body {
    font-family: 'Consolas', monospace;
    margin: 0;
    background-color: white;
}

header {
    text-align: center;
    padding: 2rem;
    color: white;
    background-color: navy;
}

.sub-head {
    display: flex;
    justify-content: center;
    padding: .5rem;
}

/* Navigation */
.main-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding: 1.5rem;
    gap: 1.5rem;
}

.main-nav a {
    text-decoration: none;
    color: navy;
    font-weight: bold;
}

.main-nav a:hover {
    text-decoration: underline;
    color: blue;
}

/* Main Content */

.categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 2rem;
    max-width: 1200px;
    margin: auto;
}

.card {
    background-color: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    border: 1px solid #ddd;
}

.card h2 {
    color: #004080;
}

.card a {
    display: inline-block;
    margin-top: 1rem;
    color: #004080;
    text-decoration: none;
    font-weight: bold;
}

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

/* Footer */
footer {
  text-align: center;
  padding: 1rem;
  background-color: #ddd;
  font-size: 0.9rem;
}

/* Tutorial Page */
.tutorial-page {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.tutorial-meta {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 1.5rem;
}

.tutorial-section {
  margin-bottom: 2rem;
}

.tutorial-section h3 {
  color: #004080;
}

pre {
  background-color: #f4f4f4;
  overflow-x: auto;
  border-left: 4px solid navy;
  border-radius: 8px;
  font-family: monospace;
  font-size: 16px;
}

img.screenshot {
  max-width: 100%;
  border: 1px solid #ccc;
  border-radius: 6px;
  margin-top: 1rem;
}