:root {
  --bg: #f9fafb;
  --card: #ffffff;
  --border: #e5e7eb;
  --text: #374151;
  --heading: #111827;
  --muted: #6b7280;
  --accent: #2563eb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111827;
    --card: #1f2937;
    --border: #374151;
    --text: #d1d5db;
    --heading: #ffffff;
    --muted: #9ca3af;
    --accent: #60a5fa;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  line-height: 1.6;
}
.container {
  max-width: 56rem;
  margin: 0 auto;
  padding: 3rem 1.25rem;
}
.windows {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin: 0 0 2rem;
}
.windows a {
  text-decoration: none;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  font-size: 0.95rem;
}
.windows a[aria-current="page"] {
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}
header {
  text-align: center;
  margin-bottom: 3rem;
}
header h1 {
  color: var(--heading);
  font-size: 1.875rem;
  margin: 0 0 0.5rem;
}
header .sub {
  color: var(--muted);
  margin: 0;
}
header .updated {
  color: var(--muted);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}
section,
.intro {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
section h2 {
  color: var(--heading);
  font-size: 1.25rem;
  margin: 0 0 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
section h3 {
  color: var(--heading);
  font-size: 1.05rem;
  margin: 1.25rem 0 0.75rem;
}
p {
  margin: 0 0 1rem;
}
p:last-child,
ul:last-child {
  margin-bottom: 0;
}
ul {
  padding-left: 1.5rem;
  margin: 0 0 1rem;
}
li {
  margin-bottom: 0.5rem;
}
a {
  color: var(--accent);
  word-break: break-word;
}
.note {
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.35);
  border-radius: 0.375rem;
  padding: 1rem;
  margin-top: 1rem;
  font-size: 0.95rem;
}
.note p {
  margin: 0;
}
.contact-list {
  list-style: none;
  padding: 0;
}
.contact-list li {
  margin-bottom: 0.75rem;
}
strong {
  color: var(--heading);
}
code {
  font-size: 0.92em;
}