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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>News Feed Hub</title>
    <style>
        body {
            font-family: 'Arial', sans-serif;
            margin: 0;
            padding: 20px;
            background-color: #f4f4f9;
            color: #333;
        }
        h1 {
            text-align: center;
            color: #2c3e50;
        }
        .search-container {
            text-align: center;
            margin: 20px 0;
        }
        .search-bar {
            width: 50%;
            padding: 12px;
            font-size: 16px;
            border: 2px solid #3498db;
            border-radius: 25px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            outline: none;
            transition: border-color 0.3s;
        }
        .search-bar:focus {
            border-color: #2980b9;
        }
        .category-section {
            margin: 30px 0;
        }
        .category-title {
            background-color: #3498db;
            color: white;
            padding: 10px;
            border-radius: 5px;
            font-size: 1.4em;
            text-align: center;
        }
        .tiles {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
        }
        .article-tile {
            background-color: white;
            width: 300px;
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
            transition: transform 0.2s;
            overflow: hidden;
        }
        .article-tile:hover {
            transform: scale(1.05);
        }
        .article-tile img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            border-radius: 5px;
        }
        .title a {
            font-size: 1.1em;
            color: #2c3e50;
            text-decoration: none;
            display: block;
            margin: 10px 0;
        }
        .title a:hover {
            color: #3498db;
        }
        .summary {
            color: #555;
            font-size: 0.9em;
            margin: 5px 0;
        }
        .sentiment {
            font-style: italic;
            color: #7f8c8d;
            font-size: 0.85em;
        }
        .published {
            font-size: 0.8em;
            color: #95a5a6;
        }
        #loading {
            display: none;
            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>
    <script>
        document.addEventListener('DOMContentLoaded', () => {
            const form = document.querySelector('form');
            const loading = document.getElementById('loading');
            
            form.addEventListener('submit', () => {
                loading.style.display = 'block';
            });

            window.addEventListener('load', () => {
                loading.style.display = 'none';
            });
        });
    </script>
</head>
<body>
    <div id="loading"><div class="loader"></div></div>
    <h1>News Feed Hub</h1>
    <div class="search-container">
        <form method="POST">
            <input type="text" name="search" class="search-bar" placeholder="Search news semantically...">
        </form>
    </div>
    {% for category, articles in categorized_articles.items() %}
    <div class="category-section">
        <div class="category-title">{{ category }}</div>
        <div class="tiles">
            {% for article in articles %}
            <div class="article-tile">
                <img src="{{ article.image }}" alt="Article Image">
                <div class="title"><a href="{{ article.link }}" target="_blank">{{ article.title }}</a></div>
                <div class="summary">{{ article.summary }}</div>
                <div class="sentiment">Sentiment: {{ article.sentiment }}</div>
                <div class="published">Published: {{ article.published }}</div>
            </div>
            {% endfor %}
        </div>
    </div>
    {% endfor %}
</body>
</html>