I started working in html and css and I have an issue. I have the header and it has some space between the browser and the header itself I hope you understand what I am saying. It is just a rectangle on a background.
body{
background-image:url(bg.jpg);
background-size: 100%;
background-repeat: no-repeat;
}
header{
background-color:#000;
padding: top;
min-height: 70px;
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>PaginaWeb</title>
<script src="External_Java.js"></script>
<link rel="stylesheet" type="text/css" href="Style.css">
</head>
<body>
<header>
<nav>
<p>text</p>
</nav>
</header>
</body>
</html>