.markdown-body .ydoc-example {
  position: relative;
  overflow: hidden;
}
.ui-copy {
    position: absolute;
    right: 0;
    top: -1px;
    text-align: center;
    line-height: 15px;
    height: 15px;
    padding: 8px 10px 0;
    cursor: pointer;
    user-select: none;
    transition: all .2s;
    font-weight: bold;
    color: #ccc;
}
.ui-copy:hover {
    color: #999;
}
.copy-tip {
    display: none;
    color: #fff;
    padding: 4px;
    border-radius: 4px;
    position: absolute;
    right: 0px;
    top: 27px;
    background-color: rgba(0, 0, 0, .85);
}
.copy-tip:after {
    content: '';
    display: block;
    position: absolute;
    right: 20px;
    top: -8px;
    transform: translateX(50%);
    width: 0;
    height: 0;
    border: 4px solid transparent;
    border-bottom-color: rgba(0, 0, 0, .85);
}