:root {
    --bg-color: #0b0f19;
    --sidebar-bg: #111827;
    --card-bg: #1f2937;
    --card-hover: #374151;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --accent-color: #10b981;
    --accent-hover: #059669;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --warning-color: #f59e0b;
    --border-color: #374151;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --transition: all 0.3s ease;
}

[data-theme="light"] {
    --bg-color: #f3f4f6;
    --sidebar-bg: #ffffff;
    --card-bg: #ffffff;
    --card-hover: #f9fafb;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --border-color: #e5e7eb;
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text-primary);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
}

.nav-links {
    list-style: none;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-weight: 500;
}

.nav-item:hover, .nav-item.active {
    background-color: var(--card-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--accent-color);
    border-left: 3px solid var(--accent-color);
}

.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 2rem;
    width: calc(100% - 250px);
    padding-bottom: 2rem;
}

.mobile-header {
    display: none;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background-color: var(--sidebar-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 90;
}

.mobile-menu-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bottom-nav {
    display: none;
}

.page-section {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

.page-section.active {
    display: block;
}

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

h2 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.5rem; }
h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 1rem; }
.subtitle { color: var(--text-secondary); font-size: 1rem; }
.text-danger { color: var(--danger-color) !important; }
.text-success { color: var(--accent-color) !important; }
.w-100 { width: 100%; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.2);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background-color: var(--card-hover);
    border-color: var(--text-secondary);
}

.btn-danger {
    background-color: var(--danger-color);
    color: #fff;
}

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

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.card {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 255, 255, 0.1);
}

.card-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.hero-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2rem;
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.summary-card {
    display: flex;
    flex-direction: column;
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background-color: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.income .card-icon { color: var(--accent-color); background-color: rgba(16, 185, 129, 0.1); }
.expense .card-icon { color: var(--danger-color); background-color: rgba(239, 68, 68, 0.1); }
.balance .card-icon { color: #3b82f6; background-color: rgba(59, 130, 246, 0.1); }
.savings .card-icon { color: #8b5cf6; background-color: rgba(139, 92, 246, 0.1); }

.card-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.card-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.insights-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.insights-list li {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.insights-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.insight-icon {
    color: var(--warning-color);
    flex-shrink: 0;
}

.table-responsive {
    overflow-x: auto;
}

.tx-table {
    width: 100%;
    border-collapse: collapse;
}

.tx-table th, .tx-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.tx-table th {
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.tx-table tbody tr {
    transition: var(--transition);
}

.tx-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge.income { background-color: rgba(16, 185, 129, 0.1); color: var(--accent-color); }
.badge.expense { background-color: rgba(239, 68, 68, 0.1); color: var(--danger-color); }

.tx-actions {
    display: flex;
    gap: 0.5rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.filters-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-box svg {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-box input {
    width: 100%;
    padding: 0.625rem 1rem 0.625rem 2.5rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    outline: none;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--accent-color);
}

.filter-group {
    display: flex;
    gap: 1rem;
}

.form-select {
    padding: 0.625rem 1rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    outline: none;
    cursor: pointer;
}

.budget-overview {
    margin-bottom: 2rem;
}

.budget-summary {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.budget-summary .label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.progress-container {
    width: 100%;
}

.progress-bar-bg {
    width: 100%;
    height: 8px;
    background-color: var(--bg-color);
    border-radius: 9999px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-bar-fill {
    height: 100%;
    background-color: var(--accent-color);
    border-radius: 9999px;
    transition: width 0.5s ease;
}

.progress-bar-fill.warning { background-color: var(--warning-color); }
.progress-bar-fill.danger { background-color: var(--danger-color); }

.progress-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: right;
}

.category-budgets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.cat-budget-card {
    padding: 1rem;
    background-color: var(--bg-color);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.cat-budget-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    align-items: center;
}

.goals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.goal-card {
    position: relative;
    overflow: hidden;
}

.goal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.goal-target {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-color);
}

.goal-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.chart-container {
    position: relative;
    width: 100%;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.setting-desc {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.settings-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--card-bg);
    width: 90%;
    max-width: 500px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    transform: translateY(20px);
    transition: var(--transition);
}

.modal-sm { max-width: 400px; }

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.close-modal {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.modal-body { padding: 1.5rem; }

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

.form-group { margin-bottom: 1.25rem; }

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    outline: none;
    transition: var(--transition);
}

.form-input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.radio-group {
    display: flex;
    gap: 1.5rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--accent-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    z-index: 1010;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

@media (max-width: 1024px) {
    .dashboard-grid { grid-template-columns: 1fr; }
    .action-buttons { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
    .sidebar { display: none; }     .main-content { margin-left: 0; width: 100%; padding: 1rem; padding-bottom: 5rem; }
    .mobile-header { display: flex; }
    
        .bottom-nav {
        display: flex;
        justify-content: space-between;
        align-items: center;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background-color: var(--sidebar-bg);
        border-top: 1px solid var(--border-color);
        padding: 0.5rem 1rem;
        padding-bottom: env(safe-area-inset-bottom, 0.5rem);
        z-index: 100;
        box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.1);
    }
    
    .bottom-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.25rem;
        color: var(--text-secondary);
        text-decoration: none;
        font-size: 0.7rem;
        font-weight: 500;
        flex: 1;
    }
    
    .bottom-nav-item.active {
        color: var(--accent-color);
    }
    
    .bottom-nav-item svg {
        width: 20px;
        height: 20px;
    }
    
    .bottom-nav-fab-container {
        flex: 1;
        display: flex;
        justify-content: center;
    }
    
    .bottom-nav-fab {
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background-color: var(--accent-color);
        color: white;
        border: none;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 4px 10px rgba(16, 185, 129, 0.4);
        transform: translateY(-15px);
        cursor: pointer;
    }

    .hero-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
    #btn-add-tx-main { display: none; }     #btn-add-tx-page { display: none; }
    
    .action-buttons { grid-template-columns: 1fr 1fr; }
    .filters-container { flex-direction: column; align-items: stretch; }
    .filter-group { flex-direction: column; }
    
    .tx-table th, .tx-table td { padding: 0.75rem 0.5rem; font-size: 0.8rem; }
    .tx-actions { flex-direction: row; gap: 0.25rem; }
    
        .form-input, .form-select {
        font-size: 16px; 
    }
}

@media (max-width: 480px) {
    .summary-cards { grid-template-columns: 1fr; }
    .action-buttons { grid-template-columns: 1fr; }
    .analytics-grid { grid-template-columns: 1fr; }
}