:root{color-scheme:light dark}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Helvetica Neue,Arial,Noto Sans,"Apple Color Emoji","Segoe UI Emoji"}.container{max-width:960px;margin:40px auto;padding:0 16px}.card{border:1px solid #e5e7eb;border-radius:8px;padding:16px;background:#fff;color:#111}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}input,button,select,textarea{font:inherit;padding:10px 12px;border-radius:6px;border:1px solid #d1d5db}button{background:#2563eb;color:#fff;border:none;cursor:pointer}button:disabled{opacity:.6;cursor:not-allowed}.row{display:flex;align-items:center;gap:12px}.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid #e5e7eb}.muted{color:#6b7280}.error{color:#b91c1c;margin-top:8px}