body {
    padding: 10px;
    margin: 0px;
    font-family: Arial, Helvetica, sans-serif;
    background-color: #d4d3d3;
}

header {
    margin-top: 80px;
    margin-bottom: 5px;
    
}
.mitte {
  
    display: flex;
    justify-content: center;
    align-items: center;
    
}



#tesser {
    width:100%;
    height: 300px;
    
}
#tesser img {
    padding-top: 10px;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50px;
}
@media screen and (min-width: 800px) {
    #tesser {
        height: 600px;
    }
    .mitte {
        display: flex;
        justify-content: center;
        align-items: center;
    
    }
#tesser1 {
    width:100%;
    height:300px;
    border-radius: 50px;
 
    
}
#tesser1 img {
    width: auto;
    height: auto;
    object-fit: cover;
    border-radius: 50px;
  
}
@media screen and (min-width: 800px) {
    #tesser1 {
        height: 600px;
        
    }
}
#tesser2 {
    width:100%;
    height:300px;
}
#tesser2 img {
    width: 25%;
    height: 25%;
    object-fit: cover;
    border-radius: 50px;
  
}
@media screen and (min-width: 800px) {
    #tesser2 {
        height: 600px;
    }
    #tesser3 img {
        width: 25%;
        height: 25%;
        object-fit: cover;
        border-radius: 50px;
      
    }
    

nav {
    position: sticky;
    top: 0px;
    backdrop-filter: blur(10px);
}

footer ul, nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    padding-top: 24px;
    padding-bottom: 24px;
}
footer ul li a, nav ul li a {
    font-weight: bold;
    padding: 16px;
   
 
}
section {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 16px;
    padding-right: 16px;
}

.demo-list-radio {
    display: inline;
  }
      .page-content {
          padding: 50px 200px;
      }
      div.textbox {
        padding: 10px 10px 10px 10px;
        width: 77%;
        border: 10px solid rgb(28, 116, 14);
        box-shadow: 20px 20px 20px; rgba(0,0,0,08);