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

:root {
  --primary-color: #667eea;
  --primary-dark: #5a6fd6;
  --secondary-color: #764ba2;
  --accent-color: #f093fb;
  --bg-light: #f0f4f8;
  --bg-white: #ffffff;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.7;
  color: var(--text-primary);
  background: linear-gradient(135deg, #f0f4f8 0%, #e8ecf0 100%);
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  padding: 2.5rem 0;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -25%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

header::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 60%;
  height: 60%;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
}

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

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.brand h1 {
  font-size: 2.5rem;
  margin-bottom: 0.3rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.brand h1 a {
  color: white;
  text-decoration: none;
}

.brand .tagline {
  font-size: 0.95rem;
  opacity: 0.9;
  font-weight: 300;
}

header nav {
  display: flex;
  gap: 2.5rem;
}

header nav a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: all 0.3s ease;
}

header nav a:hover {
  color: white;
  border-bottom-color: rgba(255, 255, 255, 0.5);
}

.search-bar {
  display: flex;
  gap: 0.5rem;
  max-width: 500px;
}

.search-bar input {
  flex: 1;
  padding: 0.875rem 1.25rem;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  outline: none;
  transition: box-shadow 0.3s;
}

.search-bar input:focus {
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.search-bar button {
  padding: 0.875rem 2rem;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  color: white;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
}

.search-bar button:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Main Layout */
.main-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2rem;
}

/* Main Content */
main {
  background: var(--bg-white);
  padding: 2rem;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
}

.page-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--border-color);
}

.page-header h1 {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.page-header .lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Post Grid */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* Post Card */
.post-card {
  background: linear-gradient(135deg, #fafbfc 0%, #f5f7fa 100%);
  border-radius: 16px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: all 0.3s ease;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.card-content {
  padding: 1.5rem;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.card-tag {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
}

.post-card h2 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.post-card h2 a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.3s;
}

.post-card h2 a:hover {
  color: var(--primary-color);
}

.post-card .excerpt {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.card-date {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.read-more {
  color: var(--primary-color);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.3s;
}

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

/* Sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.widget {
  background: var(--bg-white);
  padding: 1.5rem;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
}

.widget h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary-color);
}

/* Category List */
.category-list {
  list-style: none;
}

.category-list li {
  margin-bottom: 0.75rem;
}

.category-list a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem;
  display: block;
  border-radius: 8px;
  transition: all 0.3s;
}

.category-list a:hover {
  background: var(--bg-light);
  color: var(--primary-color);
  padding-left: 1rem;
}

/* Tag Cloud */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-cloud .tag-item {
  background: var(--bg-light);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s;
}

.tag-cloud .tag-item:hover {
  background: var(--primary-color);
  color: white;
}

/* Stats */
.stats {
  display: flex;
  justify-content: space-between;
}

.stat {
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Article Content */
.article-content {
  max-width: 100%;
}

.article-content h1 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

.article-content h2 {
  font-size: 1.4rem;
  margin: 2rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
}

.article-content h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.75rem;
}

.article-content p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.article-content ul,
.article-content ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

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

.article-content code {
  background: #f4f6f8;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  font-family: 'Fira Code', monospace;
  font-size: 0.9rem;
  color: var(--secondary-color);
}

.article-content pre {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: #e2e8f0;
  padding: 1.5rem;
  border-radius: 12px;
  overflow-x: auto;
  margin: 1.5rem 0;
}

.article-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
}

.article-content th,
.article-content td {
  border: 1px solid var(--border-color);
  padding: 0.8rem;
  text-align: left;
}

.article-content th {
  background: var(--bg-light);
  font-weight: 600;
}

/* Footer */
footer {
  background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
  color: var(--text-muted);
  padding: 3rem 0;
  margin-top: 3rem;
  border-top: 4px solid var(--primary-color);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  color: white;
  margin-bottom: 1rem;
}

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

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.3s;
}

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

.footer-section .social-links {
  display: flex;
  gap: 1.5rem;
}

.copyright {
  text-align: center;
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 900px) {
  .main-layout {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    order: -1;
  }
  
  .post-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .brand h1 {
    font-size: 2rem;
  }
  
  header {
    padding: 2rem 0;
  }
  
  main {
    padding: 1.5rem;
  }
  
  .search-bar {
    max-width: 100%;
  }
}

/* Article Detail Page */
.article-card {
  background: white;
  border-radius: 24px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  border: 1px solid #e2e8f0;
  overflow: hidden;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1.5rem 2rem 0;
  font-size: 0.875rem;
  color: #64748b;
}

.breadcrumbs a {
  color: #6366f1;
  text-decoration: none;
  transition: color 0.2s;
}

.breadcrumbs a:hover {
  color: #4f46e5;
  text-decoration: underline;
}

.breadcrumbs span {
  color: #94a3b8;
}

.article-header {
  padding: 2rem;
  border-bottom: 1px solid #e2e8f0;
}

.author-badge {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  border-radius: 12px;
  border: 1px solid #bae6fd;
}

.author-avatar {
  font-size: 2rem;
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-weight: 600;
  color: #1e293b;
  font-size: 0.95rem;
}

.author-title {
  font-size: 0.8rem;
  color: #64748b;
}

.update-badge {
  margin-left: auto;
  font-size: 0.8rem;
  color: #94a3b8;
  padding: 0.5rem 1rem;
  background: white;
  border-radius: 20px;
  border: 1px solid #e2e8f0;
}

.article-tag {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: #eef2ff;
  color: #4f46e5;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

.article-title {
  font-size: 2rem;
  font-weight: 800;
  color: #1e293b;
  line-height: 1.3;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

@media (min-width: 768px) {
  .article-title {
    font-size: 2.5rem;
  }
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  font-size: 0.9rem;
  color: #94a3b8;
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.article-content {
  padding: 2rem;
  line-height: 1.8;
  color: #475569;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1e293b;
  margin: 2.5rem 0 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid #e2e8f0;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #334155;
  margin: 2rem 0 1rem;
}

.article-content p {
  margin-bottom: 1.25rem;
  text-align: justify;
}

.article-content ul,
.article-content ol {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.article-content li {
  margin-bottom: 0.75rem;
  position: relative;
}

.article-content ul li::marker {
  color: #6366f1;
}

.article-content code {
  background: #f8fafc;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  font-family: 'Fira Code', monospace;
  font-size: 0.9rem;
  color: #7c3aed;
}

.article-content pre {
  background: linear-gradient(135deg, #1e1e2e 0%, #2d2d44 100%);
  color: #cdd6f4;
  padding: 1.5rem;
  border-radius: 16px;
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid #313244;
}

.article-content pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: 0.875rem;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.article-content th {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  color: white;
  padding: 1rem;
  text-align: left;
  font-weight: 600;
}

.article-content td {
  padding: 1rem;
  border-bottom: 1px solid #e2e8f0;
}

.article-content tr:hover td {
  background: #f8fafc;
}

.affiliate-card {
  margin: 2rem;
  padding: 1.5rem;
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border-radius: 16px;
  border: 1px solid #fcd34d;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.affiliate-icon {
  font-size: 2.5rem;
}

.affiliate-content h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #92400e;
  margin-bottom: 0.25rem;
}

.affiliate-content p {
  font-size: 0.9rem;
  color: #b45309;
  margin: 0;
}

.affiliate-button {
  margin-left: auto;
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: white;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.affiliate-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.feedback-section {
  margin: 2rem;
  padding: 1.5rem;
  background: #f8fafc;
  border-radius: 12px;
}

.feedback-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: #334155;
  margin-bottom: 1rem;
}

.feedback-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.feedback-btn {
  padding: 0.6rem 1.5rem;
  border: 2px solid #cbd5e1;
  border-radius: 10px;
  background: white;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.feedback-btn:hover {
  border-color: #6366f1;
  color: #6366f1;
}

.feedback-btn.positive.selected,
.feedback-btn.positive:hover {
  background: #dcfce7;
  border-color: #22c55e;
  color: #166534;
}

.feedback-btn.negative.selected,
.feedback-btn.negative:hover {
  background: #fee2e2;
  border-color: #ef4444;
  color: #991b1b;
}

.feedback-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.feedback-thanks {
  font-size: 0.875rem;
  color: #22c55e;
  font-weight: 500;
}

.related-articles {
  margin: 2rem;
  padding: 1.5rem;
  background: #f8fafc;
  border-radius: 12px;
}

.related-articles h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 1rem;
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.related-item a {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  background: white;
  border-radius: 10px;
  color: #334155;
  text-decoration: none;
  transition: all 0.2s;
  border: 1px solid #e2e8f0;
}

.related-item a::before {
  content: '→';
  margin-right: 0.75rem;
  color: #6366f1;
}

.related-item a:hover {
  background: #eff6ff;
  border-color: #6366f1;
  padding-left: 1.25rem;
}

.article-footer {
  margin: 0 2rem 2rem;
  padding: 1.5rem;
  background: #f8fafc;
  border-radius: 12px;
  font-size: 0.875rem;
  color: #64748b;
  line-height: 1.6;
}

/* Slate color scheme for body background */
.bg-slate-50 {
  background-color: #f8fafc;
}

@media (max-width: 768px) {
  .article-header,
  .article-content {
    padding: 1.5rem;
  }
  
  .article-footer {
    margin: 0 1.5rem 1.5rem;
    padding: 1rem;
  }
  
  .article-title {
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
  header nav {
    flex-wrap: wrap;
    gap: 1rem;
  }
  
  .post-grid {
    grid-template-columns: 1fr;
  }
}