Nginx subdirectory css and js not wokring Laravel

Am trying to setup multiple laravel projects on nginx server. now in /var/www/htm/ i have two projects demo and demo1

nginx default conf

server {
    listen 80 default_server;
    listen [::]:80 default_server;

    root /var/www/html;

    # Add index.php to the list if you are using PHP
    index index.php index.html index.htm index.nginx-debian.html;

    server_name _;

    location / {
        # First attempt to serve request as file, then
        # as directory, then fall back to displaying a 404.
        try_files $uri $uri/ =404;
    }
    location /demo {

        alias /var/www/html/demo/public;

        try_files $uri $uri/ @nested;

               location ~ \.php$ {
                        include fastcgi_params;
                        fastcgi_param SCRIPT_FILENAME $request_filename;
                        fastcgi_pass   unix:/run/php/php7.4-fpm.sock;

                        }
   }

location @nested {
        rewrite /demo/(.*)$ /demo/index.php?/$1 last;
}

    # pass PHP scripts to FastCGI server
    #
    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
    #
    #   # With php-fpm (or other unix sockets):
        fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
    #   # With php-cgi (or other tcp sockets):
    #   fastcgi_pass 127.0.0.1:9000;
    }
}

Now here when am trying to access myip/demo then there is no css. i.e <link rel=“stylesheet” href=“/css/demo.css”> this means nginx trying to find css and js files in root directory but files are available in demo directory. how can I solve this? thank you