body {
  background-image: url(pozad_hlavni.png);
  background-size: cover; 
  background-position: center; 
  background-repeat: no-repeat; 
  background-attachment: fixed;
}

ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: rgb(230, 46, 46);
  }

  li {
    float: left;
    font-weight: bold;
    font-size: x-large;
  }

  li a {
    display: block;
    color: rgb(0, 0, 0);
    padding: 16px;
    text-decoration: none;
  }

  li a:hover {
    background-color: rgb(236, 90, 46);
  }

ol {
  list-style-type: none;
  overflow: hidden;
  margin: 3%;
  padding: 0;
  width: 20%;
}

ol li {
  display: contents;
  color: rgb(0, 0, 0);
  text-align: left;
  padding: 16px;
  text-decoration: none;
  float: left;
  font-weight: bold;
  font-size: x-large;
  
}

ol li a:hover {
  background-color: rgb(0, 225, 255);
}