body {
    color: #373737;
    background-color: #e2e2e2;
    margin: 0;
    font-family: ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
}
header {
    border-top: 2px solid #bbb;
}
main {
    background-color: white;
    margin: 40px auto;
    max-width: 800px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
article {
    padding: 20px 40px;
    line-height: 1.5;
}
h1, p {
    font-weight: 200;
}
header img {
    max-width: 100%;
    height: auto;
}
footer {
    background-color: #f9f9f9;
    border-top: 1px solid #ddd;
    text-align: center;
    padding: 20px 40px;
}
footer img {
    display: inline-block;
}

@media (max-width: 768px) {
	body {
		background-color: #f9f9f9;
	}
    main {
        box-shadow: none;
        margin: 0;
    }
}