index.css

/**
 * Globals
 */
html,
body {
  cursor: default;
  margin: 0;
  height: 100%;
}

body {
  background-color: rgb(245, 245, 245);
  
  font-family: 'Roboto', 'Droid Sans', arial, sans-serif;
  font-size: 15px;
  direction: ltr;

  -webkit-user-select: none;
}

body.blur browser-topbar {
  background-color: #E9E9E9;
}

body.blur browser-topbar::shadow .button > svg > * {
  fill: rgba(0,0,0,.3);
}

body.blur browser-topbar::shadow .button.close:hover > svg > * {
  fill: #fff;
}

body.fullscreen browser-topbar,
body.fullscreen browser-header,
body.fullscreen browser-content::shadow nav {
  display: none;
}

body.fullscreen browser-content::shadow iron-pages div.iron-selected #view {
  position: fixed;
  height: 100%;
  width: 100%;
}