@import "https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,600;9..144,700&family=Space+Grotesk:wght@400;500;700&display=swap";:root{--page-bg:#020202;--page-bg-soft:#090909;--page-bg-elevated:#111;--surface:#ffffff0b;--surface-strong:#ffffff14;--surface-inverse:#f5f5f5;--line:#ffffff1a;--line-strong:#fff3;--ink:#f4f4f4;--ink-soft:#cbcbcb;--ink-muted:#8f8f8f;--ink-dim:#626262;--shadow-lg:0 28px 90px #0000006b;--display-font:"Fraunces", Georgia, serif;--body-font:"Space Grotesk", "Trebuchet MS", sans-serif;font-family:var(--body-font);color:var(--ink);background:radial-gradient(circle at top left, #ffffff14, transparent 34%), radial-gradient(circle at 86% 14%, #ffffff0f, transparent 18%), linear-gradient(180deg, var(--page-bg), var(--page-bg-soft));font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-weight:400;line-height:1.5}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:radial-gradient(circle at 12% 0,#ffffff17,#0000 24%),radial-gradient(circle at 90% 72%,#ffffff0d,#0000 18%),linear-gradient(#020202 0%,#0a0a0a 52%,#030303 100%);min-width:320px;min-height:100vh;margin:0}body:before,body:after{content:"";pointer-events:none;opacity:1;position:fixed}body:before{opacity:.28;background-image:linear-gradient(#ffffff06 1px,#0000 1px),linear-gradient(90deg,#ffffff06 1px,#0000 1px);background-size:64px 64px;inset:0}body:after{filter:blur(28px);opacity:.42;background:radial-gradient(circle,#ffffff24,#0000 70%);border-radius:999px;width:520px;height:520px;top:-200px;right:-200px}#root{isolation:isolate;min-height:100vh;position:relative}a{color:inherit}h1,h2,h3,p{margin-top:0}h1,h2,h3{font-family:var(--display-font);color:var(--ink)}button,input,textarea{font:inherit}code{background:#ffffff14;border-radius:.55rem;padding:.18rem .38rem}::selection{color:#fff;background:#fff3}.shell{gap:26px;width:min(1220px,100% - 32px);margin:0 auto;padding:28px 0 64px;display:grid}.hero-panel,.workspace,.quiz-panel{z-index:1;position:relative}.hero-panel{grid-template-columns:minmax(0,1.4fr) minmax(320px,.88fr);gap:20px;display:grid}.hero-copy,.hero-card,.panel{border:1px solid var(--line);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:var(--shadow-lg);background:linear-gradient(#ffffff16,#ffffff07);border-radius:30px;position:relative;overflow:hidden}.hero-copy:before,.hero-card:before,.panel:before{content:"";border-radius:inherit;pointer-events:none;background:linear-gradient(#ffffff14,#0000);height:140px;position:absolute;inset:1px 1px auto}.hero-copy:after{content:"";opacity:.7;pointer-events:none;background:radial-gradient(circle,#ffffff24,#0000 68%);border-radius:50%;width:360px;height:360px;position:absolute;top:-180px;right:-130px}.hero-copy>*,.hero-card>*,.panel>*{z-index:1;position:relative}.hero-copy{padding:38px}.brand-lockup{align-items:center;gap:16px;margin-bottom:22px;display:inline-flex}.brand-mark{filter:drop-shadow(0 16px 26px #00000047);width:74px;height:74px}.brand-name,.brand-tag{text-transform:uppercase;margin:0}.brand-name{letter-spacing:.44em;color:var(--ink);font-size:1rem;font-weight:700}.brand-tag{letter-spacing:.24em;color:var(--ink-muted);margin-top:6px;font-size:.8rem;display:inline-block}.eyebrow,.section-kicker,.card-kicker{letter-spacing:.16em;text-transform:uppercase;color:var(--ink-muted);margin:0;font-size:.78rem}.hero-copy h1{max-width:12ch;margin:16px 0 20px;font-size:clamp(2.7rem,5vw,5rem);line-height:.93}.hero-text,.quiz-summary,.source-digest{max-width:60ch;color:var(--ink-soft)}.hero-text{font-size:1.04rem}.hero-chips{flex-wrap:wrap;gap:10px;margin-top:28px;display:flex}.hero-chips span,.status-pill,.meta-pill,.source-status,.difficulty-pill,.choice-letter{border-radius:999px;justify-content:center;align-items:center;display:inline-flex}.hero-chips span,.status-pill,.meta-pill,.source-status{border:1px solid var(--line);color:var(--ink-soft);background:#fff1;padding:8px 12px;font-size:.88rem}.hero-card{align-content:start;gap:18px;padding:30px;display:grid}.hero-stat{font-size:clamp(1.95rem,2.4vw,3rem);line-height:1;font-family:var(--display-font);color:var(--ink);margin:0}.hero-meta{color:var(--ink-soft);margin:0}.hero-grid{gap:12px;display:grid}.hero-grid article{border:1px solid var(--line);background:#ffffff0d;border-radius:20px;grid-template-columns:50px 1fr;gap:14px;padding:16px 18px;display:grid}.hero-grid strong{letter-spacing:.16em;border:1px solid var(--line-strong);background:#ffffff16;border-radius:999px;justify-content:center;align-items:center;width:50px;height:50px;font-size:.82rem;display:inline-flex}.hero-grid span{color:var(--ink-soft)}.workspace{grid-template-columns:minmax(0,1.45fr) minmax(300px,.9fr);align-items:start;gap:20px;display:grid}.panel{padding:30px}.panel-header,.quiz-header,.form-actions,.quiz-actions,.source-head,.question-head{gap:14px;display:flex}.panel-header,.quiz-header{justify-content:space-between;align-items:start;margin-bottom:24px}.panel-header>div,.quiz-header>div{min-width:0}.panel-header h2,.quiz-header h2,.tips-card h3{margin:8px 0 0;font-size:1.85rem}.status-pill{text-align:left;border-radius:18px;justify-content:flex-start;max-width:320px;line-height:1.4}.field{gap:10px;margin-bottom:18px;display:grid}.ai-box{border:1px solid var(--line);background:linear-gradient(#ffffff13,#ffffff08);border-radius:24px;gap:18px;margin-bottom:22px;padding:20px;display:grid}.ai-box__header{justify-content:space-between;align-items:start;gap:12px;display:flex}.ai-box__header span{color:var(--ink-muted);text-transform:uppercase;letter-spacing:.12em;font-size:.84rem;display:block}.ai-box__header strong{color:var(--ink);margin-top:4px;font-size:1.2rem;display:block}.engine-pill{border:1px solid var(--line);color:var(--ink-soft);text-transform:capitalize;background:#fff1;border-radius:999px;padding:9px 12px;font-size:.84rem}.engine-pill--ready{color:#050505;background:#f2f2f2;border-color:#0000}.engine-pill--loading,.engine-pill--generating{color:var(--ink);background:linear-gradient(135deg,#ffffff29,#ffffff0f);border-style:dashed}.engine-pill--error,.engine-pill--unsupported{color:var(--ink-muted);background:#ffffff09;border-style:dashed}.model-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}.model-card{text-align:left;border:1px solid var(--line);cursor:pointer;background:#ffffff0d;border-radius:20px;gap:8px;padding:16px;display:grid}.model-card strong,.model-card small{display:block}.model-card strong{color:var(--ink)}.model-card small{color:var(--ink-soft);line-height:1.45}.model-card.is-active{background:linear-gradient(#fff,#dcdcdc);border-color:#0000;box-shadow:0 18px 34px #00000038}.model-card.is-active strong,.model-card.is-active small{color:#111}.ai-progress{gap:10px;display:grid}.ai-progress p{margin:0}.progress-row{align-items:center;gap:12px;display:flex}.progress-track{background:#ffffff14;border-radius:999px;flex:1;height:12px;overflow:hidden}.progress-track span{border-radius:inherit;background:linear-gradient(90deg,#6e6e6e,#f5f5f5);height:100%;display:block}.field>span{color:var(--ink);font-size:.92rem;font-weight:700}input[type=text],textarea,input[type=range],.dropzone,.choice-card,.difficulty-pill,.secondary-button,.primary-button{transition:transform .16s,border-color .16s,box-shadow .16s,background .16s,color .16s}input[type=text],textarea{box-sizing:border-box;border:1px solid var(--line);width:100%;font:inherit;color:var(--ink);resize:vertical;background:#ffffff0b;border-radius:18px;padding:14px 16px}input[type=text]::placeholder,textarea::placeholder{color:var(--ink-dim)}input[type=range]{accent-color:#f5f5f5;width:100%}input[type=text]:focus-visible,textarea:focus-visible,input[type=range]:focus-visible,.primary-button:focus-visible,.secondary-button:focus-visible,.choice-card:focus-visible,.difficulty-pill:focus-visible{outline-offset:2px;outline:2px solid #fff}.two-column{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.choice-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.choice-card{text-align:left;border:1px solid var(--line);cursor:pointer;background:#ffffff0b;border-radius:20px;padding:16px}.choice-card strong,.choice-card small{display:block}.choice-card strong{color:var(--ink);margin-bottom:6px;font-size:1rem}.choice-card small{color:var(--ink-soft);line-height:1.4}.choice-card:hover,.difficulty-pill:hover,.secondary-button:hover,.primary-button:hover,.dropzone:hover,.model-card:hover{transform:translateY(-1px);box-shadow:0 14px 32px #00000040}.choice-card.is-active{background:linear-gradient(#f6f6f6,#dcdcdc);border-color:#0000}.choice-card.is-active strong,.choice-card.is-active small{color:#101010}.difficulty-row{flex-wrap:wrap;gap:10px;display:flex}.difficulty-pill{border:1px solid var(--line);font:inherit;color:var(--ink-soft);cursor:pointer;background:#ffffff0b;padding:10px 14px}.difficulty-pill.is-active{color:#101010;background:#f5f5f5;border-color:#0000}.dropzone{cursor:pointer;background:linear-gradient(#ffffff0d,#ffffff06);border:2px dashed #ffffff2e;border-radius:24px;gap:6px;padding:22px;display:grid}.dropzone input{display:none}.dropzone.is-active{background:#ffffff16;border-color:#ffffff4d}.dropzone strong{color:var(--ink);font-size:1rem}.dropzone small,.helper-text,.source-item small,.empty-state small{color:var(--ink-soft);line-height:1.5}.error-banner{color:var(--ink);background:#ffffff0d;border:1px dashed #fff3;border-radius:18px;margin:0;padding:14px 16px}.form-actions,.quiz-actions{justify-content:space-between;align-items:center}.primary-button,.secondary-button{font:inherit;cursor:pointer;border-radius:18px;padding:14px 18px;font-weight:700}.primary-button{color:#050505;background:linear-gradient(#fff,#d7d7d7);border:none}.primary-button:disabled{cursor:wait;opacity:.72}.secondary-button{color:var(--ink);border:1px solid var(--line);background:#ffffff0b}.source-panel{gap:18px;display:grid}.empty-state,.tips-card,.source-item,.question-card{border:1px solid var(--line);background:#ffffff0b;border-radius:22px}.empty-state,.tips-card{padding:18px}.source-list{gap:12px;margin:0;padding:0;list-style:none;display:grid}.source-item{padding:16px}.source-head{justify-content:space-between;align-items:center;margin-bottom:10px}.source-item p,.tips-card ul{margin:0}.source-status--ready{color:var(--ink);background:#ffffff24}.source-status--pending{color:var(--ink-soft);background:#ffffff12}.source-status--unsupported,.source-status--error{color:var(--ink-muted);background:#ffffff06;border-style:dashed}.tips-card ul{color:var(--ink-soft);padding-left:18px}.quiz-panel{padding:30px}.quiz-header{margin-bottom:18px}.score-card{color:#090909;background:linear-gradient(#fff,#ddd);border-radius:22px;gap:4px;min-width:190px;padding:18px;display:grid;box-shadow:0 18px 38px #0000003d}.score-card span,.score-card small{color:#505050}.score-card strong{font-size:2.45rem;line-height:1;font-family:var(--display-font);color:#090909}.questions-grid{gap:16px;margin-top:22px;display:grid}.question-card{gap:16px;padding:20px;display:grid}.question-card.is-correct{background:linear-gradient(#ffffff17,#ffffff0b);border-color:#ffffff3d}.question-card.is-wrong{background:#ffffff08;border-color:#ffffff1f}.question-head{flex-direction:column;margin:0}.question-head span{color:var(--ink-muted);font-size:.9rem}.question-head strong{color:var(--ink);font-size:1.12rem}.choices{gap:10px;display:grid}.choice-option{border:1px solid var(--line);cursor:pointer;background:#ffffff0a;border-radius:18px;grid-template-columns:auto auto 1fr;align-items:center;gap:12px;padding:12px 14px;display:grid}.choice-option input{accent-color:#fff;margin:0}.choice-option.is-selected{border-color:var(--line-strong);background:#ffffff16}.choice-option.is-correct{color:#101010;background:linear-gradient(#f6f6f6,#ddd);border-color:#0000}.choice-option.is-wrong{opacity:.78;border-style:dashed}.choice-letter{background:#ffffff17;width:30px;height:30px;font-weight:700}.choice-option.is-correct .choice-letter{background:#0000001a}.explanation{border:1px solid var(--line);color:var(--ink-soft);background:#ffffff0a;border-radius:16px;margin:0;padding:14px 16px}@media (width<=980px){.hero-panel,.workspace,.model-grid,.choice-grid,.two-column{grid-template-columns:1fr}.panel-header,.quiz-header,.form-actions,.quiz-actions{flex-direction:column;align-items:stretch}.status-pill,.meta-pill{max-width:none}.ai-box__header{flex-direction:column}.score-card{min-width:0}}@media (width<=640px){.shell{width:min(100% - 20px,1220px);padding-top:20px}.hero-copy,.hero-card,.panel,.quiz-panel{border-radius:24px;padding:22px}.brand-lockup{gap:12px}.brand-mark{width:62px;height:62px}}