:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1f1f1f;
    --bg-card: #1a1a1a;
    --border-color: #2a2a2a;
    --border-light: #333;
    --text-primary: #f5f5f5;
    --text-secondary: #a0a0a0;
    --text-muted: #666;
    --accent-yellow: #fbbf24;
    --accent-orange: #f97316;
    --accent-green: #22c55e;
    --accent-red: #ef4444;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --radius: 8px;
    --radius-lg: 12px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', -apple-system, sans-serif; background: var(--bg-primary); color: var(--text-primary); min-height: 100vh; line-height: 1.5; }
.mono { font-family: 'JetBrains Mono', monospace; }
.app-container { display: flex; min-height: 100vh; }
.sidebar { width: 260px; background: var(--bg-secondary); border-right: 1px solid var(--border-color); padding: 1.5rem; display: flex; flex-direction: column; position: fixed; height: 100vh; overflow-y: auto; }
.main-content { flex: 1; margin-left: 260px; padding: 2rem; }
.logo { display: flex; align-items: center; gap: 0.75rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border-color); margin-bottom: 1.5rem; }
.logo-icon { width: 40px; height: 40px; background: linear-gradient(135deg, var(--accent-yellow), var(--accent-orange)); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; font-size: 1.25rem; }
.logo-text { font-weight: 700; font-size: 1.125rem; }
.logo-text span { color: var(--accent-yellow); }
.nav-section { margin-bottom: 1.5rem; }
.nav-section-title { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 0.75rem; padding-left: 0.75rem; }
.nav-link { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem; color: var(--text-secondary); text-decoration: none; border-radius: var(--radius); font-size: 0.9rem; font-weight: 500; transition: all 0.2s; margin-bottom: 0.25rem; }
.nav-link:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.nav-link.active { background: var(--accent-yellow); color: var(--bg-primary); }
.user-info { margin-top: auto; padding-top: 1.5rem; border-top: 1px solid var(--border-color); }
.user-badge { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem; background: var(--bg-tertiary); border-radius: var(--radius); margin-bottom: 0.75rem; }
.user-avatar { width: 36px; height: 36px; background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue)); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 600; }
.user-details { flex: 1; }
.user-name { font-weight: 600; font-size: 0.9rem; }
.user-role { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; }
.logout-btn { width: 100%; padding: 0.75rem; background: var(--bg-tertiary); border: 1px solid var(--border-color); color: var(--text-secondary); border-radius: var(--radius); cursor: pointer; font-size: 0.875rem; font-weight: 500; transition: all 0.2s; }
.logout-btn:hover { background: var(--accent-red); border-color: var(--accent-red); color: white; }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border-color); flex-wrap: wrap; gap: 1rem; }
.page-title { font-size: 1.75rem; font-weight: 700; }
.page-subtitle { color: var(--text-secondary); font-size: 0.9rem; margin-top: 0.25rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.75rem 1.25rem; font-size: 0.9rem; font-weight: 600; border-radius: var(--radius); border: none; cursor: pointer; transition: all 0.2s; text-decoration: none; }
.btn-primary { background: var(--accent-yellow); color: var(--bg-primary); }
.btn-primary:hover { background: var(--accent-orange); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); border: 1px solid var(--border-color); }
.btn-secondary:hover { border-color: var(--text-muted); }
.btn-success { background: var(--accent-green); color: white; }
.btn-danger { background: var(--accent-red); color: white; }
.btn-sm { padding: 0.5rem 0.875rem; font-size: 0.8rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1rem; }
.btn-icon { padding: 0.625rem; }
.card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 1.5rem; }
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border-color); }
.card-title { font-size: 1rem; font-weight: 600; }
.form-group { margin-bottom: 1.25rem; }
.form-label { display: block; font-size: 0.85rem; font-weight: 500; color: var(--text-secondary); margin-bottom: 0.5rem; }
.form-input, .form-select, .form-textarea { width: 100%; padding: 0.75rem 1rem; background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: var(--radius); color: var(--text-primary); font-size: 0.95rem; font-family: inherit; }
.form-input:focus, .form-select:focus, .form-textarea:focus { outline: none; border-color: var(--accent-yellow); }
.form-input::placeholder { color: var(--text-muted); }
.form-textarea { min-height: 100px; resize: vertical; }
.form-hint { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.375rem; }
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; padding: 0.875rem 1rem; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); border-bottom: 1px solid var(--border-color); }
td { padding: 1rem; border-bottom: 1px solid var(--border-color); font-size: 0.9rem; }
tr:hover td { background: var(--bg-tertiary); }
.badge { display: inline-flex; padding: 0.25rem 0.625rem; font-size: 0.75rem; font-weight: 600; border-radius: 100px; text-transform: uppercase; }
.badge-success { background: rgba(34, 197, 94, 0.15); color: var(--accent-green); }
.badge-warning { background: rgba(251, 191, 36, 0.15); color: var(--accent-yellow); }
.badge-danger { background: rgba(239, 68, 68, 0.15); color: var(--accent-red); }
.badge-info { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue); }
.badge-purple { background: rgba(139, 92, 246, 0.15); color: var(--accent-purple); }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-bottom: 2rem; }
.stat-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 1.25rem; }
.stat-label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; margin-bottom: 0.5rem; }
.stat-value { font-size: 2rem; font-weight: 700; font-family: 'JetBrains Mono', monospace; }
.stat-value.green { color: var(--accent-green); }
.stat-value.yellow { color: var(--accent-yellow); }
.stat-value.red { color: var(--accent-red); }
.stat-value.blue { color: var(--accent-blue); }
.alert { padding: 1rem 1.25rem; border-radius: var(--radius); margin-bottom: 1.5rem; }
.alert-success { background: rgba(34, 197, 94, 0.1); border: 1px solid rgba(34, 197, 94, 0.3); color: var(--accent-green); }
.alert-error { background: rgba(239, 68, 68, 0.1); border: 1px solid rgba(239, 68, 68, 0.3); color: var(--accent-red); }
.alert-warning { background: rgba(251, 191, 36, 0.1); border: 1px solid rgba(251, 191, 36, 0.3); color: var(--accent-yellow); }
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.8); display: none; align-items: center; justify-content: center; z-index: 1000; padding: 2rem; }
.modal-overlay.active { display: flex; }
.modal { background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: var(--radius-lg); width: 100%; max-width: 600px; max-height: 90vh; overflow-y: auto; }
.modal-header { padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
.modal-title { font-size: 1.125rem; font-weight: 600; }
.modal-close { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.5rem; }
.modal-body { padding: 1.5rem; }
.modal-footer { padding: 1rem 1.5rem; border-top: 1px solid var(--border-color); display: flex; justify-content: flex-end; gap: 0.75rem; }
.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 1024px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .sidebar { display: none; } .main-content { margin-left: 0; } .grid-2, .grid-3 { grid-template-columns: 1fr; } }
.item-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 1.25rem; transition: all 0.2s; }
.item-card:hover { border-color: var(--border-light); }
.item-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 0.75rem; }
.item-name { font-weight: 600; }
.item-barcode { font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; color: var(--text-muted); margin-top: 0.25rem; }
.item-meta { display: flex; gap: 1rem; margin-top: 0.75rem; font-size: 0.85rem; color: var(--text-secondary); }
.empty-state { text-align: center; padding: 4rem 2rem; color: var(--text-muted); }
.empty-state h3 { color: var(--text-secondary); margin-bottom: 0.5rem; }
.action-buttons { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.search-bar { position: relative; }
.search-bar input { padding-left: 2.75rem; }
.category-tag { display: inline-flex; align-items: center; gap: 0.375rem; padding: 0.25rem 0.625rem; border-radius: 100px; font-size: 0.75rem; }
.category-dot { width: 8px; height: 8px; border-radius: 50%; }
.scanner-area { background: var(--bg-tertiary); border: 2px dashed var(--border-light); border-radius: var(--radius-lg); padding: 2rem; text-align: center; }
.checkbox-item { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem; background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: var(--radius); cursor: pointer; margin-bottom: 0.5rem; }
.checkbox-item:hover { border-color: var(--border-light); }
.checkbox-item.selected { border-color: var(--accent-yellow); background: rgba(251, 191, 36, 0.1); }
.checkbox-item input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent-yellow); }
.batch-toolbar { background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 1rem; margin-bottom: 1rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.batch-count { font-weight: 600; color: var(--accent-yellow); }
.tabs { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; }
.tab { padding: 0.75rem 1.25rem; background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: var(--radius); color: var(--text-secondary); cursor: pointer; font-weight: 500; }
.tab:hover { border-color: var(--border-light); }
.tab.active { background: var(--accent-yellow); color: var(--bg-primary); border-color: var(--accent-yellow); }