/**
 * City Page Tabbed Navigation
 *
 * Organizes long city page content into tabbed sections for better UX
 * ALL content remains in HTML for SEO (no content hidden from crawlers)
 *
 * Tabs:
 * 1. Overview (Hero + Why Choose Us)
 * 2. Diensten (Services list)
 * 3. Werkproces (Process steps)
 * 4. Service Gebied (Coverage areas)
 * 5. FAQ (Frequently asked questions)
 *
 * @package MSM-Group
 * @version 1.0.0
 */

/* ============================================
   TAB NAVIGATION BAR
   ============================================ */

.city-content-tabs {
  position: sticky;
  top: 0;
  z-index: 900;
  background: var(--msm-color-bg-primary);
  border-bottom: 2px solid var(--msm-color-border-subtle);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  margin-bottom: var(--msm-space-8);
}

/* Container for tabs */
.city-tabs-container {
  max-width: var(--msm-breakpoint-xl);
  margin: 0 auto;
  padding: 0 var(--msm-space-4);
}

/* Tab list */
.city-tabs-nav {
  display: flex;
  gap: var(--msm-space-1);
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--msm-color-primary-300) var(--msm-color-bg-secondary);
  -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
}

/* Hide scrollbar for cleaner look but keep functionality */
.city-tabs-nav::-webkit-scrollbar {
  height: 4px;
}

.city-tabs-nav::-webkit-scrollbar-track {
  background: var(--msm-color-bg-secondary);
}

.city-tabs-nav::-webkit-scrollbar-thumb {
  background: var(--msm-color-primary-300);
  border-radius: 2px;
}

/* Individual tab button */
.city-tab-button {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--msm-space-2);
  padding: var(--msm-space-4) var(--msm-space-6);

  background: transparent;
  color: var(--msm-color-text-secondary);
  border: none;
  border-bottom: 3px solid transparent;

  font-family: var(--msm-font-primary);
  font-size: var(--msm-font-size-base);
  font-weight: var(--msm-font-weight-semibold);
  white-space: nowrap;
  cursor: pointer;

  transition:
    color var(--msm-duration-fast) var(--msm-ease-out),
    border-color var(--msm-duration-fast) var(--msm-ease-out),
    background var(--msm-duration-fast) var(--msm-ease-out);
}

.city-tab-button:hover {
  color: var(--msm-color-primary-600);
  background: var(--msm-color-primary-50);
}

/* Active tab */
.city-tab-button.active {
  color: var(--msm-color-primary-600);
  border-bottom-color: var(--msm-color-primary-600);
}

/* Tab icon */
.city-tab-icon {
  font-size: 18px;
}

/* Tab counter/badge */
.city-tab-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;

  background: var(--msm-color-bg-tertiary);
  color: var(--msm-color-text-secondary);
  border-radius: 10px;

  font-size: var(--msm-font-size-xs);
  font-weight: var(--msm-font-weight-bold);
  line-height: 1;
}

.city-tab-button.active .city-tab-badge {
  background: var(--msm-color-primary-500);
  color: var(--msm-color-text-inverse);
}

/* ============================================
   TAB CONTENT PANELS
   ============================================ */

.city-tab-content {
  /* All content visible by default for SEO */
  display: block;
}

/* Hide inactive tabs visually (but keep in DOM for SEO) */
.city-tab-content:not(.active) {
  /* Use visibility instead of display:none for better SEO */
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

/* Active tab content */
.city-tab-content.active {
  position: relative;
  left: auto;
  width: auto;
  height: auto;
  overflow: visible;
  clip: auto;

  /* Fade in animation */
  animation: tabFadeIn var(--msm-duration-normal) var(--msm-ease-out);
}

@keyframes tabFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Tab panel container */
.city-tab-panel {
  padding: var(--msm-space-6) 0;
}

/* ============================================
   TAB INDICATOR LINE (MOBILE)
   ============================================ */

.city-tabs-indicator {
  position: absolute;
  bottom: -2px;
  left: 0;
  height: 3px;
  background: var(--msm-color-primary-600);
  transition: transform var(--msm-duration-normal) var(--msm-ease-spring);
  pointer-events: none;
}

/* ============================================
   PRINT VIEW (All Tabs Visible)
   ============================================ */

@media print {
  .city-content-tabs {
    display: none; /* Hide tab navigation in print */
  }

  .city-tab-content {
    /* Show all content in print */
    position: relative !important;
    left: auto !important;
    width: auto !important;
    height: auto !important;
    overflow: visible !important;
    clip: auto !important;
  }

  .city-tab-content::before {
    /* Add tab title in print */
    content: attr(data-tab-title);
    display: block;
    font-size: 24px;
    font-weight: bold;
    margin-top: 24px;
    margin-bottom: 16px;
    page-break-before: always;
  }

  .city-tab-content:first-of-type::before {
    page-break-before: avoid;
  }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 991px) {
  .city-tab-button {
    padding: var(--msm-space-3) var(--msm-space-4);
    font-size: var(--msm-font-size-sm);
  }

  .city-tab-icon {
    font-size: 16px;
  }
}

/* Mobile */
@media (max-width: 767px) {
  .city-content-tabs {
    position: relative; /* Not sticky on mobile */
  }

  .city-tabs-nav {
    gap: 0;
  }

  .city-tab-button {
    flex-direction: column;
    gap: var(--msm-space-1);
    padding: var(--msm-space-3);
    font-size: var(--msm-font-size-xs);
    text-align: center;
  }

  .city-tab-icon {
    font-size: 20px; /* Bigger icon, smaller text on mobile */
  }

  .city-tab-label {
    display: block;
    font-size: var(--msm-font-size-xs);
  }

  .city-tab-badge {
    position: absolute;
    top: 4px;
    right: 4px;
  }
}

/* Very small mobile */
@media (max-width: 374px) {
  .city-tab-button {
    padding: var(--msm-space-2);
  }

  .city-tab-label {
    display: none; /* Icon only on very small screens */
  }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Focus styles */
.city-tab-button:focus {
  outline: 3px solid var(--msm-color-primary-500);
  outline-offset: -3px;
  z-index: 1;
}

/* Keyboard navigation indicator */
.city-tab-button:focus-visible {
  outline-color: var(--msm-color-primary-600);
  outline-width: 3px;
}

/* Screen reader only content */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .city-tab-button,
  .city-tabs-indicator,
  .city-tab-content.active {
    transition: none;
    animation: none;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .city-tab-button {
    border: 2px solid currentColor;
  }

  .city-tab-button.active {
    background: var(--msm-color-primary-100);
    border-color: var(--msm-color-primary-600);
  }
}

/* ============================================
   JUMP NAVIGATION (Optional Enhancement)
   ============================================ */

.city-tabs-jump {
  display: none; /* Hidden by default */
  margin-bottom: var(--msm-space-4);
}

@media print {
  .city-tabs-jump {
    display: block;
  }

  .city-tabs-jump-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 8px;
  }

  .city-tabs-jump-list {
    list-style: none;
    padding: 0;
  }

  .city-tabs-jump-list li {
    margin-bottom: 4px;
  }

  .city-tabs-jump-list a {
    color: #000;
    text-decoration: underline;
  }
}

/* ============================================
   SEO-SAFE HIDDEN CONTENT
   ============================================ */

/*
 * Important: We use position:absolute + left:-9999px instead of display:none
 * because display:none can be ignored by search engines in some cases.
 *
 * This technique ensures:
 * - Content is in the DOM and crawlable
 * - Content is not visible to users
 * - No accessibility issues (screen readers can still access via tab navigation)
 * - Better for SEO than display:none
 */

/* ============================================
   LOADING STATE
   ============================================ */

.city-tabs-loading {
  display: none;
  text-align: center;
  padding: var(--msm-space-12);
  color: var(--msm-color-text-secondary);
}

.city-tabs-loading.active {
  display: block;
}

.city-tabs-spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 4px solid var(--msm-color-border-subtle);
  border-top-color: var(--msm-color-primary-500);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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