.navbar {
    list-style-type: none;
    margin: auto;
    padding: 15px;
    overflow: hidden;
    background-color: rgb(0, 96, 173);
    font-family: 'Ubuntu', sans-serif;
    font-size: 25px;
  }
  
  .item {
    float: left;
  }
  
  .item a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
  }
  
  .item a:hover {
    background-color: red;
    color: white;
  }

  @media screen and (max-width:768px) {

    .item {
        float: none;
    }

    .item a{
        display:block;
        padding: 15px;
        text-decoration: none;
        color: white;
    }
    
    .item a:hover {
        background-color: red;
        color: white;
    }
      
}

body{
    background-image: url(https://png.pngtree.com/background/20210715/original/pngtree-red-line-striped-road-retro-background-picture-image_1306727.jpg);
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

div{
  padding: 20px;
}

img{
    margin-left: auto;
    margin-right: auto;
    display: block;
}

.marioobrazek{
  margin-left: auto;
  margin-right: auto;
  display: block;
  max-width: 100%;
  height: auto;
}

h1{
    color: white;
    font-family: 'Ubuntu', sans-serif;
    text-align: center;
    font-size: 72px;
  }

  h2{
    text-decoration: solid underline;
    font-family: 'Ubuntu', sans-serif;
    color: white;
    font-size: 36px;
  }

  ul{
    font-family: 'Ubuntu', sans-serif;
    font-size: 25px;
    list-style-type: square;
    color: white;
  }

  p{
    color: white;
    font-family: 'Ubuntu', sans-serif;
    font-size: 25px;
  }