*{box-sizing:border-box}html{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#f6f7f9;color:#17191c}body{margin:0}.container{max-width:980px;margin:0 auto;padding:40px 20px}.hero{text-align:center;margin:20px 0 30px}.hero h1{font-size:2.4rem;margin:0 0 10px}.hero p{color:#5c6370}.card{background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:24px;box-shadow:0 8px 28px rgba(0,0,0,.05)}label{display:block;font-weight:700;margin:16px 0 8px}select,textarea{width:100%;border:1px solid #ccd1d8;border-radius:10px;padding:12px;font:inherit;background:#fff}textarea{min-height:420px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono",monospace}button{margin-top:16px;border:0;border-radius:10px;padding:12px 18px;font-weight:700;background:#111827;color:#fff;cursor:pointer}.danger{background:#b91c1c}.notice{border-radius:12px;padding:16px;margin:0 0 20px;overflow-wrap:anywhere}.success{background:#ecfdf5;border:1px solid #a7f3d0}.error{background:#fef2f2;border:1px solid #fecaca}.small,.footer,.toolbar{color:#6b7280;font-size:.92rem}.footer{text-align:center;margin-top:24px}.toolbar{margin-bottom:16px}.reader{max-width:920px}.markdown-body{line-height:1.7}.markdown-body h1,.markdown-body h2,.markdown-body h3{line-height:1.25}.markdown-body pre{overflow:auto;background:#111827;color:#f9fafb;padding:16px;border-radius:10px}.markdown-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono",monospace}.markdown-body p code,.markdown-body li code{background:#f3f4f6;padding:.15rem .35rem;border-radius:5px}.markdown-body a{color:#2563eb}.html-frame{width:100%;min-height:78vh;border:1px solid #e5e7eb;border-radius:16px;background:#fff}code{overflow-wrap:anywhere}@media(prefers-color-scheme:dark){html{background:#0f1115;color:#e5e7eb}.card,select,textarea,.html-frame{background:#171a21;color:#e5e7eb;border-color:#2b303b}.hero p,.small,.footer,.toolbar{color:#9ca3af}.markdown-body p code,.markdown-body li code{background:#252a34}.success{background:#10251b;border-color:#24583d}.error{background:#2a1515;border-color:#6b2a2a}}