:root{--bg:#eef3f9;--card:#fff;--text:#172b46;--muted:#5f7389;--line:#d6e0ec;--accent:#1d4f91;--accent-text:#fff;--danger-bg:#fff0ed;--danger:#924638;color-scheme:light dark}
@media (prefers-color-scheme:dark){:root{--bg:#0f1722;--card:#17212f;--text:#e4ecf6;--muted:#9aaabd;--line:#2a3a4f;--accent:#7fb0ff;--accent-text:#0f1722;--danger-bg:#3a2320;--danger:#ffb4a4}}
[hidden]{display:none!important}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;padding:24px 16px;background:var(--bg);color:var(--text);font:15px/1.6 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
.card{width:100%;max-width:420px;background:var(--card);border:1px solid var(--line);border-radius:20px;padding:28px}.card.wide{max-width:640px}
.brand{margin:0;color:var(--accent);font-weight:700;letter-spacing:.04em}h1{margin:4px 0 8px;font-size:24px}h2{font-size:16px;margin:24px 0 8px}
.muted{color:var(--muted)}.small{font-size:13px}label{display:block;margin:14px 0;font-weight:600;font-size:14px}
input{display:block;width:100%;margin-top:6px;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:transparent;color:inherit;font:inherit}
.button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:0 16px;border:1px solid var(--line);border-radius:10px;background:transparent;color:inherit;font:inherit;font-weight:600;text-decoration:none;white-space:nowrap;cursor:pointer}
.button.primary{width:100%;background:var(--accent);border-color:var(--accent);color:var(--accent-text)}.button.google{width:100%;margin-top:8px}.button:disabled{opacity:.6;cursor:wait}
.alert{background:var(--danger-bg);color:var(--danger);padding:10px 12px;border-radius:10px}
.divider{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px}.divider::before,.divider::after{content:"";flex:1;border-top:1px solid var(--line)}
.facts{display:grid;grid-template-columns:auto 1fr;gap:8px 16px;align-items:center}.facts dt{color:var(--muted)}.facts dd{margin:0;overflow-wrap:anywhere}
.inline{display:flex;gap:8px}.inline input{margin:0}
.products{list-style:none;padding:0;margin:0;display:grid;gap:8px}.products li{display:flex;justify-content:space-between;gap:12px;padding:10px 12px;border:1px solid var(--line);border-radius:10px}
.products a{color:var(--accent);font-weight:600}.actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.plain{border:0;padding:0;margin:16px 0}code{font-family:ui-monospace,monospace;font-size:.95em}