body[data-theme="sakura"] {
  background: linear-gradient(180deg, #1a0f1a 0%, #2d1830 60%, #4a1f3a 100%);
}
body[data-theme="sakura"] .sakura-petal {
  position: absolute;
  width: 14px; height: 14px;
  background: radial-gradient(circle at 30% 30%, #ffc0d8, #ff7faa);
  border-radius: 50% 0 50% 0;
  animation: sakura-fall linear infinite;
  opacity: .85;
  filter: drop-shadow(0 0 calc(4px * var(--bass, 0)) #ffaad4);
}
@keyframes sakura-fall {
  0% { transform: translateY(-50px) translateX(0) rotate(0); opacity: 0; }
  10% { opacity: .9; }
  100% { transform: translateY(110vh) translateX(80px) rotate(720deg); opacity: 0.3; }
}
body[data-theme="sakura"] .profile-card {
  box-shadow: 0 0 calc(40px + 60px * var(--bass, 0)) rgba(255, 127, 170, .5);
  transform: scale(calc(1 + 0.04 * var(--beat, 0)));
  transition: transform .08s linear;
}