:root {
  --site-header-background: color-mix(in srgb, var(--bgColor-default, #ffffff) 92%, transparent);
  --site-border: var(--borderColor-default, #d1d9e0);
  --site-muted: var(--fgColor-muted, #59636e);
  --site-link: var(--fgColor-accent, #0969da);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bgColor-default, #ffffff);
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--fgColor-default, #1f2328);
  background: var(--bgColor-default, #ffffff);
}

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid var(--site-border);
  background: var(--site-header-background);
  backdrop-filter: blur(18px) saturate(1.5);
}

.site-header-inner {
  display: flex;
  min-height: 64px;
  max-width: 980px;
  margin: 0 auto;
  padding: 0 45px;
  align-items: center;
  gap: 24px;
}

.brand,
.document-nav a,
.language-menu summary,
.language-options a,
.locale-links a {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.brand {
  color: inherit;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
}

.document-nav {
  display: flex;
  margin-left: auto;
  gap: 18px;
}

.document-nav a,
.language-menu summary {
  color: var(--site-muted);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.document-nav a:hover,
.document-nav a[aria-current="page"],
.language-menu summary:hover {
  color: inherit;
}

.document-nav a[aria-current="page"] {
  font-weight: 650;
}

.language-menu {
  position: relative;
}

.language-menu summary {
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.language-menu summary::-webkit-details-marker {
  display: none;
}

.language-menu summary::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin: 0 2px 3px 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
}

.language-menu[open] summary::after {
  margin-bottom: 0;
  transform: rotate(225deg);
}

.language-options {
  position: absolute;
  top: calc(100% + 14px);
  right: 0;
  display: grid;
  min-width: 168px;
  overflow: hidden;
  padding: 6px;
  border: 1px solid var(--site-border);
  border-radius: 8px;
  background: var(--bgColor-default, #ffffff);
  box-shadow: 0 8px 24px rgba(140, 149, 159, 0.2);
}

.language-options a {
  padding: 7px 10px;
  border-radius: 5px;
  color: inherit;
  font-size: 14px;
  text-decoration: none;
}

.language-options a:hover,
.language-options a[aria-current="true"] {
  background: var(--bgColor-muted, #f6f8fa);
}

.language-options a[aria-current="true"] {
  font-weight: 650;
}

.markdown-body {
  min-width: 200px;
  max-width: 980px;
  margin: 0 auto;
  padding: 48px 45px 80px;
}

.markdown-body > h1:first-child {
  margin-top: 0;
}

.home {
  max-width: 980px;
  margin: 0 auto;
  padding: 64px 45px 80px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.home-intro h1 {
  margin: 0;
  font-size: clamp(32px, 7vw, 54px);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.home-intro p {
  margin: 14px 0 0;
  color: var(--site-muted);
  font-size: 18px;
}

.locale-grid {
  display: grid;
  margin-top: 52px;
  border-top: 1px solid var(--site-border);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.locale-card {
  padding: 24px 0;
  border-bottom: 1px solid var(--site-border);
}

.locale-card:nth-child(odd) {
  padding-right: 32px;
}

.locale-card:nth-child(even) {
  padding-left: 32px;
  border-left: 1px solid var(--site-border);
}

.locale-card h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 650;
}

.locale-links {
  display: flex;
  margin-top: 10px;
  gap: 16px;
}

.locale-links a {
  color: var(--site-link);
  font-size: 14px;
  text-decoration: none;
}

.locale-links a:hover {
  text-decoration: underline;
}

@media (max-width: 767px) {
  .site-header-inner {
    min-height: 56px;
    padding: 0 16px;
    gap: 14px;
  }

  .document-nav {
    gap: 12px;
  }

  .document-nav a {
    font-size: 13px;
  }

  .language-menu summary {
    width: 24px;
    overflow: hidden;
    color: transparent;
    white-space: nowrap;
  }

  .language-menu summary::before {
    content: "文";
    color: var(--site-muted);
    font-size: 14px;
  }

  .language-menu summary::after {
    display: none;
  }

  .markdown-body {
    padding: 28px 16px 56px;
  }

  .home {
    padding: 40px 16px 56px;
  }

  .locale-grid {
    margin-top: 36px;
    grid-template-columns: 1fr;
  }

  .locale-card:nth-child(odd),
  .locale-card:nth-child(even) {
    padding: 20px 0;
    border-left: 0;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --site-header-background: color-mix(in srgb, var(--bgColor-default, #0d1117) 90%, transparent);
  }

  .language-options {
    box-shadow: 0 8px 24px rgba(1, 4, 9, 0.5);
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header {
    backdrop-filter: none;
  }
}