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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>Loading RSS Feeds</title>
    <style>
        body {
            font-family: 'Arial', sans-serif;
            margin: 0;
            padding: 20px;
            background-color: #f5f5f5;
            color: #333;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }
        .loading-message {
            text-align: center;
            font-size: 1.5em;
            color: #2c3e50;
        }
        #loading {
            display: block;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 1000;
        }
        .loader {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 50px;
            height: 50px;
            border: 5px solid #f3f3f3;
            border-top: 5px solid #3498db;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        @keyframes spin {
            0% { transform: translate(-50%, -50%) rotate(0deg); }
            100% { transform: translate(-50%, -50%) rotate(360deg); }
        }
    </style>
</head>
<body>
    <div id="loading"><div class="loader"></div></div>
    <div class="loading-message">Loading RSS feeds...</div>
</body>
</html>