index.css

header.navbar {
  height: 40px;
  margin: 5px 20px;
}

div.menu .menu-item.tile.tile-centered {
  margin-top: 5px;
}

.menu.hero-list {
  z-index: inherit;
  transform: none;
  min-height: 500px;
}

footer {
  position: fixed;
  bottom: 0;
  font-size: 14px;
}

index.js

import React from 'react';
import ReactDOM from 'react-dom';

import 'spectre.css';
import './index.css';

import App from './App';

ReactDOM.render(<App />, document.getElementById('root'));