Spreadsheet Widget: How to adjust column width on each column instead of fixed width for all columns?

- How to adjust column width on each column instead of fixed width for all columns? I want to extend the width on Column A only.

You may use classes of the columns to change the width with CSS. For example, use the .A class to affect the Column1.

Example:

.A {
width: 200px;
}
.B {
width: 40px;
}
.C {
width: 30px;
}

Thanks Mike, the adjusted column width is fine now.
However, text values on Column A are now right-align, how can I change it
to left-align? I added custom CSS but seems not work, please see as
attached. Besides, can I hide the spreadsheet row number 1, 2, 3, etc.?
...

Please try the next CSS to align the text in column A, and to hide very the first column:

.A .cell-input {
text-align: left;
}
tr th:first-of-type {
display: none;
}

Thank you Mike.
...