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HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Animated Loading Screen</title>
    <style>
        /* General Reset and Body Setup */
        body {
            margin: 0;
            padding: 0;
            font-family: Arial, sans-serif;
            background-color: #f4f4f9;
        }

/* 1. Loading Screen Container */
        #loading-screen {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(34, 40, 49, 0.95); /* Dark semi-transparent background */
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            transition: opacity 0.5s ease-out; /* For smooth fading */
        }

/* 2. Spinner Container (Holds the dots) */
        .spinner-container {
            width: 100px;
            display: flex;
            justify-content: space-between;
        }

/* 3. Dot Styling */
        .dot {
            width: 18px;
            height: 18px;
            background-color: #00adb5; /* Teal color */
            border-radius: 50%;
            animation: bounce 1.4s infinite ease-in-out both;
        }

/* 4. Staggered Animation Delays */
        .dot-1 { animation-delay: -0.32s; }
        .dot-2 { animation-delay: -0.16s; }
        .dot-3 { animation-delay: 0s; }

/* 5. Keyframes for Bounce Animation */
        @keyframes bounce {
            0%, 80%, 100% {
                transform: scale(0);
                opacity: 0.5;
            }
            40% {
                transform: scale(1.0);
                opacity: 1;
            }
        }

/* Content Styling (Hidden until loaded) */
        #content {
            padding: 20px;
            text-align: center;
            display: none; /* Initially hidden */
            transition: opacity 1s;
        }
    </style>
</head>
<body>

<div id="loading-screen">
        <div class="spinner-container">
            <div class="dot dot-1"></div>
            <div class="dot dot-2"></div>
            <div class="dot dot-3"></div>
        </div>
    </div>

<div id="content">
        <h1>Content Loaded Successfully!</h1>
        <p>This content was hidden while the loading animation was running.</p>
    </div>

// 1. Start the fade out effect
                loadingScreen.style.opacity = '0';

// 2. Wait for the transition to finish, then set display: none
                loadingScreen.addEventListener('transitionend', function() {
                    loadingScreen.style.display = 'none';
                    content.style.display = 'block';
                    content.style.opacity = '1';
                });

}, 3000);
        });
    </script>
</body>
</html>

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