server {
    listen 80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml text/javascript
               application/json application/javascript application/xml;

    # VitePress SPA routing
    location / {
        try_files $uri $uri.html $uri/ /index.html;
    }

    # Static assets caching
    location ~* \.(jpg|jpeg|png|gif|ico|css|js|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Health check endpoint
    location /health {
        return 200 'OK';
        add_header Content-Type text/plain;
    }

    error_page 404 /404.html;
}