:root {
  --fg: #0a2540;
  --muted: #3b4a5a;
  --bg: #ffffff;
  --accent: #338cf4;
  --border: #e2e8f0;
  --table-bg: #f7faff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #eaf6ff;
    --muted: #b6c9e6;
    --bg: #101624;
    --accent: #60aaff;
    --border: #22304a;
    --table-bg: #1a2336;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

h1 {
  font-size: 2rem;
  margin: 0 0 1rem;
  line-height: 1.2;
}

h2 {
  font-size: 1.25rem;
  margin: 2.5rem 0 0.5rem;
  border-top: 1px solid var(--border);
  padding-top: 1.75rem;
}

h3 {
  font-size: 1.05rem;
  margin: 1.5rem 0 0.5rem;
  color: var(--muted);
}

p, li {
  color: var(--fg);
}

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

a:hover {
  text-decoration: underline;
}

ul {
  padding-left: 1.25rem;
}

li {
  margin: 0.35rem 0;
}

strong {
  color: var(--fg);
}

.effective {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: -0.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}

th, td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  vertical-align: top;
}

th {
  background: var(--table-bg);
  font-weight: 600;
}

.footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.home {
  max-width: 560px;
  margin: 0 auto;
  padding: 96px 24px;
  text-align: center;
}

.home h1 {
  font-size: 2.5rem;
}

.home p {
  color: var(--muted);
  font-size: 1.1rem;
}

.home .links {
  margin-top: 2rem;
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}