/* --- CSS DESIGN --- */
        body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: #f8f9fa; margin: 0; padding: 0; color: #333; }
        .hero-section { background-color: #ffffff; padding: 40px 20px; text-align: center; box-shadow: 0 4px 15px rgba(0,0,0,0.05); margin-bottom: 30px; }
        .hero-title { color: #2c3e50; font-size: 2.2rem; margin-bottom: 5px; margin-top: 0; }
        .hero-subtitle { color: #7f8c8d; font-size: 1rem; margin-bottom: 25px; }
        .search-container { max-width: 700px; margin: 0 auto; position: relative; }
        #searchInput { width: 100%; padding: 15px 20px; font-size: 1.1rem; border: 2px solid #ddd; border-radius: 50px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); transition: all 0.3s ease; box-sizing: border-box; }
        #searchInput:focus { outline: none; border-color: #007bff; box-shadow: 0 6px 12px rgba(0,123,255,0.15); }
        .filter-container { display: flex; justify-content: center; gap: 15px; margin-top: 20px; flex-wrap: wrap; }
        select { padding: 12px 15px; font-size: 1rem; border: 1px solid #ccc; border-radius: 8px; background-color: white; cursor: pointer; min-width: 150px; }
        
        /* Container Utama */
        .content-container { max-width: 1000px; margin: 0 auto 50px auto; padding: 0 20px; text-align: center; }
        
        /* Statistik Jumlah Buku (YANG KAMU MINTA DIKEMBALIKAN) */
        .result-stats {
            text-align: center;
            margin-bottom: 15px;
            color: #555;
            font-size: 0.95rem;
            background-color: #e9ecef;
            display: inline-block;
            padding: 5px 15px;
            border-radius: 20px;
            font-weight: 500;
        }

        /* Table Responsive */
        .table-responsive { width: 100%; overflow-x: auto; box-shadow: 0 2px 5px rgba(0,0,0,0.05); border-radius: 8px; background: white; }
        table { width: 100%; min-width: 600px; border-collapse: collapse; background-color: white; }
        thead { background-color: #B1894A; color: white; }
        th, td { padding: 15px 20px; text-align: left; border-bottom: 1px solid #eee; white-space: nowrap; vertical-align: middle; }
        td.title-col { white-space: normal; min-width: 200px; font-weight: 600; color: #2c3e50; }
        tbody tr:nth-child(even) { background-color: #f8f9fa; }
        tbody tr:hover { background-color: #e2e6ea; }
        
        /* Status Bar (Hanya muncul jika Error/Demo, tidak muncul kalau sukses) */
        .status-bar {
            font-size: 0.8rem;
            padding: 5px 10px;
            border-radius: 4px;
            margin-bottom: 10px;
            display: inline-block;
        }
        .status-demo { background-color: #fff3cd; color: #664d03; border: 1px solid #ffecb5; }

        .no-results { margin-top: 20px; padding: 40px; color: #888; font-size: 1.2rem; background: white; border-radius: 8px; display: none; }
        .no-results.visible { display: block; }

        @media (max-width: 768px) {
            .hero-title { font-size: 1.8rem; }
            .filter-container { flex-direction: column; }
            select { width: 100%; }
        }