:root {
  --bg: #f3f5f8; --surface: #ffffff; --ink: #141a24; --muted: #5a6474; --line: #d9dee6;
  --accent: #2048c7; --accent-ink: #ffffff; --danger: #b42318;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e121a; --surface: #161c27; --ink: #e8ecf2; --muted: #9ba5b5; --line: #283143; --accent: #8faeff; --accent-ink: #0e121a; --danger: #ff8a80; color-scheme: dark; }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; min-height: 100vh; display: grid; place-items: start center; background: var(--bg); color: var(--ink); font: 400 1rem/1.55 var(--font); padding-inline: 16px; padding-block: 12vh 40px; }
.card { width: 100%; max-width: 420px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 28px 24px; display: grid; gap: 14px; }
.eyebrow { font: 500 0.75rem/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
h1 { margin: 0; font-weight: 800; font-size: 2rem; letter-spacing: -0.02em; line-height: 1.1; }
.lede { margin: 0; color: var(--muted); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.msg { margin: 0; min-height: 1.5em; font-size: 0.95rem; }
.msg.error { color: var(--danger); }
.google { min-height: 44px; }
.small { margin: 0; font-size: 0.8rem; color: var(--muted); }