#introduction .content {
    flex: 5;
    width: 25%;
}

#introduction footer {
    flex : 1;
    transition: transform 0.5s ease-in-out;
}

footer:hover{
    transform: translateY(-20px);
}

hr {
    width: 100%;
}

.typer::after {
    content: '|';
    animation: blink 800ms infinite;
}

@keyframes blink {
    from { opacity: 0; }
    to { opacity: 1; }
}