.drop {
    position: absolute;
    width: 2px;
    height: 20px;
    top: -20px;
    background: linear-gradient(to bottom, rgb(90, 211, 255), rgb(114, 140, 218));
    animation: fall linear infinite;
    opacity: 0.7;
}

#rain {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1000;
  overflow: hidden;
}

@keyframes fall {
    0% { transform: translateY(-100px); }
    100% { transform: translateY(100vh); }
}

.drop:nth-child(1) { left: 65%; animation-duration: 0.8s; animation-delay: 0s; }
.drop:nth-child(2) { left: 10%; animation-duration: 1.2s; animation-delay: 0.2s; }
.drop:nth-child(3) { left: 95%; animation-duration: 1.5s; animation-delay: 0.4s; }
.drop:nth-child(4) { left: 30%; animation-duration: 1.0s; animation-delay: 0.6s; }
.drop:nth-child(5) { left: 80%; animation-duration: 1.3s; animation-delay: 0.8s; }
.drop:nth-child(6) { left: 45%; animation-duration: 1.6s; animation-delay: 1.0s; }
.drop:nth-child(7) { left: 5%; animation-duration: 1.1s; animation-delay: 1.2s; }
.drop:nth-child(8) { left: 100%; animation-duration: 1.4s; animation-delay: 1.4s; }
.drop:nth-child(9) { left: 55%; animation-duration: 1.7s; animation-delay: 1.6s; }
.drop:nth-child(10) { left: 25%; animation-duration: 1.9s; animation-delay: 1.8s; }
.drop:nth-child(11) { left: 75%; animation-duration: 1.2s; animation-delay: 2.0s; }
.drop:nth-child(12) { left: 40%; animation-duration: 1.5s; animation-delay: 2.2s; }
.drop:nth-child(13) { left: 15%; animation-duration: 1.0s; animation-delay: 2.4s; }
.drop:nth-child(14) { left: 90%; animation-duration: 1.3s; animation-delay: 2.6s; }
.drop:nth-child(15) { left: 50%; animation-duration: 1.6s; animation-delay: 2.8s; }
.drop:nth-child(16) { left: 20%; animation-duration: 1.1s; animation-delay: 3.0s; }
.drop:nth-child(17) { left: 35%; animation-duration: 1.4s; animation-delay: 3.2s; }
.drop:nth-child(18) { left: 60%; animation-duration: 1.7s; animation-delay: 3.4s; }
.drop:nth-child(19) { left: 85%; animation-duration: 1.9s; animation-delay: 3.6s; }
.drop:nth-child(20) { left: 70%; animation-duration: 1.2s; animation-delay: 3.8s; }