/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --deep-navy: #0B1220;
    --signal-blue: #3AA7FF;
    --teal: #20C6B7;
    --graphite: #1A2230;
    --soft-gray: #A7B0BD;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.28);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.35);
    
    /* Transitions */
    --transition-fast: 160ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 220ms ease;
    
    /* Layout */
    --container-max-width: 1200px;
    --header-height: 80px;
    --border-radius: 16px;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--soft-gray);
    background-color: var(--deep-navy);
    overflow-x: hidden;
}

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

/* Preloader */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--deep-navy);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.node-mesh-loader {
    position: relative;
    width: 100px;
    height: 100px;
}

.node-mesh-loader .node {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--signal-blue);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--signal-blue), 0 0 20px var(--signal-blue);
    animation: nodeFloat 2s ease-in-out infinite;
}

.node-mesh-loader .node:nth-child(1) {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.node-mesh-loader .node:nth-child(2) {
    top: 20%;
    right: 10%;
    animation-delay: 0.4s;
}

.node-mesh-loader .node:nth-child(3) {
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    animation-delay: 0.8s;
}

.node-mesh-loader .node:nth-child(4) {
    bottom: 20%;
    right: 10%;
    animation-delay: 1.2s;
}

.node-mesh-loader .node:nth-child(5) {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 1.6s;
}

.node-mesh-loader .node:nth-child(6) {
    bottom: 20%;
    left: 10%;
    animation-delay: 2s;
}

@keyframes nodeFloat {
    0%, 100% {
        transform: translateY(0px) scale(1);
        opacity: 1;
    }
    50% {
        transform: translateY(-10px) scale(1.2);
        opacity: 0.8;
    }
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: rgba(11, 18, 32, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(58, 167, 255, 0.1);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav {
    height: 100%;
}

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

.nav-logo h2 {
    color: var(--signal-blue);
    font-weight: var(--font-weight-bold);
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--soft-gray);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--signal-blue);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--signal-blue);
    transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle .bar {
    width: 25px;
    height: 3px;
    background-color: var(--soft-gray);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    overflow: hidden;
}

.node-mesh-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(58, 167, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(32, 198, 183, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(58, 167, 255, 0.05) 0%, transparent 50%);
}

.node-mesh-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, var(--signal-blue) 1px, transparent 1px),
        radial-gradient(circle at 75% 75%, var(--teal) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.3;
    animation: meshFloat 20s ease-in-out infinite;
}

@keyframes meshFloat {
    0%, 100% {
        transform: translateX(0px) translateY(0px);
    }
    25% {
        transform: translateX(-10px) translateY(-5px);
    }
    50% {
        transform: translateX(10px) translateY(5px);
    }
    75% {
        transform: translateX(-5px) translateY(-10px);
    }
}

.hero-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: var(--font-weight-bold);
    line-height: 1.1;
    color: white;
    margin-bottom: var(--spacing-lg);
}

.highlight {
    background: linear-gradient(135deg, var(--signal-blue), var(--teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--soft-gray);
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--signal-blue);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--soft-gray);
    opacity: 0.8;
}

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

.hero-image {
    animation: fadeInRight 1s ease-out 0.3s both;
}

.dashboard-img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-slow);
}

.dashboard-img:hover {
    transform: translateY(-10px) scale(1.02);
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    display: inline-block;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1rem;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--signal-blue), var(--teal));
    color: white;
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: transparent;
    color: var(--signal-blue);
    border: 2px solid var(--signal-blue);
}

.btn-secondary:hover {
    background: var(--signal-blue);
    color: white;
}

/* Section Styles */
.section-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    text-align: center;
    color: white;
    margin-bottom: var(--spacing-2xl);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, var(--signal-blue), var(--teal));
    border-radius: 2px;
}

/* Advantages Section */
.advantages {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--graphite), var(--deep-navy));
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.advantage-item {
    background: rgba(26, 34, 48, 0.8);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid rgba(58, 167, 255, 0.1);
    transition: all var(--transition-normal);
    backdrop-filter: blur(20px);
}

.advantage-item:hover {
    transform: translateY(-5px);
    border-color: var(--signal-blue);
    box-shadow: var(--shadow-lg);
}

.advantage-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--signal-blue), var(--teal));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.advantage-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.advantage-item h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    color: white;
    margin-bottom: var(--spacing-sm);
}

.advantage-item p {
    color: var(--soft-gray);
    line-height: 1.6;
}

/* Featured Section */
.featured {
    padding: var(--spacing-2xl) 0;
}

.featured-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-lg);
}

.featured-card {
    background: var(--graphite);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid rgba(58, 167, 255, 0.1);
}

.featured-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--signal-blue);
}

.featured-main {
    grid-row: span 2;
}

.card-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.featured-main .card-image {
    height: 300px;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.featured-card:hover .card-image img {
    transform: scale(1.1);
}

.badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: var(--signal-blue);
    color: white;
}

.badge-advanced {
    background: var(--teal);
    color: white;
}

.badge-privacy {
    background: #ff6b6b;
    color: white;
}

.badge-beginner {
    background: #51cf66;
    color: white;
}

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

.card-content h3 {
    font-size: 1.3rem;
    font-weight: var(--font-weight-semibold);
    color: white;
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.card-content p {
    color: var(--soft-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

.read-time {
    color: var(--signal-blue);
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
}

.read-more {
    color: var(--signal-blue);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

.read-more:hover {
    color: var(--teal);
}

/* Categories Section */
.categories {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--deep-navy), var(--graphite));
}

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

.category-card {
    background: var(--graphite);
    border-radius: var(--border-radius);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-normal);
    border: 1px solid rgba(58, 167, 255, 0.1);
    display: block;
}

.category-card:hover {
    transform: translateY(-5px);
    border-color: var(--signal-blue);
    box-shadow: var(--shadow-lg);
}

.category-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.category-content {
    padding: var(--spacing-lg);
}

.category-content h3 {
    font-size: 1.4rem;
    font-weight: var(--font-weight-semibold);
    color: white;
    margin-bottom: var(--spacing-sm);
}

.category-content p {
    color: var(--soft-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.article-count {
    color: var(--signal-blue);
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
}

/* Popular Section */
.popular {
    padding: var(--spacing-2xl) 0;
}

.filter-chips {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.chip {
    padding: var(--spacing-xs) var(--spacing-md);
    background: transparent;
    color: var(--soft-gray);
    border: 1px solid rgba(58, 167, 255, 0.3);
    border-radius: 25px;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
}

.chip:hover,
.chip.active {
    background: var(--signal-blue);
    color: white;
    border-color: var(--signal-blue);
}

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

.article-card {
    background: var(--graphite);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid rgba(58, 167, 255, 0.1);
}

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

.article-card.hidden {
    display: none;
}

.category {
    color: var(--signal-blue);
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-xs);
}

/* Reviews Section */
.reviews {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--graphite), var(--deep-navy));
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.review-card {
    background: rgba(26, 34, 48, 0.8);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    border: 1px solid rgba(58, 167, 255, 0.1);
    transition: all var(--transition-normal);
    backdrop-filter: blur(20px);
}

.review-card:hover {
    transform: translateY(-5px);
    border-color: var(--signal-blue);
    box-shadow: var(--shadow-lg);
}

.review-content {
    margin-bottom: var(--spacing-lg);
}

.review-content p {
    font-style: italic;
    line-height: 1.6;
    color: var(--soft-gray);
}

.review-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--signal-blue), var(--teal));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: var(--font-weight-semibold);
}

.author-info h4 {
    color: white;
    font-weight: var(--font-weight-medium);
}

.author-info span {
    color: var(--soft-gray);
    font-size: 0.9rem;
}

.review-stars {
    display: flex;
    gap: 2px;
}

.star {
    color: #ffd700;
    font-size: 1.1rem;
}

/* Latest Section */
.latest {
    padding: var(--spacing-2xl) 0;
}

.latest-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.latest-article {
    background: var(--graphite);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid rgba(58, 167, 255, 0.1);
}

.latest-article:hover {
    transform: translateY(-5px);
    border-color: var(--signal-blue);
    box-shadow: var(--shadow-lg);
}

.article-image {
    height: 200px;
    overflow: hidden;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.latest-article:hover .article-image img {
    transform: scale(1.1);
}

.article-content {
    padding: var(--spacing-lg);
}

.article-date {
    color: var(--signal-blue);
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
    display: block;
    margin-bottom: var(--spacing-sm);
}

.article-content h3 {
    font-size: 1.2rem;
    font-weight: var(--font-weight-semibold);
    color: white;
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.article-content p {
    color: var(--soft-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

/* Newsletter Section */
.newsletter {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--signal-blue), var(--teal));
}

.newsletter-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.newsletter h2 {
    color: white;
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
}

.newsletter p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xl);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.newsletter-form input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.9);
}

.newsletter-form input:focus {
    outline: none;
    background: white;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.newsletter-success {
    display: none;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    color: white;
}

.newsletter-success.show {
    display: block;
}

/* Footer */
.footer {
    background: var(--graphite);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(58, 167, 255, 0.1);
}

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

.footer-section h3,
.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-weight: var(--font-weight-semibold);
}

.footer-section p {
    color: var(--soft-gray);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section ul li a {
    color: var(--soft-gray);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
    color: var(--signal-blue);
}

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

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(58, 167, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.social-links a:hover {
    background: var(--signal-blue);
    transform: translateY(-2px);
}

.contact-info p {
    margin-bottom: var(--spacing-sm);
}

.contact-info a {
    color: var(--signal-blue);
    text-decoration: none;
}

.contact-info a:hover {
    color: var(--teal);
}

.footer-bottom {
    border-top: 1px solid rgba(58, 167, 255, 0.1);
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--soft-gray);
}

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

.footer-links a {
    color: var(--soft-gray);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--signal-blue);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--signal-blue), var(--teal));
    color: white;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: rgba(11, 18, 32, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-xl);
        transition: left var(--transition-normal);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

    .featured-grid {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        justify-content: center;
    }

    .newsletter-form {
        flex-direction: column;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .advantage-item {
        padding: var(--spacing-lg);
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }
}

/* Category Pages Specific Styles */
.category-header {
    background: linear-gradient(135deg, var(--signal-blue), var(--teal));
    padding: var(--spacing-2xl) 0;
    text-align: center;
    color: white;
}

.category-header h1 {
    font-size: 3rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
}

.category-description {
    font-size: 1.3rem;
    max-width: 800px;
    margin: 0 auto;
    opacity: 0.9;
    line-height: 1.6;
}

.category-articles {
    padding: var(--spacing-2xl) 0;
}

.category-articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

/* Utility Classes */
.text-center {
    text-align: center;
}

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

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

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

/* Scroll Reveal Animation */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Print Styles */
@media print {
    .header,
    .nav-toggle,
    .back-to-top,
    .newsletter {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero {
        min-height: auto;
        padding: var(--spacing-lg) 0;
    }
}