body {
  background-color: #EEEEEE;
  font: Helvetica, sans-serif;
  width: 90%;
  margin: auto;
}

  #logo, #menu {   
    background-color: lightblue;
    height: 100px;
    width: 50%;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  #logo {
    float: left;
  }

  #menu {
    float: right;
  }
  
  #baner {
    background-color: #DDDDDD;
    height: 200px;
    clear: both;
  }

  #glowny {
    color: navy;
    margin: 50px;
    height: 400px;
  }

  #stopka {
    text-align: right;
    background-color: lightblue;
    padding: 10px;
  }

  button {
    background-color: lightblue;
    color: navy;
  }
  
  a {
    color: navy;
    size: 150%;
    font-weight: bold;
    text-decoration: none;
    margin: 10px;
    padding: 5px;
  }

  a:hover {
    border: solid 1px navy;
  }