body,
html {
  margin: 0;
  font: 12px Helvetica, "Helvetica Neue", Arial, sans-serif;
  height: 100vh;
  overflow: hidden;
}

header {
  margin: 0;
  padding: 0 2rem;
  line-height: 5rem;
  background: #eee;
}

header h1 {
  margin: 0;
}

main {
  width: 30rem;
  padding: 2rem;
  float: left;
  height: calc(100vh - 9rem);
  overflow-y: scroll;
  background: #eee;
}

aside {
  float: right;
  padding: 2rem;
  width: calc(100% - 38rem);
}

aside h1 {
  font-size: 2em;
}

aside h3 {
  margin: 0;
}

aside section {
  border: 1px solid black;
  margin: 1em;
  padding: 1rem;
}

aside section#portrait {
  height: 360px;
}

/* aside div {
  float: left;
  width: 50%;
} */

/* input {
  display: none;
}

input:checked + label {
  background: #cfc;
}

label p {
  display: none;
}

input:checked + label p {
  display: block;
}

label {
  display: block;
  background: #eee;
  padding: 1em;
  margin: 0.5em 0;
  border-radius: 1em;
}

label p {
  margin: 0.5em 0 0;
} */