/**
 * Header Layout Component
 * Features: breadcrumbs, actions, theme toggle
 * NOTE: The .topbar base layout (position, size, colours) is defined in
 * layouts/sidebar.css — this file only extends it with sub-element styles.
 *
 * @author Amit Haridas, ConcreteInfo
 */

.topbar--scrolled {
  box-shadow: var(--shadow-sm);
}

/* ============================================
   TOPBAR START
   ============================================ */
.topbar__start {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.topbar__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.topbar__toggle:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.topbar__brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.topbar__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

/* Breadcrumbs */
.topbar__breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--text-tertiary);
}

.breadcrumb__item {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb__item:hover {
  color: var(--color-primary);
}

.breadcrumb__item--current {
  color: var(--text-tertiary);
  font-weight: var(--font-weight-medium);
}

.breadcrumb__separator {
  color: var(--text-tertiary);
}

/* ============================================
   TOPBAR END
   ============================================ */
.topbar__end {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

/* Theme Toggle */
.theme-toggle {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-lg);
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.theme-toggle__icon {
  font-size: var(--font-size-lg);
  transition: transform var(--transition-normal);
}

.theme-toggle:hover .theme-toggle__icon {
  transform: rotate(15deg);
}

.theme-toggle .icon-sun {
  display: none;
  color: var(--color-warning);
}

.theme-toggle .icon-moon {
  display: block;
  color: var(--color-gray-500);
}

/* Topbar Actions */
.topbar__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.topbar__action {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.topbar__action:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.topbar__action-badge {
  position: absolute;
  top: 0.25rem;
  right: 0.25rem;
  width: 0.5rem;
  height: 0.5rem;
  background-color: var(--color-danger);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-elevated);
}

/* ============================================
   RESPONSIVE TOPBAR
   ============================================ */
@media (max-width: 1023.98px) {
  .topbar__toggle {
    display: flex;
  }

  .topbar__breadcrumbs {
    display: none;
  }
}

@media (max-width: 639.98px) {
  .topbar__title {
    font-size: var(--font-size-base);
  }
}

/* ============================================
   PUBLIC NAVBAR (for non-authenticated pages)
   ============================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--bg-elevated);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
  /* Brand accent underline */
  border-top: 3px solid var(--color-brand);
}

.navbar__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-6);
  height: 4.5rem;
}

.navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  text-decoration: none;
}

.navbar__logo {
  height: 2.5rem;
  width: auto;
}

.navbar__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.navbar__link {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.navbar__link:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.navbar__link--active {
  color: var(--color-primary);
  background-color: var(--color-brand-100);
}

@media (max-width: 767.98px) {
  .navbar__container {
    padding: 0 var(--spacing-4);
  }

  .navbar__title {
    display: none;
  }
}