/* ============================================================
   EzTechify Blog - Main Stylesheet
   Mobile-First | Performance Optimized | SEO Ready
   ============================================================ */

/* CSS Variables */
:root {
    --primary: #0d6efd;
    --primary-dark: #0b5ed7;
    --primary-light: #e7f1ff;
    --secondary: #6c757d;
    --success: #198754;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #0dcaf0;
    --dark: #1a1a2e;
    --darker: #0f0f1a;
    --light: #f8f9fa;
    --lighter: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --body-bg: #f5f7fa;
    --body-color: #333;
    --heading-color: #1a1a2e;
    --link-color: #0d6efd;
    --link-hover: #0b5ed7;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 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);
    --radius-sm: 6px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition-fast: 0.15s ease;
    --transition: 0.25s ease;
    --transition-slow: 0.4s ease;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
    --header-height: 72px;
    --container-max: 1280px;
    --container-padding: 1.5rem;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --body-bg: #0f0f1a;
        --body-color: #e2e8f0;
        --heading-color: #f8f9fa;
        --border-color: #2d3748;
        --gray-100: #1a1a2e;
        --gray-200: #2d3748;
        --gray-300: #4a5568;
    }
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--body-color);
    background: var(--body-bg);
    min-height: 100vh;
    overflow-x: hidden;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

input, button, textarea, select {
    font: inherit;
    color: inherit;
}

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

a:hover, a:focus {
    color: var(--link-hover);
    text-decoration: underline;
}

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

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

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    z-index: 9999;
    font-weight: 600;
    transition: top var(--transition);
}

.skip-link:focus {
    top: 1rem;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-sm {
    max-width: 768px;
}

.container-md {
    max-width: 960px;
}

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

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: box-shadow var(--transition);
}

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

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--heading-color);
    text-decoration: none;
    flex-shrink: 0;
}

.logo:hover, .logo:focus {
    color: var(--heading-color);
    text-decoration: none;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), #6610f2);
    border-radius: var(--radius);
    color: white;
    font-size: 1.1rem;
}

.logo-accent {
    color: var(--primary);
}

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 1rem;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: var(--radius);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav-link:hover, .nav-link:focus, .nav-link.active {
    color: var(--primary);
    background: var(--primary-light);
    text-decoration: none;
}

.nav-link i {
    font-size: 0.75rem;
    transition: transform var(--transition-fast);
}

.nav-dropdown:hover .nav-link i {
    transform: rotate(180deg);
}

/* Dropdown */
.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    min-width: 240px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition);
    list-style: none;
    z-index: 1001;
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1rem;
    color: var(--gray-700);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.dropdown-link:hover, .dropdown-link:focus {
    background: var(--primary-light);
    color: var(--primary);
    text-decoration: none;
}

.dropdown-link i {
    width: 20px;
    text-align: center;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.search-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--gray-100);
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--gray-700);
    transition: all var(--transition-fast);
}

.search-toggle:hover, .search-toggle:focus {
    background: var(--primary-light);
    color: var(--primary);
}

/* Mobile Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--gray-100);
    border-radius: var(--radius);
    cursor: pointer;
    gap: 5px;
}

.hamburger {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    position: relative;
    transition: all var(--transition);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 20px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: all var(--transition);
}

.hamburger::before { top: -6px; }
.hamburger::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* Search Overlay */
.search-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 2000;
}

.search-overlay.active {
    opacity: 1;
    visibility: visible;
}

.search-container {
    width: 100%;
    max-width: 700px;
    padding: 0 1.5rem;
    position: relative;
}

.search-form {
    display: flex;
    gap: 0.5rem;
}

.search-input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    background: white;
    font-size: 1.1rem;
    color: var(--gray-800);
    transition: border-color var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
}

.search-input::placeholder {
    color: var(--gray-400);
}

.search-submit {
    padding: 1rem 1.5rem;
    border: none;
    border-radius: var(--radius-lg);
    background: var(--primary);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.search-submit:hover, .search-submit:focus {
    background: var(--primary-dark);
}

.search-close {
    position: absolute;
    top: -3rem;
    right: 1.5rem;
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.search-close:hover, .search-close:focus {
    background: rgba(255,255,255,0.2);
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    line-height: 1.4;
}

.btn:hover, .btn:focus {
    text-decoration: none;
    transform: translateY(-2px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #6610f2);
    color: white;
    box-shadow: 0 4px 14px rgba(13, 110, 253, 0.3);
}

.btn-primary:hover, .btn-primary:focus {
    background: linear-gradient(135deg, var(--primary-dark), #5a0db8);
    box-shadow: 0 6px 20px rgba(13, 110, 253, 0.4);
    color: white;
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover, .btn-secondary:focus {
    background: var(--gray-300);
    color: var(--gray-800);
}

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

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

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.05rem;
}

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

.hero {
    padding: calc(var(--header-height) + 4rem) 0 5rem;
    background: linear-gradient(135deg, var(--darker) 0%, var(--dark) 50%, #1a1a4e 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(13,110,253,0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse-glow 6s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 0.8; }
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 100px;
    color: #a0c4ff;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.6s ease;
}

.hero-badge i {
    color: #ffc107;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    color: white;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-title span {
    background: linear-gradient(135deg, #a0c4ff, #0d6efd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.75);
    line-height: 1.7;
    margin-bottom: 2rem;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-stats {
    display: flex;
    gap: 2.5rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-stat {
    text-align: center;
}

.hero-stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: white;
    line-height: 1;
}

.hero-stat-label {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    margin-top: 0.25rem;
}

.hero-image {
    position: relative;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-image-wrapper {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: transform var(--transition-slow);
}

.hero-image-wrapper:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.hero-image-wrapper img {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
}

.hero-image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
}

.hero-image-tag {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    background: var(--primary);
    color: white;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 0.5rem;
}

.hero-image-title {
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
}

.hero-float {
    position: absolute;
    padding: 0.75rem 1rem;
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-800);
    animation: float 3s ease-in-out infinite;
}

.hero-float i {
    color: var(--primary);
}

.hero-float-1 { top: 20%; right: -20px; animation-delay: 0s; }
.hero-float-2 { bottom: 30%; left: -30px; animation-delay: 1s; }
.hero-float-3 { top: 50%; right: -10px; animation-delay: 2s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

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

/* ============================================================
   SECTIONS
   ============================================================ */

.section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 100px;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--heading-color);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ============================================================
   CATEGORY CARDS
   ============================================================ */

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.category-card {
    display: flex;
    flex-direction: column;
    padding: 2rem;
    background: var(--lighter);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
    text-decoration: none;
    color: inherit;
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--cat-color);
    transition: width var(--transition);
}

.category-card:hover, .category-card:focus {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--cat-color);
    text-decoration: none;
    color: inherit;
}

.category-card:hover::before, .category-card:focus::before {
    width: 100%;
    opacity: 0.05;
}

.category-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
}

.category-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--heading-color);
    margin-bottom: 0.5rem;
}

.category-card p {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.5;
    margin-bottom: 1.25rem;
    flex-grow: 1;
}

.category-count {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--cat-color);
    transition: gap var(--transition-fast);
}

.category-card:hover .category-count {
    gap: 0.75rem;
}

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

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.article-card {
    background: var(--lighter);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.article-card:hover, .article-card:focus-within {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.card-image {
    position: relative;
    display: block;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.article-card:hover .card-image img {
    transform: scale(1.05);
}

.card-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.35rem 0.75rem;
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-radius: 100px;
    backdrop-filter: blur(10px);
}

.card-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.8rem;
    color: var(--gray-500);
}

.card-meta i {
    margin-right: 0.25rem;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 0.75rem;
}

.card-title a {
    color: var(--heading-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.card-title a:hover, .card-title a:focus {
    color: var(--primary);
}

.card-excerpt {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 1.25rem;
    flex-grow: 1;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    transition: gap var(--transition-fast);
}

.card-link:hover, .card-link:focus {
    gap: 0.75rem;
    text-decoration: none;
}

/* ============================================================
   FEATURED SECTION
   ============================================================ */

.featured-section {
    background: linear-gradient(135deg, var(--primary-light), #f0e6ff);
    padding: 5rem 0;
}

.featured-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.featured-content h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--heading-color);
    margin-bottom: 1rem;
}

.featured-content h2 span {
    color: var(--primary);
}

.featured-content p {
    font-size: 1.05rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.featured-list {
    list-style: none;
    margin-bottom: 2rem;
}

.featured-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    color: var(--gray-700);
    font-size: 0.95rem;
}

.featured-list li i {
    color: var(--success);
    font-size: 1.1rem;
}

.featured-image {
    position: relative;
}

.featured-image img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
}

/* ============================================================
   NEWSLETTER SECTION
   ============================================================ */

.newsletter-section {
    background: linear-gradient(135deg, var(--dark), var(--darker));
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.newsletter-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(13,110,253,0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.newsletter-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 3rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.newsletter-text h2 {
    font-size: 2rem;
    font-weight: 800;
    color: white;
    margin-bottom: 1rem;
}

.newsletter-text h2 i {
    color: var(--primary);
    margin-right: 0.5rem;
}

.newsletter-text p {
    color: rgba(255,255,255,0.7);
    font-size: 1.05rem;
    line-height: 1.6;
}

.newsletter-form .form-group {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.newsletter-form input[type="email"] {
    flex: 1;
    padding: 1rem 1.25rem;
    border: 2px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    background: rgba(255,255,255,0.05);
    color: white;
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.newsletter-form input[type="email"]::placeholder {
    color: rgba(255,255,255,0.4);
}

.newsletter-form input[type="email"]:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255,255,255,0.08);
}

.newsletter-form .btn {
    white-space: nowrap;
}

.form-note {
    color: rgba(255,255,255,0.5);
    font-size: 0.8rem;
}

.form-note i {
    color: var(--success);
    margin-right: 0.35rem;
}

/* ============================================================
   BREADCRUMB
   ============================================================ */

.breadcrumb {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.breadcrumb ol {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--gray-600);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb a:hover, .breadcrumb a:focus {
    color: var(--primary);
}

.breadcrumb span {
    color: var(--gray-800);
    font-size: 0.875rem;
    font-weight: 600;
}

.breadcrumb-separator {
    color: var(--gray-400);
    font-size: 0.7rem;
}

/* ============================================================
   ARTICLE PAGE
   ============================================================ */

.article-page {
    padding-top: calc(var(--header-height) + 2rem);
}

.article-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    padding: 0 1rem;
}

.article-category {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 100px;
    margin-bottom: 1.25rem;
}

.article-title {
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--heading-color);
    line-height: 1.15;
    margin-bottom: 1.25rem;
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    color: var(--gray-500);
    font-size: 0.9rem;
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.article-meta i {
    color: var(--primary);
}

.article-featured-image {
    max-width: 900px;
    margin: 0 auto 3rem;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.article-featured-image img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.article-body {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--body-color);
}

.article-body h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--heading-color);
    margin: 2.5rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.article-body h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--heading-color);
    margin: 2rem 0 0.75rem;
}

.article-body h4 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--heading-color);
    margin: 1.5rem 0 0.5rem;
}

.article-body p {
    margin-bottom: 1.25rem;
}

.article-body ul, .article-body ol {
    margin: 1rem 0 1.25rem 1.5rem;
}

.article-body li {
    margin-bottom: 0.5rem;
}

.article-body li::marker {
    color: var(--primary);
}

.article-body blockquote {
    margin: 1.5rem 0;
    padding: 1.5rem 1.5rem 1.5rem 2rem;
    border-left: 4px solid var(--primary);
    background: var(--gray-100);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-style: italic;
    color: var(--gray-700);
}

.article-body blockquote p:last-child {
    margin-bottom: 0;
}

.article-body code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    padding: 0.2rem 0.4rem;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    color: var(--danger);
}

.article-body pre {
    background: var(--dark);
    color: #e2e8f0;
    padding: 1.5rem;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 1.5rem 0;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
}

.article-body pre code {
    background: none;
    color: inherit;
    padding: 0;
    font-size: inherit;
}

.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.95rem;
}

.article-body th, .article-body td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.article-body th {
    background: var(--gray-100);
    font-weight: 700;
    color: var(--heading-color);
}

.article-body tr:hover {
    background: var(--gray-100);
}

.article-body img {
    border-radius: var(--radius);
    margin: 1.5rem 0;
    box-shadow: var(--shadow);
}

.article-body .tip-box, .article-body .warning-box, .article-body .info-box {
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius);
    margin: 1.5rem 0;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.article-body .tip-box { background: #e8f5e9; border-left: 4px solid var(--success); }
.article-body .warning-box { background: #fff3e0; border-left: 4px solid var(--warning); }
.article-body .info-box { background: var(--primary-light); border-left: 4px solid var(--primary); }

.article-body .tip-box i, .article-body .warning-box i, .article-body .info-box i {
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 0.15rem;
}

.article-body .tip-box i { color: var(--success); }
.article-body .warning-box i { color: #e65100; }
.article-body .info-box i { color: var(--primary); }

.article-body .tip-box p:last-child,
.article-body .warning-box p:last-child,
.article-body .info-box p:last-child {
    margin-bottom: 0;
}

/* Table of Contents */
.toc {
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin: 2rem 0;
    border: 1px solid var(--border-color);
}

.toc-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--heading-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.toc-title i {
    color: var(--primary);
}

.toc ul {
    list-style: none;
    margin: 0;
}

.toc li {
    margin-bottom: 0.5rem;
}

.toc a {
    color: var(--gray-700);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.toc a:hover, .toc a:focus {
    color: var(--primary);
}

.toc a::before {
    content: '->';
    margin-right: 0.5rem;
    color: var(--gray-400);
}

/* FAQ Section for AEO */
.faq-section {
    max-width: 800px;
    margin: 3rem auto;
    padding: 0 1rem;
}

.faq-section h2 {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--heading-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    margin-bottom: 1rem;
    overflow: hidden;
    background: var(--lighter);
}

.faq-question {
    width: 100%;
    padding: 1.25rem 1.5rem;
    background: none;
    border: none;
    text-align: left;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--heading-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background var(--transition-fast);
}

.faq-question:hover, .faq-question:focus {
    background: var(--gray-100);
}

.faq-question i {
    color: var(--primary);
    transition: transform var(--transition-fast);
}

.faq-question[aria-expanded="true"] i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow), padding var(--transition);
}

.faq-answer.active {
    padding: 0 1.5rem 1.25rem;
    max-height: 500px;
}

.faq-answer p {
    color: var(--gray-600);
    line-height: 1.7;
    margin: 0;
}

/* Related Articles */
.related-articles {
    max-width: 900px;
    margin: 4rem auto 0;
    padding: 0 1rem;
}

.related-articles h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--heading-color);
    margin-bottom: 1.5rem;
}

/* Author Box */
.author-box {
    max-width: 800px;
    margin: 3rem auto;
    padding: 2rem;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.author-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #6610f2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    font-weight: 700;
    flex-shrink: 0;
}

.author-info h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--heading-color);
    margin-bottom: 0.5rem;
}

.author-info p {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.author-social {
    display: flex;
    gap: 0.75rem;
}

.author-social a {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--lighter);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    transition: all var(--transition-fast);
    border: 1px solid var(--border-color);
}

.author-social a:hover, .author-social a:focus {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* ============================================================
   CATEGORY PAGE
   ============================================================ */

.category-hero {
    padding: calc(var(--header-height) + 3rem) 0 3rem;
    background: linear-gradient(135deg, var(--darker), var(--dark));
    text-align: center;
    color: white;
}

.category-hero-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 1.5rem;
}

.category-hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.category-hero p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.7);
    max-width: 600px;
    margin: 0 auto;
}

.category-articles {
    padding: 3rem 0;
}

/* ============================================================
   TOOLS PAGE
   ============================================================ */

.tools-hero {
    padding: calc(var(--header-height) + 3rem) 0 3rem;
    background: linear-gradient(135deg, var(--darker), var(--dark));
    text-align: center;
    color: white;
}

.tools-hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.tools-hero p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.7);
    max-width: 600px;
    margin: 0 auto;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    padding: 3rem 0;
}

.tool-card {
    background: var(--lighter);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: all var(--transition);
    text-align: center;
}

.tool-card:hover, .tool-card:focus-within {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.tool-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius);
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin: 0 auto 1.25rem;
}

.tool-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--heading-color);
    margin-bottom: 0.5rem;
}

.tool-card p {
    font-size: 0.9rem;
    color: var(--gray-600);
    margin-bottom: 1.25rem;
    line-height: 1.5;
}

/* Tool Calculator Styles */
.calculator {
    background: var(--lighter);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border-color);
    max-width: 600px;
    margin: 0 auto;
}

.calculator h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--heading-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.calculator .form-group {
    margin-bottom: 1.25rem;
}

.calculator label {
    display: block;
    font-weight: 600;
    color: var(--heading-color);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.calculator input, .calculator select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.calculator input:focus, .calculator select:focus {
    outline: none;
    border-color: var(--primary);
}

.calculator .result-box {
    background: var(--primary-light);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-top: 1.5rem;
    text-align: center;
}

.calculator .result-box h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.calculator .result-box .result-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
}

/* ============================================================
   STATIC PAGES
   ============================================================ */

.page-hero {
    padding: calc(var(--header-height) + 3rem) 0 3rem;
    background: linear-gradient(135deg, var(--darker), var(--dark));
    text-align: center;
    color: white;
}

.page-hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.page-hero p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.7);
    max-width: 600px;
    margin: 0 auto;
}

.page-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 1rem;
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--body-color);
}

.page-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--heading-color);
    margin: 2.5rem 0 1rem;
}

.page-content h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--heading-color);
    margin: 2rem 0 0.75rem;
}

.page-content p {
    margin-bottom: 1.25rem;
}

.page-content ul, .page-content ol {
    margin: 1rem 0 1.25rem 1.5rem;
}

.page-content li {
    margin-bottom: 0.5rem;
}

/* Contact Page */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
    padding: 3rem 1rem;
}

.contact-info h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--heading-color);
    margin-bottom: 1rem;
}

.contact-info p {
    color: var(--gray-600);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.contact-item i {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--heading-color);
    margin-bottom: 0.25rem;
}

.contact-item p, .contact-item a {
    font-size: 0.9rem;
    color: var(--gray-600);
}

.contact-form {
    background: var(--lighter);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.contact-form h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--heading-color);
    margin-bottom: 1.5rem;
}

.contact-form .form-group {
    margin-bottom: 1.25rem;
}

.contact-form label {
    display: block;
    font-weight: 600;
    color: var(--heading-color);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
    background: var(--body-bg);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.contact-form textarea {
    min-height: 150px;
    resize: vertical;
}

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

.site-footer {
    background: var(--darker);
    color: rgba(255,255,255,0.7);
    padding: 4rem 0 0;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    text-decoration: none;
    margin-bottom: 1rem;
}

.footer-brand .footer-logo:hover {
    color: white;
    text-decoration: none;
}

.footer-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    color: rgba(255,255,255,0.6);
}

.footer-social {
    display: flex;
    gap: 0.75rem;
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.footer-social a:hover, .footer-social a:focus {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
}

.footer-links h3 {
    font-size: 1rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
    text-decoration: none;
}

.footer-links a:hover, .footer-links a:focus {
    color: white;
    text-decoration: none;
}

.footer-bottom {
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
}

.footer-bottom i {
    color: #e74c3c;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    font-size: 1.1rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover, .back-to-top:focus {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

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

@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    .hero-content { max-width: 100%; }
    .hero-actions { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-image { max-width: 600px; margin: 0 auto; }
    .hero-float { display: none; }
    .featured-grid { grid-template-columns: 1fr; gap: 2rem; }
    .newsletter-content { grid-template-columns: 1fr; gap: 2rem; text-align: center; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
        --container-padding: 1rem;
    }
    .nav-toggle { display: flex; }
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        align-items: stretch;
        padding: 1rem;
        gap: 0.25rem;
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
    }
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .nav-link {
        padding: 0.75rem 1rem;
        justify-content: space-between;
    }
    .nav-dropdown { position: static; }
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding: 0 0 0 1rem;
        display: none;
    }
    .nav-dropdown.active .dropdown-menu { display: block; }
    .hero { padding: calc(var(--header-height) + 2rem) 0 3rem; }
    .hero-title { font-size: 2.25rem; }
    .hero-desc { font-size: 1rem; }
    .hero-stats { gap: 1.5rem; }
    .hero-stat-number { font-size: 1.5rem; }
    .section { padding: 3rem 0; }
    .section-title { font-size: 1.75rem; }
    .categories-grid { grid-template-columns: 1fr; }
    .articles-grid { grid-template-columns: 1fr; }
    .article-title { font-size: 2rem; }
    .article-body { font-size: 1rem; }
    .article-body h2 { font-size: 1.5rem; }
    .article-body h3 { font-size: 1.2rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .author-box { flex-direction: column; text-align: center; align-items: center; }
    .newsletter-form .form-group { flex-direction: column; }
    .category-hero h1, .tools-hero h1, .page-hero h1 { font-size: 2rem; }
    .calculator .result-box .result-value { font-size: 2rem; }
    .back-to-top { bottom: 1rem; right: 1rem; width: 40px; height: 40px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.85rem; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }
    .hero-stats { flex-direction: column; gap: 1rem; }
    .section-title { font-size: 1.5rem; }
    .article-title { font-size: 1.65rem; }
    .card-title { font-size: 1rem; }
    .tools-grid { grid-template-columns: 1fr; }
    .calculator { padding: 1.5rem; }
}

@media print {
    .site-header, .site-footer, .newsletter-section, .back-to-top, .search-overlay {
        display: none !important;
    }
    body { background: white; color: black; }
    .article-body, .page-content { max-width: 100%; }
    a { color: black; text-decoration: underline; }
    .article-page { padding-top: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}

@media (prefers-contrast: high) {
    :root {
        --primary: #005fcc;
        --body-color: #000;
        --heading-color: #000;
        --border-color: #000;
    }
    .article-card, .category-card, .tool-card, .calculator, .contact-form {
        border-width: 2px;
    }
}