.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: #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;
  box-sizing: border-box;
}

@media (min-width: 480px) and (min-height: 480px) {
  body {
    background: #121212;
  }
  #app {
    width: 412px;
    margin: 16px auto;
    background: #fff;
    border: 16px solid #000;
    height: 768px;
    border-radius: 32px;
    box-shadow: 0px 0px 0px 1px rgba(255, 255, 255, 0.2);
  }
}
.swiper-tinder {
  padding: 16px;
  width: 100%;
  height: 100%;
}

.swiper-slide {
  border-radius: 16px;
}
.swiper-slide::before {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 50%;
  pointer-events: none;
  content: "";
  background-image: linear-gradient(to top, rgba(0, 0, 0, 0.95) 25%, rgba(0, 0, 0, 0));
  z-index: 10;
}

.demo-slide-name {
  padding: 16px 16px 96px;
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  box-sizing: border-box;
  color: #fff;
  z-index: 200;
  font-size: 24px;
}

.demo-empty-slide {
  background: #ccc;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  line-height: 1.5;
  text-align: center;
  font-weight: bold;
  color: #555;
  text-shadow: 0px 1px 0px #fff;
}
.demo-empty-slide::before {
  display: none;
}