/* Knowledge Hub Styles */
:root {
  --primary-color: #2563eb;
  --text-color: #1f2937;
  --bg-color: #ffffff;
  --card-bg: #f9fafb;
  --border-color: #e5e7eb;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 1.75rem;
  font-weight: 600;
}

header p {
  color: #6b7280;
  margin-top: 0.5rem;
}

nav {
  margin-top: 1rem;
}

nav a {
  color: var(--primary-color);
  text-decoration: none;
  margin-right: 1.5rem;
}

nav a:hover {
  text-decoration: underline;
}

main {
  min-height: 60vh;
}

h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

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

.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  transition: box-shadow 0.2s;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

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

.card h3 a:hover {
  text-decoration: underline;
}

.card p {
  font-size: 0.875rem;
  color: #6b7280;
}

.tag {
  display: inline-block;
  background: #e0e7ff;
  color: #3730a3;
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  margin-top: 0.75rem;
}

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.875rem;
  color: #6b7280;
}

/* Document page styles */
article {
  max-width: 800px;
}

article h1 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

article h2 {
  margin-top: 2rem;
}

article p {
  margin-bottom: 1rem;
}

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

article li {
  margin-bottom: 0.5rem;
}

article code {
  background: var(--card-bg);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-size: 0.875rem;
}

article pre {
  background: #1f2937;
  color: #f9fafb;
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 1rem;
}

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

.breadcrumb {
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
}

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

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