:root {
            --primary: #4361ee;
            --secondary: #3a0ca3;
            --success: #4cc9f0;
            --danger: #f72585;
            --warning: #fca311;
            --dark: #14213d;
            --light: #f8f9fa;
            --gray: #e5e5e5;
            --dark-bg: #1a1c2c;
            --card-dark: #242635;
            --border-radius: 12px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

        [data-theme="light"] {
            --dark-bg: #f0f2f5;
            --card-dark: #ffffff;
            --light: #1a1c2c;
            --gray: #d1d1d1;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: var(--dark-bg);
            color: var(--light);
            line-height: 1.6;
            padding-bottom: 70px;
            min-height: 100vh;
            position: relative;
            transition: var(--transition);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            margin-bottom: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--success);
        }

        .logo i {
            color: var(--primary);
        }

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

        .view {
            display: none;
            animation: fadeIn 0.3s ease;
        }

        .view.active {
            display: block;
        }

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

        .card {
            background: var(--card-dark);
            border-radius: var(--border-radius);
            padding: 20px;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            margin-bottom: 20px;
        }

        .card:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
        }

        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        }

        .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--light);
        }

        .stats {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin-bottom: 20px;
        }

        .stat-card {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            border-radius: var(--border-radius);
            padding: 15px;
            text-align: center;
        }

        .stat-card.income {
            background: linear-gradient(135deg, #4cc9f0, #4895ef);
        }

        .stat-card.expenses {
            background: linear-gradient(135deg, #f72585, #b5179e);
        }

        .stat-card i {
            font-size: 24px;
            margin-bottom: 10px;
        }

        .stat-value {
            font-size: 22px;
            font-weight: 700;
            margin: 5px 0;
        }

        .stat-label {
            font-size: 14px;
            opacity: 0.9;
        }

        .form-group {
            margin-bottom: 15px;
        }

        .form-group label {
            display: block;
            margin-bottom: 5px;
            font-weight: 500;
            color: var(--light);
        }

        .form-control {
            width: 100%;
            padding: 12px 15px;
            background: rgba(0, 0, 0, 0.05);
            border: 1px solid rgba(0, 0, 0, 0.1);
            border-radius: var(--border-radius);
            font-size: 16px;
            color: var(--light);
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }

        .btn {
            padding: 12px 20px;
            border: none;
            border-radius: var(--border-radius);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

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

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

        .btn-block {
            width: 100%;
        }

        .transaction-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px;
            border-bottom: 1px solid rgba(0, 0, 0, 0.1);
            transition: var(--transition);
        }

        .transaction-item:hover {
            background: rgba(0, 0, 0, 0.03);
        }

        .transaction-info {
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .transaction-title {
            font-weight: 600;
            margin-bottom: 5px;
        }

        .transaction-date {
            font-size: 12px;
            color: #888;
        }

        .transaction-amount {
            font-weight: 700;
            margin: 0 10px;
        }

        .income-amount {
            color: #4cc9f0;
        }

        .expense-amount {
            color: #f72585;
        }

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

        .action-btn {
            background: none;
            border: none;
            color: #888;
            cursor: pointer;
            transition: var(--transition);
        }

        .action-btn:hover {
            color: var(--primary);
        }

        .action-btn.delete:hover {
            color: var(--danger);
        }

        .chart-container {
            position: relative;
            height: 250px;
            margin-top: 10px;
        }

        .empty-state {
            text-align: center;
            padding: 30px;
            color: #888;
        }

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

        .filter-options {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
        }

        .filter-btn {
            padding: 8px 15px;
            border: 1px solid rgba(0, 0, 0, 0.1);
            background: rgba(0, 0, 0, 0.05);
            color: var(--light);
            border-radius: var(--border-radius);
            cursor: pointer;
            transition: var(--transition);
        }

        .filter-btn.active {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
        }

        .nav-footer {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--card-dark);
            box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.2);
            z-index: 100;
        }

        .nav-tabs {
            display: flex;
            justify-content: space-around;
            padding: 10px 0;
        }

        .nav-tab {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 10px 15px;
            color: #888;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            background: transparent;
        }

        .nav-tab.active {
            color: var(--primary);
        }

        .nav-tab i {
            font-size: 20px;
            margin-bottom: 5px;
        }

        .nav-tab span {
            font-size: 12px;
        }

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

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

        .settings-option {
            padding: 15px 0;
            border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        }

        .settings-option:last-child {
            border-bottom: none;
        }

        .switch {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 24px;
            float: right;
        }

        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
            border-radius: 24px;
        }

        .slider:before {
            position: absolute;
            content: "";
            height: 16px;
            width: 16px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }

        input:checked + .slider {
            background-color: var(--primary);
        }

        input:checked + .slider:before {
            transform: translateX(26px);
        }

        .search-bar {
            display: flex;
            margin-bottom: 20px;
        }

        .search-bar input {
            flex: 1;
            margin-right: 10px;
        }

        .theme-btn {
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--light);
        }

        .currency-info {
            font-size: 12px;
            color: #888;
            margin-top: 5px;
        }