html {
  height: 100%;
}

body {
  height: 100%;
  margin: 0;
 
  background: linear-gradient(to bottom, #202020, #111119);
}

.rain {
  position: absolute;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
}

.rain.back-row {
  display: none;
  z-index: 1;
  bottom: 60px;
  opacity: 0.5;
}

body.back-row-toggle .rain.back-row {
  display: block;
}

.drop {
  position: absolute;
  bottom: 100%;
  width: 15px;
  height: 120px;
  pointer-events: none;
  animation: drop 0.5s linear infinite;
}

@keyframes drop {
  0% {
    transform: translateY(0vh);
  }
  75% {
    transform: translateY(90vh);
  }
  100% {
    transform: translateY(90vh);
  }
}

.stem {
  width: 1px;
  height: 60%;
  margin-left: 7px;
  background: linear-gradient(to bottom, rgba(253, 200, 44), rgba(62, 123, 151));
  animation: stem 0.5s linear infinite;
}

@keyframes stem {
  0% {
    opacity: 1;
  }
  65% {
    opacity: 1;
  }
  75% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}

.splat {
  width: 15px;
  height: 10px;
  border-top: 2px dotted rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  opacity: 1;
  transform: scale(0);
  animation: splat 0.5s linear infinite;
  display: none;
}

body.splat-toggle .splat {
  display: block;
}

@keyframes splat {
  0% {
    opacity: 1;
    transform: scale(0);
  }
  80% {
    opacity: 1;
    transform: scale(0);
  }
  90% {
    opacity: 0.5;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.5);
  }
}

.toggles {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 3;
}

.toggle {
  position: absolute;
  left: 20px;
  width: 50px;
  height: 50px;
  line-height: 51px;
  box-sizing: border-box;
  text-align: center;
  font-family: sans-serif;
  font-size: 10px;
  font-weight: bold;
  background-color: rgba(255, 255, 255, 0.2);
  color: rgba(0, 0, 0, 0.5);
  border-radius: 50%;
  cursor: pointer;
  transition: background-color 0.3s;
}

.toggle:hover {
  background-color: rgba(255, 255, 255, 0.25);
}

.toggle:active {
  background-color: rgba(255, 255, 255, 0.3);
}

.toggle.active {
  background-color: rgba(255, 255, 255, 0.4);
}

.splat-toggle {
  top: 20px;
}

.back-row-toggle {
  top: 90px;
  line-height: 12px;
  padding-top: 14px;
}

.single-toggle {
  top: 160px;
}

body.single-toggle .drop {
  display: none;
}

body.single-toggle .drop:nth-child(10) {
  display: block;
}