:root {
  color-scheme: dark;
  --bg: #0A0D0C;
  --card: #161B19;
  --border: #252C29;
  --text: #F2F4F3;
  --text-secondary: #9BA6A1;
  --text-tertiary: #666F6B;
  --accent: #6C63FF;
}

* { box-sizing: border-box; }

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

.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

header.site {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
}

header.site .mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--accent);
}

header.site .name {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

h1 {
  font-size: 28px;
  margin: 0 0 4px;
}

h2 {
  font-size: 18px;
  color: var(--text);
  margin: 32px 0 8px;
}

p, li {
  color: var(--text-secondary);
  font-size: 15px;
}

.effective {
  color: var(--text-tertiary);
  font-size: 13px;
  margin-bottom: 32px;
}

a {
  color: var(--accent);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 16px;
}

.nav-links {
  display: flex;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
}

.tagline {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 32px;
}

.index-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.index-links a {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
}