CSS @media queries not working?

Question

css

I’m writing a site on React Js, I started making an adaptive menu, initially the width changed at a width of 600px and then abruptly stopped, now no matter what I write, media at the end of the entire page, "meta viewport ...." and so on is also in index.html , below code:

Menu.js:
import React from 'react';
import './ComponentsStyles/MenuStyles.css';
import { BrowserRouter as Router, Route, Switch, Link } from 'react-router-dom';

export default class Menu extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      
    }
  }	

  render() {
    return (
      <>
       	<header className="menu">
        		<div className="menu__logo">
        			<a href="/" className="logo">TRVL <i className="fab fa-typo3"></i></a>
        		</div>
        		<div className="menu__links">
        			<ul>
        				<li><a href="/">Home</a></li>
        				<li><a href="/services">Services</a></li>
        				<li><a href="/products">Products</a></li>
        				<div id="sign"><a href="/sign-up">SIGN UP</a></div>
        			</ul>
        			<i class="fa fa-bars" id="bars"></i>
        		</div>
        	</header>
      </>
    );
  }
}

MenuStyles.css:

@import url('https://fonts.googleapis.com/css2?family=Roboto:[email protected]&display=swap');

a, i {
  color: #fff;
  text-decoration: none;
  cursor: pointer;
}

.menu {
  width: 1325px;
  height: 90px;
  box-sizing: border-box;
  font-family: 'Roboto', sans-serif;
  background-color: rgb(45, 33, 33);
}

.logo {
  margin-top: 25px;
  margin-left: 100px;

  font-weight: bold;
  font-size: 35px;
  display: inline-block;
}

.menu__links {
  height: inherit;

  float: right;
  margin-top: -60px;
}

.menu__links ul li {
  display: inline-block;
  margin-right: 80px;
  font-size: 20px;
}

#sign {
  width: 150px;
  height: 50px;
  border: 2px solid #fff;
  
  box-sizing: border-box;
  margin-top: -20px;
  margin-right: 50px;
  padding-top: 8px;

  justify-content: center;
  align-items: center;
  text-align: center;
  
  display: inline-block;
}

#bars {
  display: none;
}

@media screen and (max-width: 600px) {
  .menu__links ul li {
    display: none;
  }
  #sign {
    display: none;
  }
  .menu {
    width: 600px;
    height: 50px;
  }
  #bars {
    display: block;
  }
}