body {
  background-image: url('wallpaper.jpg');
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
  max-width: 800px;
  margin: auto;
}

h1 {
  color: white;
  text-align: center;
}

.header {
  display: flex;
  margin: 0 auto;
  padding: 1%;
}

/*Logo*/
#logo {
  float: left;
  width: 110px;
  padding-left: 40px;
}

/*Menu*/

.menu {
  display: inline-block;
  
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

ul li {
  float: left;
}

ul li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

ul li a:hover {
  background-color: #111111;
}

/*main*/
section {
  background-color: #659d70;
  padding: 1%;
  float: none;
}