/* ===== Partikel ===== */
.particle{
  position:fixed;
  border-radius:50%;
  opacity:.6;
  pointer-events:none;
  animation:floatParticle linear infinite;
  animation-fill-mode: both;     /* Wichtig: während Delay unten bleiben (0%-Keyframe) */
  z-index:-1;
  will-change: transform;        /* Performance */
}
@keyframes floatParticle{
  0%   { transform:translateY(100vh) scale(.5) }
  100% { transform:translateY(-10vh) scale(1) }
}