/**
 * Premium Visibility Styles
 * Handles locked and dimmed states for premium features
 */

/* Base locked state */
.premium-locked {
  position: relative;
  cursor: pointer;
  opacity: 0.4;
  filter: grayscale(100%);
  transition: opacity 0.2s ease, filter 0.2s ease;
  pointer-events: auto;
}

/* Hover state - slight reveal */
.premium-locked:hover {
  opacity: 0.6;
  filter: grayscale(80%);
}

/* Focus state for keyboard accessibility */
.premium-locked:focus {
  outline: 2px solid var(--primary-color, #2563EB);
  outline-offset: 2px;
  opacity: 0.6;
}

/* Premium badge overlay */
.premium-badge {
  position: absolute;
  top: 5px;
  right: 5px;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: white;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 10px;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  pointer-events: none;
  z-index: 10;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s ease;
}

/* Badge animation on hover */
.premium-locked:hover .premium-badge {
  transform: scale(1.05);
}

/* Ensure badge doesn't interfere with click */
.premium-locked * {
  pointer-events: none;
}

/* Re-enable pointer events for the locked element itself */
.premium-locked {
  pointer-events: auto;
}

/* Dimmed state (different from locked - shows content but less prominent) */
.premium-dimmed {
  opacity: 0.4;
  filter: grayscale(100%);
  transition: opacity 0.2s ease, filter 0.2s ease;
  cursor: pointer;
}

.premium-dimmed:hover {
  opacity: 0.6;
  filter: grayscale(80%);
}

/* Lock icon overlay for buttons */
.premium-locked.btn::before,
.premium-locked button::before {
  content: '🔒';
  margin-right: 4px;
  font-size: 0.9em;
}

/* Mobile responsive adjustments */
@media (max-width: 768px) {
  .premium-badge {
    font-size: 9px;
    padding: 2px 6px;
    top: 3px;
    right: 3px;
  }

  /* Slightly higher opacity on mobile for better visibility */
  .premium-locked {
    opacity: 0.5;
  }

  .premium-locked:hover {
    opacity: 0.7;
  }
}

/* Dark mode adjustments */
@media (prefers-color-scheme: dark) {
  .premium-badge {
    background: linear-gradient(135deg, #f59e0b, #d97706);
  }

  .premium-locked:focus {
    outline-color: #60a5fa;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .premium-locked {
    border: 2px dashed #888;
  }

  .premium-badge {
    border: 2px solid white;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .premium-locked,
  .premium-dimmed,
  .premium-badge {
    transition: none;
  }

  .premium-locked:hover .premium-badge {
    transform: none;
  }
}

/* Specific styles for different locked element types */

/* Locked cards */
.premium-locked.card,
.premium-locked .card {
  border: 1px dashed rgba(251, 191, 36, 0.3);
}

/* Locked buttons */
.premium-locked.btn,
.premium-locked button {
  cursor: pointer;
}

/* Locked data displays (mastery rings, badges, etc.) */
.premium-locked[data-premium-feature="mastery"],
.premium-locked[data-premium-feature="understanding"] {
  opacity: 0.4;
  user-select: none;
}

/* Locked navigation items */
.premium-locked.nav-item,
.premium-locked .nav-item {
  opacity: 0.4;
}

/* Animation for when feature becomes unlocked */
@keyframes unlock-fade {
  from {
    opacity: 0.4;
    filter: grayscale(100%);
  }
  to {
    opacity: 1;
    filter: grayscale(0%);
  }
}

.premium-unlocking {
  animation: unlock-fade 0.5s ease forwards;
}

/* Tooltip for locked features (optional enhancement) */
.premium-locked[title]:hover::after {
  content: attr(title);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.9);
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  white-space: nowrap;
  margin-bottom: 8px;
  z-index: 100;
  pointer-events: none;
}

/* 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;
}

/* Blurred state for recommendations */
.premium-blurred {
  filter: blur(4px) grayscale(100%);
  opacity: 0.3;
  pointer-events: none;
  user-select: none;
}

.premium-blurred::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(4px);
}