* {
    font-family: 'Barlow', Helvetica, Arial, sans-serif;
}

header, section, aside, footer {
    box-sizing: border-box;
}

header {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    background-image: url(media/ada_banner.jpeg);
    background-size: cover;
    padding: 3em;
    font-size: 1em;
}

section {
    float: left;
    width: 75%;
    padding: 1em;
    margin-top: 250px;
}

aside {
    float: left;
    width: 25%;
    padding: 1em;
    position: fixed;
    right: 0;
    margin-top: 250px;
}

footer {
    clear: both;
    padding-left: 16px;
}

h2 {
    font-size: 1.6em;
    font-weight: 700;
}

p {
    font-size: 1.3em; 
}

a {
    color: black;
}

aside img {
    width: 100%;
    padding-top: 1em;
}

.testimonials {
    display: inline-flex;
    flex-flow: row;
    justify-content: space-between;
}

.testimonials a {
    width: 33%;
}

.testimonials figure {
    margin: 10px 10px;
}

.testimonials img {
    width: 100%;
    border-radius: 50%;
}

.testimonials figcaption {
    text-align: center;
}