/**
 * ELIO SOLAR - MEGA MENU STYLES
 * Mega menu component for Services navigation
 * Version: 2.0
 */

/* ============================================
   CSS CUSTOM PROPERTIES
   ============================================ */

:root {
  /* Mega Menu Container */
  --mega-menu-padding: 40px;
  --mega-menu-bg: #ffffff;
  --mega-menu-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
  --mega-menu-border-radius: 0 0 20px 20px;
  --mega-menu-max-width: 1400px;

  /* Mega Menu Animation */
  --mega-menu-duration: 0.35s;
  --mega-menu-easing: cubic-bezier(0.4, 0, 0.2, 1);
  --mega-menu-stagger-delay: 50ms;

  /* Mega Menu Grid */
  --mega-menu-columns: 4;
  --mega-menu-gap: 32px;

  /* Mega Menu Card */
  --mega-card-padding: 24px;
  --mega-card-border-radius: 16px;
  --mega-card-bg-hover: #f8fafc;

  /* Mega Menu Typography */
  --mega-title-size: 18px;
  --mega-title-weight: 700;
  --mega-desc-size: 14px;
  --mega-desc-color: #64748b;
  --mega-link-size: 14px;
  --mega-link-color: #3b82f6;

  /* Icon */
  --mega-icon-size: 40px;
  --mega-icon-color: #3b82f6;
}

/* ============================================
   MEGA MENU CONTAINER
   ============================================ */

.mega-menu {
  position: fixed;
  top: var(--header-height);
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  width: 95vw;
  max-width: var(--mega-menu-max-width);
  background: var(--mega-menu-bg);
  box-shadow: var(--mega-menu-shadow);
  border-radius: var(--mega-menu-border-radius);
  padding: var(--mega-menu-padding);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--mega-menu-duration) var(--mega-menu-easing),
              visibility var(--mega-menu-duration) var(--mega-menu-easing),
              transform var(--mega-menu-duration) var(--mega-menu-easing),
              top var(--header-transition);
  z-index: var(--z-mega-menu);
  pointer-events: none;
}

/* Open state */
.mega-menu[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* Adjust position when header is scrolled */
.site-header[data-header-scrolled="true"] ~ * .mega-menu,
.site-header[data-header-scrolled="true"] .mega-menu {
  top: var(--header-height-scrolled);
}

/* ============================================
   MEGA MENU GRID
   ============================================ */

.mega-menu-grid {
  display: grid;
  grid-template-columns: repeat(var(--mega-menu-columns), 1fr);
  gap: var(--mega-menu-gap);
}

/* ============================================
   MEGA MENU CARD
   ============================================ */

.mega-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: var(--mega-card-padding);
  border-radius: var(--mega-card-border-radius);
  background: transparent;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px);
  animation: slideInUp var(--mega-menu-duration) var(--mega-menu-easing) forwards;
}

/* Staggered animation for cards */
.mega-card:nth-child(1) { animation-delay: 0ms; }
.mega-card:nth-child(2) { animation-delay: calc(var(--mega-menu-stagger-delay) * 1); }
.mega-card:nth-child(3) { animation-delay: calc(var(--mega-menu-stagger-delay) * 2); }
.mega-card:nth-child(4) { animation-delay: calc(var(--mega-menu-stagger-delay) * 3); }

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Card hover state */
.mega-card:hover {
  background: var(--mega-card-bg-hover);
  transform: scale(1.02) translateY(0);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* Card focus state (keyboard navigation) */
.mega-card:focus {
  outline: 2px solid currentColor;
  outline-offset: 4px;
  background: var(--mega-card-bg-hover);
}

/* ============================================
   MEGA CARD CONTENT
   ============================================ */

/* Icon */
.mega-card-icon {
  width: var(--mega-icon-size) !important;
  height: var(--mega-icon-size) !important;
  max-width: var(--mega-icon-size) !important;
  max-height: var(--mega-icon-size) !important;
  flex-shrink: 0;
  fill: var(--mega-icon-color);
  transition: transform 0.3s ease;
}

.mega-card:hover .mega-card-icon {
  transform: scale(1.1);
}

/* Badge (e.g., "2 min", "Nuovo") */
.mega-card-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

/* Title */
.mega-card-title {
  font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
  font-size: var(--mega-title-size);
  font-weight: var(--mega-title-weight);
  line-height: 1.3;
  margin: 0;
  color: #1f2937;
}

/* Description */
.mega-card-desc {
  font-size: var(--mega-desc-size);
  line-height: 1.6;
  color: var(--mega-desc-color);
  margin: 0;
  flex: 1;
}

/* Link */
.mega-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--mega-link-size);
  font-weight: 600;
  color: var(--mega-link-color);
  text-decoration: none;
  transition: gap 0.3s ease;
}

.mega-card:hover .mega-card-link {
  gap: 10px;
}

.mega-card-link-arrow {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease;
}

.mega-card:hover .mega-card-link-arrow {
  transform: translateX(4px);
}

/* ============================================
   MEGA MENU FEATURES LIST (alternative layout)
   ============================================ */

.mega-features-list {
  list-style: none;
  padding: 0;
  margin: 12px 0 0 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mega-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--mega-desc-color);
}

.mega-feature-item::before {
  content: "✓";
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  border-radius: 50%;
  font-size: 10px;
  font-weight: 700;
  flex-shrink: 0;
}

/* ============================================
   RESPONSIVE - TABLET
   ============================================ */

@media (max-width: 1200px) {
  :root {
    --mega-menu-padding: 32px;
    --mega-menu-gap: 24px;
    --mega-card-padding: 20px;
  }

  .mega-menu {
    width: calc(100vw - 32px);
    max-width: calc(100vw - 32px);
  }
}

@media (max-width: 1023px) {
  :root {
    --mega-menu-columns: 2;
    --mega-menu-padding: 24px;
    --mega-menu-gap: 20px;
  }
}

/* ============================================
   RESPONSIVE - MOBILE
   ============================================ */

@media (max-width: 767px) {
  :root {
    --mega-menu-columns: 1;
    --mega-menu-padding: 20px;
    --mega-card-padding: 16px;
  }

  .mega-menu {
    border-radius: 0 0 16px 16px;
    width: calc(100vw - 16px);
    max-width: calc(100vw - 16px);
  }

  .mega-card-badge {
    position: static;
    align-self: flex-start;
    margin-top: -4px;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  .mega-menu {
    display: none !important;
  }
}

/* ============================================
   REDUCED MOTION SUPPORT
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  .mega-menu,
  .mega-card,
  .mega-card-icon,
  .mega-card-link,
  .mega-card-link-arrow {
    transition: none !important;
    animation: none !important;
  }

  .mega-card {
    opacity: 1;
    transform: translateY(0);
  }

  .mega-menu[aria-hidden="false"] {
    transform: translateX(-50%) translateY(0);
  }

  .mega-card:hover {
    transform: none;
  }

  .mega-card:hover .mega-card-icon {
    transform: none;
  }

  .mega-card:hover .mega-card-link-arrow {
    transform: none;
  }
}

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

/* Focus trap helper */
.mega-menu[data-focus-trap="active"] {
  outline: 2px solid currentColor;
  outline-offset: -2px;
}

/* Screen reader only text */
.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;
}