:root{--primary-color: #9333ea;--primary-light: #a855f7;--primary-dark: #7e22ce;--secondary-color: #c084fc;--accent-color: #e9d5ff;--success-color: #10b981;--danger-color: #ef4444;--warning-color: #f59e0b;--info-color: #3b82f6;--light-purple: #faf5ff;--medium-purple: #f3e8ff;--dark-purple: #581c87;--text-primary: #1f2937;--text-secondary: #6b7280;--bg-light: #faf5ff;--bg-white: #ffffff;--border-color: #e9d5ff;--shadow-sm: 0 1px 2px 0 rgba(147, 51, 234, .05);--shadow: 0 4px 6px -1px rgba(147, 51, 234, .1), 0 2px 4px -1px rgba(147, 51, 234, .06);--shadow-lg: 0 10px 15px -3px rgba(147, 51, 234, .1), 0 4px 6px -2px rgba(147, 51, 234, .05);--shadow-xl: 0 20px 25px -5px rgba(147, 51, 234, .1), 0 10px 10px -5px rgba(147, 51, 234, .04)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Poppins,Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,var(--light-purple) 0%,var(--medium-purple) 100%);min-height:100vh;color:var(--text-primary)}.navbar{background:#fffffff2!important;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:var(--shadow);border-bottom:1px solid var(--border-color)}.navbar-brand{font-weight:700;font-size:1.5rem;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-link{color:var(--text-primary)!important;font-weight:500;transition:all .3s ease}.nav-link:hover,.nav-link.active{color:var(--primary-color)!important}.btn-primary{background:linear-gradient(135deg,var(--primary-color),var(--primary-light))!important;border:none!important;color:#fff!important;font-weight:600;padding:.625rem 1.5rem;border-radius:.5rem;box-shadow:var(--shadow);transition:all .3s ease}.btn-primary:hover{background:linear-gradient(135deg,var(--primary-dark),var(--primary-color))!important;box-shadow:var(--shadow-lg);transform:translateY(-2px);color:#fff!important}.btn-secondary{background:var(--accent-color)!important;border:none!important;color:var(--primary-dark)!important;font-weight:600;padding:.625rem 1.5rem;border-radius:.5rem;transition:all .3s ease}.btn-secondary:hover{background:var(--medium-purple)!important;color:var(--primary-dark)!important}.btn-outline-primary{border:2px solid var(--primary-color)!important;color:var(--primary-color)!important;font-weight:600;padding:.625rem 1.5rem;border-radius:.5rem;transition:all .3s ease}.btn-outline-primary:hover{background:var(--primary-color)!important;color:#fff!important}.btn-outline-secondary{border:2px solid var(--border-color)!important;color:var(--text-secondary)!important;font-weight:600;padding:.625rem 1.5rem;border-radius:.5rem;transition:all .3s ease}.btn-outline-secondary:hover{background:var(--border-color)!important;color:var(--text-primary)!important}.btn-success{background:var(--success-color)!important;border:none!important;color:#fff!important}.btn-danger{background:var(--danger-color)!important;border:none!important;color:#fff!important}.btn-light{background:#fff!important;border:none!important;color:var(--primary-color)!important}.card{border:1px solid var(--border-color);border-radius:1rem;box-shadow:var(--shadow);transition:all .3s ease;background:#fff;overflow:hidden}.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.card-header{background:linear-gradient(135deg,var(--light-purple),var(--medium-purple))!important;border-bottom:1px solid var(--border-color);font-weight:600;color:var(--primary-dark)}.card-body{padding:1.5rem}.card-title{color:var(--text-primary);font-weight:600}.card-text{color:var(--text-secondary)}.card-subtitle{color:var(--text-secondary);font-size:.875rem}.form-control,.form-select{border:2px solid var(--border-color)!important;border-radius:.5rem;padding:.75rem 1rem;transition:all .3s ease;background:var(--light-purple)}.form-control:focus,.form-select:focus{border-color:var(--primary-color)!important;box-shadow:0 0 0 .2rem #9333ea40!important;background:#fff}.form-label{font-weight:600;color:var(--text-primary);margin-bottom:.5rem}.form-check-input:checked{background-color:var(--primary-color)!important;border-color:var(--primary-color)!important}.table{background:#fff;border-radius:.5rem;overflow:hidden}.table thead{background:linear-gradient(135deg,var(--light-purple),var(--medium-purple))}.table thead th{border:none;color:var(--primary-dark);font-weight:600;text-transform:uppercase;font-size:.875rem;padding:1rem}.table tbody tr{border-bottom:1px solid var(--border-color);transition:all .3s ease}.table tbody tr:hover{background:var(--light-purple)}.table tbody td{padding:1rem;vertical-align:middle}.badge{padding:.375rem .75rem;border-radius:.5rem;font-weight:600}.badge-success{background:#10b9811a;color:var(--success-color)}.badge-danger{background:#ef44441a;color:var(--danger-color)}.badge-warning{background:#f59e0b1a;color:var(--warning-color)}.badge-info{background:#3b82f61a;color:var(--info-color)}.badge-primary{background:#9333ea1a;color:var(--primary-color)}.alert{border:none;border-radius:.5rem;box-shadow:var(--shadow)}.alert-success{background:#10b9811a;color:var(--success-color);border-left:4px solid var(--success-color)}.alert-danger{background:#ef44441a;color:var(--danger-color);border-left:4px solid var(--danger-color)}.alert-warning{background:#f59e0b1a;color:var(--warning-color);border-left:4px solid var(--warning-color)}.alert-info{background:#3b82f61a;color:var(--info-color);border-left:4px solid var(--info-color)}.pagination .page-link{color:var(--primary-color);border:1px solid var(--border-color);margin:0 .25rem;border-radius:.5rem;transition:all .3s ease}.pagination .page-link:hover{background:var(--light-purple);border-color:var(--primary-color)}.pagination .page-item.active .page-link{background:var(--primary-color);border-color:var(--primary-color)}.hero-section{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;padding:4rem 0;position:relative}.section{padding:4rem 0}.section-title{font-size:2rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem}.section-subtitle{color:var(--primary-color);font-weight:600;margin-bottom:2rem}.page-title{font-size:2rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem}.book-card{transition:all .3s ease}.book-card:hover{transform:translateY(-8px)}.book-card img{height:300px;-o-object-fit:cover;object-fit:cover}.book-card .card-body{padding:1.25rem}.book-card .book-title{font-size:1.125rem;font-weight:600;color:var(--text-primary);margin-bottom:.5rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.book-card .book-author{color:var(--text-secondary);font-size:.875rem;margin-bottom:.75rem}.book-card .book-rating{display:flex;align-items:center;gap:.25rem;color:var(--warning-color)}.status-available{background:#10b9811a;color:var(--success-color);padding:.25rem .75rem;border-radius:1rem;font-size:.75rem;font-weight:600}.status-borrowed{background:#ef44441a;color:var(--danger-color);padding:.25rem .75rem;border-radius:1rem;font-size:.75rem;font-weight:600}.status-returned{background:#3b82f61a;color:var(--info-color);padding:.25rem .75rem;border-radius:1rem;font-size:.75rem;font-weight:600}.status-overdue{background:#f59e0b1a;color:var(--warning-color);padding:.25rem .75rem;border-radius:1rem;font-size:.75rem;font-weight:600}.copy-code{font-family:Courier New,monospace;font-weight:700;font-size:.875rem;padding:.5rem .75rem;border-radius:.5rem;border:2px solid var(--border-color);background:var(--light-purple);color:var(--primary-dark)}.copy-code.available{border-color:var(--success-color);background:#10b9811a;color:var(--success-color)}.copy-code.borrowed{border-color:var(--danger-color);background:#ef44441a;color:var(--danger-color)}footer{background:#fff;border-top:1px solid var(--border-color);padding:3rem 0;margin-top:4rem}footer h5{color:var(--primary-dark);font-weight:600;margin-bottom:1rem}footer a{color:var(--text-secondary);text-decoration:none;transition:all .3s ease}footer a:hover{color:var(--primary-color)}@media (max-width: 768px){.hero-section{padding:3rem 0}.section-title{font-size:1.5rem}.book-card img{height:250px}}.text-purple{color:var(--primary-color)!important}.bg-purple-light{background:var(--light-purple)!important}.bg-purple-gradient{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color))!important}.border-purple{border-color:var(--primary-color)!important}.shadow-purple{box-shadow:var(--shadow)!important}.spinner-border-purple{border-color:var(--primary-color);border-right-color:transparent}.modal-content{border:1px solid var(--border-color);border-radius:1rem}.modal-header{background:linear-gradient(135deg,var(--light-purple),var(--medium-purple));border-bottom:1px solid var(--border-color)}.modal-footer{border-top:1px solid var(--border-color)}.dropdown-menu{border:1px solid var(--border-color);border-radius:.5rem;box-shadow:var(--shadow-lg)}.dropdown-item{transition:all .3s ease}.dropdown-item:hover{background:var(--light-purple);color:var(--primary-color)}.breadcrumb{background:transparent;padding:0}.breadcrumb-item a{color:var(--primary-color);text-decoration:none}.breadcrumb-item a:hover{text-decoration:underline}.breadcrumb-item.active{color:var(--text-secondary)}.form-text{color:var(--text-secondary);font-size:.875rem}.input-group-text{background:var(--light-purple);border:2px solid var(--border-color);color:var(--text-primary)}.bg-white\/10{background:#ffffff1a!important}