<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8"/>
<title>Название потом придумаю!</title>
<link rel="stylesheet" type="text/css" href="style.css"/>
</head>
<body>
<header>
<div class="container">
dddd
</div>
</header>
<section>
<div class="container">
</div>
</section>
<section>
<div class="container">
</div>
</section>
<section>
<div class="container">
</div>
</section>
<footer>
<div class="container">
</div>
</footer>
</body>
</hnml>header {
background: url(../img/first-bg.jpg) no-repeat center top / cover;
height: 100vh;
}
<spoiler title=""> </head></spoiler>href="style.css"../img/first-bg.jpg
header { height: 100vh; }<b></b>
Простой
