/* CSS Variables - Unique color scheme derived from site name */
:root {
  --primary: hsl(177, 82%, 52%);
  --primary-dark: hsl(177, 82%, 42%);
  --primary-light: hsl(177, 82%, 62%);
  --text: #1a1a2e;
  --text-light: #666;
  --bg: #ffffff;
  --bg-alt: #f8f9fa;
  --header-bg: #1a1a2e;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.15);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text);
  background: var(--bg-alt);
  line-height: 1.6;
}

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

a {
  text-decoration: none;
  color: inherit;
}

/* Header */
header {
  background: var(--header-bg);
  color: white;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.75rem;
  font-weight: 800;
  color: white;
  letter-spacing: -0.5px;
}

.logo span {
  color: var(--primary);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

nav a {
  color: white;
  font-weight: 500;
  transition: color 0.3s;
}

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

/* Main Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* Hero Section */
.hero {
  position: relative;
  height: 500px;
  margin-bottom: 3rem;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

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

.hero-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
  padding: 3rem 2rem 2rem;
  color: white;
}

.hero .category-badge {
  margin-bottom: 0.75rem;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.hero .excerpt {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.9);
  margin-bottom: 1rem;
}

.hero .meta {
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
}

/* Category Badge */
.category-badge {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Layout Grid */
.main-content {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 3rem;
}

/* Article Grid */
.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}

/* Article Card */
.article-card {
  background: var(--bg);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

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

.article-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.article-card-content {
  padding: 1.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.article-card .category-badge {
  margin-bottom: 0.75rem;
}

.article-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.3;
  color: var(--text);
}

.article-card .excerpt {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  flex-grow: 1;
}

.article-card .meta {
  color: var(--text-light);
  font-size: 0.85rem;
  border-top: 1px solid var(--bg-alt);
  padding-top: 0.75rem;
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 100px;
  height: fit-content;
}

.sidebar-section {
  background: var(--bg);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

.sidebar-section h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--text);
  border-bottom: 3px solid var(--primary);
  padding-bottom: 0.5rem;
}

.trending-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--bg-alt);
}

.trending-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.trending-number {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.trending-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.trending-item:hover h4 {
  color: var(--primary);
}

/* Category Page */
.category-header {
  text-align: center;
  margin-bottom: 3rem;
  padding: 3rem 0;
  background: var(--bg);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.category-header h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text);
}

.category-header p {
  font-size: 1.2rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* Article Page */
.article-header {
  max-width: 800px;
  margin: 0 auto 3rem;
  text-align: center;
}

.article-header .category-badge {
  margin-bottom: 1.5rem;
}

.article-header h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.article-meta {
  color: var(--text-light);
  font-size: 1rem;
  margin-bottom: 2rem;
}

.article-meta span {
  margin: 0 0.5rem;
}

.article-image {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto 3rem;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.article-image img {
  width: 100%;
  height: auto;
}

.article-content {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg);
  padding: 3rem;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.article-content p {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
  color: var(--text);
}

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

/* Related Articles */
.related-articles {
  max-width: 1000px;
  margin: 3rem auto 0;
}

.related-articles h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--text);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

/* Back Link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 2rem;
  transition: gap 0.3s;
}

.back-link:hover {
  gap: 0.75rem;
}

/* Footer */
footer {
  background: var(--header-bg);
  color: white;
  padding: 3rem 0 1.5rem;
  margin-top: 4rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.footer-section h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--primary);
}

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

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

.footer-section a {
  color: rgba(255,255,255,0.8);
  transition: color 0.3s;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.6);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

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

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

@media (max-width: 768px) {
  nav ul {
    gap: 1rem;
    font-size: 0.9rem;
  }

  .hero {
    height: 400px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero .excerpt {
    font-size: 1rem;
  }

  .article-header h1 {
    font-size: 2rem;
  }

  .article-content {
    padding: 2rem 1.5rem;
  }

  .category-header h1 {
    font-size: 2rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  nav ul {
    display: none;
  }

  .hero {
    height: 300px;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .hero-overlay {
    padding: 2rem 1rem 1rem;
  }

  .article-content {
    padding: 1.5rem 1rem;
  }

  .article-content p {
    font-size: 1rem;
  }
}