/* Background animation */
@keyframes gradient {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.animate-gradient {
  background-size: 200% 200%;
  animation: gradient 10s ease infinite;
}

/* Scene */
.scene {
  width: 100px;
  height: 100px;
  perspective: 600px;
  margin: auto;
}

/* Cube (3D Box) */
.cube {
  width: 100px;
  height: 100px;
  position: relative;
  transform-style: preserve-3d;
  transform: rotateX(0deg) rotateY(0deg);
  transition: transform 2s ease-out;
  cursor: pointer;
}

.cube.challenge .face {
  background: linear-gradient(135deg, #22c55e, #16a34a);
}

.cube .face {
  position: absolute;
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, #06b6d4, #3b82f6);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  font-size: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Position faces */
.front { transform: rotateY(0deg) translateZ(50px); }
.back { transform: rotateY(180deg) translateZ(50px); }
.right { transform: rotateY(90deg) translateZ(50px); }
.left { transform: rotateY(-90deg) translateZ(50px); }
.top { transform: rotateX(90deg) translateZ(50px); }
.bottom { transform: rotateX(-90deg) translateZ(50px); }

/* Streak Badge */
.streak-badge {
  background: linear-gradient(90deg, #facc15, #f97316);
  color: #1f2937;
  font-weight: bold;
  padding: 8px 16px;
  border-radius: 12px;
  display: inline-block;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  font-size: 1rem;
  animation: pulse 1.5s infinite alternate;
}

/* Gentle pulse animation */
@keyframes pulse {
  0% { transform: scale(1); }
  100% { transform: scale(1.05); }
}

/* Glow animation when streak increases */
.glow {
  animation: glowAnim 1s ease forwards;
}

@keyframes glowAnim {
  0% {
    box-shadow: 0 0 10px #facc15;
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 20px #facc15, 0 0 30px #f97316;
    transform: scale(1.1);
  }
  100% {
    box-shadow: 0 0 10px #facc15;
    transform: scale(1);
  }
}