style.css

.calculators{
    display: grid;
    grid-template-columns: auto;
    width: 200px;
    gap: 5px;
    grid-column-start: 1;
    grid-column-end: 4;
    color: antiquewhite;
}

.calculators select{
    padding: 5px;
    background-color: #17202A;
    border-color: #00FF00;
    color: antiquewhite;
}

.options{
    display: block;
}

.numbersGrid {
    display: inline-grid;
    grid-gap: 10px;
    grid-template-columns: auto auto auto;
    background-color: #17202A;
    padding: 15px;
    margin: 8px;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    
    }

.numbersGrid input{
    grid-column-start: 1;
    grid-column-end: 4;
    padding: 15px 10px;
    background-color: #17202A;
    color: antiquewhite;
    border-color: #00FF00;
}

button{
    padding: 8px 8px;
    text-align: center;
    font-weight: bold;
    background-color: #17202A;
    color: antiquewhite;
    border-color: #00FF00;
    
}

button:hover{
    transform: scale(1.5,1.5);
}

button:nth-child(17){
    background-color:orangered;
    border-color: orangered;
}
button:nth-child(18){
    grid-column-start: 1;
    grid-column-end: 4;
    transform: none;
}