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

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml+rss application/json application/javascript;

    # Security headers
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-Frame-Options "DENY" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;

    # Cache control for static assets
    location ~* ^/_astro/ {
        add_header Cache-Control "public, max-age=31536000, immutable" always;
        try_files $uri =404;
    }

    location ~* ^/assets/ {
        add_header Cache-Control "public, max-age=31536000, immutable" always;
        try_files $uri =404;
    }

    location ~* ^/favicon/ {
        add_header Cache-Control "public, max-age=31536000, immutable" always;
        try_files $uri =404;
    }

    location ~* ^/pio/ {
        add_header Cache-Control "public, max-age=31536000, immutable" always;
        try_files $uri =404;
    }

    # CORS headers for RSS/Atom feeds
    location ~* ^/(atom|rss)\.xml$ {
        add_header Access-Control-Allow-Origin "*" always;
        add_header Access-Control-Allow-Methods "GET" always;
        add_header Access-Control-Max-Age "86400" always;
        try_files $uri =404;
    }

    # Main location - SPA fallback
    location / {
        try_files $uri $uri/ $uri.html /index.html;
    }

    # Error pages
    error_page 404 /404.html;
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }
}