* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
html,
body {
  height: 100%;
  background-color: #192337;
}

#header {
  background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
    url("../assets/header.jpg");
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}