:root{color-scheme:dark;--bg:#000;--surface:#101010;--line:#484848;--text:#fff;--muted:#c4c4c4;--accent:#9c0404}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif}header,main{max-width:1280px;margin:auto;padding:24px 40px}header{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}a{color:inherit;text-underline-offset:4px}a:hover{text-decoration-thickness:2px}.brand{text-decoration:none;font-size:24px;font-weight:800}.brand span{font-size:15px;font-weight:400;color:var(--muted)}.language{display:flex;gap:12px;align-items:center}.intro{padding:24px 0 34px;max-width:74ch}.kicker{color:var(--muted);font-size:14px;margin:0 0 12px}h1{font-size:clamp(32px,4vw,52px);line-height:1.1;letter-spacing:-.03em;margin:0 0 18px}h2{font-size:22px;line-height:1.25;margin:0 0 20px}h3{font-size:17px;margin:0 0 10px}p{margin:0 0 16px;max-width:72ch}.intro p:last-child{margin:0;color:var(--muted)}.workspace{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:40px}.section-heading{display:flex;justify-content:space-between}.section-heading span{color:var(--muted);font-size:14px}label{display:block;font-weight:550;margin-bottom:8px}.example-row{display:flex;gap:10px}.example-row select{flex:1;min-width:0}.hint{font-size:13px;color:var(--muted);margin-top:10px}select,button,textarea{font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--line);border-radius:3px}select,button{min-height:44px;padding:9px 13px}button{cursor:pointer;font-weight:600}button:hover{background:#292929;border-color:#aaa}button:disabled{cursor:default;opacity:.5}button.primary{background:var(--accent);border-color:var(--accent)}button.primary:hover{background:#bd0707}textarea{display:block;width:100%;min-height:355px;resize:vertical;padding:18px;font:14px/1.6 ui-monospace,Consolas,monospace;tab-size:2}textarea[aria-invalid=true]{border-color:#ff9191}.actions{display:flex;gap:10px;flex-wrap:wrap}.review{border-top:3px solid var(--accent);padding-top:20px;min-width:0}#result{min-height:170px;overflow-wrap:anywhere}#result h3{font-size:24px}#result ol{padding-left:24px}#result li{margin-bottom:16px}#result code{display:block;color:var(--muted);font-size:13px}.limits{margin-top:32px;border-top:1px solid var(--line);padding-top:22px}.limits p{color:var(--muted);font-size:14px}footer{margin-top:48px;border-top:1px solid var(--line);padding-top:24px}footer p{font-size:14px;color:var(--muted)}footer>a{font-weight:650}:focus-visible{outline:3px solid #fff;outline-offset:4px}.skip{position:absolute;left:20px;top:-100px;background:#000;padding:12px;z-index:2}.skip:focus{top:10px}@media(max-width:760px){header,main{padding:20px}.workspace{grid-template-columns:1fr;gap:32px}.intro{padding:20px 0 30px}.brand span{display:block;font-size:12px}.language{font-size:13px;gap:7px}textarea{min-height:320px}.example-row{flex-wrap:wrap}.example-row select{flex-basis:70%}.review{padding-top:18px}#result{min-height:100px}footer{margin-top:32px}}@media(prefers-reduced-motion:no-preference){button{transition:background .15s ease-out}}