{
  overlay : {
    position          : 'fixed',
    top               : 0,
    left              : 0,
    right             : 0,
    bottom            : 0,
    backgroundColor   : 'rgba(255, 255, 255, 0.75)'
  },
  content : {
    position                   : 'absolute',
    top                        : '40px',
    left                       : '40px',
    right                      : '40px',
    bottom                     : '40px',
    border                     : '1px solid #ccc',
    background                 : '#fff',
    overflow                   : 'auto',
    WebkitOverflowScrolling    : 'touch',
    borderRadius               : '4px',
    outline                    : 'none',
    padding                    : '20px'

  }
}

var React = require('react');
var ReactDOM = require('react-dom');
var Modal = require('react-modal');


/*
The app element allows you to specify the portion of your app that should be hidden (via aria-hidden)
to prevent assistive technologies such as screenreaders from reading content outside of the content of
your modal.  It can be specified in the following ways:

* element
Modal.setAppElement(appElement);

* query selector - uses the first element found if you pass in a class.
Modal.setAppElement('#your-app-element');

*/
var appElement = document.getElementById('your-app-element');



const customStyles = {
  content : {
    top                   : '50%',
    left                  : '50%',
    right                 : 'auto',
    bottom                : 'auto',
    marginRight           : '-50%',
    transform             : 'translate(-50%, -50%)'
  }
};


var App = React.createClass({

  getInitialState: function() {
    return { modalIsOpen: false };
  },

  openModal: function() {
    this.setState({modalIsOpen: true});
  },

  afterOpenModal: function() {
    // references are now sync'd and can be accessed.
    this.refs.subtitle.style.color = '#f00';
  },

  closeModal: function() {
    this.setState({modalIsOpen: false});
  },

  render: function() {
    return (
      <div>
        <button onClick={this.openModal}>Open Modal</button>
        <Modal
          isOpen={this.state.modalIsOpen}
          onAfterOpen={this.afterOpenModal}
          onRequestClose={this.closeModal}
          style={customStyles}
          contentLabel="Example Modal"
        >

          <h2 ref="subtitle">Hello</h2>
          <button onClick={this.closeModal}>close</button>
          <div>I am a modal</div>
          <form>
            <input />
            <button>tab navigation</button>
            <button>stays</button>
            <button>inside</button>
            <button>the modal</button>
          </form>
        </Modal>
      </div>
    );
  }
});

ReactDOM.render(<App/>, appElement);