/* ===== Animation Utility Classes ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform, opacity;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered Delay Helpers */
.reveal-delay-1 {
  transition-delay: 100ms;
}
.reveal-delay-2 {
  transition-delay: 200ms;
}
.reveal-delay-3 {
  transition-delay: 300ms;
}
.reveal-delay-4 {
  transition-delay: 400ms;
}

/* ===== Hover Lift Effects ===== */
.hover-lift {
  transition: transform 0.3s ease;
}
.hover-lift:hover {
  transform: translateY(-5px);
}

.btn-hover-lift {
  transition: transform 0.15s ease;
}
.btn-hover-lift:hover {
  transform: translateY(-1px);
}

/* ===== Product Tabs ===== */
.tab-btn {
  position: relative;
  padding-bottom: 1.25rem;
  border-bottom: 2px solid transparent;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  color: #64748b;
  transition: color 0.3s ease;
  cursor: pointer;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}
.tab-btn:hover {
  color: #cbd5e1;
}
.tab-btn.active {
  color: #fff;
  border-bottom-color: #3b82f6;
}

/* ===== Specs Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.75);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  will-change: opacity;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 1.5rem;
  max-width: 960px;
  width: 92%;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform 0.25s ease;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  will-change: transform;
  /* iOS safe area support with fallback */
  padding-top: 0;
  padding-top: env(safe-area-inset-top, 0);
  padding-bottom: 0;
  padding-bottom: env(safe-area-inset-bottom, 0);
}
.modal-overlay.open .modal-content {
  transform: translateY(0);
}

/* Custom scrollbar for modal */
.modal-content::-webkit-scrollbar {
  width: 6px;
}
.modal-content::-webkit-scrollbar-track {
  background: transparent;
}
.modal-content::-webkit-scrollbar-thumb {
  background: #475569;
  border-radius: 3px;
}

/* ===== Gallery Thumbnail ===== */
.gallery-thumb {
  border: 2px solid transparent;
  border-radius: 0.75rem;
  overflow: hidden;
  cursor: pointer;
  transition:
    border-color 0.2s ease,
    opacity 0.2s ease;
  opacity: 0.6;
}
.gallery-thumb:hover,
.gallery-thumb.active {
  border-color: #3b82f6;
  opacity: 1;
}

/* ===== Spec Table ===== */
.spec-table {
  width: 100%;
  border-collapse: collapse;
}
.spec-table tr {
  border-bottom: 1px solid #334155;
}
.spec-table tr:last-child {
  border-bottom: none;
}
.spec-table td {
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
}
.spec-table td:first-child {
  color: #94a3b8;
  font-weight: 500;
  width: 40%;
}
.spec-table td:last-child {
  color: #e2e8f0;
}

/* ===== Product Tab Content Transitions ===== */
.tab-panel {
  display: none;
  animation: fadeIn 0.4s ease;
}
.tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Mobile Responsive ===== */
@media (max-width: 640px) {
  .modal-content {
    width: 100%;
    max-height: 100vh; /* Standard viewport height for maximum compatibility */
    border-radius: 1rem 1rem 0 0;
    margin: 0;
    padding-top: 8px;
  }
  .modal-overlay {
    align-items: flex-end;
  }
  .modal-overlay.open .modal-content {
    transform: translateY(0);
  }
  .spec-table td {
    padding: 0.5rem 0.65rem;
    font-size: 0.8rem;
    line-height: 1.4;
  }
  .spec-table td:first-child {
    width: auto;
    min-width: 90px;
  }
  .reveal {
    transform: translateY(20px);
  }
}

/* Disable hover effects on touch devices */
@media (hover: none) {
  .hover-lift:hover {
    transform: none;
    box-shadow: none;
  }
  .btn-hover-lift:hover {
    transform: none;
    box-shadow: none;
  }
}

/* Touch optimization */
button,
a {
  -webkit-tap-highlight-color: rgba(59, 130, 246, 0.3);
  touch-action: manipulation;
}

/* Active state for better feedback */
button:active,
a:active {
  opacity: 0.8;
}