:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #1a1d21;
  --muted: #5f6368;
  --border: #e0e3e8;
  --primary: #019d45;
  --primary-tint: #e5f4ec;
  --max-width: 720px;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121316;
    --surface: #1c1e22;
    --text: #f0f2f5;
    --muted: #989aa2;
    --border: #2a2d32;
    --primary: #2bbd6a;
    --primary-tint: #1e2a23;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

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

a:hover {
  text-decoration: underline;
}

header.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

header.site-header .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

nav.primary-nav {
  display: flex;
  gap: 16px;
  font-size: 14px;
}

nav.primary-nav a {
  color: var(--text);
  opacity: 0.7;
}

nav.primary-nav a:hover {
  opacity: 1;
  text-decoration: none;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 20px 64px;
}

h1 {
  font-size: 28px;
  margin: 0 0 8px;
}

h2 {
  font-size: 20px;
  margin: 32px 0 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

h2:first-of-type {
  border-top: 0;
  padding-top: 0;
  margin-top: 24px;
}

.lang-label {
  display: inline-block;
  padding: 2px 8px;
  background: var(--primary-tint);
  color: var(--primary);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.muted {
  color: var(--muted);
  font-size: 14px;
}

.support-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin: 24px 0;
}

.support-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.support-card a.cta {
  display: inline-block;
  background: var(--primary);
  color: white !important;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 600;
  margin-top: 12px;
}

.support-card a.cta:hover {
  text-decoration: none;
  filter: brightness(0.95);
}

details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin: 8px 0;
}

details[open] {
  background: var(--surface);
}

details summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  outline: none;
  padding: 4px 0;
}

details summary::-webkit-details-marker {
  display: none;
}

details summary::after {
  content: " +";
  float: right;
  color: var(--muted);
  font-weight: 400;
}

details[open] summary::after {
  content: " −";
}

details p {
  margin: 8px 0 4px;
  color: var(--muted);
}

footer.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  margin-top: 48px;
}

footer.site-footer .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 20px;
  font-size: 13px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
}

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

ul.plain li {
  margin: 4px 0;
}