* {
  margin: 0;
  padding: 0;
}

@media screen and (min-width: 1200px) {
  #main{
    width: 412px;
    height: 915px;
    border: 1px solid #CCCCCC;
  }
}

#main-page-loading {
  background: #FFFFFF;
  width: 100%;
  height: 100%;
  position: fixed;
  z-index: 999;
  color: #555555;
}

#loading-box {
  position: relative;
  top:25%;
  font-size: 24px;
  width: 100%;
  max-height: 100vh;
  max-width: 450px;
  margin: 0 auto;
  aspect-ratio: 1;
  text-align: center;
}


@keyframes grow-and-fade {
  0% {
    opacity: 0;
    transform: scale(0.1) translatez(0);
  }
  40% {
    opacity: 1;
  }
  60% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: scale(1) translatez(0);
  }
}
@keyframes pulsing-fade {
  0% {
    opacity: 0;
  }
  20% {
    opacity: 0;
  }
  40% {
    opacity: 0.8;
  }
  60% {
    opacity: 0;
  }
}
.triangle-wrapper {
  position: relative;
  width: 50%;
  aspect-ratio: 1;
  margin: 0 auto;
}
.triangle {
  animation: grow-and-fade 2000ms linear infinite;
  height: 100%;
  aspect-ratio: 1;
  left: 0;
  opacity: 0;
  position: absolute;
  top: 0%;
  transform: translatez(0);
  transform-origin: 50% 60%;
  will-change: opacity, transform;
}

.triangle-loading {
  animation: pulsing-fade 6000ms ease infinite;
  color: #555555;
  font-family: 'Helvetica Neue', Helvetica, sans-serif;
  font-size: 18px;
  font-weight: 300;
  left: 50%;
  letter-spacing: 8px;
  margin-left: 4px;
  margin-top: 10px;
  opacity: 0;
  position: absolute;
  top: 100%;
  transform: translate3d(-50%, -50%, 0);
  text-transform: uppercase;
}
.triangle-svg {
  margin-top: -20px;
  opacity: 0.5;
  overflow: visible;
}
.triangle-polygon {
  stroke-width: 5px;
}
.triangle-1 {
  animation-delay: 0ms;
}
.triangle-1 .triangle-polygon {
  stroke: hotpink;
}
.triangle-2 {
  animation-delay: 400ms;
}
.triangle-2 .triangle-polygon {
  stroke: aqua;
}
.triangle-3 {
  animation-delay: 800ms;
}
.triangle-3 .triangle-polygon {
  stroke: cornflowerblue;
}
.triangle-4 {
  animation-delay: 1200ms;
}
.triangle-4 .triangle-polygon {
  stroke: yellow;
}
.triangle-5 {
  animation-delay: 1600ms;
}
.triangle-5 .triangle-polygon {
  stroke: white;
}