:root{--primary: #4f46e5;--primary-light: #6366f1;--primary-dark: #3730a3;--primary-bg: #eef2ff;--success: #10b981;--success-light: #d1fae5;--success-dark: #059669;--warning: #f59e0b;--warning-light: #fef3c7;--warning-dark: #d97706;--danger: #ef4444;--danger-light: #fee2e2;--danger-dark: #dc2626;--info: #3b82f6;--info-light: #dbeafe;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-300: #d1d5db;--gray-400: #9ca3af;--gray-500: #6b7280;--gray-600: #4b5563;--gray-700: #374151;--gray-800: #1f2937;--gray-900: #111827;--sidebar-width: 260px;--sidebar-bg: #1e1b4b;--sidebar-text: #c7d2fe;--sidebar-active: #4f46e5;--sidebar-hover: rgba(255, 255, 255, .08);--bg: #f8fafc;--surface: #ffffff;--border: #e5e7eb;--border-radius: 12px;--border-radius-sm: 8px;--border-radius-lg: 16px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow: 0 1px 3px 0 rgb(0 0 0 / .1), 0 1px 2px -1px rgb(0 0 0 / .1);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 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svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--gray-400);pointer-events:none}.search-input-wrapper .form-control{padding-left:38px}.filter-select{min-width:150px}.books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}.book-card{background:var(--surface);border-radius:var(--border-radius);border:1px solid var(--border);overflow:hidden;box-shadow:var(--shadow-sm);transition:var(--transition-slow);display:flex;flex-direction:column}.book-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);border-color:var(--gray-200)}.book-cover{height:160px;background:linear-gradient(135deg,var(--primary-bg) 0%,#e0e7ff 100%);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.book-cover 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tr:hover{background:var(--gray-50)}.book-cell{display:flex;align-items:center;gap:12px}.book-cell-thumb{width:36px;height:48px;border-radius:4px;background:var(--primary-bg);display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden}.book-cell-thumb img{width:100%;height:100%;object-fit:cover}.book-cell-info .book-title{font-weight:600;color:var(--gray-900);font-size:14px}.book-cell-info .book-author{font-size:12px;color:var(--gray-500);margin-top:2px}.table-actions{display:flex;align-items:center;gap:4px}.action-btn{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:var(--border-radius-sm);background:transparent;border:1px solid transparent;transition:var(--transition);color:var(--gray-500)}.action-btn:hover{background:var(--gray-100);color:var(--gray-800);border-color:var(--gray-200)}.action-btn.edit:hover{color:var(--primary);background:var(--primary-bg);border-color:var(--primary-bg)}.action-btn.delete:hover{color:var(--danger);background:var(--danger-light);border-color:var(--danger-light)}.action-btn.view:hover{color:var(--info);background:var(--info-light);border-color:var(--info-light)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px;animation:fadeIn .2s ease}.modal{background:var(--surface);border-radius:var(--border-radius-lg);box-shadow:var(--shadow-xl);width:100%;max-width:580px;max-height:90vh;display:flex;flex-direction:column;animation:slideUp .25s ease}.modal-sm{max-width:420px}.modal-lg{max-width:720px}.modal-header{padding:20px 24px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-shrink:0}.modal-title{font-size:17px;font-weight:700;color:var(--gray-900)}.modal-close{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:var(--border-radius-sm);background:var(--gray-100);color:var(--gray-500);transition:var(--transition);border:none}.modal-close:hover{background:var(--gray-200);color:var(--gray-800)}.modal-body{padding:20px 24px;overflow-y:auto;flex:1}.modal-footer{padding:16px 24px 20px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:12px;flex-shrink:0}.toast-container{position:fixed;bottom:24px;right:24px;z-index:9999;display:flex;flex-direction:column;gap:10px;pointer-events:none}.toast{display:flex;align-items:center;gap:10px;padding:12px 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var(--border);transition:var(--transition)}.pagination-btn:hover:not(:disabled){background:var(--primary-bg);border-color:var(--primary-light);color:var(--primary)}.pagination-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.pagination-btn:disabled{opacity:.4;cursor:not-allowed}.auth-wrapper{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e1b4b,#312e81,#1e1b4b);padding:24px}.auth-card{background:var(--surface);border-radius:var(--border-radius-lg);box-shadow:var(--shadow-xl);padding:40px;width:100%;max-width:420px}.auth-logo{text-align:center;margin-bottom:28px}.auth-logo-icon{width:60px;height:60px;background:var(--primary);border-radius:16px;display:inline-flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:16px;box-shadow:0 8px 24px #4f46e566}.auth-logo h1{font-size:22px;font-weight:700;color:var(--gray-900);margin-bottom:6px}.auth-logo p{font-size:14px;color:var(--gray-500)}.auth-error{background:var(--danger-light);color:var(--danger-dark);border:1px solid #fca5a5;border-radius:var(--border-radius-sm);padding:10px 14px;font-size:13px;font-weight:500;margin-bottom:16px;display:flex;align-items:center;gap:8px}.auth-footer{text-align:center;margin-top:20px;font-size:14px;color:var(--gray-500)}.auth-footer a{color:var(--primary);font-weight:600}.auth-footer a:hover{text-decoration:underline}.dashboard-header{margin-bottom:24px}.dashboard-header h2{font-size:22px;font-weight:700;color:var(--gray-900)}.dashboard-header p{font-size:14px;color:var(--gray-500);margin-top:4px}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.section-title{font-size:16px;font-weight:700;color:var(--gray-800)}.category-chart{background:var(--surface);border-radius:var(--border-radius);border:1px solid var(--border);padding:20px;box-shadow:var(--shadow-sm)}.chart-bar-row{display:flex;align-items:center;gap:12px;margin-bottom:12px}.chart-label{font-size:13px;color:var(--gray-600);min-width:90px;font-weight:500}.chart-bar-track{flex:1;height:8px;background:var(--gray-100);border-radius:4px;overflow:hidden}.chart-bar-fill{height:100%;background:var(--primary);border-radius:4px;transition:width .5s ease}.chart-count{font-size:13px;font-weight:600;color:var(--gray-700);min-width:24px;text-align:right}.recent-books{background:var(--surface);border-radius:var(--border-radius);border:1px solid var(--border);box-shadow:var(--shadow-sm);overflow:hidden}.recent-book-item{display:flex;align-items:center;gap:14px;padding:14px 20px;border-bottom:1px solid var(--gray-50);transition:var(--transition)}.recent-book-item:last-child{border-bottom:none}.recent-book-item:hover{background:var(--gray-50)}.recent-book-icon{width:40px;height:52px;border-radius:6px;background:var(--primary-bg);display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden}.recent-book-icon img{width:100%;height:100%;object-fit:cover}.recent-book-info{flex:1;min-width:0}.recent-book-title{font-size:14px;font-weight:600;color:var(--gray-800);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.recent-book-meta{font-size:12px;color:var(--gray-400);margin-top:2px}.book-detail-cover{width:100%;max-width:160px;height:210px;border-radius:10px;background:var(--primary-bg);display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden;box-shadow:var(--shadow-md)}.book-detail-cover img{width:100%;height:100%;object-fit:cover}.book-detail-layout{display:flex;gap:28px}.book-detail-body{flex:1}.book-detail-title{font-size:22px;font-weight:700;color:var(--gray-900);margin-bottom:4px;line-height:1.3}.book-detail-author{font-size:15px;color:var(--gray-500);margin-bottom:16px}.book-detail-meta{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0;padding:16px;background:var(--gray-50);border-radius:var(--border-radius-sm)}.meta-label{font-size:11px;font-weight:600;color:var(--gray-400);text-transform:uppercase;letter-spacing:.05em}.meta-value{font-size:14px;font-weight:600;color:var(--gray-800);margin-top:2px}.book-detail-desc{font-size:14px;color:var(--gray-600);line-height:1.7;margin-top:16px}.view-toggle{display:flex;border:1px solid var(--border);border-radius:var(--border-radius-sm);overflow:hidden}.view-toggle-btn{padding:7px 12px;background:var(--surface);border:none;color:var(--gray-500);transition:var(--transition);display:flex;align-items:center}.view-toggle-btn:hover{background:var(--gray-50)}.view-toggle-btn.active{background:var(--primary);color:#fff}.status-toggle{display:flex;border:1px solid var(--border);border-radius:20px;overflow:hidden;width:fit-content}.status-toggle-btn{padding:4px 14px;font-size:12px;font-weight:600;background:var(--surface);border:none;color:var(--gray-500);transition:var(--transition)}.status-toggle-btn.active-available{background:var(--success-light);color:var(--success-dark)}.status-toggle-btn.active-issued{background:var(--warning-light);color:var(--warning-dark)}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(40px)}to{opacity:1;transform:translate(0)}}@keyframes 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0px}.sidebar{transform:translate(-260px);width:260px}.sidebar.open{transform:translate(0)}.sidebar-overlay.visible{display:block}.main-content{margin-left:0}.header-menu-btn{display:flex}.page-content{padding:16px}.stats-grid{grid-template-columns:repeat(2,1fr);gap:12px}.filter-row{flex-direction:column}.search-input-wrapper{min-width:100%}.filter-select{width:100%}.form-row{grid-template-columns:1fr}.modal{margin:0;max-height:95vh}.book-detail-layout{flex-direction:column;align-items:center}.book-detail-meta{grid-template-columns:1fr}.header-title h1{font-size:16px}.header-title p{display:none}.auth-card{padding:28px 20px}.toast-container{bottom:16px;right:16px;left:16px}.toast{min-width:unset;max-width:100%}}@media (max-width: 480px){.stats-grid{grid-template-columns:1fr 1fr}.books-grid{grid-template-columns:1fr}}.text-center{text-align:center}.mt-4{margin-top:16px}.mb-4{margin-bottom:16px}.w-full{width:100%}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-2{gap:8px}.gap-4{gap:16px}.font-bold{font-weight:700}.text-sm{font-size:13px}.text-xs{font-size:11px}.text-gray{color:var(--gray-500)}.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}:root{color-scheme:dark;--primary: #8b7cff;--primary-light: #a99fff;--primary-dark: #7162e8;--primary-bg: #28234b;--success-light: #12372f;--success-dark: #6ee7b7;--warning-light: #3b2d13;--warning-dark: #fcd34d;--danger-light: #401f27;--danger-dark: #fca5a5;--info-light: #172c48;--gray-50: #151923;--gray-100: #1c2230;--gray-200: #293143;--gray-300: #39445a;--gray-400: #8b96aa;--gray-500: #a4aec0;--gray-600: #bac3d2;--gray-700: #d2d9e4;--gray-800: #e5e9f0;--gray-900: #f5f7fb;--sidebar-bg: #111521;--sidebar-active: #5144b8;--bg: #10131b;--surface: #191e29;--border: #2b3241;--shadow-sm: 0 1px 2px rgb(0 0 0 / .2);--shadow: 0 1px 3px rgb(0 0 0 / .25), 0 1px 2px -1px rgb(0 0 0 / .25);--shadow-md: 0 4px 10px rgb(0 0 0 / .25);--shadow-lg: 0 10px 24px rgb(0 0 0 / .3);--shadow-xl: 0 20px 45px rgb(0 0 0 / .4)}body{color:var(--gray-800)}::-webkit-scrollbar-track{background:var(--gray-100)}::-webkit-scrollbar-thumb{background:var(--gray-300)}.book-cover{background:linear-gradient(135deg,#252044,#1e2940)}.auth-wrapper{background:radial-gradient(ellipse at 15% 15%,#29244b 0%,transparent 42%),radial-gradient(ellipse at 85% 85%,#142c3a 0%,transparent 40%),#10131b}.auth-error{border-color:#74343f}.login-wrapper{gap:clamp(32px,8vw,120px);padding:48px}.login-aside{width:min(420px,40vw);color:#f5f7fb}.login-aside-mark{font-size:38px;margin-bottom:42px}.login-eyebrow,.login-aside-caption{color:#a99fff;font-size:11px;font-weight:700;letter-spacing:.16em}.login-aside h2{font-size:clamp(34px,4vw,52px);line-height:1.08;letter-spacing:-.04em;margin:16px 0}.login-aside p{max-width:360px;color:#a4aec0;font-size:16px;line-height:1.7}.login-aside-line{width:48px;height:3px;background:#8b7cff;border-radius:3px;margin:36px 0 14px}.login-card{max-width:460px;padding:44px;border:1px solid #2b3241;background:#191e29f0}.login-card .auth-logo{text-align:left;margin-bottom:32px}.login-card .auth-logo-icon{display:none}.login-card .auth-logo h1{font-size:29px;letter-spacing:-.03em}.login-card .auth-logo p{color:var(--gray-500)}.form-control,select.form-control{color-scheme:dark}.badge-category{color:#c6beff}.badge-available{color:#6ee7b7}.badge-issued{color:#fcd34d}@media (max-width: 760px){.login-wrapper{padding:20px}.login-aside{display:none}.login-card{padding:32px 24px}}