:root {
  --background: hsl(220, 20%, 10%);
  --foreground: hsl(210, 20%, 92%);
  --card: hsl(220, 18%, 14%);
  --card-foreground: hsl(210, 20%, 92%);
  --primary: hsl(0, 72%, 51%);
  --primary-foreground: hsl(0, 0%, 100%);
  --secondary: hsl(220, 16%, 18%);
  --secondary-foreground: hsl(210, 20%, 85%);
  --muted-foreground: hsl(215, 12%, 55%);
  --border: hsl(220, 14%, 20%);
  --hero-gradient: linear-gradient(135deg, hsl(220, 20%, 8%) 0%, hsl(220, 18%, 14%) 50%, hsl(340, 20%, 12%) 100%);
  --radius: 0.5rem;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--background);
  color: var(--foreground);
  line-height: 1.5;
  min-height: 100vh;
}

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


.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header */
.header {
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}
.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}
.logo .accent { color: var(--primary); }
.nav {
  display: none;
  align-items: center;
  gap: 2rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}
.nav a:hover { color: var(--foreground); transition: color 0.2s; }
.nav a.active { color: var(--foreground); font-weight: 500; }
.btn-primary {
  background: var(--primary);
  color: var(--primary-foreground);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-weight: 500;
  transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.9; }
@media (min-width: 768px) {
  .nav { display: flex; }
}

/* Hero */
.hero {
  padding: 5rem 0;
  text-align: center;
  background: var(--hero-gradient);
}
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border: 1px solid hsla(0, 72%, 51%, 0.3);
  color: var(--primary);
  border-radius: 9999px;
  font-size: 0.75rem;
  margin-bottom: 1rem;
}
.hero h1 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.hero h1 .accent { color: var(--primary); }
.hero p {
  color: var(--muted-foreground);
  max-width: 42rem;
  margin: 0 auto;
  font-size: 1.125rem;
}
@media (min-width: 768px) {
  .hero h1 { font-size: 3rem; }
}

/* Categories */
.categories {
  border-bottom: 1px solid var(--border);
}
.categories-inner {
  display: flex;
  gap: 0.5rem;
  padding: 1rem 0;
  overflow-x: auto;
}
.cat-btn {
  background: var(--secondary);
  color: var(--secondary-foreground);
  padding: 0.375rem 1rem;
  border: none;
  border-radius: 9999px;
  font-size: 0.875rem;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.2s;
}
.cat-btn:hover { background: hsla(220, 16%, 18%, 0.8); }
.cat-btn.active {
  background: var(--primary);
  color: var(--primary-foreground);
}

/* Posts grid */
.posts {
  padding: 3rem 0;
}
.posts-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .posts-grid { grid-template-columns: 1fr 1fr; }
}

.card {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.3s;
  display: block;
}
.card:hover { border-color: hsla(0, 72%, 51%, 0.4); }
.card.featured { grid-column: 1 / -1; }
.card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.card-badge {
  font-size: 0.75rem;
  padding: 0.125rem 0.5rem;
  border: 1px solid hsla(0, 72%, 51%, 0.3);
  color: var(--primary);
  border-radius: 9999px;
}
.card-time {
  font-size: 0.75rem;
  color: var(--muted-foreground);
}
.card h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  transition: color 0.2s;
}
.card.featured h2 { font-size: 1.5rem; }
.card:hover h2 { color: var(--primary); }
.card p {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-date {
  font-size: 0.75rem;
  color: var(--muted-foreground);
}

/* Article */
.article {
  max-width: 48rem;
  margin: 0 auto;
  padding: 3rem 2rem;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-bottom: 2rem;
  transition: color 0.2s;
}
.back-link:hover { color: var(--foreground); }
.article-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.article h1 {
  font-size: 1.875rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}
@media (min-width: 768px) {
  .article h1 { font-size: 2.25rem; }
}
.article-content h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 2.5rem 0 1rem;
}
.article-content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
}
.article-content p {
  color: var(--muted-foreground);
  margin-bottom: 1.5rem;
}
.article-content ul,
.article-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--muted-foreground);
}
.article-content li { margin-bottom: 0.5rem; }
.article-content strong { color: var(--foreground); }

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

/* Not found */
.notfound {
  text-align: center;
  padding: 5rem 2rem;
}
.notfound h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.notfound a { color: var(--primary); }
.notfound a:hover { text-decoration: underline; }