:root {
  --primary: #6366F1;
  --bg: #FAFAF8;
  --surface: #FFFFFF;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --text-light: #9CA3AF;
  --border: #E5E7EB;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --surface: #1C1C1C;
    --text: #F3F4F6;
    --text-secondary: #9CA3AF;
    --text-light: #6B7280;
    --border: #2D2D2D;
  }
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

header.top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}

header.top .logo {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
}

header.top h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

header.top nav {
  margin-left: auto;
  display: flex;
  gap: 16px;
}

header.top nav a {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
}

header.top nav a:hover {
  color: var(--primary);
}

h1.page-title {
  font-size: 32px;
  font-weight: 700;
  margin: 0 0 4px;
  letter-spacing: -0.5px;
}

.last-updated {
  color: var(--text-light);
  font-size: 13px;
  margin: 0 0 32px;
}

.intro {
  color: var(--text-secondary);
  font-size: 16px;
  margin: 0 0 40px;
  padding: 16px 20px;
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
}

section {
  margin-bottom: 32px;
}

section h2 {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--text);
}

section h3 {
  font-size: 15px;
  font-weight: 600;
  margin: 16px 0 6px;
  color: var(--text);
}

section p {
  margin: 0 0 12px;
  color: var(--text-secondary);
}

section ul {
  margin: 0 0 12px;
  padding-left: 24px;
  color: var(--text-secondary);
}

section ul li {
  margin-bottom: 6px;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--text-light);
  font-size: 13px;
  text-align: center;
}

/* Landing page hero */
.hero {
  text-align: center;
  padding: 64px 0 48px;
}

.hero .logo-large {
  width: 80px;
  height: 80px;
  background: var(--primary);
  border-radius: 18px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 36px;
}

.hero h1 {
  font-size: 48px;
  margin: 0 0 12px;
  font-weight: 700;
  letter-spacing: -1px;
}

.hero p.tagline {
  font-size: 18px;
  color: var(--text-secondary);
  margin: 0 0 32px;
}

.hero .links {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero .links a {
  display: inline-block;
  padding: 12px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-weight: 500;
  transition: border-color 0.15s, transform 0.15s;
}

.hero .links a:hover {
  border-color: var(--primary);
  text-decoration: none;
  transform: translateY(-1px);
}