:root{color-scheme:light;--ink:#132335;--muted:#536579;--accent:#184ee8;--line:#d9e1eb;--paper:#f6f8fc}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font:16px/1.65 system-ui,-apple-system,"Segoe UI",sans-serif}header,main,footer{max-width:1180px;margin:auto}header{display:flex;justify-content:space-between;align-items:center;padding:28px 32px;border-bottom:1px solid var(--line)}a{color:inherit}.brand{font-size:24px;font-weight:800;text-decoration:none;letter-spacing:-1px}.brand span{color:var(--accent)}.stage,.mode{font-size:14px}.intro{padding:72px 32px 64px;max-width:770px}.eyebrow{font-size:14px;font-weight:700;letter-spacing:1.4px;color:var(--accent);margin:0 0 14px}h1{font-size:clamp(48px,7vw,82px);line-height:1.1;letter-spacing:-3px;margin:0 0 24px}h2{font-size:30px;line-height:1.3;letter-spacing:-.7px;margin:0}h3{font-size:22px;line-height:1.4;margin:16px 0}p{margin:0 0 20px}.intro>p:not(.eyebrow){font-size:20px;color:var(--muted);max-width:620px}.primary{background:var(--accent);color:white;border:0;border-radius:7px;padding:13px 22px;font-weight:650;text-decoration:none;display:inline-block;font-size:16px;cursor:pointer}button{font:inherit;cursor:pointer}button:hover,.primary:hover{filter:brightness(.95)}button:focus-visible,a:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #b04900;outline-offset:3px}#demo{padding:32px}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px}.mode{background:#e3eafb;color:#24428d;padding:6px 12px;border-radius:5px;white-space:nowrap}.notice{font-size:14px;color:var(--muted);max-width:820px}.workspace{display:grid;grid-template-columns:40% 60%;border:1px solid var(--line);border-radius:12px;background:white;overflow:hidden;min-height:470px}.brief-panel,.output-panel{padding:28px}.brief-panel{border-right:1px solid var(--line);background:#f0f4fa}label{display:block;font-size:14px;font-weight:650;margin-bottom:8px}select,textarea{font:inherit;width:100%;border:1px solid #bac8d9;border-radius:6px;padding:12px;background:white;color:var(--ink);margin-bottom:22px}textarea{font-size:16px;resize:vertical;line-height:1.65}.small{font-size:14px;color:var(--muted);margin:16px 0 0}.output-panel{display:flex;align-items:flex-start}.output-panel>div{width:100%}#empty{padding-top:65px;color:var(--muted)}.number{font-size:14px;letter-spacing:2px;color:var(--accent)}#empty h3{color:var(--ink)}.result-top{display:flex;align-items:center;justify-content:space-between;gap:16px}.result-top h3{margin-top:0}.result-top button{padding:7px 12px;background:white;border:1px solid var(--line);border-radius:6px;font-size:14px}#sections h4{margin:20px 0 8px;font-size:14px;color:var(--accent);text-transform:uppercase;letter-spacing:.6px}#sections p{white-space:pre-line;font-size:16px}#copy-status{font-size:14px;color:var(--muted)}.approach{margin:40px 32px 60px;padding-top:32px;border-top:1px solid var(--line);display:grid;grid-template-columns:40% 60%;gap:0}.approach>div:last-child{padding-left:28px;color:var(--muted)}footer{padding:24px 32px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;font-size:14px;color:var(--muted)}[hidden]{display:none!important}@media(max-width:720px){header{padding:20px}.intro{padding:48px 20px}h1{letter-spacing:-2px}h2{font-size:26px}#demo{padding:20px}.section-heading{align-items:flex-start;flex-direction:column}.workspace,.approach{grid-template-columns:1fr}.brief-panel{border-right:0;border-bottom:1px solid var(--line)}.brief-panel,.output-panel{padding:20px}#empty{padding-top:12px}.approach{margin:32px 20px}.approach>div:last-child{padding:20px 0 0}footer{padding:20px;flex-direction:column}}

.brand{display:inline-flex;align-items:center;gap:10px}.brand-icon{width:36px;height:36px;display:block;flex-shrink:0}footer{flex-wrap:wrap}footer .brand-icon{width:28px;height:28px}footer .brand{font-size:18px}footer a{white-space:nowrap}
:root{--ink:#102b38;--accent:#126354;--paper:#fafcfc;--muted:#4a626d;--line:#d8e3e6}.brief-panel{background:#f0f6f4}.mode{background:#e5f3ee;color:#126354}
@media(max-width:420px){header{flex-wrap:wrap;gap:12px}}

.demo-controls{display:flex;align-items:center;gap:20px}.language-label{font-size:12px;margin:0}.language-label select{display:block;width:auto;margin:4px 0 0;padding:6px 10px;font-size:14px}.skip{position:absolute;top:0;left:20px;transform:translateY(-150%);padding:10px;background:white;z-index:5}.skip:focus{transform:none}@media(max-width:720px){header{flex-wrap:wrap;gap:16px}.demo-controls{width:100%;justify-content:space-between;gap:12px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.back-link{font-size:14px;color:var(--muted);text-decoration:none;font-weight:600;margin-right:12px}
.back-link:hover{color:var(--accent);text-decoration:underline}
.engine-indicator{display:inline-flex;align-items:center;gap:8px}
.engine-badge{font-size:12px;font-weight:700;color:var(--ink);background:#e2ecf0;padding:4px 10px;border-radius:12px;border:1px solid var(--line)}
.cache-badge{font-size:11px;font-weight:750;color:var(--accent);background:#e5f3ee;padding:3px 8px;border-radius:12px}
.reasoning-pipeline{background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px;margin-bottom:18px}
.pipeline-step{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);padding:4px 0}
.pipeline-step.active{color:var(--ink);font-weight:600}
.pipeline-step.completed{color:var(--accent)}
.step-dot{width:8px;height:8px;border-radius:50%;background:#d8e3e6;flex-shrink:0}
.pipeline-step.active .step-dot{background:#ff9e00;animation:pulse 1s infinite}
.pipeline-step.completed .step-dot{background:var(--accent)}
.streaming-cursor{display:inline-block;width:7px;height:16px;background:var(--accent);vertical-align:middle;margin-left:4px;animation:blink 0.7s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}
@keyframes pulse{0%{opacity:1}50%{opacity:.3}100%{opacity:1}}