.scrolldown {
  --color: white;
  --sizeX: 30px;
  --sizeY: 50px;
  position: relative;
  width: var(--sizeX);
  height: var(--sizeY);
  margin-left: var(sizeX / 2);
  border: calc(var(--sizeX) / 10) solid var(--color);
  border-radius: 50px;
  box-sizing: border-box;
  margin-bottom: 16px;
  cursor: pointer;
}

.scrolldown::before {
  content: "";
  position: absolute;
  bottom: 30px;
  left: 50%;
  width: 6px;
  height: 6px;
  margin-left: -3px;
  background-color: var(--color);
  border-radius: 100%;
  animation: scrolldown-anim 2s infinite;
  box-sizing: border-box;
  box-shadow: 0px -5px 3px 1px #2a547066;
}

@keyframes scrolldown-anim {
  0% {
    opacity: 0;
    height: 6px;
  }

  40% {
    opacity: 1;
    height: 10px;
  }

  80% {
    transform: translate(0, 20px);
    height: 10px;
    opacity: 0;
  }

  100% {
    height: 3px;
    opacity: 0;
  }
}

.chevrons {
  padding: 6px 0 0 0;
  margin-left: -3px;
  margin-top: 48px;
  width: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.chevrondown {
  margin-top: -6px;
  position: relative;
  border: solid var(--color);
  border-width: 0 3px 3px 0;
  display: inline-block;
  width: 10px;
  height: 10px;
  transform: rotate(45deg);
}

.chevrondown:nth-child(odd) {
  animation: pulse54012 500ms ease infinite alternate;
}

.chevrondown:nth-child(even) {
  animation: pulse54012 500ms ease infinite alternate 250ms;
}

@keyframes pulse54012 {
  from {
    opacity: 0;
  }

  to {
    opacity: 0.5;
  }
}