:root {
            --primary-color: #4285F4;
            --secondary-color: #34A853;
            --accent-color: #FBBC05;
            --text-color: #202124;
            --light-gray: #f5f5f5;
            --border-color: #dadce0;
            --shadow-color: rgba(0, 0, 0, 0.1);
            --success-color: #34A853;
            --error-color: #EA4335;
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        body {
            font-family: 'Roboto', sans-serif;
            font-weight: 400;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
            padding: 20px;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 2px 10px var(--shadow-color);
            padding: 30px;
            border: 1px solid var(--border-color);
        }
        
        h1, h2 {
            font-weight: 700;
            color: var(--primary-color);
            text-align: center;
            margin-bottom: 30px;
            font-size: 28px;
            letter-spacing: 0.5px;
        }

        h2 {
            font-size: 22px;
            margin-top: 40px;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        h2 .tooltip-icon {
            cursor: help;
            font-size: 18px;
            color: var(--primary-color);
            position: relative;
        }

        h2 .tooltip-icon .tooltip-text {
            visibility: hidden;
            width: 300px;
            background-color: var(--text-color);
            color: #fff;
            text-align: left;
            border-radius: 6px;
            padding: 10px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            margin-left: -150px;
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 14px;
            font-weight: 400;
            line-height: 1.4;
        }

        h2 .tooltip-icon .tooltip-text::after {
            content: "";
            position: absolute;
            top: 100%;
            left: 50%;
            margin-left: -5px;
            border-width: 5px;
            border-style: solid;
            border-color: var(--text-color) transparent transparent transparent;
        }

        h2 .tooltip-icon:hover .tooltip-text {
            visibility: visible;
            opacity: 1;
        }
        
        .form-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 20px;
            flex-wrap: wrap;
            gap: 20px;
        }
        
        .company-info, .voucher-info {
            flex: 1;
            min-width: 300px;
        }
        
        .form-row {
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }
        
        .form-group {
            flex: 1;
            min-width: 250px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--text-color);
        }
        
        input, select, textarea {
            width: 100%;
            padding: 10px 15px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: 'Roboto', sans-serif;
            font-size: 16px;
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        
        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
        }
        
        select {
            background-color: white;
            cursor: pointer;
            height: 42px;
        }
        
        textarea {
            resize: vertical;
            min-height: 100px;
        }
        
        .button-row {
            display: flex;
            gap: 15px;
            margin-top: 30px;
            flex-wrap: wrap;
        }
        
        button {
            padding: 12px 24px;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            transition: background-color 0.3s, transform 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        
        button:hover {
            transform: translateY(-2px);
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            color: white;
        }
        
        .btn-primary:hover {
            background-color: #3367d6;
        }
        
        .btn-secondary {
            background-color: white;
            color: var(--primary-color);
            border: 1px solid var(--primary-color);
        }
        
        .btn-secondary:hover {
            background-color: #f1f5fe;
        }
        
        .btn-success {
            background-color: var(--success-color);
            color: white;
        }
        
        .btn-success:hover {
            background-color: #2d9047;
        }

        .btn-danger {
            background-color: #EA4335;
            color: white;
        }

        .btn-danger:hover {
            background-color: #d62c1c;
        }
        
        .status-indicator {
            display: flex;
            align-items: center;
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            margin-top: 15px;
            max-width: fit-content;
        }
        
        .status-pending {
            background-color: #fff8e1;
            color: #ff9800;
            border: 1px solid #ffe0b2;
        }
        
        .status-approved {
            background-color: #e8f5e9;
            color: #4caf50;
            border: 1px solid #c8e6c9;
        }

        .status-rejected {
            background-color: #ffebee;
            color: #f44336;
            border: 1px solid #ffcdd2;
        }
        
        .amounts {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: 20px;
            padding: 15px;
            background-color: var(--light-gray);
            border-radius: 8px;
        }
        
        .amount-row {
            display: flex;
            justify-content: space-between;
        }
        
        .amount-row.total {
            font-weight: 700;
            font-size: 18px;
            padding-top: 10px;
            border-top: 1px dashed var(--border-color);
            margin-top: 10px;
        }
        
        .upload-container {
            border: 2px dashed var(--border-color);
            padding: 20px;
            text-align: center;
            border-radius: 6px;
            background-color: var(--light-gray);
            transition: background-color 0.3s;
            cursor: pointer;
        }
        
        .upload-container:hover {
            background-color: #ebebeb;
        }
        
        .hidden {
            display: none;
        }
        
        .company-details {
            margin-top: 15px;
            padding: 15px;
            background-color: var(--light-gray);
            border-radius: 8px;
            display: none;
        }
        
        .company-details.show {
            display: block;
        }
        
        .approval-section {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
        }

        .approval-history {
            margin-top: 20px;
            padding: 15px;
            background-color: var(--light-gray);
            border-radius: 8px;
            font-size: 14px;
        }

        .approval-history h3 {
            font-size: 16px;
            margin-bottom: 10px;
            color: var(--primary-color);
        }

        .approval-history ul {
            list-style: none;
            padding: 0;
        }

        .approval-history li {
            margin-bottom: 5px;
            padding-left: 10px;
            border-left: 3px solid var(--border-color);
        }

        /* Table styles */
        .expense-table-container {
            margin-top: 30px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow-x: auto;
        }

        .expense-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 800px;
        }

        .expense-table th, .expense-table td {
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            text-align: left;
            vertical-align: top;
        }

        .expense-table th {
            background-color: var(--light-gray);
            font-weight: 500;
            color: var(--primary-color);
        }

        .expense-table td input[type="text"],
        .expense-table td input[type="number"] {
            border: none;
            padding: 5px;
            width: 100%;
            background-color: transparent;
        }

        .expense-table td input[type="number"] {
            text-align: right;
        }

        .expense-table td .remove-row-btn {
            background-color: transparent;
            color: var(--error-color);
            border: none;
            padding: 5px;
            cursor: pointer;
            font-size: 18px;
            line-height: 1;
            transition: color 0.2s;
        }

        .expense-table td .remove-row-btn:hover {
            color: #a00;
            transform: none;
        }

        .expense-table-footer {
            display: flex;
            justify-content: flex-end;
            align-items: center;
            padding: 15px;
            background-color: var(--light-gray);
            border-top: 1px solid var(--border-color);
            border-radius: 0 0 8px 8px;
            font-weight: 700;
            font-size: 18px;
        }

        .expense-table-footer span {
            margin-left: 10px;
            color: var(--primary-color);
        }

        .table-actions {
            display: flex;
            gap: 10px;
            margin-top: 20px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .attachment-cell {
            display: flex;
            flex-direction: column;
            gap: 5px;
            min-width: 150px;
        }

        .attachment-cell .attachment-button {
            padding: 6px 10px;
            font-size: 14px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            max-width: fit-content;
        }

        .attachment-cell .attachment-button:hover {
            background-color: #3367d6;
        }

        .attachment-cell .file-list {
            font-size: 12px;
            color: #555;
            max-height: 60px;
            overflow-y: auto;
            border: 1px solid var(--border-color);
            padding: 5px;
            border-radius: 4px;
            background-color: #fcfcfc;
        }

        .attachment-cell .file-list p {
            margin: 0;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .loading-indicator {
            display: none;
            align-items: center;
            gap: 10px;
            margin-left: 15px;
            color: var(--primary-color);
            font-weight: 500;
        }

        .loading-indicator.show {
            display: flex;
        }

        .spinner {
            border: 4px solid rgba(0, 0, 0, 0.1);
            border-left-color: var(--primary-color);
            border-radius: 50%;
            width: 20px;
            height: 20px;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Validation Styles */
        .form-group {
            position: relative;
        }

        .error-message {
            color: var(--error-color);
            font-size: 12px;
            margin-top: 5px;
            display: none;
            animation: slideDown 0.3s ease;
        }

        .error-message.show {
            display: block;
        }

        input.invalid, select.invalid, textarea.invalid {
            border-color: var(--error-color) !important;
            box-shadow: 0 0 0 2px rgba(234, 67, 53, 0.2) !important;
        }

        input.valid, select.valid, textarea.valid {
            border-color: var(--success-color) !important;
        }

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

        /* Toast Notification Styles */
        .toast-container {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 10000;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .toast {
            background-color: white;
            border-radius: 8px;
            padding: 16px 20px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            min-width: 300px;
            max-width: 400px;
            display: flex;
            align-items: center;
            gap: 12px;
            animation: slideInRight 0.3s ease;
            border-left: 4px solid;
        }

        .toast.success {
            border-left-color: var(--success-color);
        }

        .toast.error {
            border-left-color: var(--error-color);
        }

        .toast.info {
            border-left-color: var(--primary-color);
        }

        .toast.warning {
            border-left-color: var(--accent-color);
        }

        .toast-icon {
            font-size: 20px;
            flex-shrink: 0;
        }

        .toast-content {
            flex: 1;
        }

        .toast-title {
            font-weight: 500;
            margin-bottom: 4px;
        }

        .toast-message {
            font-size: 14px;
            color: #666;
        }

        .toast-close {
            background: none;
            border: none;
            font-size: 20px;
            cursor: pointer;
            color: #999;
            padding: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .toast-close:hover {
            color: var(--text-color);
        }

        @keyframes slideInRight {
            from {
                transform: translateX(100%);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }

        /* Auto-save Indicator */
        .auto-save-indicator {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background-color: rgba(0, 0, 0, 0.7);
            color: white;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 12px;
            display: none;
            z-index: 9999;
            animation: fadeIn 0.3s ease;
        }

        .auto-save-indicator.show {
            display: block;
        }

        .auto-save-indicator.saving {
            background-color: var(--primary-color);
        }

        .auto-save-indicator.saved {
            background-color: var(--success-color);
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
            }
            to {
                opacity: 1;
            }
        }

        /* Confirmation Dialog */
        .confirmation-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 10001;
            display: none;
            align-items: center;
            justify-content: center;
        }

        .confirmation-overlay.show {
            display: flex;
        }

        .confirmation-dialog {
            background-color: white;
            border-radius: 8px;
            padding: 24px;
            max-width: 400px;
            width: 90%;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
            animation: scaleIn 0.2s ease;
        }

        @keyframes scaleIn {
            from {
                transform: scale(0.9);
                opacity: 0;
            }
            to {
                transform: scale(1);
                opacity: 1;
            }
        }

        .confirmation-dialog h3 {
            margin-bottom: 12px;
            color: var(--text-color);
            font-size: 18px;
        }

        .confirmation-dialog p {
            margin-bottom: 20px;
            color: #666;
        }

        .confirmation-actions {
            display: flex;
            gap: 10px;
            justify-content: flex-end;
        }

        .confirmation-actions button {
            min-width: 80px;
        }

        /* File validation styles */
        .file-error {
            color: var(--error-color);
            font-size: 11px;
            margin-top: 4px;
        }

        .file-size-info {
            font-size: 11px;
            color: #666;
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 20px 15px;
            }
            
            .form-row {
                flex-direction: column;
                gap: 15px;
            }
            
            .form-group {
                min-width: 100%;
            }
            
            .button-row, .table-actions {
                flex-direction: column;
            }
            
            button {
                width: 100%;
            }

            .form-header {
                flex-direction: column;
            }

            .toast-container {
                left: 20px;
                right: 20px;
                top: 10px;
            }

            .toast {
                min-width: auto;
                max-width: 100%;
            }
        }