:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light;color:#213547;background-color:#f5f5f5}*{box-sizing:border-box;margin:0;padding:0}body{min-height:100vh;padding:20px}#root{max-width:1200px;margin:0 auto}.header{text-align:center;margin-bottom:30px}.header h1{font-size:28px;color:#1a1a1a;margin-bottom:8px}.header p{color:#666;font-size:14px}.search-box{background:#fff;padding:24px;border-radius:12px;box-shadow:0 2px 8px #00000014;margin-bottom:24px}.search-box h2{font-size:16px;margin-bottom:16px;color:#333}.search-form{display:flex;gap:12px}.search-form input{flex:1;padding:12px 16px;font-size:16px;border:2px solid #e0e0e0;border-radius:8px;outline:none;transition:border-color .2s}.search-form input:focus{border-color:#3498db}.search-form button{padding:12px 32px;font-size:16px;font-weight:500;color:#fff;background:#3498db;border:none;border-radius:8px;cursor:pointer;transition:background .2s}.search-form button:hover{background:#2980b9}.search-form button:disabled{background:#bdc3c7;cursor:not-allowed}.quick-search{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}.quick-search span{font-size:13px;color:#888}.quick-search button{padding:6px 14px;font-size:13px;color:#3498db;background:#ebf5fb;border:none;border-radius:20px;cursor:pointer;transition:background .2s}.quick-search button:hover{background:#d4e6f1}.results{display:grid;gap:16px}.paper-card{background:#fff;padding:20px;border-radius:12px;box-shadow:0 2px 8px #00000014;transition:box-shadow .2s}.paper-card:hover{box-shadow:0 4px 16px #0000001f}.paper-card h3{font-size:18px;color:#1a1a1a;margin-bottom:8px;line-height:1.4}.paper-card .title-en{font-size:13px;color:#666;font-style:italic;margin-bottom:12px}.paper-card .meta{font-size:13px;color:#888;margin-bottom:12px}.paper-card .summary{font-size:14px;color:#555;line-height:1.6;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.paper-card .actions{display:flex;gap:12px}.paper-card .actions button{padding:8px 16px;font-size:14px;border:none;border-radius:6px;cursor:pointer;transition:all .2s}.paper-card .actions .btn-primary{background:#3498db;color:#fff}.paper-card .actions .btn-primary:hover{background:#2980b9}.paper-card .actions .btn-secondary{background:#ecf0f1;color:#333}.paper-card .actions .btn-secondary:hover{background:#d5dbdb}.loading{text-align:center;padding:60px 20px;color:#666}.spinner{width:40px;height:40px;border:3px solid #e0e0e0;border-top-color:#3498db;border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 16px}@keyframes spin{to{transform:rotate(360deg)}}.error{background:#fee;color:#c00;padding:16px;border-radius:8px;margin-bottom:20px}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.modal{background:#fff;border-radius:12px;width:100%;max-width:900px;max-height:90vh;overflow:auto}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;border-bottom:1px solid #eee}.modal-header h2{font-size:18px}.modal-header .close-btn{background:none;border:none;font-size:24px;cursor:pointer;color:#888}.modal-body{padding:24px}.preview-frame{width:100%;height:500px;border:1px solid #ddd;border-radius:8px}.html-output{margin-top:20px}.html-output textarea{width:100%;height:200px;padding:12px;font-family:monospace;font-size:13px;border:1px solid #ddd;border-radius:8px;resize:vertical}.copy-success{color:#27ae60;font-size:14px;margin-top:8px}.footer{text-align:center;margin-top:40px;padding:20px;color:#888;font-size:13px}.footer a{color:#3498db;text-decoration:none}