.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;
  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%;
  height: 100dvh;
  display: flex;
  box-sizing: border-box;
  flex-direction: column;
}

.demo-nav {
  height: 48px;
  background: #222;
  display: flex;
  justify-content: center;
  align-items: stretch;
  font-family: monospace;
  color: #fff;
  gap: 16px;
  box-sizing: border-box;
  padding: 6px 16px;
  z-index: 10;
}

.demo-nav {
  font-size: 12px;
}
.demo-nav label {
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0px 8px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: relative;
  cursor: pointer;
}
.demo-nav label:hover {
  background: rgba(0, 0, 0, 0.1);
}
.demo-nav .dropdown {
  position: absolute;
  background: #111;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  right: 4px;
  top: 4px;
  width: 64px;
  overflow: hidden;
}
.demo-nav .dropdown:not(.visible) {
  display: none;
}
.demo-nav .dropdown span {
  display: block;
  cursor: pointer;
  text-align: right;
  padding: 4px 8px;
  cursor: pointer;
}
.demo-nav .dropdown span:hover {
  background: rgba(255, 255, 255, 0.05);
}

.demo-slider {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 10;
  min-height: 0;
}

.swiper-material {
  height: 300px;
  width: calc(100% - 32px);
  max-width: 800px;
}

.demo-material-image {
  position: absolute;
  left: 0%;
  top: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: var(--swiper-material-slide-border-radius);
}

.demo-material-label {
  position: absolute;
  font-size: 24px;
  color: #fff;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 50%;
  box-sizing: border-box;
  padding: 24px;
  display: flex;
  flex-direction: column;
  font-weight: 500;
  justify-content: flex-end;
  align-items: center;
  white-space: nowrap;
  text-shadow: 0px 0px 5px rgba(0, 0, 0, 0.25);
  background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.2) 50%);
}