*,*::after,*::before{
box-sizing: border-box;
font-family: Arial, Helvetica, sans-serif;
font-weight: normal;
}
body{
    padding: 0;
    margin: 0;
    background: linear-gradient(90deg, #fcff9e 0%, #c67700 100%);
}
.calculator-Gird{
display: grid;
justify-content: center;
align-content: center;
grid-template-columns: repeat(4,100px);
grid-template-rows: minmax(120px,auto) repeat(5,100px);
min-height: 100vh;

}
.span-two{
    grid-column: span 2;
}
.output{
    grid-column: 1/-1;
    display: flex;
    align-items: flex-end;
    flex-direction: column;
    justify-content: space-around;
    padding: 10px;
    background-color: rgba(0, 0, 0, 0.75);
    margin: 3px;
    word-wrap: break-word;
    word-break: break-all;
}
.calculator-Gird > button{
    cursor: pointer;
    font-size: 2rem;
    border:1px solid white;
    outline: none;
    background-color: rgba(255, 255, 255, 0.75);
}
.calculator-Gird > button:hover{
    background-color: rgba(255, 255, 255, 0.9);
}
.output .previous_operand{
    color: rgba(255, 255, 255, 0.75);
    font-size: 1.5rem;
}
.output .present_operand{
    color:white;
    font-size: 2.5rem;
}
.operator{
color:#9c5f02 ;
}
#equals{
    background-color: #c67700 ;
    color: white;
}
#equals:hover{
    background-color: #c67700af ;
}