html, body {
    background-color: #515f6c;
}

.container {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: url(/images/latte-1200x1200.jpg);
    background-position: top;
    background-size: cover;
    background-repeat: no-repeat;
}

.container > a {
    display: block;
    padding: 10px;
}

img {
    width: 100%;
    height: auto;
    max-width: 591px;
    min-width: 375px;
    vertical-align: top;
}