@import url("https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap");

header {
  background:#333;
  color:red;
  padding:16px;
  font-family: sans-serif;
}

.main-header {
  position: relative;
  padding: 40px;
  text-align: center;
  z-index: 1;
}

.main-header::before {
  content: "";
  position: absolute;
  background: #000;
  border-radius: 8px;
  z-index: -1;
  margin: 0 10%;
  box-shadow: 0 0 20px rgba(0,0,0,.5);

}

.main-header nav a { color:#fff; }

body {
  background-color: #303030;
  background-image: url("/bg2.gif");
  background-size: cover;
}

header h1 {
  margin:0;
  font-size:24px;
}

header nav a {
  color:red;
  margin-right:8px;
  text-decoration:none;
}

header nav a:hover {
  text-decoration:underline;
}