:root{--max: 980px;--bd: #e6e6e6;--mut: #666}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;margin:0;color:#111}header,main,footer{max-width:var(--max);margin:0 auto;padding:28px 18px}header{padding-top:42px}.tag{display:inline-block;border:1px solid var(--bd);border-radius:999px;padding:6px 10px;color:var(--mut);font-size:13px}h1{font-size:38px;line-height:1.1;margin:14px 0 10px}p{color:var(--mut);font-size:16px;line-height:1.5;margin:0 0 16px}.row{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.btn{display:inline-block;border:1px solid #111;border-radius:10px;padding:10px 14px;text-decoration:none;color:#111;font-weight:600;cursor:pointer}.btn.secondary{border-color:var(--bd);color:#111;font-weight:600}.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:12px;margin-top:22px}.card{border:1px solid var(--bd);border-radius:14px;padding:14px;grid-column:span 6}.card h3{margin:0 0 6px;font-size:16px}.card small{color:var(--mut)}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace;font-size:13px}.box{border:1px dashed var(--bd);border-radius:14px;padding:14px;margin-top:18px}textarea{width:100%;min-height:120px;border:1px solid var(--bd);border-radius:12px;padding:10px;font-size:14px}button{border:1px solid #111;background:#111;color:#fff;border-radius:10px;padding:10px 14px;font-weight:700;cursor:pointer}pre{white-space:pre-wrap;word-break:break-word;margin:10px 0 0}footer{border-top:1px solid var(--bd);color:var(--mut);padding-bottom:42px}@media (max-width: 820px){.card{grid-column:span 12}h1{font-size:32px}}.mt10{margin-top:20px}