/* ═══════════════════════════════════════════════════════════════
   BENTO MAGNETIC - Advanced Cursor Interactions (2026)
   Magnetic attraction, 3D depth, particle effects, dynamic borders
   Inspired by: Apple WWDC 2026, Linear, Framer, Stripe Premium
   ═══════════════════════════════════════════════════════════════ */

/* ═══════════════════════════ CORE SETUP ═══════════════════════════ */

.bento-grid {
  --cursor-x: 50%;
  --cursor-y: 50%;
  position: relative;
}

.bento-card {
  --card-x: 0;
  --card-y: 0;
  --rotation-x: 0deg;
  --rotation-y: 0deg;
  --magnetic-pull: 0;
  
  position: relative;
  transform-style: preserve-3d;
  perspective: 1000px;
  
  /* Smooth spring animation for magnetic pull */
  transition: 
    transform 0.4s cubic-bezier(0.23, 1, 0.32, 1),
    box-shadow 0.3s ease;
}

/* ═══════════════════════ MAGNETIC ATTRACTION ═══════════════════════ */

.bento-card.magnetic-active {
  /* Cards lift and pull toward cursor */
  transform: 
    translate3d(
      calc(var(--card-x) * 8px),
      calc(var(--card-y) * 8px),
      30px
    )
    rotateX(calc(var(--rotation-x) * -1))
    rotateY(var(--rotation-y));
  
  /* Enhanced shadow during interaction */
  box-shadow: 
    0 20px 60px rgba(0, 0, 0, 0.4),
    0 8px 24px rgba(124, 92, 255, 0.2),
    0 0 0 1px rgba(124, 92, 255, 0.1);
}

/* Highlight card gets stronger pull */
.bento-card--highlight.magnetic-active {
  transform: 
    translate3d(
      calc(var(--card-x) * 12px),
      calc(var(--card-y) * 12px),
      40px
    )
    rotateX(calc(var(--rotation-x) * -1))
    rotateY(var(--rotation-y));
}

/* ═══════════════════ 3D PERSPECTIVE DEPTH ═══════════════════ */

/* Create depth layers inside cards */
.bento-card-inner {
  transform-style: preserve-3d;
  transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.bento-card.magnetic-active .bento-card-inner {
  transform: translateZ(20px);
}

/* Icon floats forward */
.bento-icon {
  transition: 
    transform 0.5s cubic-bezier(0.23, 1, 0.32, 1),
    filter 0.3s ease;
  transform-origin: center;
  will-change: transform;
}

.bento-card.magnetic-active .bento-icon {
  transform: 
    translateZ(40px)
    scale(1.15)
    rotate(calc(var(--rotation-y) * 0.5));
  filter: drop-shadow(0 8px 16px rgba(124, 92, 255, 0.3));
}

/* Content layers have subtle parallax */
.bento-title {
  transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.bento-card.magnetic-active .bento-title {
  transform: translateZ(15px);
}

.bento-desc {
  transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.bento-card.magnetic-active .bento-desc {
  transform: translateZ(10px);
}

/* ═══════════════════ DYNAMIC BORDER GLOW ═══════════════════ */

/* Animated gradient border that faces the cursor */
.bento-magnetic-border {
  position: absolute;
  inset: -1px;
  border-radius: var(--radius);
  padding: 2px;
  background: linear-gradient(
    calc(var(--rotation-y) * 2 + 135deg),
    rgba(124, 92, 255, 0.8) 0%,
    rgba(46, 229, 157, 0.6) 50%,
    rgba(252, 83, 86, 0.4) 100%
  );
  -webkit-mask: 
    linear-gradient(#fff 0 0) content-box, 
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 10;
}

.bento-card.magnetic-active .bento-magnetic-border {
  opacity: 1;
}

/* Rotating shine effect */
.bento-magnetic-shine {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: linear-gradient(
    calc(var(--rotation-y) * 3 + 45deg),
    transparent 0%,
    rgba(255, 255, 255, 0.1) 50%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 5;
}

.bento-card.magnetic-active .bento-magnetic-shine {
  opacity: 1;
}

/* ═══════════════════ CURSOR-FOLLOWING SPOTLIGHT ═══════════════════ */

.bento-magnetic-spotlight {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: radial-gradient(
    500px circle at var(--card-x, 50%) var(--card-y, 50%),
    rgba(124, 92, 255, 0.15) 0%,
    rgba(46, 229, 157, 0.08) 30%,
    transparent 60%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 1;
  mix-blend-mode: screen;
}

.bento-card.magnetic-active .bento-magnetic-spotlight {
  opacity: 1;
}

/* Highlight card gets stronger spotlight */
.bento-card--highlight .bento-magnetic-spotlight {
  background: radial-gradient(
    650px circle at var(--card-x, 50%) var(--card-y, 50%),
    rgba(124, 92, 255, 0.22) 0%,
    rgba(46, 229, 157, 0.12) 30%,
    rgba(252, 83, 86, 0.06) 50%,
    transparent 70%
  );
}

/* ═══════════════════ PARTICLE TRAIL ═══════════════════ */

/* Container for particle effects */
.bento-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 15;
  border-radius: var(--radius);
}

.bento-particle {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 92, 255, 0.8), transparent);
  pointer-events: none;
  animation: particle-fade 1.5s ease-out forwards;
  will-change: transform, opacity;
}

@keyframes particle-fade {
  0% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
  100% {
    opacity: 0;
    transform: scale(0.3) translateY(-20px);
  }
}

/* ═══════════════════ LIST ITEM ANIMATIONS ═══════════════════ */

.bento-list li {
  transition: 
    transform 0.4s cubic-bezier(0.23, 1, 0.32, 1),
    opacity 0.3s ease;
  transform-origin: left center;
}

.bento-card.magnetic-active .bento-list li {
  transform: translateX(6px) translateZ(8px);
  opacity: 1;
}

.bento-list li:nth-child(1) { transition-delay: 0.05s; }
.bento-list li:nth-child(2) { transition-delay: 0.1s; }
.bento-list li:nth-child(3) { transition-delay: 0.15s; }

/* ═══════════════════ GRID-LEVEL EFFECTS ═══════════════════ */

/* Ambient glow around active card */
.bento-grid::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    rgba(124, 92, 255, 0.08) 0%,
    transparent 70%
  );
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.5s ease;
  z-index: 0;
  left: var(--cursor-x);
  top: var(--cursor-y);
  transform: translate(-50%, -50%);
  mix-blend-mode: screen;
}

.bento-grid.has-magnetic-active::before {
  opacity: 1;
}

/* ═══════════════════ PERFORMANCE OPTIMIZATIONS ═══════════════════ */

/* Only enable will-change during interaction */
.bento-card.magnetic-active {
  will-change: transform, box-shadow;
}

.bento-card:not(.magnetic-active) {
  will-change: auto;
}

/* GPU acceleration */
.bento-card,
.bento-icon,
.bento-magnetic-border,
.bento-magnetic-spotlight {
  transform: translateZ(0);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

/* ═══════════════════ RESPONSIVE BREAKPOINTS ═══════════════════ */

/* Tablet: Reduce magnetic pull */
@media (max-width: 1024px) {
  .bento-card.magnetic-active {
    transform: 
      translate3d(
        calc(var(--card-x) * 4px),
        calc(var(--card-y) * 4px),
        20px
      )
      rotateX(calc(var(--rotation-x) * -0.5))
      rotateY(calc(var(--rotation-y) * 0.5));
  }
}

/* Mobile: Disable magnetic effects (touch devices) */
@media (hover: none) {
  .bento-card.magnetic-active {
    transform: none !important;
  }
  
  .bento-magnetic-border,
  .bento-magnetic-spotlight,
  .bento-particles {
    display: none;
  }
  
  .bento-card.magnetic-active .bento-icon {
    transform: scale(1.05);
  }
}

/* ═══════════════════ ACCESSIBILITY ═══════════════════ */

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .bento-card,
  .bento-icon,
  .bento-card-inner,
  .bento-title,
  .bento-desc,
  .bento-list li {
    transition: none !important;
    animation: none !important;
    transform: none !important;
  }
  
  .bento-magnetic-border,
  .bento-magnetic-spotlight,
  .bento-particles {
    display: none;
  }
}

/* Focus states for keyboard navigation */
.bento-card:focus-visible {
  outline: 2px solid rgba(124, 92, 255, 0.8);
  outline-offset: 4px;
}

/* ═══════════════════ DARK MODE SUPPORT ═══════════════════ */

@media (prefers-color-scheme: light) {
  .bento-magnetic-spotlight {
    background: radial-gradient(
      500px circle at var(--card-x, 50%) var(--card-y, 50%),
      rgba(124, 92, 255, 0.08) 0%,
      rgba(46, 229, 157, 0.04) 30%,
      transparent 60%
    );
  }
  
  .bento-card.magnetic-active {
    box-shadow: 
      0 20px 60px rgba(0, 0, 0, 0.15),
      0 8px 24px rgba(124, 92, 255, 0.1);
  }
}