:root{color-scheme:dark light;--bg: #07111f;--bg-alt: #0f172a;--bg-grad-a: #020617;--bg-grad-b: #0f172a;--bg-grad-c: #111827;--panel: rgba(15, 23, 42, .78);--panel-strong: rgba(17, 24, 39, .94);--surface: rgba(2, 6, 23, .62);--surface-strong: rgba(15, 23, 42, .98);--surface-soft: rgba(148, 163, 184, .08);--surface-input: rgba(15, 23, 42, .9);--surface-chip: rgba(2, 6, 23, .72);--line: rgba(148, 163, 184, .16);--line-soft: rgba(148, 163, 184, .12);--text: #e2e8f0;--text-strong: #ffffff;--muted: #94a3b8;--accent: #22c55e;--accent-2: #38bdf8;--danger: #fb7185;--warning: #fbbf24;--shadow: 0 24px 70px rgba(2, 6, 23, .42);--button-primary-text: #04211a;--chip-text: #dbeafe;--input-text: #e2e8f0;--radius: 24px;--radius-sm: 16px;font-family:Trebuchet MS,Segoe UI,sans-serif;color:var(--text);background:radial-gradient(circle at top left,rgba(56,189,248,.18),transparent 30%),radial-gradient(circle at top right,rgba(34,197,94,.14),transparent 26%),linear-gradient(160deg,var(--bg-grad-a),var(--bg-grad-b) 42%,var(--bg-grad-c))}@media (prefers-color-scheme: light){:root:not([data-theme]){--bg: #f8fafc;--bg-alt: #eef2ff;--bg-grad-a: #f8fafc;--bg-grad-b: #eef2ff;--bg-grad-c: #e2e8f0;--panel: rgba(255, 255, 255, .76);--panel-strong: rgba(255, 255, 255, .95);--surface: rgba(255, 255, 255, .82);--surface-strong: rgba(255, 255, 255, .96);--surface-soft: rgba(15, 23, 42, .04);--surface-input: rgba(255, 255, 255, .96);--surface-chip: rgba(255, 255, 255, .9);--line: rgba(148, 163, 184, .26);--line-soft: rgba(148, 163, 184, .18);--text: #0f172a;--text-strong: #020617;--muted: #475569;--shadow: 0 24px 70px rgba(15, 23, 42, .12);--button-primary-text: #052e1f;--chip-text: #0f172a;--input-text: #0f172a}}[data-theme=light]{--bg: #f8fafc;--bg-alt: #eef2ff;--bg-grad-a: #f8fafc;--bg-grad-b: #eef2ff;--bg-grad-c: #e2e8f0;--panel: rgba(255, 255, 255, .76);--panel-strong: rgba(255, 255, 255, .95);--surface: rgba(255, 255, 255, .82);--surface-strong: rgba(255, 255, 255, .96);--surface-soft: rgba(15, 23, 42, .04);--surface-input: rgba(255, 255, 255, .96);--surface-chip: rgba(255, 255, 255, .9);--line: rgba(148, 163, 184, .26);--line-soft: rgba(148, 163, 184, .18);--text: #0f172a;--text-strong: #020617;--muted: #475569;--shadow: 0 24px 70px rgba(15, 23, 42, .12);--button-primary-text: #052e1f;--chip-text: #0f172a;--input-text: #0f172a}[data-theme=dark]{--bg: #07111f;--bg-alt: #0f172a;--bg-grad-a: #020617;--bg-grad-b: #0f172a;--bg-grad-c: #111827;--panel: rgba(15, 23, 42, .78);--panel-strong: rgba(17, 24, 39, .94);--surface: rgba(2, 6, 23, .62);--surface-strong: rgba(15, 23, 42, .98);--surface-soft: rgba(148, 163, 184, .08);--surface-input: rgba(15, 23, 42, .9);--surface-chip: rgba(2, 6, 23, .72);--line: rgba(148, 163, 184, .16);--line-soft: rgba(148, 163, 184, .12);--text: #e2e8f0;--text-strong: #ffffff;--muted: #94a3b8;--shadow: 0 24px 70px rgba(2, 6, 23, .42);--button-primary-text: #04211a;--chip-text: #dbeafe;--input-text: #e2e8f0}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{min-height:100vh;color:var(--text);background:transparent}button,input{font:inherit}a{color:inherit}.page-shell{min-height:100vh;padding:88px 24px 24px}.theme-switcher{position:fixed;top:18px;right:18px;z-index:50;display:inline-flex;gap:6px;padding:8px;border-radius:999px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.theme-option{display:inline-flex;align-items:center;gap:8px;border:0;background:transparent;color:var(--muted);padding:10px 14px;border-radius:999px;cursor:pointer;transition:background .16s ease,color .16s ease,transform .16s ease}.theme-option:hover{transform:translateY(-1px);background:var(--surface-soft);color:var(--text)}.theme-option-active{background:linear-gradient(135deg,#38bdf829,#22c55e2e);color:var(--text-strong)}.theme-option span{font-size:.9rem;font-weight:700}.theme-option svg{font-size:1rem}.hero-frame{max-width:1120px;margin:0 auto}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px}.brand{display:flex;align-items:center;gap:14px}.brand-mark{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#38bdf8f2,#22c55eeb);box-shadow:0 16px 30px #22c55e3d;color:#04111c;font-weight:900}.brand-name{font-size:1.02rem;font-weight:800;letter-spacing:.02em;color:var(--text-strong)}.brand-subtitle{color:var(--muted);font-size:.88rem}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:24px}.panel{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border-radius:var(--radius)}.panel-inner{padding:28px}.headline{font-size:clamp(2.2rem,5vw,4.5rem);line-height:.96;margin:0 0 18px;letter-spacing:-.05em}.hero-copy{color:var(--muted);font-size:1.05rem;line-height:1.7;max-width:60ch}.info-row{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 26px}.pill{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:999px;background:var(--surface-soft);border:1px solid var(--line-soft);color:var(--chip-text);font-size:.92rem}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.btn{border:0;border-radius:14px;padding:14px 18px;font-weight:700;cursor:pointer;transition:transform .16s ease,opacity .16s ease,box-shadow .16s ease,background .16s ease}.btn:hover{transform:translateY(-1px)}.btn-primary{background:linear-gradient(135deg,var(--accent-2),var(--accent));color:var(--button-primary-text);box-shadow:0 14px 32px #38bdf833}.btn-secondary{background:var(--surface-soft);color:var(--text);border:1px solid var(--line)}.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line)}.btn-danger{background:#fb71851f;color:#fecdd3;border:1px solid rgba(251,113,133,.22)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.stack{display:grid;gap:16px}.status-card{background:var(--panel-strong);border:1px solid var(--line-soft);border-radius:22px;padding:22px}.status-tag{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;font-size:.88rem;font-weight:700}.status-available{background:#22c55e1f;color:#86efac}.status-completed{background:#fb71851f;color:#fda4af}.status-expired{background:#fbbf241f;color:#fde68a}.kv-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px}.kv{padding:14px;border-radius:16px;background:var(--surface-soft);border:1px solid var(--line-soft)}.kv-label{color:var(--muted);font-size:.82rem;margin-bottom:6px}.kv-value{font-weight:700}.flow{max-width:1120px;margin:0 auto}.flow-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:24px}.card{background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--radius);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.card-inner{padding:24px}.section-title{margin:0 0 8px;font-size:1.4rem}.section-copy{margin:0;color:var(--muted);line-height:1.7}.field{display:grid;gap:8px;margin-top:18px}.field label{font-weight:700;color:var(--text-strong)}.field input{width:100%;padding:14px 16px;border-radius:16px;border:1px solid var(--line);background:var(--surface-input);color:var(--input-text);outline:none}.field input:focus{border-color:#38bdf8a6;box-shadow:0 0 0 4px #38bdf81f}.note{margin-top:10px;color:var(--muted);font-size:.92rem}.alert{border-radius:16px;padding:14px 16px;border:1px solid var(--line-soft);background:var(--surface-soft)}.alert-danger{background:#fb71851c;border-color:#fb71852e;color:#fecdd3}.alert-warning{background:#fbbf241c;border-color:#fbbf2433;color:#fde68a}.alert-success{background:#22c55e1c;border-color:#22c55e33;color:#bbf7d0}.camera-box{overflow:hidden;position:relative;min-height:300px;border-radius:22px;background:linear-gradient(145deg,var(--surface-strong),var(--surface));border:1px solid var(--line)}.camera-box video{width:100%;height:100%;min-height:300px;object-fit:cover;display:block;background:var(--bg-grad-a)}.camera-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;align-items:end;padding:16px;pointer-events:none;background:linear-gradient(180deg,#02061705,#0206178c)}.overlay-chip{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:999px;background:var(--surface-chip);width:fit-content;border:1px solid var(--line)}.checks{display:grid;gap:12px;margin-top:18px}.check-item{display:flex;align-items:flex-start;gap:12px;padding:14px 16px;border-radius:16px;background:var(--surface-soft);border:1px solid var(--line-soft)}.check-icon{font-size:1.1rem;margin-top:2px}.check-icon.pass{color:var(--accent)}.check-icon.fail{color:var(--danger)}.timer-box{display:grid;gap:12px}.timer-value{font-size:clamp(2.6rem,7vw,4.5rem);letter-spacing:-.05em;font-weight:900}.timer-sub{color:var(--muted)}.progress{height:12px;border-radius:999px;background:var(--surface-soft);overflow:hidden}.progress-bar{height:100%;background:linear-gradient(90deg,var(--accent-2),var(--accent));border-radius:inherit;transition:width .25s ease}.divider{height:1px;background:var(--line-soft);margin:18px 0}.helper-list{margin:0;padding-left:18px;color:var(--muted);line-height:1.7}.notfound-layout{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr);gap:20px}.notfound-hero{position:relative;overflow:hidden}.notfound-hero:before{content:"";position:absolute;inset:auto -20% -35% auto;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(34,197,94,.18),transparent 68%);pointer-events:none}.notfound-guidance{display:grid;gap:12px;margin-top:22px}.notfound-tip{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-radius:18px;background:var(--surface-soft);border:1px solid var(--line-soft)}.notfound-tip svg,.notfound-security svg{margin-top:2px;color:var(--accent);flex:0 0 auto}.notfound-tip-title{font-weight:800;color:var(--text-strong);margin-bottom:4px}.notfound-side{align-self:stretch}.notfound-security{display:flex;gap:10px;align-items:flex-start;margin-top:14px;padding:12px 14px;border-radius:16px;background:#38bdf814;border:1px solid var(--line-soft)}.live-shell{display:grid;gap:20px}.live-title{margin:12px 0 8px;font-size:clamp(1.4rem,3vw,2.4rem);letter-spacing:-.04em}.live-timer{min-width:0;padding:0;border-radius:0;background:transparent;border:0;box-shadow:none}.compact-timer{padding:0}.compact-timer .timer-value{font-size:clamp(1.15rem,3vw,1.5rem);line-height:1}.compact-timer .timer-sub{font-size:.72rem;margin-top:2px}.compact-timer .progress{height:6px;margin-top:4px}.timer-chip{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border-radius:999px;background:var(--surface-strong);border:1px solid var(--line-soft);width:fit-content;font-size:.82rem}.live-grid{display:grid;grid-template-columns:minmax(0,1.35fr) 320px;gap:20px;align-items:start}.live-main-card,.live-side-card{min-height:100%}.question-head,.side-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.question-card{padding:18px 20px;border-radius:20px;background:var(--surface-soft);border:1px solid var(--line-soft)}.question-text{font-size:1.12rem;line-height:1.75;font-weight:600;color:var(--text-strong)}.option-stack{display:grid;gap:12px}.answer-option{display:flex;align-items:center;gap:12px;width:100%;text-align:left;border-radius:18px;padding:14px 16px;border:1px solid var(--line);background:var(--surface-strong);color:var(--text);box-shadow:none}.answer-option:hover{background:var(--surface-soft)}.answer-option-selected{border-color:#22c55e8c;background:#22c55e1f;color:var(--text-strong)}.answer-option-dot{width:12px;height:12px;border-radius:999px;background:#94a3b880;flex:0 0 auto}.answer-option-selected .answer-option-dot{background:var(--accent)}.navigator-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:-2px}.navigator-box{min-height:52px;padding:8px 10px;border-radius:14px;border:1px solid var(--line);background:#fff;color:#0f172a;display:grid;gap:4px;align-content:center;box-shadow:0 10px 20px #0f172a14}.navigator-box:hover{transform:translateY(-1px)}.navigator-box-pending{background:#fff}.navigator-box-attempted{background:#22c55e;color:#052e1f;border-color:#22c55ebf}.navigator-box-active{outline:3px solid rgba(56,189,248,.34);outline-offset:2px}.navigator-number{font-weight:900;font-size:.86rem}.navigator-status{font-size:.72rem;font-weight:700;opacity:.88}.btn-sm{padding:10px 14px;border-radius:12px;font-size:.9rem}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:60;background:#020617b3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);display:grid;place-items:center;padding:20px}.modal-card{width:min(520px,100%);padding:24px;border-radius:24px;background:var(--surface-strong);border:1px solid var(--line);box-shadow:var(--shadow)}.modal-title{margin:14px 0 10px;font-size:1.5rem;letter-spacing:-.03em}.live-webcam{overflow:hidden;position:relative;min-height:180px;border-radius:18px;background:linear-gradient(145deg,var(--surface-strong),var(--surface));border:1px solid var(--line)}.live-webcam video{width:100%;min-height:180px;display:block;object-fit:cover;background:var(--bg-grad-a)}.camera-overlay-tight{padding:12px}@media (max-width: 960px){.hero-grid,.flow-layout,.notfound-layout,.live-grid{grid-template-columns:1fr}.navigator-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (max-width: 640px){.theme-switcher{left:12px;right:12px;justify-content:space-between}.theme-option{flex:1;justify-content:center}.page-shell{padding:86px 14px 14px}.panel-inner,.card-inner{padding:18px}.topbar{align-items:flex-start;flex-direction:column}.kv-grid{grid-template-columns:1fr}.navigator-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.question-head,.side-head{flex-direction:column}.live-timer{min-width:0;width:100%}.modal-card{width:100%}}