.container {
    max-width: 1000px;
    width: 100%;
    margin: 0 auto;
    position: relative;
    height: 500px;
    text-align: center;
}
.col-md-12 {
    width: 100%;
}
.vertical-center {
    margin: 0;
    position: absolute;
    top: 50%;
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
}
h1 {
    font-size: 6rem;
}
@media (max-width: 850px) {
    h1 {
        font-size: 4rem;
    }
}