/* ============================================
   ExpenseBuddy.io - Modern UI Theme
   Colors inspired by the dollar bill mascot
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    /* Primary Brand Colors - Money Green Theme */
    --eb-primary: #22c55e;
    --eb-primary-light: #4ade80;
    --eb-primary-dark: #16a34a;
    --eb-primary-glow: rgba(34, 197, 94, 0.3);
    
    /* Secondary Accent */
    --eb-accent: #0ea5e9;
    --eb-accent-light: #38bdf8;
    
    /* Semantic Colors */
    --eb-success: #10b981;
    --eb-warning: #f59e0b;
    --eb-danger: #ef4444;
    --eb-info: #6366f1;
    
    /* Refund Color */
    --eb-refund: #8b5cf6;
    
    /* Light Mode Colors */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-sidebar: #0f172a;
    --bg-sidebar-hover: #1e293b;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;
    
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px var(--eb-primary-glow);
    
    /* Sidebar Width */
    --sidebar-width: 280px;
    --sidebar-collapsed: 0px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-sidebar: #020617;
    --bg-sidebar-hover: #0f172a;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --text-inverse: #0f172a;
    
    --border-color: #334155;
    --border-light: #1e293b;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color var(--transition-base), color var(--transition-base);
    overflow-x: hidden;
}

/* ============================================
   Layout - Sidebar & Main Content
   ============================================ */
.app-wrapper {
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
    width: 100%;
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    color: var(--text-inverse);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-base);
    overflow-y: auto;
}

.sidebar-header {
    height: 77px;
    padding: 0.75rem 1rem;
    background: white;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-logo {
    width: 100%;
    height: 100%;
    max-height: 55px;
    object-fit: contain;
    display: block;
}

.sidebar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-inverse);
    text-decoration: none;
}

.sidebar-brand span {
    color: var(--eb-primary);
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 0;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    padding: 0 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.875rem 1.5rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background: var(--bg-sidebar-hover);
    color: var(--text-inverse);
}

.nav-link.active {
    background: var(--bg-sidebar-hover);
    color: var(--eb-primary);
    border-left-color: var(--eb-primary);
}

.nav-link svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    cursor: pointer;
}

.theme-toggle-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

.theme-toggle-switch {
    width: 44px;
    height: 24px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    position: relative;
    transition: background var(--transition-fast);
}

.theme-toggle-switch::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    top: 3px;
    left: 3px;
    transition: transform var(--transition-fast);
}

[data-theme="dark"] .theme-toggle-switch {
    background: var(--eb-primary);
}

[data-theme="dark"] .theme-toggle-switch::after {
    transform: translateX(20px);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--transition-base);
    overflow-x: hidden;
    max-width: 100vw;
}

/* Top Header */
.top-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    height: 75px;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    backdrop-filter: blur(10px);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
    overflow: hidden;
    min-width: 0;
}

.header-logo {
    height: 55px;
    width: auto;
    object-fit: contain;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

.hamburger svg {
    width: 24px;
    height: 24px;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
}

.header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 1rem;
}

/* Page Content */
.page-content {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    overflow-x: auto;
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-fast), transform var(--transition-fast);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 1.5rem;
}

/* Stat Cards */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: all var(--transition-fast);
}

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

.stat-icon {
    width: auto;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon.primary {
    background: linear-gradient(135deg, var(--eb-primary), var(--eb-primary-dark));
    color: white;
}

.stat-icon.accent {
    background: linear-gradient(135deg, var(--eb-accent), #0284c7);
    color: white;
}

.stat-icon.warning {
    background: linear-gradient(135deg, var(--eb-warning), #d97706);
    color: white;
}

.stat-icon.success {
    background: linear-gradient(135deg, var(--eb-success), #059669);
    color: white;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-change {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: 0.25rem;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
}

.stat-change.positive {
    background: rgba(16, 185, 129, 0.1);
    color: var(--eb-success);
}

.stat-change.negative {
    background: rgba(239, 68, 68, 0.1);
    color: var(--eb-danger);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--eb-primary), var(--eb-primary-dark));
    color: white;
    box-shadow: 0 4px 14px var(--eb-primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--eb-primary-glow);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-danger {
    background: linear-gradient(135deg, var(--eb-danger), #dc2626);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.3);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--eb-primary);
    color: var(--eb-primary);
}

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

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 10px;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* ============================================
   Forms
   ============================================ */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: inherit;
    font-size: 0.9375rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--eb-primary);
    box-shadow: 0 0 0 4px var(--eb-primary-glow);
}

.form-control::placeholder {
    color: var(--text-muted);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 3rem;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.input-group {
    display: flex;
    gap: 0.5rem;
}

.input-group .form-control {
    flex: 1;
}

/* Amount Input with Currency */
.amount-input-wrapper {
    position: relative;
}

.amount-input-wrapper .currency-symbol {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-weight: 600;
}

.amount-input-wrapper .form-control {
    padding-left: 2rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
}

/* Refund indicator */
.amount-refund {
    color: var(--eb-refund) !important;
}

/* ============================================
   Tables
   ============================================ */
.table-container,
.table-responsive-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

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

.table th,
.table td {
    padding: 1rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: var(--bg-tertiary);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

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

.table tbody tr:hover {
    background: var(--bg-tertiary);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

.table tfoot {
    background: var(--bg-tertiary);
}

.table tfoot th,
.table tfoot td {
    font-weight: 700;
    border-bottom: none;
}

/* Expenses Table Column Widths */
.expenses-table .col-actions { width: 80px; white-space: nowrap; }
.expenses-table .col-date { width: 100px; white-space: nowrap; }
.expenses-table .col-category { width: 140px; }
.expenses-table .col-description { min-width: 150px; }
.expenses-table .col-amount { width: 100px; text-align: right; white-space: nowrap; }

/* Amount styling */
.amount-positive {
    color: var(--eb-danger);
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
}

.amount-negative {
    color: var(--eb-refund);
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
}

.amount-negative::before {
    content: '';
}

/* Category Badge */
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ============================================
   Modals
   ============================================ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-backdrop.show {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    background: var(--bg-card);
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    z-index: 2001;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

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

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--eb-danger);
    color: white;
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    max-height: calc(90vh - 180px);
}

.modal-footer {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* ============================================
   Calculator Modal
   ============================================ */
.calculator {
    background: var(--bg-tertiary);
    border-radius: 16px;
    padding: 1rem;
}

.calc-display {
    background: var(--bg-primary);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    text-align: right;
}

.calc-expression {
    font-size: 0.875rem;
    color: var(--text-muted);
    min-height: 1.25rem;
}

.calc-result {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.calc-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.calc-btn {
    padding: 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    font-weight: 600;
    background: var(--bg-secondary);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-primary);
}

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

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

.calc-btn.operator:hover {
    background: var(--eb-primary-dark);
}

.calc-btn.clear {
    background: var(--eb-danger);
    color: white;
}

.calc-btn.equals {
    background: var(--eb-accent);
    color: white;
}

.calc-btn.use-result {
    grid-column: span 4;
    background: linear-gradient(135deg, var(--eb-primary), var(--eb-primary-dark));
    color: white;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

/* ============================================
   Search & Filters
   ============================================ */
.filters-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.search-input {
    position: relative;
    flex: 1;
    min-width: 200px;
}

.search-input svg {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

.search-input .form-control {
    padding-left: 2.75rem;
}

/* ============================================
   Progress Bars (for Report)
   ============================================ */
.progress-bar-container {
    height: 12px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    overflow: hidden;
    position: relative;
}

.progress-bar-fill {
    height: 100%;
    border-radius: 6px;
    transition: width var(--transition-slow);
    background: linear-gradient(90deg, var(--eb-primary), var(--eb-primary-light));
}

.progress-bar-fill.danger {
    background: linear-gradient(90deg, var(--eb-danger), #f87171);
}

.progress-bar-fill.warning {
    background: linear-gradient(90deg, var(--eb-warning), #fbbf24);
}

/* Budget Progress Card */
.budget-progress {
    margin-bottom: 1.5rem;
}

.budget-progress-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.budget-category {
    font-weight: 600;
    color: var(--text-primary);
}

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

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

.budget-total {
    color: var(--text-muted);
}

.budget-remaining {
    font-weight: 600;
}

.budget-remaining.positive {
    color: var(--eb-success);
}

.budget-remaining.negative {
    color: var(--eb-danger);
}

/* ============================================
   Empty State
   ============================================ */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.empty-state-icon svg {
    width: 40px;
    height: 40px;
}

.empty-state-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.empty-state-text {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.animate-fade-in {
    animation: fadeIn var(--transition-base) ease;
}

.animate-slide-up {
    animation: slideUp var(--transition-base) ease;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
        max-width: 100vw;
    }
    
    .hamburger {
        display: flex;
    }
    
    .stat-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .top-header {
        grid-template-columns: auto 1fr auto;
    }
    
    .header-logo {
        display: none;
    }
}

@media (max-width: 768px) {
    .page-content {
        padding: 1rem;
    }
    
    .top-header {
        padding: 1rem;
    }
    
    .stat-cards {
        grid-template-columns: 1fr;
    }
    
    .filters-bar {
        flex-direction: column;
    }
    
    .filter-group {
        width: 100%;
    }
    
    .filter-group .form-control {
        flex: 1;
    }
    
    .modal {
        width: 95%;
        max-height: 95vh;
    }
    
    .table th,
    .table td {
        padding: 0.75rem;
        font-size: 0.875rem;
    }
    
    .page-title {
        font-size: 1.25rem;
    }
    
    /* Mobile responsive table - horizontal scroll */
    .table-responsive-wrapper {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        max-width: 100%;
    }
    
    .expenses-table {
        min-width: 500px;
    }
    
    .expenses-table .category-badge {
        font-size: 0.75rem;
        padding: 0.25rem 0.625rem;
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 0.625rem 1rem;
        font-size: 0.8125rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .calc-btn {
        padding: 0.75rem;
        font-size: 1rem;
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--eb-success); }
.text-danger { color: var(--eb-danger); }
.text-primary { color: var(--eb-primary); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

.w-full { width: 100%; }

/* Mobile Menu Overlay */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.sidebar-overlay.show {
    opacity: 1;
    visibility: visible;
}