Dark Mode Collapse

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Dark Mode Collapse</title>
    <style>
        body {
            font-family: 'Arial', sans-serif;
            background-color: #1b1b1b;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
            color: #fff;
        }
        .collapsible-container {
            width: 80%;
            max-width: 600px;
            margin: 20px;
            background: #333;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
        }
        .collapsible-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: #444;
            padding: 15px 20px;
            cursor: pointer;
            color: #fff;
            font-size: 1.25rem;
            font-weight: bold;
            border-bottom: 1px solid #555;
        }
        .collapsible-header:hover {
            background-color: #555;
        }
        .collapsible-header:after {
            content: '➕';
            font-size: 1.5rem;
            transition: transform 0.3s ease;
        }
        .collapsible-header.collapsed:after {
            transform: rotate(45deg);
        }
        .collapsible-content {
            display: none;
            padding: 20px;
            background-color: #1b1b1b;
            color: #fff;
            border-top: 1px solid #555;
        }
        .collapsible-content p {
            margin: 0;
            font-size: 1rem;
            line-height: 1.5;
        }
        .collapsible-content img {
            width: 100%;
            border-radius: 10px;
            margin-top: 10px;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
        }
        .animate-slide {
            animation: slideDown 0.5s forwards;
        }
        @keyframes slideDown {
            0% {
                opacity: 0;
                transform: translateY(-20px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }
    </style>
</head>
<body>
    <div class="collapsible-container">
        <div class="collapsible-header">
            <span>Click to Expand <span>✨</span></span>
            <i class="icon"></i>
        </div>
        <div class="collapsible-content">
            <p>Welcome to this dark mode styled collapsible section! 🎨 Enjoy the sleek and modern dark design with smooth animations.</p>
            <img src="https://via.placeholder.com/400x200" alt="Placeholder Image">
        </div>
    </div>
    <script>
        document.addEventListener("DOMContentLoaded", () => {
            const header = document.querySelector(".collapsible-header");
            const content = document.querySelector(".collapsible-content");
            header.addEventListener("click", () => {
                if (content.style.display === "block") {
                    content.style.display = "none";
                    header.classList.remove("collapsed");
                } else {
                    content.style.display = "block";
                    content.classList.add("animate-slide");
                    header.classList.add("collapsed");
                }
            });
        });
    </script>
</body>
</html>

Dark Mode Collapse - VexaX