:root{--bg:#f4f6fa;--card:#fff;--text:#1c2333;--muted:#6b7385;--border:#d9dee8;--primary:#1f6feb;--primary-hover:#1858c4;--error:#c62828;--success:#2e7d32}*{box-sizing:border-box}html,body{margin:0}body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:15px}h1,h2{margin:0 0 12px}h2{font-size:18px}.muted{color:var(--muted);font-weight:400}.error{color:var(--error);margin:0}.success{color:var(--success);margin:0}.center{place-items:center;min-height:100vh;padding:16px;display:grid}.card{background:var(--card);border:1px solid var(--border);border-radius:10px;flex-direction:column;gap:14px;min-width:0;padding:20px;display:flex}.login{width:100%;max-width:380px}.login p{margin:-8px 0 4px}label{flex-direction:column;gap:6px;font-weight:500;display:flex}label.inline{flex-direction:row;align-items:center;gap:6px;font-weight:400}input:not([type=checkbox]),textarea{font:inherit;border:1px solid var(--border);color:inherit;background:#fff;border-radius:6px;width:100%;padding:9px 11px}input:focus,textarea:focus{outline:2px solid var(--primary);outline-offset:-1px;border-color:#0000}textarea{resize:vertical}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px}button{font:inherit;background:var(--primary);color:#fff;cursor:pointer;border:0;border-radius:6px;padding:10px 16px;font-weight:600}button:hover:not(:disabled){background:var(--primary-hover)}button:disabled{opacity:.6;cursor:default}button.ghost{color:var(--text);border:1px solid var(--border);background:0 0;padding:6px 12px;font-weight:500}button.ghost:hover{background:var(--bg)}.topbar{background:var(--card);border-bottom:1px solid var(--border);align-items:center;gap:24px;padding:12px 24px;display:flex}.topbar nav{flex:1;gap:8px;display:flex}.topbar nav a{color:var(--muted);border-radius:6px;padding:6px 10px;text-decoration:none}.topbar nav a.active{color:var(--primary);background:#e8f0fe;font-weight:600}.topbar .user{align-items:center;gap:10px;display:flex}.container{max-width:1400px;margin:0 auto;padding:24px}.grid{grid-template-columns:1fr 1fr;align-items:start;gap:20px;display:grid}.row{justify-content:space-between;align-items:center;font-weight:500;display:flex}.preview dl{grid-template-columns:auto 1fr;gap:4px 12px;margin:0;display:grid}.preview dt{color:var(--muted)}.preview dd{word-break:break-word;margin:0}.preview iframe{border:1px solid var(--border);background:#fff;border-radius:6px;width:100%;min-height:480px}@media (max-width:900px){.grid{grid-template-columns:1fr}.topbar{flex-wrap:wrap;gap:12px;padding:12px 16px}.topbar .user .muted{display:none}.container{padding:16px}}