/**
 * Modul: Settings Navigation
 * Zweck: Zweistufige Sidebar-Navigation für Settings
 * Abhängigkeiten: tokens.css, layout.css
 */

/* --------------------------------------------------------
   Layout Grid
   -------------------------------------------------------- */

.settings-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
  min-height: calc(100vh - var(--nav-bottom-height, 0px));
  background: var(--color-bg);
}

@media (max-width: 768px) {
  .settings-layout {
    grid-template-columns: 1fr;
  }

  .settings-sidebar {
    display: none;
  }

  /* Mobile: Zeige horizontale Tabs statt Sidebar */
  .settings-layout--mobile-tabs {
    display: block;
  }
}

/* --------------------------------------------------------
   Sidebar
   -------------------------------------------------------- */

.settings-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.settings-sidebar::-webkit-scrollbar {
  width: 6px;
}

.settings-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.settings-sidebar::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.settings-sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}

/* --------------------------------------------------------
   Sidebar Section
   -------------------------------------------------------- */

.settings-sidebar-section {
  margin-bottom: var(--space-6);
}

.settings-sidebar-section:last-child {
  margin-bottom: 0;
}

.settings-sidebar-section__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0 var(--space-4);
  margin-bottom: var(--space-2);
  color: var(--color-text-tertiary);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  user-select: none;
}

.settings-sidebar-section__icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  opacity: 0.7;
}

.settings-sidebar-section__label {
  line-height: 1;
}

/* Active Section */
.settings-sidebar-section--active .settings-sidebar-section__header {
  color: var(--color-accent);
}

.settings-sidebar-section--active .settings-sidebar-section__icon {
  opacity: 1;
}

/* --------------------------------------------------------
   Sidebar Pages
   -------------------------------------------------------- */

.settings-sidebar-pages {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.settings-sidebar-page {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  margin: 0 var(--space-2);
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  text-align: left;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  min-height: var(--target-base);
}

.settings-sidebar-page:hover {
  background: var(--color-surface-2);
  color: var(--color-text-primary);
}

.settings-sidebar-page--active {
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  color: var(--color-accent);
  font-weight: var(--font-weight-semibold);
}

.settings-sidebar-page--active:hover {
  background: color-mix(in srgb, var(--color-accent) 18%, transparent);
}

.settings-sidebar-page__icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.settings-sidebar-page__label {
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --------------------------------------------------------
   Content Area
   -------------------------------------------------------- */

.settings-content {
  padding: var(--space-6) var(--space-6) var(--space-8);
  max-width: 900px;
  min-width: 0;
}

@media (max-width: 768px) {
  .settings-content {
    padding: var(--space-4);
  }
}

/* --------------------------------------------------------
   Breadcrumb
   -------------------------------------------------------- */

.settings-breadcrumb {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.settings-breadcrumb__list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.settings-breadcrumb__item {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1;
}

.settings-breadcrumb__item--current {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
}

.settings-breadcrumb__separator {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  line-height: 1;
  user-select: none;
}

/* --------------------------------------------------------
   Page Header (in Content Area)
   -------------------------------------------------------- */

.settings-page-header {
  margin-bottom: var(--space-6);
}

.settings-page-header__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-2);
  letter-spacing: -0.02em;
}

.settings-page-header__description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* --------------------------------------------------------
   Mobile Tabs (Fallback für kleine Screens)
   -------------------------------------------------------- */

@media (max-width: 768px) {
  .settings-mobile-tabs {
    display: flex;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: var(--color-bg);
  }

  .settings-mobile-tabs::-webkit-scrollbar {
    display: none;
  }

  .settings-mobile-tab {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: 0 var(--space-3);
    height: var(--target-base);
    border-radius: var(--radius-full);
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    font-family: inherit;
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
  }

  .settings-mobile-tab--active {
    background-color: color-mix(in srgb, var(--color-accent) 14%, transparent);
    color: var(--color-accent);
  }

  .settings-mobile-tab__icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
  }
}

/* --------------------------------------------------------
   Help Tooltip
   -------------------------------------------------------- */

.settings-help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  margin-left: var(--space-1);
  color: var(--color-text-tertiary);
  cursor: help;
  position: relative;
  vertical-align: middle;
}

.settings-help-icon:hover {
  color: var(--color-accent);
}

.settings-help-icon svg,
.settings-help-icon i {
  width: 14px;
  height: 14px;
}

/* Tooltip */
.settings-help-tooltip {
  position: absolute;
  bottom: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-2) var(--space-3);
  max-width: 240px;
  background: var(--color-text-primary);
  color: var(--color-bg);
  font-size: var(--text-xs);
  line-height: 1.4;
  border-radius: var(--radius-sm);
  white-space: normal;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: var(--z-tooltip);
  box-shadow: var(--shadow-lg);
}

.settings-help-icon:hover .settings-help-tooltip {
  opacity: 1;
}

/* Tooltip Arrow */
.settings-help-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: var(--color-text-primary);
}

/* --------------------------------------------------------
   Status Badge (für Sync-Status)
   -------------------------------------------------------- */

.settings-status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  line-height: 1;
}

.settings-status-badge--success {
  background: var(--color-success-light);
  color: var(--color-success);
}

.settings-status-badge--error {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.settings-status-badge--syncing {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.settings-status-badge__icon {
  width: 12px;
  height: 12px;
}

/* Spinning animation für Sync-Icon */
.settings-status-badge--syncing .settings-status-badge__icon {
  animation: spin 1.5s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* --------------------------------------------------------
   Empty State (für Onboarding)
   -------------------------------------------------------- */

.settings-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-6);
  text-align: center;
  border-radius: var(--radius-lg);
  background: var(--color-surface-2);
  border: 2px dashed var(--color-border);
}

.settings-empty-state__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
  color: var(--color-text-tertiary);
  opacity: 0.5;
}

.settings-empty-state__title {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-2);
}

.settings-empty-state__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin: 0 0 var(--space-4);
  max-width: 400px;
}

.settings-empty-state__action {
  /* Button wird schon durch .btn gestyled */
}