ul.list-devices li{ 
     display:block; 
     padding:10px 5px 10px 5px ;
     background:white; 
     width:600px; 
     min-height:150px;
     border: 1px solid black;
     border-radius: 21px ;
}


h3.title-list-device { 
  color:white;
} 

p.not-device-list {
   color:white;
}