server {
    listen 80;
    server_name _;

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

    location /api/ {
        proxy_pass http://backend:8001/api/;
        proxy_http_version 1.1;
        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;
    }

    location /health {
        proxy_pass http://backend:8001/health;
        proxy_http_version 1.1;
        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;
    }

    # Known SPA routes — serve index.html
    location = / {
        try_files /index.html =404;
    }

    location ~ ^/(write|history|settings|privacy|about)(/|$) {
        try_files /index.html =404;
    }

    # Static assets — serve directly, 404 if missing
    location / {
        try_files $uri $uri/ =404;
    }
}