/* Shared site header — sticky 52px nav */

:root {
  --site-header-height: 52px;
  --site-header-indigo: #6366f1;
  --site-header-indigo-hover: #4f46e5;
  --site-header-border: rgba(45, 42, 38, 0.12);
  --site-header-text: #2d2a26;
  --site-header-muted: #6b6560;
}

body.site-header-active {
  padding-top: var(--site-header-height);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--site-header-height);
  background: #fff;
  border-bottom: 0.5px solid var(--site-header-border);
  box-shadow: 0 1px 0 rgba(45, 42, 38, 0.04);
}

.site-header-inner {
  max-width: 1200px;
  height: 100%;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.site-header-brand {
  font-family: var(--font-display, 'Fraunces', Georgia, serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--site-header-text);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -0.02em;
}

.site-header-brand:hover {
  color: var(--site-header-indigo);
}

.site-header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.site-header-link {
  font-family: var(--font-ui, 'Inter', -apple-system, sans-serif);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--site-header-muted);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 8px;
  border: none;
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s ease, background 0.15s ease;
}

a.site-header-link:hover,
button.site-header-link:hover {
  color: var(--site-header-text);
  background: rgba(99, 102, 241, 0.06);
}

.site-header-link.is-active {
  color: var(--site-header-text);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--site-header-indigo);
  border-radius: 0;
  background: transparent;
}

.site-header-dropdown {
  position: relative;
}

.site-header-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.site-header-caret {
  font-size: 0.7rem;
  opacity: 0.7;
}

.site-header-dropdown-panel {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 200px;
  padding: 6px;
  background: #fff;
  border: 1px solid var(--site-header-border);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(45, 42, 38, 0.12);
  z-index: 1001;
}

.site-header-dropdown.is-open .site-header-dropdown-panel,
.site-header-dropdown:hover .site-header-dropdown-panel {
  display: block;
}

.site-header-dropdown-panel a {
  display: block;
  padding: 10px 12px;
  font-family: var(--font-ui, 'Inter', -apple-system, sans-serif);
  font-size: 0.88rem;
  color: var(--site-header-text);
  text-decoration: none;
  border-radius: 8px;
}

.site-header-dropdown-panel a:hover {
  background: #eef2ff;
  color: var(--site-header-indigo-hover);
}

.site-header-subscribe {
  font-family: var(--font-ui, 'Inter', -apple-system, sans-serif);
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: var(--site-header-indigo);
  padding: 8px 16px;
  border-radius: 999px;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.15s ease;
}

.site-header-subscribe:hover {
  background: var(--site-header-indigo-hover);
  color: #fff;
}

.site-header-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--site-header-border);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.site-header-menu-bars {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 18px;
}

.site-header-menu-bars span {
  display: block;
  height: 2px;
  background: var(--site-header-text);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header-lang-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Mobile */
@media (max-width: 900px) {
  .site-header-menu-btn {
    display: inline-flex;
  }

  .site-header-nav {
    display: none;
    position: absolute;
    top: var(--site-header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 16px 16px;
    background: #fff;
    border-bottom: 0.5px solid var(--site-header-border);
    box-shadow: 0 8px 20px rgba(45, 42, 38, 0.08);
  }

  .site-header.is-nav-open .site-header-nav {
    display: flex;
  }

  .site-header-link {
    width: 100%;
    text-align: left;
    padding: 12px 10px;
  }

  .site-header-link.is-active {
    box-shadow: inset 3px 0 0 var(--site-header-indigo);
  }

  .site-header-dropdown {
    width: 100%;
  }

  .site-header-dropdown-panel {
    position: static;
    transform: none;
    display: none;
    box-shadow: none;
    border: none;
    padding: 0 0 0 8px;
    margin-top: 4px;
  }

  .site-header-dropdown.is-open .site-header-dropdown-panel {
    display: block;
  }

  .site-header-dropdown:hover .site-header-dropdown-panel {
    display: none;
  }

  .site-header-dropdown.is-open:hover .site-header-dropdown-panel {
    display: block;
  }

  .site-header-subscribe {
    font-size: 0.8rem;
    padding: 8px 12px;
  }
}

@media (prefers-color-scheme: dark) {
  .site-header {
    background: #1a1917;
    border-bottom-color: rgba(255, 255, 255, 0.1);
  }

  .site-header-brand,
  .site-header-link.is-active {
    color: #f5f2ed;
  }

  .site-header-link {
    color: #a8a29e;
  }

  .site-header-dropdown-panel {
    background: #292524;
    border-color: rgba(255, 255, 255, 0.1);
  }

  .site-header-dropdown-panel a {
    color: #f5f2ed;
  }

  .site-header-menu-btn {
    background: #292524;
    border-color: rgba(255, 255, 255, 0.1);
  }

  .site-header-menu-bars span {
    background: #f5f2ed;
  }

  @media (max-width: 900px) {
    .site-header-nav {
      background: #1a1917;
    }
  }
}