* {
  padding: 0;
  margin: 0; }

body, html {
  text-rendering: optimizeLegibility;
  text-rendering: geometricPrecision;
  font-smoothing: antialiased;
  -moz-font-smoothing: antialiased;
  -webkit-font-smoothing: antialiased;
  -webkit-font-smoothing: subpixel-antialiased; }

li {
  list-style-type: none; }

.cover {
  position: fixed;
  left: 0;
  bottom: 0;
  right: 0;
  top: 0; }

.align-helper {
  vertical-align: middle;
  display: inline-block;
  height: 100%; }

.not-displayed {
  opacity: 0;
  visibility: hidden; }

.displayed {
  opacity: 1;
  visibility: visible;
  -webkit-transition: opacity 0.5s;
  -moz-transition: opacity 0.5s;
  -ms-transition: opacity 0.5s;
  -o-transition: opacity 0.5s;
  transition: opacity 0.5s; }

.clear {
  clear: both; }