.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: #0f0f11;
  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;
}

body.light {
  background: #fff;
}

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

.demo-nav {
  width: 100%;
  height: 48px;
  flex-shrink: 0;
  background: #222;
  display: flex;
  justify-content: center;
  align-items: stretch;
  color: #fff;
  gap: 8px;
  box-sizing: border-box;
  padding: 8px 16px;
  z-index: 10;
  font-family: monospace;
  font-size: 12px;
}

/* ボタン・ラベル共通 */
.demo-nav button,
.demo-nav label {
  padding: 0 8px;
  border-radius: 32px;
  height: 100%;
  font-size: 12px;
  font-family: monospace;
  appearance: none;
  font-weight: 600;
  text-transform: uppercase;
  margin: 0;
  border: 1px solid rgba(255, 255, 255, 0.2);
  outline: 0;
  box-shadow: none;
  background-color: transparent;
  color: #fff;
  transition: background-color .1s, border-color .1s;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* Active */
.demo-nav button.active,
.demo-nav label.active {
  background: #114df1;
  border-color: rgba(255, 255, 255, 0.2);
}

/* Hover */
.demo-nav button:not(.active):hover,
.demo-nav label:not(.active):hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* 左右切替 */
.demo-nav-segmented {
  display: flex;
  align-items: center;
}

.demo-nav-segmented button {
  width: 96px;
  padding: 0;
}

.demo-nav-segmented button:first-child {
  border-radius: 32px 0 0 32px;
  border-right: none;
}

.demo-nav-segmented button:nth-child(2) {
  border-radius: 0 32px 32px 0;
}

/* label内のinput */
.demo-nav label input {
  display: none;
}

:root {
  --expo-image-border-radius: 16px;
}
@media (min-width: 768px) {
  :root {
    --expo-image-border-radius: 32px;
  }
}
.swiper {
  max-width: 100%;
}
.swiper-horizontal {
  width: 100%;
  aspect-ratio: 16 / 9;
  margin: auto 0;
}
.swiper-vertical {
  height: 100%;
  aspect-ratio: 9 / 16;
}
.expo-content {
  padding: 16px;
  font-weight: bold;
  line-height: 1.1;
  text-wrap-style: balance;
  display: flex;
  align-items: flex-end;
  box-sizing: border-box;
  color: #fff;
  font-size: 5.6vw;
  visibility: hidden;
}

/* コンテンツ表示 */
body.content-visible .expo-content {
  visibility: visible;
}

/* タブレット・PC */
@media (min-width: 640px) {
  .expo-content {
    padding: 32px;
  }
}

/* 縦スライダー時 */
.swiper-vertical .expo-content {
  font-size: 4.5vh;
}