*, *::before, *::after{
    box-sizing: border-box;
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
    font-weight: normal;
}

body{
    padding: 0;
    margin: 0;
    background: linear-gradient(to right, black, rgba(117, 0, 128, 0.719));
}

.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:rgb(104, 104, 104)
}

.calculator-grid > button:hover {
    background-color: rgba(231, 179, 196, 0.897);
}

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

.output {
    grid-column: 1 / -1;
    background-color: rgba(22, 22, 22, 0.938);
    display: flex;
    align-items:flex-end;
    justify-content: space-around;
    flex-direction: column;
    padding: 10px;
    word-wrap: break-word;
    word-wrap: break-all;
}

.output .previous-operand{
    color: rgb(233, 221, 221,.75);
    font-size: 1.5rem;
}
.output .current-operand{
    color: white;
    font-size: 2.2rem;
}