:root{color-scheme:light;--ink:#171717;--muted:#555;--line:#ccc;--paper:#fff;--wash:#f3f3f3;--warning:#7b2e0a;--focus:#075baf}
video{display:block;width:100%;height:auto;max-height:75vh;background:#171717}a{color:#075baf;overflow-wrap:anywhere}a:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
header{display:flex;justify-content:space-between;gap:1rem;align-items:center;border-bottom:1px solid var(--line);padding:1.25rem 4vw}header strong{font-size:1.1rem}header span{font-size:.75rem;letter-spacing:.08em;color:var(--muted)}
main{max-width:1150px;margin:auto;padding:2.5rem 2rem}h1{font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.15;letter-spacing:-.03em;margin:0 0 .75rem}h2{font-size:1.1rem;line-height:1.4;margin:0 0 .6rem}h3{font-size:1rem;margin:1.3rem 0 .3rem}.intro{color:var(--muted);max-width:700px;margin:0 0 2rem}
.workspace{display:grid;grid-template-columns:1fr 1fr;border-top:2px solid var(--ink);border-bottom:1px solid var(--line)}.workspace section{padding:1.6rem 1.8rem 1.8rem 0}.workspace section+section{border-left:1px solid var(--line);padding-left:1.8rem;padding-right:0}.workspace p{margin:.4rem 0 1rem}.workspace section>p{color:var(--muted);font-size:.9rem}
label{display:block;font-weight:600;margin:1.1rem 0 .4rem}label span{font-weight:400;color:var(--muted)}textarea,input{width:100%;border:1px solid #777;border-radius:3px;padding:.8rem;font:inherit;color:inherit;background:#fff}textarea{resize:vertical;min-height:220px;line-height:1.5}button{font:inherit;min-height:44px;padding:.5rem .8rem;border:1px solid #777;border-radius:3px;background:#fff;cursor:pointer;color:inherit}.primary{background:var(--ink);color:#fff;width:100%;font-weight:600;min-height:48px}.row{display:flex;flex-wrap:wrap;gap:.6rem;margin:.5rem 0 1rem}.row button{font-size:.85rem}.help{font-size:.85rem;color:var(--muted)}button:disabled{opacity:.6;cursor:wait}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
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