:root {
  --bg: #f8fafc; --card: #ffffff; --fg: #0f172a; --muted: #475569; --border: #e2e8f0;
  --input: #cbd5e1; --accent: #C20012; --on-accent: #ffffff;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #020617; --card: #000000; --fg: #f1f5f9; --muted: #cbd5e1; --border: #1e293b; --input: #334155; }
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; background: var(--bg); color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
header { border-bottom: 1px solid var(--border); background: var(--card); }
.bar, main { max-width: 28rem; margin: 0 auto; padding: 1rem; }
.bar { font-weight: 600; letter-spacing: -0.01em; }
main { padding-top: 2.5rem; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 0.75rem; padding: 1.5rem; }
.card > * + * { margin-top: 1rem; }
h1 { margin: 0; font-size: 1.5rem; line-height: 2rem; font-weight: 600; letter-spacing: -0.02em; }
p { margin: 0; font-size: 0.875rem; }
.muted { color: var(--muted); }
.error { color: var(--accent); min-height: 1.25rem; }
form > * + * { margin-top: 0.75rem; }
label { display: block; font-size: 0.875rem; font-weight: 500; }
input {
  display: block; width: 100%; height: 2.5rem; padding: 0 0.75rem; border-radius: 0.5rem;
  border: 1px solid var(--input); background: transparent; color: inherit; font-size: 0.875rem;
}
input[aria-invalid="true"] { border-color: var(--accent); }
button {
  display: inline-flex; align-items: center; justify-content: center; width: 100%; height: 2.5rem;
  padding: 0 1rem; border: 0; border-radius: 9999px; background: var(--accent); color: var(--on-accent);
  font: inherit; font-size: 0.875rem; font-weight: 500; cursor: pointer;
}
button:hover { filter: brightness(0.9); }
button:disabled { opacity: 0.4; cursor: not-allowed; }
a { color: var(--accent); font-weight: 500; text-decoration: underline; text-underline-offset: 2px; }
a:focus-visible, button:focus-visible, input:focus-visible, h1:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }