:root{--bg-1: #f3f5fd;--bg-2: #eaecfb;--card: #ffffff;--card-2: #fbfbff;--primary: #6366f1;--primary-2: #8b5cf6;--primary-ink: #4338ca;--grad-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);--grad-success: linear-gradient(135deg, #10b981 0%, #059669 100%);--grad-danger: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%);--success: #10b981;--danger: #ef4444;--warning: #f59e0b;--accent: #06b6d4;--text: #0f172a;--muted: #64748b;--border: #e7e9f5;--ring: rgba(99, 102, 241, .18);--radius-lg: 22px;--radius: 16px;--radius-sm: 12px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .04), 0 2px 8px rgba(15, 23, 42, .04);--shadow: 0 6px 18px rgba(31, 38, 90, .07), 0 22px 48px rgba(31, 38, 90, .08);--shadow-primary: 0 10px 24px rgba(99, 102, 241, .28)}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{font-family:Inter,Segoe UI,system-ui,-apple-system,sans-serif;color:var(--text);font-size:18px;line-height:1.5;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;background:radial-gradient(1200px 600px at 12% -8%,#e7e9ff 0%,transparent 55%),radial-gradient(1000px 600px at 100% 0%,#f0e9ff 0%,transparent 50%),linear-gradient(180deg,var(--bg-1) 0%,var(--bg-2) 100%);background-attachment:fixed}.app-root{min-height:100%;display:flex;flex-direction:column}.screen{flex:1;display:flex;flex-direction:column;padding:28px 24px 48px}.screen--center{align-items:center;justify-content:center;min-height:100vh}.container{width:100%;max-width:1040px;margin:0 auto}.container--narrow{max-width:480px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;background:#ffffffb8;backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border:1px solid rgba(255,255,255,.6);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:14px 22px;margin-bottom:22px}.topbar .op{font-weight:700;display:flex;flex-direction:column}.topbar .op:before{content:"";width:0}.topbar .op small{color:var(--muted);font-weight:500;font-size:13px;display:inline-flex;align-items:center;gap:6px}.topbar .op small:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 0 4px #10b98129;display:inline-block}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:34px;animation:rise .4s cubic-bezier(.2,.7,.2,1) both}.card h1{font-size:30px;font-weight:800;letter-spacing:-.02em;margin:0 0 8px}.card .sub{color:var(--muted);margin:0 0 26px;font-size:17px}.brand{width:84px;height:84px;margin:0 auto 20px;border-radius:24px;display:grid;place-items:center;font-size:40px;background:var(--grad-primary);color:#fff;box-shadow:var(--shadow-primary)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:var(--radius-sm);padding:15px 24px;font-size:17px;font-weight:700;font-family:inherit;cursor:pointer;color:var(--text);background:#eef0f8;transition:transform .12s ease,box-shadow .2s ease,background .2s ease,opacity .2s}.btn:hover:not(:disabled){transform:translateY(-2px)}.btn:active:not(:disabled){transform:translateY(0) scale(.99)}.btn:focus-visible{outline:none;box-shadow:0 0 0 4px var(--ring)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--primary{background:var(--grad-primary);color:#fff;box-shadow:var(--shadow-primary)}.btn--primary:hover:not(:disabled){box-shadow:0 14px 30px #6366f161}.btn--success{background:var(--grad-success);color:#fff;box-shadow:0 10px 24px #10b98142}.btn--danger{background:var(--grad-danger);color:#fff;box-shadow:0 10px 24px #f43f5e42}.btn--ghost{background:transparent;color:var(--muted);border-color:var(--border)}.btn--ghost:hover:not(:disabled){background:#fff;color:var(--text)}.btn--lg{padding:18px 30px;font-size:20px;width:100%;border-radius:14px}.btn--block{width:100%}.field{margin-bottom:18px}.field label{display:block;font-weight:600;margin-bottom:9px;font-size:15px;color:#334155}.input{width:100%;padding:16px 18px;font-size:20px;font-family:inherit;border:1.5px solid var(--border);border-radius:14px;outline:none;background:#fff;color:var(--text);transition:border-color .15s,box-shadow .15s}.input::placeholder{color:#aab2c5}.input:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--ring)}.input--big{font-size:30px;text-align:center;letter-spacing:6px;font-weight:700}.code-screen{padding:20px}.code-card{width:100%;max-width:380px;background:var(--card);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow);padding:30px 28px 22px;text-align:center;animation:rise .4s cubic-bezier(.2,.7,.2,1) both}.brand--sm{width:60px;height:60px;border-radius:18px;font-size:28px;margin-bottom:14px}.code-title{font-size:22px;font-weight:800;letter-spacing:-.02em;margin:0 0 4px}.code-sub{color:var(--muted);font-size:14px;margin:0 0 20px}.code-screen .code-boxes{gap:8px}.code-screen .code-boxes input{width:44px;height:56px;font-size:24px;border-radius:13px}.code-btn{width:100%;margin-top:18px;padding:13px 20px;font-size:17px;border-radius:13px}.code-error{font-size:14px;margin-top:10px}.code-foot{margin-top:18px;color:#aab2c5;font-size:12px;letter-spacing:.3px}.code-boxes{display:flex;gap:12px;justify-content:center}.code-boxes input{width:60px;height:76px;font-size:36px;font-weight:800;text-align:center;border:1.5px solid var(--border);border-radius:16px;outline:none;background:#fff;color:var(--text);transition:border-color .15s,box-shadow .15s,transform .1s}.code-boxes input:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--ring);transform:translateY(-2px)}.error{color:var(--danger);margin-top:14px;font-weight:600}.muted{color:var(--muted)}.center{text-align:center}.row{display:flex;gap:12px;flex-wrap:wrap}.spacer{flex:1}.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;font-size:13px;font-weight:700;background:#eef0ff;color:var(--primary-ink)}.badge--gray{background:#eef1f6;color:var(--muted)}.badge--green{background:#dcfce7;color:#047857}.badge--red{background:#ffe4e6;color:#be123c}.exam-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}.exam-card{position:relative;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:24px;display:flex;flex-direction:column;overflow:hidden;transition:transform .18s ease,box-shadow .18s ease}.exam-card:before{content:"";position:absolute;inset:0 0 auto 0;height:5px;background:var(--grad-primary)}.exam-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.exam-card h3{margin:8px 0 12px;font-size:20px;font-weight:700;letter-spacing:-.01em}.exam-card .meta{color:var(--muted);font-size:15px;margin-bottom:18px}.exam-card .meta div{margin-bottom:6px}.exam-card .meta b{color:var(--text)}.exam-header{position:sticky;top:14px;z-index:5;background:#ffffffc7;backdrop-filter:saturate(180%) blur(16px);-webkit-backdrop-filter:saturate(180%) blur(16px);border:1px solid rgba(255,255,255,.6);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 22px;display:flex;align-items:center;gap:16px;margin-bottom:18px}.countdown{font-size:22px;font-weight:800;font-variant-numeric:tabular-nums;background:#eef0ff;color:var(--primary-ink);padding:8px 16px;border-radius:999px}.countdown--warn{background:#ffe4e6;color:#be123c;animation:pulse 1s ease-in-out infinite}.progress-track{height:8px;border-radius:999px;background:#eef1f8;overflow:hidden;margin-bottom:18px;box-shadow:var(--shadow-sm)}.progress-fill{height:100%;background:var(--grad-primary);border-radius:999px;transition:width .35s ease}.question{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:26px;margin-bottom:16px;transition:box-shadow .2s,border-color .2s}.question:hover{box-shadow:var(--shadow)}.question .q-text{font-size:20px;font-weight:700;margin-bottom:18px;letter-spacing:-.01em}.choice{display:flex;align-items:center;gap:14px;padding:15px 18px;border:1.5px solid var(--border);border-radius:14px;margin-bottom:11px;cursor:pointer;font-size:18px;transition:border-color .15s,background .15s,transform .08s}.choice:hover{border-color:#c7cbf3;background:#fafbff}.choice:active{transform:scale(.995)}.choice.selected{border-color:var(--primary);background:linear-gradient(135deg,#6366f114,#8b5cf614);box-shadow:0 0 0 3px var(--ring) inset}.choice input{width:22px;height:22px;accent-color:var(--primary)}.subject-title{font-size:13px;color:var(--primary-ink);text-transform:uppercase;letter-spacing:1.4px;font-weight:800;margin:28px 0 12px;display:flex;align-items:center;gap:10px}.subject-title:before{content:"";width:22px;height:3px;border-radius:2px;background:var(--grad-primary)}.qnav{display:flex;flex-wrap:wrap;gap:8px}.qnav button{width:44px;height:44px;border-radius:12px;border:1.5px solid var(--border);background:#fff;font-weight:700;cursor:pointer;color:var(--muted);transition:all .15s}.qnav button:hover{border-color:var(--primary);color:var(--primary)}.qnav button.answered{background:var(--grad-primary);color:#fff;border-color:transparent;box-shadow:var(--shadow-primary)}.exam-layout{display:grid;grid-template-columns:248px minmax(0,1fr);gap:20px;align-items:start}.exam-nav-side{position:sticky;top:100px;align-self:start}.exam-nav-card{padding:18px 18px 20px}.exam-main{min-width:0}.nav-title{font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:1.2px;color:var(--muted);margin-bottom:12px}.exam-main .subject-title:first-child{margin-top:0}@media (max-width: 860px){.exam-layout{grid-template-columns:1fr}.exam-nav-side{position:static;top:auto}}.result-score{font-size:76px;font-weight:900;line-height:1;letter-spacing:-.03em;margin:8px 0;background:var(--grad-primary);-webkit-background-clip:text;background-clip:text;color:transparent}.result--pass{background:var(--grad-success);-webkit-background-clip:text;background-clip:text;color:transparent}.result--fail{background:var(--grad-danger);-webkit-background-clip:text;background-clip:text;color:transparent}.subj-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin-bottom:22px}.subj{padding:18px;border:1.5px solid var(--border);border-radius:14px;cursor:pointer;font-size:18px;font-weight:600;display:flex;align-items:center;gap:12px;background:#fff;transition:all .15s}.subj:hover{border-color:#c7cbf3}.subj.selected{border-color:var(--primary);background:linear-gradient(135deg,#6366f114,#8b5cf614);box-shadow:0 0 0 3px var(--ring) inset}.subj.disabled{opacity:.45;pointer-events:none}.subj input{accent-color:var(--primary);width:20px;height:20px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a6b;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:50;padding:20px;animation:fadein .18s ease both}.modal{background:#fff;border-radius:var(--radius-lg);padding:30px;max-width:460px;width:100%;box-shadow:var(--shadow);animation:pop .22s cubic-bezier(.2,.8,.2,1) both}.modal h3{margin:0 0 12px;font-size:22px;font-weight:800}.offline-banner{background:var(--grad-danger);color:#fff;text-align:center;padding:9px;font-weight:700;font-size:15px}.toast-wrap{position:fixed;bottom:26px;left:50%;transform:translate(-50%);display:flex;flex-direction:column;gap:10px;z-index:100}.toast{padding:14px 22px;border-radius:14px;color:#fff;box-shadow:var(--shadow);cursor:pointer;font-weight:600;display:flex;align-items:center;gap:10px;animation:slideup .25s ease both}.toast:before{content:"";width:9px;height:9px;border-radius:50%;background:#ffffffe6}.toast--info{background:#1e293b}.toast--error{background:var(--grad-danger)}.toast--success{background:var(--grad-success)}.toast--warning{background:linear-gradient(135deg,#f59e0b,#d97706)}@keyframes rise{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes pop{0%{opacity:0;transform:scale(.94)}to{opacity:1;transform:scale(1)}}@keyframes fadein{0%{opacity:0}to{opacity:1}}@keyframes slideup{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.fade-enter-active,.fade-leave-active{transition:opacity .2s ease,transform .2s ease}.fade-enter-from{opacity:0;transform:translateY(8px)}.fade-leave-to{opacity:0;transform:translateY(-8px)}.exam-mode{-webkit-user-select:none;user-select:none}@media (max-width: 560px){body{font-size:17px}.card{padding:24px}.code-boxes input{width:46px;height:62px;font-size:28px}.result-score{font-size:60px}}
