*,*::before, *::after{
    box-sizing: border-box;
    font-family: Gotham Rounded, sans-serif;
    font-weight: normal;
}
body{
    padding: 0px;
    margin: 10px;
    background: linear-gradient(to right,#114357,#f29492);
}
.calculator-grid{
    display: grid;
    justify-content: center;
    align-content: center;
    /* min-height: 10vh; */
    grid-template-columns: repeat(4,80px);
    grid-template-rows: minmax(100px,auto) repeat(5,80px);

}
.calculator-grid >button{
    cursor: pointer;
    font-size: 1.5rem;
    border: 1px solid white;
    outline: none;
    background-color: rgba(255,255,255, .75);
}
.calculator-grid>button:hover{
    background-color: rgba(255,255,255, .9);
}
.span-two{
    grid-column: span 2;
}
.output{
    grid-column: 1/-1;
    background-color: rgba(0,0,0, .75);
    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-oparand{
    color: rgba(255,255,255, .75);
    font-size: 1rem;
}

.output .current-oparand{
    color: white;
    font-size: 1.5rem;
}