:root{color-scheme:light dark;--fg: #16181d;--muted: #6b7280;--line: #e5e7eb;--accent: #0b6bcb;--err: #c62828;--bg: #f7f8fa;--card: #fff}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--fg);background:var(--bg)}.shell{max-width:640px;margin:0 auto;padding:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin:16px 0}h1{font-size:1.35rem;margin:0 0 4px}h2{font-size:1.2rem}.muted{color:var(--muted)}fieldset{border:1px solid var(--line);border-radius:12px;margin:14px 0;padding:12px 14px}legend{font-weight:600;padding:0 6px}.field{display:flex;flex-direction:column;gap:4px;margin:10px 0}.field>span:first-child{font-size:.9rem;font-weight:500}input[type=text],input[type=email],input[type=date],input:not([type]){width:100%;padding:12px;font-size:16px;border:1px solid var(--line);border-radius:10px;background:transparent;color:inherit}.check{display:flex;gap:10px;align-items:flex-start;margin:10px 0;font-size:.95rem}.guardian{border-color:var(--accent)}.err{color:var(--err);font-size:.85rem}.err.server{margin-top:12px}button{width:100%;padding:14px;font-size:1rem;font-weight:600;color:#fff;background:var(--accent);border:0;border-radius:12px;margin-top:16px}button:disabled{opacity:.6}.success h2{margin-top:0}code{background:#7f7f7f26;padding:1px 6px;border-radius:6px}