html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}
.notification-icon {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: #000;
    display: inline-block;
    margin-right: 8px;
    vertical-align: middle;
}