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

:root {
    /* Colors */
    --primary: #3B82F6;
    --primary-dark: #2563EB;
    --secondary: #64748B;
    --accent: #10B981;
    --success: #22C55E;
    --warning: #F59E0B;
    --error: #EF4444;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --gray-50: #F8FAFC;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --gray-900: #0F172A;
    
    /* Dark Theme Colors */
    --dark-bg: #0F172A;
    --dark-surface: #1E293B;
    --dark-border: #334155;
    --dark-text: #F1F5F9;
    --dark-text-secondary: #94A3B8;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition: all 0.2s ease-in-out;
    --transition-slow: all 0.3s ease-in-out;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: var(--dark-bg);
    --bg-secondary: var(--dark-surface);
    --text-primary: var(--dark-text);
    --text-secondary: var(--dark-text-secondary);
    --border-color: var(--dark-border);
}

/* Light Theme (Default) */
[data-theme="light"], :root {
    --bg-primary: var(--white);
    --bg-secondary: var(--gray-50);
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --border-color: var(--gray-200);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: var(--transition);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-6);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--spacing-8);
    }
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: #0f172a;
    backdrop-filter: blur(12px);
    transition: var(--transition);
}

[data-theme="dark"] .header {
    background: #0f172a;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

/* Logo */
.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: white;
}

.logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: var(--spacing-2);
}

.logo-icon span {
    color: white;
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: white;
}

/* Navigation */
.nav-desktop {
    display: none;
}

@media (min-width: 768px) {
    .nav-desktop {
        display: block;
    }
}

.nav-desktop ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-8);
}

.nav-desktop a {
    text-decoration: none;
    color: white;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-desktop a:hover,
.nav-desktop a[aria-current="page"] {
    color: var(--primary);
}

.nav-desktop a[aria-current="page"]::after {
    content: '';
    position: absolute;
    bottom: -1.5rem;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.search-btn,
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-2);
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
}

.search-btn:hover,
.theme-toggle:hover {
    color: var(--primary);
    background: var(--bg-secondary);
}

/* Search Dropdown */
.search-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    width: 20rem;
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 100;
}

.search-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.search-dropdown input {
    width: 100%;
    padding: var(--spacing-3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.search-dropdown input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Theme Toggle */
.theme-toggle {
    position: relative;
}

.sun-icon,
.moon-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: var(--transition);
}

[data-theme="light"] .moon-icon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(180deg);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(180deg);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-2);
}

@media (min-width: 768px) {
    .mobile-menu-toggle {
        display: none;
    }
}

.mobile-menu-toggle span {
    width: 1.5rem;
    height: 2px;
    background: #FFFFFF;
    transition: var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Navigation */
.nav-mobile {
    display: none;
    padding: var(--spacing-4) 0;
    border-top: 1px solid var(--border-color);
}

.nav-mobile.active {
    display: block;
}

@media (min-width: 768px) {
    .nav-mobile {
        display: none !important;
    }
}

.nav-mobile ul {
    list-style: none;
}

.nav-mobile li {
    margin-bottom: var(--spacing-2);
}

.nav-mobile a {
    display: block;
    padding: var(--spacing-3);
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: var(--radius);
    transition: var(--transition);
}

.nav-mobile a:hover,
.nav-mobile a[aria-current="page"] {
    color: var(--primary);
    background: var(--bg-secondary);
}

/* Hero Section */
.hero {
    padding: var(--spacing-20) 0;
    background: linear-gradient(135deg, 
        rgba(59, 130, 246, 0.05) 0%, 
        rgba(255, 255, 255, 1) 50%, 
        rgba(16, 185, 129, 0.05) 100%);
    text-align: center;
}

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, 
        rgba(59, 130, 246, 0.1) 0%, 
        rgba(15, 23, 42, 1) 50%, 
        rgba(16, 185, 129, 0.1) 100%);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

/* Profile Card */
.profile-card {
    margin-bottom: var(--spacing-8);
    position: relative;
}

.profile-avatar {
    position: relative;
    display: inline-block;
}

.avatar-ring {
    width: 8rem;
    height: 8rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    padding: 4px;
    position: relative;
    animation: pulse 2s infinite;
}

.avatar-inner {
    width: 100%;
    height: 100%;
    background: black;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: white;
}

/* Floating Dots Animation */
.floating-dots {
    position: absolute;
    inset: -1rem;
    pointer-events: none;
}

.dot {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: bounce 2s infinite;
}

.dot-1 {
    top: 0;
    left: 0;
    background: var(--primary);
    animation-delay: 0s;
}

.dot-2 {
    top: 0;
    right: 0;
    background: var(--accent);
    animation-delay: 0.1s;
}

.dot-3 {
    bottom: 0;
    left: 0;
    background: #8B5CF6;
    animation-delay: 0.2s;
}

.dot-4 {
    bottom: 0;
    right: 0;
    background: #EC4899;
    animation-delay: 0.3s;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

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

/* Hero Typography */
.hero h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-6);
    line-height: 1.2;
}

@media (min-width: 768px) {
    .hero h1 {
        font-size: var(--font-size-6xl);
    }
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1rem;
    color: white;
    margin-bottom: var(--spacing-8);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Hero Actions */
.hero-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
    align-items: center;
}

@media (min-width: 640px) {
    .hero-actions {
        flex-direction: row;
        justify-content: center;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-primary svg {
    transition: var(--transition);
}

.btn-primary:hover svg {
    transform: translateX(2px);
}

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

.btn-secondary:hover {
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-12);
}

.section-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

/* Featured Section */
.featured-section {
    padding: var(--spacing-16) 0;
    background: var(--bg-primary);
}

/* Featured Slider */
.featured-slider {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.slider-container {
    overflow: hidden;
    border-radius: var(--radius-xl);
}

.slider-track {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.featured-slide {
    min-width: 100%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    padding: 1px;
    border-radius: var(--radius-xl);
}

.slide-content {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    display: flex;
    height: 24rem;
    overflow: hidden;
}

.slide-text {
    flex: 1;
    padding: var(--spacing-8);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.slide-image {
    flex: 1;
    display: none;
}

@media (min-width: 768px) {
    .slide-image {
        display: block;
    }
}

.slide-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slide-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.category {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.slide-meta time {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.slide-text h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
    line-height: 1.3;
}

@media (min-width: 768px) {
    .slide-text h3 {
        font-size: var(--font-size-3xl);
    }
}

.slide-text p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-6);
    line-height: 1.6;
}

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

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

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

.read-more:hover svg {
    transform: translateX(2px);
}

.read-time {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Slider Controls */
.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 3rem;
    height: 3rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    z-index: 10;
}

.slider-btn:hover {
    background: var(--bg-secondary);
    transform: translateY(-50%) scale(1.05);
}

.slider-prev {
    left: var(--spacing-4);
}

.slider-next {
    right: var(--spacing-4);
}

.slider-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2);
    margin-top: var(--spacing-8);
}

.slider-dots .dot {
    position: static;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray-300);
    cursor: pointer;
    transition: var(--transition);
    animation: none;
}

.slider-dots .dot.active {
    background: var(--primary);
}

.slider-dots .dot:hover {
    background: var(--gray-400);
}

.slider-dots .dot.active:hover {
    background: var(--primary-dark);
}

/* Content Section */
.content-section {
    padding: var(--spacing-16) 0;
    background: var(--bg-secondary);
}

.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.content-wrapper h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-8);
    color: var(--text-primary);
}

.content-grid {
    display: grid;
    gap: var(--spacing-8);
    text-align: left;
}

@media (min-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.content-column p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-6);
}

.content-column p:last-child {
    margin-bottom: 0;
}

/* Articles Section */
.articles-section {
    padding: var(--spacing-16) 0;
    background: var(--bg-secondary);
}

.articles-grid {
    display: grid;
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-12);
}

@media (min-width: 768px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

/* Article Cards */
.article-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

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

.card-image img {
    width: 100%;
    height: 12rem;
    object-fit: cover;
    transition: var(--transition);
}

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

.category-tag {
    position: absolute;
    top: var(--spacing-4);
    left: var(--spacing-4);
    background: var(--primary);
    color: white;
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.card-content {
    padding: var(--spacing-6);
}

.card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-3);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.card-content h3 {
    margin-bottom: var(--spacing-3);
}

.card-content h3 a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-size-xl);
    font-weight: 700;
    line-height: 1.3;
    transition: var(--transition);
}

.card-content h3 a:hover {
    color: var(--primary);
}

.card-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-4);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.author {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Load More */
.load-more-container {
    text-align: center;
}

.load-more-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: var(--spacing-3) var(--spacing-8);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.load-more-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* Pagination */
.pagination {
    padding: var(--spacing-8) 0;
    background: var(--bg-primary);
}

.pagination-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
}

.pagination-btn,
.pagination-number {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: var(--font-size-sm);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.pagination-btn:hover:not(:disabled),
.pagination-number:hover {
    background: var(--bg-secondary);
    border-color: var(--primary);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-number.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.pagination-numbers {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.pagination-ellipsis {
    color: var(--text-secondary);
    padding: var(--spacing-2);
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: var(--spacing-12) 0 var(--spacing-6);
    position: relative;
}

.footer-content {
    display: grid;
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-4);
}

.footer-logo .logo-icon {
    margin-right: var(--spacing-2);
}

.footer-logo .logo-text {
    color: white;
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

.footer-brand p {
    color: var(--gray-400);
    line-height: 1.6;
    margin-bottom: var(--spacing-6);
}

.social-links {
    display: flex;
    gap: var(--spacing-4);
}

.social-links a {
    color: var(--gray-400);
    transition: var(--transition);
}

.social-links a:hover {
    color: white;
    transform: translateY(-2px);
}

.footer-section h3 {
    color: white;
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
}

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

.footer-section li {
    margin-bottom: var(--spacing-2);
}

.footer-section a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: white;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--gray-400);
}

.contact-item svg {
    flex-shrink: 0;
}

/* Footer Bottom */
.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: var(--spacing-6);
}

.footer-bottom-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-4);
    text-align: center;
}

@media (min-width: 768px) {
    .footer-bottom-content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

.footer-bottom p {
    color: var(--gray-400);
    font-size: var(--font-size-sm);
}

.footer-links {
    display: flex;
    gap: var(--spacing-6);
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-6);
    right: var(--spacing-6);
    width: 3rem;
    height: 3rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 1000;
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 767px) {
    .hero {
        padding: var(--spacing-12) 0;
    }
    
    .hero h1 {
        font-size: var(--font-size-3xl);
    }
    
    .hero-description {
        font-size: var(--font-size-base);
    }
    
    .section-header h2 {
        font-size: var(--font-size-2xl);
    }
    
    .slide-content {
        height: auto;
        flex-direction: column;
    }
    
    .slide-text {
        padding: var(--spacing-6);
    }
    
    .slide-text h3 {
        font-size: var(--font-size-xl);
    }
    
    .slider-btn {
        display: none;
    }
    
    .content-wrapper h2 {
        font-size: var(--font-size-2xl);
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .pagination-content {
        flex-wrap: wrap;
        gap: var(--spacing-1);
    }
    
    .pagination-btn {
        font-size: var(--font-size-xs);
        padding: var(--spacing-2) var(--spacing-3);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* Focus Styles for Accessibility */
button:focus,
a:focus,
input:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .floating-dots .dot {
        animation: none;
    }
    
    .avatar-ring {
        animation: none;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .back-to-top,
    .slider-btn,
    .slider-dots,
    .pagination {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .hero,
    .featured-section,
    .content-section,
    .articles-section {
        padding: 1rem 0;
    }
}