/* Wivrix Global Styles */
/* Modern, Professional Design System */

:root {
  /* Colors */
  --primary: #667eea;
  --primary-dark: #5568d3;
  --secondary: #764ba2;
  --accent: #f093fb;
  --text-dark: #1a202c;
  --text-medium: #4a5568;
  --text-light: #718096;
  --bg-light: #f7fafc;
  --bg-white: #ffffff;
  --border: #e2e8f0;
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-lg: rgba(0, 0, 0, 0.15);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  
  /* Transitions */
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  line-height: 1.7;
  color: var(--text-dark);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--text-dark);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }

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

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

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

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

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

/* Header */
header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  padding: var(--spacing-xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

header .container {
  position: relative;
  z-index: 1;
}

header h1 {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-sm);
  text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

header p {
  font-size: 1.5rem;
  opacity: 0.95;
  color: white;
}

/* Navigation */
nav {
  background: var(--bg-white);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px var(--shadow);
  border-bottom: 1px solid var(--border);
}

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

nav .logo {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
}

nav .logo img {
  height: 40px;
  margin-right: var(--spacing-sm);
}

nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
  margin: 0;
}

nav a {
  color: var(--text-medium);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

nav a:hover {
  color: var(--primary);
  background: var(--bg-light);
}

/* Mobile Navigation */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.nav-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--text-dark);
  margin: 5px 0;
  transition: var(--transition);
  border-radius: 2px;
}

/* Main Content */
main {
  padding: var(--spacing-2xl) 0;
  min-height: 60vh;
}

/* Hero Section */
.hero {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  padding: var(--spacing-2xl) var(--spacing-lg);
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  box-shadow: 0 4px 20px var(--shadow);
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto;
  color: var(--text-medium);
}

/* Feature Cards */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-2xl) 0;
}

.feature {
  background: var(--bg-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 20px var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
}

.feature:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px var(--shadow-lg);
  border-color: var(--primary);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.feature h3 {
  color: var(--text-dark);
  margin-bottom: var(--spacing-sm);
  font-size: 1.5rem;
}

.feature p {
  color: var(--text-medium);
  line-height: 1.7;
}

/* Blog Posts */
.blog-posts {
  margin-top: var(--spacing-2xl);
}

.blog-posts h2 {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  font-size: 2.5rem;
}

.post {
  background: var(--bg-white);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 20px var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
}

.post:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px var(--shadow-lg);
}

.post h3 {
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
  font-size: 1.75rem;
}

.post h3 a {
  color: var(--primary);
  text-decoration: none;
}

.post h3 a:hover {
  color: var(--primary-dark);
}

.post-meta {
  color: var(--text-light);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.post-meta span {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.post-excerpt {
  color: var(--text-medium);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary);
  font-weight: 600;
  padding: var(--spacing-xs) 0;
  transition: var(--transition);
}

.read-more:hover {
  gap: 0.75rem;
  color: var(--primary-dark);
}

/* Blog Header */
.blog-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  padding: var(--spacing-2xl) 0;
  margin-bottom: var(--spacing-2xl);
  text-align: center;
}

.blog-header h1 {
  color: white;
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.blog-header p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Categories Grid */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.category-card {
  background: var(--bg-white);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}

.category-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px var(--shadow-lg);
}

.category-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.category-icon.dev-tools {
  background: #d1fae5;
}

.category-icon.ai-guides {
  background: #e9d5ff;
}

.category-icon.web-dev {
  background: #dbeafe;
}

.category-card h2 {
  color: var(--text-dark);
  margin-bottom: var(--spacing-sm);
  font-size: 1.5rem;
}

.category-card p {
  color: var(--text-medium);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.article-count {
  display: inline-block;
  background: var(--bg-light);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-light);
  font-weight: 600;
}

/* Featured Section */
.featured-section {
  margin-bottom: var(--spacing-2xl);
}

.featured-section h2 {
  color: var(--primary);
  margin-bottom: var(--spacing-lg);
  font-size: 2rem;
  padding-bottom: var(--spacing-sm);
  border-bottom: 3px solid var(--primary);
}

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

.featured-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: var(--transition);
}

.featured-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px var(--shadow);
}

.featured-card h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.25rem;
}

.featured-card h3 a {
  color: var(--text-dark);
  text-decoration: none;
}

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

.featured-meta {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--text-light);
}

.featured-card p {
  color: var(--text-medium);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

/* Newsletter Section */
.newsletter-section {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
  border: 2px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  margin: var(--spacing-2xl) 0;
}

.newsletter-section h2 {
  color: var(--primary);
  margin-bottom: var(--spacing-md);
}

.newsletter-section p {
  color: var(--text-medium);
  margin-bottom: var(--spacing-lg);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.newsletter-form {
  display: flex;
  gap: var(--spacing-sm);
  max-width: 500px;
  margin: 0 auto;
}

.newsletter-form input {
  flex: 1;
  padding: var(--spacing-md);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1rem;
}

.newsletter-form button {
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.newsletter-form button:hover {
  background: var(--primary-dark);
}

/* Article Header */
.article-header {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  padding: var(--spacing-2xl) 0;
  margin-bottom: var(--spacing-2xl);
}

.article-header.article-tools {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.article-header.article-ai {
  background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
}

.article-header.article-web {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.article-header h1 {
  color: white;
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.article-meta {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1rem;
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Breadcrumb */
.breadcrumb {
  background: var(--bg-light);
  padding: var(--spacing-sm) var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  font-size: 0.875rem;
}

.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* Article Content */
.article-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.article-content h2 {
  color: var(--primary);
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
  font-size: 2rem;
  padding-bottom: var(--spacing-sm);
  border-bottom: 3px solid var(--primary);
}

.article-content h3 {
  color: var(--text-dark);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}

.article-content p {
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
  color: var(--text-medium);
}

.article-content ul,
.article-content ol {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-xl);
}

.article-content li {
  margin-bottom: var(--spacing-sm);
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-medium);
}

.article-content strong {
  color: var(--text-dark);
  font-weight: 600;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  padding-left: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  font-style: italic;
  color: var(--text-light);
  font-size: 1.25rem;
  background: var(--bg-light);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
}

.article-content pre {
  background: #1a202c;
  color: #e2e8f0;
  padding: var(--spacing-lg);
  padding-top: 48px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  overflow-y: hidden;
  margin: var(--spacing-lg) 0;
  font-size: 0.9rem;
  line-height: 1.6;
}

.article-content code {
  font-family: var(--font-mono);
}

.article-content p code {
  background: var(--bg-light);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  color: var(--primary);
  font-size: 0.9em;
}

/* Copy Button for Code Blocks */
.article-content pre {
  position: relative;
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 32px;
  height: 32px;
  background: #2d3748;
  border: 1px solid #4a5568;
  color: #e2e8f0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: background 0.15s, border-color 0.15s;
  z-index: 1;
  opacity: 1 !important;
  visibility: visible !important;
}

.copy-btn:hover {
  background: #4a5568;
  border-color: #718096;
}

.copy-btn.copied {
  background: #065f46;
  border-color: #10b981;
  color: #10b981;
}

.copy-btn svg {
  width: 16px;
  height: 16px;
  display: block;
}

/* Problem/Solution Boxes */
.problem-box {
  background: #fef2f2;
  border: 2px solid #ef4444;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.problem-box h3 {
  color: #dc2626;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.solution-box {
  background: #f0fdf4;
  border: 2px solid #10b981;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.solution-box h3 {
  color: #059669;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Warning Box */
.warning-box {
  background: #fffbeb;
  border: 2px solid #f59e0b;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.warning-box h3 {
  color: #d97706;
  margin-bottom: var(--spacing-md);
}

/* Info Box */
.info-box {
  background: #eff6ff;
  border: 2px solid #3b82f6;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.info-box h3 {
  color: #2563eb;
  margin-bottom: var(--spacing-md);
}

/* Tip Box */
.tip-box {
  background: #f5f3ff;
  border: 2px solid #8b5cf6;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.tip-box h3 {
  color: #7c3aed;
  margin-bottom: var(--spacing-md);
}

/* Option Boxes */
.option-box {
  background: var(--bg-white);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.option-box h3 {
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.option-box .rank {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

/* Footer */
footer {
  background: var(--text-dark);
  color: white;
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

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

footer h4 {
  color: white;
  margin-bottom: var(--spacing-md);
  font-size: 1.25rem;
}

footer p {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
}

footer ul {
  list-style: none;
}

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

footer a {
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}

footer a:hover {
  color: white;
}

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

.social-links a {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

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

.footer-bottom {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.875rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
  color: white;
}

/* Code Blocks */
pre {
  background: var(--text-dark);
  color: #e2e8f0;
  padding: var(--spacing-lg);
  padding-top: 48px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  overflow-y: hidden;
  margin: var(--spacing-md) 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
}

code {
  background: var(--bg-light);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--primary);
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
}

/* Solution Number Badge */
.solution-number {
  background: #10b981;
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

/* Comparison Tables */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-xl) 0;
  font-size: 0.95rem;
}

.comparison-table th {
  background: var(--bg-light);
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--border);
}

.comparison-table td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.comparison-table tr:hover {
  background: var(--bg-light);
}

.winner {
  background: #d1fae5;
  font-weight: 600;
}

/* AI Cards */
.ai-card {
  background: var(--bg-white);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-lg) 0;
  transition: var(--transition);
}

.ai-card:hover {
  border-color: var(--primary);
  box-shadow: 0 8px 20px var(--shadow);
}

.ai-card h3 {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.ai-badge {
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
}

.badge-chatgpt {
  background: #10a37f;
  color: white;
}

.badge-claude {
  background: #d97706;
  color: white;
}

.badge-gemini {
  background: #4285f4;
  color: white;
}

/* Star Ratings */
.rating {
  display: flex;
  gap: 0.25rem;
  margin: var(--spacing-sm) 0;
}

.star {
  color: #fbbf24;
  font-size: 1.25rem;
}

.star.empty {
  color: #d1d5db;
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* Loading State */
.loading {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-light);
}

.loading::after {
  content: '...';
  animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
  0%, 20% { content: '.'; }
  40% { content: '..'; }
  60%, 100% { content: '...'; }
}

/* ============================================
   RESPONSIVE STYLES
   ============================================ */

/* Mobile nav drawer - hidden by default, visible via toggle */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
    z-index: 101;
  }
  
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
  
  nav ul {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-white);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: 80px;
    gap: var(--spacing-lg);
    box-shadow: -4px 0 20px var(--shadow);
    transition: right 0.3s ease;
    z-index: 100;
  }
  
  nav ul.active {
    right: 0;
  }
  
  nav ul li {
    width: 100%;
    text-align: center;
  }
  
  nav a {
    display: block;
    padding: var(--spacing-md);
    font-size: 1.125rem;
  }
  
  .nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 99;
  }
  
  .nav-overlay.active {
    display: block;
  }
}

/* Phones: 480px and below */
@media (max-width: 480px) {
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.35rem; }
  h3 { font-size: 1.2rem; }
  h4 { font-size: 1.1rem; }
  
  header {
    padding: var(--spacing-lg) 0;
  }
  
  header h1 {
    font-size: 2rem;
  }
  
  header p {
    font-size: 1rem;
  }
  
  main {
    padding: var(--spacing-lg) 0;
  }
  
  .hero {
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
  }
  
  .hero h2 {
    font-size: 1.5rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .features {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
  }
  
  .feature {
    padding: var(--spacing-lg);
  }
  
  .feature-icon {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
  }
  
  .blog-posts h2,
  .featured-section h2 {
    font-size: 1.5rem;
  }
  
  .post {
    padding: var(--spacing-lg);
  }
  
  .post h3 {
    font-size: 1.25rem;
  }
  
  .post-meta {
    flex-direction: column;
    gap: 0.25rem;
  }
  
  .blog-header {
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
  }
  
  .blog-header h1 {
    font-size: 1.75rem;
  }
  
  .blog-header p {
    font-size: 1rem;
  }
  
  .categories-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .category-card {
    padding: var(--spacing-lg);
  }
  
  .category-icon {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
  }
  
  .featured-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .featured-card {
    padding: var(--spacing-lg);
  }
  
  .featured-card h3 {
    font-size: 1.125rem;
  }
  
  .featured-meta {
    flex-direction: column;
    gap: 0.25rem;
  }
  
  .newsletter-section {
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
  }
  
  .newsletter-form {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .newsletter-form input,
  .newsletter-form button {
    width: 100%;
    text-align: center;
  }
  
  .article-header {
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
  }
  
  .article-header h1 {
    font-size: 1.5rem;
  }
  
  .article-meta {
    flex-direction: column;
    gap: 0.25rem;
  }
  
  .article-content h2 {
    font-size: 1.35rem;
    margin-top: var(--spacing-lg);
  }
  
  .article-content h3 {
    font-size: 1.2rem;
  }
  
  .article-content p,
  .article-content li {
    font-size: 1rem;
  }
  
  .article-content pre {
    padding: var(--spacing-sm);
    padding-top: 48px;
    font-size: 0.75rem;
    margin-left: calc(-1 * var(--spacing-sm));
    margin-right: calc(-1 * var(--spacing-sm));
    max-width: calc(100vw - var(--spacing-sm));
  }
  
  .article-content pre code {
    white-space: pre-wrap;
    word-break: break-all;
  }
  
  .problem-box,
  .solution-box,
  .warning-box,
  .info-box,
  .tip-box,
  .option-box {
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
  }
  
  .comparison-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    font-size: 0.85rem;
  }
  
  .comparison-table th,
  .comparison-table td {
    padding: var(--spacing-sm);
    white-space: nowrap;
  }
  
  .ai-card {
    padding: var(--spacing-lg);
  }
  
  .article-content img {
    max-width: 100%;
    height: auto;
  }
  
  .solution-number {
    width: 28px;
    height: 28px;
    font-size: 0.85rem;
  }
  
  .star-rating {
    font-size: 0.85rem;
  }
  
  footer {
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-lg);
  }
  
  footer .container {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    text-align: center;
  }
  
  .social-links {
    justify-content: center;
  }
}

/* Tablets: 481px - 768px */
@media (min-width: 481px) and (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.65rem; }
  h3 { font-size: 1.35rem; }
  
  header h1 {
    font-size: 2.5rem;
  }
  
  .hero h2 {
    font-size: 2rem;
  }
  
  .features {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .featured-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  footer .container {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Large screens (desktops) */
@media (min-width: 769px) and (max-width: 1024px) {
  .features {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .featured-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Extra large screens */
@media (min-width: 1025px) {
  .featured-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
  .feature:hover,
  .post:hover,
  .category-card:hover,
  .featured-card:hover {
    transform: none;
  }
  
  a, button {
    min-height: 44px;
    min-width: 44px;
  }
}

/* Print styles */
@media print {
  nav, footer, .newsletter-section {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .container {
    max-width: 100%;
    padding: 0;
  }
  
  pre {
    white-space: pre-wrap;
    word-wrap: break-word;
  }
}