/**
 * MantelZicht - Mobile-First PWA Design
 * Professional financial dashboard - App-like experience
 * Primary: Teal (#0D9488)
 */

/* ========================================
   CSS Variables
   ======================================== */
:root {
    /* Primary Colors - Teal */
    --primary: #0D9488;
    --primary-hover: #0F766E;
    --primary-light: #CCFBF1;
    --primary-50: #F0FDFA;
    --primary-100: #CCFBF1;
    --primary-500: #14B8A6;
    --primary-600: #0D9488;
    --primary-700: #0F766E;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Semantic Colors */
    --success: #10B981;
    --success-light: #D1FAE5;
    --error: #EF4444;
    --error-light: #FEE2E2;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    
    /* Finance Colors */
    --income: #10B981;
    --income-light: #D1FAE5;
    --expense: #EF4444;
    --expense-light: #FEE2E2;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    
    /* Borders & Shadows */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 28px;
    --radius-full: 9999px;
    
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Layout */
    --sidebar-width: 260px;
    --bottom-nav-height: 64px;
    --header-height: 56px;
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--gray-50);
    min-height: 100vh;
    min-height: 100dvh;
    overscroll-behavior: none;
}

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--gray-900);
}

/* iOS Safe Areas */
@supports (padding: env(safe-area-inset-bottom)) {
    body {
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* ========================================
   Background Decoration
   ======================================== */
.bg-circle {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    opacity: 0.5;
    z-index: 0;
}

.bg-circle-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(13, 148, 136, 0.08) 0%, transparent 70%);
    top: -150px;
    right: -150px;
    animation: float-slow 25s ease-in-out infinite;
}

.bg-circle-2 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.06) 0%, transparent 70%);
    bottom: 100px;
    left: -150px;
    animation: float-slow 30s ease-in-out infinite reverse;
}

.bg-circle-3 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(13, 148, 136, 0.05) 0%, transparent 70%);
    top: 40%;
    left: 20%;
    animation: float-slow 20s ease-in-out infinite;
}

@keyframes float-slow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(20px, -20px) scale(1.05); }
}

/* ========================================
   App Layout - Mobile First
   ======================================== */
.app-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
    position: relative;
}

/* Desktop Sidebar - Hidden on Mobile */
.sidebar {
    display: none;
}

/* Mobile Header */
.mobile-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--white);
    border-bottom: 1px solid var(--gray-100);
    padding: 0 var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.9);
}

.mobile-logo {
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--gray-900);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-500) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 0.875rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.header-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--gray-600);
    transition: all var(--transition-fast);
}

.header-btn:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--space-4);
    padding-top: calc(var(--header-height) + var(--space-4));
    padding-bottom: calc(var(--bottom-nav-height) + var(--space-4) + var(--safe-area-bottom));
    position: relative;
    z-index: 1;
}

.content-wrapper {
    max-width: 600px;
    margin: 0 auto;
}

/* Bottom Navigation - App Style */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(var(--bottom-nav-height) + var(--safe-area-bottom));
    background: var(--white);
    border-top: 1px solid var(--gray-100);
    display: flex;
    align-items: flex-start;
    justify-content: space-around;
    padding-top: var(--space-2);
    padding-bottom: var(--safe-area-bottom);
    z-index: 100;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: var(--space-2);
    min-width: 64px;
    color: var(--gray-400);
    text-decoration: none;
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
}

.nav-item svg {
    width: 24px;
    height: 24px;
    transition: transform var(--transition-fast);
}

.nav-item span {
    font-size: 0.6875rem;
    font-weight: 500;
}

.nav-item:hover {
    color: var(--gray-600);
}

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

.nav-item.active svg {
    transform: scale(1.1);
}

/* Hide desktop footer on mobile */
.app-footer {
    display: none;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    -webkit-tap-highlight-color: transparent;
}

.btn:active {
    transform: scale(0.97);
}

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

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

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

.btn-ghost {
    background: transparent;
    color: var(--gray-600);
}

.btn-ghost:hover {
    background: var(--gray-100);
}

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

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: 0.8125rem;
    border-radius: var(--radius-md);
}

.btn-block {
    width: 100%;
}

.btn-link {
    color: var(--primary);
    font-weight: 500;
    font-size: 0.875rem;
}

/* ========================================
   Form Elements
   ======================================== */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--gray-700);
}

.form-input,
select {
    width: 100%;
    padding: var(--space-4);
    font-family: inherit;
    font-size: 1rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    background: var(--white);
    color: var(--gray-900);
    transition: all var(--transition-fast);
    -webkit-appearance: none;
}

.form-input:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.1);
}

/* ========================================
   Cards
   ======================================== */
.card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-4);
    overflow: hidden;
}

.card-header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
}

.card-header h2 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
}

.card-body {
    padding: var(--space-5);
}

/* ========================================
   Alerts
   ======================================== */
.alert {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 0.875rem;
}

.alert-success {
    background: var(--success-light);
    color: #065F46;
}

.alert-error {
    background: var(--error-light);
    color: #991B1B;
}

/* ========================================
   Page Header
   ======================================== */
.page-header {
    margin-bottom: var(--space-6);
}

.greeting h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-1);
}

.greeting .date {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.page-subtitle {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.quick-actions {
    margin-top: var(--space-4);
}

.quick-actions .btn {
    width: 100%;
}

/* ========================================
   Stats Grid - Mobile Optimized
   ======================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    transition: transform var(--transition-fast);
    animation: fadeInUp 0.4s ease forwards;
    opacity: 0;
}

.stat-card:nth-child(1) { animation-delay: 0s; }
.stat-card:nth-child(2) { animation-delay: 0.05s; }
.stat-card:nth-child(3) { animation-delay: 0.1s; }
.stat-card:nth-child(4) { animation-delay: 0.15s; }

.stat-card:active {
    transform: scale(0.98);
}

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

.stat-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon svg {
    width: 20px;
    height: 20px;
}

.stat-icon.income { background: var(--income-light); color: var(--income); }
.stat-icon.expense { background: var(--expense-light); color: var(--expense); }
.stat-icon.balance { background: var(--primary-100); color: var(--primary); }
.stat-icon.transactions { background: var(--gray-100); color: var(--gray-600); }

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

.stat-label {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-bottom: 2px;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-mono);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

/* ========================================
   Dashboard Grid
   ======================================== */
.dashboard-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

/* Period Selector */
.period-selector {
    display: flex;
    gap: var(--space-1);
    background: var(--gray-100);
    padding: 3px;
    border-radius: var(--radius-md);
}

.period-btn {
    flex: 1;
    padding: var(--space-2);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-500);
    border-radius: 6px;
    text-align: center;
    transition: all var(--transition-fast);
}

.period-btn.active {
    background: var(--white);
    color: var(--primary);
    box-shadow: var(--shadow-xs);
}

/* Category Chart */
.category-chart {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.category-bar-item {
    animation: slideInLeft 0.3s ease forwards;
    opacity: 0;
    animation-delay: var(--delay, 0s);
}

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

.category-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2);
}

.category-name {
    font-weight: 500;
    font-size: 0.875rem;
}

.category-stats {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.category-amount {
    font-weight: 600;
    font-size: 0.875rem;
    font-family: var(--font-mono);
}

.category-percentage {
    font-size: 0.6875rem;
    color: var(--gray-500);
    background: var(--gray-100);
    padding: 2px 6px;
    border-radius: var(--radius-full);
}

.category-bar {
    height: 8px;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.category-bar-fill {
    height: 100%;
    background: var(--primary);
    border-radius: var(--radius-full);
    transition: width 0.5s ease;
}

/* Monthly Chart */
.chart-container {
    padding: var(--space-2) 0;
}

.monthly-chart {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    height: 160px;
    gap: var(--space-1);
    padding: 0 var(--space-2);
}

.month-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    flex: 1;
    animation: fadeInUp 0.3s ease forwards;
    opacity: 0;
    animation-delay: var(--delay, 0s);
}

.bars {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 120px;
    width: 100%;
    justify-content: center;
}

.bar {
    width: 14px;
    border-radius: 4px 4px 0 0;
    transition: all var(--transition-base);
    position: relative;
}

.bar:active {
    opacity: 0.7;
}

.income-bar {
    background: linear-gradient(180deg, var(--income) 0%, #059669 100%);
}

.expense-bar {
    background: linear-gradient(180deg, var(--expense) 0%, #DC2626 100%);
}

.bar-tooltip {
    display: none;
}

.month-label {
    font-size: 0.6875rem;
    color: var(--gray-500);
    font-weight: 500;
}

.chart-legend {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    padding-top: var(--space-3);
    margin-top: var(--space-3);
    border-top: 1px solid var(--gray-100);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.75rem;
    color: var(--gray-600);
}

.legend-color {
    width: 10px;
    height: 10px;
    border-radius: 3px;
}

.legend-color.income { background: var(--income); }
.legend-color.expense { background: var(--expense); }

/* ========================================
   Transaction List
   ======================================== */
.transaction-list {
    display: flex;
    flex-direction: column;
}

.transaction-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--gray-100);
    animation: fadeInUp 0.3s ease forwards;
    opacity: 0;
    animation-delay: var(--delay, 0s);
}

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

.transaction-item:active {
    background: var(--gray-50);
    margin: 0 calc(var(--space-4) * -1);
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

.transaction-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.transaction-icon svg {
    width: 16px;
    height: 16px;
}

.transaction-icon.income { background: var(--income-light); color: var(--income); }
.transaction-icon.expense { background: var(--expense-light); color: var(--expense); }

.transaction-info {
    flex: 1;
    min-width: 0;
}

.transaction-desc {
    font-weight: 500;
    font-size: 0.875rem;
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.transaction-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.transaction-date {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.transaction-category {
    font-size: 0.625rem;
    padding: 2px 6px;
    background: var(--gray-100);
    color: var(--gray-600);
    border-radius: var(--radius-full);
    font-weight: 500;
}

.transaction-amount {
    font-weight: 600;
    font-size: 0.875rem;
    font-family: var(--font-mono);
    white-space: nowrap;
}

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

/* ========================================
   Empty State
   ======================================== */
.empty-state {
    text-align: center;
    padding: var(--space-10) var(--space-4);
}

.empty-icon {
    color: var(--gray-300);
    margin-bottom: var(--space-4);
}

.empty-state p {
    color: var(--gray-500);
    margin-bottom: var(--space-4);
}

/* ========================================
   Auth Pages
   ======================================== */
.auth-page {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    position: relative;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--primary-50) 100%);
}

.auth-container {
    width: 100%;
    max-width: 400px;
    position: relative;
    z-index: 10;
}

.auth-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-xl);
    text-align: center;
}

.auth-logo {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-6);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-500) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
}

.auth-title {
    font-size: 1.375rem;
    margin-bottom: var(--space-2);
}

.auth-subtitle {
    color: var(--gray-500);
    font-size: 0.875rem;
    margin-bottom: var(--space-6);
}

.auth-form {
    text-align: left;
}

.auth-footer {
    margin-top: var(--space-6);
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* ========================================
   Upload Page
   ======================================== */
.upload-area {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-xl);
    padding: var(--space-10) var(--space-6);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
    background: var(--gray-50);
}

.upload-area:active,
.upload-area.drag-over {
    border-color: var(--primary);
    background: var(--primary-50);
    transform: scale(0.99);
}

.upload-area.has-file {
    border-color: var(--success);
    background: var(--success-light);
}

.upload-icon {
    color: var(--gray-400);
    margin-bottom: var(--space-4);
}

.upload-area h3 {
    font-size: 1rem;
    margin-bottom: var(--space-2);
}

.upload-hint {
    color: var(--gray-500);
    font-size: 0.8125rem;
    margin-top: var(--space-4);
}

/* ========================================
   Filters
   ======================================== */
.filters-card {
    padding: var(--space-4);
    margin-bottom: var(--space-4);
}

.filters-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.filter-group label {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.filter-group select {
    padding: var(--space-3);
    font-size: 0.875rem;
}

/* ========================================
   Categories Page
   ======================================== */
.categories-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.category-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary);
}

.category-card:active {
    transform: scale(0.99);
}

/* ========================================
   Settings Page
   ======================================== */
.settings-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.settings-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
}

.settings-info h3 {
    font-size: 0.9375rem;
    margin-bottom: var(--space-1);
}

.settings-info p {
    color: var(--gray-500);
    font-size: 0.8125rem;
}

.settings-item .btn {
    align-self: flex-start;
}

.danger-zone {
    border: 1px solid var(--error);
}

.danger-zone .card-header {
    background: var(--error-light);
}

/* ========================================
   Desktop Styles (768px+)
   ======================================== */
@media (min-width: 768px) {
    .app-layout {
        flex-direction: row;
    }
    
    .sidebar {
        display: flex;
        flex-direction: column;
        width: var(--sidebar-width);
        background: var(--white);
        border-right: 1px solid var(--gray-100);
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        z-index: 100;
    }
    
    .sidebar-header {
        padding: var(--space-6);
        border-bottom: 1px solid var(--gray-100);
    }
    
    .sidebar-logo {
        display: flex;
        align-items: center;
        gap: var(--space-3);
    }
    
    .sidebar .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    .logo-text {
        font-size: 1.25rem;
        font-weight: 700;
        color: var(--gray-900);
    }
    
    .sidebar-nav {
        flex: 1;
        padding: var(--space-4);
        overflow-y: auto;
    }
    
    .sidebar .nav-item {
        flex-direction: row;
        justify-content: flex-start;
        gap: var(--space-3);
        padding: var(--space-3) var(--space-4);
        color: var(--gray-600);
        font-weight: 500;
        margin-bottom: var(--space-1);
    }
    
    .sidebar .nav-item svg {
        width: 20px;
        height: 20px;
    }
    
    .sidebar .nav-item span {
        font-size: 0.9375rem;
    }
    
    .sidebar .nav-item:hover {
        background: var(--gray-50);
        color: var(--gray-900);
    }
    
    .sidebar .nav-item.active {
        background: var(--primary-50);
        color: var(--primary);
    }
    
    .sidebar-footer {
        padding: var(--space-4);
        border-top: 1px solid var(--gray-100);
    }
    
    .user-info {
        display: flex;
        align-items: center;
        gap: var(--space-3);
        margin-bottom: var(--space-3);
    }
    
    .user-avatar {
        width: 40px;
        height: 40px;
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-500) 100%);
        border-radius: var(--radius-full);
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-weight: 600;
        font-size: 0.875rem;
    }
    
    .user-details {
        flex: 1;
        min-width: 0;
    }
    
    .user-name {
        font-weight: 600;
        font-size: 0.875rem;
        display: block;
    }
    
    .user-email {
        font-size: 0.75rem;
        color: var(--gray-500);
        display: block;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .mobile-header {
        display: none;
    }
    
    .bottom-nav {
        display: none;
    }
    
    .main-content {
        margin-left: var(--sidebar-width);
        padding: var(--space-8);
        padding-bottom: var(--space-8);
    }
    
    .content-wrapper {
        max-width: 1000px;
    }
    
    .app-footer {
        display: block;
        margin-left: var(--sidebar-width);
        padding: var(--space-6);
        text-align: center;
        color: var(--gray-500);
        font-size: 0.8125rem;
        border-top: 1px solid var(--gray-100);
        background: var(--white);
    }
    
    .app-footer .privacy-badge {
        color: var(--primary);
        font-weight: 500;
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-4);
    }
    
    .stat-card {
        flex-direction: row;
        align-items: flex-start;
        padding: var(--space-5);
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .dashboard-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
    
    .page-header {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
    }
    
    .quick-actions {
        margin-top: 0;
    }
    
    .quick-actions .btn {
        width: auto;
    }
    
    .monthly-chart {
        height: 200px;
    }
    
    .bars {
        height: 160px;
    }
    
    .bar {
        width: 20px;
    }
    
    .filters-form {
        flex-direction: row;
        align-items: flex-end;
    }
    
    .filter-group select {
        min-width: 160px;
    }
    
    .categories-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
    }
    
    .settings-item {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .settings-item .btn {
        align-self: center;
    }
}

/* ========================================
   Large Desktop (1200px+)
   ======================================== */
@media (min-width: 1200px) {
    .content-wrapper {
        max-width: 1100px;
    }
    
    .categories-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .sidebar, .mobile-header, .bottom-nav, .app-footer, .quick-actions, .filters-card, .btn {
        display: none !important;
    }
    
    .main-content {
        margin: 0;
        padding: 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--gray-200);
    }
}

/* ========================================
   Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}