/**
 * US Dentist Directory - Material Design Stylesheet
 * Clean, flat design without gradients
 */

/* ========================================
   CSS Variables - Material Design Colors
   Enhanced Color Palette
   ======================================== */
:root {
    /* Primary Colors - Blue */
    --primary: #1976D2;
    --primary-dark: #1565C0;
    --primary-light: #42A5F5;
    --primary-50: #E3F2FD;
    --primary-100: #BBDEFB;
    --primary-200: #90CAF9;
    --primary-300: #64B5F6;
    --primary-400: #42A5F5;
    --primary-500: #2196F3;
    --primary-600: #1E88E5;
    --primary-700: #1976D2;
    --primary-800: #1565C0;
    --primary-900: #0D47A1;
    
    /* Secondary Colors - Teal */
    --secondary: #009688;
    --secondary-dark: #00796B;
    --secondary-light: #4DB6AC;
    --secondary-50: #E0F2F1;
    --secondary-100: #B2DFDB;
    --secondary-200: #80CBC4;
    --secondary-300: #4DB6AC;
    --secondary-400: #26A69A;
    --secondary-500: #009688;
    --secondary-600: #00897B;
    --secondary-700: #00796B;
    --secondary-800: #00695C;
    --secondary-900: #004D40;
    
    /* Neutral Colors */
    --background: #F5F7FA;
    --surface: #FFFFFF;
    --surface-variant: #FAFBFC;
    --surface-hover: #F8F9FA;
    
    /* Text Colors */
    --text-primary: #1A1A1A;
    --text-secondary: #6B7280;
    --text-disabled: #9CA3AF;
    --text-on-primary: #FFFFFF;
    --text-on-secondary: #FFFFFF;
    
    /* Border & Divider */
    --border: #E5E7EB;
    --divider: #F3F4F6;
    --border-light: #F9FAFB;
    
    /* Status Colors */
    --success: #10B981;
    --success-light: #D1FAE5;
    --error: #EF4444;
    --error-light: #FEE2E2;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --info: #3B82F6;
    --info-light: #DBEAFE;
    
    /* Shadows */
    --shadow-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-2: 0 3px 6px rgba(0,0,0,0.15), 0 2px 4px rgba(0,0,0,0.12);
    --shadow-3: 0 10px 20px rgba(0,0,0,0.15), 0 3px 6px rgba(0,0,0,0.10);
    --shadow-4: 0 15px 25px rgba(0,0,0,0.15), 0 5px 10px rgba(0,0,0,0.05);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--background);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

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

img {
    max-width: 100%;
    height: auto;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; font-weight: 300; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
    margin-bottom: var(--spacing-md);
}

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

.text-small {
    font-size: 0.875rem;
}

.text-center { text-align: center; }
.text-right { text-align: right; }

/* ========================================
   Layout Components
   ======================================== */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.main-content {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* Flexbox Utilities */
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* ========================================
   App Bar (Top Navigation)
   ======================================== */
.app-bar {
    background-color: var(--primary);
    color: var(--text-on-primary);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.app-bar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.app-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-on-primary);
    font-size: 1.25rem;
    font-weight: 500;
}

.app-logo:hover {
    color: var(--text-on-primary);
    opacity: 0.9;
}

.app-logo .material-icons {
    font-size: 28px;
}

.app-bar-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    color: rgba(255, 255, 255, 0.85);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-weight: 500;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-on-primary);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--text-on-primary);
}

.nav-link .material-icons {
    font-size: 20px;
}

.app-bar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn .material-icons {
    font-size: 18px;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--text-on-primary);
    box-shadow: 0 2px 4px rgba(25, 118, 210, 0.3);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: var(--text-on-primary);
    box-shadow: 0 4px 8px rgba(25, 118, 210, 0.4);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(25, 118, 210, 0.3);
}

.btn-secondary {
    background-color: var(--secondary);
    color: var(--text-on-secondary);
}

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    color: var(--text-on-secondary);
}

.btn-outlined {
    background-color: transparent;
    color: var(--text-on-primary);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.btn-outlined:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-on-primary);
}

.btn-text {
    background-color: transparent;
    color: var(--primary);
    padding: var(--spacing-sm);
}

.btn-text:hover {
    background-color: rgba(25, 118, 210, 0.08);
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-full);
}

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

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
}

/* ========================================
   Cards
   ======================================== */
.card {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-1);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
}

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

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--divider);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 500;
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card-title .material-icons {
    color: var(--primary);
}

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

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--divider);
    background-color: var(--surface-variant);
}

/* Stats Card */
.stats-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.stats-card .stats-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.stats-card .stats-icon.primary {
    background-color: var(--primary);
    color: var(--text-on-primary);
}

.stats-card .stats-icon.secondary {
    background-color: var(--secondary);
    color: var(--text-on-secondary);
}

.stats-card .stats-icon.success {
    background-color: var(--success);
    color: var(--text-on-primary);
}

.stats-card .stats-icon.warning {
    background-color: var(--warning);
    color: var(--text-on-primary);
}

.stats-card .stats-value {
    font-size: 2rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.stats-card .stats-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ========================================
   Dentist Card
   ======================================== */
.dentist-card {
    display: flex;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--divider);
    transition: background-color var(--transition-fast);
}

.dentist-card:last-child {
    border-bottom: none;
}

.dentist-card:hover {
    background-color: var(--surface-variant);
}

.dentist-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background-color: var(--primary);
    color: var(--text-on-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 1.125rem;
    flex-shrink: 0;
}

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

.dentist-name {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.dentist-name a {
    color: var(--text-primary);
}

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

.dentist-specialty {
    font-size: 0.875rem;
    color: var(--secondary);
    margin-bottom: var(--spacing-sm);
}

.dentist-details {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.dentist-detail {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.dentist-detail .material-icons {
    font-size: 16px;
    color: var(--text-disabled);
}

.dentist-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: flex-end;
}

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

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

.form-input,
.form-select {
    width: 100%;
    padding: 12px 16px;
    font-family: inherit;
    font-size: 0.9375rem;
    color: var(--text-primary);
    background-color: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    line-height: 1.5;
}

.form-input:hover,
.form-select:hover {
    border-color: var(--primary-light);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(25, 118, 210, 0.12);
    background-color: var(--surface);
}

.form-input::placeholder {
    color: var(--text-disabled);
}

.form-input:disabled,
.form-select:disabled {
    background-color: var(--surface-variant);
    color: var(--text-disabled);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Search Bar */
.search-bar {
    position: relative;
    max-width: 600px;
}

.search-bar .material-icons {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-disabled);
}

.search-bar .form-input {
    padding-left: 48px;
    padding-right: var(--spacing-lg);
    height: 48px;
    border-radius: var(--radius-full);
}

/* Filter Chips */
.filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chip:hover {
    background-color: var(--surface-variant);
    border-color: var(--primary);
    color: var(--primary);
}

.chip.active {
    background-color: var(--primary);
    border-color: var(--primary);
    color: var(--text-on-primary);
}

.chip .chip-remove {
    font-size: 16px;
    cursor: pointer;
    opacity: 0.7;
}

.chip .chip-remove:hover {
    opacity: 1;
}

/* ========================================
   Tables
   ======================================== */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-1);
}

.table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--surface);
}

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--divider);
}

.table th {
    font-weight: 500;
    color: var(--text-secondary);
    background-color: var(--surface-variant);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

.table tbody tr:hover {
    background-color: var(--surface-variant);
}

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

/* ========================================
   Pagination
   ======================================== */
.pagination-nav {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-xl);
}

.pagination {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    list-style: none;
}

.pagination li {
    display: flex;
}

.pagination .page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-sm);
    color: var(--text-secondary);
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.pagination .page-link:hover {
    background-color: var(--surface-variant);
    border-color: var(--primary);
    color: var(--primary);
}

.pagination .page-link.active {
    background-color: var(--primary);
    border-color: var(--primary);
    color: var(--text-on-primary);
}

.pagination .ellipsis {
    padding: 0 var(--spacing-sm);
    color: var(--text-disabled);
}

/* ========================================
   Footer
   ======================================== */
.app-footer {
    background-color: var(--surface);
    border-top: 1px solid var(--divider);
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footer-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-left .material-icons {
    font-size: 20px;
    color: var(--primary);
}

/* ========================================
   Detail Page
   ======================================== */
.detail-header {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.detail-avatar {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    background-color: var(--primary);
    color: var(--text-on-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 500;
    flex-shrink: 0;
}

.detail-title {
    flex: 1;
}

.detail-title h1 {
    margin-bottom: var(--spacing-xs);
}

.detail-title .specialty {
    font-size: 1.125rem;
    color: var(--secondary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.info-section {
    margin-bottom: var(--spacing-lg);
}

.info-section h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--divider);
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.info-item .material-icons {
    color: var(--primary);
    font-size: 20px;
    margin-top: 2px;
}

.info-item .info-content {
    flex: 1;
}

.info-item .info-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-item .info-value {
    font-size: 1rem;
    color: var(--text-primary);
}

.info-item .info-value a {
    color: var(--primary);
}

/* ========================================
   Empty State
   ======================================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-xxl);
    color: var(--text-secondary);
}

.empty-state .material-icons {
    font-size: 64px;
    color: var(--text-disabled);
    margin-bottom: var(--spacing-md);
}

.empty-state h3 {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   Loading Spinner
   ======================================== */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* ========================================
   Alerts & Notifications
   ======================================== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.alert .material-icons {
    font-size: 24px;
}

.alert-info {
    background-color: #E3F2FD;
    color: #1565C0;
}

.alert-success {
    background-color: #E8F5E9;
    color: #2E7D32;
}

.alert-warning {
    background-color: #FFF3E0;
    color: #E65100;
}

.alert-error {
    background-color: #FFEBEE;
    color: #C62828;
}

/* ========================================
   Badge
   ======================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background-color: var(--primary);
    color: var(--text-on-primary);
}

.badge-secondary {
    background-color: var(--secondary);
    color: var(--text-on-secondary);
}

.badge-success {
    background-color: var(--success);
    color: var(--text-on-primary);
}

.badge-error {
    background-color: var(--error);
    color: var(--text-on-primary);
}

.badge-warning {
    background-color: var(--warning);
    color: var(--text-on-primary);
}

.badge-info {
    background-color: var(--info);
    color: var(--text-on-primary);
}

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

/* ========================================
   Map placeholder
   ======================================== */
.map-container {
    width: 100%;
    height: 200px;
    background-color: var(--surface-variant);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-disabled);
}

/* ========================================
   Related Dentists Grid
   ======================================== */
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.related-card {
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.related-card .dentist-avatar {
    width: 40px;
    height: 40px;
    font-size: 0.875rem;
}

/* ========================================
   State Cards Grid
   ======================================== */
.state-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.state-card {
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.state-card:hover {
    background-color: var(--primary);
    color: var(--text-on-primary);
}

.state-card:hover .state-count {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--text-on-primary);
}

.state-name {
    font-weight: 500;
}

.state-count {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--surface-variant);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

/* ========================================
   Responsive Adjustments
   ======================================== */
@media (max-width: 768px) {
    .app-bar-container {
        padding: 0 var(--spacing-md);
    }
    
    .logo-text {
        display: none;
    }
    
    .nav-link span:not(.material-icons) {
        display: none;
    }
    
    .btn-text {
        display: none;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .detail-header {
        flex-direction: column;
        text-align: center;
    }
    
    .detail-avatar {
        margin: 0 auto;
    }
    
    .dentist-card {
        flex-direction: column;
    }
    
    .dentist-actions {
        flex-direction: row;
        align-items: center;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
    
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .app-bar,
    .app-footer,
    .btn,
    .pagination-nav {
        display: none !important;
    }
    
    .main-content {
        padding: 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--border);
    }
}

/* ========================================
   Utility Classes
   ======================================== */
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

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

.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

.hidden { display: none !important; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}