#app {
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  /* background-color: #000000c2; */
  background-color: #e4e7c1;
  background-image: url("data:image/svg+xml,%3Csvg width='80' height='88' viewBox='0 0 80 88' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M22 21.91V26h-2c-9.94 0-18 8.06-18 18 0 9.943 8.058 18 18 18h2v4.09c8.012.722 14.785 5.738 18 12.73 3.212-6.99 9.983-12.008 18-12.73V62h2c9.94 0 18-8.06 18-18 0-9.943-8.058-18-18-18h-2v-4.09c-8.012-.722-14.785-5.738-18-12.73-3.212 6.99-9.983 12.008-18 12.73zM54 58v4.696c-5.574 1.316-10.455 4.428-14 8.69-3.545-4.262-8.426-7.374-14-8.69V58h-5.993C12.27 58 6 51.734 6 44c0-7.732 6.275-14 14.007-14H26v-4.696c5.574-1.316 10.455-4.428 14-8.69 3.545 4.262 8.426 7.374 14 8.69V30h5.993C67.73 30 74 36.266 74 44c0 7.732-6.275 14-14.007 14H54zM42 88c0-9.94 8.06-18 18-18h2v-4.09c8.016-.722 14.787-5.738 18-12.73v7.434c-3.545 4.262-8.426 7.374-14 8.69V74h-5.993C52.275 74 46 80.268 46 88h-4zm-4 0c0-9.943-8.058-18-18-18h-2v-4.09c-8.012-.722-14.785-5.738-18-12.73v7.434c3.545 4.262 8.426 7.374 14 8.69V74h5.993C27.73 74 34 80.266 34 88h4zm4-88c0 9.943 8.058 18 18 18h2v4.09c8.012.722 14.785 5.738 18 12.73v-7.434c-3.545-4.262-8.426-7.374-14-8.69V14h-5.993C52.27 14 46 7.734 46 0h-4zM0 34.82c3.213-6.992 9.984-12.008 18-12.73V18h2c9.94 0 18-8.06 18-18h-4c0 7.732-6.275 14-14.007 14H14v4.696c-5.574 1.316-10.455 4.428-14 8.69v7.433z' fill='%23fbfbfb' fill-opacity='0.4' fill-rule='evenodd'/%3E%3C/svg%3E");
}

.loading-menu {
  position: fixed;
  width: 100%;
  height: 100vh;
  background-color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  cursor: pointer;
}

.loading-menu>img {
  max-width: 60%;
  animation: pulse; /* referring directly to the animation's @keyframe declaration */
  animation-duration: 2s; /* don't forget to set a duration! */
  animation-iteration-count: infinite;
}

.book {
  position: relative;
}

.book-inner {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.stage-block {
  flex: 0 0 auto;
  position: relative;
  width: 100%;
  padding-top: 56.2%;
  overflow: hidden;
}

.stage {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
}

.stage-tools {
  position: absolute;
  bottom: 10px;
  right: 0;
  padding: 5px;
  background-color: #e4e7c1;
  /* box-shadow: inset 0 0 2px 0px #0007; */
  transition: transform .4s ease;
  transform: translate(100%, 0);
}

.stage-tools.active {
  transform: translate(0, 0);
}

.stage-tools-switch{
  position: absolute;
  top: 0;
  left: 0;
  transform: translate(-100%, 0);
  background-color: #e4e7c1;
  border: none;
  border-bottom-right-radius: 0;
  border-top-right-radius: 0;
  border-top-left-radius: 50%;
  border-bottom-left-radius: 50%;
  height: 100%;
  padding-right: .3em;
}

.stage-tools-switch:focus{
  outline: none;
  box-shadow: none;
}

.stage .main-bg {
  max-width: 100%;
}

.subtitle-block {
  flex: 1 0;
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 10px;
  background-color: #dbd294;
}

.subtitle-tools {
  flex: 0 0 auto;
  padding-bottom: 10px;
}

.subtitle {
  flex: 1 0;
  width: 100%;
  background-color: #ece9cb;
}

.subtitle-slider {
  width: 100%;
  height: 100%;
}

.subtitle-content {
  width: 100%;
  height: 100%;
  padding: 10px 15px;
  font-size: 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.subtitle-content p{
  margin-bottom: .2em;
  letter-spacing: 1px;
}

.subtitle-content h4{
  text-align: center;
  font-size: 1.3em;
}

.subtitle .duo-subtitle1 {
}

.subtitle.active .duo-subtitle1 {
  display: none;
}

.subtitle .duo-subtitle2 {
  display: none;
}

.subtitle.active .duo-subtitle2 {
  display: block;
}