body{
    background-color: cadetblue;
}

.start{
    margin: 200px 650px;
}

div a button{
    box-shadow: 0px 5px 15px rgb(196, 75, 75) inset;
    color: #2600ff;
    cursor: pointer;
    border-radius: 20px;
    padding: 20px 20px;
    font-size: larger;
    background-color: rgb(152, 180, 204);
    border-style: none;
}
h2{
    margin: 0;
    text-align: center;
}

#timer{
    margin-bottom: 30px;
}

.grid{
    margin-left: 450px;
    width: 456px;
    height: 456px;
    display: flex;
    flex-wrap: wrap;
}

.square{
    width: 150px;
    height: 150px;
    border: solid black 1px;
}

.mole{
    background-image: url('mole.png');
    background-size: cover;
}

@media (max-width: 901px) {
    .start{
        margin: 150px 300px;
    }

    #timer{
        margin-bottom: 15px;
    }
    
    .grid {
        margin-left: 230px;
        width: 366px;
        height: 366px;
    }

    .square{
        width: 120px;
        height: 120px;
    }
}

@media (max-width: 650px) {
    .start{
        margin: 200px 240px;
    }

    #timer{
        margin-bottom: 10px;
    }
    
    .grid {
        margin-left: 150px;
        width: 306px;
        height: 306px;
    }

    .square{
        width: 100px;
        height: 100px;
    }
}

@media (max-width: 550px) {
    .start{
        margin: 150px 120px;
    }

    .grid {
        margin-left: 100px;
    }

}

@media (max-width: 450px) {
    .start{
        margin: 100px 100px;
    }

    .grid {
        margin-left: 50px;
    }

}

@media (max-width: 370px) {
    .start{
        margin: 100px 50px;
    }

    .grid {
        margin-left: 20px;
    }

}