:root {
  --base-font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --code-font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --theme-color: #4ea1ff;
  --base-background-color: #f8fafc;
  --sidebar-background: #0f172a;
  --sidebar-name-color: #f8fafc;
  --sidebar-nav-link-color: #cbd5e1;
  --sidebar-nav-link-color--active: #4ea1ff;
  --sidebar-nav-link-font-weight--active: 700;
  --heading-color: #0f172a;
  --text-color-base: #1e293b;
  --link-color: #1d4ed8;
  --content-max-width: 980px;
  --cover-background-image: radial-gradient(circle at 0% 0%, #dbeafe 0%, transparent 45%),
    radial-gradient(circle at 100% 20%, #bae6fd 0%, transparent 40%),
    linear-gradient(160deg, #f8fafc, #e2e8f0 70%);
}

.app-name-link img {
  display: none;
}

.sidebar {
  border-right: 1px solid #1e293b;
}

.sidebar .search {
  margin: 0.8rem;
}

.sidebar .search input {
  border-radius: 10px;
  background: #111b34;
  color: #f1f5f9;
  border: 1px solid #334155;
}

.markdown-section h1,
.markdown-section h2,
.markdown-section h3 {
  letter-spacing: -0.01em;
}

.markdown-section h1 {
  font-size: 2.2rem;
}

.markdown-section code {
  font-size: 0.88em;
  border-radius: 6px;
}

.markdown-section pre > code {
  border-radius: 12px;
}

.markdown-section blockquote {
  border-left: 4px solid #38bdf8;
  background: #e0f2fe;
  border-radius: 8px;
  color: #0c4a6e;
}

.markdown-section table {
  border-collapse: collapse;
}

.markdown-section table td,
.markdown-section table th {
  border: 1px solid #cbd5e1;
}

.lang-fab {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.lang-fab-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid #1e3a8a;
  border-radius: 999px;
  background: #1d4ed8;
  color: #eff6ff;
  padding: 10px 14px;
  cursor: pointer;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.25);
  font-family: var(--base-font-family);
  font-weight: 700;
}

.lang-fab-toggle:hover {
  background: #1e40af;
}

.lang-fab-icon {
  font-size: 14px;
  line-height: 1;
}

.lang-fab-label {
  font-size: 12px;
  letter-spacing: 0.06em;
}

.lang-fab-menu {
  min-width: 150px;
  background: #ffffff;
  border: 1px solid #bfdbfe;
  border-radius: 12px;
  padding: 6px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.18);
}

.lang-fab-menu[hidden] {
  display: none;
}

.lang-fab-menu button {
  width: 100%;
  text-align: left;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: #0f172a;
  padding: 10px 12px;
  font-family: var(--base-font-family);
  font-weight: 600;
  cursor: pointer;
}

.lang-fab-menu button:hover {
  background: #eff6ff;
}

@media (max-width: 900px) {
  :root {
    --content-max-width: 100%;
  }

  .markdown-section h1 {
    font-size: 1.7rem;
  }

  .lang-fab {
    right: 12px;
    bottom: 12px;
  }
}