/* Theme Styles */

.site-header {
  background: var(--color-surface);
}

.theme-dark .site-header {
  background: rgba(0, 0, 0, 0.3);
}

.theme-dark .lab_name,
.theme-dark .nav_item {
  color: white;
}

.theme-dark .footer {
  background: rgba(0, 0, 0, 0.3);
  color: white;
}

.theme-dark .header_nav_mobile {
  background: rgba(0, 0, 0, 0.95);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.theme-dark .header_nav_mobile .nav_item {
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

.nav_item {
  position: relative;
  padding-bottom: 4px;
  transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.nav_item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-brand), var(--color-brand-light));
  transform: translateX(-50%);
  transition: width 0.4s cubic-bezier(0.4, 0.0, 0.2, 1);
  opacity: 0;
}

.nav_item:hover {
  color: var(--color-brand) !important;
  transform: translateY(-2px);
}

.nav_item:hover::after {
  width: 100%;
  opacity: 1;
}

.nav_item.active {
  color: var(--color-brand) !important;
}

.nav_item.active::after {
  width: 100%;
  opacity: 1;
}

.nav_item,
.nav_item i {
  transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.nav_item:hover i {
  color: var(--color-brand);
  transform: scale(1.1);
}