function full_screen_video_shortcode($atts) {
    $atts = shortcode_atts(
        [
            'src' => '', // Video URL
            'headline' => 'Welcome to Our Website', // Default headline text
        ],
        $atts,
        'full_video'
    );

    if (empty($atts['src'])) {
        return '<p>No video URL provided.</p>';
    }

    // Generate a unique ID for this shortcode instance
    $unique_id = uniqid('video-container-');

    // Add inline CSS scoped to the unique ID
    $custom_css = '<style>
        #' . $unique_id . ' { position: relative; width: 100vw; height: 100vh; overflow: hidden; }
        #' . $unique_id . ' video { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; filter: brightness(0.7) !important; }
        #' . $unique_id . ' .headline-text { 
            position: absolute; top: 50%; left: 50%; 
            transform: translate(-50%, -50%);
            color: white; font-family: "Poppins", sans-serif; 
            font-weight: 700 !important; font-size: 3.625em !important; 
            text-align: center; line-height: 1.1 !important; 
        }
    </style>';

    // Hero section video player HTML with headline
    $html = $custom_css . '<div id="' . $unique_id . '">
                <video autoplay muted loop playsinline preload="auto">
                    <source src="' . esc_url($atts['src']) . '" type="video/mp4">
                    Your browser does not support the video tag.
                </video>
                <div class="headline-text">' . esc_html($atts['headline']) . '</div>
            </div>';

    return $html;
}
add_shortcode('full_video', 'full_screen_video_shortcode');