y-icon {
    opacity: 0;
}
.dfn-panel .link-item:hover .copy-icon,
.dfn-panel .link-item .copy-icon:focus {
    opacity: 1;
}

.dfn-panel .copy-icon {
    display: inline-block;
    margin-right: 0.5em;
    width: 0.85em;
    height: 1em;
    border-radius: 3px;
    background-color: #ccc;
    cursor: pointer;
}

.dfn-panel .copy-icon .icon {
    width: 100%;
    height: 100%;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.dfn