:root {
  color-scheme: light dark;
  --bg: #fafafa;
  --fg: #171717;
  --muted: #5f6368;
  --line: rgba(0, 0, 0, .12);
  --panel: #ffffff;
  --link: #175cd3;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.62;
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 18px 72px;
}

header {
  margin-bottom: 28px;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin: 32px 0 10px;
  font-size: 1.35rem;
  letter-spacing: 0;
}

h3 {
  margin: 24px 0 8px;
  font-size: 1.05rem;
  letter-spacing: 0;
}

p,
ul,
ol {
  margin: 0 0 14px;
}

ul,
ol {
  padding-left: 22px;
}

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

.meta {
  color: var(--muted);
  font-size: .95rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
}

.nav a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: inherit;
  text-decoration: none;
  background: var(--panel);
}

.region-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 8px;
}

.region-option {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 38px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: inherit;
  background: var(--panel);
  font: inherit;
  cursor: pointer;
}

.region-option[aria-current="true"] {
  border-color: var(--link);
  color: var(--link);
  font-weight: 600;
}

.card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

.region {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.region[hidden] {
  display: none !important;
}

.region:first-of-type {
  border-top: 0;
  padding-top: 0;
}

footer {
  margin-top: 40px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .92rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101112;
    --fg: #f4f4f5;
    --muted: #a5a7ab;
    --line: rgba(255, 255, 255, .16);
    --panel: #181a1c;
    --link: #8ab4f8;
  }
}