html { font-size: 62.5%; } body { font-size: 1.6rem; line-height: 1.6; font-family: 'Source Sans Pro', sans-serif; background-color: rgb(250, 250, 250); } h1 { font-size: 3rem; margin-bottom: 30px; } a { text-decoration: underline; color: inherit; } p { display: block; margin-bottom: 15px; } img { width: 100%; } img[src=""] { display: none; } code, pre { font-family: 'Source Code Pro', monospace; } .container { width: 90%; max-width: 600px; margin: 50px auto; }