/**
 * styles.css
 * Version: 1.0.2
 * Date: December 13, 2025
 *
 * Central stylesheet for Expense Manager application.
 * Provides unified styling across all screens with a muted, professional color palette.
 * Inspired by CEC-Reports design system.
 */

/* ============================================
   CSS CUSTOM PROPERTIES (Color Palette)
   Muted, professional colors with warm undertones
   ============================================ */
:root {
    /* Primary Colors - Muted Navy/Slate */
    --color-primary: #3d4f5f;
    --color-primary-dark: #2c3e4a;
    --color-primary-light: #5a6f7f;
    
    /* Accent Colors - Warm Muted Tones */
    --color-accent: #6b8e7b;           /* Sage green */
    --color-accent-dark: #4a7060;
    --color-accent-light: #8ba99b;
    
    /* Secondary Accent - Muted Gold/Tan */
    --color-secondary: #a08060;
    --color-secondary-dark: #806648;
    --color-secondary-light: #c0a080;
    
    /* Status Colors - Muted versions */
    --color-success: #5f8a6b;
    --color-success-bg: #e8f0ea;
    --color-warning: #b08850;
    --color-warning-bg: #f5efe5;
    --color-danger: #a05050;
    --color-danger-bg: #f5e8e8;
    --color-info: #5080a0;
    --color-info-bg: #e5eef5;
    
    /* Neutral Colors */
    --color-white: #ffffff;
    --color-gray-50: #f8f9fa;
    --color-gray-100: #f1f3f4;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Text Colors */
    --text-primary: #2c3e4a;
    --text-secondary: #5a6a7a;
    --text-muted: #8a9aaa;
    --text-light: #ffffff;
    
    /* Background Colors */
    --bg-body: #f5f6f7;
    --bg-card: #ffffff;
    --bg-header: var(--color-primary);
    --bg-nav: var(--color-primary-dark);
    --bg-filter: #f8f9fa;
    
    /* Border Colors */
    --border-light: #e5e7eb;
    --border-medium: #d1d5db;
    --border-dark: #9ca3af;
    
    /* Shadows */
    --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);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ============================================
   BASE STYLES
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Merriweather', Georgia, serif;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin: 0 0 var(--spacing-md);
    line-height: 1.3;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

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

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

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-narrow {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-wide {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.app-header {
    background-color: var(--bg-header);
    border-bottom: 3px solid var(--color-secondary);
    padding: var(--spacing-md) 0;
}

.app-header .header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.app-header .logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.app-header .logo-section img {
    height: 48px;
    width: auto;
}

.app-header .app-title {
    color: var(--text-light);
    margin: 0;
    font-size: 1.5rem;
}

.app-header .app-subtitle {
    color: var(--color-gray-300);
    font-size: 0.875rem;
    margin: 0;
}

/* Navigation Bar */
.app-nav {
    background-color: var(--bg-nav);
    box-shadow: var(--shadow-md);
}

.app-nav .nav-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.nav-item {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray-200);
    padding: var(--spacing-md) var(--spacing-lg);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    border-bottom: 3px solid transparent;
    transition: all var(--transition-fast);
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    border-bottom-color: var(--color-secondary);
    text-decoration: none;
}

.nav-item.active {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--text-light);
    border-bottom-color: var(--color-accent);
}

.nav-item i {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* User Info Bar */
.user-bar {
    background-color: var(--color-gray-50);
    border-bottom: 1px solid var(--border-light);
    padding: var(--spacing-sm) 0;
}

.user-bar .user-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.user-bar .user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    color: var(--text-secondary);
}

.user-bar .user-name {
    font-weight: 600;
    color: var(--color-primary);
}

.user-bar .user-role {
    color: var(--text-muted);
}

.user-bar .logout-link {
    color: var(--color-danger);
    font-weight: 500;
}

.user-bar .logout-link:hover {
    text-decoration: underline;
}

/* ============================================
   CARDS & PANELS
   ============================================ */
.card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.card-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--text-light);
    padding: var(--spacing-md) var(--spacing-lg);
}

.card-header h2,
.card-header h3 {
    color: var(--text-light);
    margin: 0;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-gray-50);
    border-top: 1px solid var(--border-light);
}

/* Section Cards (fieldsets) */
.section-card {
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    background-color: var(--color-gray-50);
}

.section-card legend {
    font-family: 'Merriweather', Georgia, serif;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary);
    padding: 0 var(--spacing-sm);
    background-color: var(--color-gray-50);
}

/* ============================================
   QUICK ACCESS SECTION
   ============================================ */
.quick-access {
    padding: var(--spacing-lg);
}

.quick-access-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-md);
}

.quick-access-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background-color: var(--bg-card);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.quick-access-item:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
}

.quick-access-item i {
    font-size: 2rem;
    color: var(--color-primary);
}

.quick-access-item span {
    font-weight: 600;
    font-size: 0.9375rem;
    text-align: center;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn:hover {
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
    color: var(--text-light);
}

.btn-secondary {
    background-color: var(--color-gray-500);
    color: var(--text-light);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-gray-600);
    color: var(--text-light);
}

.btn-accent {
    background-color: var(--color-accent);
    color: var(--text-light);
}

.btn-accent:hover:not(:disabled) {
    background-color: var(--color-accent-dark);
    color: var(--text-light);
}

.btn-success {
    background-color: var(--color-success);
    color: var(--text-light);
}

.btn-success:hover:not(:disabled) {
    background-color: #4a7258;
    color: var(--text-light);
}

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

.btn-danger:hover:not(:disabled) {
    background-color: #8a4040;
    color: var(--text-light);
}

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

.btn-outline:hover:not(:disabled) {
    background-color: var(--color-primary);
    color: var(--text-light);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.8125rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

/* ============================================
   FORMS & INPUTS
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-md);
}

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

.form-group label .required {
    color: var(--color-danger);
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9375rem;
    color: var(--text-primary);
    background-color: var(--bg-card);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(61, 79, 95, 0.15);
}

.form-control:disabled,
.form-control[readonly] {
    background-color: var(--color-gray-100);
    color: var(--text-secondary);
    cursor: not-allowed;
}

select.form-control {
    cursor: pointer;
}

/* Read-only text display */
.readonly-text {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-gray-100);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-weight: 500;
    min-height: 42px;
    word-wrap: break-word;
}

/* ============================================
   FILTER PANEL
   ============================================ */
.filter-panel {
    background-color: var(--bg-filter);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.filter-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-light);
}

.filter-panel-header h2 {
    margin: 0;
    font-size: 1.125rem;
    color: var(--color-primary);
}

.filter-group {
    margin-bottom: var(--spacing-md);
}

.filter-group label {
    display: block;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.filter-group input,
.filter-group select {
    width: 100%;
    padding: var(--spacing-sm);
    font-size: 0.875rem;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    background-color: var(--bg-card);
}

.filter-group input:focus,
.filter-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(61, 79, 95, 0.1);
}

.filter-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* Radio/Checkbox filter groups */
.filter-radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm) var(--spacing-lg);
    margin-top: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
}

.filter-radio-group label {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 400;
    font-size: 0.875rem;
    text-transform: none;
    cursor: pointer;
    white-space: nowrap;
}

.filter-radio-group input[type="radio"],
.filter-radio-group input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin: 0;
    cursor: pointer;
    accent-color: var(--color-primary);
    flex-shrink: 0;
}

/* ============================================
   TABLES
   ============================================ */
.data-table-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.data-table thead th {
    position: sticky;
    top: 0;
    background-color: var(--color-gray-100);
    color: var(--color-primary-dark);
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 2px solid var(--border-medium);
    z-index: 10;
}

.data-table thead th a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: inherit;
    text-decoration: none;
}

.data-table thead th a:hover {
    color: var(--color-info);
    text-decoration: none;
}

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

.data-table tbody tr:hover {
    background-color: var(--color-gray-50);
}

.data-table tbody td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
    font-size: 0.875rem;
    vertical-align: middle;
}

/* Alternating row colors - using explicit classes because detail rows disrupt nth-child */
.data-table tbody tr.row-odd {
    background-color: #ffffff;
}

.data-table tbody tr.row-even {
    background-color: #f0f2f4;
}

.data-table tbody tr.row-odd:hover,
.data-table tbody tr.row-even:hover {
    background-color: #e8eaed;
}

/* Fallback for tables without explicit classes */
.data-table tbody tr:nth-child(even):not(.expense-row):not(.detail-row-wrapper) {
    background-color: #f0f2f4;
}

/* Sort arrows */
.sort-arrow {
    font-size: 0.7em;
    margin-left: var(--spacing-sm);
    opacity: 0.7;
}

/* ============================================
   EXPANDABLE ROWS (Binocular View)
   ============================================ */
.expand-btn {
    cursor: pointer;
    color: var(--color-primary);
    transition: transform var(--transition-fast), color var(--transition-fast);
    font-size: 1rem;
}

.expand-btn:hover {
    color: var(--color-accent);
    transform: scale(1.1);
}

.expand-btn.expanded {
    color: var(--color-accent);
}

.detail-row {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.detail-row.expanded {
    max-height: 500px;
}

.detail-row-content {
    background-color: var(--color-gray-50);
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 2px solid var(--border-light);
}

.detail-row-header {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px dashed var(--border-medium);
}

.detail-row-header .detail-item {
    display: flex;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

.detail-row-header .detail-label {
    color: var(--text-muted);
    font-weight: 500;
}

.detail-row-header .detail-value {
    color: var(--text-primary);
    font-weight: 600;
}

/* QuickBooks status in detail row */
.qb-status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.qb-status-badge.posted {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.qb-status-badge.not-posted {
    background-color: var(--color-gray-100);
    color: var(--text-muted);
}

.qb-status-badge.partial {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

/* Itemized expenses in detail row */
.itemized-list {
    font-size: 0.8125rem;
    background-color: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-light);
}

.itemized-list-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

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

/* Alternating row colors for itemized list */
.itemized-list-item:nth-child(odd) {
    background-color: var(--bg-card);
}

.itemized-list-item:nth-child(even) {
    background-color: var(--color-gray-100);
}

.itemized-list-item .item-info {
    color: var(--text-secondary);
}

.itemized-list-item .item-amount {
    font-weight: 600;
    color: var(--text-primary);
}

/* ============================================
   STATUS BADGES
   ============================================ */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.status-badge.submitted {
    background-color: var(--color-info-bg);
    color: var(--color-info);
}

.status-badge.approved {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.status-badge.vouchered {
    background-color: #e8e5f5;
    color: #6050a0;
}

.status-badge.rejected {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

/* ============================================
   MESSAGES & ALERTS
   ============================================ */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid;
}

.alert-success {
    background-color: var(--color-success-bg);
    color: #2d5a3b;
    border-left-color: var(--color-success);
}

.alert-warning {
    background-color: var(--color-warning-bg);
    color: #6b4a20;
    border-left-color: var(--color-warning);
}

.alert-danger {
    background-color: var(--color-danger-bg);
    color: #6b2020;
    border-left-color: var(--color-danger);
}

.alert-info {
    background-color: var(--color-info-bg);
    color: #2a5070;
    border-left-color: var(--color-info);
}

/* QuickBooks Connection Status */
.qb-connection-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.qb-connection-status.connected {
    background-color: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.qb-connection-status.disconnected {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid var(--color-warning);
}

/* ============================================
   MODALS
   ============================================ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 90%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-gray-50);
    border-bottom: 1px solid var(--border-light);
}

.modal-header h2 {
    margin: 0;
}

.modal-close {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-muted);
    cursor: pointer;
    background: none;
    border: none;
    line-height: 1;
}

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

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.modal-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-gray-50);
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

/* ============================================
   DRAG & DROP FILE UPLOAD
   ============================================ */
.drop-area {
    border: 2px dashed var(--border-medium);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.drop-area:hover,
.drop-area.highlight {
    border-color: var(--color-accent);
    background-color: var(--color-success-bg);
}

.drop-area p {
    margin: 0;
}

.drop-area .browse-link {
    color: var(--color-info);
    font-weight: 600;
    cursor: pointer;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-left { text-align: left; }

.text-muted { color: var(--text-muted); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

.hidden { display: none !important; }
.block { display: block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */
@media (max-width: 768px) {
    .app-header .header-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .nav-item {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }
    
    .quick-access-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .data-table-container {
        overflow-x: auto;
    }
    
    .filter-panel {
        margin-bottom: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .quick-access-grid {
        grid-template-columns: 1fr;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .filter-actions {
        flex-direction: column;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .app-header,
    .app-nav,
    .user-bar,
    .filter-panel,
    .btn,
    .no-print {
        display: none !important;
    }
    
    body {
        background-color: white;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .detail-row {
        max-height: none !important;
    }
}