/* ==============================================================================
   DYNAMIC ANIMATION KEYFRAMES
   ============================================================================== */
/* ==============================================================================
   SPLASH SCREEN (PWA起動時)
   ============================================================================== */
#splash-screen {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  animation: splash-in 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

#splash-screen.hide {
  animation: splash-out 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

#splash-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  animation: splash-avatar-in 0.5s 0.1s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

#splash-title {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  color: var(--color-white);
  animation: splash-text-in 0.4s 0.25s ease both;
}

#splash-sub {
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  animation: splash-text-in 0.4s 0.35s ease both;
}

@keyframes splash-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes splash-out {
  from {
    opacity: 1;
    transform: scale(1);
  }
  to {
    opacity: 0;
    transform: scale(1.04);
    pointer-events: none;
  }
}

@keyframes splash-avatar-in {
  from {
    opacity: 0;
    transform: scale(0.7);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes splash-text-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes tab-fade-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes item-fade-in {
  from {
    opacity: 0;
    transform: translateX(-4px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes logo-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-4px);
  }
}

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