/* ==========================================
   CSS Variables & Theme - Glassmorphism Style
   ========================================== */
:root {
    /* Light Theme (default) */
    --bg-primary: #f0f4f8;
    --bg-secondary: rgba(255, 255, 255, 0.7);
    --bg-tertiary: rgba(241, 245, 249, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.25);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.3);
    --border-glass: rgba(255, 255, 255, 0.5);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.15);

    /* Accent Colors */
    --primary: #8b5cf6;
    --primary-hover: #7c3aed;
    --primary-glow: rgba(139, 92, 246, 0.4);
    --income: #10b981;
    --income-bg: rgba(16, 185, 129, 0.15);
    --expense: #ef4444;
    --expense-bg: rgba(239, 68, 68, 0.15);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.15);

    /* Spacing */
    --sidebar-width: 260px;
    --header-height: 70px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    /* Blur */
    --blur-sm: 8px;
    --blur-md: 16px;
    --blur-lg: 24px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-primary: #0a0a1a;
    --bg-secondary: rgba(30, 30, 50, 0.6);
    --bg-tertiary: rgba(45, 45, 70, 0.5);
    --bg-glass: rgba(30, 30, 50, 0.4);
    --text-primary: #f1f5f9;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glass: rgba(255, 255, 255, 0.12);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 60px rgba(139, 92, 246, 0.3);

    --income-bg: rgba(16, 185, 129, 0.2);
    --expense-bg: rgba(239, 68, 68, 0.2);
    --warning-bg: rgba(245, 158, 11, 0.2);
}

/* ==========================================
   Reset & Base Styles
   ========================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Fondo con degradado difuminado */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -20%;
    width: 70%;
    height: 70%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.35) 0%, transparent 60%);
    filter: blur(80px);
    z-index: -1;
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    bottom: -30%;
    right: -20%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.25) 0%, transparent 60%);
    filter: blur(80px);
    z-index: -1;
    pointer-events: none;
}

[data-theme="dark"] body::before {
    background: radial-gradient(circle, rgba(139, 92, 246, 0.4) 0%, transparent 55%);
    filter: blur(100px);
}

[data-theme="dark"] body::after {
    background: radial-gradient(circle, rgba(79, 70, 229, 0.3) 0%, transparent 55%);
    filter: blur(100px);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-hover);
}

/* ==========================================
   App Layout
   ========================================== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ==========================================
   Sidebar - Glassmorphism
   ========================================== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    backdrop-filter: blur(var(--blur-lg));
    -webkit-backdrop-filter: blur(var(--blur-lg));
    border-right: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    transition: transform var(--transition-normal);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo svg {
    width: 32px;
    height: 32px;
    color: var(--primary);
    filter: drop-shadow(0 0 8px var(--primary-glow));
}

.logo span {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.nav-menu {
    list-style: none;
    padding: 16px 12px;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
    margin-bottom: 4px;
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-glow), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.nav-item:hover::before {
    opacity: 0.3;
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    box-shadow: 0 4px 16px var(--primary-glow);
}

.nav-item.active::before {
    opacity: 0;
}

.nav-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.nav-item span {
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    z-index: 1;
}

.theme-toggle {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

.theme-toggle button {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur-sm));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.theme-toggle button:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--primary);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.moon-icon {
    display: none;
}

[data-theme="dark"] .sun-icon {
    display: none;
}

[data-theme="dark"] .moon-icon {
    display: block;
}

/* ==========================================
   Main Content
   ========================================== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 32px;
    min-height: 100vh;
}

.view {
    display: none;
    animation: fadeIn var(--transition-normal);
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.view-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
}

.view-header h1 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

/* ==========================================
   Buttons - Glassmorphism
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--primary-glow);
}

.btn-secondary {
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur-sm));
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
}

.btn-danger {
    background: linear-gradient(135deg, var(--expense), #dc2626);
    color: white;
    box-shadow: 0 4px 16px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(239, 68, 68, 0.4);
}

/* ==========================================
   Cards - Glassmorphism
   ========================================== */
.card {
    background: var(--bg-secondary);
    backdrop-filter: blur(var(--blur-lg));
    -webkit-backdrop-filter: blur(var(--blur-lg));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 24px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transform: translateY(-2px);
}

.card h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.card-header h3 {
    margin-bottom: 0;
}

/* ==========================================
   Dashboard
   ========================================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.summary-card {
    display: flex;
    align-items: center;
    gap: 16px;
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.card-icon::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: inherit;
    filter: blur(12px);
    opacity: 0.5;
    z-index: -1;
}

.card-icon svg {
    width: 26px;
    height: 26px;
}

.summary-card.balance .card-icon {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(139, 92, 246, 0.1));
    color: var(--primary);
}

.summary-card.income .card-icon {
    background: linear-gradient(135deg, var(--income-bg), rgba(16, 185, 129, 0.05));
    color: var(--income);
}

.summary-card.expense .card-icon {
    background: linear-gradient(135deg, var(--expense-bg), rgba(239, 68, 68, 0.05));
    color: var(--expense);
}

.summary-card.budget .card-icon {
    background: linear-gradient(135deg, var(--warning-bg), rgba(245, 158, 11, 0.05));
    color: var(--warning);
}

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

.card-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
    font-weight: 500;
}

.card-value {
    font-size: 1.625rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.budget-progress-card {
    grid-column: span 2;
}

.budget-progress {
    margin-top: 12px;
}

.progress-bar {
    height: 10px;
    background: var(--bg-tertiary);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 10px;
    transition: width var(--transition-normal), background-color var(--transition-normal);
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

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

.progress-fill.danger {
    background: var(--expense);
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.chart-card {
    grid-column: span 2;
    height: 300px;
    max-height: 300px;
    overflow: hidden;
}

.chart-wrapper {
    position: relative;
    width: 100%;
    height: 200px;
    max-height: 200px;
}

.chart-wrapper canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100% !important;
    height: 100% !important;
    max-height: 100% !important;
}

.recent-transactions {
    grid-column: span 4;
}

.transaction-list {
    list-style: none;
}

.transaction-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.transaction-list li:hover {
    padding-left: 8px;
}

.transaction-list li:last-child {
    border-bottom: none;
}

.transaction-list .empty-state {
    justify-content: center;
    color: var(--text-muted);
    padding: 40px;
}

.transaction-info {
    display: flex;
    align-items: center;
    gap: 14px;
}

.transaction-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.transaction-icon.income {
    background: var(--income-bg);
}

.transaction-icon.expense {
    background: var(--expense-bg);
}

.transaction-details {
    display: flex;
    flex-direction: column;
}

.transaction-description {
    font-weight: 600;
    color: var(--text-primary);
}

.transaction-category {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.transaction-amount {
    font-weight: 700;
    font-size: 1rem;
}

.transaction-amount.income {
    color: var(--income);
}

.transaction-amount.expense {
    color: var(--expense);
}

.transaction-date {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-left: 16px;
}

/* ==========================================
   Transactions Table
   ========================================== */
.filters-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--bg-secondary);
    backdrop-filter: blur(var(--blur-lg));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-group label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.filter-group select,
.filter-group input {
    padding: 10px 14px;
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur-sm));
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.filter-group select:focus,
.filter-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

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

.transactions-table th,
.transactions-table td {
    padding: 16px 18px;
    text-align: left;
}

.transactions-table th {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

.transactions-table td {
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.transactions-table tr {
    transition: all var(--transition-fast);
}

.transactions-table tr:hover td {
    background: var(--bg-glass);
}

.transactions-table .empty-row td {
    text-align: center;
    color: var(--text-muted);
    padding: 48px;
}

.transactions-table .amount.income {
    color: var(--income);
    font-weight: 700;
}

.transactions-table .amount.expense {
    color: var(--expense);
    font-weight: 700;
}

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

.action-btn {
    padding: 8px 14px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.action-btn.edit {
    background: rgba(139, 92, 246, 0.15);
    color: var(--primary);
}

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

.action-btn.delete {
    background: var(--expense-bg);
    color: var(--expense);
}

.action-btn.delete:hover {
    background: var(--expense);
    color: white;
    transform: translateY(-1px);
}

/* ==========================================
   Budgets
   ========================================== */
.monthly-budget-card {
    margin-bottom: 28px;
}

.monthly-budget-form {
    display: flex;
    align-items: flex-end;
    gap: 16px;
}

.input-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.input-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.input-group input {
    padding: 12px 18px;
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur-sm));
    color: var(--text-primary);
    font-size: 1rem;
    width: 160px;
    transition: all var(--transition-fast);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.budgets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.budget-card {
    background: var(--bg-secondary);
    backdrop-filter: blur(var(--blur-lg));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 24px;
    transition: all var(--transition-normal);
}

.budget-card:hover {
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transform: translateY(-2px);
}

.budget-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
}

.budget-card-header h4 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.budget-card-header button {
    padding: 8px 14px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.budget-card-header button:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--primary);
}

.budget-amounts {
    display: flex;
    justify-content: space-between;
    margin-top: 14px;
    font-size: 0.875rem;
}

.budget-spent {
    color: var(--text-primary);
    font-weight: 700;
}

.budget-limit {
    color: var(--text-secondary);
}

.budget-alert {
    margin-top: 14px;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 600;
}

.budget-alert.warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.budget-alert.danger {
    background: var(--expense-bg);
    color: var(--expense);
}

/* ==========================================
   Reports
   ========================================== */
.reports-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.chart-card-large {
    height: 400px;
    max-height: 400px;
    overflow: hidden;
}

.chart-card-large .chart-wrapper {
    height: 320px;
    max-height: 320px;
}

.chart-card-full {
    grid-column: span 2;
    height: 340px;
    max-height: 340px;
    overflow: hidden;
}

.chart-card-full .chart-wrapper {
    height: 260px;
    max-height: 260px;
}

.stats-card {
    grid-column: span 2;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    padding: 20px;
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur-sm));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    font-weight: 500;
}

.stat-value {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-value.income {
    color: var(--income);
}

.stat-value.expense {
    color: var(--expense);
}

/* ==========================================
   Settings
   ========================================== */
.settings-grid {
    display: grid;
    gap: 24px;
}

.settings-card p {
    color: var(--text-secondary);
    margin-bottom: 18px;
    line-height: 1.6;
}

.settings-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.settings-card.danger {
    border-color: rgba(239, 68, 68, 0.3);
}

.settings-card.danger h3 {
    color: var(--expense);
}

.file-input-label {
    cursor: pointer;
}

.categories-list h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 18px 0 10px 0;
}

.categories-list h4:first-child {
    margin-top: 0;
}

.categories-list ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.categories-list li {
    padding: 8px 16px;
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur-sm));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--text-primary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.categories-list li:hover {
    transform: translateY(-1px);
    border-color: var(--primary);
}

/* ==========================================
   Modals - Glassmorphism
   ========================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

.modal {
    background: var(--bg-secondary);
    backdrop-filter: blur(var(--blur-lg));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 480px;
    padding: 28px;
    transform: translateY(24px) scale(0.95);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.modal-overlay.active .modal {
    transform: translateY(0) scale(1);
}

.modal-small {
    max-width: 380px;
    text-align: center;
}

.modal-small p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.modal-header h2 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--primary);
}

/* ==========================================
   Forms
   ========================================== */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur-sm));
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.radio-group {
    display: flex;
    gap: 14px;
}

.radio-label {
    flex: 1;
    cursor: pointer;
}

.radio-label input {
    display: none;
}

.radio-custom {
    display: block;
    padding: 14px;
    text-align: center;
    border: 2px solid var(--border-glass);
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all var(--transition-fast);
    background: var(--bg-glass);
}

.radio-label input:checked + .radio-custom.income {
    border-color: var(--income);
    background: var(--income-bg);
    color: var(--income);
}

.radio-label input:checked + .radio-custom.expense {
    border-color: var(--expense);
    background: var(--expense-bg);
    color: var(--expense);
}

.form-actions {
    display: flex;
    gap: 14px;
    justify-content: flex-end;
    margin-top: 28px;
}

/* ==========================================
   Toast Notification
   ========================================== */
.toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-secondary);
    backdrop-filter: blur(var(--blur-lg));
    color: var(--text-primary);
    padding: 16px 28px;
    border-radius: var(--radius-lg);
    font-weight: 600;
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    z-index: 1100;
    opacity: 0;
    transition: all var(--transition-normal);
}

.toast.active {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    background: linear-gradient(135deg, var(--income), #059669);
    border: none;
    color: white;
}

.toast.error {
    background: linear-gradient(135deg, var(--expense), #dc2626);
    border: none;
    color: white;
}

.toast.warning {
    background: linear-gradient(135deg, var(--warning), #d97706);
    border: none;
    color: white;
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 1200px) {
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .recent-transactions {
        grid-column: span 2;
    }

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

@media (max-width: 992px) {
    .reports-grid {
        grid-template-columns: 1fr;
    }

    .chart-card-full {
        grid-column: span 1;
    }

    .stats-card {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 0;
    }

    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 20px;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .budget-progress-card,
    .chart-card,
    .recent-transactions {
        grid-column: span 1;
    }

    .view-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 18px;
    }

    .filters-bar {
        flex-direction: column;
    }

    .filter-group {
        width: 100%;
    }

    .filter-group select,
    .filter-group input {
        flex: 1;
    }

    .transactions-table {
        display: block;
        overflow-x: auto;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .modal {
        margin: 20px;
        max-width: calc(100% - 40px);
    }
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 101;
    width: 48px;
    height: 48px;
    background: var(--bg-secondary);
    backdrop-filter: blur(var(--blur-lg));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.menu-toggle svg {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .view-header {
        margin-top: 60px;
    }
}

/* Overlay for mobile sidebar */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 99;
}

.sidebar-overlay.active {
    display: block;
}

/* ==========================================
   Scrollbar personalizado
   ========================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-glass);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ==========================================
   Seleccion de texto
   ========================================== */
::selection {
    background: var(--primary-glow);
    color: var(--text-primary);
}