.book-video__controls {
  position: relative;
  z-index: 5;
  display: none;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 9px;
}

.book-video__stage.is-open.has-video .book-video__controls {
  display: flex;
}

.book-video__controls .book-video__sound,
.book-video__speed {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 38px;
  padding: 8px 13px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 999px;
  background: rgba(25, 32, 31, 0.78);
  box-shadow: 0 7px 18px rgba(0, 0, 0, 0.16);
  color: #fff;
  cursor: pointer;
  font-family: 'Noto Sans JP', sans-serif;
  line-height: 1;
  backdrop-filter: blur(5px);
}

.book-video__speed span {
  font-size: 16px;
  line-height: 1;
}

.book-video__speed b {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.book-video__speed[data-speed="1.5"],
.book-video__speed[data-speed="2"] {
  border-color: rgba(128, 204, 188, 0.92);
  background: #4f8e83;
}

@media (max-width: 600px) {
  .book-video__controls {
    gap: 7px;
  }

  .book-video__controls .book-video__sound,
  .book-video__speed {
    min-height: 34px;
    padding: 7px 10px;
  }

  .book-video__speed b {
    font-size: 9px;
  }
}