.navbar {
    z-index: 2;
}

.jumbotron {
    background-image: url(img/jumbotron_background.png);
    background-size: cover;
    height: 840px;
    position: relative;
}

.jumbotron .container {
    margin-top: 300px;
    position: relative;
    z-index: 1;
    color: white;
}

.jumbotron::after {
    content: '';
    display: block;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.2);
    position: absolute;
    bottom: 0px;
}

section {
    padding: 24px;
}

#section-overview {
    margin-top: -30px;
    background-color: aliceblue;
}

#section_footer {
    background-color: green;
}

#section_portfolio {
    background-color: white;
}