:root{--navy:#0b1f3a;--navy2:#07172b;--blue:#2457d6;--blue2:#1e49b8;--ink:#132238;--muted:#67768c;--line:#dde4ee;--soft:#f4f7fb;--card:#fff;--warn:#b42318;--success:#087a55;--radius:14px;--shadow:0 18px 50px rgba(16,34,62,.10)}
*{box-sizing:border-box}html{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#f7f9fc}body{margin:0;min-height:100vh}button,input{font:inherit}button{cursor:pointer}.hidden{display:none!important}.app-bg{background:radial-gradient(circle at 15% 15%,#edf3ff 0,transparent 35%),linear-gradient(135deg,#f8fafc,#eef3f9)}
.entry-shell{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(380px,.9fr);max-width:1180px;margin:auto;align-items:center;gap:64px;padding:48px}.brand-panel{padding:24px 8px}.brand-mark{width:62px;height:62px;border-radius:16px;display:grid;place-items:center;background:var(--navy);color:#fff;font-weight:800;letter-spacing:.03em;font-size:21px;box-shadow:0 10px 30px rgba(11,31,58,.18)}.brand-mark-sm{width:42px;height:42px;border-radius:11px;font-size:14px;box-shadow:none}.eyebrow{margin:20px 0 8px;text-transform:uppercase;letter-spacing:.14em;font-size:12px;font-weight:800;color:var(--blue)}.brand-panel h1,.entry-card h1,.entry-card h2,.exam-card h1,.dashboard-header h1{font-size:clamp(30px,4vw,52px);line-height:1.08;letter-spacing:-.035em;margin:0}.entry-card h2{font-size:32px}.lead{font-size:18px;line-height:1.65;color:var(--muted);max-width:650px}.feature-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.feature-row span,.status-pill{border:1px solid #cfd9e7;background:rgba(255,255,255,.72);border-radius:999px;padding:8px 12px;font-size:12px;font-weight:700;color:#41536d}.entry-card,.exam-card{background:rgba(255,255,255,.96);border:1px solid rgba(210,220,232,.9);border-radius:20px;padding:38px;box-shadow:var(--shadow)}.entry-card__head p:last-child{color:var(--muted);margin-top:8px}.form-stack{display:grid;gap:17px;margin-top:26px}.form-stack label,.create-grid label{display:grid;gap:8px;font-size:13px;font-weight:700;color:#34445c}.form-stack input,.create-grid input{width:100%;border:1px solid #cfd8e5;background:#fff;border-radius:10px;padding:13px 14px;outline:none;color:var(--ink);transition:border .15s,box-shadow .15s}.form-stack input:focus,.create-grid input:focus{border-color:#6e91ec;box-shadow:0 0 0 4px rgba(36,87,214,.10)}.btn{border:0;border-radius:10px;padding:11px 16px;font-weight:800;transition:transform .12s,background .12s,box-shadow .12s}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 22px rgba(36,87,214,.18)}.btn-primary:hover{background:var(--blue2)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}.btn-secondary{background:#fff;color:var(--ink);border:1px solid #cfd8e5}.btn-lg{padding:14px 18px}.full-width{width:100%;margin-top:20px}.form-message{min-height:19px;margin:0;font-size:13px;color:var(--warn)}.text-link{display:inline-block;margin-top:20px;color:var(--blue);font-size:13px;font-weight:700;text-decoration:none}.brand-inline{display:flex;align-items:center;gap:12px}.center-shell{min-height:100vh;display:grid;place-items:center;padding:28px}.prequiz-card{width:min(760px,100%)}.prequiz-card h1{font-size:38px;margin:6px 0 22px}.summary-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.summary-grid>div{border:1px solid var(--line);border-radius:12px;padding:14px;background:var(--soft)}.summary-grid span,.summary-grid strong{display:block}.summary-grid span{font-size:12px;color:var(--muted);margin-bottom:5px}.notice-box{margin:24px 0;border:1px solid var(--line);border-radius:12px;padding:18px 20px}.notice-box h2{font-size:16px;margin:0 0 10px}.notice-box ul{margin:0;padding-left:20px;color:#42516a;line-height:1.65}.check-row{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:#3e4e64;margin-bottom:18px}.check-row input{margin-top:3px}
.quiz-body{background:#f0f4f8;overflow:hidden;user-select:none;-webkit-user-select:none}.quiz-header{height:88px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:14px 30px;position:relative;z-index:5}.quiz-brand{display:flex;align-items:center;gap:12px}.quiz-brand div:last-child{display:grid}.quiz-brand span{font-size:12px;color:var(--muted);margin-top:3px}.quiz-status{display:flex;align-items:center;gap:28px}.progress-copy{min-width:260px;font-size:12px;color:#52627a;font-weight:700}.progress-track{height:6px;background:#e9eef5;border-radius:999px;margin-top:8px;overflow:hidden}.progress-track>div{height:100%;width:0;background:var(--blue);transition:width .2s}.timer{border-left:1px solid var(--line);padding-left:24px;display:grid;text-align:right}.timer span{font-size:11px;color:var(--muted)}.timer strong{font-size:24px;letter-spacing:.02em}.quiz-shell{height:calc(100vh - 88px);overflow:auto;display:grid;place-items:center;padding:34px}.question-card{width:min(900px,100%);background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 14px 38px rgba(21,43,74,.08);padding:32px;position:relative;z-index:2}.question-meta{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.08em}.question-text{font-size:21px;line-height:1.55;font-weight:650;margin:24px 0 26px;white-space:pre-wrap}.options{display:grid;gap:12px}.option-card{display:grid;grid-template-columns:42px 1fr;align-items:center;gap:12px;border:1px solid #cfd9e7;border-radius:12px;padding:13px 15px;background:#fff;cursor:pointer;transition:border .14s,background .14s,box-shadow .14s}.option-card:hover{border-color:#97afea;background:#fbfcff}.option-card.selected{border-color:var(--blue);background:#f3f7ff;box-shadow:0 0 0 3px rgba(36,87,214,.08)}.option-letter{width:34px;height:34px;border-radius:9px;background:#eef2f7;display:grid;place-items:center;font-weight:800;color:#384960}.selected .option-letter{background:var(--blue);color:#fff}.option-copy{font-size:16px;line-height:1.45;white-space:pre-wrap}.question-actions{display:flex;align-items:center;justify-content:space-between;margin-top:28px;padding-top:22px;border-top:1px solid #edf1f5}.save-state{font-size:12px;color:var(--muted)}.watermark-layer{position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.055;overflow:hidden;display:grid;grid-template-columns:repeat(4,1fr);transform:rotate(-16deg) scale(1.3);gap:60px}.watermark-layer span{font-size:14px;font-weight:800;color:#162c4a;white-space:nowrap}.modal-backdrop{position:fixed;inset:0;background:rgba(5,17,31,.67);display:grid;place-items:center;z-index:20;padding:20px}.modal-card{width:min(440px,100%);background:#fff;border-radius:18px;padding:28px;text-align:center;box-shadow:var(--shadow)}.warning-icon{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;margin:auto;background:#fff0ee;color:var(--warn);font-size:28px;font-weight:900}.modal-card h2{margin:16px 0 8px}.modal-card p{color:var(--muted);line-height:1.55}.result-card{text-align:center;width:min(520px,100%)}.success-icon{width:62px;height:62px;border-radius:50%;display:grid;place-items:center;margin:auto;background:#e8f7f1;color:var(--success);font-size:30px;font-weight:900}.result-card h1{font-size:38px}.result-card p{color:var(--muted)}.score-panel{margin:22px auto;max-width:280px;border:1px solid var(--line);border-radius:14px;padding:18px}.score-panel span,.score-panel strong{display:block}.score-panel strong{font-size:28px;margin-top:5px}
.dashboard-bg{background:#f4f7fb}.dashboard{min-height:100vh;display:grid;grid-template-columns:245px 1fr}.sidebar{background:var(--navy2);color:#fff;padding:22px 16px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.sidebar-brand{padding:4px 8px 22px}.sidebar-brand strong,.sidebar-brand span{display:block}.sidebar-brand span{font-size:11px;color:#93a5bd;margin-top:3px}.nav-stack{display:grid;gap:6px}.nav-item{border:0;background:transparent;color:#b9c5d4;text-align:left;border-radius:9px;padding:11px 12px;font-weight:700}.nav-item:hover,.nav-item.active{background:rgba(255,255,255,.09);color:#fff}.nav-logout{margin-top:auto}.dashboard-main{padding:30px 36px}.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.dashboard-header .eyebrow{margin:0 0 5px}.dashboard-header h1{font-size:34px}.user-chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 12px;font-size:12px;color:#52627a}.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.metric-card,.panel{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 8px 24px rgba(20,45,76,.04)}.metric-card{padding:20px}.metric-card span,.metric-card small{display:block;color:var(--muted);font-size:12px}.metric-card strong{display:block;font-size:30px;margin:7px 0 3px}.panel{margin-top:20px;padding:22px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:18px}.panel-head .eyebrow{margin:0 0 5px}.panel-head h2{margin:0;font-size:21px}.table-wrap{overflow:auto}.data-table{width:100%;border-collapse:collapse;font-size:13px}.data-table th{text-align:left;color:#68788d;font-size:11px;text-transform:uppercase;letter-spacing:.07em;padding:10px;border-bottom:1px solid var(--line)}.data-table td{padding:12px 10px;border-bottom:1px solid #edf1f5;vertical-align:middle}.data-table tr:last-child td{border-bottom:0}.code-pill{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#eef3fb;border-radius:7px;padding:5px 8px;font-weight:800;color:#244c9f}.action-row{display:flex;gap:7px;flex-wrap:wrap}.mini-btn{border:1px solid #cfd8e5;background:#fff;border-radius:8px;padding:7px 9px;font-size:11px;font-weight:800;color:#34445c}.create-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(360px,1.1fr);gap:34px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:12px}.toggle-card{display:flex;align-items:center;justify-content:space-between;gap:15px;border:1px solid var(--line);border-radius:11px;padding:13px}.toggle-card strong,.toggle-card span{display:block}.toggle-card strong{font-size:13px}.toggle-card span{font-size:11px;color:var(--muted);margin-top:3px}.switch input{display:none}.switch span{display:block;width:42px;height:24px;background:#c7d1de;border-radius:999px;position:relative}.switch span:after{content:"";position:absolute;width:18px;height:18px;background:#fff;border-radius:50%;top:3px;left:3px;transition:left .15s}.switch input:checked+span{background:var(--blue)}.switch input:checked+span:after{left:21px}.topic-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:10px}.topic-head strong,.topic-head span{display:block}.topic-head span{font-size:12px;color:var(--muted);margin-top:4px}.text-button{border:0;background:none;color:var(--blue);font-size:12px;font-weight:800}.topic-list{border:1px solid var(--line);border-radius:12px;max-height:390px;overflow:auto}.topic-row{display:grid;grid-template-columns:24px 1fr auto;align-items:center;gap:8px;padding:11px 12px;border-bottom:1px solid #edf1f5}.topic-row:last-child{border-bottom:0}.topic-row strong{font-size:13px}.topic-row span{font-size:11px;color:var(--muted)}.topic-count{font-size:11px;font-weight:800;color:#50617a;background:#f1f4f8;border-radius:999px;padding:5px 8px}.instructor-login{width:min(440px,100%)}
@media(max-width:850px){.entry-shell{grid-template-columns:1fr;gap:24px;padding:28px}.brand-panel{padding:0}.feature-row{display:none}.summary-grid{grid-template-columns:1fr 1fr}.dashboard{grid-template-columns:1fr}.sidebar{height:auto;position:static;flex-direction:row;align-items:center;overflow:auto}.nav-stack{display:flex}.nav-logout{margin:0 0 0 auto}.sidebar-brand{display:none}.dashboard-main{padding:22px}.create-grid{grid-template-columns:1fr}.metric-grid{grid-template-columns:1fr}.quiz-header{height:auto;gap:14px;padding:12px 16px}.quiz-status{gap:12px}.progress-copy{min-width:160px}.quiz-shell{height:calc(100vh - 82px);padding:16px}.question-card{padding:20px}.question-text{font-size:18px}.timer{padding-left:12px}.timer strong{font-size:20px}}@media(max-width:560px){.entry-card,.exam-card{padding:24px}.summary-grid{grid-template-columns:1fr 1fr}.quiz-brand div:last-child{display:none}.progress-copy{min-width:120px}.question-actions{gap:10px}.dashboard-header{align-items:flex-start}.user-chip{display:none}.two-col{grid-template-columns:1fr}.sidebar{padding:10px;gap:6px}.nav-item{white-space:nowrap;padding:9px}.dashboard-main{padding:16px}.panel{padding:15px}}
@media print{body{display:none!important}}