/* ============================
   3D Interactive Effects
   ============================ */

/* Particle field canvas */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.8;
}

.main-content {
  position: relative;
  z-index: 1;
}

/* ============================
   Card 3D Tilt
   ============================ */
.card-3d {
  transform-style: preserve-3d;
  transition: transform 0.15s ease-out, box-shadow 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  will-change: transform;
}

.card-3d:hover {
  box-shadow: var(--shadow-lg), var(--shadow-glow-strong);
}

.card-3d-tilt {
  transform: perspective(800px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg)) scale3d(1.02, 1.02, 1.02);
}

/* ============================
   3D Floating Animation
   ============================ */
.float-3d {
  animation: float3D 6s ease-in-out infinite;
}

@keyframes float3D {
  0%, 100% { transform: translateY(0px) translateZ(0); }
  50% { transform: translateY(-6px) translateZ(12px); }
}

.float-3d-delayed {
  animation: float3D 6s ease-in-out 2s infinite;
}

/* ============================
   Glass Morphism (Dark Mode)
   ============================ */
[data-theme="dark"] .glass-3d {
  background: rgba(24, 24, 24, 0.6);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border: 1px solid rgba(255, 255, 255, 0.04);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.02);
}

[data-theme="dark"] .glass-3d:hover {
  background: rgba(30, 30, 30, 0.7);
  border-color: rgba(255, 255, 255, 0.06);
}

/* ============================
   Page 3D Transitions
   ============================ */
.page-3d-wrapper {
  perspective: 1200px;
  perspective-origin: 50% 0%;
}

.page-3d-content {
  transform-style: preserve-3d;
  transition: transform 0.55s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.45s ease;
}

.page-3d-content.page-enter {
  transform: rotateY(-12deg) translateZ(-80px) scale(0.94);
  opacity: 0;
}

.page-3d-content.page-leave {
  transform: rotateY(12deg) translateZ(-80px) scale(0.94);
  opacity: 0;
}

/* ============================
   Nav 3D Hover & Active
   ============================ */
.nav-item-3d {
  transform-style: preserve-3d;
  transition: transform 0.25s cubic-bezier(0.23, 1, 0.32, 1),
              box-shadow 0.25s ease,
              background 0.25s ease;
  perspective: 400px;
}

.nav-item-3d:hover {
  transform: translateX(6px) translateZ(12px) scale(1.02);
}

.nav-item-3d:active {
  transform: translateX(3px) translateZ(6px) scale(0.97);
}

.nav-item-3d.active {
  transform: translateX(4px) translateZ(8px);
}

/* Nav section titles 3D */
.nav-section-title {
  transform-style: preserve-3d;
  transition: transform 0.3s ease;
}

.nav-section:hover .nav-section-title {
  transform: translateZ(6px);
}

/* ============================
   3D Depth Utility Classes
   ============================ */
.depth-0 { transform: translateZ(0px); }
.depth-1 { transform: translateZ(10px); }
.depth-2 { transform: translateZ(20px); }
.depth-3 { transform: translateZ(30px); }
.depth-4 { transform: translateZ(50px); }
.depth-5 { transform: translateZ(80px); }
.depth-neg-1 { transform: translateZ(-10px); }
.depth-neg-2 { transform: translateZ(-20px); }

/* ============================
   3D Auth Modal
   ============================ */
.auth-modal-3d {
  transform-style: preserve-3d;
}

.modal-overlay.active .auth-modal-3d {
  animation: modal3DEnter 0.6s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

@keyframes modal3DEnter {
  0% {
    transform: perspective(1000px) rotateX(8deg) translateZ(-120px) scale(0.88);
    opacity: 0;
  }
  100% {
    transform: perspective(1000px) rotateX(0deg) translateZ(0) scale(1);
    opacity: 1;
  }
}

/* ============================
   3D Theme Toggle
   ============================ */
.theme-toggle-3d {
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  transform-style: preserve-3d;
}

.theme-toggle-3d:hover {
  transform: rotate(-20deg) scale(1.12) translateZ(8px);
}

.theme-toggle-3d:active {
  transform: rotate(-10deg) scale(0.95);
}

/* ============================
   Card Shine Effect
   ============================ */
.shine-3d {
  position: relative;
  overflow: hidden;
}

.shine-3d::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.03),
    transparent
  );
  transition: left 0.7s cubic-bezier(0.23, 1, 0.32, 1);
  pointer-events: none;
  z-index: 2;
}

.shine-3d:hover::before {
  left: 150%;
}

[data-theme="light"] .shine-3d::before {
  background: linear-gradient(
    90deg,
    transparent,
    rgba(0, 0, 0, 0.02),
    transparent
  );
}

/* ============================
   3D Button Effects
   ============================ */
.btn-3d {
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.2s ease;
}

.btn-3d:hover {
  transform: translateY(-2px) translateZ(10px) scale(1.03);
  box-shadow: 0 8px 25px var(--primary-glow);
}

.btn-3d:active {
  transform: translateY(1px) translateZ(4px) scale(0.97);
}

/* ============================
   3D Input Focus
   ============================ */
.input-3d {
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  transform-style: preserve-3d;
}

.input-3d:focus {
  transform: translateZ(4px) scale(1.01);
  box-shadow: 0 4px 20px var(--primary-glow);
}

/* ============================
   3D Premium Glow Border
   ============================ */
.premium-border-3d {
  position: relative;
}

.premium-border-3d::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--accent), var(--primary), var(--accent-light), var(--primary));
  background-size: 300% 300%;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.4s ease;
  animation: borderShimmer 4s ease infinite;
}

.premium-border-3d:hover::after {
  opacity: 0.5;
}

@keyframes borderShimmer {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ============================
   Staggered 3D Entrance
   ============================ */
.stagger-3d > * {
  opacity: 0;
  transform: perspective(600px) rotateX(4deg) translateY(20px) translateZ(-20px);
  animation: staggerEnter 0.6s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

.stagger-3d > *:nth-child(1) { animation-delay: 0.05s; }
.stagger-3d > *:nth-child(2) { animation-delay: 0.1s; }
.stagger-3d > *:nth-child(3) { animation-delay: 0.15s; }
.stagger-3d > *:nth-child(4) { animation-delay: 0.2s; }
.stagger-3d > *:nth-child(5) { animation-delay: 0.25s; }
.stagger-3d > *:nth-child(6) { animation-delay: 0.3s; }
.stagger-3d > *:nth-child(7) { animation-delay: 0.35s; }
.stagger-3d > *:nth-child(8) { animation-delay: 0.4s; }
.stagger-3d > *:nth-child(9) { animation-delay: 0.45s; }
.stagger-3d > *:nth-child(10) { animation-delay: 0.5s; }

@keyframes staggerEnter {
  to {
    opacity: 1;
    transform: perspective(600px) rotateX(0deg) translateY(0) translateZ(0);
  }
}

/* ============================
   3D Scroll Reveal
   ============================ */
.reveal-3d {
  opacity: 0;
  transform: perspective(800px) rotateX(3deg) translateY(30px) translateZ(-30px);
  transition: opacity 0.7s cubic-bezier(0.23, 1, 0.32, 1),
              transform 0.7s cubic-bezier(0.23, 1, 0.32, 1);
}

.reveal-3d.visible {
  opacity: 1;
  transform: perspective(800px) rotateX(0deg) translateY(0) translateZ(0);
}

/* ============================
   3D Stat Card Glow Ring
   ============================ */
.stat-glow-3d {
  position: relative;
}

.stat-glow-3d::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--primary), transparent 50%, var(--accent)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.stat-glow-3d:hover::before {
  opacity: 0.6;
}

/* ============================
   3D Logo
   ============================ */
.logo-3d {
  transform-style: preserve-3d;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo-3d:hover {
  transform: translateZ(12px) scale(1.05);
}

/* ============================
   3D Section Headers
   ============================ */
.section-header-3d {
  transform-style: preserve-3d;
  transition: transform 0.3s ease;
}

.section-header-3d:hover {
  transform: translateZ(6px);
}