body {
    background-color: rgb(31, 31, 31);
    text-align: center;
    color: aliceblue;
    font-family:'Verdana, Geneva, Tahoma, sans-serif'
    
}


#border {
    display: flex;
    flex-wrap: wrap;
    width: 650px;
    margin: auto;
}

.cards {
    border: 3px solid black;
    width: 110px;
    height: 120px;
    margin: 7px;
   font-size: 60px; 
   box-shadow: 0 2px 10px rgba(0,0,0,0.3); 
   border-radius: 10px;
   cursor: pointer;
}

.hidden {
    
    color: transparent;
    background-color: rgb(31, 31, 31);
    
}

.correct {
    background-color: rgba(111, 125, 124, 0.544);
}

#restart {
    width: 100px;
    height: 40px;
    border-radius: 10px;
    margin: 7px;
    font-size: 20px;
    background-color: rgb(80, 80, 80);
    border: rgb(31, 31, 31);
     color: aliceblue;
     font-family:Verdana, Geneva, Tahoma, sans-serif
}

.modal{
 display: none;
} 

 .modal.show {
  display: block;
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: rgb(31, 31, 31);
  padding: 20px;
  border-radius: 6px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
  text-align: center;
}