:root {
  color-scheme: dark;
  --bg: #07090d;
  --panel: #111721;
  --panel-2: #182130;
  --line: #435169;
  --text: #fffaf0;
  --muted: #aeb8c8;
  --accent: #ffd77a;
  --danger: #ff8f8f;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Serif SC", "Songti SC", "Microsoft YaHei", serif;
}

button, input {
  font: inherit;
}

.shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(420px, 100%);
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  box-shadow: 0 24px 70px rgba(0, 0, 0, .55);
}

.brand {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 34px;
  letter-spacing: .18em;
}

.subtitle {
  margin: 0 0 22px;
  color: var(--muted);
  line-height: 1.8;
}

.field {
  display: grid;
  gap: 7px;
  margin-bottom: 14px;
}

.field label {
  color: var(--muted);
  font-size: 14px;
}

.field input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #0c1119;
  color: var(--text);
  outline: none;
}

.field input:focus {
  border-color: var(--accent);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.btn {
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel-2);
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
}

.btn.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #171109;
}

.btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}

.status {
  min-height: 24px;
  margin-top: 16px;
  color: var(--muted);
  line-height: 1.7;
}

.status.error { color: var(--danger); }

.hidden { display: none !important; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: min(1080px, 100%);
  margin: 0 auto;
  padding: 18px 24px;
  border-bottom: 1px solid var(--line);
}

.site-header a {
  color: var(--text);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
}

.page {
  width: min(900px, 100%);
  margin: 0 auto;
  padding: 42px 24px 80px;
}

.page h1 {
  margin-top: 0;
  color: var(--accent);
  font-size: 30px;
}

@media (max-width: 640px) {
  .shell { padding: 14px; }
  .login-card { padding: 22px 18px; }
  .site-header { padding: 14px; }
}