.back-top{
    position:fixed;
    right:30px;
    bottom:30px;

    width:60px;
    height:60px;

    border-radius:50%;

    display:flex;
    align-items:center;
    justify-content:center;

    background:rgba(255,255,255,.15);
    backdrop-filter:blur(10px);

    color:#fff;
    text-decoration:none;

    font-size:12px;
    letter-spacing:.15em;

    border:1px solid rgba(255,255,255,.3);

    z-index:1000;

    transition:.3s;
}

.back-top:hover{
    background:rgba(255,255,255,.35);
    transform:translateY(-5px);
}

@media(max-width:767px){

    .back-top{
        right:20px;
        bottom:20px;

        width:50px;
        height:50px;
    }

}

html,
body {
  position: relative;
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  background: #000;
  color: #fff;
  line-height: 1.5;
  font-family: -apple-system, system-ui, "Helvetica Neue", Helvetica, Arial, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#app {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

:root {
  --swiper-navigation-color: #fff;
  --swiper-pagination-color: #fff;
  --swiper-pagination-bullet-inactive-color: #fff;
}

.swiper {
  width: 100%;
  height: 100%;
}

.swiper-slide-content {
  position: absolute;
  left: 32px;
  bottom: 32px;
  max-width: calc(100% - 64px);
}

.swiper-slide-title {
  font-size: 32px;
  font-weight: bold;
  line-height: 1.25;
  text-shadow: 0px 0px 5px rgba(0, 0, 0, 0.25);
}

.demo-shader-picker {
  position: absolute;
  right: 8px;
  top: 8px;
  z-index: 100;
  cursor: pointer;
}

.demo-shader-selector {
  display: flex;
  align-items: center;
  color: rgb(0, 128, 255);
  background: rgb(40, 40, 40);
  padding: 8px 16px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
}
.demo-shader-selector span {
  color: #fff;
  margin-right: 4px;
}
.demo-shader-selector svg {
  width: 12px;
  height: 12px;
  position: relative;
  top: 1px;
  margin-left: 2px;
}
.demo-shader-selector:hover {
  background: rgb(45, 45, 45);
}

.demo-shader-current {
  font-family: Monaco, Menlo, monospace;
}

.demo-shader-options {
  position: absolute;
  text-align: right;
  right: 8px;
  top: 8px;
  background: rgb(50, 50, 50);
  border-radius: 4px;
  display: none;
  white-space: nowrap;
  line-height: 1;
  font-weight: 500;
  font-size: 14px;
  font-family: Monaco, Menlo, monospace;
}
.demo-shader-options span {
  display: block;
  padding: 8px 16px;
}
.demo-shader-options span + span {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.demo-shader-options span:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #0080ff;
}