How do I access a form after clicking a button using html and css?
To access a form after clicking a button in HTML and CSS, you need to use JavaScript to create an event listener for the button click. Then, you can manipulate the visibility or display property of the form using JavaScript or CSS.

Here's an example of how to do this with JavaScript:

HTML:

```
<button id=showFormBtn>Show Form </button>
<form id=form style=display:none;>
  <!-- form elements here -->
</form>

```

JavaScript:

```
const btn = document.getElementById(showFormBtn);
const form = document.getElementById(form);

btn.addEventListener(click, function() {
  form.style.display = block;
});

```

This will make the form become visible when the button is clicked.
Thanks, it works!
How do I make the first element of the form get focused after clicking the button and how do I hide the form when clicking the button again?
To focus the first element of the form and to hide the form when the button is clicked again, you can modify the JavaScript code as follows:

JavaScript:
```
const btn = document.getElementById(showFormBtn);
const form = document.getElementById(form);

btn.addEventListener(click, function() {
  if (form.style.display === block) {
    form.style.display = none;
  } else {
    form.style.display = block;
    form.elements[0].focus();
  }
});
```
In this code, the JavaScript checks the display property of the form. If the display property is block, the form is hidden by setting the display property to none. If the display property is not block, the form is shown by setting the display property to block and focusing the first element of the form using the focus() method.