:root{color-scheme:light;--ink:#24352f;--muted:#65736b;--paper:#f6f4ed;--accent:#396651;--line:#d5ddd3}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.7 system-ui,-apple-system,sans-serif}a{color:var(--accent);text-underline-offset:4px}header,main,footer{max-width:1060px;margin:auto;padding:28px}header{display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}.brand{font-size:23px;font-weight:750;letter-spacing:-.8px;text-decoration:none}nav{display:flex;gap:20px;flex-wrap:wrap}nav a{font-size:14px}main{min-height:70vh}.eyebrow{text-transform:uppercase;letter-spacing:2px;color:var(--muted);font-size:12px;margin-top:30px}h1{font-size:clamp(36px,6vw,64px);letter-spacing:-2px;line-height:1.08;margin:20px 0;max-width:850px}h2{font-size:25px;line-height:1.3}h3{line-height:1.3}.intro{font-size:20px;color:var(--muted);max-width:720px}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:42px 0}.card{border-top:2px solid var(--accent);padding:18px 0}.card p{color:var(--muted)}article{max-width:780px}article h2{margin-top:36px}footer{font-size:13px;color:var(--muted);border-top:1px solid var(--line)}textarea,input,button{font:inherit}textarea,input{width:100%;padding:12px;border:1px solid var(--line);border-radius:6px;background:white;color:var(--ink)}textarea{min-height:180px;font:14px/1.6 ui-monospace,monospace;resize:vertical}button{background:var(--accent);color:#fff;border:0;border-radius:5px;padding:9px 16px;cursor:pointer;margin:8px 8px 8px 0}button:hover{filter:brightness(.9)}label{display:block;font-size:14px;font-weight:650;margin:14px 0 8px}.result{white-space:pre-wrap;overflow-wrap:anywhere;background:#fff;border:1px solid var(--line);padding:16px;border-radius:5px;min-height:60px}.tool{border-top:1px solid var(--line);margin-top:34px;padding-top:14px}.hint{font-size:13px;color:var(--muted)}.error{color:#a52727}code{font-family:ui-monospace,monospace;font-size:.9em}.reading-list li{margin:15px 0}@media(max-width:650px){header{align-items:flex-start;flex-direction:column}.grid{grid-template-columns:1fr}header,main,footer{padding:22px}nav{gap:14px}}