/**
 * STEMulus Kids Tech — 3D SVG Motion System & Lighting Engine
 * Agency-grade depth, specular highlights, and fluid micro-animations.
 */

:root {
  --icon-3d-shadow-color: rgba(15, 23, 42, 0.18);
  --icon-3d-shadow-ambient: 0 10px 25px -5px var(--icon-3d-shadow-color), 0 8px 10px -6px var(--icon-3d-shadow-color);
  --icon-3d-ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --icon-3d-ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base 3D SVG Icon Container */
.icon-3d {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
  position: relative;
  line-height: 1;
  flex-shrink: 0;
  transform-style: preserve-3d;
  perspective: 1000px;
  transition: transform 0.35s var(--icon-3d-ease-spring), filter 0.35s var(--icon-3d-ease-smooth);
}

.icon-3d svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.08));
  transition: filter 0.3s ease, transform 0.3s ease;
}

/* Sizes */
.icon-3d-xs { width: 14px; height: 14px; }
.icon-3d-sm { width: 18px; height: 18px; }
.icon-3d-md { width: 24px; height: 24px; }
.icon-3d-lg { width: 32px; height: 32px; }
.icon-3d-xl { width: 48px; height: 48px; }
.icon-3d-2xl { width: 64px; height: 64px; }
.icon-3d-hero { width: 88px; height: 88px; }

/* Micro-Interactions on Hover */
.icon-3d:hover {
  transform: translateY(-2px) scale(1.06) rotateX(4deg);
}
.icon-3d:hover svg {
  filter: drop-shadow(0 12px 18px rgba(0, 0, 0, 0.16));
}

/* Animation Keyframes */

/* 1. Fluid Levitation (Z-axis float) */
@keyframes iconFloat3D {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-5px) rotate(1.5deg);
  }
}

/* 2. Radial Pulse Glow */
@keyframes iconPulseGlow {
  0%, 100% {
    transform: scale(1);
    filter: drop-shadow(0 4px 10px rgba(244, 96, 12, 0.25));
  }
  50% {
    transform: scale(1.05);
    filter: drop-shadow(0 8px 20px rgba(244, 96, 12, 0.45));
  }
}

/* 3. Rocket Thruster Flame flicker */
@keyframes rocketThrustFlame {
  0%, 100% {
    transform: scaleY(1) translateY(0);
    opacity: 0.95;
  }
  50% {
    transform: scaleY(1.3) translateY(2px);
    opacity: 1;
  }
}

/* 4. Clock Hands Ticking */
@keyframes clockTickSec {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 5. Faceted Star Twinkle & Specular Sweep */
@keyframes starTwinkle {
  0%, 100% {
    transform: rotate(0deg) scale(1);
    filter: brightness(1);
  }
  25% {
    transform: rotate(3deg) scale(1.08);
    filter: brightness(1.2) drop-shadow(0 0 10px rgba(251, 191, 36, 0.7));
  }
  75% {
    transform: rotate(-3deg) scale(0.96);
    filter: brightness(0.95);
  }
}

/* 6. Graduation Tassel Gentle Sway */
@keyframes capTasselSway {
  0%, 100% {
    transform: rotate(0deg);
    transform-origin: top center;
  }
  50% {
    transform: rotate(12deg);
    transform-origin: top center;
  }
}

/* 7. Checkmark / Success Pop */
@keyframes checkBadgePop {
  0% {
    transform: scale(0.6);
    opacity: 0;
  }
  70% {
    transform: scale(1.12);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* 8. Orbital Loop Spin (Sync / Refresh) */
@keyframes orbitalSpin3D {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* 9. High Voltage Electric Flicker */
@keyframes boltVoltage {
  0%, 100% { opacity: 1; filter: drop-shadow(0 0 4px #fbbf24); }
  30% { opacity: 0.82; }
  35% { opacity: 1; filter: drop-shadow(0 0 12px #f59e0b); }
  70% { opacity: 0.9; }
  75% { opacity: 1; filter: drop-shadow(0 0 14px #fbbf24); }
}

/* 10. Candle Flame Flicker */
@keyframes candleFlicker {
  0%, 100% { transform: scale(1) skewX(0deg); }
  25% { transform: scale(1.1, 0.95) skewX(2deg); }
  75% { transform: scale(0.95, 1.1) skewX(-2deg); }
}

/* Motion Activation Classes */
.motion-float {
  animation: iconFloat3D 3.6s ease-in-out infinite;
}
.motion-pulse {
  animation: iconPulseGlow 2.8s ease-in-out infinite;
}
.motion-spin {
  animation: orbitalSpin3D 2.5s linear infinite;
}
.motion-twinkle {
  animation: starTwinkle 3s ease-in-out infinite;
}
.motion-pop {
  animation: checkBadgePop 0.5s var(--icon-3d-ease-spring) forwards;
}
.motion-voltage {
  animation: boltVoltage 2s ease-in-out infinite;
}

/* Internal SVG Animated Sub-elements */
.icon-3d svg .anim-flame {
  transform-origin: center top;
  animation: rocketThrustFlame 0.8s ease-in-out infinite;
}
.icon-3d svg .anim-tassel {
  transform-origin: 32px 18px;
  animation: capTasselSway 2.5s ease-in-out infinite;
}
.icon-3d svg .anim-second-hand {
  transform-origin: 32px 32px;
  animation: clockTickSec 12s linear infinite;
}
.icon-3d svg .anim-candle {
  transform-origin: 32px 16px;
  animation: candleFlicker 1.2s ease-in-out infinite;
}
.icon-3d svg .anim-spin-part {
  transform-origin: 32px 32px;
  animation: orbitalSpin3D 3s linear infinite;
}

/* Badge Wrappers */
.icon-3d-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(241, 245, 249, 0.8));
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08), inset 0 1px 1px rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(226, 232, 240, 0.8);
}
.icon-3d-badge-dark {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.8));
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25), inset 0 1px 1px rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.08);
}