* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary: #1e3a8a;
            --primary-light: #3b82f6;
            --accent: #ef4444;
            --success: #10b981;
            --bg: #f8fafc;
            --surface: #ffffff;
            --border: #e2e8f0;
            --text: #1e293b;
            --text-secondary: #64748b;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "Helvetica", "Arial", sans-serif;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-feature-settings: "kern", "liga", "ss01", "ss02";
            letter-spacing: -0.01em;
            background: linear-gradient(135deg, var(--bg) 0%, #f1f5f9 100%);
            color: var(--text);
            min-height: 100vh;
            padding: 20px;
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
        }

        header {
            background: var(--surface);
            padding: 20px;
            border-radius: 12px;
            margin-bottom: 30px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .header-title h1 {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .header-title p {
            color: var(--text-secondary);
            font-size: 14px;
        }

        .company-selector {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .company-selector select {
            padding: 10px 15px;
            border: 2px solid var(--primary);
            border-radius: 8px;
            background: white;
            color: var(--text);
            font-weight: 500;
            cursor: pointer;
        }

        .header-actions button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 14px;
            margin-left: 10px;
            transition: all 0.3s ease;
        }

        .header-actions button:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(30, 58, 138, 0.3);
        }

        .btn-danger {
            background: var(--accent) !important;
        }

        .btn-success {
            background: var(--success) !important;
        }

        .main-grid {
            display: grid;
            grid-template-columns: 250px 1fr;
            gap: 30px;
        }

        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .nav-item {
            background: var(--surface);
            padding: 15px;
            border-radius: 10px;
            cursor: pointer;
            border-left: 4px solid transparent;
            transition: all 0.3s ease;
            font-weight: 500;
            color: var(--text-secondary);
        }

        .nav-item:hover {
            background: var(--bg);
            color: var(--primary);
        }

        .nav-item.active {
            background: var(--primary);
            color: white;
            border-left-color: var(--accent);
        }

        .content {
            background: var(--surface);
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        }

        .section {
            display: none;
        }

        .section.active {
            display: block;
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        h2 {
            color: var(--primary);
            margin-bottom: 20px;
            font-size: 24px;
        }

        h3 {
            color: var(--text);
            margin-top: 25px;
            margin-bottom: 15px;
            font-size: 16px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--text-secondary);
        }

        .form-group {
            margin-bottom: 20px;
        }

        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--text);
            font-size: 14px;
        }

        input, select, textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 14px;
            font-family: inherit;
            transition: all 0.3s ease;
        }

        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        button {
            padding: 12px 24px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .btn-primary {
            background: var(--primary-light);
            color: white;
        }

        .btn-primary:hover {
            background: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
        }

        .btn-secondary {
            background: var(--bg);
            color: var(--text);
            border: 1px solid var(--border);
        }

        .btn-secondary:hover {
            background: var(--border);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }

        thead {
            background: var(--bg);
            border-bottom: 2px solid var(--border);
        }

        th {
            padding: 15px;
            text-align: left;
            font-weight: 600;
            color: var(--primary);
            font-size: 13px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        td {
            padding: 15px;
            border-bottom: 1px solid var(--border);
        }

        tr:hover {
            background: var(--bg);
        }

        .empty-state {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-secondary);
        }

        .empty-state-icon {
            font-size: 48px;
            margin-bottom: 15px;
            opacity: 0.5;
        }

        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .badge-primary {
            background: rgba(30, 58, 138, 0.15);
            color: var(--primary);
        }

        .badge-success {
            background: rgba(16, 185, 129, 0.15);
            color: var(--success);
        }

        .action-buttons {
            display: flex;
            gap: 8px;
        }

        .btn-small {
            padding: 6px 12px;
            font-size: 12px;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .btn-edit {
            background: var(--primary-light);
            color: white;
        }

        .btn-delete {
            background: var(--accent);
            color: white;
        }

        .btn-view {
            background: var(--success);
            color: white;
        }

        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 1000;
            justify-content: center;
            align-items: center;
        }

        .modal.active {
            display: flex;
        }

        .modal-content {
            background: var(--surface);
            padding: 30px;
            border-radius: 12px;
            width: 90%;
            max-width: 800px;
            max-height: 90vh;
            overflow-y: auto;
            animation: slideUp 0.3s ease;
        }

        @keyframes slideUp {
            from {
                transform: translateY(30px);
                opacity: 0;
            }
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px solid var(--border);
        }

        .close-btn {
            background: none;
            border: none;
            font-size: 28px;
            cursor: pointer;
            color: var(--text-secondary);
            padding: 0;
            width: 30px;
            height: 30px;
        }

        .document-preview {
            background: #f5f5f5;
            padding: 40px;
            border-radius: 8px;
            font-family: 'Courier New', monospace;
            font-size: 13px;
            line-height: 1.6;
            margin-top: 20px;
            max-height: 500px;
            overflow-y: auto;
            border: 1px solid var(--border);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 12px;
            margin-bottom: 30px;
        }

        .stat-card {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: white;
            padding: 14px 10px;
            border-radius: 10px;
            text-align: center;
        }

        .stat-number {
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 3px;
        }

        .stat-label {
            font-size: 10.5px;
            opacity: 0.9;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            line-height: 1.2;
        }

        .company-card {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: white;
            padding: 25px;
            border-radius: 12px;
            margin-bottom: 20px;
        }

        .company-card h3 {
            color: white;
            margin-top: 0;
        }

        .company-info {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-top: 15px;
            font-size: 14px;
        }

        .company-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        .company-item {
            background: var(--bg);
            padding: 20px;
            border-radius: 10px;
            border: 2px solid var(--border);
            transition: all 0.3s ease;
        }

        .company-item:hover {
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(30, 58, 138, 0.15);
        }

        .company-item h4 {
            color: var(--primary);
            margin-bottom: 10px;
        }

        .company-item p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 5px;
        }

        .company-actions {
            display: flex;
            gap: 10px;
            margin-top: 15px;
        }

        @media (max-width: 768px) {
            .main-grid {
                grid-template-columns: 1fr;
            }

            .form-row {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            header {
                flex-direction: column;
                text-align: center;
            }

            .header-actions {
                margin-top: 15px;
            }

            .header-actions button {
                margin: 5px;
            }
        }

        /* ===== Bank Book / Ledger Styles ===== */
        .bb-stats-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 12px;
            margin-bottom: 20px;
        }
        .bb-stat-card {
            padding: 14px 16px;
            border-radius: 10px;
            color: white;
            box-shadow: 0 2px 6px rgba(0,0,0,0.06);
        }
        .bb-stat-card .v {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 3px;
            word-break: break-all;
        }
        .bb-stat-card .l {
            font-size: 11px;
            opacity: 0.95;
            text-transform: uppercase;
            letter-spacing: 0.6px;
        }
        .bb-credit { background: linear-gradient(135deg, #059669 0%, #10b981 100%); }
        .bb-credit-gst { background: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%); }
        .bb-debit  { background: linear-gradient(135deg, #b91c1c 0%, #ef4444 100%); }
        .bb-debit-gst { background: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%); }
        .bb-tds    { background: linear-gradient(135deg, #c2410c 0%, #f97316 100%); }
        .bb-balance { background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%); }

        .bb-toolbar {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
            margin-bottom: 14px;
            padding: 12px;
            background: var(--bg);
            border-radius: 8px;
            border: 1px solid var(--border);
        }
        .bb-toolbar .grow { flex: 1 1 200px; }
        .bb-toolbar input, .bb-toolbar select {
            padding: 8px 10px;
            font-size: 13px;
            border: 1px solid var(--border);
            border-radius: 6px;
        }
        .bb-toolbar button {
            padding: 8px 14px;
            font-size: 13px;
        }

        .bb-table-wrap {
            overflow-x: auto;
            border: 1px solid var(--border);
            border-radius: 8px;
            background: white;
        }
        table.bb-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 12.5px;
            margin-top: 0;
            min-width: 1400px;
        }
        table.bb-table thead {
            background: var(--primary);
        }
        table.bb-table th {
            color: white;
            padding: 10px 8px;
            text-align: left;
            font-size: 11px;
            font-weight: 600;
            border-right: 1px solid rgba(255,255,255,0.2);
            white-space: nowrap;
        }
        table.bb-table td {
            padding: 8px;
            border-bottom: 1px solid #f1f5f9;
            border-right: 1px solid #f1f5f9;
            vertical-align: top;
        }
        table.bb-table tbody tr:hover { background: #fef3c7; }
        table.bb-table .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
        table.bb-table .center { text-align: center; }
        table.bb-table .row-credit { background: #ecfdf5; }
        table.bb-table .row-debit  { background: #fef2f2; }
        table.bb-table .row-summary {
            background: #d1fae5 !important;
            font-weight: 700;
        }
        table.bb-table .row-prev {
            background: #f8fafc !important;
            font-weight: 600;
        }
        .bb-link {
            color: var(--primary-light);
            text-decoration: underline;
            cursor: pointer;
            font-size: 12px;
        }
        .bb-link:hover { color: var(--primary); }
        .bb-tag {
            display: inline-block;
            padding: 2px 8px;
            border-radius: 10px;
            font-size: 10px;
            font-weight: 600;
            text-transform: uppercase;
        }
        .bb-tag-cash { background: #fef3c7; color: #92400e; }
        .bb-tag-bank { background: #dbeafe; color: #1e40af; }
        .bb-tag-card { background: #fce7f3; color: #9f1239; }
        .bb-tag-upi  { background: #d1fae5; color: #065f46; }
        .bb-tag-cheque { background: #e0e7ff; color: #3730a3; }

        .bb-mini-actions { display: flex; gap: 4px; }
        .bb-mini-actions button {
            padding: 4px 8px;
            font-size: 11px;
            border-radius: 4px;
        }

        .summary-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-bottom: 20px;
        }
        .summary-card {
            background: white;
            border: 1px solid var(--border);
            border-left: 4px solid var(--primary-light);
            border-radius: 8px;
            padding: 18px;
        }
        .summary-card h4 {
            font-size: 12px;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 0.6px;
            margin-bottom: 8px;
        }
        .summary-card .big {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
        }
        .summary-card .sub {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 4px;
        }
        .summary-card.credit { border-left-color: #10b981; }
        .summary-card.credit .big { color: #047857; }
        .summary-card.debit { border-left-color: #ef4444; }
        .summary-card.debit .big { color: #b91c1c; }
        .summary-card.net { border-left-color: #f97316; }
        .summary-card.net .big { color: #c2410c; }

        .csv-mapping-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            margin-bottom: 8px;
            align-items: center;
        }
        .csv-mapping-row label { margin: 0; font-size: 13px; }

        @media (max-width: 1100px) {
            .bb-stats-grid { grid-template-columns: repeat(3, 1fr); }
            .summary-card-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 600px) {
            .bb-stats-grid { grid-template-columns: repeat(2, 1fr); }
            .summary-card-grid { grid-template-columns: 1fr; }
        }