/**
 * Scroll Reveal Animation System
 * 
 * Modern, performant scroll-triggered animations using CSS classes
 * and Intersection Observer API for optimal performance.
 * 
 * Features:
 * - GPU-accelerated transforms
 * - Reduced motion support
 * - Staggered animations
 * - Mobile-optimized
 */

/* ==========================================================================
   BASE REVEAL STYLES
   ========================================================================== */

.reveal-item {
  opacity: 0;
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
  backface-visibility: hidden;
  perspective: 1000px;
}

.reveal-item.revealed {
  opacity: 1;
}

/* ==========================================================================
   REVEAL DIRECTIONS
   ========================================================================== */

/* Fade Up */
.reveal-item--up {
  transform: translateY(60px) scale(0.95);
}

.reveal-item--up.revealed {
  transform: translateY(0) scale(1);
}

/* Fade Down */
.reveal-item--down {
  transform: translateY(-60px) scale(0.95);
}

.reveal-item--down.revealed {
  transform: translateY(0) scale(1);
}

/* Fade Left */
.reveal-item--left {
  transform: translateX(-60px) scale(0.95);
}

.reveal-item--left.revealed {
  transform: translateX(0) scale(1);
}

/* Fade Right */
.reveal-item--right {
  transform: translateX(60px) scale(0.95);
}

.reveal-item--right.revealed {
  transform: translateX(0) scale(1);
}

/* Scale In */
.reveal-item--scale {
  transform: scale(0.8);
}

.reveal-item--scale.revealed {
  transform: scale(1);
}

/* Fade Only */
.reveal-item--fade {
  transform: none;
}

.reveal-item--fade.revealed {
  transform: none;
}

/* ==========================================================================
   STAGGER DELAYS
   ========================================================================== */

.reveal-item--delay-1 {
  transition-delay: 0.1s;
}

.reveal-item--delay-2 {
  transition-delay: 0.2s;
}

.reveal-item--delay-3 {
  transition-delay: 0.3s;
}

.reveal-item--delay-4 {
  transition-delay: 0.4s;
}

.reveal-item--delay-5 {
  transition-delay: 0.5s;
}

.reveal-item--delay-6 {
  transition-delay: 0.6s;
}

/* Extended delays for featured properties on mobile */
@media (max-width: 768px) {
  .featured-properties-grid .reveal-item--delay-1 {
    transition-delay: 0.15s;
  }
  
  .featured-properties-grid .reveal-item--delay-2 {
    transition-delay: 0.3s;
  }
  
  .featured-properties-grid .reveal-item--delay-3 {
    transition-delay: 0.45s;
  }
  
  .featured-properties-grid .reveal-item--delay-4 {
    transition-delay: 0.6s;
  }
  
  .featured-properties-grid .reveal-item--delay-5 {
    transition-delay: 0.75s;
  }
  
  .featured-properties-grid .reveal-item--delay-6 {
    transition-delay: 0.9s;
  }
}

/* ==========================================================================
   MOBILE OPTIMIZATIONS
   ========================================================================== */

@media (max-width: 768px) {
  .reveal-item--up,
  .reveal-item--down {
    transform: translateY(50px) scale(0.96);
  }
  
  .reveal-item--left,
  .reveal-item--right {
    transform: translateX(50px) scale(0.96);
  }
  
  .reveal-item--scale {
    transform: scale(0.85);
  }
  
  /* Faster animations on mobile for better UX */
  .reveal-item {
    transition-duration: 0.7s;
    transition-timing-function: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  }
  
  /* More pronounced animation for featured property cards on mobile */
  .featured-property-card-overlay.reveal-item--up {
    transform: translateY(60px) scale(0.94);
  }
  
  .featured-property-card-overlay.reveal-item--up.revealed {
    transform: translateY(0) scale(1);
  }
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal-item {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  
  .reveal-item.revealed {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ==========================================================================
   PERFORMANCE OPTIMIZATIONS
   ========================================================================== */

.reveal-item {
  /* GPU acceleration */
  transform: translateZ(0);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Remove will-change after animation completes */
.reveal-item.revealed {
  will-change: auto;
}