/*
Theme Name: Fitness Supplement Pro - Enhanced
Theme URI: https://fitnesssupplementpro.com
Description: Revenue-optimized WordPress theme for health & supplement authority websites. Built with conversion-focused design, SEO excellence, and monetization strategies based on top-performing health/wellness themes.
Version: 2.0.0
Author: Fitness Supplement Pro
Author URI: https://fitnesssupplementpro.com
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: fitnesssupplementpro
Tags: blog, health, wellness, affiliate-marketing, seo-optimized, responsive, accessible, conversion-focused

This theme integrates best practices from Astra, Kadence, GeneratePress, and Thrive Themes for maximum performance and conversions.
*/

/* ============================================
   CSS VARIABLES - Easy Theme Customization
   ============================================ */

:root {
    /* Colors - Elegant Teal Theme */
    --color-primary: #2c4a4f;
    --color-primary-dark: #1a3338;
    --color-primary-light: #3d5f65;
    --color-accent: #c8ddd4;
    --color-accent-dark: #b5d0c4;
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --color-affiliate: #ff6b6b;
    
    /* Neutral Colors */
    --color-white: #ffffff;
    --color-black: #1a1a1a;
    --color-gray-100: #f8f9fa;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-500: #adb5bd;
    --color-gray-600: #6c757d;
    --color-gray-700: #495057;
    --color-gray-800: #343a40;
    --color-gray-900: #212529;
    
    /* Typography */
    --font-primary: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-pill: 50px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.2);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Layout */
    --container-width: 1280px;
    --header-height: 80px;
    --sidebar-width: 350px;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --color-white: #1a1a1a;
    --color-black: #ffffff;
    --color-gray-100: #212529;
    --color-gray-200: #343a40;
    --color-gray-300: #495057;
    --color-gray-400: #6c757d;
    --color-gray-500: #adb5bd;
    --color-gray-600: #ced4da;
    --color-gray-700: #dee2e6;
    --color-gray-800: #e9ecef;
    --color-gray-900: #f8f9fa;
}

/* ============================================
   CSS RESET & BASE STYLES
   ============================================ */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-gray-100);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ============================================
   TYPOGRAPHY SYSTEM
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-black);
}

h1 { font-size: clamp(2rem, 5vw, 2.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2rem); }
h3 { font-size: clamp(1.5rem, 3.5vw, 1.75rem); }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-secondary);
}

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

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

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

strong, b {
    font-weight: 700;
}

em, i {
    font-style: italic;
}

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

/* ============================================
   LAYOUT SYSTEM
   ============================================ */

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

.container-fluid {
    max-width: 100%;
    padding: 0 var(--spacing-md);
}

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

.flex {
    display: flex;
    gap: var(--spacing-md);
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
    background-color: var(--color-white);
    border-bottom: 3px solid var(--color-primary);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-top {
    background-color: var(--color-gray-100);
    padding: var(--spacing-xs) 0;
    font-size: 0.875rem;
    font-family: var(--font-secondary);
}

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

.header-social a {
    margin-left: var(--spacing-sm);
    color: var(--color-gray-600);
}

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

.site-branding {
    padding: var(--spacing-md) 0;
    text-align: center;
}

.site-logo img {
    max-height: 60px;
    width: auto;
}

.site-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0;
}

.site-description {
    font-size: 0.9rem;
    color: var(--color-gray-600);
    margin-top: var(--spacing-xs);
    font-family: var(--font-secondary);
}

.main-navigation {
    background-color: var(--color-black);
}

.main-navigation ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

.main-navigation li {
    margin: 0;
    position: relative;
}

.main-navigation a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-white);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    font-family: var(--font-secondary);
    transition: background-color var(--transition-base);
}

.main-navigation a:hover,
.main-navigation .current-menu-item > a {
    background-color: var(--color-primary);
    text-decoration: none;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--color-black);
}

/* ============================================
   HERO SECTION
   ============================================ */

.homepage-hero {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0;
    margin-bottom: var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.homepage-hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, rgba(0,0,0,0.1) 100%);
    pointer-events: none;
}

.hero-content {
    text-align: left;
    max-width: 700px;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
    line-height: 1.1;
    font-weight: 700;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    opacity: 0.95;
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
    font-family: var(--font-secondary);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ============================================
   TRUST BADGES
   ============================================ */

.trust-badges {
    background: var(--color-white);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.trust-badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    text-align: center;
}

.trust-badge {
    padding: var(--spacing-md);
}

.trust-badge-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.trust-badge-text {
    font-size: 0.9rem;
    color: var(--color-gray-700);
    font-family: var(--font-secondary);
}

/* ============================================
   SECTION STYLING
   ============================================ */

.section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    border-bottom: 3px solid var(--color-primary);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.section-title {
    font-size: clamp(1.75rem, 3vw, 2rem);
    color: var(--color-black);
    margin: 0;
}

.section-link {
    font-size: 0.875rem;
    font-family: var(--font-secondary);
    color: var(--color-primary);
    font-weight: 600;
}

.section-subtitle {
    color: var(--color-gray-600);
    font-size: 1.1rem;
    margin-top: var(--spacing-sm);
    font-family: var(--font-secondary);
}

/* ============================================
   ARTICLE CARDS
   ============================================ */

.article-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.article-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.article-content {
    padding: var(--spacing-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.article-category {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 600;
    display: inline-block;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-secondary);
}

.article-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    flex-grow: 1;
}

.article-title a {
    color: var(--color-black);
}

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

.article-excerpt {
    color: var(--color-gray-600);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-secondary);
}

.article-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--color-gray-500);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-gray-200);
    font-family: var(--font-secondary);
}

.article-read-time {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* ============================================
   BUTTONS & CTAs
   ============================================ */

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-pill);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    font-size: 1rem;
    font-family: var(--font-secondary);
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

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

.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
    text-decoration: none;
}

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

.btn-success:hover {
    background-color: #218838;
    transform: translateY(-2px);
    text-decoration: none;
}

.btn-affiliate {
    background-color: var(--color-affiliate);
    color: var(--color-white);
    font-size: 1.1rem;
    padding: 1rem 2.5rem;
    box-shadow: var(--shadow-md);
}

.btn-affiliate:hover {
    background-color: #ff5252;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* ============================================
   STICKY CTA BAR
   ============================================ */

.sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-xl);
    z-index: 999;
    transform: translateY(100%);
    transition: transform var(--transition-base);
}

.sticky-cta.active {
    transform: translateY(0);
}

.sticky-cta-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--container-width);
    margin: 0 auto;
    gap: var(--spacing-md);
}

.sticky-cta-text h4 {
    color: var(--color-white);
    margin-bottom: 0.25rem;
    font-size: 1.125rem;
}

.sticky-cta-text p {
    margin: 0;
    font-size: 0.875rem;
    opacity: 0.9;
}

.sticky-cta-close {
    background: transparent;
    border: none;
    color: var(--color-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    line-height: 1;
}

/* ============================================
   AFFILIATE MARKETING COMPONENTS
   ============================================ */

.affiliate-banner {
    background: linear-gradient(135deg, var(--color-success) 0%, #20c997 100%);
    color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    margin: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden;
}

.affiliate-banner::before {
    content: '★';
    position: absolute;
    font-size: 15rem;
    opacity: 0.05;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.affiliate-banner h3 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.affiliate-banner p {
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
    position: relative;
    z-index: 1;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.product-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    transition: border-color var(--transition-base), transform var(--transition-base);
}

.product-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-3px);
}

.product-badge {
    background: var(--color-warning);
    color: var(--color-black);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-pill);
    font-size: 0.75rem;
    font-weight: 700;
    display: inline-block;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-secondary);
}

.product-image {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.product-title {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.product-rating {
    color: var(--color-warning);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.product-price {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-success);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-primary);
}

.product-price-old {
    text-decoration: line-through;
    color: var(--color-gray-500);
    font-size: 1.25rem;
    margin-left: 0.5rem;
}

/* Comparison Table */
.comparison-table {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin: var(--spacing-xl) 0;
}

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

.comparison-table th {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    font-family: var(--font-secondary);
}

.comparison-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-200);
}

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

.comparison-table .highlight {
    background: var(--color-gray-100);
}

/* ============================================
   CONTENT RECOMMENDATIONS
   ============================================ */

.related-posts {
    background: var(--color-gray-100);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-2xl);
}

.related-posts-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

/* ============================================
   NEWSLETTER SIGNUP
   ============================================ */

.newsletter-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    margin: var(--spacing-2xl) 0;
}

.newsletter-section h3 {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.newsletter-section p {
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 600px;
    margin: 0 auto;
}

.newsletter-input {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-secondary);
}

.newsletter-input:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ============================================
   SIDEBAR
   ============================================ */

.site-content {
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.sidebar {
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-md));
    height: fit-content;
}

.widget {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.widget-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-black);
    border-left: 4px solid var(--color-primary);
    padding-left: var(--spacing-sm);
}

.widget ul {
    list-style: none;
}

.widget li {
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

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

.widget a {
    color: var(--color-gray-700);
    font-family: var(--font-secondary);
}

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

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0 var(--spacing-md);
    margin-top: var(--spacing-2xl);
}

.footer-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-widget h3 {
    color: var(--color-white);
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-widget ul {
    list-style: none;
    padding: 0;
}

.footer-widget li {
    margin-bottom: var(--spacing-sm);
}

.footer-widget a {
    color: var(--color-gray-400);
    font-family: var(--font-secondary);
}

.footer-widget a:hover {
    color: var(--color-white);
}

.site-info {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-700);
    color: var(--color-gray-500);
    font-size: 0.875rem;
    font-family: var(--font-secondary);
}

.site-info a {
    color: var(--color-gray-400);
}

/* ============================================
   DARK MODE TOGGLE
   ============================================ */

.theme-toggle {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    z-index: 998;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    transform: scale(1.1);
    background: var(--color-primary-dark);
}

/* ============================================
   LOADING STATES
   ============================================ */

.skeleton {
    background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-300) 50%, var(--color-gray-200) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

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

@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 2.5rem;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .main-navigation {
        display: none;
    }
    
    .main-navigation.active {
        display: block;
    }
    
    .main-navigation ul {
        flex-direction: column;
    }
    
    .main-navigation a {
        text-align: center;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .footer-widgets {
        grid-template-columns: 1fr;
    }
    
    .sticky-cta-content {
        flex-direction: column;
        text-align: center;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container, .container-fluid {
        padding: 0 var(--spacing-sm);
    }
    
    .site-title {
        font-size: 1.5rem;
    }
    
    .article-card {
        margin-bottom: var(--spacing-md);
    }
    
    .theme-toggle {
        width: 50px;
        height: 50px;
        bottom: var(--spacing-md);
        right: var(--spacing-md);
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

.screen-reader-text {
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    width: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute !important;
    word-wrap: normal !important;
}

.screen-reader-text:focus {
    background-color: var(--color-white);
    border-radius: var(--radius-sm);
    box-shadow: 0 0 2px 2px rgba(0, 0, 0, 0.6);
    clip: auto !important;
    clip-path: none;
    color: var(--color-primary);
    display: block;
    font-size: 0.875rem;
    font-weight: bold;
    height: auto;
    left: 5px;
    line-height: normal;
    padding: 15px 23px 14px;
    text-decoration: none;
    top: 5px;
    width: auto;
    z-index: 100000;
}

/* Focus Visible Improvements */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

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

.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); }

.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); }

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

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.clearfix::after {
    content: "";
    display: table;
    clear: both;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .site-header, .site-footer, .sidebar, 
    .sticky-cta, .theme-toggle, .newsletter-section,
    .affiliate-banner {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
    }
    
    a {
        text-decoration: underline;
    }
    
    a[href]:after {
        content: " (" attr(href) ")";
    }
}