#wrapper {
  background-position: 50% 174px;
}
.main-visual {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  min-width: 940px;
  margin: auto;
}
.main-visual::before {
  content: "";
  display: block;
  padding-top:  56.25%;
}
.main-visual > iframe {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  border: 0;
  aspect-ratio: 560 / 315;
  pointer-events: none;
  user-select: none;
}
.main-visual-detail {
  position: absolute;
  bottom: 0;
  left: 0;
  z-index: 2;
  padding: 10px 20px;
}
.main-visual-detail a {
  display: inline-block;
  font-size: 24px;
  font-weight: bold;
  color: #fff;
  text-shadow: 0 0 8px #222;
}
.main-visual-detail a:hover {
  text-decoration: none;
  opacity: 0.6;
}

.main-visual-detail-icon {
  display: inline-block;
  width: 1em;
  height: 1em;
  margin-top: -4px;
  margin-left: 10px;
  vertical-align: middle;
  background: transparent url("/assets/images/icon/icon-angles-right.svg") 0 0 no-repeat;
  background-size: contain;
  filter: drop-shadow(0 0 8px #222);
}

.main-visual-thumbnail-img {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 3;
  width: 100%;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  pointer-events: none;
  user-select: none;
}

@-webkit-keyframes fadeOut {
  from {
    opacity: 1
  }

  to {
    opacity: 0
  }
}
.is-youtube-start .main-visual-thumbnail-img {
  animation-name: fadeOut;
  animation-duration: 1s;
  animation-fill-mode: both;
}


/**
 * 音量ON・OFFボタン
 */
.mute-control-button {
  position: absolute;
  right: 20px;
  bottom: 20px;
  z-index: 2;
  display: block;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 0;
  text-align: center;
  cursor: pointer;
}
.mute-control-button:hover {
  opacity: 0.7;
}
.mute-control-button-icon {
  display: block;
  width: 50px;
  height: 50px;
  margin: 0 auto;
  background-color: #fff;
  background-position: center center;
  background-repeat: no-repeat;
  background-size: 32px;
  border-radius: 50%;
  box-shadow: 0 0 6px #666;
}
.mute-control-button-text {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}
.mute-control-button[aria-pressed="true"] .mute-control-button-icon {
  background-image: url("/assets/images/icon/icon-volume-xmark.svg");
}
.mute-control-button[aria-pressed="false"] .mute-control-button-icon {
  background-image: url("/assets/images/icon/icon-volume-high.svg");
}