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

    # Security headers
    add_header X-Frame-Options "DENY" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header X-XSS-Protection "0" always;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;

    # SPA routing — all paths fall back to index.html
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Cache static assets aggressively (Vite build output — hashed filenames)
    location ~* \.(js|css|woff2|png|svg|ico)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml text/javascript;
}