:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color-scheme:light dark}body{margin:0}.app{max-width:640px;margin:0 auto;padding:2rem 1rem}.card{border:1px solid rgba(128,128,128,.3);border-radius:12px;padding:1rem 1.5rem;margin-top:1.5rem}dl{display:grid;grid-template-columns:auto 1fr;gap:.25rem 1rem}dt{font-weight:600;opacity:.7}dd{margin:0}.error{color:#d33}