html {
  box-sizing: border-box; }

* {
  box-sizing: inherit; }

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0; }

.content {
  text-align: right;
  padding: 20px; }
  .content a.switch {
    padding: 10px;
    background: #ccc; }

.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  height: 100%;
  background: #aaa;
  width: 0;
  overflow: hidden;
  transition: width 1s cubic-bezier(0.25, 0.1, 0.25, 1); }
  .sidebar .menu {
    width: 100%; }
    .sidebar .menu ul {
      width: 100%;
      padding: 0;
      margin: 0;
      list-style: none; }
      .sidebar .menu ul li {
        width: 100%;
        position: relative;
        height: 50px;
        margin-top: 10px; }
        .sidebar .menu ul li .icon {
          background: #c00000;
          width: 50px;
          height: 50px;
          line-height: 40px;
          position: absolute;
          left: -50px;
          top: 0;
          z-index: 1;
          padding: 5px;
          transition: left 0.52832s cubic-bezier(0.22652, 0.58079, 0.53812, 1) 0.47168s; }
        .sidebar .menu ul li .text {
          padding: 5px 5px 5px 55px;
          background: #00c000;
          width: 220px;
          height: 50px;
          line-height: 40px;
          position: absolute;
          right: 0;
          top: 0; }
  .sidebar-open .sidebar {
    width: 220px; }
    .sidebar-open .sidebar .menu ul li .icon {
      left: 0;
      transition: left 0.1697s cubic-bezier(0.40349, 0.12051, 0.69646, 0.50507); }