Problem description

Given a <section class="fullscreen-section"><div class="content"></div><button class="cta-btn"></button></section>, write CSS so the section always fills the viewport and the .cta-btn is pinned to the bottom center of the section, even if the content div grows. Both content and button should always be visible and never overlap.

Goal

Keep the CTA button at the bottom center of the fullscreen section, regardless of content height.

Constraints

• No JavaScript is allowed.

• Do not modify HTML.

Sample visual output

Here’s what the output would look like:

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