body { font-family: Arial, sans-serif; margin: 0; padding: 0; background: #f5f5f5; color: #333; }
header { background: #111; padding: 10px 20px; }
header nav { display: flex; gap: 15px; }
header nav a { color: #eee; text-decoration: none; font-weight: bold; }
header nav a:hover { text-decoration: underline; }
footer a { text-decoration: none; }
.btn { display:inline-block; padding: 12px 24px; background:#007bff; color:#fff; border-radius:4px; text-decoration:none; margin: 10px; }
.btn-secondary { display:inline-block; padding: 12px 24px; background:#444; color:#fff; border-radius:4px; text-decoration:none; margin: 10px; }
.feature-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap:20px; }
.feature h3 { margin-top:0; }