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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Video Comparison Slider</title>
    <style>
        :root {
            --container-width: 90vw; /* Define a custom property for width */
        }
        body, html {
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background-color: black;
        }
        .video-container {
            position: relative;
            width: var(--container-width); /* Use the custom property for width */
            height: calc(var(--container-width) * 9 / 16); /* Calculate height based on width */
            overflow: hidden;
        }
        video {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .second-video {
            clip-path: inset(0 50% 0 0);
        }
        .slider {
            position: absolute;
            top: 0;
            left: 30%;
            width: 2px;
            height: 100%;
            background: rgb(0, 80, 150);
            cursor: ew-resize;
            z-index: 10;
            animation: slide-animation 5s ease-in-out forwards;
            border-radius: 4px;
            box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.2);
        }
        .slider::before,
        .slider::after {
            content: '';
            position: absolute;
            top: 80%;
            transform: translateY(-50%);
            width: 30px;
            height: 30px;
            background-size: contain;
            background-repeat: no-repeat;
            transition: opacity 0.3s;
        }
        .slider::before {
            left: -27px;
            /* Simplified arrowhead pointing left */
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="rgb(0, 80, 150)"><polygon points="14,7 8,12 14,17"/></svg>');
        }
        .slider::after {
            right: -27px;
            /* Simplified arrowhead pointing right */
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="rgb(0, 80, 150)"><polygon points="10,7 16,12 10,17"/></svg>');
        }
        .slider.ready:hover::before,
        .slider.ready:hover::after {
            transform: translateY(-50%) scale(1.2);
        }
        .slider.ready::before,
        .slider.ready::after {
            opacity: 0.7;
        }
        .slider.ready:hover::before,
        .slider.ready:hover::after {
            opacity: 1;
        }
        @keyframes slide-animation {
            0% {
                left: 100%;
            }
            10% {
                left: 80%;
            }
            20% {
                left: 85%;
            }
            50% {
                left: 20%;
            }
            70% {
                left: 60%;
            }
            100% {
                left: 30%;
            }
        }
    </style>
</head>
<body>
    <div class="video-container" id="videoContainer">
        <video id="video1" src="flir_brain_padded.mp4" playsinline autoplay loop muted></video>
        <video id="video2" class="second-video" src="flir_20240905_120243.mp4" playsinline autoplay loop muted></video>
        <div class="slider" id="slider"></div>
    </div>

    <script>
        const slider = document.getElementById('slider');
        const container = document.getElementById('videoContainer');
        const video2 = document.getElementById('video2');
        let isDragging = false;

        // Mouse events for slider
        slider.addEventListener('mousedown', () => isDragging = true);
        window.addEventListener('mouseup', () => isDragging = false);
        window.addEventListener('mousemove', (event) => {
            if (!isDragging) return;
            handleSlide(event.clientX);
        });

        // Touch events for slider
        slider.addEventListener('touchstart', () => isDragging = true);
        window.addEventListener('touchend', () => isDragging = false);
        window.addEventListener('touchmove', (event) => {
            if (!isDragging) return;
            handleSlide(event.touches[0].clientX);
        });

        function handleSlide(positionX) {
            const rect = container.getBoundingClientRect();
            const offsetX = positionX - rect.left;
            const sliderPosition = Math.max(0, Math.min(offsetX, rect.width));
            // Move slider position
            slider.style.left = `${sliderPosition}px`;
            // Adjust second video visibility using clip-path
            video2.style.clipPath = `inset(0 ${rect.width - sliderPosition}px 0 0)`;
        }

        // Function to update clip-path in real-time
        function updateClipPath() {
            const rect = container.getBoundingClientRect();
            const sliderPosition = parseFloat(window.getComputedStyle(slider).left);
            video2.style.clipPath = `inset(0 ${rect.width - sliderPosition}px 0 0)`;
            requestAnimationFrame(updateClipPath);
        }

        // Enable user control after the animation ends
        slider.addEventListener('animationend', () => {
            slider.classList.add('ready');
            slider.style.animation = 'none';
            slider.style.cursor = 'ew-resize';
            slider.style.pointerEvents = 'auto';
        });

        // Start updating clip-path once the page loads
        window.onload = () => updateClipPath();
    </script>
</body>
</html>