:root{--bg:#f4f5f8;--card:#fff;--line:#e3e6ee;--text:#1b2030;--muted:#6b7385}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font:14px/1.45 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.placeholder{background:var(--card);border:1px solid var(--line);border-radius:12px;max-width:520px;margin:12vh auto;padding:24px}.placeholder h1{margin:0 0 6px;font-size:22px}.placeholder p{color:var(--muted);margin:0 0 16px}.placeholder dl{grid-template-columns:max-content 1fr;gap:6px 16px;margin:0;display:grid}.placeholder dt{color:var(--muted)}.placeholder dd{margin:0}