:root {
  --bg: #fbfaf7;
  --fg: #1c1b18;
  --muted: #5c5a52;
  --line: #ddd9cf;
  --btn-bg: #1c1b18;
  --btn-fg: #fbfaf7;
  --box-bg: #f1eee5;
  --wrong: #b3261e;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16150f;
    --fg: #f0ede4;
    --muted: #a9a49a;
    --line: #35332b;
    --btn-bg: #f0ede4;
    --btn-fg: #16150f;
    --box-bg: #23211a;
    --wrong: #ff8a80;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}
main {
  max-width: 24rem;
  margin: 0 auto;
  padding: 48px 20px 64px;
}
.top { text-align: center; }
.crest { width: 112px; max-width: 60%; height: auto; display: block; margin: 8px auto 12px; }
h1 { font-size: 1.7rem; line-height: 1.2; margin: 0 0 28px; }
form { display: flex; flex-direction: column; gap: 12px; }
label { font-size: 0.95rem; color: var(--muted); }
input {
  font: inherit;
  padding: 14px 16px;
  min-height: 52px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--box-bg);
  color: var(--fg);
  width: 100%;
}
.btn {
  font: inherit;
  font-weight: 600;
  min-height: 52px;
  padding: 14px 16px;
  border: 0;
  border-radius: 10px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  width: 100%;
}
.wrong { color: var(--wrong); text-align: center; margin: 4px 0 0; }