:root{--primary-color: #2c3e50;--secondary-color: #e67e22;--accent-color: #3498db;--bg-color: #fdfaf6;--card-bg: #ffffff;--text-color: #333;--light-text: #777;--border-radius: 8px;--shadow: 0 4px 15px rgba(0, 0, 0, .1)}[data-theme=dark]{--primary-color: #34495e;--secondary-color: #f39c12;--accent-color: #2980b9;--bg-color: #1a1a1a;--card-bg: #2c2c2c;--text-color: #ecf0f1;--light-text: #bdc3c7;--shadow: 0 4px 15px rgba(0, 0, 0, .5)}*{box-sizing:border-box;margin:0;padding:0;transition:background-color .3s,color .3s,border-color .3s}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--text-color);background-color:var(--bg-color);padding-bottom:50px}h1{text-align:center;padding:40px 20px 10px;color:var(--primary-color);font-size:2.5em}h2,h3{text-align:center;color:var(--primary-color);margin-bottom:20px}hr{border:0;height:1px;background:linear-gradient(to right,transparent,#ccc,transparent);margin:40px 0}header img[title=bookworm]{display:block;margin:0 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