Сергей Ст

html {
		position: relative;
		min-height: 100vh;
	}
	body {
		margin-bottom: 4em;
	}
	.footer {
		bottom: 0;
		left: 0;
		width: 100%;
		height: 4em;
		line-height: 4em;
		position: absolute;
		background-color: #ccc;
	}