body {
    font-family: sans-serif;
    background-color: #111;
    background-image: url(background.jpg);
    background-position: center top;
    background-repeat: no-repeat;
    color: #ecc;
    line-height: 1.3;
}

p {
    margin: 0.5em 0;
}

a:link, a:visited {
    color: #f79;
}

main {
    max-width: 50rem;
    margin: 5rem auto 0;
    background-color: rgba(55, 55, 55, 0.5);
}

main>header:before {
    width: 100%;
    height: 2px;
    display: block;
    content: "";
    opacity: 0.7;
    background: linear-gradient(to right, #111, #e849c3);
}

main>header>div {
    width: 50%;
    margin: 3rem 10% 2rem;
    text-align: center;
}

main>section {
    margin: 1rem;
}

main>footer {
    clear: both;
    background: #111;
    height: 4px;
}

.wallrunner {
    width: 25%;
    float: right;
    margin: 6rem 1rem 0 0;
}

.logo {
    width: 100%;
}

.download-link {
    padding: 0.5rem;
    background: #111;
    border: 1px solid #f79;
    display: inline-block;
    margin: 0.5rem 20% 0.5rem;
}

.video {
    width: 100%;
    vertical-align: top;
}

dl.qa dt {
    font-weight: bold;
    margin: 1rem 0 0.2rem;
}
dl.qa dd {
    margin: 0;
}

.heart {
    width: 2em;
}

.screenshot {
    text-align: center;
    background-color: #00000033;
}
.screenshot img {
    width: 20em;
    max-width: 100%;
    border: 4px solid #00000033;
    vertical-align: middle;
    margin: 0.2em;
}