/**
 * @file
 * Mobile Menu Component Styles
 *
 * WARN-inspired slide-out mobile menu with dark background.
 * Features accordion-style sub-menu expansion and animated hamburger.
 *
 * Uses plain CSS for compatibility with build process.
 */

/* ==========================================================================
   Mobile Menu Toggle Button (Hamburger)
   ========================================================================== */

button.mobile-menu-toggle {
  /* Touch target minimum 44x44px */
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0.5rem;

  /* Rounded white background - override browser defaults */
  background-color: #ffffff !important;
  background-image: none !important;
  border: none;
  cursor: pointer;
  border-radius: 0.375rem;

  /* Spacing from logo */
  margin-right: 1rem;
}

.mobile-menu-toggle:focus {
  outline: none;
  box-shadow: 0 0 0 2px #9ABD97; /* fdm-cambridge-blue */
}

.mobile-menu-toggle:hover .mobile-menu-toggle-bar {
  background-color: #E13A3E; /* fdm-red */
}

/* Hamburger icon container */
.mobile-menu-toggle-icon {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 24px;
  height: 24px;
}

/* Hamburger bars */
.mobile-menu-toggle-bar {
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: #9ca3af; /* gray-400 to match original */
  border-radius: 1px;
  transition: transform 200ms ease-in-out, opacity 200ms ease-in-out, background-color 200ms ease-in-out;
}

.mobile-menu-toggle-bar--top {
  top: 4px;
}

.mobile-menu-toggle-bar--middle {
  top: 50%;
  transform: translateY(-50%);
}

.mobile-menu-toggle-bar--bottom {
  bottom: 4px;
}

/* Animated hamburger to X transformation */
.mobile-menu-toggle.is-active .mobile-menu-toggle-bar--top {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle.is-active .mobile-menu-toggle-bar--middle {
  opacity: 0;
}

.mobile-menu-toggle.is-active .mobile-menu-toggle-bar--bottom {
  transform: translateY(-7px) rotate(-45deg);
}

/* Only show on mobile (< 1024px) */
@media (min-width: 1024px) {
  button.mobile-menu-toggle {
    display: none !important;
  }
}

/* ==========================================================================
   Mobile Menu Overlay
   ========================================================================== */

.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0);
  z-index: 40;
  visibility: hidden;
  pointer-events: none;
  transition: background-color 300ms ease-in-out, visibility 300ms ease-in-out;
}

.mobile-menu-overlay.is-active {
  background-color: rgba(0, 0, 0, 0.5);
  visibility: visible;
  pointer-events: auto;
}

/* ==========================================================================
   Mobile Menu Panel
   ========================================================================== */

.mobile-menu-panel {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;

  /* Width: 80% of viewport, max 320px */
  width: 80%;
  max-width: 320px;

  /* Dark background like WARN */
  background-color: #1f2937; /* gray-800 */

  /* Hidden off-screen by default */
  transform: translateX(-100%);
  visibility: hidden;

  /* Smooth slide transition */
  transition: transform 300ms ease-out, visibility 300ms ease-out;

  /* Above overlay */
  z-index: 50;

  /* Flex layout for content structure */
  display: flex;
  flex-direction: column;

  /* Allow scrolling within panel */
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-menu-panel.is-open {
  transform: translateX(0);
  visibility: visible;
}

/* ==========================================================================
   Mobile Menu Header
   ========================================================================== */

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1rem 1rem 1.5rem;
  border-bottom: 1px solid #374151; /* gray-700 */
  flex-shrink: 0;
}

.mobile-menu-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

/* Close button */
.mobile-menu-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0.5rem;
  color: white;
  background: transparent;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: color 200ms ease-in-out;
}

.mobile-menu-close:hover {
  color: #E13A3E; /* fdm-red */
}

.mobile-menu-close:focus {
  outline: none;
  box-shadow: 0 0 0 2px #9ABD97;
}

/* ==========================================================================
   Mobile Menu Content
   ========================================================================== */

.mobile-menu-content {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   Mobile Menu List
   ========================================================================== */

.mobile-menu-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* ==========================================================================
   Mobile Menu Item
   ========================================================================== */

.mobile-menu-item {
  list-style: none;
  border-bottom: 1px solid #374151; /* gray-700 */
}

/* Level-specific styles */
.mobile-menu-item--level-0 > .mobile-menu-accordion-trigger,
.mobile-menu-item--level-0 > .mobile-menu-link {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.875rem;
}

.mobile-menu-item--level-1 > .mobile-menu-accordion-trigger,
.mobile-menu-item--level-1 > .mobile-menu-link {
  font-weight: 600;
  font-size: 0.875rem;
  padding-left: 1.5rem;
}

.mobile-menu-item--level-2 > .mobile-menu-link {
  font-weight: 400;
  font-size: 0.8125rem;
  padding-left: 2rem;
  color: #9ca3af; /* gray-400 */
}

/* Active trail */
.mobile-menu-item.is-active-trail > .mobile-menu-accordion-trigger,
.mobile-menu-item.is-active-trail > .mobile-menu-link {
  color: #E13A3E; /* fdm-red */
}

/* ==========================================================================
   Mobile Menu Links
   ========================================================================== */

.mobile-menu-link {
  display: block;
  padding: 0.875rem 1rem;
  color: white;
  text-decoration: none;
  transition: color 200ms ease-in-out, background-color 200ms ease-in-out;

  /* Minimum touch target height */
  min-height: 44px;
  display: flex;
  align-items: center;
}

.mobile-menu-link:hover,
.mobile-menu-link:focus {
  color: #f3f4f6; /* gray-100 */
  background-color: #374151; /* gray-700 */
}

.mobile-menu-link:focus {
  outline: none;
  box-shadow: inset 0 0 0 2px #9ABD97;
}

/* View All link styling */
.mobile-menu-link--view-all {
  font-weight: 600;
  color: #E13A3E; /* fdm-red */
  font-size: 0.8125rem;
}

.mobile-menu-link--view-all:hover {
  color: white;
}

/* ==========================================================================
   Mobile Menu Accordion Trigger
   ========================================================================== */

.mobile-menu-accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.875rem 1rem;
  color: white;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: color 200ms ease-in-out, background-color 200ms ease-in-out;

  /* Minimum touch target height */
  min-height: 44px;
}

.mobile-menu-accordion-trigger:hover,
.mobile-menu-accordion-trigger:focus {
  background-color: #374151; /* gray-700 */
}

.mobile-menu-accordion-trigger:focus {
  outline: none;
  box-shadow: inset 0 0 0 2px #9ABD97;
}

/* Item title */
.mobile-menu-item-title {
  flex: 1;
}

/* Chevron icon */
.mobile-menu-chevron {
  width: 1.25rem;
  height: 1.25rem;
  color: #9ca3af; /* gray-400 */
  transition: transform 200ms ease;
  flex-shrink: 0;
}

/* Rotate chevron when expanded */
.mobile-menu-accordion-trigger[aria-expanded="true"] .mobile-menu-chevron {
  transform: rotate(90deg);
}

/* ==========================================================================
   Mobile Menu Submenu
   ========================================================================== */

.mobile-menu-submenu {
  list-style: none;
  margin: 0;
  padding: 0;
  background-color: #111827; /* gray-900 */
  overflow: hidden;

  /* Hidden by default with smooth animation */
  max-height: 0;
  transition: max-height 200ms ease;
}

/* When expanded - height will be set by JavaScript */
.mobile-menu-submenu.is-expanded {
  max-height: none;
}

/* Remove border on submenu items */
.mobile-menu-submenu .mobile-menu-item {
  border-bottom: none;
}

/* Nested submenu styling */
.mobile-menu-submenu .mobile-menu-submenu {
  background-color: #0d1117;
}

/* ==========================================================================
   Mobile Menu Account Section
   ========================================================================== */

.mobile-menu-account {
  margin-top: auto;
  padding: 1rem;
  border-top: 1px solid #374151; /* gray-700 */
  background-color: #111827; /* gray-900 */
}

.mobile-menu-account-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0.5rem;
  color: #9ca3af; /* gray-400 */
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 200ms ease-in-out;

  /* Touch target */
  min-height: 44px;
}

.mobile-menu-account-link:hover {
  color: white;
}

.mobile-menu-account-link svg {
  flex-shrink: 0;
}

/* ==========================================================================
   Body Scroll Lock
   ========================================================================== */

body.mobile-menu-open {
  overflow: hidden;
  position: fixed;
  width: 100%;
  height: 100%;
}

/* ==========================================================================
   Accessibility - Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .mobile-menu-panel,
  .mobile-menu-overlay,
  .mobile-menu-toggle-bar,
  .mobile-menu-chevron,
  .mobile-menu-submenu,
  .mobile-menu-link,
  .mobile-menu-accordion-trigger,
  .mobile-menu-close {
    transition-duration: 0.01ms !important;
  }
}

/* ==========================================================================
   Hide on Desktop
   ========================================================================== */

@media (min-width: 1024px) {
  .mobile-menu-panel,
  .mobile-menu-overlay {
    display: none;
  }
}