body{
    display: flex;
    align-items:center;
    justify-content: center;
    flex-direction: column;
    background-color: lightskyblue;
    margin:0;
    padding:0;
}

h1 {
    margin-bottom: 100px;
    text-align: center;
    font-size: 100px;
}

.container{
    display: flex;
    flex-direction: column;
    height:800px;
    width:600px;
    align-items: center;
    border: 10px solid black;
    background-color: black;
    margin:0;
    padding:0;
    box-sizing:border-box;
}

#input{
    display: flex;
    background-color: bisque;
    height:200px;
    width: 100%;
    box-sizing:border-box;
    font-size: 5rem;
    align-items: flex-end;
    justify-content: flex-end;
    padding-right: 20px;
    overflow-wrap: normal;     
}

#insertion{
    display:flex;
    height: 2.5rem;
    width: 100%;
    justify-content: flex-end;
    background-color: bisque;
    font-size: 2rem;
    padding-right: 20px;
    padding-top: 10px;
    box-sizing:border-box;
}
.grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    box-sizing: border-box;
    padding:0px;
    margin:0px;
    flex: 1;
}

.grid button {
    flex: 1 0 25%;
    font-size: 2.5rem;
    box-sizing: border-box;
    border: 2px solid black; 
}
.grid button:active{
    transform:scale(.98);
}
#\={
    background-color: orange;
}

#\=:hover{
    opacity: 90%;
}

#\=:active{
    opacity: 75%;
    transform:scale(.98);
}