server {
    listen 80;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;

    # Gzip
    gzip on;
    gzip_types text/html text/css application/javascript application/json image/svg+xml;
    gzip_min_length 256;
    gzip_proxied any;
    gzip_vary on;

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;

    # API proxy to backend
    location /api/ {
        proxy_pass http://app:8080/api/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_connect_timeout 10s;
        proxy_read_timeout 30s;
    }

    # Static assets (cache)
    location /_nuxt/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # SPA fallback: try static file, then 404
    location / {
        try_files $uri $uri/index.html $uri.html =404;
    }

    # Error pages
    error_page 404 /404.html;
    error_page 500 502 503 504 /200.html;
}