-summary { margin:18px 0; padding:20px; border:1px solid var(--line); border-radius:14px; background:#f3f9f7; }
.teacher-deep-summary h3 { margin:0 0 8px; font-size:20px; }
.teacher-deep-summary p { font-size:16px; }
.teacher-deep-summary a { display:inline-block; margin-right:18px; font-size:16px; color:var(--deep-accent); }
@media(max-width:1050px) {
  .deep-layout { grid-template-columns:230px minmax(0,1fr); gap:18px; }
  .deep-intro { align-items:flex-start; flex-direction:column; }
  .deep-intro .deep-actions { flex-direction:row; }
}
@media(max-width:760px) {
  .deep-layout { display:block; }
  .deep-rail { position:static; max-height:none; overflow:visible; margin-bottom:24px; }
  .deep-desktop-menu { display:none; }
  .deep-mobile-menu { display:grid; gap:8px; margin-top:14px; }
  .deep-mobile-menu [data-slot="native-select-wrapper"] { position:relative; width:100%; }
  .deep-mobile-menu [data-slot="native-select-icon"] { position:absolute; right:12px; top:50%; transform:translateY(-50%); width:18px; height:18px; pointer-events:none; }
  .deep-mobile-menu select { appearance:none; width:100%; height:auto; min-height:48px; padding:10px 38px 10px 12px; border:1px solid #b9ccca; border-radius:10px; background:white; font-size:16px; }
  .deep-topbar > span:nth-child(2) { display:none; }
  .deep-vocabulary dl > div { grid-template-columns:1fr; gap:3px; }
  .deep-choices { grid-template-columns:1fr; }
  .deep-tabs [data-slot="tabs-trigger"] { padding:9px 5px; font-size:14px; }
  .deep-equation { padding:12px; font-size:21px; }
  .deep-worked li { grid-template-columns:25px minmax(0,1fr); gap:8px; }
  .deep-lesson-title { padding-left:15px; }
}

/* Crisp, exam-style diagrams shared by teaching, practice and timed papers. */
.exam-diagram-card {
  width: min(100%, 680px);
  margin: 18px auto;
  overflow: hidden;
  border: 1px solid #ccd8d5;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 8px 26px rgba(19, 43, 58, 0.06);
}
.exam-diagram-svg { display: block; width: 100%; height: auto; min-height: 210px; }
.exam-diagram-svg.compact { min-height: 175px; }
.exam-diagram-svg text { fill: #173342; font-family: var(--font-sans); font-size: 15px; font-weight: 750; }
.exam-diagram-svg .exam-shape,
.exam-diagram-svg .exam-dimension line,
.exam-diagram-svg .exam-right-angle,
.exam-diagram-svg .exam-callout,
.exam-diagram-svg .exam-axis,
.exam-diagram-svg .exam-threshold,
.exam-diagram-svg .exam-wire {
  stroke: #173342;
  stroke-width: 2.4;
  vector-effect: non-scaling-stroke;
}
.exam-diagram-svg .exam-shape { fill: none; }
.exam-diagram-svg .exam-unshaded { fill: #fff; }
.exam-diagram-svg .exam-right-angle { fill: none; stroke-width: 2; }
.exam-diagram-svg .exam-dimension line { stroke-width: 1.6; }
.exam-diagram-svg .exam-dimension text,
.exam-diagram-svg .exam-side-label { font-family: var(--font-math); font-size: 16px; font-weight: 700; }
.exam-diagram-svg .exam-centre-label { font-size: 17px; font-weight: 850; }
.exam-diagram-svg .exam-area-label,
.exam-diagram-svg .exam-comparison-label { fill: #176d65; font-size: 15px; font-weight: 850; }
.exam-diagram-svg .exam-callout { stroke-width: 1.6; }
.exam-diagram-svg .exam-callout-label,
.exam-diagram-svg .exam-equation-label { font-family: var(--font-math); font-size: 15px; font-weight: 800; }
.exam-diagram-svg .exam-wire { fill: none; stroke: #9b6411; }
.exam-diagram-svg .exam-not-scale { fill: #7b878c; font-size: 10px; font-style: italic; font-weight: 600; }
.exam-diagram-svg .exam-key text,
.exam-diagram-svg .exam-domain-label { fill: #52646b; font-size: 11px; font-weight: 700; }
.exam-diagram-svg .exam-key rect { stroke: #4d8881; stroke-width: 1; vector-effect: non-scaling-stroke; }
.exam-diagram-svg .exam-axis { stroke-width: 1.8; }
.exam-diagram-svg .exam-tunnel-fill { fill: #f5efe0; stroke: none; }
.exam-diagram-svg .tunnel-curve { fill: none; stroke-width: 3; }
.exam-diagram-svg .exam-threshold { stroke: #a25d12; stroke-dasharray: 7 6; stroke-width: 2; }
.exam-diagram-svg .exam-threshold-shade { stroke: #4d8881; stroke-width: 1.5; vector-effect: non-scaling-stroke; }
.exam-diagram-svg .exam-threshold-point { fill: #a25d12; stroke: #fff; stroke-width: 1.5; vector-effect: non-scaling-stroke; }
.exam-diagram-svg .exam-threshold-label { fill: #8b500d; font-size: 13px; }
.exam-diagram-svg .exam-axis-label { font-family: var(--font-math); font-size: 17px; font-style: italic; }
.exam-diagram-svg .exam-axis-number { font-family: var(--font-math); font-size: 12px; }

.working-levels-card,
.teacher-deadline-manager,
.teacher-note-manager,
.teacher-working-levels,
.teacher-course-map {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-sm);
}
.working-levels-card { padding: 17px; }
.working-levels-home { margin-top: 18px; padding: clamp(17px, 2.5vw, 24px); }
.working-levels-heading { display: grid; gap: 3px; padding-bottom: 11px; border-bottom: 1px solid var(--line); }
.working-levels-heading span { font-size: 10px; font-weight: 900; }
.working-levels-heading h2 { margin: 0; font-family: var(--font-math); font-size: clamp(20px, 2.4vw, 28px); }
.working-levels-heading small { color: var(--ink-muted); font-size: 10px; }
.working-level-list { display: grid; gap: 10px; margin: 14px 0; }
.working-levels-home .working-level-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.working-level-list article { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 11px; align-items: center; padding: 13px; border: 1px solid var(--line); border-radius: 13px; background: #fff; }
.working-grade,
.teacher-grade { display: grid; place-items: center; border-radius: 12px; background: #e8f4f1; color: #176d65; font-family: var(--font-math); font-size: 20px; font-weight: 900; }
.working-grade { width: 48px; height: 48px; }
.working-grade.finding,
.teacher-grade.finding { background: #f0eef9; color: #675c94; }
.working-level-copy { display: grid; gap: 5px; min-width: 0; }
.working-level-title-row,
.teacher-working-title { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.working-level-title-row b,
.teacher-working-title b { color: var(--teal); font-family: var(--font-math); font-size: 12px; }
.working-level-list strong { font-size: 12px; }
.working-level-list span { color: var(--ink-muted); font-size: 9px; line-height: 1.35; }
.working-level-list small { color: #176d65; font-size: 9px; font-weight: 800; }
.working-level-track,
.teacher-working-track { overflow: hidden; width: 100%; height: 8px; border: 0; border-radius: 999px; appearance: none; background: #e6ecea; color: var(--teal); }
.working-level-track::-webkit-progress-bar,
.teacher-working-track::-webkit-progress-bar { border-radius: inherit; background: #e6ecea; }
.working-level-track::-webkit-progress-value,
.teacher-working-track::-webkit-progress-value { border-radius: inherit; background: linear-gradient(90deg, var(--teal), #53b8aa); transition: width 280ms ease; }
.working-level-track::-moz-progress-bar,
.teacher-working-track::-moz-progress-bar { border-radius: inherit; background: linear-gradient(90deg, var(--teal), #53b8aa); }
.working-level-track.finding,
.teacher-working-track.finding { border: 1px dashed #c8c1df; background: #f5f3fb; }
.working-level-track.finding::-webkit-progress-bar,
.teacher-working-track.finding::-webkit-progress-bar { background: #f5f3fb; }
.working-levels-card > p,
.working-level-loading { margin: 0; color: var(--ink-muted); font-size: 10px; line-height: 1.55; }

.teacher-deadline-manager,
.teacher-note-manager,
.teacher-working-levels,
.teacher-course-map { margin-bottom: 16px; padding: clamp(16px, 2vw, 22px); }
.teacher-deadline-manager.overdue { border-color: rgba(233, 104, 87, .5); background: #fff9f6; }
.teacher-deadline-manager.closed { border-style: dashed; background: #f7f8f6; }
.teacher-setting-heading { display: flex; align-items: flex-start; gap: 11px; }
.teacher-setting-heading > svg { flex: 0 0 auto; margin-top: 3px; color: var(--teal); }
.teacher-setting-heading > div { display: grid; gap: 3px; }
.teacher-setting-heading h2 { margin: 0; font-size: 17px; }
.teacher-setting-heading p { margin: 0; color: var(--ink-muted); font-size: 10px; }
.teacher-setting-actions,
.deadline-editor-actions,
.deadline-close-confirm > div,
.teacher-note-footer { display: flex; align-items: center; gap: 8px; margin-top: 14px; }
.teacher-setting-actions button,
.deadline-editor-actions button,
.deadline-close-confirm button,
.teacher-note-footer button {
  min-height: 42px; padding: 9px 13px; border: 0; border-radius: 11px; background: var(--navy); color: white; cursor: pointer; font-size: 10px; font-weight: 850;
}
.teacher-setting-actions button.secondary,
.deadline-editor-actions button.secondary,
.deadline-close-confirm button.secondary { border: 1px solid var(--line); background: white; color: var(--navy); }
.deadline-editor { display: grid; grid-template-columns: 1.5fr 1fr; gap: 12px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line); }
.deadline-editor label { display: grid; gap: 5px; }
.deadline-editor label > span,
.deadline-editor legend { color: var(--ink-muted); font-size: 9px; font-weight: 800; }
.deadline-editor input,
.teacher-note-manager textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #cbd6d3; border-radius: 10px; background: white; color: var(--navy); font-size: 16px; }
.deadline-editor .wide,
.deadline-editor fieldset,
.deadline-editor-actions { grid-column: 1 / -1; }
.deadline-editor fieldset { display: flex; flex-wrap: wrap; gap: 8px 16px; margin: 0; padding: 10px 12px; border: 1px solid var(--line); border-radius: 11px; }
.deadline-editor fieldset label { display: flex; align-items: center; gap: 7px; min-height: 32px; cursor: pointer; }
.deadline-editor fieldset input { width: 18px; min-height: 18px; accent-color: var(--teal); }
.deadline-close-confirm { margin-top: 14px; padding: 13px; border: 1px solid #e5b3a9; border-radius: 12px; background: #fff4f0; }
.deadline-close-confirm p { margin: 4px 0 0; color: #76564f; font-size: 10px; }
.teacher-setting-error { margin: 10px 0 0; color: #aa3f32; font-size: 10px; font-weight: 750; }
.teacher-note-manager textarea { min-height: 96px; margin-top: 14px; resize: vertical; line-height: 1.5; }
.teacher-note-footer { justify-content: space-between; }
.teacher-note-footer small { color: var(--ink-muted); font-size: 9px; }
.teacher-note-footer button:disabled { opacity: .5; cursor: default; }

.teacher-working-levels > div:last-child { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 14px; }
.teacher-working-levels article { display: grid; grid-template-columns: 48px 1fr; gap: 10px; padding: 13px; border: 1px solid var(--line); border-radius: 13px; background: #fff; }
.teacher-grade { width: 48px; height: 48px; }
.teacher-working-levels article > div { display: grid; gap: 3px; min-width: 0; }
.teacher-working-levels article strong { font-size: 11px; }
.teacher-working-levels article small,
.teacher-working-levels article p,
.teacher-working-levels article em { margin: 0; color: var(--ink-muted); font-size: 9px; font-style: normal; }
.teacher-working-levels article p { color: #176d65; font-weight: 800; }
.teacher-working-levels article em { grid-column: 1 / -1; padding-top: 7px; border-top: 1px solid var(--line); }
.teacher-working-track { height: 7px; margin: 4px 0 2px; }

.teacher-course-map > details { overflow: hidden; margin-top: 10px; border: 1px solid var(--line); border-radius: 13px; background: #fff; }
.teacher-course-map summary { display: flex; align-items: center; gap: 10px; min-height: 52px; padding: 11px 13px; cursor: pointer; list-style: none; }
.teacher-course-map summary::-webkit-details-marker { display: none; }
.teacher-course-map > details > summary > span { display: grid; width: 34px; height: 34px; place-items: center; border-radius: 10px; background: var(--teal-soft); color: #176d65; font-size: 9px; font-weight: 900; }
.teacher-course-map summary > div { display: grid; gap: 2px; }
.teacher-course-map summary strong { font-size: 11px; }
.teacher-course-map summary small,
.teacher-course-map summary > span:last-child { color: var(--ink-muted); font-size: 9px; }
.teacher-map-body { display: grid; gap: 8px; padding: 0 10px 10px 55px; }
.teacher-map-body details { border: 1px solid #e4e9e7; border-radius: 11px; }
.teacher-map-body details > div { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 7px; padding: 0 10px 10px; }
.teacher-map-body a,
.teacher-map-test { min-height: 42px; padding: 9px 11px; border-radius: 9px; background: #f5f8f7; color: var(--navy); font-size: 9px; font-weight: 800; text-decoration: none; }
.teacher-map-test { display: flex; align-items: center; gap: 7px; margin-top: 10px; background: var(--navy); color: white; }

@media (max-width: 620px) {
  .exam-diagram-card { margin: 14px 0; border-radius: 12px; }
  .exam-diagram-svg { min-height: 180px; }
  .exam-diagram-svg text { font-size: 16px; }
  .exam-diagram-svg .exam-key text,
  .exam-diagram-svg .exam-domain-label,
  .exam-diagram-svg .exam-not-scale { font-size: 12px; }
  .deadline-editor { grid-template-columns: 1fr; }
  .deadline-editor label,
  .deadline-editor fieldset,
  .deadline-editor-actions { grid-column: 1; }
  .teacher-setting-actions,
  .deadline-editor-actions,
  .deadline-close-confirm > div,
  .teacher-note-footer { align-items: stretch; flex-direction: column; }
  .teacher-setting-actions button,
  .deadline-editor-actions button,
  .deadline-close-confirm button,
  .teacher-note-footer button { width: 100%; }
  .teacher-working-levels > div:last-child { grid-template-columns: 1fr; }
  .teacher-map-body { padding-left: 10px; }
  .teacher-map-body details > div { grid-template-columns: 1fr; }
}

/* 2026 course-map, fair-feedback, and admin-preview additions */
.admin-preview-bar {
  position: sticky;
  z-index: 25;
  top: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(1180px, calc(100% - 32px));
  margin: 12px auto 0;
  padding: 11px 13px;
  border: 1px solid rgba(98, 89, 201, 0.35);
  border-radius: 14px;
  background: rgba(240, 239, 255, 0.97);
  box-shadow: 0 8px 24px rgba(48, 42, 120, 0.1);
  color: #302a78;
  backdrop-filter: blur(14px);
}

.admin-preview-bar-copy,
.admin-preview-bar-copy > div,
.admin-preview-bar nav,
.admin-preview-bar a {
  display: flex;
  align-items: center;
}

.admin-preview-bar-copy { gap: 9px; }
.admin-preview-bar-copy > div { align-items: flex-start; flex-direction: column; }
.admin-preview-bar-copy strong { font-size: 12px; }
.admin-preview-bar-copy span { font-size: 10px; }
.admin-preview-bar nav { gap: 7px; }
.admin-preview-bar a {
  gap: 6px;
  min-height: 35px;
  padding: 8px 10px;
  border: 1px solid rgba(48, 42, 120, 0.2);
  border-radius: 9px;
  background: white;
  color: inherit;
  font-size: 10px;
  font-weight: 850;
  text-decoration: none;
}
.admin-preview-bar .admin-exit-preview { background: #302a78; color: white; }

.progressive-help {
  display: grid;
  gap: 10px;
  margin-top: 14px;
  padding: 14px;
  border: 1px solid #e9ce86;
  border-radius: 14px;
  background: #fffbef;
}
.progressive-help-heading { display: flex; align-items: flex-start; gap: 9px; color: #98600e; }
.progressive-help-heading > div { display: grid; gap: 2px; }
.progressive-help-heading span { font-size: 9px; font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
.progressive-help-heading strong { color: var(--navy); font-size: 12px; }
.progressive-help p { margin: 0; color: #4f5e64; font-size: 12px; line-height: 1.55; }
.progressive-help ol { display: grid; gap: 7px; margin: 0; padding-left: 22px; color: #4f5e64; font-size: 11px; line-height: 1.5; }
.progressive-help button {
  justify-self: start;
  padding: 8px 10px;
  border: 1px solid #d8b668;
  border-radius: 9px;
  background: white;
  color: #7a4b08;
  cursor: pointer;
  font-size: 10px;
  font-weight: 850;
}
.grade-message { color: var(--ink-muted); font-size: 12px; }

.curriculum-tree { display: grid; gap: 11px; margin-top: 17px; }
.book-band {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--navy);
  color: white;
}
.book-band > span { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 12px; background: var(--mango); color: var(--navy); font-family: var(--font-math); font-size: 18px; font-weight: 900; }
.book-band > div { display: grid; gap: 2px; }
.book-band strong { font-size: 13px; }
.book-band small { color: rgba(255,255,255,.7); font-size: 9px; }
.chapter-folder,
.topic-folder {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(255,255,255,.78);
}
.chapter-folder > summary,
.topic-folder > summary {
  display: grid;
  grid-template-columns: auto minmax(0,1fr) auto;
  align-items: center;
  gap: 11px;
  padding: 14px;
  cursor: pointer;
  list-style: none;
}
.chapter-folder > summary::-webkit-details-marker,
.topic-folder > summary::-webkit-details-marker { display: none; }
.chapter-folder > summary::after,
.topic-folder > summary::after { content: '⌄'; grid-column: 4; color: var(--ink-muted); font-size: 16px; transition: transform 160ms ease; }
.chapter-folder:not([open]) > summary::after,
.topic-folder:not([open]) > summary::after { transform: rotate(-90deg); }
.chapter-folder > summary > div,
.topic-folder > summary > div { display: grid; gap: 3px; }
.chapter-folder > summary strong { font-size: 13px; }
.topic-folder > summary strong { font-size: 12px; }
.chapter-folder > summary small,
.topic-folder > summary small { color: var(--ink-muted); font-size: 9px; }
.chapter-number,
.path-order { display: grid; place-items: center; flex: 0 0 auto; font-weight: 900; }
.chapter-number { width: 38px; height: 38px; border-radius: 12px; background: #edf5f3; color: var(--teal); font-size: 10px; }
.chapter-folder-body { display: grid; gap: 9px; padding: 0 10px 10px 58px; }
.topic-folder { border-radius: 13px; background: white; }
.topic-folder > summary { padding: 11px; }
.topic-folder > summary .topic-icon { width: 34px; height: 34px; }
.folder-score,
.new-topic-pill { padding: 5px 8px; border-radius: 999px; background: var(--teal-soft); color: #176d65; font-size: 9px; font-weight: 900; }
.new-topic-pill { background: var(--mango-soft); color: #9a5c05; }
.folder-path-list { gap: 6px; margin: 0; padding: 0 9px 9px 54px; }
.folder-path-list .topic-row { min-height: 57px; padding: 8px 10px; border-radius: 11px; }
.path-order { width: 28px; height: 28px; border-radius: 9px; background: #eff3f1; color: var(--teal); font-size: 9px; }
.locked-chapter { opacity: .7; background: #f1f2f0; }
.final-assessment-row,
.mistake-fixer-row {
  display: grid;
  grid-template-columns: auto minmax(0,1fr) auto auto;
  align-items: center;
  gap: 11px;
  padding: 13px 14px;
  border: 1px solid rgba(19,43,58,.18);
  border-radius: 14px;
  background: var(--navy);
  color: white;
  text-decoration: none;
}
.mistake-fixer-row { background: #fff4ef; color: var(--navy); border-color: rgba(233,104,87,.3); }
.final-assessment-row > div,
.mistake-fixer-row > div { display: grid; gap: 2px; }
.final-assessment-row strong,
.mistake-fixer-row strong { font-size: 12px; }
.final-assessment-row small { color: rgba(255,255,255,.68); font-size: 9px; }
.mistake-fixer-row small { color: var(--ink-muted); font-size: 9px; }
.final-assessment-row > span:not(.topic-icon) { padding: 5px 8px; border-radius: 999px; background: var(--mango); color: var(--navy); font-size: 9px; font-weight: 900; }
.final-assessment-row.assessment-locked { border-style: dashed; border-color: #d7bf87; background: #5d6463; }
.final-assessment-row.assessment-locked > span:not(.topic-icon) { background: #f3e2b6; }

.attempt-history-list article.form { border-color: rgba(181,108,11,.25); background: #fffaf0; }
.attempt-history-list article.form .attempt-status-icon { background: #b56c0b; }
.attempt-correction.form-note { border-color: #ead18f; background: #fff7df; }

@media (max-width: 700px) {
  .admin-preview-bar { position: static; align-items: stretch; flex-direction: column; width: calc(100% - 20px); margin-top: 9px; }
  .admin-preview-bar nav { display: grid; grid-template-columns: 1fr 1.4fr; }
  .admin-preview-bar a { justify-content: center; text-align: center; }
  .chapter-folder-body { padding-left: 9px; }
  .folder-path-list { padding-left: 9px; }
  .chapter-folder > summary,
  .topic-folder > summary { grid-template-columns: auto minmax(0,1fr) auto; }
  .chapter-folder > summary::after,
  .topic-folder > summary::after { display: none; }
  .folder-path-list .topic-row { grid-template-columns: auto minmax(0,1fr) auto; }
  .folder-path-list .topic-progress { display: none; }
  .folder-path-list .topic-arrow { grid-column: 3; }
  .final-assessment-row,
  .mistake-fixer-row { grid-template-columns: auto minmax(0,1fr) auto; }
  .final-assessment-row > span:not(.topic-icon) { display: none; }
  .topic-copy small { white-space: normal; }
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--cream);
  color: var(--navy);
  font-family: var(--font-sans);
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 7% 10%, rgba(255, 196, 94, 0.13), transparent 23rem),
    radial-gradient(circle at 92% 8%, rgba(39, 143, 134, 0.11), transparent 25rem),
    var(--cream);
  color: var(--navy);
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible {
  outline: 3px solid rgba(39, 143, 134, 0.28);
  outline-offset: 2px;
}

sup {
  position: relative;
  top: -0.42em;
  font-size: 0.62em;
  line-height: 0;
}

.study-app {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 72px;
  padding: 12px clamp(18px, 3vw, 44px);
  border-bottom: 1px solid var(--line-dark);
  background: rgba(255, 254, 250, 0.9);
  backdrop-filter: blur(18px);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 12px;
  background: var(--navy);
  box-shadow: 0 4px 0 var(--mango);
  color: var(--white);
  font-family: var(--font-math);
  font-size: 21px;
  font-weight: 700;
}

.brand-name,
.brand-subtitle,
.chapter-crumb,
.overall-copy strong,
.overall-copy span,
.rail-heading span,
.rail-heading small,
.level-label strong,
.level-label small,
.rail-note p,
.session-bar h1,
.session-bar p,
.level-score small,
.instruction,
.condition,
.paper-prompt,
.builder-heading h2,
.support-row span,
.hint-card p,
.feedback-copy h3,
.feedback-copy p,
.law-name,
.mastery-card p,
.session-card p {
  margin: 0;
}

.brand-name {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-subtitle {
  margin-top: 2px;
  color: var(--teal);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.chapter-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink-muted);
  font-size: 12px;
}

.chapter-crumb strong {
  color: var(--navy);
}

.overall-progress {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 10px;
}

.progress-ring {
  --progress: 0deg;
  position: relative;
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 50%;
  background: conic-gradient(var(--teal) var(--progress), #e5ebe8 0);
}

.progress-ring::after {
  position: absolute;
  width: 34px;
  height: 34px;
  border-radius: inherit;
  background: var(--paper);
  content: "";
}

.progress-ring span {
  position: relative;
  z-index: 1;
  font-size: 10px;
  font-weight: 900;
}

.overall-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.overall-copy strong {
  font-size: 11px;
}

.overall-copy span {
  color: var(--ink-muted);
  font-size: 10px;
}

.study-layout {
  display: grid;
  grid-template-columns: 232px minmax(500px, 760px) 268px;
  gap: 24px;
  width: min(100%, 1370px);
  margin: 0 auto;
  padding: 28px clamp(18px, 3vw, 44px) 54px;
  align-items: start;
}

.level-rail,
.study-sidebar {
  position: sticky;
  top: 100px;
}

.level-rail {
  padding: 18px 14px 15px;
  border: 1px solid var(--line-dark);
  border-radius: 18px;
  background: rgba(255, 254, 250, 0.78);
  box-shadow: var(--shadow-sm);
}

.practice-picker {
  display: grid;
  gap: 6px;
  margin-bottom: 15px;
}

.practice-picker button {
  display: flex;
  min-height: 50px;
  align-items: flex-start;
  justify-content: center;
  flex-direction: column;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: white;
  cursor: pointer;
  text-align: left;
}

.practice-picker button span {
  font-size: 11px;
  font-weight: 900;
}

.practice-picker button small {
  margin-top: 2px;
  color: var(--ink-muted);
  font-size: 9px;
}

.practice-picker button:hover {
  border-color: var(--teal);
}

.practice-picker button.active {
  border-color: var(--teal);
  background: var(--teal-soft);
  box-shadow: inset 3px 0 0 var(--teal);
}

.practice-picker button.challenge-option.active {
  border-color: var(--mango);
  background: var(--mango-soft);
  box-shadow: inset 3px 0 0 #d88a15;
}

.challenge-rail,
.daily-rail {
  padding: 5px 5px 2px;
}

.challenge-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--teal);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.challenge-rail h2,
.daily-rail h2 {
  margin: 12px 0 6px;
  font-family: var(--font-math);
  font-size: 22px;
  line-height: 1.05;
}

.challenge-rail p,
.daily-rail p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 10px;
  line-height: 1.5;
}

.challenge-stat {
  display: flex;
  align-items: baseline;
  gap: 7px;
  margin-top: 16px;
  padding: 12px;
  border-radius: 11px;
  background: var(--mango-soft);
}

.challenge-stat strong {
  font-size: 24px;
}

.challenge-stat span {
  color: var(--ink-muted);
  font-size: 9px;
  font-weight: 750;
}

.daily-date-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-top: 14px;
}

.daily-date-nav button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: white;
  cursor: pointer;
  font-size: 9px;
  font-weight: 850;
}

.daily-date-nav button:disabled {
  cursor: default;
  opacity: 0.42;
}

.rail-heading {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 0 6px 13px;
  border-bottom: 1px solid var(--line);
}

.rail-heading span {
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rail-heading small {
  color: var(--ink-muted);
  font-size: 11px;
}

.level-list {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 11px 0;
}

.level-button {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 10px;
  padding: 9px 8px;
  border: 0;
  border-radius: 11px;
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: background 160ms ease, transform 160ms ease;
}

.level-button:hover {
  background: rgba(39, 143, 134, 0.08);
}

.level-button.active {
  background: var(--teal-soft);
}

.level-button:active {
  transform: translateY(1px);
}

.level-number {
  --level-colour: var(--teal);
  display: grid;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--level-colour) 35%, white);
  border-radius: 10px;
  background: color-mix(in srgb, var(--level-colour) 10%, white);
  color: var(--level-colour);
  font-size: 11px;
  font-weight: 900;
}

.level-button.active .level-number {
  border-color: var(--level-colour);
  background: var(--level-colour);
  color: white;
}

.level-label {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 2px;
}

.level-label strong {
  overflow: hidden;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.level-label small {
  color: var(--ink-muted);
  font-size: 10px;
}

.rail-note {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 10px;
  border-radius: 11px;
  background: var(--mango-soft);
  color: var(--navy);
}

.rail-note svg {
  flex: 0 0 auto;
  margin-top: 1px;
  color: #bb7412;
}

.rail-note p {
  font-size: 10px;
  line-height: 1.45;
}

.rail-note strong {
  display: block;
  margin-bottom: 1px;
}

.practice-column {
  min-width: 0;
}

.session-bar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 17px;
  padding: 4px 2px 0;
}

.eyebrow {
  display: block;
  color: var(--teal);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.session-bar h1 {
  margin-top: 5px;
  font-family: var(--font-math);
  font-size: clamp(23px, 3vw, 31px);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.session-bar p {
  max-width: 560px;
  margin-top: 5px;
  color: var(--ink-muted);
  font-size: 12px;
  line-height: 1.5;
}

.level-score {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  align-items: flex-end;
}

.level-score strong {
  font-size: 25px;
  line-height: 1;
}

.level-score strong span {
  color: var(--ink-muted);
  font-size: 13px;
}

.level-score small {
  margin-top: 4px;
  color: var(--ink-muted);
  font-size: 9px;
  text-transform: uppercase;
}

.question-card {
  overflow: hidden;
  border: 1px solid var(--line-dark);
  border-radius: 20px;
  background: var(--paper);
  box-shadow: var(--shadow-md);
}

.question-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 243, 233, 0.5);
}

.question-count {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--ink-muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.difficulty-pill,
.marks-pill,
.builder-safe {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.difficulty-pill {
  padding: 4px 8px;
  background: var(--teal-soft);
  color: #176d65;
}

.difficulty-pill.challenge {
  background: #f0e7f6;
  color: #6d4687;
}

.difficulty-pill.stretch {
  background: var(--mango-soft);
  color: #9a5d09;
}

.marks-pill {
  padding: 5px 9px;
  border: 1px solid var(--line-dark);
  background: white;
  color: var(--navy);
}

.question-body {
  position: relative;
  padding: clamp(24px, 4vw, 38px) clamp(20px, 4vw, 36px) 22px;
  background-image:
    linear-gradient(rgba(39, 143, 134, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(39, 143, 134, 0.045) 1px, transparent 1px);
  background-size: 22px 22px;
}

.instruction {
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 700;
}

.question-expression {
  margin: clamp(24px, 5vw, 42px) 0;
  overflow-x: auto;
  overflow-wrap: normal;
  color: var(--navy);
  font-family: var(--font-math);
  font-size: clamp(22px, 5vw, 42px);
  font-weight: 700;
  line-height: 1.35;
  text-align: center;
  white-space: nowrap;
  scrollbar-width: thin;
}

.display-math-fraction {
  display: inline-flex;
  min-width: 3em;
  align-items: stretch;
  flex-direction: column;
  margin: 0 0.18em;
  vertical-align: middle;
  line-height: 1.1;
}

.display-math-fraction > span:first-child {
  padding: 0.12em 0.28em 0.2em;
  border-bottom: 0.07em solid currentColor;
}

.display-math-fraction > span:last-child {
  padding: 0.2em 0.28em 0.12em;
}

.condition {
  margin-top: -18px;
  color: var(--ink-muted);
  font-family: var(--font-math);
  font-size: 11px;
  font-style: italic;
  text-align: center;
}

.paper-prompt {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  padding-top: 14px;
  border-top: 1px dashed rgba(19, 43, 58, 0.18);
  color: var(--ink-muted);
  font-size: 11px;
  line-height: 1.45;
}

.pencil-dot {
  display: grid;
  width: 25px;
  height: 25px;
  flex: 0 0 25px;
  place-items: center;
  border-radius: 50%;
  background: var(--mango-soft);
  color: var(--navy);
}

.answer-builder {
  padding: 20px;
  border-top: 1px solid var(--line);
  background: #f4f8f7;
}

.builder-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 15px;
}

.builder-heading h2 {
  margin-top: 3px;
  font-size: 15px;
  letter-spacing: -0.015em;
}

.builder-safe {
  gap: 5px;
  padding: 6px 9px;
  background: var(--teal-soft);
  color: #176d65;
  white-space: nowrap;
}

.builder-display {
  display: flex;
  min-height: 88px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 12px 20px;
  border: 1px solid rgba(19, 43, 58, 0.16);
  border-radius: 13px;
  background: white;
  box-shadow: inset 0 1px 0 rgba(19, 43, 58, 0.03);
  color: var(--navy);
  font-family: var(--font-math);
  font-size: clamp(24px, 5vw, 34px);
  transition: border-color 160ms ease, box-shadow 160ms ease;
  overflow-x: auto;
}

.builder-display.correct {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(39, 143, 134, 0.12);
}

.builder-display.wrong,
.builder-display.form {
  border-color: var(--coral);
}

.answer-part {
  min-width: 90px;
  min-height: 36px;
  padding: 2px 9px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: inherit;
  cursor: text;
  font-family: inherit;
  font-size: inherit;
}

.answer-part.selected {
  background: var(--mango-soft);
  box-shadow: inset 0 -2px 0 var(--mango);
}

.fraction-line {
  width: min(220px, 72%);
  height: 2px;
  margin: 3px 0;
  background: var(--navy);
}

.builder-tools {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  margin-top: 12px;
  align-items: stretch;
}

.keypad {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 7px;
}

.keypad-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.keypad-row button {
  display: grid;
  min-width: 34px;
  height: 33px;
  place-items: center;
  padding: 0 9px;
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  background: white;
  box-shadow: 0 1px 1px rgba(19, 43, 58, 0.04);
  cursor: pointer;
  font-size: 12px;
  font-weight: 750;
  transition: background 150ms ease, transform 150ms ease;
}

.keypad-row button:hover {
  background: var(--mango-soft);
}

.keypad-row button:active {
  transform: translateY(1px);
}

.keypad-row button.variable-key {
  border-color: rgba(39, 143, 134, 0.3);
  background: var(--teal-soft);
  color: #176d65;
  font-family: var(--font-math);
  font-size: 15px;
}

.keypad-row button.power-chip {
  min-width: 52px;
  font-family: var(--font-math);
}

.keypad-row button.active-tool {
  border-color: var(--teal);
  background: var(--teal-soft);
}

.mini-fraction,
.math-fraction {
  display: inline-flex;
  align-items: center;
  flex-direction: column;
  line-height: 1;
}

.mini-fraction span:first-child,
.math-fraction span:first-child {
  padding: 0 5px 2px;
  border-bottom: 1px solid currentColor;
}

.mini-fraction span:last-child,
.math-fraction span:last-child {
  padding: 2px 5px 0;
}

.submit-answer {
  display: inline-flex;
  min-width: 164px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 17px;
  border: 0;
  border-radius: 10px;
  background: var(--navy);
  box-shadow: 0 4px 0 var(--mango);
  color: white;
  cursor: pointer;
  font-size: 12px;
  font-weight: 850;
  transition: background 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.submit-answer:hover {
  background: var(--navy-2);
}

.submit-answer:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 var(--mango);
}

.inline-message {
  margin: 10px 0 0;
  font-size: 11px;
  font-weight: 700;
}

.inline-message.error {
  color: var(--coral);
}

.support-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 2px 0;
}

.hint-button,
.feedback-actions button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--navy);
  cursor: pointer;
  font-size: 11px;
  font-weight: 800;
}

.hint-button:hover,
.feedback-actions button:hover {
  background: rgba(39, 143, 134, 0.08);
}

.support-row > span {
  color: var(--ink-muted);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hint-card,
.feedback-card {
  margin-top: 12px;
  border-radius: 14px;
}

.hint-card {
  padding: 14px 16px;
  border: 1px solid #efd490;
  background: var(--mango-soft);
}

.hint-card > span {
  color: #946017;
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hint-card p {
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.55;
}

.feedback-card {
  display: flex;
  gap: 13px;
  padding: 18px;
  border: 1px solid rgba(39, 143, 134, 0.3);
  background: #eef9f6;
}

.feedback-card.wrong,
.feedback-card.form {
  border-color: rgba(233, 104, 87, 0.3);
  background: #fff5f2;
}

.feedback-icon {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  place-items: center;
  border-radius: 50%;
  background: var(--teal);
  color: white;
}

.wrong .feedback-icon,
.form .feedback-icon {
  background: var(--coral);
}

.feedback-copy {
  min-width: 0;
  flex: 1;
}

.feedback-copy h3 {
  margin-top: 3px;
  font-family: var(--font-math);
  font-size: 20px;
}

.feedback-copy > p {
  margin-top: 5px;
  color: var(--ink-muted);
  font-size: 12px;
  line-height: 1.5;
}

.worked-solution {
  margin-top: 11px;
  padding: 12px;
  border-left: 3px solid var(--teal);
  border-radius: 0 8px 8px 0;
  background: rgba(255, 255, 255, 0.7);
  font-family: var(--font-math);
  font-size: 12px;
  line-height: 1.65;
}

.worked-solution p + p {
  margin-top: 3px;
}

.final-answer-line {
  margin-top: 7px !important;
  color: var(--teal);
}

.feedback-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.feedback-actions button.next-button {
  background: var(--navy);
  color: white;
}

.study-sidebar {
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.law-card,
.mastery-card,
.session-card {
  border: 1px solid var(--line-dark);
  border-radius: 16px;
  background: rgba(255, 254, 250, 0.86);
  box-shadow: var(--shadow-sm);
}

.law-card {
  overflow: hidden;
}

.law-card-top {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 14px;
  background: var(--navy);
  color: var(--mango);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.law-name {
  padding: 16px 15px 10px;
  font-size: 12px;
  font-weight: 750;
  line-height: 1.45;
}

.law-example {
  margin: 0 15px 15px;
  padding: 14px 10px;
  border-radius: 10px;
  background: var(--teal-soft);
  font-family: var(--font-math);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  text-align: center;
}

.mastery-card,
.session-card {
  padding: 15px;
}

.mastery-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 11px;
  font-weight: 850;
}

.mastery-topline strong {
  color: var(--teal);
  font-size: 15px;
}

.mastery-track {
  overflow: hidden;
  height: 5px;
  margin-top: 9px;
  border-radius: 99px;
  background: #e4eae7;
}

.mastery-track span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--teal);
  transition: width 300ms ease;
}

.pattern-dots {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 4px;
  margin-top: 13px;
}

.pattern-dots span {
  display: grid;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
  color: var(--ink-muted);
  font-size: 8px;
  font-weight: 850;
}

.pattern-dots span.current {
  border-color: var(--mango);
  box-shadow: 0 0 0 2px var(--mango-soft);
  color: var(--navy);
}

.pattern-dots span.passed {
  border-color: var(--teal);
  background: var(--teal);
  color: white;
}

.mastery-card p,
.session-card p {
  margin-top: 11px;
  color: var(--ink-muted);
  font-size: 10px;
  line-height: 1.45;
}

.session-card > span {
  display: block;
  margin-bottom: 10px;
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.session-card > div {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 0;
  border-top: 1px solid var(--line);
}

.session-card strong {
  font-size: 20px;
}

.session-card small {
  color: var(--ink-muted);
  font-size: 10px;
}

a.brand-lockup {
  color: inherit;
  text-decoration: none;
}

.chapter-crumb a {
  color: inherit;
  text-decoration: none;
}

.chapter-crumb a:hover {
  color: var(--teal);
}

.learning-home {
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 8%, rgba(255, 196, 94, 0.15), transparent 28rem),
    radial-gradient(circle at 88% 15%, rgba(39, 143, 134, 0.14), transparent 27rem),
    var(--cream);
}

.home-topbar {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid var(--line-dark);
  background: rgba(255, 254, 250, 0.88);
  backdrop-filter: blur(16px);
}

.home-profile {
  display: flex;
  align-items: center;
  gap: 11px;
}

.profile-status {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-muted);
  font-size: 10px;
  font-weight: 700;
}

.profile-status > span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 3px var(--teal-soft);
}

.profile-avatar {
  display: grid;
  width: 37px;
  height: 37px;
  place-items: center;
  border: 1px solid rgba(39, 143, 134, 0.28);
  border-radius: 50%;
  background: var(--teal-soft);
  color: #176d65;
  font-family: var(--font-math);
  font-size: 16px;
  font-weight: 800;
}

.home-shell {
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 56px) clamp(18px, 4vw, 44px) 64px;
}

.home-welcome {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.home-welcome h1 {
  margin: 5px 0 0;
  font-family: var(--font-math);
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.home-welcome p {
  max-width: 650px;
  margin: 9px 0 0;
  color: var(--ink-muted);
  font-size: 13px;
  line-height: 1.6;
}

.today-chip {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 7px;
  padding: 8px 11px;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink-muted);
  font-size: 10px;
  font-weight: 750;
}

.continue-card {
  display: grid;
  grid-template-columns: minmax(240px, 0.78fr) minmax(340px, 1.22fr);
  min-height: 300px;
  overflow: hidden;
  border: 1px solid var(--line-dark);
  border-radius: 24px;
  background: var(--paper);
  box-shadow: var(--shadow-md);
}

.continue-visual {
  position: relative;
  display: grid;
  min-height: 300px;
  place-items: center;
  overflow: hidden;
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    var(--navy);
  background-size: 24px 24px;
}

.continue-visual::before,
.continue-visual::after {
  position: absolute;
  border-radius: 50%;
  content: "";
}

.continue-visual::before {
  width: 220px;
  height: 220px;
  border: 1px solid rgba(255, 196, 94, 0.22);
}

.continue-visual::after {
  width: 155px;
  height: 155px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.continue-visual > span {
  position: relative;
  z-index: 2;
  display: grid;
  width: 112px;
  height: 112px;
  place-items: center;
  border-radius: 30px;
  background: var(--mango);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.22);
  color: var(--navy);
  font-family: var(--font-math);
  font-size: 37px;
  font-weight: 800;
}

.floating-power {
  position: absolute;
  z-index: 3;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-family: var(--font-math);
  font-size: 16px;
  backdrop-filter: blur(6px);
}

.power-one {
  top: 40px;
  left: 34px;
}

.power-two {
  right: 30px;
  bottom: 38px;
}

.power-three {
  top: 65px;
  right: 24px;
}

.continue-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(28px, 5vw, 54px);
}

.continue-kicker {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--teal);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.continue-copy h2 {
  margin: 10px 0 0;
  font-family: var(--font-math);
  font-size: clamp(35px, 5vw, 48px);
  line-height: 1;
  letter-spacing: -0.04em;
}

.continue-copy > p {
  margin: 7px 0 0;
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 650;
}

.home-progress-row {
  display: grid;
  width: 100%;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  margin-top: 25px;
}

.home-progress-track {
  overflow: hidden;
  height: 7px;
  border-radius: 99px;
  background: #e4eae7;
}

.home-progress-track span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--teal);
}

.home-progress-row strong {
  color: var(--teal);
  font-size: 13px;
}

.continue-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 16px;
  margin-top: 8px;
  color: var(--ink-muted);
  font-size: 10px;
}

.continue-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 25px;
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--navy);
  box-shadow: 0 4px 0 var(--mango);
  color: white;
  font-size: 12px;
  font-weight: 850;
  text-decoration: none;
}

.continue-button:hover {
  background: var(--navy-2);
}

.home-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 0.7fr);
  gap: 20px;
  margin-top: 22px;
}

.topic-library,
.focus-card,
.tutor-card {
  border: 1px solid var(--line-dark);
  border-radius: 18px;
  background: rgba(255, 254, 250, 0.84);
  box-shadow: var(--shadow-sm);
}

.topic-library {
  padding: 20px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}

.section-heading h2 {
  margin: 5px 0 0;
  font-family: var(--font-math);
  font-size: 23px;
  letter-spacing: -0.025em;
}

.topic-count,
.coming-soon {
  padding: 5px 8px;
  border-radius: 999px;
  background: var(--teal-soft);
  color: #176d65;
  font-size: 9px;
  font-weight: 850;
  white-space: nowrap;
}

.topic-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-top: 17px;
}

.topic-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  min-height: 68px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: white;
}

a.topic-row {
  color: inherit;
  text-decoration: none;
  transition: border-color 150ms ease, transform 150ms ease;
}

a.topic-row:hover {
  border-color: var(--teal);
  transform: translateY(-1px);
}

.topic-icon {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 10px;
  background: var(--teal-soft);
  color: var(--teal);
}

.topic-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 3px;
}

.topic-copy strong {
  font-size: 12px;
}

.topic-copy small {
  overflow: hidden;
  color: var(--ink-muted);
  font-size: 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topic-progress {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--teal);
  font-size: 10px;
  font-weight: 850;
}

.topic-arrow {
  color: var(--ink-muted);
}

.upcoming-topic {
  opacity: 0.7;
}

.upcoming-topic .topic-icon {
  background: #edf0ef;
  color: var(--ink-muted);
}

.challenge-topic .topic-icon {
  background: var(--mango-soft);
  color: #b56c0b;
}

.daily-topic .topic-icon {
  background: #f0e7f6;
  color: #6d4687;
}

.coming-soon {
  background: #edf0ef;
  color: var(--ink-muted);
}

.home-side-stack {
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.focus-card,
.tutor-card {
  padding: 20px;
}

.focus-card {
  background: var(--navy);
  color: white;
}

.focus-card > svg {
  color: var(--mango);
}

.focus-card > span,
.tutor-card > span {
  display: block;
  margin-top: 13px;
  color: var(--mango);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.focus-card h3 {
  margin: 7px 0 0;
  font-family: var(--font-math);
  font-size: 20px;
  line-height: 1.25;
}

.focus-card p,
.tutor-card p {
  margin: 10px 0 0;
  font-size: 11px;
  line-height: 1.55;
}

.focus-card p {
  color: rgba(255, 255, 255, 0.68);
}

.tutor-card > span {
  margin-top: 0;
  color: var(--teal);
}

.tutor-card p {
  color: var(--navy);
  font-family: var(--font-math);
  font-size: 13px;
  font-style: italic;
}

::selection {
  background: var(--mango);
  color: var(--navy);
}

.login-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(100%, 430px);
  padding: clamp(28px, 7vw, 44px);
  border: 1px solid var(--line-dark);
  border-radius: 24px;
  background: rgba(255, 254, 250, 0.94);
  box-shadow: var(--shadow-md);
}

.login-mark {
  display: grid;
  width: 52px;
  height: 52px;
  margin-bottom: 25px;
  place-items: center;
  border-radius: 15px;
  background: var(--navy);
  box-shadow: 0 5px 0 var(--mango);
  color: white;
  font-family: var(--font-math);
  font-size: 27px;
  font-weight: 700;
}

.login-card h1 {
  margin: 8px 0 7px;
  font-family: var(--font-math);
  font-size: 35px;
  line-height: 1.05;
}

.login-card > p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 13px;
}

.login-card form {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.login-card label {
  display: grid;
  gap: 7px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.login-card input {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--line-dark);
  border-radius: 10px;
  background: white;
  color: var(--navy);
  font-size: 15px;
}

.login-card input:focus {
  border-color: var(--teal);
  outline: 3px solid rgba(39, 143, 134, 0.12);
}

.login-card button {
  min-height: 49px;
  margin-top: 3px;
  border: 0;
  border-radius: 10px;
  background: var(--navy);
  box-shadow: 0 4px 0 var(--mango);
  color: white;
  cursor: pointer;
  font-size: 13px;
  font-weight: 850;
}

.login-card small {
  display: block;
  margin-top: 24px;
  color: var(--ink-muted);
  font-size: 10px;
  text-align: center;
}

.login-error {
  margin: 0;
  color: var(--coral);
  font-size: 12px;
  font-weight: 700;
}

.login-switch {
  display: block;
  margin-top: 16px;
  color: var(--teal);
  font-size: 11px;
  font-weight: 800;
  text-align: center;
  text-decoration: none;
}

.teacher-login-mark,
.teacher-brand-mark {
  background: var(--teal);
}

.teacher-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 88% 8%, rgba(39, 143, 134, 0.13), transparent 28rem),
    var(--cream);
}

.teacher-topbar {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid var(--line-dark);
  background: rgba(255, 254, 250, 0.9);
  backdrop-filter: blur(16px);
}

.teacher-actions {
  display: flex;
  align-items: center;
  gap: 9px;
}

.teacher-actions a,
.teacher-actions button {
  min-height: 40px;
  padding: 9px 12px;
  border: 1px solid var(--line-dark);
  border-radius: 9px;
  background: white;
  color: var(--navy);
  cursor: pointer;
  font-size: 10px;
  font-weight: 800;
  text-decoration: none;
}

.teacher-actions form {
  margin: 0;
}

.teacher-shell {
  width: min(100%, 1180px);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 50px) clamp(16px, 4vw, 42px) 64px;
}

.teacher-welcome {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.teacher-welcome h1 {
  margin: 5px 0 0;
  font-family: var(--font-math);
  font-size: clamp(31px, 5vw, 45px);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.teacher-welcome p {
  margin: 8px 0 0;
  color: var(--ink-muted);
  font-size: 12px;
}

.teacher-live-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 10px;
  border-radius: 999px;
  background: var(--teal-soft);
  color: #176d65;
  font-size: 9px;
  font-weight: 850;
}

.teacher-live-status.error {
  background: #fff0ed;
  color: var(--coral);
}

.spinning {
  animation: teacher-spin 800ms linear infinite;
}

@keyframes teacher-spin {
  to { transform: rotate(360deg); }
}

.teacher-empty-state {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 22px;
  padding: 17px;
  border: 1px solid #e9ce86;
  border-radius: 14px;
  background: var(--mango-soft);
}

.teacher-empty-state svg {
  flex: 0 0 auto;
  color: #a86812;
}

.teacher-empty-state strong {
  font-size: 12px;
}

.teacher-empty-state p {
  margin: 4px 0 0;
  color: var(--ink-muted);
  font-size: 10px;
  line-height: 1.5;
}

.teacher-summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.teacher-summary-card {
  display: flex;
  min-height: 150px;
  align-items: flex-start;
  flex-direction: column;
  padding: 18px;
  border: 1px solid var(--line-dark);
  border-radius: 16px;
  background: var(--paper);
  box-shadow: var(--shadow-sm);
}

.teacher-summary-card > svg {
  color: var(--teal);
}

.teacher-summary-card > span {
  margin-top: 18px;
  color: var(--ink-muted);
  font-size: 9px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.teacher-summary-card > strong {
  margin-top: 4px;
  font-family: var(--font-math);
  font-size: 26px;
  line-height: 1.15;
}

.teacher-summary-card > small {
  margin-top: 5px;
  color: var(--ink-muted);
  font-size: 9px;
}

.teacher-summary-card.hard-card > svg {
  color: #b56c0b;
}

.teacher-summary-card.daily-card > svg {
  color: #6d4687;
}

.teacher-dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 14px;
  margin-top: 14px;
}

.teacher-panel {
  padding: 20px;
  border: 1px solid var(--line-dark);
  border-radius: 17px;
  background: rgba(255, 254, 250, 0.88);
  box-shadow: var(--shadow-sm);
}

.teacher-review-panel {
  grid-column: 1 / -1;
}

.teacher-panel-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
}

.teacher-panel-heading h2 {
  margin: 5px 0 0;
  font-family: var(--font-math);
  font-size: 22px;
}

.teacher-panel-heading > strong {
  color: var(--teal);
  font-size: 14px;
}

.teacher-level-list,
.daily-history-list,
.review-list {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.teacher-level-row {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  align-items: center;
  gap: 11px;
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: white;
}

.teacher-level-code {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 9px;
  background: var(--teal-soft);
  color: var(--teal);
  font-size: 10px;
  font-weight: 900;
}

.teacher-level-row > div > strong,
.teacher-level-row > span:last-child {
  font-size: 10px;
}

.teacher-mini-track {
  overflow: hidden;
  height: 4px;
  margin-top: 7px;
  border-radius: 99px;
  background: #e5ebe8;
}

.teacher-mini-track span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--teal);
}

.daily-history-list > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 3px 12px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.daily-history-list span,
.daily-history-list strong {
  font-size: 10px;
}

.daily-history-list small {
  grid-column: 1 / -1;
  color: var(--ink-muted);
  font-size: 9px;
}

.review-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.review-list > div {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: white;
}

.review-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 8px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--coral);
}

.review-list strong {
  display: block;
  font-size: 10px;
}

.review-list small {
  display: block;
  margin-top: 3px;
  color: var(--ink-muted);
  font-size: 9px;
}

.teacher-panel-empty {
  margin: 20px 0 0;
  color: var(--ink-muted);
  font-size: 11px;
}

@media (max-width: 1190px) {
  .study-layout {
    grid-template-columns: 218px minmax(0, 1fr);
    max-width: 1050px;
  }

  .study-sidebar {
    position: static;
    display: grid;
    grid-column: 2;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .topbar {
    grid-template-columns: 1fr auto;
  }

  .chapter-crumb {
    display: none;
  }

  .study-layout {
    display: block;
    max-width: 790px;
    padding-top: 18px;
  }

  .level-rail {
    position: static;
    margin-bottom: 20px;
    padding: 12px;
  }

  .practice-picker {
    grid-template-columns: repeat(3, minmax(140px, 1fr));
    overflow-x: auto;
    margin-bottom: 10px;
    padding-bottom: 3px;
    scrollbar-width: none;
  }

  .practice-picker::-webkit-scrollbar {
    display: none;
  }

  .practice-picker button {
    scroll-snap-align: start;
  }

  .challenge-rail,
  .daily-rail {
    padding: 9px 6px 4px;
  }

  .challenge-stat {
    max-width: 240px;
  }

  .rail-heading,
  .rail-note {
    display: none;
  }

  .level-list {
    display: grid;
    grid-template-columns: repeat(5, minmax(112px, 1fr));
    gap: 7px;
    overflow-x: auto;
    padding: 0 0 3px;
    overscroll-behavior-x: contain;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
  }

  .level-list::-webkit-scrollbar {
    display: none;
  }

  .level-button {
    overflow: hidden;
    flex-direction: column;
    align-items: flex-start;
    gap: 7px;
    padding: 9px;
    scroll-snap-align: start;
  }

  .level-label {
    width: 100%;
  }

  .level-label strong {
    max-width: 100%;
  }

  .study-sidebar {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 18px;
  }

  .continue-card {
    grid-template-columns: 0.8fr 1.2fr;
  }

  .home-grid {
    grid-template-columns: 1fr;
  }

  .home-side-stack {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .teacher-summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .teacher-dashboard-grid {
    grid-template-columns: 1fr;
  }

  .teacher-review-panel {
    grid-column: auto;
  }
}

@media (max-width: 650px) {
  .topbar {
    position: static;
    min-height: 64px;
    padding: 11px 15px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
  }

  .brand-name {
    font-size: 13px;
  }

  .overall-copy {
    display: none;
  }

  .progress-ring {
    width: 39px;
    height: 39px;
  }

  .progress-ring::after {
    width: 31px;
    height: 31px;
  }

  .study-layout {
    padding: 12px 12px 40px;
  }

  .level-rail {
    margin-bottom: 15px;
    border-radius: 13px;
  }

  .level-list {
    grid-template-columns: repeat(5, 116px);
  }

  .level-button {
    min-height: 88px;
    border: 1px solid rgba(19, 43, 58, 0.08);
    background: rgba(255, 255, 255, 0.64);
  }

  .level-label strong {
    min-height: 27px;
    line-height: 1.15;
    white-space: normal;
  }

  .session-bar {
    align-items: flex-start;
    margin-bottom: 12px;
  }

  .session-bar p {
    display: none;
  }

  .level-score {
    padding-top: 4px;
  }

  .question-card {
    border-radius: 15px;
  }

  .question-meta,
  .answer-builder {
    padding-right: 14px;
    padding-left: 14px;
  }

  .question-body {
    padding: 24px 16px 18px;
  }

  .question-expression {
    margin: 29px 0;
  }

  .builder-heading {
    align-items: flex-start;
  }

  .builder-safe {
    display: none;
  }

  .builder-tools {
    grid-template-columns: 1fr;
  }

  .submit-answer {
    min-height: 45px;
  }

  .keypad-row button {
    min-width: 44px;
    height: 44px;
    padding: 0 7px;
  }

  .practice-picker {
    grid-template-columns: repeat(3, 142px);
  }

  .practice-picker button {
    min-height: 58px;
  }

  .daily-date-nav button {
    min-height: 46px;
  }

  .study-sidebar {
    grid-template-columns: 1fr;
  }

  .law-card,
  .mastery-card,
  .session-card {
    border-radius: 13px;
  }

  .home-topbar {
    min-height: 64px;
    padding: 11px 15px;
  }

  .profile-status {
    display: none;
  }

  .home-shell {
    padding: 28px 13px 44px;
  }

  .home-welcome {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .home-welcome p {
    font-size: 12px;
  }

  .continue-card {
    grid-template-columns: 1fr;
    border-radius: 17px;
  }

  .continue-visual {
    min-height: 188px;
  }

  .continue-visual > span {
    width: 84px;
    height: 84px;
    border-radius: 23px;
    font-size: 29px;
  }

  .continue-visual::before {
    width: 155px;
    height: 155px;
  }

  .continue-visual::after {
    width: 116px;
    height: 116px;
  }

  .floating-power {
    font-size: 13px;
  }

  .power-one {
    top: 25px;
    left: 20px;
  }

  .power-two {
    right: 20px;
    bottom: 23px;
  }

  .power-three {
    top: 30px;
    right: 18px;
  }

  .continue-copy {
    padding: 26px 20px 29px;
  }

  .continue-copy h2 {
    font-size: 36px;
  }

  .topic-library,
  .focus-card,
  .tutor-card {
    border-radius: 14px;
  }

  .topic-library {
    padding: 16px;
  }

  .topic-count {
    display: none;
  }

  .topic-row {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .topic-progress,
  .coming-soon {
    display: none;
  }

  .topic-arrow {
    display: block;
  }

  .home-side-stack {
    grid-template-columns: 1fr;
  }

  .teacher-topbar {
    min-height: 64px;
    padding: 11px 14px;
  }

  .teacher-actions a {
    display: none;
  }

  .teacher-actions button {
    min-height: 44px;
  }

  .teacher-shell {
    padding: 27px 13px 44px;
  }

  .teacher-welcome {
    align-items: flex-start;
    flex-direction: column;
  }

  .teacher-summary-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .teacher-summary-card {
    min-height: 145px;
    padding: 15px;
  }

  .teacher-summary-card > strong {
    font-size: 21px;
  }

  .teacher-panel {
    padding: 16px;
  }

  .review-list {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* Guided courses, Standard Form, deadlines and admin review */
.deadline-card {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 82px;
  padding: 16px 19px;
  border: 1px solid rgba(233, 104, 87, 0.28);
  border-radius: 20px;
  background: linear-gradient(135deg, #fff7f1, #fffdf8);
  box-shadow: var(--shadow-sm);
}

.deadline-card.compact {
  min-width: 275px;
  min-height: 74px;
  padding: 13px 15px;
}

.deadline-card.urgent,
.deadline-card.overdue {
  border-color: rgba(210, 70, 59, 0.48);
  background: linear-gradient(135deg, #fff0eb, #fff9f5);
}

.deadline-card.complete {
  border-color: rgba(39, 143, 134, 0.3);
  background: var(--teal-soft);
}

.deadline-icon {
  display: grid;
  width: 39px;
  height: 39px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 13px;
  background: var(--coral);
  color: white;
}

.deadline-card.complete .deadline-icon {
  background: var(--teal);
}

.deadline-card > div:last-child {
  display: grid;
  gap: 2px;
}

.deadline-kicker,
.deadline-card small {
  color: var(--ink-muted);
  font-size: 11px;
  font-weight: 700;
}

.deadline-kicker {
  color: var(--coral);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.deadline-card strong {
  font-size: 15px;
}

.continue-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.continue-secondary {
  min-height: 44px;
  padding: 12px 15px;
  border: 1px solid var(--line-dark);
  border-radius: 12px;
  background: white;
  color: var(--navy);
  font-size: 13px;
  font-weight: 800;
}

.lesson-topic .topic-icon,
.standard-topic .topic-icon,
.standard-practice-topic .topic-icon {
  background: #eeecff;
  color: #6259c9;
}

.locked-topic {
  opacity: 0.72;
  background: #f1f2f0;
}

.admin-preview-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  width: min(1120px, calc(100% - 32px));
  margin: 14px auto 0;
  padding: 12px 16px;
  border: 1px solid rgba(98, 89, 201, 0.3);
  border-radius: 16px;
  background: #f0efff;
  color: #302a78;
}

.admin-preview-banner > svg {
  flex: 0 0 auto;
}

.admin-preview-banner > div {
  display: grid;
  flex: 1;
  gap: 2px;
}

.admin-preview-banner strong {
  font-size: 13px;
}

.admin-preview-banner span {
  font-size: 12px;
  line-height: 1.45;
}

.admin-preview-banner a {
  color: inherit;
  font-size: 12px;
  font-weight: 800;
}

.guided-course-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 80% 0%, color-mix(in srgb, var(--course-accent) 10%, transparent), transparent 28rem),
    #f5f4ef;
}

.course-topbar {
  position: sticky;
  z-index: 30;
  top: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 72px;
  padding: 11px clamp(18px, 3vw, 42px);
  border-bottom: 1px solid var(--line-dark);
  background: rgba(255, 254, 250, 0.92);
  backdrop-filter: blur(18px);
}

.course-back {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 7px;
  color: var(--navy);
  font-size: 13px;
  font-weight: 800;
}

.course-sync {
  display: inline-flex;
  align-items: center;
  justify-self: end;
  gap: 6px;
  padding: 8px 11px;
  border-radius: 999px;
  background: var(--teal-soft);
  color: var(--teal);
  font-size: 11px;
  font-weight: 800;
}

.course-sync.pending {
  background: var(--mango-soft);
  color: #8a5d08;
}

.course-layout {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  align-items: start;
  gap: 28px;
  width: min(1320px, calc(100% - 38px));
  margin: 0 auto;
  padding: 28px 0 70px;
}

.course-rail {
  position: sticky;
  top: 98px;
  overflow: hidden;
  border: 1px solid var(--line-dark);
  border-radius: 23px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-sm);
}

.course-rail-intro {
  display: grid;
  gap: 7px;
  padding: 20px;
  border-bottom: 1px solid var(--line-dark);
  background: linear-gradient(145deg, color-mix(in srgb, var(--course-accent) 10%, white), white);
}

.course-rail-intro > span,
.course-rail-intro small {
  color: var(--ink-muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.course-rail-intro h2 {
  margin: 0;
  font-family: var(--font-math);
  font-size: 27px;
}

.course-progress-track,
.sf-rail-progress > div {
  overflow: hidden;
  height: 7px;
  border-radius: 999px;
  background: #e6e8e5;
}

.course-progress-track span,
.sf-rail-progress > div span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--course-accent, #6259c9);
  transition: width 240ms ease;
}

.course-section-nav {
  display: grid;
  gap: 4px;
  padding: 10px;
}

.course-section-nav button {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px;
  border: 0;
  border-radius: 13px;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.course-section-nav button:hover,
.course-section-nav button.active {
  background: color-mix(in srgb, var(--course-accent) 9%, white);
}

.course-section-nav button > span:last-child {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.course-section-nav strong {
  overflow: hidden;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-section-nav small {
  color: var(--ink-muted);
  font-size: 10px;
}

.course-step-dot {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid var(--line-dark);
  border-radius: 10px;
  background: white;
  font-size: 11px;
  font-weight: 900;
}

.course-step-dot.done {
  border-color: transparent;
  background: var(--teal);
  color: white;
}

.course-practice-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  margin: 7px 10px 12px;
  padding: 12px;
  border-radius: 12px;
  background: var(--navy);
  color: white;
  font-size: 12px;
  font-weight: 800;
}

.course-stage {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.course-stage-hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 4px 2px 6px;
}

.course-stage-hero h1 {
  max-width: 730px;
  margin: 6px 0 7px;
  font-family: var(--font-math);
  font-size: clamp(31px, 4vw, 49px);
  line-height: 1.03;
  letter-spacing: -0.035em;
}

.course-stage-hero p {
  max-width: 680px;
  margin: 0;
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 1.65;
}

.course-panel {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line-dark);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow-sm);
}

.course-panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.course-panel-heading h2,
.lesson-intro-panel h2 {
  margin: 4px 0 5px;
  font-family: var(--font-math);
  font-size: clamp(25px, 3vw, 34px);
  letter-spacing: -0.025em;
}

.course-panel-heading p,
.lesson-intro-panel p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 13px;
  line-height: 1.55;
}

.course-count,
.lesson-time {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 11px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--course-accent) 10%, white);
  color: var(--course-accent);
  font-size: 11px;
  font-weight: 900;
}

.course-question-block {
  max-width: 760px;
  margin: 28px auto 0;
  padding: 28px;
  border-radius: 21px;
  background: #f7f7f3;
}

.question-skill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--course-accent, #6259c9);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.course-question-block h3,
.active-worked-step h3,
.exit-question-list h3 {
  margin: 10px 0;
  font-size: 18px;
}

.course-math,
.worked-expression {
  overflow-x: auto;
  margin: 14px 0 20px;
  padding: 20px;
  border: 1px solid var(--line-dark);
  border-radius: 16px;
  background: white;
  font-family: var(--font-math);
  font-size: clamp(24px, 4vw, 35px);
  line-height: 1.6;
  text-align: center;
}

.course-math.small {
  padding: 13px;
  font-size: 21px;
}

.course-choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.course-choice-grid button {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 54px;
  padding: 11px 13px;
  border: 1px solid var(--line-dark);
  border-radius: 13px;
  background: white;
  text-align: left;
  cursor: pointer;
}

.course-choice-grid button > span:first-child {
  display: grid;
  width: 27px;
  height: 27px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 9px;
  background: #eff1ef;
  font-size: 11px;
  font-weight: 900;
}

.course-choice-grid button.correct,
.worked-choice-grid button.correct {
  border-color: rgba(39, 143, 134, 0.45);
  background: var(--teal-soft);
}

.course-choice-grid button.wrong,
.worked-choice-grid button.wrong {
  border-color: rgba(233, 104, 87, 0.44);
  background: #fff0ec;
}

.course-feedback {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin-top: 15px;
  padding: 14px;
  border-radius: 14px;
  background: #fff0ec;
}

.course-feedback.correct {
  background: var(--teal-soft);
}

.course-feedback p {
  flex: 1 0 100%;
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
}

.course-feedback button,
.diagnostic-result button,
.lesson-complete-banner button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 13px;
  border: 0;
  border-radius: 11px;
  background: var(--navy);
  color: white;
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
}

.diagnostic-result {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 28px;
  max-width: 800px;
  margin: 8px auto;
}

.result-orbit {
  display: grid;
  width: 150px;
  height: 150px;
  place-items: center;
  align-content: center;
  border: 9px solid color-mix(in srgb, var(--course-accent) 25%, white);
  border-radius: 50%;
  background: white;
}

.result-orbit strong {
  font-family: var(--font-math);
  font-size: 43px;
  line-height: 1;
}

.result-orbit small {
  color: var(--ink-muted);
  font-size: 11px;
}

.diagnostic-result h2 {
  margin: 5px 0;
  font-family: var(--font-math);
  font-size: 31px;
}

.diagnostic-result p {
  margin: 0 0 16px;
  color: var(--ink-muted);
  line-height: 1.55;
}

.lesson-intro-panel {
  position: relative;
  overflow: hidden;
  padding-left: clamp(88px, 12vw, 132px);
  background: linear-gradient(135deg, color-mix(in srgb, var(--course-accent) 14%, white), white 70%);
}

.lesson-number-badge {
  position: absolute;
  inset: 0 auto 0 0;
  display: grid;
  width: clamp(72px, 10vw, 108px);
  place-items: center;
  background: var(--course-accent);
  color: white;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.teaching-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.teaching-grid article {
  padding: 18px;
  border: 1px solid var(--line-dark);
  border-radius: 17px;
  background: #fafaf7;
}

.teaching-grid article > span {
  color: var(--course-accent);
  font-size: 11px;
  font-weight: 900;
  text-transform: uppercase;
}

.teaching-formula {
  margin: 13px 0 9px;
  font-family: var(--font-math);
  font-size: 20px;
  line-height: 1.6;
}

.teaching-grid p,
.teaching-grid small {
  margin: 0;
  color: var(--ink-muted);
  font-size: 12px;
  line-height: 1.55;
}

.teaching-grid small {
  display: block;
  margin-top: 7px;
  color: var(--coral);
  font-weight: 700;
}

.worked-expression {
  margin-top: 22px;
  background: color-mix(in srgb, var(--course-accent) 5%, white);
}

.revealed-step-list {
  display: grid;
  gap: 8px;
}

.revealed-step {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 11px;
  padding: 12px;
  border-radius: 13px;
  background: #f1f7f5;
}

.revealed-step > span,
.worked-final > span {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  background: var(--teal);
  color: white;
}

.revealed-step small,
.step-label,
.worked-final small {
  color: var(--teal);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.revealed-step p,
.active-worked-step p,
.worked-final p {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.55;
}

.active-worked-step {
  margin-top: 10px;
  padding: 20px;
  border: 2px solid color-mix(in srgb, var(--course-accent) 35%, white);
  border-radius: 17px;
  background: white;
}

.worked-choice-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.worked-choice-grid button {
  min-height: 48px;
  padding: 10px;
  border: 1px solid var(--line-dark);
  border-radius: 11px;
  background: #fafaf8;
  cursor: pointer;
}

.worked-final {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 13px;
  margin-top: 12px;
  padding: 18px;
  border-radius: 16px;
  background: var(--teal-soft);
}

.worked-final strong {
  display: block;
  margin-top: 4px;
  font-family: var(--font-math);
  font-size: 27px;
}

.admin-reveal-all {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 14px;
  padding: 9px 11px;
  border: 1px solid rgba(98, 89, 201, 0.28);
  border-radius: 10px;
  background: #f0efff;
  color: #4b43a8;
  font-size: 11px;
  font-weight: 800;
  cursor: pointer;
}

.lesson-memory-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(240px, 0.75fr);
  gap: 18px;
}

.remember-panel ul {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.remember-panel li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  line-height: 1.5;
}

.remember-panel li svg {
  flex: 0 0 auto;
  margin-top: 3px;
  color: var(--teal);
}

.mistake-panel {
  background: #fff3dd;
}

.mistake-panel > span {
  display: block;
  margin: 12px 0 6px;
  color: #9a6505;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mistake-panel p {
  margin: 0;
  font-family: var(--font-math);
  font-size: 17px;
  line-height: 1.55;
}

.exit-question-list {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.exit-question-list article {
  padding: 20px;
  border: 1px solid var(--line-dark);
  border-radius: 17px;
  background: #fafaf7;
}

.inline-course-feedback {
  margin-top: 11px;
  padding: 11px 12px;
  border-radius: 11px;
  background: #fff0ec;
  font-size: 12px;
  line-height: 1.5;
}

.inline-course-feedback.correct {
  background: var(--teal-soft);
}

.inline-course-feedback button {
  margin-left: 9px;
  padding: 5px 8px;
  border: 0;
  border-radius: 7px;
  background: var(--navy);
  color: white;
  font-size: 10px;
  font-weight: 800;
  cursor: pointer;
}

.lesson-complete-banner {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-top: 18px;
  padding: 16px;
  border-radius: 16px;
  background: var(--teal-soft);
}

.lesson-complete-banner > span {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 12px;
  background: var(--teal);
  color: white;
}

.lesson-complete-banner > div {
  flex: 1;
}

.lesson-complete-banner p {
  margin: 2px 0 0;
  color: var(--ink-muted);
  font-size: 11px;
}

.theory-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.theory-summary-grid article {
  padding: 17px;
  border-radius: 16px;
  background: #f7f7f3;
}

.theory-summary-grid h3 {
  margin: 0 0 12px;
  font-family: var(--font-math);
  font-size: 20px;
}

.theory-summary-grid article > div {
  padding: 10px 0;
  border-top: 1px solid var(--line-dark);
}

.theory-summary-grid strong {
  display: block;
  font-family: var(--font-math);
  font-size: 16px;
}

.theory-summary-grid p {
  margin: 4px 0 0;
  color: var(--ink-muted);
  font-size: 11px;
  line-height: 1.45;
}

.theory-ready-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 15px;
  margin-top: 20px;
  padding: 18px;
  border-radius: 17px;
  background: var(--navy);
  color: white;
}

.theory-ready-card h3,
.theory-ready-card p {
  margin: 3px 0;
}

.theory-ready-card p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 11px;
}

.theory-ready-card a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 11px 13px;
  border-radius: 11px;
  background: var(--mango);
  color: var(--navy);
  font-size: 11px;
  font-weight: 900;
}

/* Standard Form practice */
.sf-practice-page {
  min-height: 100vh;
  background: radial-gradient(circle at 88% 0%, rgba(98, 89, 201, 0.12), transparent 30rem), #f5f4ef;
}

.sf-header {
  grid-template-columns: 1fr auto 1fr;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 10px;
}

.header-actions a,
.sync-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 11px;
  border-radius: 999px;
  background: white;
  color: var(--navy);
  font-size: 11px;
  font-weight: 800;
}

.sync-status {
  background: var(--teal-soft);
  color: var(--teal);
}

.sf-practice-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 880px);
  justify-content: center;
  align-items: start;
  gap: 26px;
  width: min(1250px, calc(100% - 36px));
  margin: 0 auto;
  padding: 28px 0 70px;
}

.sf-practice-rail {
  position: sticky;
  top: 94px;
  display: grid;
  gap: 13px;
}

.sf-practice-rail .deadline-card {
  min-width: 0;
}

.sf-rail-progress,
.sf-practice-rail nav {
  padding: 17px;
  border: 1px solid var(--line-dark);
  border-radius: 19px;
  background: white;
  box-shadow: var(--shadow-sm);
}

.sf-rail-progress {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px;
}

.sf-rail-progress > span,
.sf-rail-progress small {
  color: var(--ink-muted);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.sf-rail-progress > div,
.sf-rail-progress small {
  grid-column: 1 / -1;
}

.sf-rail-progress > div span {
  background: #6259c9;
}

.sf-practice-rail nav {
  display: grid;
  gap: 5px;
  padding: 9px;
}

.sf-practice-rail nav button {
  display: grid;
  grid-template-columns: 40px 1fr;
  align-items: center;
  gap: 9px;
  padding: 10px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.sf-practice-rail nav button.active,
.sf-practice-rail nav button:hover {
  background: #efeeff;
}

.sf-practice-rail nav button > span {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 11px;
  background: #f0f1ef;
  font-size: 11px;
  font-weight: 900;
}

.sf-practice-rail nav button.active > span {
  background: #6259c9;
  color: white;
}

.sf-practice-rail nav button div {
  display: grid;
  gap: 2px;
}

.sf-practice-rail nav strong {
  font-size: 12px;
}

.sf-practice-rail nav small {
  color: var(--ink-muted);
  font-size: 10px;
}

.sf-practice-rail nav button.mastery {
  margin-top: 5px;
  border-top: 1px solid var(--line-dark);
  border-radius: 0 0 12px 12px;
}

.sf-question-stage {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.sf-session-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding: 2px 3px 8px;
}

.sf-session-heading h1 {
  margin: 4px 0;
  font-family: var(--font-math);
  font-size: clamp(30px, 4vw, 45px);
}

.sf-session-heading p {
  max-width: 620px;
  margin: 0;
  color: var(--ink-muted);
  font-size: 13px;
}

.sf-question-card {
  overflow: hidden;
  border: 1px solid var(--line-dark);
  border-radius: 23px;
  background: white;
  box-shadow: var(--shadow-md);
}

.sf-question-card > .question-meta {
  padding: 13px 20px;
  border-bottom: 1px solid var(--line-dark);
}

.sf-question-copy,
.mastery-scenario,
.sf-checkpoint-prompt {
  padding: 24px clamp(18px, 4vw, 34px);
}

.sf-question-copy > span,
.mastery-scenario > span,
.sf-checkpoint-prompt > span {
  color: #6259c9;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.sf-question-copy h2,
.sf-checkpoint-prompt h2 {
  margin: 8px 0 0;
  font-family: var(--font-math);
  font-size: 23px;
}

.mastery-scenario {
  background: #f2f0ff;
}

.mastery-scenario p {
  margin: 12px 0 18px;
  font-family: var(--font-math);
  font-size: 19px;
  line-height: 1.55;
}

.checkpoint-path {
  display: flex;
  gap: 7px;
}

.checkpoint-path span {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.75);
  font-size: 10px;
  font-weight: 900;
}

.checkpoint-path span.current {
  background: #6259c9;
  color: white;
}

.checkpoint-path span.passed {
  background: var(--teal);
  color: white;
}

.sf-checkpoint-prompt {
  padding-bottom: 4px;
}

.sf-builder-card {
  padding: 24px clamp(18px, 4vw, 34px) 30px;
  border-top: 1px solid var(--line-dark);
  background: #fafaf7;
}

.sf-answer-builder-fields {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 10px;
  margin: 22px 0 13px;
  padding: 23px;
  border: 2px solid rgba(98, 89, 201, 0.22);
  border-radius: 17px;
  background: white;
}

.sf-answer-builder-fields label,
.ordinary-answer-field {
  display: grid;
  gap: 6px;
}

.sf-answer-builder-fields label > span,
.ordinary-answer-field > span {
  color: var(--ink-muted);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.sf-answer-builder-fields input {
  width: 150px;
  height: 49px;
  padding: 10px 12px;
  border: 1px solid var(--line-dark);
  border-radius: 11px;
  background: #fafaf8;
  font-family: var(--font-math);
  font-size: 20px;
}

.sf-answer-builder-fields .sf-exponent-field input {
  width: 72px;
}

.sf-times,
.sf-ten,
.sf-unit {
  padding-bottom: 10px;
  font-family: var(--font-math);
  font-size: 25px;
}

.sf-unit {
  color: var(--ink-muted);
  font-size: 17px;
}

.ordinary-answer-field {
  max-width: 540px;
  margin: 22px auto 13px;
}

.ordinary-answer-field > div {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ordinary-answer-field input {
  width: 100%;
  min-height: 54px;
  padding: 12px 14px;
  border: 2px solid rgba(98, 89, 201, 0.22);
  border-radius: 13px;
  background: white;
  font-family: var(--font-math);
  font-size: 20px;
}

.sf-choice-builder {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  max-width: 540px;
  margin: 22px auto 13px;
}

.sf-choice-builder button {
  min-height: 52px;
  border: 1px solid var(--line-dark);
  border-radius: 13px;
  background: white;
  font-weight: 800;
  cursor: pointer;
}

.sf-choice-builder button.selected {
  border-color: #6259c9;
  background: #efeeff;
}

.sf-builder-note {
  margin: 0 0 14px;
  color: var(--ink-muted);
  font-size: 10px;
  text-align: center;
}

.sf-builder-card .submit-answer {
  margin-left: auto;
}

.sf-support-row,
.admin-question-controls,
.admin-question-nav {
  display: flex;
  align-items: center;
  gap: 9px;
}

.sf-support-row button,
.admin-question-controls button,
.admin-question-nav > button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 42px;
  padding: 9px 12px;
  border: 1px solid var(--line-dark);
  border-radius: 11px;
  background: white;
  font-size: 11px;
  font-weight: 800;
  cursor: pointer;
}

.admin-question-controls {
  justify-content: center;
  padding: 11px;
  border: 1px solid rgba(98, 89, 201, 0.22);
  border-radius: 13px;
  background: #f0efff;
}

.admin-question-nav {
  justify-content: space-between;
  padding: 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.75);
}

.admin-question-nav .pattern-dots {
  flex: 1;
  justify-content: center;
}

/* Teacher evidence and course overview */
.teacher-actions .admin-preview-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.teacher-deadline-strip {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-bottom: 15px;
  padding: 14px 17px;
  border: 1px solid rgba(233, 104, 87, 0.28);
  border-radius: 17px;
  background: #fff5ec;
}

.teacher-deadline-strip.overdue {
  background: #fff0ec;
}

.teacher-deadline-strip div {
  display: grid;
  gap: 2px;
}

.teacher-deadline-strip span,
.teacher-deadline-strip small {
  color: var(--ink-muted);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.teacher-summary-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.standard-card {
  background: linear-gradient(145deg, #f1efff, white);
}

.course-choice-grid button.form,
.course-feedback.form,
.inline-course-feedback.form {
  border-color: #d7a52b;
  background: #fff8df;
  color: #72520b;
}

.cumulative-test-summary {
  margin-top: 15px;
  border-color: rgba(39, 143, 134, 0.28);
  background: linear-gradient(135deg, #f2fbf9, #fffdf8 72%);
}

.cumulative-test-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.cumulative-test-heading h2 {
  margin: 5px 0 4px;
  font-family: var(--font-math);
  font-size: clamp(20px, 2.4vw, 29px);
}

.cumulative-test-heading p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 11px;
}

.cumulative-test-status {
  padding: 8px 11px;
  border-radius: 999px;
  background: #dcefeb;
  color: var(--teal);
  font-size: 10px;
  font-weight: 900;
  white-space: nowrap;
}

.cumulative-test-summary.submitted .cumulative-test-status {
  background: var(--teal);
  color: white;
}

.cumulative-test-summary.expired .cumulative-test-status {
  background: #fff0ec;
  color: #b14636;
}

.cumulative-test-details {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 9px;
  margin-top: 17px;
}

.cumulative-test-details > div {
  display: grid;
  gap: 4px;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.78);
}

.cumulative-test-details span {
  color: var(--ink-muted);
  font-size: 8px;
  font-weight: 850;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.cumulative-test-details strong {
  color: var(--navy);
  font-size: 11px;
}

.cumulative-test-preview {
  display: inline-flex;
  margin-top: 13px;
  padding: 9px 12px;
  border-radius: 9px;
  background: var(--navy);
  color: white;
  font-size: 9px;
  font-weight: 850;
  text-decoration: none;
}

.cumulative-test-summary.locked { border-color: #e3cc96; background: linear-gradient(135deg, #fff9e9, #fffdf8 72%); }
.cumulative-test-summary.locked .cumulative-test-status { background: #f5dfaa; color: #80500d; }
.test-readiness-list { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 7px; margin-top: 16px; }
.test-readiness-list > a { display: grid; grid-template-columns: 29px minmax(0,1fr) auto; align-items: center; gap: 8px; padding: 9px 10px; border: 1px solid var(--line); border-radius: 10px; background: rgba(255,255,255,.8); color: var(--navy); text-decoration: none; }
.test-readiness-list > a > span { display: grid; width: 27px; height: 27px; place-items: center; border-radius: 8px; background: #f7e6bd; color: #8a570d; }
.test-readiness-list > a.complete > span { background: var(--teal); color: white; }
.test-readiness-list svg { width: 13px; }
.test-readiness-list strong { font-size: 9px; }
.test-readiness-list small { color: var(--ink-muted); font-size: 8px; }
.teacher-test-paper-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 9px; margin-top: 13px; }
.teacher-test-paper-grid > article { padding: 13px; border: 1px solid var(--line); border-radius: 12px; background: white; }
.teacher-test-paper-grid > article > div { display: flex; align-items: center; justify-content: space-between; gap: 9px; }
.teacher-test-paper-grid span { color: var(--teal); font-size: 8px; font-weight: 900; text-transform: uppercase; }
.teacher-test-paper-grid strong { font-size: 10px; }
.teacher-test-paper-grid p { margin: 8px 0 4px; font-size: 10px; }
.teacher-test-paper-grid small { color: var(--ink-muted); font-size: 8px; }
.teacher-test-evidence { margin-top: 12px; border-top: 1px solid var(--line); }
.teacher-test-evidence > summary { padding: 11px 0 2px; color: var(--teal); cursor: pointer; font-size: 9px; font-weight: 850; }
.teacher-test-evidence > div { display: grid; max-height: 640px; gap: 9px; margin-top: 10px; overflow-y: auto; }
.teacher-test-evidence > div > article { padding: 11px; border: 1px solid var(--line); border-left: 3px solid var(--line-dark); border-radius: 10px; background: #fbfcfa; }
.teacher-test-evidence > div > article.correct { border-left-color: var(--teal); }
.teacher-test-evidence > div > article.wrong,
.teacher-test-evidence > div > article.blank { border-left-color: var(--coral); }
.teacher-test-evidence > div > article.form { border-left-color: #c17a10; }
.teacher-test-evidence article > header { display: grid; grid-template-columns: 34px minmax(0,1fr) auto; align-items: start; gap: 8px; }
.teacher-test-evidence article > header > span { display: grid; width: 32px; height: 32px; place-items: center; border-radius: 8px; background: #edf2f0; color: var(--navy); font-size: 8px; }
.teacher-test-evidence article > header strong { display: block; color: var(--teal); font-size: 8px; text-transform: uppercase; }
.teacher-test-evidence article > header p { margin: 4px 0 0; font-family: var(--font-math); font-size: 12px; line-height: 1.4; }
.teacher-test-evidence article > header em { font-size: 9px; font-style: normal; font-weight: 850; }
.teacher-test-scenario,
.teacher-test-expression { margin-top: 9px; padding: 9px; border-radius: 8px; background: #f2f7f5; font-family: var(--font-math); font-size: 11px; line-height: 1.5; }
.teacher-test-evidence .exam-diagram-card { margin: 9px 0 0; }
.teacher-test-evidence dl { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; margin: 9px 0 0; }
.teacher-test-evidence dl > div { padding: 8px; border-radius: 8px; background: #f3f5f3; }
.teacher-test-evidence dt { color: var(--ink-muted); font-size: 7px; font-weight: 850; text-transform: uppercase; }
.teacher-test-evidence dd { margin: 4px 0 0; overflow-wrap: anywhere; font-family: var(--font-math); font-size: 11px; }

.guided-overview-panel,
.mistake-insights-panel,
.answer-history-panel {
  margin-top: 15px;
}

.guided-course-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.guided-course-summary-grid article {
  padding: 16px;
  border: 1px solid var(--line-dark);
  border-radius: 15px;
  background: #fafaf8;
}

.guided-course-summary-grid article > div:first-child {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.guided-course-summary-grid small {
  color: var(--ink-muted);
  font-size: 10px;
}

.guided-stat-pair {
  display: flex;
  gap: 18px;
  margin: 13px 0 10px;
  color: var(--ink-muted);
  font-size: 11px;
}

.guided-stat-pair b {
  color: var(--navy);
}

.mistake-insight-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  margin-top: 17px;
}

.mistake-insight-grid article {
  display: grid;
  grid-template-columns: 10px 1fr;
  gap: 9px;
  padding: 13px;
  border: 1px solid rgba(233, 104, 87, 0.2);
  border-radius: 13px;
  background: #fff8f5;
}

.mistake-insight-grid article > div {
  display: grid;
  gap: 3px;
}

.mistake-insight-grid small,
.mistake-insight-grid em {
  color: var(--ink-muted);
  font-size: 10px;
}

.mistake-insight-grid em {
  color: var(--coral);
  font-style: normal;
  font-weight: 700;
}

.answer-history-heading {
  align-items: flex-end;
}

.history-filters {
  display: flex;
  gap: 6px;
}

.history-filters button,
.show-history-button {
  padding: 8px 10px;
  border: 1px solid var(--line-dark);
  border-radius: 9px;
  background: white;
  font-size: 10px;
  font-weight: 800;
  cursor: pointer;
}

.history-filters button.active {
  border-color: var(--navy);
  background: var(--navy);
  color: white;
}

.attempt-history-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.attempt-history-list article {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 11px;
  padding: 15px;
  border: 1px solid rgba(39, 143, 134, 0.22);
  border-radius: 15px;
  background: #f7fcfa;
}

.attempt-history-list article.wrong {
  border-color: rgba(233, 104, 87, 0.24);
  background: #fff9f6;
}

.attempt-status-icon {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border-radius: 10px;
  background: var(--teal);
  color: white;
}

.attempt-history-list article.wrong .attempt-status-icon {
  background: var(--coral);
}

.attempt-main {
  min-width: 0;
}

.attempt-topline {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--teal);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.attempt-topline small {
  color: var(--ink-muted);
}

.attempt-main h3 {
  margin: 6px 0 11px;
  font-family: var(--font-math);
  font-size: 16px;
  line-height: 1.4;
}

.answer-comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.answer-comparison p {
  display: grid;
  gap: 3px;
  margin: 0;
  padding: 9px 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.8);
}

.answer-comparison span,
.attempt-correction strong {
  color: var(--ink-muted);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.answer-comparison strong {
  overflow-wrap: anywhere;
  font-family: var(--font-math);
  font-size: 14px;
}

.attempt-correction {
  margin-top: 8px;
  padding: 10px;
  border-radius: 10px;
  background: #fff0ec;
}

.attempt-correction p {
  margin: 4px 0 0;
  font-size: 11px;
  line-height: 1.5;
}

.show-history-button {
  display: block;
  margin: 14px auto 0;
}

@media (max-width: 1100px) {
  .course-layout,
  .sf-practice-shell {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 18px;
  }

  .course-section-nav strong {
    font-size: 11px;
  }

  .course-stage-hero {
    align-items: stretch;
    flex-direction: column;
  }

  .course-stage-hero .deadline-card {
    width: 100%;
  }

  .teacher-summary-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 780px) {
  .course-topbar,
  .sf-header {
    grid-template-columns: 1fr auto;
    min-height: 64px;
    padding: 10px 13px;
  }

  .course-topbar > .brand-lockup,
  .sf-header > .brand-lockup {
    display: none;
  }

  .course-sync,
  .header-actions {
    grid-column: 2;
  }

  .header-actions a {
    display: none;
  }

  .admin-preview-banner {
    align-items: flex-start;
    width: calc(100% - 20px);
    margin-top: 9px;
  }

  .admin-preview-banner a {
    display: none;
  }

  .course-layout,
  .sf-practice-shell {
    display: block;
    width: calc(100% - 20px);
    padding-top: 15px;
  }

  .course-rail,
  .sf-practice-rail {
    position: static;
    margin-bottom: 15px;
  }

  .course-section-nav {
    display: flex;
    overflow-x: auto;
    padding: 8px;
    scroll-snap-type: x mandatory;
  }

  .course-section-nav button {
    min-width: 175px;
    scroll-snap-align: start;
  }

  .course-practice-link {
    margin-top: 0;
  }

  .course-stage-hero h1 {
    font-size: 34px;
  }

  .deadline-card.compact {
    min-width: 0;
  }

  .course-panel {
    padding: 18px;
    border-radius: 19px;
  }

  .course-choice-grid,
  .teaching-grid,
  .worked-choice-grid,
  .lesson-memory-grid,
  .theory-summary-grid {
    grid-template-columns: 1fr;
  }

  .course-question-block {
    padding: 16px;
  }

  .diagnostic-result {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .result-orbit {
    width: 118px;
    height: 118px;
    margin: auto;
  }

  .lesson-intro-panel {
    padding-left: 78px;
  }

  .lesson-number-badge {
    width: 61px;
  }

  .course-math,
  .worked-expression {
    padding: 15px 8px;
    font-size: 24px;
  }

  .lesson-complete-banner,
  .theory-ready-card {
    align-items: flex-start;
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .sf-practice-rail {
    display: block;
  }

  .sf-practice-rail .deadline-card,
  .sf-rail-progress {
    margin-bottom: 10px;
  }

  .sf-practice-rail nav {
    display: flex;
    overflow-x: auto;
  }

  .sf-practice-rail nav button {
    min-width: 145px;
  }

  .sf-session-heading {
    align-items: flex-start;
  }

  .sf-answer-builder-fields {
    flex-wrap: wrap;
    padding: 16px;
  }

  .sf-answer-builder-fields input {
    width: 116px;
  }

  .sf-choice-builder,
  .guided-course-summary-grid,
  .mistake-insight-grid,
  .answer-comparison {
    grid-template-columns: 1fr;
  }

  .admin-question-nav {
    flex-wrap: wrap;
  }

  .admin-question-nav .pattern-dots {
    order: 3;
    flex-basis: 100%;
  }

  .teacher-summary-grid {
    grid-template-columns: 1fr 1fr;
  }

  .cumulative-test-heading {
    flex-direction: column;
  }

  .cumulative-test-details {
    grid-template-columns: 1fr 1fr;
  }

  .answer-history-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .attempt-history-list article {
    grid-template-columns: 28px minmax(0, 1fr);
    padding: 12px;
  }
}

/* Quadratics: twenty-level practice */
.quad-practice-page,
.graph-lab-page,
.review-page,
.mixed-test-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 86% 4%, rgba(40, 127, 140, .14), transparent 27rem),
    #f5f4ef;
}
.quad-practice-shell {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  gap: 20px;
  width: min(1220px, 100%);
  margin: 0 auto;
  padding: 24px clamp(16px, 3vw, 34px) 70px;
}
.quad-level-rail {
  position: sticky;
  top: 92px;
  overflow: hidden auto;
  max-height: calc(100vh - 116px);
  align-self: start;
  border: 1px solid var(--line-dark);
  border-radius: 18px;
  background: rgba(255,255,255,.9);
  box-shadow: var(--shadow-sm);
}
.quad-rail-progress { padding: 16px; border-bottom: 1px solid var(--line); }
.quad-rail-progress > span { color: var(--teal); font-size: 9px; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.quad-rail-progress > strong { display: block; margin-top: 4px; font-family: var(--font-math); font-size: 28px; }
.quad-rail-progress > div { overflow: hidden; height: 5px; margin-top: 9px; border-radius: 99px; background: #e7ecea; }
.quad-rail-progress > div span { display: block; height: 100%; border-radius: inherit; background: var(--teal); }
.quad-rail-progress small { display: block; margin-top: 6px; color: var(--ink-muted); font-size: 9px; }
.quad-level-rail nav { display: grid; gap: 3px; padding: 8px; }
.quad-level-rail nav button { display: grid; grid-template-columns: 33px minmax(0,1fr); align-items: center; gap: 8px; min-height: 49px; padding: 7px; border: 0; border-radius: 10px; background: transparent; text-align: left; cursor: pointer; }
.quad-level-rail nav button:hover:not(:disabled),
.quad-level-rail nav button.active { background: #e7f4f2; }
.quad-level-rail nav button:disabled { opacity: .45; cursor: not-allowed; }
.quad-level-rail nav button > span { display: grid; width: 31px; height: 31px; place-items: center; border-radius: 9px; background: #edf1ef; color: var(--ink-muted); font-size: 9px; font-weight: 900; }
.quad-level-rail nav button.active > span { background: var(--teal); color: white; }
.quad-level-rail nav button.passed > span { background: var(--navy); color: white; }
.quad-level-rail nav button > div { display: grid; gap: 1px; min-width: 0; }
.quad-level-rail nav small { color: var(--teal); font-size: 7px; font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
.quad-level-rail nav strong { overflow: hidden; font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.quad-stage { display: grid; gap: 14px; min-width: 0; }
.quad-stage-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; padding: 4px 3px 8px; }
.quad-stage-heading h1 { margin: 5px 0; font-family: var(--font-math); font-size: clamp(30px,4vw,46px); line-height: 1; }
.quad-stage-heading p { max-width: 650px; margin: 0; color: var(--ink-muted); font-size: 12px; }
.quad-question-card { overflow: hidden; border: 1px solid var(--line-dark); border-radius: 22px; background: white; box-shadow: var(--shadow-md); }
.quad-question-card > .question-meta { padding: 12px 20px; border-bottom: 1px solid var(--line); }
.quad-question-copy { padding: 26px clamp(18px,4vw,36px); }
.quad-question-copy > span { display: inline-flex; align-items: center; gap: 6px; color: var(--teal); font-size: 9px; font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
.quad-question-copy h2 { margin: 10px 0 0; font-family: var(--font-math); font-size: clamp(22px,3vw,30px); }
.quad-question-copy .course-math { margin: 20px 0 0; }
.quad-scenario { margin: 14px 0 0; padding: 16px; border-left: 4px solid var(--mango); border-radius: 0 12px 12px 0; background: #fffbef; font-family: var(--font-math); font-size: 18px; line-height: 1.55; }
.quad-question-copy .paper-prompt { margin-top: 18px; }
.quad-builder-card { padding: 24px clamp(16px,4vw,34px) 30px; border-top: 1px solid var(--line); background: #f8faf8; }
.quad-builder-card > .submit-answer { display: flex; margin: 18px auto 0; }
.quad-field { display: grid; gap: 5px; min-width: 88px; }
.quad-field > span { color: var(--ink-muted); font-size: 8px; font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
.quad-field > div { display: flex; align-items: center; gap: 6px; }
.quad-field input { width: 100%; min-width: 72px; max-width: 155px; height: 48px; padding: 9px 10px; border: 1px solid var(--line-dark); border-radius: 10px; background: white; font-family: var(--font-math); font-size: 18px; }
.quad-field strong { color: var(--ink-muted); font-size: 11px; }
.quad-equation-builder,
.quad-factor-builder,
.quad-roots-builder,
.quad-vertex-builder,
.quad-surd-builder { display: flex; align-items: flex-end; justify-content: center; gap: 8px; margin-top: 20px; padding: 20px; border: 2px solid rgba(39,143,134,.2); border-radius: 16px; background: white; }
.quad-equation-builder b,
.quad-factor-builder b,
.quad-vertex-builder > span,
.quad-roots-builder > strong,
.quad-surd-builder > span { padding-bottom: 13px; font-family: var(--font-math); font-size: 18px; }
.quad-factor-builder .quad-field { min-width: 72px; }
.quad-factor-builder .quad-field input { width: 80px; }
.quad-vertex-builder .quad-field input { width: 90px; }
.quad-roots-builder { gap: 18px; }
.quad-roots-builder .quad-field input { width: 180px; }
.quad-parts-grid { display: grid; grid-template-columns: repeat(3,minmax(135px,1fr)); gap: 12px; margin-top: 20px; padding: 20px; border: 2px solid rgba(39,143,134,.2); border-radius: 16px; background: white; }
.quad-parts-grid .quad-field input { max-width: none; }
.quad-choice-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; margin-top: 20px; }
.quad-choice-grid button { display: grid; grid-template-columns: 30px minmax(0,1fr); align-items: center; gap: 9px; min-height: 58px; padding: 10px; border: 1px solid var(--line-dark); border-radius: 12px; background: white; text-align: left; cursor: pointer; }
.quad-choice-grid button > span { display: grid; width: 28px; height: 28px; place-items: center; border-radius: 8px; background: #edf1ef; color: var(--teal); font-size: 9px; font-weight: 900; }
.quad-choice-grid button.selected { border-color: var(--teal); background: #edf8f6; }
.quad-surd-builder { align-items: center; }
.surd-fraction { display: grid; align-items: center; text-align: center; }
.surd-fraction > span { display: flex; align-items: flex-end; justify-content: center; gap: 7px; padding: 7px; }
.surd-fraction > span:first-child { border-bottom: 2px solid var(--navy); }
.surd-fraction .quad-field { min-width: 68px; }
.surd-fraction .quad-field input { width: 82px; }
.graph-launch-builder { display: grid; grid-template-columns: auto minmax(0,1fr) auto; align-items: center; gap: 12px; margin-top: 20px; padding: 17px; border: 1px solid rgba(98,89,201,.25); border-radius: 15px; background: #f0efff; color: #302a78; }
.graph-launch-builder div { display: grid; gap: 3px; }
.graph-launch-builder p { margin: 0; font-size: 10px; line-height: 1.45; }
.graph-launch-builder a { display: inline-flex; align-items: center; gap: 7px; padding: 10px 12px; border-radius: 10px; background: #302a78; color: white; font-size: 10px; font-weight: 850; text-decoration: none; }
.quad-progressive-help { display: grid; gap: 8px; margin-top: 14px; padding: 14px; border: 1px solid #e9ce86; border-radius: 13px; background: #fffbef; }
.quad-progressive-help > strong { color: #98600e; font-size: 10px; text-transform: uppercase; }
.quad-progressive-help p { margin: 0; font-size: 11px; line-height: 1.5; }
.quad-progressive-help > div { display: grid; grid-template-columns: 24px minmax(0,1fr); align-items: start; gap: 8px; font-size: 11px; }
.quad-progressive-help > div span { display: grid; width: 22px; height: 22px; place-items: center; border-radius: 7px; background: var(--mango); font-size: 8px; font-weight: 900; }
.quad-progressive-help button { justify-self: start; padding: 8px 10px; border: 1px solid #d8b668; border-radius: 8px; background: white; cursor: pointer; font-size: 9px; font-weight: 850; }
.quadratic-level-panel { grid-column: 1 / -1; }
.quadratic-level-summary-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 7px; margin-top: 16px; }
.quadratic-level-summary-grid > div { display: grid; grid-template-columns: 31px minmax(0,1fr); align-items: center; gap: 8px; padding: 8px; border: 1px solid var(--line); border-radius: 10px; background: white; }
.quadratic-level-summary-grid > div > span { display: grid; width: 29px; height: 29px; place-items: center; border-radius: 8px; background: #edf1ef; color: var(--teal); font-size: 8px; font-weight: 900; }
.quadratic-level-summary-grid > div.complete > span { background: var(--teal); color: white; }
.quadratic-level-summary-grid strong { display: block; font-size: 9px; }
.quadratic-level-summary-grid small { display: block; margin-top: 2px; color: var(--ink-muted); font-size: 8px; }

/* SVG graph laboratory */
.graph-header > button { display: inline-flex; align-items: center; justify-self: end; gap: 7px; padding: 9px 11px; border: 1px solid var(--line-dark); border-radius: 10px; background: white; cursor: pointer; font-size: 10px; font-weight: 850; }
.graph-lab-shell { width: min(1240px,100%); margin: 0 auto; padding: 25px clamp(14px,3vw,34px) 70px; }
.graph-access-card { display: flex; align-items: flex-start; gap: 16px; width: min(720px, calc(100% - 32px)); margin: clamp(70px, 14vh, 150px) auto; padding: clamp(22px, 5vw, 40px); border: 1px solid var(--line-dark); border-radius: 22px; background: white; box-shadow: var(--shadow-md); }
.graph-access-card > svg { flex: 0 0 auto; color: var(--teal); }
.graph-access-card h1 { margin: 6px 0 9px; font-family: var(--font-math); font-size: clamp(27px, 5vw, 42px); line-height: 1.05; }
.graph-access-card p { margin: 0; color: var(--ink-muted); font-size: 12px; line-height: 1.55; }
.graph-access-card a { display: inline-flex; align-items: center; gap: 7px; margin-top: 18px; padding: 11px 14px; border-radius: 10px; background: var(--navy); color: white; font-size: 10px; font-weight: 850; text-decoration: none; }
.graph-brief { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; }
.graph-brief h1 { margin: 6px 0; font-family: var(--font-math); font-size: clamp(32px,5vw,50px); letter-spacing: -.04em; }
.graph-brief p { max-width: 680px; margin: 0; color: var(--ink-muted); font-size: 12px; }
.graph-equation { padding: 14px 18px; border: 1px solid rgba(39,143,134,.25); border-radius: 14px; background: white; font-family: var(--font-math); font-size: 23px; white-space: nowrap; }
.graph-workspace { display: grid; grid-template-columns: 178px minmax(0,1fr); gap: 12px; margin-top: 20px; padding: 12px; border: 1px solid var(--line-dark); border-radius: 20px; background: #e9eeec; box-shadow: var(--shadow-md); }
.graph-workspace:fullscreen { width: 100vw; height: 100vh; padding: 16px; border-radius: 0; background: #e9eeec; }
.graph-workspace:fullscreen .graph-canvas-wrap { min-height: 0; }
.graph-tools { display: flex; flex-direction: column; gap: 6px; padding: 12px; border-radius: 14px; background: white; }
.graph-tools button { display: flex; align-items: center; gap: 8px; min-height: 40px; padding: 8px 9px; border: 1px solid transparent; border-radius: 9px; background: #f4f6f5; cursor: pointer; font-size: 9px; font-weight: 850; text-align: left; }
.graph-tools button.active { border-color: var(--teal); background: var(--teal); color: white; }
.graph-tools button.clear-graph { margin-top: 7px; border-color: rgba(233,104,87,.25); background: #fff3ef; color: var(--coral); }
.graph-tools small { margin-top: auto; color: var(--ink-muted); font-size: 8px; line-height: 1.45; }
.graph-canvas-wrap { overflow: hidden; min-width: 0; border-radius: 14px; background: white; }
.vector-graph { display: block; width: 100%; height: auto; max-height: 72vh; touch-action: none; user-select: none; }
.vector-graph .graph-grid { stroke: #e5ebe8; stroke-width: .8; }
.vector-graph .graph-axis { stroke: #52656d; stroke-width: 1.6; }
.vector-graph text { fill: #53656d; font-family: var(--font-sans); font-size: 14px; font-weight: 700; paint-order: stroke; stroke: rgba(255, 254, 250, .92); stroke-width: 3px; stroke-linejoin: round; pointer-events: none; }
.student-axis { stroke: #8260a0; stroke-width: 2; stroke-dasharray: 8 6; }
.student-curve { fill: none; stroke: var(--teal); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.reference-curve { fill: none; stroke: var(--mango); stroke-width: 3; stroke-dasharray: 9 7; opacity: .9; }
.student-point { fill: var(--teal); stroke: white; stroke-width: 3; cursor: grab; }
.student-point-hit { fill: transparent; pointer-events: all; cursor: grab; }
.root-point { fill: var(--coral); stroke: white; stroke-width: 3; }
.intercept-point { fill: #6259c9; stroke: white; stroke-width: 3; }
.vertex-mark { fill: none; stroke: #b56c0b; stroke-width: 4; stroke-linecap: round; }
.graph-canvas-footer { display: flex; flex-wrap: wrap; justify-content: center; gap: 7px; padding: 9px; border-top: 1px solid var(--line); background: #fbfcfa; }
.graph-canvas-footer span { display: inline-flex; align-items: center; gap: 5px; padding: 5px 7px; border-radius: 999px; background: #edf5f3; color: #176d65; font-size: 8px; font-weight: 850; }
.graph-submit-panel { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 14px; padding: 18px; border: 1px solid var(--line-dark); border-radius: 17px; background: white; }
.graph-submit-panel h2 { margin: 4px 0; font-family: var(--font-math); font-size: 22px; }
.graph-submit-panel p { margin: 0; color: var(--ink-muted); font-size: 10px; }
.graph-submit-panel button { display: inline-flex; align-items: center; gap: 7px; padding: 11px 14px; border: 0; border-radius: 10px; background: var(--navy); color: white; cursor: pointer; font-size: 10px; font-weight: 850; }
.graph-rubric { margin-top: 14px; padding: 18px; border: 1px solid var(--line-dark); border-radius: 17px; background: white; }
.graph-rubric-heading { display: flex; align-items: center; justify-content: space-between; gap: 15px; }
.graph-rubric h2 { margin: 4px 0 0; font-family: var(--font-math); font-size: 24px; }
.graph-rubric-heading button { padding: 8px 10px; border: 1px solid #d8b668; border-radius: 9px; background: #fffbef; color: #7a4b08; cursor: pointer; font-size: 9px; font-weight: 850; }
.graph-check-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px; margin-top: 14px; }
.graph-check-grid article { display: flex; align-items: flex-start; gap: 9px; padding: 11px; border: 1px solid rgba(39,143,134,.22); border-radius: 11px; background: #f2faf8; }
.graph-check-grid article.retry { border-color: #e9ce86; background: #fffbef; }
.graph-check-grid article > svg { flex: 0 0 auto; color: var(--teal); }
.graph-check-grid article.retry > svg { color: #b56c0b; }
.graph-check-grid strong { display: block; font-size: 10px; }
.graph-check-grid p { margin: 3px 0 0; color: var(--ink-muted); font-size: 9px; line-height: 1.4; }
.graph-perfect { display: flex; align-items: center; gap: 9px; margin-top: 12px; padding: 11px; border-radius: 11px; background: var(--teal); color: white; font-size: 11px; }
.graph-perfect a { margin-left: auto; padding: 8px 10px; border-radius: 8px; background: white; color: #176d65; font-size: 9px; font-weight: 900; text-decoration: none; }

/* Mistake Fixer: spaced, personalised revision */
.review-due-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  justify-self: end;
  padding: 8px 11px;
  border: 1px solid rgba(233, 104, 87, .25);
  border-radius: 999px;
  background: #fff3ef;
  color: #a43d30;
  font-size: 10px;
  font-weight: 900;
}
.review-shell {
  display: grid;
  gap: 20px;
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 28px clamp(15px, 3vw, 34px) 74px;
}
.review-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 24px;
  padding: clamp(20px, 4vw, 38px);
  border: 1px solid var(--line-dark);
  border-radius: 24px;
  background:
    radial-gradient(circle at 90% 12%, rgba(255, 196, 94, .28), transparent 15rem),
    var(--navy);
  color: white;
  box-shadow: var(--shadow-md);
}
.review-hero h1 {
  max-width: 720px;
  margin: 7px 0 8px;
  font-family: var(--font-math);
  font-size: clamp(31px, 5vw, 53px);
  font-weight: 700;
  letter-spacing: -.045em;
  line-height: .99;
}
.review-hero p { max-width: 700px; margin: 0; color: rgba(255, 255, 255, .72); font-size: 12px; line-height: 1.55; }
.review-hero .eyebrow { color: var(--mango); }
.review-spacing-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 4px 9px;
  min-width: 230px;
  padding: 15px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 15px;
  background: rgba(255, 255, 255, .1);
  backdrop-filter: blur(10px);
}
.review-spacing-card svg { grid-row: 1 / 3; color: var(--mango); }
.review-spacing-card strong { font-size: 11px; }
.review-spacing-card span { color: rgba(255,255,255,.68); font-size: 9px; }
.review-session-grid { display: grid; grid-template-columns: 270px minmax(0, 1fr); align-items: start; gap: 18px; }
.review-queue {
  position: sticky;
  top: 104px;
  display: grid;
  gap: 7px;
  padding: 17px;
  border: 1px solid var(--line-dark);
  border-radius: 18px;
  background: rgba(255,255,255,.9);
  box-shadow: var(--shadow-sm);
}
.review-queue h2 { margin: 2px 0 9px; font-family: var(--font-math); font-size: 22px; }
.review-queue > div { display: grid; grid-template-columns: 29px minmax(0,1fr); align-items: center; gap: 9px; padding: 9px; border: 1px solid transparent; border-radius: 11px; }
.review-queue > div.active { border-color: rgba(39,143,134,.25); background: #edf8f6; }
.review-queue > div > span { display: grid; width: 27px; height: 27px; place-items: center; border-radius: 8px; background: #edf1ef; color: var(--ink-muted); font-size: 9px; font-weight: 900; }
.review-queue > div.active > span { background: var(--teal); color: white; }
.review-queue > div > div { display: grid; gap: 2px; min-width: 0; }
.review-queue strong { overflow: hidden; font-size: 9px; text-overflow: ellipsis; white-space: nowrap; }
.review-queue small { color: var(--ink-muted); font-size: 8px; line-height: 1.35; }
.review-question-stage { display: grid; gap: 14px; min-width: 0; }
.review-question-card { overflow: hidden; border: 1px solid var(--line-dark); border-radius: 22px; background: white; box-shadow: var(--shadow-md); }
.review-question-card > .question-meta { padding: 12px 20px; border-bottom: 1px solid var(--line); }
.review-question-copy { padding: clamp(22px, 4vw, 38px); }
.review-question-copy h2 { margin: 9px 0 0; font-family: var(--font-math); font-size: clamp(24px, 4vw, 34px); line-height: 1.15; }
.review-question-copy .course-math { margin-top: 20px; }
.review-builder { display: grid; gap: 14px; padding: 23px clamp(16px, 4vw, 34px) 29px; border-top: 1px solid var(--line); background: #f8faf8; }
.review-builder > label,
.review-root-fields label,
.review-standard-fields label { display: grid; gap: 5px; }
.review-builder label > span { color: var(--ink-muted); font-size: 8px; font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
.review-builder label > input,
.review-root-fields input,
.review-standard-fields input {
  width: 100%;
  height: 50px;
  padding: 9px 12px;
  border: 1px solid var(--line-dark);
  border-radius: 11px;
  background: white;
  color: var(--navy);
  font-family: var(--font-math);
  font-size: 19px;
}
.review-builder > label { max-width: 390px; }
.review-builder > label > b { margin-top: -39px; margin-right: 12px; justify-self: end; color: var(--ink-muted); font-size: 10px; }
.review-root-fields,
.review-standard-fields { display: flex; align-items: flex-end; gap: 11px; max-width: 590px; padding: 17px; border: 2px solid rgba(39,143,134,.18); border-radius: 15px; background: white; }
.review-root-fields label,
.review-standard-fields label { flex: 1 1 0; }
.review-root-fields > strong,
.review-standard-fields > strong { padding-bottom: 15px; color: var(--ink-muted); font-family: var(--font-math); white-space: nowrap; }
.review-builder > .submit-answer { justify-self: start; margin: 0; }
.review-empty,
.review-clear { padding: 28px; border: 1px solid var(--line-dark); border-radius: 19px; background: white; box-shadow: var(--shadow-sm); }
.review-empty { display: flex; align-items: center; justify-content: center; gap: 10px; min-height: 150px; }
.review-empty.error { flex-direction: column; color: var(--coral); text-align: center; }
.review-empty p { margin: 0; color: var(--ink-muted); font-size: 10px; }
.review-clear { display: grid; grid-template-columns: auto minmax(0,1fr) auto; align-items: center; gap: 16px; }
.review-clear > svg { color: var(--teal); }
.review-clear h2 { margin: 3px 0; font-family: var(--font-math); font-size: 25px; }
.review-clear p { margin: 0; color: var(--ink-muted); font-size: 11px; }
.review-clear a { padding: 10px 12px; border-radius: 10px; background: var(--navy); color: white; font-size: 10px; font-weight: 850; text-decoration: none; }

/* Repeat the course-map overrides at the end so they win over legacy flat-list styles. */
.folder-path-list { gap: 6px; margin: 0; padding: 0 9px 9px 54px; }
.folder-path-list .topic-row { min-height: 57px; padding: 8px 10px; border-radius: 11px; }

@media (max-width: 940px) {
  .working-levels-home .working-level-list { grid-template-columns: 1fr; }
  .quad-practice-shell { display: block; }
  .quad-level-rail { position: static; max-height: none; margin-bottom: 16px; }
  .quad-level-rail nav { display: flex; overflow-x: auto; scroll-snap-type: x proximity; }
  .quad-level-rail nav button { min-width: 145px; scroll-snap-align: start; }
  .quad-rail-progress { display: grid; grid-template-columns: 1fr auto; align-items: center; }
  .quad-rail-progress > div,
  .quad-rail-progress small { grid-column: 1 / -1; }
  .quadratic-level-summary-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .graph-workspace { grid-template-columns: 1fr; }
  .graph-tools { display: grid; grid-template-columns: repeat(5,minmax(110px,1fr)); overflow-x: auto; }
  .graph-tools > .eyebrow,
  .graph-tools > small { grid-column: 1 / -1; }
  .graph-tools button.clear-graph { margin: 0; }
  .review-session-grid { grid-template-columns: 1fr; }
  .review-queue { position: static; }
  .review-queue > div:not(.active) { display: none; }
}

@media (max-width: 650px) {
  .quad-stage-heading,
  .graph-brief,
  .graph-submit-panel { align-items: flex-start; flex-direction: column; }
  .quad-stage-heading .level-score { align-self: stretch; }
  .quad-question-copy { padding: 20px 15px; }
  .quad-builder-card { padding: 18px 12px 22px; }
  .quad-equation-builder,
  .quad-factor-builder,
  .quad-roots-builder,
  .quad-vertex-builder,
  .quad-surd-builder { overflow-x: auto; justify-content: flex-start; padding: 14px; }
  .quad-parts-grid,
  .quad-choice-grid { grid-template-columns: 1fr; }
  .graph-launch-builder { grid-template-columns: auto minmax(0,1fr); }
  .graph-launch-builder a { grid-column: 1 / -1; justify-content: center; }
  .quadratic-level-summary-grid { grid-template-columns: 1fr 1fr; }
  .graph-lab-shell { padding-inline: 9px; }
  .graph-brief { padding-inline: 7px; }
  .graph-equation { font-size: 18px; }
  .graph-workspace { padding: 6px; }
  .graph-tools { grid-template-columns: repeat(5,118px); padding: 8px; }
  .graph-check-grid { grid-template-columns: 1fr; }
  .graph-rubric-heading { align-items: flex-start; flex-direction: column; }
  .review-header { grid-template-columns: 1fr auto; }
  .review-header .brand-lockup { display: none; }
  .review-hero { grid-template-columns: 1fr; }
  .review-spacing-card { min-width: 0; }
  .review-shell { padding-inline: 9px; }
  .review-root-fields,
  .review-standard-fields { align-items: stretch; flex-direction: column; }
  .review-root-fields > strong,
  .review-standard-fields > strong { padding: 0; text-align: center; }
  .review-clear { grid-template-columns: auto minmax(0,1fr); }
  .review-clear a { grid-column: 1 / -1; text-align: center; }
  .vector-graph { min-height: 410px; object-fit: contain; }
  .vector-graph text { font-size: 20px; }
  .test-readiness-list,
  .teacher-test-paper-grid { grid-template-columns: 1fr; }
  .chapter-folder-body { padding-left: 9px; }
  .folder-path-list { padding-left: 9px; }
  .folder-path-list .topic-row { grid-template-columns: auto minmax(0,1fr) auto; }
  .folder-path-list .topic-progress { display: none; }
  .folder-path-list .topic-arrow { grid-column: 3; }
}

@media (orientation: landscape) and (max-height: 620px) {
  .graph-workspace:fullscreen { grid-template-columns: 155px minmax(0,1fr); }
  .graph-workspace:fullscreen .graph-tools { display: flex; overflow: visible; }
  .graph-workspace:fullscreen .vector-graph { height: calc(100vh - 48px); width: 100%; }
}