:root { color-scheme: light dark; --fg: #1d1d1f; --bg: #fafafa; --muted: #6b6b70; --accent: #2563eb; --line: #d4d4d8; --err: #b91c1c; }
@media (prefers-color-scheme: dark) { :root { --fg: #ececf1; --bg: #111113; --muted: #a1a1aa; --accent: #60a5fa; --line: #3f3f46; --err: #f87171; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 26rem; margin: 12vh auto; padding: 0 16px; }
h1 { font-size: 1.5rem; margin: 0 0 .5rem; }
p { color: var(--muted); }
a { color: var(--accent); }
label { display: block; font-weight: 600; margin: 1.25rem 0 .35rem; }
input { width: 100%; padding: .6rem .7rem; font: inherit; color: inherit; background: transparent; border: 1px solid var(--line); border-radius: 8px; }
button { margin-top: 1rem; width: 100%; padding: .65rem; font: inherit; font-weight: 600; color: #fff; background: var(--accent); border: 0; border-radius: 8px; cursor: pointer; }
.error { color: var(--err); }