#matrix-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  z-index: -1;
}

.matrix-item {
  position: absolute;
  top: -10vh;
  font-size: 22px;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  animation: fall linear infinite;
  white-space: nowrap;
}

@keyframes fall {
  0% { transform: translateY(-10vh) rotate(0deg); opacity: 0.9; }
  50% { transform: translateY(50vh) rotate(80deg); opacity: 1; }
  100% { transform: translateY(110vh) rotate(-120deg); opacity: 0.9; }
}