:root{color-scheme:light;--bg: #fafafa;--bg-sunken: #f1f1f2;--surface: #ffffff;--surface-glass: rgba(255, 255, 255, .72);--surface-hover: #f4f4f5;--fg: #0a0a0a;--fg-soft: #3f3f46;--fg-muted: #71717a;--border: #e4e4e7;--border-hover: #c8c8cd;--accent: #0a0a0a;--accent-fg: #fafafa;--danger: #b42318;--danger-bg: #fef3f2;--track: #e8e8ea;--shadow-sm: 0 1px 2px rgba(9, 9, 11, .06), 0 1px 3px rgba(9, 9, 11, .04);--shadow-md: 0 2px 4px rgba(9, 9, 11, .04), 0 8px 20px -8px rgba(9, 9, 11, .12);--shadow-lg: 0 4px 8px rgba(9, 9, 11, .04), 0 24px 48px -16px rgba(9, 9, 11, .16);--shadow-focus: 0 0 0 4px rgba(9, 9, 11, .09);--ambient: radial-gradient(60% 45% at 12% 0%, rgba(9, 9, 11, .07), transparent 70%), radial-gradient(45% 40% at 92% 12%, rgba(9, 9, 11, .05), transparent 70%), radial-gradient(55% 50% at 50% 105%, rgba(9, 9, 11, .06), transparent 70%);--font-display: "Outfit", system-ui, sans-serif;--font-body: "Work Sans", system-ui, sans-serif;--r-sm: 10px;--r-md: 16px;--r-lg: 24px;--r-xl: 32px;--r-full: 999px;--header-h: 68px;--ease: cubic-bezier(.22, 1, .36, 1);--t-fast: .16s var(--ease);--t: .24s var(--ease);--safe-t: env(safe-area-inset-top, 0px);--safe-b: env(safe-area-inset-bottom, 0px);--safe-l: env(safe-area-inset-left, 0px);--safe-r: env(safe-area-inset-right, 0px)}@media(max-width:480px){:root{--header-h: 58px}}[data-theme=dark]{color-scheme:dark;--bg: #09090b;--bg-sunken: #050506;--surface: #141416;--surface-glass: rgba(24, 24, 27, .72);--surface-hover: #1c1c20;--fg: #fafafa;--fg-soft: #d4d4d8;--fg-muted: #a1a1aa;--border: #27272a;--border-hover: #3f3f46;--accent: #fafafa;--accent-fg: #09090b;--danger: #fda29b;--danger-bg: rgba(240, 68, 56, .12);--track: #232326;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);--shadow-md: 0 2px 6px rgba(0, 0, 0, .4), 0 12px 28px -12px rgba(0, 0, 0, .7);--shadow-lg: 0 4px 10px rgba(0, 0, 0, .45), 0 32px 60px -20px rgba(0, 0, 0, .8);--shadow-focus: 0 0 0 4px rgba(250, 250, 250, .14);--ambient: radial-gradient(60% 45% at 12% 0%, rgba(250, 250, 250, .09), transparent 70%), radial-gradient(45% 40% at 92% 12%, rgba(250, 250, 250, .06), transparent 70%), radial-gradient(55% 50% at 50% 105%, rgba(250, 250, 250, .05), transparent 70%)}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}html{overflow-x:hidden}body{margin:0;min-height:100vh;font-family:var(--font-body);font-size:16px;line-height:1.6;color:var(--fg);background:var(--bg);-webkit-font-smoothing:antialiased;overflow-x:hidden;overflow-y:auto;-webkit-tap-highlight-color:transparent}#root{min-height:100vh;min-height:100dvh}a{color:inherit;text-decoration:none;-webkit-tap-highlight-color:transparent}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}h1,h2,h3,h4{margin:0;font-family:var(--font-display);font-weight:600;line-height:1.1;letter-spacing:-.025em;text-wrap:balance}p{margin:0}:focus-visible{outline:2px solid var(--fg);outline-offset:3px}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}.app-shell{position:relative;min-height:100vh;display:flex;flex-direction:column;isolation:isolate}.app-shell:before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background:var(--ambient),linear-gradient(180deg,var(--bg),var(--bg-sunken))}.site-header{position:sticky;top:0;z-index:40;height:calc(var(--header-h) + var(--safe-t));display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:var(--safe-t) max(clamp(1rem,4vw,2rem),var(--safe-r)) 0 max(clamp(1rem,4vw,2rem),var(--safe-l));border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--bg) 72%,transparent);-webkit-backdrop-filter:blur(20px) saturate(1.4);backdrop-filter:blur(20px) saturate(1.4)}.brand{display:inline-flex;align-items:center;gap:.7rem;font-family:var(--font-display);font-weight:700;font-size:1.15rem;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap}.brand-mark{width:34px;height:34px;border-radius:11px;background:var(--fg);color:var(--bg);display:grid;place-items:center;font-size:.9rem;font-weight:600;box-shadow:var(--shadow-sm)}.header-actions{display:flex;align-items:center;gap:.5rem}.header-user{font-size:.85rem;padding:0 .35rem}.header-actions .btn-ghost.is-active{color:var(--fg);text-decoration:underline;text-underline-offset:.2em}.main{flex:1;width:min(1120px,calc(100% - 2rem));margin:0 auto;padding:clamp(1.5rem,4vw,3rem) var(--safe-r) calc(clamp(3rem,7vw,5rem) + var(--safe-b)) var(--safe-l)}.main-flush{width:100%;padding:0;display:flex;min-height:0}.btn,.icon-btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:44px;padding:.7rem 1.25rem;border:1px solid var(--border);border-radius:var(--r-full);background:var(--surface);color:var(--fg);font-family:var(--font-display);font-weight:500;letter-spacing:-.01em;box-shadow:var(--shadow-sm);transition:background var(--t-fast),border-color var(--t-fast),color var(--t-fast),transform var(--t-fast),box-shadow var(--t-fast)}.icon-btn{width:44px;padding:0;border-radius:var(--r-full)}.btn:hover,.icon-btn:hover{border-color:var(--border-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn:active,.icon-btn:active{transform:translateY(0)}.btn-primary{background:var(--accent);color:var(--accent-fg);border-color:var(--accent);font-weight:600}.btn-primary:hover{border-color:var(--accent);box-shadow:var(--shadow-lg)}.btn-ghost{background:transparent;border-color:transparent;box-shadow:none;color:var(--fg-muted)}.btn-ghost:hover{background:var(--surface-hover);border-color:transparent;color:var(--fg);box-shadow:none;transform:none}.btn-danger{color:var(--danger);border-color:color-mix(in srgb,var(--danger) 35%,transparent)}.btn-danger:hover{background:var(--danger-bg);border-color:var(--danger)}.btn-sm{min-height:38px;padding:.4rem .9rem;font-size:.9rem}.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:var(--shadow-sm)}.eyebrow{display:inline-flex;align-items:center;gap:.45rem;font-size:.75rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-muted)}.muted{color:var(--fg-muted)}.stack-sm{display:grid;gap:.5rem}.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}.home{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(1rem,2.5vw,1.5rem);align-items:stretch}.home-hero{position:relative;display:flex;flex-direction:column;justify-content:space-between;gap:2rem;padding:clamp(1.75rem,4vw,2.75rem);border-radius:var(--r-xl);background:radial-gradient(120% 90% at 100% 0%,rgba(255,255,255,.14),transparent 60%),linear-gradient(165deg,#1c1c20,#0a0a0a);color:#fafafa;overflow:hidden;box-shadow:var(--shadow-lg)}[data-theme=dark] .home-hero{background:radial-gradient(120% 90% at 100% 0%,rgba(250,250,250,.1),transparent 60%),linear-gradient(165deg,#202024,#0c0c0e);border:1px solid var(--border)}.home-hero:after{content:"";position:absolute;width:320px;height:320px;right:-120px;bottom:-140px;border-radius:50%;background:radial-gradient(circle,rgba(250,250,250,.12),transparent 65%);pointer-events:none}.home-badge{display:inline-flex;align-items:center;gap:.5rem;align-self:flex-start;padding:.4rem .85rem;border-radius:var(--r-full);border:1px solid rgba(250,250,250,.2);background:#fafafa14;font-size:.78rem;font-weight:500;letter-spacing:.02em}.home-badge:before{content:"";width:7px;height:7px;border-radius:50%;background:#fafafa}.home-title{font-size:clamp(2.5rem,5.5vw,4.25rem);font-weight:600;letter-spacing:-.04em;line-height:1.02}.home-title em{font-style:normal;color:#fafafa73}.home-lead{max-width:34ch;color:#fafafab8;font-size:1.03rem}.home-tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:.6rem}.tile{padding:.9rem 1rem;border-radius:var(--r-md);border:1px solid rgba(250,250,250,.14);background:#fafafa0f;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.tile-value{font-family:var(--font-display);font-size:1.5rem;font-weight:600;letter-spacing:-.03em;line-height:1.1}.tile-label{font-size:.72rem;color:#fafafa99;letter-spacing:.02em}.card{border-radius:var(--r-xl);border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-md)}.home-form{display:flex;flex-direction:column;gap:1.5rem;justify-content:center;padding:clamp(1.5rem,3.5vw,2.5rem)}.home-form-title{font-size:1.6rem}.form-grid{display:grid;gap:1.1rem}.field{display:grid;gap:.45rem;min-width:0}.field>*{min-width:0}.field label{font-size:.85rem;font-weight:600;color:var(--fg-soft)}.field input,.field textarea,.field select{min-height:52px;padding:.8rem 1.05rem;border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg);transition:border-color var(--t-fast),background var(--t-fast),box-shadow var(--t-fast)}.field input::placeholder,.field textarea::placeholder{color:var(--fg-muted);opacity:.7}.field input:hover,.field textarea:hover,.field select:hover{border-color:var(--border-hover)}.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--fg);background:var(--surface);box-shadow:var(--shadow-focus)}.field textarea{min-height:130px;resize:vertical;line-height:1.6}.field-error{display:flex;align-items:center;gap:.35rem;color:var(--danger);font-size:.85rem}.form-actions{display:flex;flex-wrap:wrap;gap:.75rem}.form-actions .btn-block{width:100%;min-height:54px;font-size:1.02rem}.form-note{font-size:.82rem;color:var(--fg-muted);text-align:center}.test-shell{display:flex;flex-direction:column;width:100%;height:calc(100vh - var(--header-h) - var(--safe-t));height:calc(100dvh - var(--header-h) - var(--safe-t));min-height:0}.rail{flex-shrink:0;padding:.85rem max(clamp(1rem,4vw,2rem),var(--safe-r)) .85rem max(clamp(1rem,4vw,2rem),var(--safe-l));border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--bg) 72%,transparent);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.rail-inner{width:min(760px,100%);margin:0 auto;display:grid;gap:.55rem}.rail-meta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.4rem 1rem;font-size:.82rem;color:var(--fg-muted)}.rail-count{font-family:var(--font-display);font-weight:600;color:var(--fg);letter-spacing:-.01em}.rail-track{height:6px;border-radius:var(--r-full);background:var(--track);overflow:hidden}.rail-fill{height:100%;border-radius:var(--r-full);background:var(--fg)}.deck{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;scroll-snap-type:y mandatory;scrollbar-width:none;-webkit-overflow-scrolling:touch}.deck::-webkit-scrollbar{display:none}.deck-slide{min-height:100%;display:grid;place-items:center;padding:clamp(1.25rem,4vw,2.5rem) max(clamp(1rem,4vw,2rem),var(--safe-r)) calc(clamp(1.25rem,4vw,2.5rem) + var(--safe-b)) max(clamp(1rem,4vw,2rem),var(--safe-l));scroll-snap-align:center;scroll-snap-stop:always}.q-card{width:min(760px,100%);display:grid;gap:1.5rem;padding:clamp(1.5rem,4vw,2.5rem);border-radius:var(--r-xl);border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-lg);transition:opacity var(--t),transform var(--t),box-shadow var(--t)}.deck-slide[data-active=false] .q-card{opacity:.35;transform:scale(.96);box-shadow:var(--shadow-sm)}.q-head{display:grid;gap:.6rem}.q-tags{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}.q-num{display:inline-flex;align-items:center;gap:.4rem;padding:.3rem .7rem;border-radius:var(--r-full);background:var(--fg);color:var(--bg);font-family:var(--font-display);font-size:.76rem;font-weight:600}.q-title{font-size:clamp(1.5rem,3.2vw,2.1rem);letter-spacing:-.03em}.q-desc{color:var(--fg-muted)}.options{display:grid;gap:.6rem}.option{display:flex;align-items:center;gap:.9rem;width:100%;min-height:60px;padding:.9rem 1.1rem;text-align:left;border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg);color:var(--fg);font-size:1rem;line-height:1.4;transition:background var(--t-fast),border-color var(--t-fast),color var(--t-fast),transform var(--t-fast),box-shadow var(--t-fast)}.option:hover{border-color:var(--border-hover);background:var(--surface-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.option.is-selected{background:var(--fg);border-color:var(--fg);color:var(--bg);box-shadow:var(--shadow-lg)}.option-key{flex-shrink:0;width:30px;height:30px;display:grid;place-items:center;border-radius:var(--r-sm);border:1px solid var(--border);background:var(--surface);font-family:var(--font-display);font-size:.8rem;font-weight:600;color:var(--fg-muted);transition:all var(--t-fast)}.option.is-selected .option-key{background:var(--bg);border-color:var(--bg);color:var(--fg)}.option-label{flex:1}.option-check{flex-shrink:0;display:grid;place-items:center;width:22px;height:22px}.q-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.75rem}.q-hint{font-size:.85rem;color:var(--fg-muted)}.finish-card{text-align:center;justify-items:center}.finish-ring{width:76px;height:76px;border-radius:50%;display:grid;place-items:center;background:var(--fg);color:var(--bg);box-shadow:var(--shadow-lg)}.finish-stats{display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem}.chip{display:inline-flex;align-items:center;gap:.4rem;padding:.4rem .85rem;border-radius:var(--r-full);border:1px solid var(--border);background:var(--bg);font-size:.82rem;color:var(--fg-soft)}.chip-warn{color:var(--danger);border-color:color-mix(in srgb,var(--danger) 35%,transparent);background:var(--danger-bg)}.retry-overlay{position:fixed;inset:0;z-index:40;display:grid;place-items:center;padding:calc(1.25rem + var(--safe-t)) calc(1.25rem + var(--safe-r)) calc(1.25rem + var(--safe-b)) calc(1.25rem + var(--safe-l));background:color-mix(in srgb,var(--bg) 78%,transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.retry-card{display:grid;gap:1rem;justify-items:center;text-align:center;width:min(440px,100%);padding:clamp(1.5rem,4vw,2.25rem);border-radius:var(--r-xl);border:1px solid color-mix(in srgb,var(--danger) 40%,var(--border));background:var(--surface);box-shadow:var(--shadow-lg)}.retry-card h2{font-size:clamp(1.4rem,4vw,1.85rem)}.retry-mark{width:72px;height:72px;border-radius:50%;display:grid;place-items:center;background:var(--danger-bg);color:var(--danger);border:1px solid color-mix(in srgb,var(--danger) 35%,transparent)}.admin-layout{display:grid;gap:1.75rem;min-width:0;position:relative;z-index:0;touch-action:pan-y}.admin-layout>*{min-width:0}.admin-item-actions{display:flex;flex-wrap:wrap;gap:.4rem;flex:0 1 auto;max-width:100%}.admin-header{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:1rem}.admin-header h1{font-size:clamp(2rem,4vw,2.75rem)}.tabs{display:inline-flex;gap:.25rem;padding:.3rem;border-radius:var(--r-full);border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-sm)}.tab{min-height:40px;padding:.5rem 1.1rem;border:none;border-radius:var(--r-full);background:transparent;color:var(--fg-muted);font-family:var(--font-display);font-size:.92rem;font-weight:500;transition:all var(--t-fast)}.tab:hover{color:var(--fg)}.tab[aria-selected=true]{background:var(--fg);color:var(--bg)}.editor-panel{display:grid;gap:1.1rem;min-width:0;padding:clamp(1.35rem,3vw,2rem);border-radius:var(--r-xl);border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-md)}.editor-panel>*{min-width:0}.editor-panel h2{font-size:1.35rem}.form-row-2{display:grid;grid-template-columns:1fr 1fr;gap:1rem;min-width:0}.form-row-2>*{min-width:0}.options-editor{display:grid;gap:.5rem;min-width:0}.options-editor>*{min-width:0}.options-editor>label{font-size:.85rem;font-weight:600;color:var(--fg-soft)}.option-row{display:grid;grid-template-columns:1fr auto;gap:.5rem;min-width:0}.option-row>*{min-width:0}.option-row-quiz{grid-template-columns:auto 1fr auto;align-items:center}.correct-toggle{display:inline-flex;align-items:center;gap:.35rem;min-height:44px;padding:0 .55rem;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg);font-size:.75rem;font-weight:600;color:var(--fg-muted);white-space:nowrap;cursor:pointer}.correct-toggle:has(input:checked){border-color:var(--fg);color:var(--fg);background:var(--surface-hover)}.correct-toggle input{accent-color:var(--fg)}.badge-ok{border-color:color-mix(in srgb,#16a34a 40%,var(--border));color:#15803d;background:color-mix(in srgb,#16a34a 10%,transparent)}.badge-warn{border-color:color-mix(in srgb,#ca8a04 40%,var(--border));color:#a16207;background:color-mix(in srgb,#ca8a04 10%,transparent)}[data-theme=dark] .badge-ok{color:#86efac}[data-theme=dark] .badge-warn{color:#fde047}.badge-error{border-color:color-mix(in srgb,var(--danger) 45%,var(--border));color:var(--danger);background:var(--danger-bg)}.score-pill{display:inline-flex;align-items:center;min-height:32px;padding:0 .75rem;border-radius:var(--r-full);background:var(--fg);color:var(--bg);font-family:var(--font-display);font-weight:600;font-size:.9rem}.score-block{display:grid;gap:.35rem;justify-items:center}.score-attempt{margin-top:.35rem;font-family:var(--font-display);font-weight:600;font-size:1rem}.score-big{font-family:var(--font-display);font-size:clamp(3rem,8vw,4.5rem);font-weight:600;letter-spacing:-.04em;line-height:1}.admin-list{display:grid;gap:.75rem}.admin-item{display:grid;gap:1rem;padding:1.15rem 1.25rem;border-radius:var(--r-lg);border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-sm);transition:border-color var(--t-fast),box-shadow var(--t-fast),transform var(--t-fast)}.admin-item:hover{border-color:var(--border-hover);box-shadow:var(--shadow-md);transform:translateY(-1px)}.admin-item h3{font-size:1.15rem}.admin-item-top{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:1rem}.admin-item-top>.stack-sm{min-width:0;flex:1 1 220px}.badge{display:inline-flex;align-items:center;gap:.35rem;padding:.25rem .7rem;border-radius:var(--r-full);border:1px solid var(--border);background:var(--bg);font-size:.74rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--fg-muted)}.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--r-lg);border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-sm)}.sessions-table{width:100%;border-collapse:collapse;font-size:.92rem}.sessions-table th,.sessions-table td{text-align:left;padding:1rem;border-bottom:1px solid var(--border);vertical-align:top}.sessions-table tr:last-child td{border-bottom:none}.sessions-table th{font-size:.74rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--fg-muted);background:var(--bg)}.empty-state{padding:clamp(2rem,5vw,3.5rem);border-radius:var(--r-xl);border:1px dashed var(--border);background:var(--surface-glass);color:var(--fg-muted);text-align:center}.success-panel{position:relative;display:grid;gap:1.25rem;justify-items:center;text-align:center;max-width:620px;margin:clamp(1rem,6vw,4rem) auto;padding:clamp(2rem,5vw,3.5rem);border-radius:var(--r-xl);border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-lg)}.success-panel h1{font-size:clamp(2rem,5vw,3rem)}.success-panel .muted{max-width:40ch}.success-mark{width:72px;height:72px;border-radius:50%;display:grid;place-items:center;background:var(--fg);color:var(--bg);box-shadow:var(--shadow-md)}.landing{display:grid;gap:1.5rem}.landing-hero{min-height:auto}.home-test-name{margin-top:.75rem;font-family:var(--font-display);font-size:1.05rem;font-weight:600;letter-spacing:-.02em;color:#fafafae0}.test-catalog{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem}.catalog-card{display:grid;gap:1.1rem;align-content:start;padding:1.35rem}.catalog-card--locked{opacity:.55;filter:grayscale(.85)}.catalog-card--locked h2,.catalog-card--locked .muted{color:var(--fg-muted)}.catalog-locked-btn{cursor:not-allowed;opacity:.85}.badge--open{border-color:color-mix(in srgb,#3d8b5c 35%,var(--border));color:#2f6b48}[data-theme=dark] .badge--open{border-color:color-mix(in srgb,#6bbf8a 40%,var(--border));color:#8fd4a8}.badge--locked{border-color:color-mix(in srgb,var(--fg-muted) 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