Eu tenho procurado, no entanto, tive pouca sorte em encontrar alguma maneira de estilizar o arquivo React.js que criei, converti-o de uma página da Web padrão, por isso tenho o CSS original, no entanto, não sei como para usar React para exibir a página com o estilo adequado.

Qualquer ajuda seria apreciada!

var NavBar = React.createClass({
  render: function() {
    return (
      /* NavBar */
      <div className="dark_bg_color">
        <img src="logo.png" />
        <div className="table_center">
          <div>
            <ul>
              <li>daily specials</li>
              <li>gift gallery</li>
              <li>events</li>
              <li><i className="fa fa-search" />&nbsp;search</li>
            </ul>
          </div>
        </div>
        <div className="right_nav">
          <div className="table_center">
            <div>
              <button type="button">Sign Up</button>
              <button type="button">Log In</button>
              <div className="vertical-line">&nbsp;</div>
              <button type="button">Cart</button>
            </div>
          </div>
        </div>
      </div>
    );
  }
});
ReactDOM.render(<NavBar />, document.getElementById('nav'));

var Gallery = React.createClass({
  render: function() {
    return (
      /* Gallery */
      <div >
        <div align="middle">
          <div id="head">
            <img id="pic" align="middle" max-width="100%" src="title_pic.png" />
            <div align="left" className="big">
              <div>
                <span>Dine with the Best</span>
                <div className="words">
                  <span>BonApp connects you with limited-time, exclusive meals and events offered by the city’s best chefs.<br /><br /><br /><button type="button">JOIN BONAPP</button></span>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
    );
  }
});
ReactDOM.render(<Gallery />, document.getElementById("Gallery"));

var WhatsNew = React.createClass({
  render: function() {
    return (
      <div  className="dark_bg_color">
        <h2 style={{marginBottom: 30}}>
          <span>What's New</span>
        </h2>
        <div className="autoplay">
          <img src="whatsnew0.png" />
          <img src="whatsnew1.png" />
          <img src="whatsnew0.png" />
        </div>
      </div>
    );
  }
});
ReactDOM.render(<WhatsNew />, document.getElementById("whatsnew"));

var BonEvents = React.createClass({
  render: function() {
    return (
      /* Events */
      <div id="events" className="dark_bg_color">
        <div className="box">
          <div className="box-text">
            <div className="horizontal-line" />
            <div><div className="horizontal-line" /><p>LES BON CADEAUX</p></div>
            <div className="horizontal-line" />
          </div>
        </div>
        <h2>
          <span>Bon Events</span>
        </h2>
        <div>
        </div>
      </div>
    );
  }
});
ReactDOM.render(<BonEvents />, document.getElementById("events"));

var IOS = React.createClass({
  render: function() {
    /* IOS */
    return (
      <div >
        <h2>
          <span />
        </h2>
      </div>
    );
  }
});
ReactDOM.render(<IOS />, document.getElementById("advertiseApp"));

var Footer = React.createClass({
  render: function() {
    return (
      /* Footer */
      <div>
        <div className="footer_center">
          <div>
            <ul>
              <li>ABOUT</li>
              <li>PRESS</li>
              <li>CONTACT</li>
              <li>SUPPORT</li>
              <li>BONAPP FOR RESTAURANTEURS</li>
            </ul>
          </div>
        </div>
        <div className="legal_center">
          <div>
            <ul>
              <li>Copyright © 2016 BonApp Dining Inc.</li>
              <li>Privacy Policy</li>
              <li>Legal</li>
            </ul>
          </div>
        </div>
      </div>
    );
  }
});
ReactDOM.render(<Footer />, document.getElementById("footer"));