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

:root {
  --primary-color: #2563eb;
  --secondary-color: #1e40af;
  --text-color: #1f2937;
  --text-light: #6b7280;
  --bg-color: #ffffff;
  --bg-secondary: #f9fafb;
  --border-color: #e5e7eb;
  --code-bg: #f3f4f6;
  --success-color: #10b981;
}

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

/* Navbar */
.navbar {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  padding: 1rem 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
}

.nav-icon {
  font-size: 2rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.2s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links a:hover {
  opacity: 0.8;
}

.nav-links a.active {
  border-bottom: 2px solid white;
}

.github-link {
  background: rgba(255,255,255,0.2);
  padding: 0.5rem 1rem;
  border-radius: 6px;
}

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

/* Main Content */
main {
  padding: 3rem 0;
  min-height: calc(100vh - 200px);
}

.content {
  background: white;
  padding: 3rem;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Typography */
h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-color);
  border-bottom: 3px solid var(--primary-color);
  padding-bottom: 0.5rem;
}

h2 {
  font-size: 2rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--text-color);
}

h4 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-color);
}

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

a:hover {
  text-decoration: underline;
}

/* Code Blocks */
code {
  background: var(--code-bg);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.9em;
  color: #e83e8c;
}

pre {
  background: var(--code-bg);
  padding: 1.5rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.5rem 0;
  border-left: 4px solid var(--primary-color);
}

pre code {
  background: none;
  padding: 0;
  color: var(--text-color);
}

/* Lists */
ul, ol {
  margin: 1rem 0 1rem 2rem;
}

li {
  margin-bottom: 0.5rem;
}

/* Badges and Labels */
img[alt*="badge"] {
  display: inline-block;
  margin: 0.25rem;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
}

th, td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: var(--bg-secondary);
  font-weight: 600;
}

/* Blockquotes */
blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: 1rem;
  margin: 1.5rem 0;
  color: var(--text-light);
  font-style: italic;
}

/* HR */
hr {
  border: none;
  border-top: 2px solid var(--border-color);
  margin: 2rem 0;
}

/* Footer */
footer {
  background: var(--bg-secondary);
  padding: 2rem 0;
  text-align: center;
  color: var(--text-light);
  border-top: 1px solid var(--border-color);
}

footer p {
  margin: 0.5rem 0;
}

footer a {
  color: var(--primary-color);
  margin: 0 0.5rem;
}

/* Checkboxes */
input[type="checkbox"] {
  margin-right: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }

  .content {
    padding: 1.5rem;
  }

  .nav-links {
    gap: 1rem;
  }

  .nav-links a {
    font-size: 0.9rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  pre {
    padding: 1rem;
  }
}

/* Anchor links */
.header-anchor {
  opacity: 0;
  transition: opacity 0.2s;
  margin-left: -1.5rem;
  padding-right: 0.5rem;
  color: var(--primary-color);
}

h2:hover .header-anchor,
h3:hover .header-anchor,
h4:hover .header-anchor {
  opacity: 1;
}

/* Badge styles */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--primary-color);
  color: white;
  border-radius: 12px;
  font-size: 0.875rem;
  font-weight: 500;
}