.external-icon {
    display: inline-block;
    margin-left: 0.25em;
    vertical-align: -0.25em;

    width: 1.2em;
    height: 1.2em;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}