html,
body,
figure {
    margin: 0;
    padding: 0;
}

img {
    width: 100%;
    height: auto;
}

.demo-selector-form {
    position: absolute;
    top: 1em;
    left: 0;
    right: 0;
    text-align: center;
}

.header {
    max-width: 1400px;
    margin: auto;
}

.content {
    margin: auto;
    padding: 3em 1em 1em;
}

@media (min-width: 660px) {
    .content {
        width: 640px;
    }
}

@media (min-width: 1020px) {
    .content {
        width: 1000px;
    }
}

@media (min-width: 1220px) {
    .content {
        width: 1200px;
    }
}