html {
  background: #fdfdfd;
}

.app {
  width: 1000px;
  margin: 25px auto 0;
}

.container {
  display: grid;
  grid-template: auto 1fr auto / auto 1fr auto;
}

.main {
  width: 800px;
  grid-column: 1 / 2;
}

.sidebar {
  width: 200px;
  padding: 0 0 0 10px;
  grid-column: 2 / 3;
}

.assets {
  margin: 0 0 15px;
}

.assets img {
  vertical-align: middle;
}

.toolbar {
  width: 100%;
}

.toolbar li {
  padding: 5px 10px;
}

footer {
  width: 100%;
  margin: 15px 0 30px;
}