To select a form using CSS, you can use the form selector.

For example, if you have a form with the id myForm, you can select it using the following CSS rule:

csharpCopy code#myForm {
  /* CSS properties */
}

You can also use the form element type selector to select all forms on a page:

cssCopy codeform {
  /* CSS properties */
}

Additionally, you can use attribute selectors to select forms based on their attributes. For example, you can select forms with a specific action attribute using the following CSS rule:

cssCopy codeform[action="submit-form.php"] {
  /* CSS properties */
}

You can also select forms with a specific method attribute using the following CSS rule:

cssCopy codeform[method="get"] {
  /* CSS properties */
}

There are many other ways to select forms using CSS, but the above examples should cover the most common use cases.