body{
    background: rgb(157, 247, 249);
}
.heading{
    color:rgb(37, 36, 36);
    text-align:center;
    font-size: 4rem;
    background-color:aqua;
}
button{
    height:70px;
    width:120px;
    border-radius: 20px;
    margin-bottom: 4px;
    border:3px solid black;
    box-shadow: 1px 1px 1px 1px grey;
}
.display{
    height:60px;
    width:490px;
    text-align:right;
    border:3px solid black;
    border-radius: 10px;
    margin-bottom: 4px;
    background-color: rgb(227, 227, 227);
 
}
.layout{
    justify-content: center;
    justify-items: center;
    text-align:center;
    margin-top: 100px;
    
}
.c{
    background-color: rgb(247, 193, 55);
}

.a{
    background-color: rgb(175, 174, 174);
}
.a:hover{
    opacity:0.8;
}
.c:hover{
    opacity:0.8;
}