* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        :root {
            --primary: #4361ee;
            --primary-dark: #3a56d4;
            --secondary: #7209b7;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
            --success: #4cc9f0;
            --danger: #f72585;
            --warning: #ff9e00;
            --card-bg: #ffffff;
            --shadow: rgba(0, 0, 0, 0.08);
            --border: #e9ecef;
        }

        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            color: var(--dark);
            min-height: 100vh;
        }

        /* ========== ANIMATIONS ========== */
        @keyframes navbarSlideDown {
            from {
                transform: translateY(-100%);
                opacity: 0;
            }
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }

        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(67, 97, 238, 0.4);
            }
            70% {
                box-shadow: 0 0 0 10px rgba(67, 97, 238, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(67, 97, 238, 0);
            }
        }

        @keyframes ripple {
            0% {
                transform: scale(0, 0);
                opacity: 0.5;
            }
            100% {
                transform: scale(20, 20);
                opacity: 0;
            }
        }

        @keyframes dropdownSlideIn {
            from {
                opacity: 0;
                transform: translate(-50%, -40%);
            }
            to {
                opacity: 1;
                transform: translate(-50%, -50%);
            }
        }

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

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes slideInLeft {
            from {
                opacity: 0;
                transform: translateX(-30px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

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

        @keyframes gradientShift {
            0%, 100% {
                background-position: 0% 50%;
            }
            50% {
                background-position: 100% 50%;
            }
        }

        /* ========== NAVBAR STYLES ========== */
        .navbar {
            background: var(--card-bg);
            box-shadow: 0 4px 12px var(--shadow);
            padding: 15px 20px;
            position: sticky;
            top: 0;
            z-index: 100;
            animation: navbarSlideDown 0.5s ease-out;
            transition: all 0.3s ease;
        }

        .navbar.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
            padding: 10px 20px;
        }

        .navbar-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 15px;
            flex-wrap: nowrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
            transition: transform 0.3s ease;
            animation: slideInLeft 0.6s ease-out;
        }

        .logo:hover {
            transform: scale(1.08);
        }

        .logo i {
            color: var(--primary);
            font-size: 24px;
        }

        .logo h1 {
            font-size: 20px;
            font-weight: 700;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            transition: all 0.3s ease;
        }

        .logo:hover h1 {
            background-size: 200% 100%;
            animation: gradientShift 2s ease infinite;
        }

        .navbar-search {
            flex: 0 1 400px;
            min-width: 200px;
            position: relative;
            animation: fadeIn 0.6s ease-out 0.1s both;
        }

        .navbar-search i {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gray);
            font-size: 14px;
        }

        .navbar-search input {
            width: 100%;
            padding: 10px 16px 10px 42px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 14px;
            background: var(--light);
            transition: all 0.3s ease;
        }

        .navbar-search input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1), 0 8px 25px rgba(67, 97, 238, 0.2);
            transform: translateY(-1px);
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 15px;
            animation: fadeIn 0.6s ease-out 0.2s both;
        }

        /* ========== BUTTON STYLES & ANIMATIONS ========== */
        .nav-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 16px;
            background: var(--light);
            color: var(--dark);
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            white-space: nowrap;
            text-decoration: none;
            position: relative;
            overflow: hidden;
        }

        .nav-link:hover {
            background: var(--border);
            transform: translateY(-3px) scale(1.05);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
        }

        .nav-link.active {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
            animation: pulse 2s infinite;
        }

        .nav-link i {
            transition: transform 0.3s ease;
        }

        .nav-link:hover i {
            transform: scale(1.2);
        }

        .nav-link:active {
            transform: translateY(1px);
            transition: all 0.1s ease;
        }

        /* Mobile Menu Button */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 20px;
            color: var(--primary);
            cursor: pointer;
            padding: 5px;
            transition: all 0.3s ease;
            animation: fadeIn 0.6s ease-out;
        }

        .mobile-menu-btn:hover {
            transform: rotate(90deg);
        }

        .mobile-menu-btn.active i {
            transform: rotate(90deg);
        }

        /* ========== DROPDOWN STYLES ========== */
        .dropdown {
            position: relative;
        }

        .dropdown-btn {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 16px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            white-space: nowrap;
            position: relative;
            overflow: hidden;
            animation: pulse 2s infinite;
        }

        .dropdown-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-3px) scale(1.05);
            box-shadow: 0 8px 25px rgba(67, 97, 238, 0.3);
        }

        .dropdown-btn:active {
            transform: translateY(1px);
            transition: all 0.1s ease;
        }

        .dropdown-btn i {
            transition: transform 0.3s ease;
        }

        .dropdown-btn:hover i {
            transform: scale(1.2);
        }

        /* Ripple effect for dropdown button */
        .dropdown-btn::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 5px;
            height: 5px;
            background: rgba(255, 255, 255, 0.5);
            opacity: 0;
            border-radius: 100%;
            transform: scale(1, 1) translate(-50%);
            transform-origin: 50% 50%;
        }

        .dropdown-btn:focus:not(:active)::after {
            animation: ripple 1s ease-out;
        }

        .dropdown-content {
            position: absolute;
            top: calc(100% + 10px);
            left: 0;
            background: var(--card-bg);
            width: 400px;
            max-height: 80vh;
            border-radius: 16px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            padding: 0;
            z-index: 1000;
            display: none;
            overflow: hidden;
            animation: dropdownSlideDown 0.3s ease-out;
        }

        .dropdown.active .dropdown-content {
            display: block;
        }

        .dropdown-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
        }

        .dropdown.active ~ .dropdown-overlay {
            display: block;
        }

        .dropdown-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px;
            background: var(--primary);
            color: white;
        }

        .dropdown-title {
            font-size: 18px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .close-dropdown {
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            padding: 5px;
            line-height: 1;
            transition: transform 0.3s ease;
        }

        .close-dropdown:hover {
            transform: rotate(90deg);
        }

        .dropdown-body {
            padding: 20px;
            overflow-y: auto;
            max-height: calc(80vh - 120px);
        }

        .clear-all-btn {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 16px;
            background: var(--danger);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            white-space: nowrap;
            position: relative;
            overflow: hidden;
            animation: fadeIn 0.6s ease-out 0.3s both;
        }

        .clear-all-btn:hover {
            background: #e11575;
            transform: translateY(-3px) scale(1.05);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
        }

        .clear-all-btn:active {
            transform: translateY(1px);
            transition: all 0.1s ease;
        }

        .clear-all-btn i {
            transition: transform 0.3s ease;
        }

        .clear-all-btn:hover i {
            transform: scale(1.2);
        }

        /* ========== MAIN CONTENT ========== */
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 30px;
            animation: fadeIn 0.8s ease-out;
        }

        /* ========== STATS CARDS ========== */
        .stats-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-bottom: 40px;
            animation: fadeIn 0.8s ease-out 0.2s both;
        }

        .stat-card {
            background: var(--card-bg);
            border-radius: 12px;
            padding: 20px;
            box-shadow: 0 4px 12px var(--shadow);
            display: flex;
            align-items: center;
            gap: 15px;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            animation: scaleIn 0.5s ease-out;
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.7s ease;
        }

        .stat-card:hover::before {
            left: 100%;
        }

        .stat-card:hover {
            transform: translateY(-5px) scale(1.05);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }

        .stat-card:nth-child(1) { animation-delay: 0.3s; }
        .stat-card:nth-child(2) { animation-delay: 0.4s; }
        .stat-card:nth-child(3) { animation-delay: 0.5s; }

        .stat-icon {
            width: 50px;
            height: 50px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .stat-card:hover .stat-icon {
            transform: scale(1.1);
        }

        .stat-icon.total {
            background: rgba(67, 97, 238, 0.1);
            color: var(--primary);
        }

        .stat-icon.open {
            background: rgba(76, 201, 240, 0.1);
            color: var(--success);
        }

        .stat-icon.closed {
            background: rgba(108, 117, 125, 0.1);
            color: var(--gray);
        }

        .stat-info h3 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 5px;
            white-space: nowrap;
            transition: all 0.3s ease;
        }

        .stat-card:hover .stat-info h3 {
            color: var(--primary);
        }

        .stat-info p {
            color: var(--gray);
            font-size: 14px;
            white-space: nowrap;
        }

        /* ========== CUSTOMER ENTRIES ========== */
        .entries-title {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 25px;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 10px;
            animation: fadeIn 0.8s ease-out 0.4s both;
        }

        .entries-title i {
            color: var(--primary);
            transition: transform 0.3s ease;
        }

        .entries-title:hover i {
            transform: rotate(15deg);
        }

        .entries-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 25px;
            margin-bottom: 40px;
        }

        /* ========== CUSTOMER CARD ========== */
        .customer-card {
            background: var(--card-bg);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 12px var(--shadow);
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            animation: fadeIn 0.6s ease-out;
            animation-fill-mode: both;
        }

        .customer-card:nth-child(odd) { animation-delay: 0.1s; }
        .customer-card:nth-child(even) { animation-delay: 0.2s; }

        .customer-card:hover {
            transform: translateY(-8px) scale(1.03);
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
        }

        .customer-header {
            padding: 20px;
            background: var(--primary);
            color: white;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: all 0.3s ease;
        }

        .customer-card:hover .customer-header {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }

        .customer-name {
            font-size: 18px;
            font-weight: 600;
            transition: transform 0.3s ease;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .customer-name:hover {
            white-space: normal;
            overflow: visible;
        }

        .customer-card:hover .customer-name {
            transform: translateX(5px);
        }

        .customer-id {
            font-size: 14px;
            opacity: 0.9;
            margin-top: 3px;
            transition: opacity 0.3s ease;
        }

        .customer-card:hover .customer-id {
            opacity: 1;
        }

        .customer-body {
            padding: 20px;
        }

        .customer-info {
            margin-bottom: 20px;
        }

        .info-row {
            display: flex;
            justify-content: space-between;
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
            transition: border-color 0.3s ease;
        }

        .customer-card:hover .info-row {
            border-color: rgba(67, 97, 238, 0.2);
        }

        .info-label {
            color: var(--gray);
            font-weight: 500;
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .customer-card:hover .info-label {
            color: var(--primary);
        }

        .info-value {
            font-weight: 600;
            font-size: 14px;
            text-align: right;
            max-width: 60%;
            word-break: break-word;
            transition: color 0.3s ease;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .info-value:hover {
            white-space: normal;
            overflow: visible;
        }

        .customer-card:hover .info-value {
            color: var(--primary-dark);
        }

        .status {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .customer-card:hover .status {
            transform: scale(1.1);
        }

        .status-open {
            background: rgba(76, 201, 240, 0.2);
            color: #0a8ea8;
        }

        .status-closed {
            background: rgba(108, 117, 125, 0.2);
            color: var(--gray);
        }

        .status-pending {
            background: rgba(255, 158, 0, 0.2);
            color: #cc7e00;
        }

        .customer-actions {
            display: flex;
            gap: 10px;
        }

        .action-btn {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 10px;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            position: relative;
            overflow: hidden;
        }

        .action-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }

        .action-btn:active {
            transform: translateY(0);
            transition: all 0.1s ease;
        }

        .action-btn i {
            transition: transform 0.3s ease;
        }

        .action-btn:hover i {
            transform: scale(1.2);
        }

        .view-btn {
            background: rgba(76, 201, 240, 0.1);
            color: var(--success);
        }

        .view-btn:hover {
            background: rgba(76, 201, 240, 0.2);
        }

        .edit-btn {
            background: rgba(67, 97, 238, 0.1);
            color: var(--primary);
        }

        .edit-btn:hover {
            background: rgba(67, 97, 238, 0.2);
        }

        .delete-btn {
            background: rgba(247, 37, 133, 0.1);
            color: var(--danger);
        }

        .delete-btn:hover {
            background: rgba(247, 37, 133, 0.2);
        }

        /* ========== FORM STYLES ========== */
        .form-group {
            margin-bottom: 15px;
            animation: fadeIn 0.5s ease-out;
            position: relative;
        }

        .form-group:nth-child(1) { animation-delay: 0.1s; }
        .form-group:nth-child(2) { animation-delay: 0.2s; }
        .form-group:nth-child(3) { animation-delay: 0.3s; }
        .form-group:nth-child(4) { animation-delay: 0.4s; }
        .form-group:nth-child(5) { animation-delay: 0.5s; }
        .form-group:nth-child(6) { animation-delay: 0.6s; }
        .form-group:nth-child(7) { animation-delay: 0.7s; }

        label {
            display: block;
            margin-bottom: 6px;
            font-weight: 500;
            color: var(--dark);
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .form-group:focus-within label {
            color: var(--primary);
        }

        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 14px;
            transition: all 0.3s ease;
            background: var(--light);
        }

        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
            transform: translateY(-1px);
        }

        textarea {
            min-height: 100px;
            resize: vertical;
            transition: min-height 0.3s ease;
        }

        textarea:focus {
            min-height: 120px;
        }

        .form-actions {
            display: flex;
            gap: 12px;
            margin-top: 25px;
            animation: fadeIn 0.5s ease-out 0.8s both;
        }

        .submit-btn {
            flex: 1;
            padding: 12px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            position: relative;
            overflow: hidden;
        }

        .submit-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(67, 97, 238, 0.3);
        }

        .submit-btn:active {
            transform: translateY(1px);
            transition: all 0.1s ease;
        }

        .submit-btn i {
            transition: transform 0.3s ease;
        }

        .submit-btn:hover i {
            transform: scale(1.2);
        }

        .cancel-btn {
            padding: 12px 18px;
            background: var(--light);
            color: var(--gray);
            border: 1px solid var(--border);
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }

        .cancel-btn:hover {
            background: var(--border);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        .cancel-btn:active {
            transform: translateY(1px);
            transition: all 0.1s ease;
        }

        /* ========== EXPORT/IMPORT PAGE ========== */
        .export-page {
            max-width: 1200px;
            margin: 0 auto;
            animation: fadeIn 0.8s ease-out;
        }

        .export-card {
            background: var(--card-bg);
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 6px 20px var(--shadow);
            margin-bottom: 40px;
            animation: scaleIn 0.6s ease-out;
        }

        .export-title {
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 30px;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 12px;
            animation: slideInLeft 0.6s ease-out;
        }

        .export-title i {
            color: var(--primary);
            transition: transform 0.3s ease;
        }

        .export-title:hover i {
            transform: rotate(360deg);
        }

        .export-options {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 25px;
            margin-bottom: 30px;
        }

        .export-option {
            background: var(--light);
            border-radius: 12px;
            padding: 25px;
            border: 2px solid transparent;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            cursor: pointer;
            animation: fadeIn 0.6s ease-out;
            animation-fill-mode: both;
        }

        .export-option:nth-child(1) { animation-delay: 0.1s; }
        .export-option:nth-child(2) { animation-delay: 0.2s; }
        .export-option:nth-child(3) { animation-delay: 0.3s; }
        .export-option:nth-child(4) { animation-delay: 0.4s; }

        .export-option:hover {
            border-color: var(--primary);
            transform: translateY(-8px) scale(1.03);
            box-shadow: 0 25px 50px rgba(67, 97, 238, 0.15);
        }

        .export-option.selected {
            border-color: var(--primary);
            background: rgba(67, 97, 238, 0.05);
            animation: pulse 2s infinite;
        }

        .option-header {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }

        .option-icon {
            width: 50px;
            height: 50px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: white;
            transition: transform 0.3s ease;
        }

        .export-option:hover .option-icon {
            transform: scale(1.1) rotate(5deg);
        }

        .option-icon.export {
            background: var(--success);
        }

        .option-icon.import {
            background: var(--primary);
        }

        .option-icon.backup {
            background: var(--warning);
        }

        .option-icon.restore {
            background: var(--danger);
        }

        .option-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--dark);
            transition: color 0.3s ease;
        }

        .export-option:hover .option-title {
            color: var(--primary);
        }

        .option-description {
            font-size: 15px;
            color: var(--gray);
            line-height: 1.5;
            margin-bottom: 20px;
        }

        .option-details {
            font-size: 13px;
            color: var(--gray);
            background: rgba(108, 117, 125, 0.05);
            padding: 12px;
            border-radius: 8px;
            margin-top: 15px;
            transition: all 0.3s ease;
        }

        .export-option:hover .option-details {
            background: rgba(108, 117, 125, 0.1);
        }

        .option-actions {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }

        .option-btn {
            flex: 1;
            padding: 12px;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            position: relative;
            overflow: hidden;
        }

        .option-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
        }

        .option-btn:active {
            transform: translateY(1px);
            transition: all 0.1s ease;
        }

        .option-btn i {
            transition: transform 0.3s ease;
        }

        .option-btn:hover i {
            transform: scale(1.2);
        }

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

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

        .backup-btn {
            background: var(--warning);
            color: white;
        }

        .restore-btn {
            background: var(--danger);
            color: white;
        }

        .file-input-wrapper {
            position: relative;
            overflow: hidden;
            display: inline-block;
            width: 100%;
        }

        .file-input {
            position: absolute;
            left: 0;
            top: 0;
            opacity: 0;
            width: 100%;
            height: 100%;
            cursor: pointer;
        }

        .file-label {
            display: block;
            padding: 15px;
            background: var(--light);
            border: 2px dashed var(--border);
            border-radius: 8px;
            text-align: center;
            cursor: pointer;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }

        .file-label:hover {
            border-color: var(--primary);
            background: rgba(67, 97, 238, 0.05);
            transform: translateY(-3px);
            border-width: 3px;
        }

        .file-label i {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 10px;
            transition: transform 0.3s ease;
        }

        .file-label:hover i {
            transform: scale(1.2) rotate(10deg);
        }

        .file-label span {
            display: block;
            font-size: 14px;
            color: var(--gray);
        }

        .file-name {
            font-size: 13px;
            color: var(--success);
            margin-top: 5px;
            font-weight: 600;
            transition: color 0.3s ease;
        }

        .file-label:hover .file-name {
            color: var(--primary);
        }

        .backup-info-box {
            background: rgba(76, 201, 240, 0.1);
            border-left: 4px solid var(--success);
            padding: 20px;
            margin: 20px 0;
            border-radius: 8px;
            animation: fadeIn 0.6s ease-out 0.5s both;
            transition: all 0.3s ease;
        }

        .backup-info-box:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(76, 201, 240, 0.15);
        }

        .backup-info-box h4 {
            color: var(--success);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: color 0.3s ease;
        }

        .backup-info-box:hover h4 {
            color: var(--primary);
        }

        .backup-info-box h4 i {
            transition: transform 0.3s ease;
        }

        .backup-info-box:hover h4 i {
            transform: rotate(15deg);
        }

        /* ========== PAGE CONTENT ========== */
        .page-content {
            display: none;
            opacity: 0;
            transform: translateY(20px);
            transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .page-content.active {
            display: block;
            opacity: 1;
            transform: translateY(0);
        }

        /* ========== EMPTY STATE ========== */
        .empty-state {
            text-align: center;
            padding: 60px 20px;
            color: var(--gray);
            grid-column: 1 / -1;
            animation: fadeIn 0.8s ease-out;
        }

        .empty-state i {
            font-size: 64px;
            margin-bottom: 15px;
            color: var(--border);
            transition: transform 0.6s ease, color 0.3s ease;
            animation: pulse 2s infinite;
        }

        .empty-state:hover i {
            transform: scale(1.1) rotate(360deg);
            color: var(--primary);
        }

        .empty-state h3 {
            font-size: 22px;
            margin-bottom: 10px;
            transition: color 0.3s ease;
        }

        .empty-state:hover h3 {
            color: var(--primary);
        }

        .empty-state p {
            font-size: 16px;
            max-width: 400px;
            margin: 0 auto;
        }

        /* ========== MODAL ========== */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1000;
            align-items: center;
            justify-content: center;
            padding: 20px;
            animation: fadeIn 0.3s ease-out;
        }

        .modal.active {
            display: flex;
        }

        .modal-content {
            background: white;
            border-radius: 16px;
            width: 90%;
            max-width: 500px;
            max-height: 85vh;
            overflow-y: auto;
            padding: 0;
            animation: scaleIn 0.3s ease-out;
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px;
            background: var(--primary);
            color: white;
            transition: background 0.3s ease;
        }

        .modal:hover .modal-header {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }

        .modal-title {
            font-size: 18px;
            font-weight: 600;
            transition: transform 0.3s ease;
        }

        .modal:hover .modal-title {
            transform: translateX(5px);
        }

        .close-modal {
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: white;
            transition: all 0.3s ease;
            line-height: 1;
            padding: 5px;
        }

        .close-modal:hover {
            color: var(--danger);
            transform: rotate(90deg) scale(1.1);
        }

        .modal-body {
            padding: 25px;
        }

        .customer-details p {
            margin-bottom: 15px;
            line-height: 1.5;
            font-size: 15px;
            transition: transform 0.3s ease;
            animation: fadeIn 0.5s ease-out;
            animation-fill-mode: both;
        }

        .customer-details p:nth-child(1) { animation-delay: 0.1s; }
        .customer-details p:nth-child(2) { animation-delay: 0.2s; }
        .customer-details p:nth-child(3) { animation-delay: 0.3s; }
        .customer-details p:nth-child(4) { animation-delay: 0.4s; }
        .customer-details p:nth-child(5) { animation-delay: 0.5s; }
        .customer-details p:nth-child(6) { animation-delay: 0.6s; }
        .customer-details p:nth-child(7) { animation-delay: 0.7s; }

        .detail-label {
            font-weight: 600;
            color: var(--gray);
            margin-right: 8px;
            transition: color 0.3s ease;
        }

        .modal:hover .detail-label {
            color: var(--primary);
        }

        /* ========== TOAST ========== */
        .toast {
            position: fixed;
            bottom: 30px;
            right: 30px;
            max-width: 450px;
            padding: 15px 25px;
            border-radius: 8px;
            color: white;
            font-weight: 600;
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
            z-index: 1001;
            display: flex;
            align-items: center;
            gap: 10px;
            transform: translateY(100px);
            opacity: 0;
            transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            animation: slideInLeft 0.5s ease-out;
        }

        .toast.show {
            transform: translateY(0);
            opacity: 1;
        }

        .toast i {
            font-size: 20px;
            animation: pulse 2s infinite;
        }

        .toast-success {
            background: var(--success);
        }

        .toast-error {
            background: var(--danger);
        }

        /* ========== FOOTER ========== */
        footer {
            text-align: center;
            padding: 20px;
            color: var(--gray);
            font-size: 12px;
            border-top: 1px solid var(--border);
            margin-top: 20px;
            animation: fadeIn 0.8s ease-out 0.6s both;
            transition: all 0.3s ease;
        }

        footer:hover {
            color: var(--primary);
            border-color: var(--primary);
        }

        /* ========== SCROLLBAR STYLING ========== */
        ::-webkit-scrollbar {
            width: 10px;
            height: 10px;
        }

        ::-webkit-scrollbar-track {
            background: var(--border);
            border-radius: 10px;
        }

        ::-webkit-scrollbar-thumb {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
        }

        /* ========== MOBILE RESPONSIVE ========== */
        @media (max-width: 1200px) {
            .navbar-container {
                gap: 20px;
            }
            
            .entries-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
                gap: 20px;
            }
            
            .export-options {
                gap: 20px;
            }
        }

        @media (max-width: 992px) {
            .stats-container {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .export-options {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .navbar {
                padding: 12px 15px;
            }
            
            .navbar-container {
                flex-wrap: wrap;
                gap: 10px;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .navbar-actions {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 10px;
                margin-top: 15px;
                animation: slideInLeft 0.3s ease-out;
            }
            
            .navbar-actions.active {
                display: flex;
            }
            
            .navbar-search {
                order: 3;
                flex: 1 0 100%;
                min-width: 100%;
                margin-top: 15px;
            }
            
            .dropdown-content {
                position: fixed;
                top: 50%;
                left: 50%;
                transform: translate(-50%, -50%);
                width: 95%;
                max-height: 85vh;
                animation: dropdownSlideIn 0.3s ease-out;
            }
            
            .dropdown-body {
                max-height: calc(85vh - 120px);
            }
            
            .dropdown-btn, .clear-all-btn, .nav-link {
                width: 100%;
                justify-content: center;
            }
            
            .logo h1 {
                font-size: 18px;
            }
            
            .container {
                padding: 20px 15px;
            }
            
            .stats-container {
                display: flex;
                overflow-x: auto;
                padding-bottom: 10px;
                scrollbar-width: thin;
                grid-template-columns: none;
            }
            
            .stat-card {
                min-width: 160px;
                padding: 15px;
                gap: 10px;
                flex-shrink: 0;
            }
            
            .stat-icon {
                width: 40px;
                height: 40px;
                font-size: 18px;
            }
            
            .stat-info h3 {
                font-size: 20px;
            }
            
            .stat-info p {
                font-size: 12px;
            }
            
            .entries-grid {
                grid-template-columns: 1fr;
                gap: 15px;
            }
            
            .entries-title {
                font-size: 20px;
            }
            
            .customer-card {
                margin-bottom: 0;
            }
            
            .customer-header {
                padding: 15px;
            }
            
            .customer-body {
                padding: 15px;
            }
            
            .customer-name {
                font-size: 16px;
            }
            
            .customer-id {
                font-size: 12px;
            }
            
            .info-label, .info-value {
                font-size: 13px;
            }
            
            .action-btn {
                padding: 8px;
                font-size: 12px;
            }
            
            .export-card {
                padding: 20px;
            }
            
            .export-title {
                font-size: 22px;
                margin-bottom: 20px;
            }
            
            .export-option {
                padding: 20px;
            }
            
            .option-header {
                flex-direction: column;
                text-align: center;
                gap: 10px;
                margin-bottom: 15px;
            }
            
            .option-title {
                font-size: 18px;
            }
            
            .option-description {
                font-size: 14px;
                text-align: center;
                margin-bottom: 15px;
            }
            
            .option-actions {
                flex-direction: column;
                margin-top: 15px;
            }
            
            .option-btn {
                padding: 10px;
                font-size: 14px;
            }
            
            .file-label {
                padding: 12px;
            }
            
            .file-label i {
                font-size: 24px;
            }
            
            .toast {
                left: 20px;
                right: 20px;
                max-width: none;
                bottom: 20px;
                padding: 12px 20px;
            }
            
            .btn-text {
                display: none;
            }
            
            .nav-link, .dropdown-btn, .clear-all-btn {
                padding: 10px;
                min-width: auto;
            }
            
            .nav-link i, .dropdown-btn i, .clear-all-btn i {
                margin: 0;
            }
        }

        @media (max-width: 480px) {
            .stats-container {
                grid-template-columns: 1fr;
            }
            
            .stat-card {
                min-width: 140px;
                padding: 12px;
            }
            
            .stat-info h3 {
                font-size: 18px;
            }
            
            .stats-container {
                gap: 10px;
            }
            
            .container {
                padding: 15px;
            }
            
            .customer-card {
                margin-bottom: 10px;
            }
            
            .dropdown-content {
                width: 90%;
                max-height: 80vh;
            }
            
            .dropdown-body {
                max-height: calc(80vh - 120px);
            }
            
            .export-card {
                padding: 15px;
            }
            
            .export-title {
                font-size: 20px;
            }
            
            .export-option {
                padding: 15px;
            }
            
            .option-title {
                font-size: 16px;
            }
            
            .option-description {
                font-size: 13px;
            }
        }

        /* Large Desktop Screens */
        @media (min-width: 1600px) {
            .navbar-container {
                gap: 40px;
            }
            
            .navbar-search {
                flex: 0 1 500px;
            }
            
            .entries-grid {
                grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
                gap: 30px;
            }
            
            .stats-container {
                grid-template-columns: repeat(4, 1fr);
            }
            
            .stat-card {
                padding: 25px;
            }
            
            .stat-info h3 {
                font-size: 32px;
            }
            
            .stat-info p {
                font-size: 15px;
            }
        }

        /* Ultra Wide Screens */
        @media (min-width: 2000px) {
            .container {
                max-width: 1800px;
            }
            
            .entries-grid {
                grid-template-columns: repeat(auto-fill, minmax(450px, 1fr));
                gap: 35px;
            }
            
            .customer-card {
                border-radius: 20px;
            }
            
            .customer-header {
                padding: 25px;
            }
            
            .customer-body {
                padding: 25px;
            }
            
            .customer-name {
                font-size: 20px;
            }
            
            .info-label, .info-value {
                font-size: 16px;
            }
        }