.slide_back {
  padding-top: 0;
}

.close-button {
  display: inline-block;
  font-size: 16px;
  font-weight: bold;
  border-radius: 15px;
  color: #fff;
  border: 2px solid #fff;
  line-height: 1;
  background-color: transparent;
  padding: 5px 15px;
  margin-right: 30px;
}

.close-button:hover {
  opacity: 0.6;
}

.slide-state-fullscreen #main-slide {
  width: 100%;
}

.fullscreen-wrapper.slide-state-fullscreen {
  overflow: hidden;
}

.main-content {
  width: 100%;
  height: auto;
}

#main-slide {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}

.slide-controller {
  position: absolute;
  bottom: 5px;
  right: 0;
  display: block;
}

/* 最小アスペクト比 */
@media (min-aspect-ratio: 16/9) {
  .main-content {
    width: 177vh;
    height: 100vh;
  }
}

/* 最大アスペクト比 */
@media (max-aspect-ratio: 16/9) {
  .main-content {
    width: 100vw;
    height: 56.25vw;
  }

  #main-slide {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
  }
}

@media (aspect-ratio: 1/1) {
  .main-content {
    width: 100vw;
    height: 100vh;
  }
}