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Responsive Testimonial Carousel and Grid Visibility

Explore how to implement a responsive testimonial section that switches between a swipeable carousel on mobile, a two-column grid on tablets, and a three-column grid with photos on desktop. Learn to manage visibility and layout using CSS only, focusing on breakpoints, hidden elements, and layout adaptation to enhance engagement and readability across devices.

Problem description

Given an HTML page with a testimonial section containing two main elements:

  • A <div class="testimonial-carousel"> that wraps multiple <div class="testimonial-item"> elements (each containing .testimonial-text and hidden .author-photo)

  • A <div class="testimonial-grid"> that wraps multiple <div class="testimonial-item"> elements (each containing .testimonial-text and an <img class="author-photo" ...