#mainNav {
    background-color: #303337;
}

#about {
    margin: 100px;
}

@media (max-width: 768px) {
    .text-center {
        width: 400px;
        margin-left: -100px;
    }

    .timeline {
        width: 410px;
        margin-left: -100px;
    }
}