:root{--green:#0b6b57;--green2:#19a77f;--ink:#17352e;--muted:#6b7c76;--bg:#f5faf7;--card:#fff;--line:#dce9e4;--gold:#f8c84a;--danger:#d94b4b;--shadow:0 10px 30px #0b6b5712}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg)}button,input,select,textarea{font:inherit}button{cursor:pointer}.topbar{height:70px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:14px;padding:0 20px;position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:9px;color:var(--green);font-weight:900;font-size:22px;text-decoration:none}.brand img{width:38px;height:38px}.iconbtn{border:0;background:transparent;font-size:24px}.top-search{flex:1;max-width:680px;margin:auto;position:relative}.top-search input{width:100%;border:1px solid var(--line);background:#f6faf8;border-radius:16px;padding:13px 42px 13px 16px;outline:none}.top-search input:focus{border-color:var(--green2);box-shadow:0 0 0 3px #19a77f18}.clear-search{position:absolute;right:8px;top:6px;border:0;background:transparent;color:#789;font-size:25px;display:none}.profile-chip{border:1px solid var(--line);background:#fff;padding:9px 13px;border-radius:14px;color:var(--ink)}.layout{display:flex;min-height:calc(100vh - 70px)}.sidebar{width:250px;background:#fff;border-right:1px solid var(--line);padding:18px 12px;display:flex;flex-direction:column}.nav{display:flex;gap:12px;padding:12px 14px;margin:2px 0;color:#49635b;text-decoration:none;border-radius:12px;font-weight:650}.nav:hover,.nav.active{background:#e9f7f2;color:var(--green)}.offline{margin-top:auto;padding:12px;border-radius:12px;background:#f5faf7;font-size:12px;display:flex;gap:8px;align-items:center}.offline span:first-child{width:9px;height:9px;border-radius:50%;background:#f1a33b}.side-foot{text-align:center;color:#8a9994;font-size:12px;padding:18px 4px}.main{flex:1;max-width:1450px;margin:auto;padding:28px}.hero{background:linear-gradient(135deg,#0b6b57,#19a77f);color:#fff;border-radius:26px;padding:30px;display:flex;justify-content:space-between;gap:25px;box-shadow:var(--shadow)}.hero h1{font-size:34px;margin:0 0 8px}.hero p{opacity:.9;max-width:700px}.hero-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.btn{border:0;border-radius:12px;padding:11px 16px;background:var(--green);color:#fff;font-weight:750}.btn.light{background:#fff;color:var(--green)}.btn.outline{background:transparent;border:1px solid var(--line);color:var(--ink)}.btn.danger{background:var(--danger)}.section{margin:28px 0}.section-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.section h2{margin:0 0 14px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 6px 20px #0b6b5708}.card h3{margin:8px 0}.card p{color:var(--muted);line-height:1.55}.pill{display:inline-block;background:#e9f7f2;color:var(--green);padding:5px 9px;border-radius:999px;font-size:12px;font-weight:750}.standard-card{min-height:150px;display:flex;flex-direction:column;justify-content:space-between}.subject-list{display:flex;flex-wrap:wrap;gap:8px}.subject{border:1px solid var(--line);background:#fff;padding:8px 10px;border-radius:10px;font-size:13px}.filters{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}.filters select,.filters input,.field{padding:11px;border:1px solid var(--line);border-radius:11px;background:#fff}.material{display:flex;gap:14px}.material-icon{width:48px;height:48px;border-radius:14px;background:#e9f7f2;display:grid;place-items:center;font-size:22px}.empty{padding:35px;text-align:center;color:var(--muted);background:#fff;border:1px dashed var(--line);border-radius:16px}.note-editor{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}.toolbar{display:flex;gap:5px;flex-wrap:wrap;padding:9px;border-bottom:1px solid var(--line);background:#f8fbfa}.toolbar button,.toolbar select{border:1px solid var(--line);background:#fff;border-radius:7px;padding:6px 9px}.editor{min-height:260px;padding:18px;outline:none}.auth{max-width:520px;margin:20px auto}.auth-tabs{display:flex;gap:6px;margin-bottom:15px}.auth-tabs button{flex:1}.auth-form{display:grid;gap:12px}.label{font-size:13px;font-weight:750}.pass-wrap{position:relative}.pass-wrap input{width:100%;padding-right:70px}.showpass{position:absolute;right:8px;top:7px;border:0;background:#eef5f2;padding:6px;border-radius:8px;font-size:12px}.modal{position:fixed;inset:0;background:#071b15a6;display:grid;place-items:center;z-index:30;padding:20px}.modal.hidden{display:none}.modal-card{width:min(720px,100%);max-height:90vh;overflow:auto;background:#fff;border-radius:20px;padding:24px;position:relative}.modal-x{position:absolute;right:15px;top:10px;border:0;background:transparent;font-size:28px}.toast{position:fixed;right:18px;bottom:18px;background:#163c33;color:#fff;padding:12px 16px;border-radius:12px;z-index:50;display:none;box-shadow:var(--shadow)}.toast.show{display:block}.stat{font-size:30px;font-weight:900}.video-card{display:flex;flex-direction:column;gap:8px}.link{color:var(--green);font-weight:750}.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:10px;border-bottom:1px solid var(--line);text-align:left}.qr{display:grid;place-items:center;padding:18px}.notice{padding:12px 14px;background:#fff8dd;border:1px solid #f4e3a5;border-radius:12px;color:#67521a}.upload{border:2px dashed #b8d9cd;padding:30px;text-align:center;border-radius:16px;background:#fbfffd}.job a,.ai a{display:block;padding:12px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--ink);margin:8px 0;background:#fff}.job a:hover,.ai a:hover{border-color:var(--green2)}@media(max-width:900px){.sidebar{position:fixed;left:-270px;top:70px;bottom:0;z-index:20;transition:.2s;box-shadow:var(--shadow)}.sidebar.open{left:0}.main{padding:18px}.hero{flex-direction:column}.top-search{max-width:none}.profile-chip span{display:none}}@media(max-width:650px){.topbar{padding:0 10px}.brand span{display:none}.top-search{margin:0}.two{grid-template-columns:1fr}.hero h1{font-size:28px}.main{padding:12px}.grid{grid-template-columns:1fr 1fr}.card{padding:14px}.nav{padding:12px}}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.hero-pill{background:#ffffff24;color:#fff}.research-box{display:flex;gap:10px;margin:18px 0;align-items:center}.research-input{flex:1;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:#fff;outline:none}.research-input:focus{border-color:var(--green2);box-shadow:0 0 0 3px #19a77f18}.research-results .card{min-height:190px}code{background:#eef5f2;padding:2px 5px;border-radius:5px}@media(max-width:650px){.research-box{flex-wrap:wrap}.research-input{flex-basis:100%}}

/* v3 visual refresh */
.back-btn{display:none}.topbar{box-shadow:0 2px 16px #0b6b5708}.hero{background:linear-gradient(135deg,#075c4c 0%,#0b6b57 55%,#28b889 100%);min-height:250px}.hero h1{letter-spacing:-.8px}.main{padding-top:24px}.section{margin:24px 0}.card{transition:transform .16s ease,box-shadow .16s ease}.card:hover{transform:translateY(-2px);box-shadow:0 12px 28px #0b6b5712}.dashboard-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.class-card{min-height:190px}.stage-label{font-size:12px;color:var(--muted);font-weight:800;text-transform:uppercase;letter-spacing:.08em}.catalogue-note{font-size:13px;color:var(--muted)}.admin-tools{display:flex;gap:10px;flex-wrap:wrap}.compact-list{display:flex;flex-wrap:wrap;gap:6px}.compact-list span{font-size:12px;padding:5px 8px;border-radius:8px;background:#f2f8f5;border:1px solid var(--line)}.table-scroll{overflow:auto}@media(min-width:901px){.back-btn{display:inline-block}}@media(max-width:900px){.back-btn{display:inline-block}.dashboard-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:650px){.dashboard-grid{grid-template-columns:1fr 1fr}.hero{padding:22px}.topbar{gap:7px}.back-btn{font-size:22px}}
.scanner-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);gap:18px}.scanner-camera video{width:100%;min-height:280px;background:#071b2d;border-radius:18px;object-fit:cover}.scanner-preview{margin-top:12px;min-height:90px;border:1px dashed #b7c7d5;border-radius:16px;padding:8px;display:flex;align-items:center;justify-content:center}.scanner-preview.empty{color:#718096}.scanner-preview img{max-width:100%;max-height:300px;border-radius:12px}.scanner-tabs,.scanner-actions{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}.scan-badge{display:inline-block;padding:6px 10px;border-radius:999px;background:#e8f4ff;margin-bottom:8px;font-size:.8rem}.scan-text{padding:12px;border-radius:12px;background:#f4f7fa;margin:12px 0;white-space:pre-wrap}.scanner-answer{margin-top:12px}.hidden{display:none!important}@media(max-width:900px){.scanner-grid{grid-template-columns:1fr}}

/* v5 Figma-inspired learning dashboard: spacious cards, cool analytics palette, clear hierarchy */
:root{--green:#1769d2;--green2:#4a8df0;--ink:#17233b;--muted:#66738a;--line:#e5eaf2;--bg:#f5f7fb;--danger:#c9364b;--shadow:0 12px 34px rgba(35,54,91,.08)}
body{background:#f5f7fb;color:var(--ink)}.topbar{height:72px;background:#fff;border-bottom:1px solid #e7ebf2}.brand span{color:#1769d2}.sidebar{background:#fff;border-right:1px solid #e5eaf2}.nav{color:#637089}.nav:hover,.nav.active{background:#edf4ff;color:#1769d2}.offline{background:#f4f7fc}.main{max-width:1500px}.dash-welcome{background:linear-gradient(135deg,#102b63 0%,#1769d2 58%,#5c8ee8 100%);color:#fff;border-radius:24px;padding:30px 34px;display:flex;justify-content:space-between;gap:24px;box-shadow:var(--shadow);min-height:230px}.dash-welcome h1{font-size:36px;letter-spacing:-1px;margin:10px 0 8px}.dash-welcome p{max-width:720px;color:#e7efff;line-height:1.6}.welcome-art{min-width:190px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#dfeaff}.mini-ring{width:130px;height:130px;border-radius:50%;border:12px solid rgba(255,255,255,.28);border-top-color:#fff;display:grid;place-items:center;font-size:30px;font-weight:900}.metric-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:6px}.metric-card b{font-size:30px}.metric-card small{color:var(--muted)}.quick-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.quick-card{border:1px solid var(--line);background:#fff;border-radius:18px;padding:18px;text-align:left;display:flex;flex-direction:column;gap:8px;box-shadow:var(--shadow);cursor:pointer;color:var(--ink);transition:.16s}.quick-card:hover{transform:translateY(-2px);border-color:#bdd3f8}.quick-card span{font-size:25px}.quick-card small{color:var(--muted)}.stage-grid{grid-template-columns:repeat(3,1fr)}.stage-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;box-shadow:var(--shadow)}.stage-icon{width:48px;height:48px;border-radius:14px;background:#edf4ff;display:grid;place-items:center;font-size:24px}.feature-icon{width:50px;height:50px;border-radius:15px;background:#edf4ff;display:grid;place-items:center;font-size:24px}.quiz-launch-grid{grid-template-columns:repeat(3,1fr)}.quiz-launch{min-height:220px}.quiz-q-head{display:flex;justify-content:space-between;gap:12px}.options{display:grid;gap:10px;margin-top:14px}.option{display:flex;gap:10px;align-items:center;padding:13px;border:1px solid var(--line);border-radius:12px;cursor:pointer;background:#fff}.option.selected{border-color:#1769d2;background:#edf4ff}.option input{accent-color:#1769d2}.quiz-submit-bar{position:sticky;bottom:0;background:#fff;border:1px solid var(--line);padding:14px;border-radius:16px;display:flex;gap:10px;justify-content:flex-end;box-shadow:0 -8px 30px rgba(20,40,70,.08)}.quiz-timer{background:#101d36;color:#fff;padding:12px 16px;border-radius:14px;font-weight:900;min-width:100px;text-align:center}.quiz-progress{height:7px;background:#e9edf5;border-radius:99px;overflow:hidden;margin:12px 0 18px}.quiz-progress div{height:100%;background:#1769d2}.result-hero{background:linear-gradient(135deg,#102b63,#1769d2);color:#fff;border-radius:24px;padding:32px}.result-hero h1{font-size:64px;margin:8px 0}.result-hero p{color:#e8f0ff}.result-actions{display:flex;gap:10px}.review-row{padding:14px;border-bottom:1px solid var(--line);border-left:4px solid #bbb;margin-bottom:8px}.review-row.correct{border-left-color:#1ca36d;background:#f1fbf6}.review-row.wrong{border-left-color:#c9364b;background:#fff3f5}.calendar-grid{grid-template-columns:.8fr 1.2fr}.event-row,.teacher-row,.activity-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 0;border-bottom:1px solid var(--line)}.event-row small,.teacher-row small,.activity-row small{display:block;color:var(--muted);margin-top:3px}.resource-card{min-height:190px}.bar-row{display:grid;grid-template-columns:1fr auto;gap:6px;margin:13px 0}.bar{grid-column:1/-1;height:7px;background:#edf0f6;border-radius:99px;overflow:hidden}.bar i{display:block;height:100%;background:#1769d2}.admin-stats{grid-template-columns:repeat(4,1fr)}
@media(max-width:1000px){.quick-grid,.quiz-launch-grid,.stage-grid{grid-template-columns:1fr 1fr}.calendar-grid{grid-template-columns:1fr}.admin-stats{grid-template-columns:1fr 1fr}.dash-welcome{flex-direction:column}.welcome-art{align-items:flex-start}}
@media(max-width:650px){.quick-grid,.quiz-launch-grid,.stage-grid,.admin-stats{grid-template-columns:1fr}.dash-welcome{padding:22px}.dash-welcome h1{font-size:28px}.stage-card{grid-template-columns:auto 1fr}.stage-card .btn{grid-column:1/-1}.quiz-submit-bar{flex-direction:column}.result-hero h1{font-size:48px}}

.creator-credit{margin:28px 0;text-align:center;color:#64748b;font-size:.9rem}.creator-credit b{color:#0b6b57}.terms-check{display:flex;gap:9px;align-items:flex-start;margin:14px 0;color:#475569;font-size:.9rem;line-height:1.45}.terms-check input{margin-top:4px}.link-btn{border:0;background:none;color:#0b6b57;text-decoration:underline;padding:0;cursor:pointer;font:inherit}.terms-modal{max-height:70vh;overflow:auto}.terms-modal h2{margin-top:8px}.terms-modal h3{margin:18px 0 6px}.terms-modal p{color:#475569;line-height:1.6}.topbar .brand img{width:38px;height:38px}.side-foot{line-height:1.45}

.auth-gate{min-height:calc(100vh - 92px);display:grid;place-items:center;padding:32px}.auth-gate-card{width:min(560px,100%);background:var(--card,#fff);border:1px solid rgba(0,0,0,.08);border-radius:28px;padding:42px;box-shadow:0 24px 70px rgba(0,0,0,.12);text-align:center}.auth-gate-logo img{width:82px;height:82px;margin-bottom:16px}.auth-gate-card h1{margin:12px 0 10px}.auth-gate-card p{line-height:1.7;color:var(--muted,#667085)}.auth-gate-actions{display:flex;flex-direction:column;gap:12px;margin:24px 0}.auth-gate-actions .btn{width:100%}.auth-gate-card .notice{text-align:left;margin:18px 0}.auth-gate-card .link-btn{background:none;border:0;cursor:pointer}


/* Authentication hard gate: protects the app even if an old cached JS bundle is served. */
.hard-auth-gate{display:none;position:fixed;inset:0;z-index:99999;background:rgba(245,247,251,.98);align-items:center;justify-content:center;padding:24px;overflow:auto}.hard-auth-gate.show{display:flex}.hard-auth-card{width:min(560px,100%);background:#fff;border:1px solid var(--line,#e5eaf2);border-radius:28px;padding:42px;box-shadow:0 24px 70px rgba(20,40,70,.16);text-align:center}.hard-auth-logo{width:84px;height:84px;margin:0 auto 14px}.hard-auth-card h1{margin:14px 0 8px}.hard-auth-card p{color:var(--muted,#66738a);line-height:1.65}.hard-auth-actions{display:flex;flex-direction:column;gap:12px;margin:24px 0}.hard-auth-actions .btn{width:100%}.hard-auth-note{font-size:13px}
.read-aloud-bar{margin:0 0 18px;padding:16px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);position:relative;z-index:2}.read-aloud-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.read-aloud-head b{display:block;font-size:16px}.read-aloud-head span{display:block;color:var(--muted);font-size:13px;margin-top:3px}.read-aloud-head label{font-size:13px;color:var(--muted)}.read-aloud-head select{margin-left:6px;padding:8px 10px;border:1px solid var(--line);border-radius:10px;background:#fff}.read-aloud-controls{display:grid;grid-template-columns:auto auto auto auto minmax(120px,1fr) auto;gap:8px;align-items:center;margin-top:12px}.read-aloud-controls input[type=range]{width:100%;accent-color:#1769d2}.read-aloud-controls .btn{min-height:40px;padding:8px 12px}@media(max-width:700px){.read-aloud-controls{grid-template-columns:1fr 1fr 1fr}.read-aloud-controls input[type=range]{grid-column:1/-1;grid-row:2}.read-aloud-controls #readBack{grid-column:1}.read-aloud-controls #readForward{grid-column:3}.hard-auth-card{padding:28px 20px}}