/* CET-Vocab Pro Custom Styles */

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(156, 163, 175, 0.4);
  border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(156, 163, 175, 0.7);
}

/* 3D Card Flip Animation */
.perspective-1000 {
  perspective: 1000px;
}
.transform-style-3d {
  transform-style: preserve-3d;
}
.backface-hidden {
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.rotate-y-180 {
  transform: rotateY(180deg);
}

.flashcard {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
}

/* Keyboard hint badge */
.kbd-hint {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.125rem 0.375rem;
  font-size: 0.7rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  background-color: rgba(243, 244, 246, 0.8);
  border: 1px solid rgba(209, 213, 219, 0.8);
  border-radius: 0.25rem;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.05);
}
.dark .kbd-hint {
  background-color: rgba(55, 65, 81, 0.8);
  border-color: rgba(75, 85, 99, 0.8);
  color: #e5e7eb;
}

/* Safe Area Insets for iOS Home Indicator and Notch */
.safe-bottom {
  padding-bottom: max(1rem, env(safe-area-inset-bottom));
}

/* Smooth Pulse */
@keyframes pulse-subtle {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.95; transform: scale(1.02); }
}
.animate-pulse-subtle {
  animation: pulse-subtle 3s ease-in-out infinite;
}