vuepress-playground/src/style.less

vuepress demo box

.vuepress-playground-code-box {
  height: 0;
  padding: 0 !important;
  overflow: hidden;
  background-color: #282c34;
  border-radius: 0 !important;
  transition: height .5s;

  pre {
    margin: 0 !important;
  }
}
.vuepress-playground-wrapper {
  border: 1px solid #ebebeb;
  border-radius: 4px;
  transition: all .2s;
  margin-top: 10px;

  &:hover {
    box-shadow: 0 0 11px rgba(33,33,33,.2); 
  }

  .vuepress-playground-display-box {
    padding: 20px;
    border-bottom: 1px solid #ebebeb;
  }

  .vuepress-playground-control-box {
    text-align: center;
    padding: 10px 0;
    position: relative;

    form:nth-last-child(2) {
      right: 80px;
    }

    form:last-child {
      right: 10px;
    }

    .vuepress-playground-jsfiddle,
    .vuepress-playground-codepen {
      position: absolute;
      top: 10px;
      opacity: 0;
      transform: translateX(10px);
      transition: all .5s;
    }

    .vuepress-playground-expand-btn {
      position: relative;
      transform: translateX(24px);
      transition: all .5s;
      
      &::before {
        content: '';
        position: absolute;
        left: -10px;
        top: 9px;
        width: 0;
        height: 0;
        border-top: 6px solid #ccc;
        border-left: 6px solid transparent;
        border-right: 6px solid transparent;
      }
      
      span {
        opacity: 0;
        transition: all .5s;
      }
    }

    .vuepress-playground-btn-text {
      border-color: transparent;
      background-color: transparent;
      font-size: 14px;
      color: #3eaf7c;
      cursor: pointer;
      outline: none;
      margin: 0;
    }

    &:hover {
      .vuepress-playground-jsfiddle,
      .vuepress-playground-codepen,
      .vuepress-playground-expand-btn span,
      .vuepress-playground-expand-btn {
        opacity: 1;
        transform: translateX(0);
      }

      .vuepress-playground-expand-btn::before {
        border-top-color: #3eaf7c;
        border-bottom-color: #3eaf7c;
      }
    }

    &.vuepress-playground-control-box-show-link {
      .vuepress-playground-jsfiddle,
      .vuepress-playground-codepen {
        opacity: 1;
        transform: translateX(0);
      }

      .vuepress-playground-expand-btn::before {
        border-bottom: 6px solid #ccc;
        border-left: 6px solid transparent;
        border-right: 6px solid transparent;
        border-top: none;
      }
    }
  }
}