.graph-lien-externe {    
    display: flex;
    justify-content: center;
}

.graph-lien-externe a {   
    display: flex;
    justify-content: center;
    align-items: center; 
    color: #404040;
    font-size: 20px;
    line-height: 1;
    text-transform: uppercase;
}

.graph-lien-externe a i {    
    color: #ee2e24;
    padding-left: 15px;    
    font-size: 40px;

    transition: padding 0.35s;
}

.graph-lien-externe a:hover i {
    padding-left: 25px;    
}