:root{
  --navy:#12355B;
  --navy-2:#0d2948;
  --teal:#0B7A75;
  --gold:#D89B20;
  --red:#C8102E;
  --bg:#F7F8FA;
  --surface:#FFFFFF;
  --surface-2:#EEF2F6;
  --text:#152235;
  --muted:#667085;
  --border:#D9E0E7;
  --success:#147D64;
  --danger:#B42318;
  --warning:#B54708;
  --shadow:0 8px 26px rgba(18,53,91,.08);
  --radius:14px;
  --focus:0 0 0 3px rgba(11,122,117,.28);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Tahoma,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.55}
body.dark{--bg:#0F1722;--surface:#182231;--surface-2:#243143;--text:#F2F5F8;--muted:#B3BFCC;--border:#334257;--shadow:0 8px 26px rgba(0,0,0,.25)}
button,input,textarea{font:inherit}
button{cursor:pointer}
button:focus-visible,input:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:none;box-shadow:var(--focus)}
.skip-link{position:fixed;left:12px;top:-60px;z-index:1000;background:#fff;color:#111;padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}
.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}
.app-shell{display:grid;grid-template-columns:260px 1fr;min-height:100vh}
.sidebar{background:var(--navy);color:#fff;padding:20px 16px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:22px;z-index:30}
.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:44px;height:44px;border-radius:12px;background:#fff;color:var(--navy);display:grid;place-items:center;font-weight:800}.brand small{display:block;opacity:.75;margin-top:2px}
.nav-list{display:grid;gap:6px}.nav-item,.bottom-item{border:0;background:transparent;color:inherit;text-align:left}.nav-item{padding:11px 12px;border-radius:10px;display:flex;gap:10px;align-items:center}.nav-item:hover,.nav-item.active{background:rgba(255,255,255,.14)}
.sidebar-footer{margin-top:auto;display:grid;gap:8px}.secondary-btn,.primary-btn,.ghost-btn,.danger-btn{border-radius:10px;padding:10px 14px;min-height:44px;border:1px solid var(--border);font-weight:700}.primary-btn{background:var(--navy);border-color:var(--navy);color:#fff}.secondary-btn{background:var(--surface);color:var(--text)}.ghost-btn{background:transparent;color:var(--text)}.danger-btn{background:#fff0ee;border-color:#f6c4be;color:var(--danger)}
.sidebar .secondary-btn{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.18);color:#fff}
.page-column{min-width:0}.topbar{height:72px;display:flex;align-items:center;gap:16px;padding:0 24px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}.search-wrap{flex:1;max-width:760px;position:relative}.search-wrap input{width:100%;padding:11px 14px;border-radius:10px;border:1px solid var(--border);background:var(--bg);color:var(--text)}.search-results{position:absolute;top:48px;left:0;right:0;background:var(--surface);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);padding:8px;max-height:360px;overflow:auto}.search-hit{padding:10px;border-radius:9px}.search-hit:hover{background:var(--surface-2)}
.top-actions{display:flex;gap:8px;align-items:center}.offline-badge{background:#fff3cd;color:#7a4b00;padding:6px 10px;border-radius:999px;font-weight:700;font-size:14px}
.icon-btn{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:10px;padding:9px 12px}
main{padding:28px;max-width:1300px;width:100%;margin:0 auto}
.eyebrow{font-weight:800;color:var(--teal);text-transform:uppercase;letter-spacing:.08em;font-size:13px}.hero{display:grid;grid-template-columns:1.4fr .6fr;gap:22px;align-items:stretch;margin-bottom:24px}.hero-card,.card,.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.hero-card{padding:26px}.hero h1{font-size:clamp(28px,4vw,44px);line-height:1.12;margin:8px 0}.muted{color:var(--muted)}
.continue-card{padding:22px;background:linear-gradient(135deg,var(--navy),#1c5b8f);color:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}.continue-card .primary-btn{background:#fff;color:var(--navy);border-color:#fff}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:12px;margin:28px 0 14px}.section-head h2{margin:0;font-size:24px}.grid{display:grid;gap:16px}.grid.units{grid-template-columns:repeat(4,minmax(0,1fr))}.unit-card{padding:18px;min-height:225px;display:flex;flex-direction:column}.unit-icon{font-size:34px}.unit-card h3{margin:12px 0 4px}.unit-card p{margin:0;color:var(--muted)}.unit-card .unit-actions{margin-top:auto;padding-top:18px}.progress-track{height:9px;background:var(--surface-2);border-radius:999px;overflow:hidden}.progress-fill{height:100%;background:var(--teal);border-radius:inherit}.metric-row{display:flex;justify-content:space-between;gap:12px;font-size:14px;margin:8px 0}
.quick-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.quick-card{padding:18px}.quick-card h3{margin:8px 0}.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 9px;border-radius:999px;background:var(--surface-2);font-size:13px;font-weight:700}.badge.success{background:#e9f7f2;color:#0d6b55}.badge.warning{background:#fff4e5;color:#914f00}
.page-title{margin:0 0 8px}.breadcrumbs{font-size:14px;color:var(--muted);margin-bottom:16px}.unit-hero{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center;padding:24px}.learning-path{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.lesson-card{padding:16px}.lesson-card button{width:100%;margin-top:10px}.lesson-card.current{border-color:var(--teal);box-shadow:0 0 0 2px rgba(11,122,117,.12)}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}.tab-btn{padding:9px 12px;border-radius:999px;border:1px solid var(--border);background:var(--surface);color:var(--text)}.tab-btn.active{background:var(--navy);border-color:var(--navy);color:#fff}.content-card{padding:22px}.vocab-card{max-width:680px;margin:18px auto;text-align:center;padding:30px}.word{font-size:38px;font-weight:800}.arabic{font-size:24px;direction:rtl}.example{background:var(--surface-2);padding:14px;border-radius:10px;margin-top:16px}.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.center{justify-content:center}.question-card{padding:22px;max-width:760px}.question-card h3{margin-top:0}.option-list{display:grid;gap:10px;margin:18px 0}.option{display:block;width:100%;text-align:left;padding:13px 14px;border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--text)}.option:hover{background:var(--surface-2)}.option.selected{border-color:var(--teal);box-shadow:0 0 0 2px rgba(11,122,117,.1)}.option.correct{border-color:var(--success);background:#eaf8f3;color:#125d4c}.option.wrong{border-color:var(--danger);background:#fff0ee;color:#8d2118}.feedback{margin-top:14px;padding:14px;border-radius:10px;background:var(--surface-2)}.feedback.good{border-left:4px solid var(--success)}.feedback.bad{border-left:4px solid var(--danger)}
.rule-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.rule-box{padding:15px;background:var(--surface-2);border-radius:10px}.mistake{padding:14px;border:1px solid var(--border);border-radius:10px;margin-top:10px}.wrong-text{color:var(--danger)}.right-text{color:var(--success)}
.reading-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px}.reading-text{padding:22px}.reading-text p{font-size:17px}.strategy{padding:12px;border-left:4px solid var(--gold);background:#fff7e6;border-radius:8px;color:#604200}.dark .strategy{background:#3c3017;color:#ffe6a3}
.audio-panel{padding:22px}.audio-controls{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.audio-status{font-weight:700;color:var(--teal)}
.timer{font-size:52px;font-weight:800;letter-spacing:.04em}.prompt-box{padding:20px;background:var(--surface-2);border-radius:12px}.recording{color:var(--red);font-weight:800}.writing-area{width:100%;min-height:260px;padding:14px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--text);resize:vertical}.planner-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.planner-grid textarea{min-height:90px}
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.stat{padding:18px}.stat strong{display:block;font-size:28px}.skill-row{display:grid;grid-template-columns:140px 1fr 60px;gap:12px;align-items:center;margin:12px 0}.test-nav{display:grid;grid-template-columns:repeat(10,1fr);gap:6px;margin:14px 0}.test-nav button{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:8px;padding:8px 0}.test-nav button.done{background:#e9f7f2;border-color:#b3dfd2}.test-nav button.flagged{background:#fff4e5;border-color:#efd199}.test-nav button.current{border-color:var(--navy);box-shadow:0 0 0 2px rgba(18,53,91,.15)}
.toast{position:fixed;right:20px;bottom:20px;z-index:100;background:#101828;color:#fff;padding:12px 16px;border-radius:10px;box-shadow:var(--shadow);opacity:0;transform:translateY(20px);pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:none}
.bottom-nav{display:none}.mobile-only{display:none}
.print-only{display:none}
@media(max-width:1050px){.grid.units{grid-template-columns:repeat(2,minmax(0,1fr))}.quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{grid-template-columns:1fr}.learning-path{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.app-shell{display:block}.sidebar{position:fixed;left:-280px;width:260px;transition:.2s}.sidebar.open{left:0}.page-column{padding-bottom:70px}.topbar{height:auto;min-height:64px;padding:10px 12px}.mobile-only{display:inline-flex}.top-actions{display:none}main{padding:18px 14px}.grid.units,.quick-grid,.learning-path,.rule-grid,.reading-layout,.planner-grid,.stat-grid{grid-template-columns:1fr}.bottom-nav{position:fixed;display:grid;grid-template-columns:repeat(5,1fr);bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--border);z-index:25}.bottom-item{padding:8px 3px;color:var(--muted);display:grid;place-items:center;font-size:18px}.bottom-item span{font-size:10px}.bottom-item.active{color:var(--navy);font-weight:800}.unit-hero{grid-template-columns:1fr}.skill-row{grid-template-columns:100px 1fr 46px}.test-nav{grid-template-columns:repeat(5,1fr)}.word{font-size:34px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
@media print{.sidebar,.topbar,.bottom-nav,.no-print,.toast,.button-row,.tabs{display:none!important}.app-shell{display:block}.page-column{padding:0}main{padding:0;max-width:none}.card,.panel,.hero-card{box-shadow:none;border:1px solid #aaa}.print-only{display:block}@page{size:A4;margin:16mm}body{background:#fff;color:#000}.reading-layout{grid-template-columns:1fr}.unit-card{break-inside:avoid}}
.small-ar{font-size:16px;margin-top:8px}
.pron-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.pron-card{display:grid;gap:6px;text-align:left;padding:16px;border:1px solid var(--border);border-radius:12px;background:var(--surface);color:var(--text)}.pron-card:hover,.pron-card:focus-visible{border-color:var(--teal);box-shadow:0 0 0 2px rgba(11,122,117,.12)}.pron-card span{color:var(--teal);font-weight:800}.pron-card small{color:var(--muted)}
.chart-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.chart-row{display:grid;grid-template-columns:110px 1fr 48px;gap:10px;align-items:center;margin:11px 0}.bar-track{height:18px;background:var(--surface-2);border-radius:999px;overflow:hidden}.bar-fill{height:100%;background:var(--teal);border-radius:inherit}.word-ok{color:var(--success)}
.project-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.check-list{list-style:none;padding:0}.check-list li{padding:9px 0;border-bottom:1px solid var(--border)}.check-list input{width:18px;height:18px;vertical-align:middle;margin-right:8px}
@media(max-width:900px){.pron-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.project-grid,.chart-grid{grid-template-columns:1fr}}
@media(max-width:520px){.pron-grid{grid-template-columns:1fr}.chart-row{grid-template-columns:92px 1fr 42px}}

/* v0.4 interactive learning components */
.sort-source{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;margin:18px 0}.sort-card{padding:16px;min-height:128px;display:flex;flex-direction:column;justify-content:space-between}.sort-card[draggable="true"]{cursor:grab}.sort-card:active{cursor:grabbing}.compact{min-height:44px;padding:10px 12px}.sort-zones{display:grid;grid-template-columns:1fr 1fr;gap:16px}.drop-zone{min-height:220px;border:2px dashed var(--border);border-radius:16px;padding:18px;background:var(--surface-2);transition:border-color .18s ease,background .18s ease}.drop-zone.drag-over{border-color:var(--teal);background:rgba(11,122,117,.08)}.sort-list{display:grid;gap:8px;margin-top:10px}.sort-chip{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:var(--surface)}.sort-chip.is-correct{border-inline-start:4px solid var(--success)}.chip-remove{min-width:44px;min-height:44px;border:0;border-radius:8px;background:var(--surface-2);color:var(--text);font-size:22px}.explain-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px;margin-top:14px}.explain-grid details{border:1px solid var(--border);border-radius:10px;padding:10px;background:var(--surface)}
.word-builder-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;margin:18px 0}.word-builder-card{padding:18px;display:grid;grid-template-columns:auto auto auto auto 1fr;gap:8px;align-items:center}.root-word,.suffix{padding:7px 9px;border-radius:8px;background:var(--surface-2)}.arabic-inline{grid-column:1/-1;direction:rtl;color:var(--muted)}
.register-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;margin:18px 0}.register-card{padding:18px}.register-row{padding:12px;border-radius:10px}.register-row.informal{background:var(--surface-2)}.register-row.formal{border:1px solid var(--border);background:var(--surface)}.register-row p{margin-bottom:0}.register-arrow{text-align:center;font-size:22px;color:var(--muted);padding:4px}
@media (max-width:720px){.sort-zones{grid-template-columns:1fr}.word-builder-card{grid-template-columns:auto auto auto auto 1fr}.drop-zone{min-height:160px}}
@media (prefers-reduced-motion:reduce){.drop-zone{transition:none}}

/* v0.5 Civilisation + Explainable Smart Learning */
.degree-scale{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:18px 0}.degree-card{padding:18px}.timeline-list{display:grid;gap:10px}.timeline-item{display:grid;grid-template-columns:48px 1fr auto;gap:12px;align-items:center;padding:12px;border:1px solid var(--border);border-radius:12px;background:var(--surface)}.timeline-rank,.smart-number{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--navy);color:#fff;font-weight:800}.timeline-actions{display:flex;gap:6px}.biography-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.builder-field{padding:16px;display:grid;gap:10px}.builder-field textarea{min-height:100px;border:1px solid var(--border);border-radius:10px;padding:12px;background:var(--surface);color:var(--text);resize:vertical}.smart-hero{padding:26px;background:linear-gradient(135deg,var(--surface),var(--surface-2))}.smart-path{display:grid;gap:12px}.smart-rec{padding:18px;display:grid;grid-template-columns:52px 1fr;gap:14px;align-items:start}.evidence-chip{display:inline-flex;margin:6px 0;padding:7px 10px;border-radius:9px;background:rgba(11,122,117,.1);color:var(--teal);font-weight:750}.smart-inline{margin-top:18px;padding:20px;display:flex;align-items:center;justify-content:space-between;gap:18px}.smart-card{border-color:rgba(11,122,117,.35)}
@media(max-width:760px){.degree-scale,.biography-grid{grid-template-columns:1fr}.smart-inline{display:block}.smart-inline button{width:100%;margin-top:12px}.timeline-item{grid-template-columns:42px 1fr}.timeline-actions{grid-column:2;justify-content:flex-start}}


/* v0.6 Assessment Intelligence */
.exam-command{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(260px,.7fr);gap:16px;margin:20px 0}.exam-sim-card,.readiness-mini,.readiness-hero,.result-hero{padding:24px}.exam-spec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:18px 0}.exam-spec-grid div{padding:14px;border:1px solid var(--border);border-radius:12px;background:var(--surface-2);display:grid}.exam-spec-grid strong{font-size:28px}.exam-spec-grid span{font-size:12px;color:var(--muted)}.readiness-ring{--score:0;width:150px;aspect-ratio:1;border-radius:50%;display:grid;place-items:center;align-content:center;margin:12px auto;background:conic-gradient(var(--teal) calc(var(--score)*1%),var(--surface-2) 0);position:relative}.readiness-ring:before{content:"";position:absolute;inset:12px;border-radius:50%;background:var(--surface)}.readiness-ring strong,.readiness-ring span{position:relative;z-index:1}.readiness-ring strong{font-size:38px}.readiness-ring.large{width:190px}.readiness-ring.large strong{font-size:50px}.readiness-hero{display:grid;grid-template-columns:1fr auto;align-items:center;gap:24px}.readiness-factors{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.factor-card{padding:18px}.exam-sticky{position:sticky;top:76px;z-index:10;display:grid;grid-template-columns:1fr auto auto;gap:16px;align-items:center;padding:12px 16px;margin-bottom:14px}.exam-clock{font-variant-numeric:tabular-nums;font-size:26px;font-weight:850;padding:8px 12px;border-radius:10px;background:var(--surface-2)}.semester-question{margin:18px auto}.exam-dialog{width:min(720px,92vw);border:1px solid var(--border);border-radius:16px;background:var(--surface);color:var(--text);padding:20px;box-shadow:var(--shadow)}.exam-dialog::backdrop{background:rgba(10,20,35,.55)}.writing-exam{margin:16px 0}.result-hero{text-align:center}.result-percent{font-size:58px;font-weight:900;margin:8px 0;color:var(--teal)}.literature-note{margin-top:18px;border-inline-start:4px solid var(--gold)}.readiness-card{border-color:rgba(216,155,32,.4)}.readiness-inline{border-inline-start:4px solid var(--gold)}
@media(max-width:760px){.exam-command,.readiness-factors,.readiness-hero{grid-template-columns:1fr}.exam-spec-grid{grid-template-columns:repeat(2,1fr)}.exam-sticky{top:64px;grid-template-columns:1fr auto}.exam-sticky button{grid-column:1/-1}.readiness-ring.large{width:160px}}
@media print{.exam-sticky,.exam-dialog{display:none!important}.result-hero{border:1px solid #aaa}.readiness-ring{background:none;border:8px solid #888}}

/* v0.7 Retrieval Practice & Literature Centre */
.revision-hero{padding:26px;display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}.revision-score{min-width:130px;text-align:center;padding:16px;border-radius:18px;background:var(--surface-2);border:1px solid var(--border)}.revision-score span,.revision-score small{display:block;color:var(--muted)}.revision-score strong{font-size:52px;line-height:1}.segmented{display:flex;gap:8px;flex-wrap:wrap}.segmented button,.mode-card{border:1px solid var(--border);background:var(--surface-2);color:var(--text);border-radius:12px;padding:12px 16px;cursor:pointer}.segmented button.active,.mode-card.active{border-color:var(--teal);box-shadow:0 0 0 2px color-mix(in srgb,var(--teal) 20%,transparent)}.mode-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.mode-card{display:grid;text-align:start;min-height:78px}.mode-card span{font-size:12px;color:var(--muted)}.session-top{display:flex;justify-content:space-between;align-items:end;gap:12px;margin:14px 0}.literature-hero{padding:28px;border-inline-start:5px solid var(--gold)}.literature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:18px 0}.lit-module{padding:20px}.lit-module>span{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--surface-2);font-weight:800;color:var(--teal)}.exam-tools{margin-top:18px}
@media(max-width:760px){.revision-hero,.literature-grid{grid-template-columns:1fr}.mode-cards{grid-template-columns:1fr}.revision-score{min-width:0}.session-top{align-items:center}}

/* v0.8 Teacher Mode */
.teacher-hero{padding:26px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:24px;border-inline-start:5px solid var(--teal)}.teacher-bank-stat{display:grid;place-items:center;text-align:center;padding:18px 24px;border-radius:18px;background:var(--surface-2);border:1px solid var(--border)}.teacher-bank-stat strong{font-size:46px;line-height:1}.teacher-bank-stat span{font-size:12px;color:var(--muted)}.teacher-builder-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:16px;margin:18px 0}.teacher-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:14px 0}.field-label{display:grid;gap:6px;font-weight:700}.text-input{width:100%;min-height:46px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--text);padding:10px 12px;font:inherit}.teacher-blueprint{display:grid;grid-template-columns:repeat(auto-fit,minmax(100px,1fr));gap:10px;margin:14px 0}.teacher-blueprint>div{display:grid;text-align:center;padding:14px;border:1px solid var(--border);border-radius:12px;background:var(--surface-2)}.teacher-blueprint strong{font-size:28px}.teacher-blueprint span{font-size:12px;color:var(--muted)}.session-code-box{display:flex;justify-content:space-between;gap:16px;align-items:center;padding:16px;border:1px dashed var(--teal);border-radius:14px;margin:16px 0;background:color-mix(in srgb,var(--teal) 6%,var(--surface))}.session-code-box strong{font-size:24px;letter-spacing:.08em}.paper-sheet{max-width:900px;margin:18px auto;background:#fff;color:#111;padding:32px 38px;border:1px solid #ddd;border-radius:10px;box-shadow:var(--shadow)}.paper-header{display:flex;justify-content:space-between;gap:20px;border-bottom:2px solid #111;padding-bottom:14px;margin-bottom:18px}.paper-header h1{margin:0}.paper-code{font-weight:800;letter-spacing:.08em}.student-fields{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;margin:16px 0 24px}.paper-questions{padding-inline-start:24px}.paper-question{padding:10px 0 18px}.paper-options{display:grid;gap:7px;margin:10px 0 0}.paper-correct{font-weight:800;text-decoration:underline}.paper-explain{font-size:14px;background:#f5f5f5;padding:10px;border-radius:8px}.paper-footer{border-top:1px solid #bbb;margin-top:24px;padding-top:10px;font-size:12px}.teacher-preview-actions{justify-content:center;margin:18px 0}.teacher-card{border-color:color-mix(in srgb,var(--teal) 35%,var(--border))}
@media(max-width:760px){.teacher-hero,.teacher-builder-grid,.teacher-form-grid{grid-template-columns:1fr}.session-code-box,.paper-header{align-items:flex-start;flex-direction:column}.paper-sheet{padding:22px 18px}.student-fields{display:grid}}
@media print{body.teacher-printing *{visibility:hidden!important}body.teacher-printing .paper-sheet,body.teacher-printing .paper-sheet *{visibility:visible!important}body.teacher-printing .paper-sheet{position:absolute;inset:0;max-width:none;width:100%;margin:0;padding:12mm;box-shadow:none;border:none;border-radius:0}body.teacher-printing .paper-question{break-inside:avoid}body.teacher-printing .paper-header{break-inside:avoid}body.teacher-printing .no-print,body.teacher-printing .sidebar,body.teacher-printing .topbar,body.teacher-printing .bottom-nav{display:none!important}@page{size:A4;margin:12mm}}

/* v0.8.2 Stable Print & PDF Centre */
.print-preview-shell{margin-top:20px}.print-preview-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:12px}.print-preview-toolbar h2{margin:2px 0 0}.print-resource{background:#fff;color:#111;border:1px solid var(--border);border-radius:14px;min-height:420px;padding:28px;box-shadow:var(--shadow)}.print-empty-state{min-height:360px;display:grid;place-items:center;align-content:center;text-align:center;color:#667085}.print-empty-state strong{font-size:24px}.print-doc{max-width:900px;margin:0 auto}.print-doc-head{border-bottom:2px solid #111;padding-bottom:12px;margin-bottom:18px}.print-doc-head h1{margin:0 0 6px}.print-table{width:100%;border-collapse:collapse;font-size:14px}.print-table th,.print-table td{border:1px solid #bbb;padding:8px;vertical-align:top;text-align:start}.print-table th{background:#f2f2f2}.print-section{margin:18px 0}.print-mistake{border-inline-start:4px solid #999;padding:8px 12px;margin:10px 0;background:#f7f7f7}.print-mistake p{margin:4px 0}.print-prompt{border:1px solid #aaa;padding:12px;margin:12px 0;background:#f7f7f7}.planning-line{margin:14px 0}.write-line{height:34px;border-bottom:1px solid #999}.writing-box-print{height:420px;border:1px solid #999;background:repeating-linear-gradient(to bottom,#fff 0,#fff 31px,#ddd 32px)}.print-preview-toolbar button:disabled{opacity:.45;cursor:not-allowed}
@media(max-width:760px){.print-preview-toolbar{align-items:flex-start;flex-direction:column}.print-resource{padding:16px;overflow-x:auto}.print-table{min-width:680px}}
@media print{
  body.print-centre-printing *{visibility:hidden!important}
  body.print-centre-printing .print-resource,body.print-centre-printing .print-resource *{visibility:visible!important}
  body.print-centre-printing .print-resource{position:absolute;left:0;top:0;width:100%;min-height:auto;padding:0;border:0;border-radius:0;box-shadow:none;background:#fff;color:#000}
  body.print-centre-printing .print-doc{max-width:none}
  body.print-centre-printing .print-table th{background:#eee!important;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  body.print-centre-printing .print-table tr,body.print-centre-printing .print-section,body.print-centre-printing .planning-line{break-inside:avoid}
  @page{size:A4;margin:14mm}
}

/* v0.9 Classroom Architecture v1 */
.classroom-card{border-color:color-mix(in srgb,var(--teal) 36%,var(--border))}.classroom-hero{padding:26px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:center;border-inline-start:5px solid var(--teal)}.classroom-flow{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.classroom-flow span{padding:9px 12px;border-radius:999px;background:var(--surface-2);border:1px solid var(--border);font-weight:750}.classroom-flow b{color:var(--teal)}.classroom-profile-bar{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:18px 22px;margin-bottom:16px}.classroom-profile-bar h2{margin:2px 0 0}.profile-list{display:flex;gap:10px;flex-wrap:wrap}.profile-chip{display:grid;gap:2px;min-width:150px;text-align:start;border:1px solid var(--border);border-radius:12px;padding:12px;background:var(--surface-2);color:var(--text);cursor:pointer}.profile-chip span{font-size:12px;color:var(--muted)}.classroom-note{margin-top:16px;border-inline-start:4px solid var(--gold)}.classroom-builder{align-items:start}.class-card{padding:20px}.class-code{display:inline-block;font-size:20px;font-weight:900;letter-spacing:.12em;padding:8px 10px;border-radius:10px;background:var(--surface-2);border:1px dashed var(--teal)}.class-meta,.assignment-meta{display:flex;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:13px;margin:12px 0}.student-mini-list{display:flex;gap:6px;flex-wrap:wrap}.student-mini-list span{padding:5px 8px;border-radius:999px;background:var(--surface-2);font-size:12px}.assignment-mini-list{display:grid;gap:8px;margin-top:14px}.assignment-mini-list>div{display:flex;justify-content:space-between;gap:12px;padding-top:8px;border-top:1px solid var(--border)}.assignment-mini-list span{font-size:12px;color:var(--muted)}.join-class-card{margin:16px 0}.join-code-row{display:grid;grid-template-columns:minmax(0,280px) auto;gap:10px;align-items:end}.class-code-input{text-transform:uppercase;letter-spacing:.14em;font-weight:800;font-size:18px}.assignment-list{display:grid;gap:12px}.assignment-card{padding:20px;display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center}.assignment-card.assignment-done{border-inline-start:4px solid var(--teal)}.assignment-card h3{margin:4px 0}.assignment-card p{margin:6px 0;color:var(--muted)}.assignment-actions{display:grid;gap:8px;min-width:150px}@media(max-width:760px){.classroom-hero{grid-template-columns:1fr}.classroom-profile-bar,.assignment-card{display:grid;grid-template-columns:1fr}.join-code-row{grid-template-columns:1fr}.assignment-actions{min-width:0}.assignment-mini-list>div{display:grid}}


/* v0.9.1 Classroom Privacy & Role Separation */
.privacy-badge,.session-role-badge{display:inline-flex;align-items:center;gap:6px;padding:8px 11px;border-radius:999px;background:var(--surface-2);border:1px solid var(--border);font-size:12px;font-weight:800}
.profile-sections{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:16px}.teacher-profile-chip{border-color:color-mix(in srgb,var(--gold) 45%,var(--border))}
.classroom-login-card,.teacher-access-gate{max-width:560px;margin:28px auto;padding:28px;text-align:center}.classroom-login-card .field-label{text-align:start;max-width:300px;margin:18px auto}.classroom-login-card .button-row,.teacher-access-gate .button-row{justify-content:center}.access-lock{font-size:48px;margin-bottom:8px}.pin-input{font-size:24px;letter-spacing:.2em;text-align:center}.privacy-small{font-size:12px;margin-top:16px}
.privacy-strip{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:11px 14px;margin:0 0 16px;border-radius:12px;background:color-mix(in srgb,var(--gold) 8%,var(--surface));border:1px solid color-mix(in srgb,var(--gold) 34%,var(--border))}.privacy-strip span{color:var(--muted);font-size:13px}.student-privacy-strip{background:color-mix(in srgb,var(--teal) 7%,var(--surface));border-color:color-mix(in srgb,var(--teal) 30%,var(--border))}
@media(max-width:760px){.profile-sections{grid-template-columns:1fr}.classroom-login-card,.teacher-access-gate{padding:20px}}