puzzle.css

body {
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #333;
    padding:3vw;
     
}
#game{
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;   
    justify-content: center;
    padding: 1vw;
    height: 80vh;
    width: 90%;
    border-radius: 0.5vw;
    background-color:  #a491b5b0;
    
}
#board {
    width: 322px;
    height: 271px;
    margin-bottom:5vh;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;   
    align-items: center;     
}

#board img {
    width: 100px;
    height: 100px;
    border: 0.5px solid rgba(27, 28, 28, 0.783);
    margin-bottom: 0 auto;
}


#pieces {
    width: 825px;
    height: 91px;
    border: 2px solid rgba(34, 32, 34, 0.881);
    margin-top: 5vh;
    display: flex;
    flex-wrap: wrap;
}

#pieces img {
    width: 90px;
    height: 90px;
  
    border: 0.5px solid rgba(8, 8, 8, 0.848);
}
input[type="submit"]{
    padding: 15px;
    border:3px solid rgba(56, 121, 56, 0.87);
    border-radius: 10px;
    background-color: rgba(255, 255, 255, 0.705);
    font-size: 1em;  
} 
input[type="submit"]:hover{
    background-color: rgba(56, 121, 56, 0.87);
    color: whitesmoke;
    cursor:pointer;
}
#tick{
    height: 70px;
    width: 70px;

}
.popup,.popup2{
    width: 400px;
    background: #f8f0fae9;
    border-radius: 6px;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%,50%) scale(0.1);
    text-align: center;
    padding: 0 30px 30px;
    color: #333;
    visibility: hidden;
    transition: transform 0.4s,top 0.4s;
}

.popup_opened,.popup_opened2{
    visibility: visible;
    top: 50px;
    transform: translate(-50%,50%) scale(1);

}
.popup img,.popup2 img{
    
    width: 100px;
    margin-top: -50px;
    border-radius: 50%;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);

}
.popup h2,.popup2 h2{
    font-size:38px;
    font-weight: 500;
    margin: 30px 0 10px;

}
.popup button,.popup2 button{
    width: 100%;
    margin-top: 3vh;
    padding: 10px 0;
    background: #1fa251;
    color: #ffff;
    border: 0;
    outline: none;
    font-size: 18px;
    border-radius: 4px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    
}
.popup2 button {
   
    background: #a22626;
    
}
@media screen and (max-width:990px){
    #pieces {
        width: 555px;
        height: 61px;     
    }
    #pieces img {
        width: 60px;
        height: 60px;    
    }
}
@media screen and (max-width:650px){
    #pieces {
        width: 246px;
        height: 130px;
        overflow:auto;   
    }
    #pieces img {
        width: 60px;
        height: 60px;  
    }
    #board {
        width: 300px;
        height: 200px;        
    }
    #board img {
        width: 81px;
        height: 81px;
    }
}