main.css

@import url('https://fonts.googleapis.com/css?family=Kaushan+Script');
*,*:before, *:after {
    box-sizing: border-box;
}
body {
    padding: 0;
    margin: 0;
    font-family: 'Kaushan Script', cursive;
}
header {
    margin:0;
}

header h1 {
    background-color: #6B95B0;
    padding: 1em;
    margin:0;
}
header nav {
    display: block;
    float: right;
    border: solid
}

header nav a {
    display: block;
    text-decoration: none;
    padding: 14px 16px;
    float: left;
    color: black;
    font-size: 1em;
    text-align: center;
    font-size: 24px;
}

header nav a:hover {
    background-color: #4C7997;
}

section {
    position: relative;
    margin: 0;
    min-height: 600px;
    display: grid;
    grid-template-columns: 40% 20% 40%;
}
article {
    padding:0 1em;
    margin-top: 0;
    border: solid 1px grey;
    margin: 1em;
}

.centerPic {
    text-align: center;
    padding: 1em;
}
.centerPic img {
    width:90%;
    height: auto;
}
footer {
    background-color: #6B95B0;
    margin: 0;
    padding: 1em;
}