body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: #333; max-width: 900px; margin: 0 auto; padding: 0; background-color: #f4f6f8; }
header { background: #2c3e50; color: #ecf0f1; padding: 2rem; text-align: center; }
header h1 { margin: 0; font-size: 2.5rem; }
header p { opacity: 0.8; }
nav { background: #34495e; padding: 10px; text-align: center; }
nav a { color: #ecf0f1; text-decoration: none; margin: 0 15px; font-weight: bold; font-size: 1.1rem; }
nav a:hover { color: #3498db; }
.container { padding: 40px 20px; }
.card { background: #fff; padding: 30px; margin-bottom: 20px; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.05); }
.card h2 { color: #2980b9; border-bottom: 2px solid #eee; padding-bottom: 10px; }
code { background: #f1f1f1; padding: 2px 5px; border-radius: 3px; font-family: monospace; color: #e74c3c; }
pre { background: #2d3436; color: #dfe6e9; padding: 15px; overflow-x: auto; border-radius: 5px; }
footer { background: #2c3e50; color: #bdc3c7; text-align: center; padding: 20px; margin-top: 40px; }