.flip-book {
  box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.5);
  display: none;
  background-size: cover;
}

.page {
  padding: 20px;

  background-color: hsl(35, 55, 98);
  color: hsl(35, 35, 35);
  border: solid 1px hsl(35, 20, 70);

  overflow: hidden;

  .page-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: stretch;

    .page-header {
      height: 30px;
      font-size: 100%;
      text-transform: uppercase;
      text-align: center;
    }

    .page-image {
      height: 100%;
      background-size: contain;
      background-position: center center;
      background-repeat: no-repeat;
    }

    .page-text {
      height: 100%;
      flex-grow: 1;
      font-size: 80%;
      text-align: justify;
      margin-top: 10px;
      padding-top: 10px;
      box-sizing: border-box;
      border-top: solid 1px hsl(35, 55, 90);
    }

    .page-footer {
      height: 30px;
      border-top: solid 1px hsl(35, 55, 90);
      font-size: 80%;
      color: hsl(35, 20, 50);
    }
  }

  &.--left { // for left page (property will be added automatically)
    border-right: 0;
    box-shadow: inset -7px 0 30px -7px rgba(0, 0, 0, 0.4);
  }

  &.--right { // for right page (property will be added automatically)
    border-left: 0;
    box-shadow: inset 7px 0 30px -7px rgba(0, 0, 0, 0.4);

    .page-footer {
      text-align: right;
    }
  }

  &.hard { // for hard page
    background-color: hsl(35, 50, 90);
    border: solid 1px hsl(35, 20, 50);
  }

  &.page-cover {
    background-color: hsl(35, 45, 80);
    color:  hsl(35, 35, 35);
    border: solid 1px hsl(35, 20, 50);

    h2 {
      text-align: center;
      padding-top: 50%;
      font-size: 210%;
    }

    &.page-cover-top {
      box-shadow: inset 0px 0 30px 0px rgba(36, 10, 3, 0.5), -2px 0 5px 2px rgba(0, 0, 0, 0.4);
    }

    &.page-cover-bottom {
      box-shadow: inset 0px 0 30px 0px rgba(36, 10, 3, 0.5), 10px 0 8px 0px rgba(0, 0, 0, 0.4);
    }
  }
}