*, *::before, *::after{
    box-sizing: border-box;
    font-family: 'Courier New', Courier, monospace;
    font-weight: normal;
}

body{
    padding: 0%;
    margin: 0%;
    background: linear-gradient(to right, #aa6767 ,#3c2c28);
   
}

.Calculator-grid{
    display: grid;
    justify-content: center;
    align-content: center;
    min-height: 100vh;
    grid-template-columns: repeat(4,100px);
    grid-template-rows: minmax(120px,auto) repeat(5,100px);
}

.Calculator-grid button{
    cursor: pointer;
    font-size: 2rem;
    border: 1px solid white;
    outline: none;
    background-color: rgba(191, 187, 187, 0.75);
}

.Calculator-grid button:hover{
    background-color: rgba(255, 255, 255, 0.9);
    border: 2px solid black;
    border-radius: 7px;
}

.Calculator-grid button:active{
    color: rgb(199, 196, 196);
}

.span-two{
    grid-column: span 2;
}

.Output{
    grid-column: 1 / -1;
    background-color: rgba(0 , 0 , 0 , .75);
    border: 2px solid rgb(212, 209, 209);
    border-radius: 5px;
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    flex-direction: column;
    padding: 10px;
    word-wrap: break-word;
    word-break: break-all;
}

.Output .Previous-operand{
    color: rgba(255 , 255 , 255 , .75);
    font-size: 1.5rem;
}
.Output .Current-operand{
    color: white;
    font-size: 2.5rem;
}