/* ==============================
   Site Header - Glassmorphism nav bar
   ============================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: saturate(180%) blur(var(--glass-blur));
  -webkit-backdrop-filter: saturate(180%) blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  padding-block: var(--space-sm);
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  height: 48px;
}

/* ---- Logo ---- */
.site-header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  text-decoration: none;
  color: var(--text-primary);
  flex-shrink: 0;
}

.site-header__logo:hover {
  color: var(--text-primary);
}

.site-header__logo-icon {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
}

.site-header__wordmark {
  font-size: var(--font-size-base);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.site-header__tld {
  color: var(--color-primary);
}

/* ---- Nav links ---- */
.site-header__links {
  display: flex;
  list-style: none;
  gap: var(--space-2xs);
  margin: 0;
  padding: 0;
  flex: 1;
}

.site-header__link {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 400;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.site-header__link:hover {
  color: var(--text-primary);
  background: var(--surface-4);
}

.site-header__link--active {
  color: var(--text-primary);
  background: var(--surface-4);
  font-weight: 500;
}

/* ---- Actions ---- */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-shrink: 0;
}

.site-header__theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.site-header__theme-btn:hover {
  background: var(--surface-4);
  color: var(--text-primary);
  transform: none;
  box-shadow: none;
}

.site-header__theme-icon {
  width: 18px;
  height: 18px;
}

/* Show/hide sun/moon based on theme */
[data-theme="dark"] .site-header__theme-icon--dark { display: none; }
[data-theme="dark"] .site-header__theme-icon--light { display: block; }
[data-theme="light"] .site-header__theme-icon--light { display: none; }
[data-theme="light"] .site-header__theme-icon--dark { display: block; }

/* ---- Mobile menu button ---- */
.site-header__mobile-menu {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
}

.site-header__mobile-menu:hover {
  background: var(--surface-4);
  color: var(--text-primary);
  transform: none;
  box-shadow: none;
}

/* ---- Mobile ---- */
@media (max-width: 768px) {
  .site-header__links {
    display: none;
  }

  .site-header__mobile-menu {
    display: flex;
  }

  .site-header__links--open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(var(--glass-blur));
    -webkit-backdrop-filter: saturate(180%) blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border);
    padding: var(--space-md) var(--space-lg);
    gap: var(--space-2xs);
  }
}