body{
    height: 100vh;
    width: 100vw;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: aliceblue;
}
.container{
    height: 600px;
    width: 300px;
    min-width: 300px;
    border: 2px solid black;
    border-radius: 10px;
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    justify-content: center; 
    align-items: center;
    padding: 15px;
    background-color: rgba(0,0,0,0.4);
    box-shadow: 10px 10px 15px rgba(0,0,0,0.6);
}
#display{
    font-size: 20px;
    height: 50px;
    width: 90%;
    margin: 10px;
    border: 1px solid black;
    border-radius: 5px;
    padding: 10px;
    background-color: rgba(0,0,0,0.7);
    color: white;
}
.btn-container{
    height: 80%;
    width: 80%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}
.butt{
    font-size: 20px;
    font-weight: 700;
    height: 65px;
    width: 65px;
    margin: 5px;
    border-radius: 5px;
    background-color: rgba(255,255,255,0.7);
}
#fun-butt{
    background-color: rgba(236, 164, 69,0.8);
    color: #fff;
}
.butt:hover{
   transform: scale(0.9);
   transition: all;
   transition-timing-function: ease-in-out;
   transition-duration: 0.1s;
}