body[data-theme="snow"] {
  background: linear-gradient(180deg, #0e1420 0%, #2a3450 100%);
}
body[data-theme="snow"] .snow-flake {
  position: absolute; color: #fff; font-size: 12px;
  animation: snow-fall linear infinite;
  user-select: none;
  text-shadow: 0 0 calc(8px * var(--bass, 0)) rgba(255,255,255,.8);
  animation-duration: calc((6s - 3s * var(--bass, 0)) * var(--speed, 1));
}
body[data-theme="snow"] .profile-card {
  transform: translateY(calc(-6px * var(--beat, 0)));
  transition: transform .08s linear;
}
@keyframes snow-fall {
  0%   { transform: translateY(-50px) translateX(0); opacity: 0; }
  10%  { opacity: 1; }
  100% { transform: translateY(110vh) translateX(40px); opacity: .8; }
}