:root {
  --brand: #1B3A5C;
  --brand-deep: #0D1F33;
  --accent: #C89B3C;
  --bg: #ffffff;
  --surface: #f4f6f8;
  --text: #16202b;
  --muted: #5b6673;
  --border: #dde3e9;
  --radius: 14px;
  --max: 780px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand: #6C97C4;
    --brand-deep: #0D1F33;
    --accent: #E4BC5C;
    --bg: #0d1117;
    --surface: #161c24;
    --text: #eaeef2;
    --muted: #9aa6b2;
    --border: #29323d;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.62;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

header.site {
  background: linear-gradient(160deg, var(--brand-deep), var(--brand));
  color: #fff;
  padding: 40px 20px 34px;
}

header.site .inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

header.site img.logo {
  width: 64px;
  height: 64px;
  border-radius: 15px;
  flex: none;
}

header.site h1 {
  margin: 0;
  font-size: 26px;
  letter-spacing: -0.4px;
  color: #fff;
}

header.site p.tag {
  margin: 4px 0 0;
  opacity: 0.9;
  font-size: 15px;
  color: #fff;
}

nav.site {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

nav.site ul {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
  list-style: none;
  display: flex;
  gap: 20px;
  overflow-x: auto;
}

nav.site a {
  display: block;
  padding: 12px 0;
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
}

nav.site a:hover, nav.site a[aria-current="page"] {
  color: var(--brand);
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 34px 20px 70px;
}

h2 {
  font-size: 22px;
  letter-spacing: -0.3px;
  margin: 34px 0 10px;
  color: var(--text);
}

h3 {
  font-size: 18px;
  margin: 24px 0 8px;
  color: var(--text);
}

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

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

.meta {
  color: var(--muted);
  font-size: 14px;
  margin-top: 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 18px 0;
}

.card.highlight {
  border-left: 4px solid var(--accent);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 15px;
}

.table-wrap { overflow-x: auto; }

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  font-weight: 700;
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

ul.plain { padding-left: 20px; }

.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff !important;
  text-decoration: none;
  font-weight: 700;
  padding: 12px 22px;
  border-radius: 12px;
  margin-top: 10px;
}

footer.site {
  border-top: 1px solid var(--border);
  padding: 26px 20px 50px;
  color: var(--muted);
  font-size: 14px;
}

footer.site .inner {
  max-width: var(--max);
  margin: 0 auto;
}

.disclaimer {
  background: rgba(200, 155, 60, 0.12);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 15px;
  margin: 20px 0;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 22px 0;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.feature h3 { margin: 0 0 4px; font-size: 16px; }
.feature p { margin: 0; font-size: 14px; color: var(--muted); }

img { max-width: 100%; height: auto; }