:root{--primary:#059669;--primary-dark:#047857;--secondary:#6b7280;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--info:#3b82f6;--na:#8b5cf6;--background:#f9fafb;--surface:#ffffff;--text:#111827;--text-light:#6b7280;--border:#e5e7eb;--shadow:0 1px 3px 0 rgba(0,0,0,.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.1);--transition:all .3s ease}
[data-theme="dark"]{--primary:#34d399;--primary-dark:#10b981;--secondary:#9ca3af;--success:#34d399;--warning:#fbbf24;--danger:#f87171;--info:#60a5fa;--na:#a78bfa;--background:#0f172a;--surface:#1e293b;--text:#f1f5f9;--text-light:#94a3b8;--border:#334155;--shadow:0 1px 3px 0 rgba(0,0,0,.3);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.3)}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background-color:var(--background);color:var(--text);line-height:1.6;transition:var(--transition)}
.container{max-width:1400px;margin:2rem auto;padding:0 1rem}
.header{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:white;padding:3rem 2rem;border-radius:16px;margin-bottom:2rem;box-shadow:var(--shadow-lg);position:relative;overflow:hidden;display:flex;justify-content:space-between;align-items:center}
.header::before{content:'';position:absolute;top:-50%;right:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.1) 0%,transparent 70%);animation:pulse 4s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:scale(1);opacity:.5}50%{transform:scale(1.1);opacity:.3}}
.header-content{position:relative;z-index:1}
.header h1{font-size:2rem;font-weight:700;margin-bottom:.25rem;text-shadow:2px 2px 4px rgba(0,0,0,.3)}
.header p{font-size:1rem;opacity:.9}
#currentDateTime{margin-top:5px;font-size:1rem}
.theme-toggle{position:relative;z-index:1;background:rgba(255,255,255,.2);border-radius:50px;padding:.5rem;display:flex;align-items:center;gap:.5rem;cursor:pointer;transition:var(--transition);border:none}
.theme-toggle:hover{background:rgba(255,255,255,.3)}
.theme-icon{width:24px;height:24px;color:white}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;margin-bottom:2rem}
.stat-card{background:var(--surface);border-radius:12px;padding:1.5rem;box-shadow:var(--shadow);position:relative;overflow:hidden;transition:var(--transition);border-left:4px solid var(--primary)}
.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.stat-card.success{border-left-color:var(--success)}.stat-card.warning{border-left-color:var(--warning)}.stat-card.danger{border-left-color:var(--danger)}.stat-card.na{border-left-color:var(--na)}
.stat-card h3{font-size:2rem;font-weight:700;margin-bottom:.25rem}
.stat-card.primary h3{color:var(--primary)}.stat-card.success h3{color:var(--success)}.stat-card.warning h3{color:var(--warning)}.stat-card.danger h3{color:var(--danger)}.stat-card.na h3{color:var(--na)}
.stat-card p{color:var(--text-light);font-size:.875rem;text-transform:uppercase;letter-spacing:.05em}
.controls{background:var(--surface);border-radius:12px;padding:1.5rem;margin-bottom:1.5rem;box-shadow:var(--shadow)}
.controls-grid{display:grid;grid-template-columns:1fr auto auto;gap:1rem;align-items:center}
.search-container{position:relative}
.search-input{width:100%;padding:.875rem 1rem .875rem 3rem;border:2px solid var(--border);border-radius:10px;font-size:.875rem;transition:var(--transition);background:var(--background);color:var(--text)}
.search-input:focus{outline:none;border-color:var(--primary);background:var(--surface)}
.search-icon{position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:var(--text-light);width:20px;height:20px}
.btn{padding:.75rem 1.25rem;border:none;border-radius:10px;font-size:.875rem;font-weight:600;cursor:pointer;transition:var(--transition);display:inline-flex;align-items:center;gap:.5rem;text-decoration:none;white-space:nowrap}
.btn-primary{background-color:var(--primary);color:white}.btn-primary:hover{background-color:var(--primary-dark)}
.btn-secondary{background-color:var(--surface);color:var(--text);border:2px solid var(--border)}.btn-secondary:hover{border-color:var(--primary);color:var(--primary)}
.btn-info{background-color:var(--info);color:white}.btn-danger{background-color:var(--danger);color:white}
.multiple-action-bar{background:var(--surface);border-radius:12px;padding:1rem 1.5rem;margin-bottom:1rem;box-shadow:var(--shadow);border:2px solid var(--info)}
.multiple-action-content{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}
.multiple-action-buttons{display:flex;gap:.75rem;flex-wrap:wrap}
.selected-count-badge{background:var(--info);color:white;border-radius:50%;width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;font-weight:700;margin-left:.5rem}
.filters{background:var(--surface);border-radius:12px;padding:1.5rem;margin-bottom:1.5rem;box-shadow:var(--shadow)}
.filters-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}
.filters-header h3{font-size:.875rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-light)}
.clear-filters{background:none;border:none;color:var(--danger);cursor:pointer;font-size:.875rem;font-weight:600}
.filters-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}
.filter-group{display:flex;flex-direction:column;gap:.5rem}
.filter-label{font-size:.875rem;font-weight:600;color:var(--text-light)}
.filter-select,.date-input,.form-input,.form-select,.form-textarea{padding:.625rem .875rem;border:2px solid var(--border);border-radius:8px;background:var(--background);color:var(--text);font-size:.875rem;transition:var(--transition);width:100%}
.filter-select:focus,.date-input:focus,.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:var(--primary)}
.form-textarea{resize:vertical;min-height:80px;font-family:inherit}
.date-range{display:flex;gap:.5rem}
.date-range .date-input{flex:1}
.table-wrapper{background:var(--surface);border-radius:12px;box-shadow:var(--shadow);overflow:hidden}
.tabs{display:flex;border-bottom:1px solid var(--border)}
.tab{padding:1rem 1.5rem;border:none;background:none;cursor:pointer;font-size:.875rem;font-weight:600;color:var(--text-light);transition:var(--transition);border-bottom:2px solid transparent;margin-bottom:-1px}
.tab:hover{color:var(--primary)}.tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.tab-content{display:none}.tab-content.active{display:block}
.table-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;border-bottom:1px solid var(--border)}
.table-title{font-size:1rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-light)}
.table-actions{display:flex;gap:.75rem;align-items:center}
.action-btn{background:var(--background);border:1px solid var(--border);border-radius:8px;padding:.5rem;cursor:pointer;color:var(--text);transition:var(--transition);display:flex;align-items:center;justify-content:center}
.action-btn:hover{border-color:var(--primary);color:var(--primary)}
.history-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:var(--background);border:1px solid var(--border);border-radius:8px;cursor:pointer;font-size:.8rem;font-weight:600;color:var(--text);transition:var(--transition)}
.history-btn:hover{border-color:var(--primary);color:var(--primary)}
.table-container{position:relative;overflow-x:auto}
table{width:100%;border-collapse:collapse;min-width:900px}
th,td{padding:.75rem 1rem;text-align:left;border-bottom:1px solid var(--border);font-size:.875rem}
th{background:var(--background);font-weight:600;font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-light)}
.borrow-table{min-width:1400px}
.items-selection-table{min-width:600px}
.quantity-badge{display:inline-block;padding:.25rem .75rem;border-radius:9999px;font-size:.75rem;font-weight:600}
.quantity-low{background:rgba(239,68,68,.1);color:var(--danger)}.quantity-medium{background:rgba(245,158,11,.1);color:var(--warning)}.quantity-high{background:rgba(16,185,129,.1);color:var(--success)}
.price-badge{font-weight:600;color:var(--primary)}
.status-badge{display:inline-block;padding:.25rem .75rem;border-radius:9999px;font-size:.75rem;font-weight:600;text-transform:uppercase}
.status-notexpireditems{background:rgba(16,185,129,.1);color:var(--success)}
.status-expiring{background:rgba(245,158,11,.1);color:var(--warning)}
.status-expired{background:rgba(239,68,68,.1);color:var(--danger)}
.status-na{background:rgba(139,92,246,.1);color:var(--na)}
.borrow-status-badge{display:inline-block;padding:.25rem .75rem;border-radius:9999px;font-size:.75rem;font-weight:600;text-transform:uppercase}
.borrow-status-borrowed{background:rgba(245,158,11,.1);color:var(--warning)}
.borrow-status-returned{background:rgba(16,185,129,.1);color:var(--success)}
.borrow-status-overdue{background:rgba(239,68,68,.1);color:var(--danger)}
.action-buttons{display:flex;gap:.25rem;flex-wrap:wrap}
.action-icon-btn{background:var(--background);border:1px solid var(--border);border-radius:6px;padding:.375rem .5rem;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:var(--transition)}
.action-icon-btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.action-icon-btn.borrow:hover{border-color:var(--info);color:var(--info)}
.action-icon-btn.record:hover{border-color:var(--primary);color:var(--primary)}
.action-icon-btn.edit:hover{border-color:var(--warning);color:var(--warning)}
.action-icon-btn.delete:hover{border-color:var(--danger);color:var(--danger)}
.action-icon-btn.edit-return:hover{border-color:var(--secondary);color:var(--secondary)}
.item-image{width:48px;height:48px;object-fit:cover;border-radius:6px;cursor:pointer;transition:transform .2s}
.item-image:hover{transform:scale(1.5)}
.image-placeholder{width:48px;height:48px;background:var(--background);border:1px dashed var(--border);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:.6rem;color:var(--text-light)}
.loading-overlay{display:none;position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.3);border-radius:8px;justify-content:center;align-items:center}
.loading-overlay.show{display:flex}
.spinner{width:40px;height:40px;border:4px solid rgba(255,255,255,.3);border-top-color:white;border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.empty-state{text-align:center;padding:3rem;color:var(--text-light)}
.empty-state svg{width:64px;height:64px;margin:0 auto 1rem;display:block;color:var(--text-light)}
.empty-state h3{font-size:1.125rem;margin-bottom:.5rem}.empty-state p{font-size:.875rem}
.pagination{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;border-top:1px solid var(--border);flex-wrap:wrap;gap:.75rem}
.pagination-info{font-size:.875rem;color:var(--text-light)}
.pagination-controls{display:flex;gap:.25rem;flex-wrap:wrap}
.page-btn{padding:.375rem .75rem;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:6px;cursor:pointer;font-size:.875rem;transition:var(--transition)}
.page-btn:hover:not(.disabled){border-color:var(--primary);color:var(--primary)}
.page-btn.active{background:var(--primary);color:white;border-color:var(--primary)}
.page-btn.disabled{opacity:.5;cursor:not-allowed}
.modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.5);justify-content:center;align-items:center;z-index:1000;padding:1rem}
.modal.show{display:flex}
.modal-content{background:var(--surface);padding:0;border-radius:12px;width:90%;max-width:500px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg)}
.modal-content.modal-wide{max-width:90vw}
.modal-header{padding:1.5rem 1.5rem 0;border-bottom:1px solid var(--border);padding-bottom:1rem}
.modal-title{font-size:1.25rem;font-weight:700}
.modal-body{padding:1.5rem;display:flex;flex-direction:column;gap:1rem}
.modal-footer{padding:1rem 1.5rem 1.5rem;border-top:1px solid var(--border)}
.form-group{display:flex;flex-direction:column;gap:.5rem}
.form-label{font-size:.875rem;font-weight:600}
.form-actions{display:flex;justify-content:flex-end;gap:.75rem}
.btn-cancel{padding:.75rem 1.5rem;border:2px solid var(--border);background:var(--surface);color:var(--text);border-radius:8px;cursor:pointer;font-weight:600;transition:var(--transition)}
.btn-cancel:hover{border-color:var(--danger);color:var(--danger)}
.btn-submit{padding:.75rem 1.5rem;background:var(--primary);color:white;border:none;border-radius:8px;cursor:pointer;font-weight:600;transition:var(--transition)}
.btn-submit:hover{background:var(--primary-dark)}.btn-submit:disabled{opacity:.5;cursor:not-allowed}
.image-upload-container{border:2px dashed var(--border);border-radius:12px;padding:1.5rem;text-align:center;cursor:pointer;transition:var(--transition)}
.image-upload-container:hover,.image-upload-container.dragover{border-color:var(--primary);background:rgba(5,150,105,.05)}
.image-preview img{max-width:100%;max-height:200px;border-radius:8px;margin-bottom:.75rem}
.remove-image-btn{background:var(--danger);color:white;border:none;border-radius:6px;padding:.375rem .75rem;cursor:pointer;font-size:.8rem}
.history-filters{padding:1rem 1.5rem;border-bottom:1px solid var(--border)}
.history-date-range{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap}
.history-date-input{padding:.5rem .875rem;border:2px solid var(--border);border-radius:8px;background:var(--background);color:var(--text);font-size:.875rem}
.condition-quantity-group{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.condition-quantity-item{padding:1rem;border-radius:8px;border:2px solid var(--border)}
.condition-good{border-color:var(--success)}.condition-damaged{border-color:var(--warning)}.condition-lost{border-color:var(--danger)}
.condition-label{font-size:.875rem;font-weight:600;display:block;margin-bottom:.5rem}
.condition-input{width:100%;padding:.5rem;border:1px solid var(--border);border-radius:6px;background:var(--background);color:var(--text);font-size:1rem;text-align:center}
.total-quantity{text-align:center;padding:.75rem;background:var(--background);border-radius:8px;font-weight:600}
.time-format-note{font-size:.75rem;color:var(--text-light);margin-top:.25rem}
.selected-item-row{display:flex;justify-content:space-between;align-items:center;padding:.75rem;background:var(--background);border-radius:8px;margin-bottom:.5rem}
.selected-item-name{font-weight:600}.selected-item-details{font-size:.8rem;color:var(--text-light)}
.selected-item-quantity{display:flex;align-items:center;gap:.5rem}
.quantity-input-small{width:70px;padding:.25rem .5rem;border:1px solid var(--border);border-radius:6px;background:var(--background);color:var(--text)}
.remove-selected-item{background:var(--danger);color:white;border:none;border-radius:6px;padding:.25rem .6rem;cursor:pointer;font-size:.8rem}
.multiple-items-modal .modal-content{max-width:800px}
#toast{position:fixed;bottom:1.5rem;right:1.5rem;background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--primary);color:var(--text);padding:.875rem 1.5rem;border-radius:8px;box-shadow:var(--shadow-lg);z-index:9999;font-size:.875rem;display:none;animation:slideIn .3s ease-out;max-width:400px}
#toast.show{display:block}#toast.error{border-left-color:var(--danger)}#toast.success{border-left-color:var(--success)}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
.message-notification{position:fixed;top:20px;right:20px;padding:1rem 1.5rem;border-radius:8px;color:white;font-weight:500;z-index:10000;box-shadow:var(--shadow-lg);max-width:400px;animation:slideIn .3s ease-out}
.message-success{background-color:var(--success)}.message-error{background-color:var(--danger)}
@media(max-width:768px){.controls-grid{grid-template-columns:1fr}.header{flex-direction:column;text-align:center}.condition-quantity-group{grid-template-columns:1fr}.multiple-action-content{flex-direction:column}}