/* Animations CSS */
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}
@keyframes float2 {
  0%, 100% {
    transform: translateY(0);
    transform: rotate(-20deg);
  }
  50% {
    transform: translateY(-20px);
    transform: rotate(-20deg);
  }
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px) rotate(5deg);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
    box-shadow: var(--shadow-md);
  }
  50% {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
  }
  100% {
    transform: scale(1);
    box-shadow: var(--shadow-md);
  }
}

@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  10%, 30%, 50%, 70%, 90% {
    transform: translateX(-5px);
  }
  20%, 40%, 60%, 80% {
    transform: translateX(5px);
  }
}

@keyframes pop {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  70% {
    transform: scale(1.1);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Element-specific animations */
.feature-icon {
  animation: pulse 3s infinite;
}

.card-visual {
  animation: float 6s ease-in-out infinite;
}

.feature-card:nth-child(1) {
  animation-delay: 0s;
}

.feature-card:nth-child(2) {
  animation-delay: 0.3s;
}

.feature-card:nth-child(3) {
  animation-delay: 0.6s;
}

/* Scroll animations */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered animations */
.stagger-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-item:nth-child(1) {
  transition-delay: 0.1s;
}

.stagger-item:nth-child(2) {
  transition-delay: 0.2s;
}

.stagger-item:nth-child(3) {
  transition-delay: 0.3s;
}

.stagger-item:nth-child(4) {
  transition-delay: 0.4s;
}

.stagger-item:nth-child(5) {
  transition-delay: 0.5s;
}

/* Input validation animation */
.input-shake {
  animation: shake 0.5s;
}

/* Success animation */
.success-animation {
  animation: pop 0.5s forwards;
}


.treasure-box{
  position:fixed;
  top:50%; left:50%;
  transform:translate(-50%,-50%);
  width: 40%;
  pointer-events:none; /* UI 操作を邪魔しない */
  z-index:9999;
}

/* ユーザーが「アニメ抑制」を選んでいる場合は非表示 */
@media (prefers-reduced-motion: reduce){
  .treasure-box{ display:none; }
}