/* Article Single Page Styles */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #64748b;
  --accent: #f59e0b;
  --light: #f8fafc;
  --dark: #1e293b;
  --success: #10b981;
  --danger: #ef4444;
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --radius: 8px;
}

/* Article Breadcrumb */
.breadcrumb {
  background: var(--light);
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  color: var(--secondary);
}

.breadcrumb li:not(:last-child):after {
  content: "/";
  margin: 0 0.5rem;
  color: var(--secondary);
}

.breadcrumb a {
  color: var(--secondary);
  transition: color 0.3s ease;
}

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

/* Article Header */
.article-header {
  padding: 2rem 0 1rem;
  text-align: center;
}

.article-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.category-badge {
  background: var(--primary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
}

.read-time, .date {
  color: var(--secondary);
  font-size: 0.875rem;
}

.article-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--dark);
}

.article-excerpt {
  font-size: 1.125rem;
  color: var(--secondary);
  max-width: 800px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.article-author {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.article-author img {
  border-radius: 50%;
  object-fit: cover;
}

.author-name {
  font-weight: 600;
  color: var(--dark);
  display: block;
}

.author-title {
  font-size: 0.875rem;
  color: var(--secondary);
}

/* Article Featured Image */
.article-featured-image {
  margin: 2rem 0;
}

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

.image-caption {
  text-align: center;
  font-size: 0.875rem;
  color: var(--secondary);
  margin-top: 0.5rem;
  font-style: italic;
}

/* Article Content */
.article-content {
  padding: 2rem 0;
}

.content-wrapper {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3rem;
  align-items: start;
}

.main-content {
  max-width: 100%;
}

.social-sharing {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  padding: 1rem;
  background: var(--light);
  border-radius: var(--radius);
}

.social-sharing span {
  font-weight: 600;
  color: var(--dark);
}

.social-sharing a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: white;
  color: var(--primary);
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
}

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

/* Article Body */
.article-body {
  line-height: 1.8;
  color: var(--dark);
}

.article-body h2 {
  font-size: 1.75rem;
  font-weight: 600;
  margin: 2.5rem 0 1rem;
  color: var(--dark);
  position: relative;
  padding-left: 1rem;
  border-left: 4px solid var(--primary);
}

.article-body h3 {
  font-size: 1.375rem;
  font-weight: 600;
  margin: 2rem 0 1rem;
  color: var(--dark);
}

.article-body p {
  margin-bottom: 1.5rem;
}

.intro {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--dark);
  line-height: 1.7;
}

/* Info Box */
.info-box {
  background: #eff6ff;
  border-left: 4px solid var(--primary);
  padding: 1.5rem;
  border-radius: var(--radius);
  margin: 2rem 0;
}

.info-box h3 {
  margin-top: 0;
  color: var(--primary-dark);
}

.info-box ul {
  margin: 1rem 0;
}

.info-box li {
  margin-bottom: 0.5rem;
  padding-left: 0.5rem;
}

/* Stat Box */
.stat-box {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
  background: var(--light);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--secondary);
}

/* Comparison Table */
.comparison-table {
  margin: 2rem 0;
  overflow-x: auto;
}

.comparison-table h3 {
  margin-bottom: 1rem;
}

.comparison-table table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.comparison-table th,
.comparison-table td {
  padding: 1rem;
  text-align: left;
  border: 1px solid var(--border);
}

.comparison-table th {
  background: var(--primary);
  color: white;
  font-weight: 600;
}

.comparison-table tr:nth-child(even) {
  background: var(--light);
}

.comparison-table tr:hover {
  background: #e6f0ff;
}

/* Benefits Grid */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.benefit-item {
  text-align: center;
  padding: 1.5rem;
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
}

.benefit-item:hover {
  transform: translateY(-5px);
}

.benefit-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.benefit-item h4 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--dark);
}

.benefit-item p {
  font-size: 0.875rem;
  color: var(--secondary);
  margin-bottom: 0;
}

/* Case Study */
.case-study {
  background: #f0fdf4;
  border-left: 4px solid var(--success);
  padding: 1.5rem;
  border-radius: var(--radius);
  margin: 2rem 0;
}

.case-study h3 {
  color: var(--success);
  margin-top: 0;
}

.case-study ul {
  margin: 1rem 0;
}

.case-study li {
  margin-bottom: 0.5rem;
  padding-left: 0.5rem;
}

/* CTA Box */
.cta-box {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 2rem;
  border-radius: var(--radius);
  margin: 2rem 0;
  text-align: center;
}

.cta-box h3 {
  color: white;
  margin-top: 0;
}

.cta-box p {
  margin-bottom: 1.5rem;
  opacity: 0.9;
}

.cta-box .btn-primary {
  background: white;
  color: var(--primary);
  border: none;
}

.cta-box .btn-primary:hover {
  background: var(--light);
  transform: translateY(-2px);
}

/* Article Tags */
.article-tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 2rem 0;
  padding: 1rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.article-tags span {
  font-weight: 600;
  color: var(--dark);
}

.article-tags a {
  background: var(--light);
  color: var(--secondary);
  padding: 0.375rem 0.75rem;
  border-radius: 20px;
  font-size: 0.875rem;
  transition: all 0.3s ease;
}

.article-tags a:hover {
  background: var(--primary);
  color: white;
}

/* Social Sharing Bottom */
.social-sharing.bottom {
  margin: 2rem 0;
}

/* Author Bio */
.author-bio {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  padding: 2rem;
  background: var(--light);
  border-radius: var(--radius);
  margin: 2rem 0;
}

.author-bio img {
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.author-bio h3 {
  margin-top: 0;
  color: var(--dark);
}

.author-bio p {
  margin-bottom: 0;
  color: var(--secondary);
}

/* Newsletter */
.article-newsletter {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 2rem;
  border-radius: var(--radius);
  margin: 2rem 0;
}

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

.newsletter-content h3 {
  color: white;
  margin-top: 0;
}

.newsletter-content p {
  margin-bottom: 1.5rem;
  opacity: 0.9;
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.newsletter-form input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
}

.newsletter-form button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  transition: background 0.3s ease;
}

.newsletter-form button:hover {
  background: #e69008;
}

.disclaimer {
  font-size: 0.75rem;
  opacity: 0.7;
  margin-bottom: 0;
}

/* Related Articles */
.related-articles {
  margin: 3rem 0;
}

.related-articles h2 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--dark);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.related-item {
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
}

.related-item:hover {
  transform: translateY(-5px);
}

.related-item a {
  display: block;
  padding: 1.5rem;
  color: inherit;
  text-decoration: none;
}

.related-item h3 {
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
  color: var(--dark);
}

.related-item p {
  font-size: 0.875rem;
  color: var(--secondary);
  margin-bottom: 0;
}

/* Table of Contents */
.table-of-contents {
  position: sticky;
  top: 2rem;
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  overflow: hidden;
}

.toc-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.toc-header h3 {
  margin: 0;
  color: var(--dark);
}

#toc-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--primary);
  cursor: pointer;
  font-size: 1.25rem;
}

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

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

.toc-nav a {
  display: block;
  padding: 0.5rem 0.75rem;
  color: var(--secondary);
  text-decoration: none;
  border-radius: var(--radius);
  transition: all 0.3s ease;
  font-size: 0.875rem;
}

.toc-nav a:hover,
.toc-nav a.active {
  background: var(--primary-light);
  color: var(--primary);
  padding-left: 1rem;
}

/* Resource Download */
.resource-download {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.resource-download h3 {
  margin-top: 0;
  color: var(--dark);
}

.resource-download p {
  color: var(--secondary);
  margin-bottom: 1rem;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-download:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* Contact Section */
.contact-section {
  padding: 4rem 0;
  background: var(--light);
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-subtitle {
  display: block;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.875rem;
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--dark);
}

.section-description {
  font-size: 1.125rem;
  color: var(--secondary);
  max-width: 600px;
  margin: 0 auto;
}

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-form-container {
  background: white;
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.error-message {
  display: block;
  color: var(--danger);
  font-size: 0.875rem;
  margin-top: 0.25rem;
  min-height: 1.25rem;
}

.form-footer {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

.loading-spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top: 2px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.success-message {
  display: none;
  align-items: center;
  gap: 0.5rem;
  color: var(--success);
  font-weight: 600;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.info-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.info-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  flex-shrink: 0;
  font-size: 1.25rem;
}

.info-content h3 {
  margin: 0 0 0.5rem;
  color: var(--dark);
}

.info-content a,
.info-content address {
  color: var(--secondary);
  text-decoration: none;
  font-style: normal;
  transition: color 0.3s ease;
}

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

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

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--light);
  color: var(--primary);
  border-radius: 50%;
  transition: all 0.3s ease;
}

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

/* Responsive Design */
@media (max-width: 1024px) {
  .content-wrapper {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .table-of-contents {
    position: static;
    order: -1;
  }
  
  .contact-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .article-header h1 {
    font-size: 2rem;
  }
  
  .article-meta {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .stat-box {
    grid-template-columns: 1fr;
  }
  
  .benefits-grid {
    grid-template-columns: 1fr;
  }
  
  .author-bio {
    flex-direction: column;
    text-align: center;
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .form-footer {
    flex-direction: column;
    align-items: stretch;
  }
  
  .info-card {
    flex-direction: column;
    text-align: center;
  }
  
  .info-icon {
    align-self: center;
  }
}

@media (max-width: 640px) {
  .article-header h1 {
    font-size: 1.75rem;
  }
  
  .article-excerpt {
    font-size: 1rem;
  }
  
  .social-sharing {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .related-grid {
    grid-template-columns: 1fr;
  }
  
  .toc-header {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  
  #toc-toggle {
    display: block;
  }
  
  .toc-nav {
    display: none;
  }
  
  .toc-nav.active {
    display: block;
  }
}