.toc {
  position: fixed;
  left: 10vw;
  top: 10vw;
  max-width: 15%;
  font-size: 0.8rem;
}

@media (min-width: 320px) {
  body {
    width: 90%;
    margin: 0;
    padding: 0 5%;
  }

  header {
    margin: 4.2rem 0;
  }

  nav {
    margin: 0 auto 3rem;
    text-align: center;
  }

  footer {
    text-align: center;
  }

  .logo {
    text-align: center;
    margin: 1rem auto 3rem;
  }

  .logo a {
    font-size: 2.4rem;
  }

  nav a {
    display: block;
    line-height: 1.6;
  }

  .toc {
    display: none;
  }

  .footnotes {
    display: none;
  }

  .sidenote-wrapper {
    display: inline;
  }

  .sidenote {
    display: none;
    font-size: 0.9rem;
    line-height: 1.3;
    vertical-align: baseline;
    position: relative;
    text-align: left;
  }

  .margin-toggle {
    display: inline;
    cursor: pointer;
  }

  .margin-toggle.sidenote-number {
    font-size: 1rem;
  }

  label.margin-toggle.sidenote-number {
    vertical-align: baseline;
    position: relative;
    top: -0.5rem;
  }

  .margin-toggle:checked+.sidenote {
    display: block;
    max-width: 80%;
    margin: 1rem 0;
    padding: 0.5rem;
    background: #fffff8;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-left: 3px solid #999;
  }

  .sidenote:hover,
  .sidenote:focus {
    color: #111;
  }

  .sidenote-number {
    counter-increment: sidenote-counter;
    text-decoration: none;
    color: inherit;
  }

  .sidenote-number::after {
    content: counter(sidenote-counter);
    font-size: 0.7rem;
    top: -0.1rem;
    left: 0.1rem;
    position: relative;
    vertical-align: baseline;
    color: #666;
  }

  .sidenote-number:hover {
    color: #666;
    cursor: pointer;
  }

  .marginnote {
    display: none;
    font-size: 0.9rem;
    line-height: 1.3;
    vertical-align: baseline;
    position: relative;
    text-align: left;
  }

  .margin-toggle:checked+.marginnote {
    display: block;
    max-width: 80%;
    margin: 1rem 0;
    padding: 0.5rem;
    background: #fffff8;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-left: 3px solid #999;
  }
}

@media (min-width: 640px) {
  body {
    counter-reset: sidenote-counter;
    width: 45vw;
    margin: 0 auto;
    padding: 0;
    position: relative;
  }

  header {
    margin: 0 0 3rem;
    padding: 1.2rem 0;
  }

  nav {
    margin: 0;
    text-align: right;
  }

  nav a {
    margin: 0 0 0 1.2rem;
    display: inline;
  }

  footer {
    text-align: right;
  }

  .logo {
    margin: 0;
    text-align: left;
  }

  .logo a {
    float: left;
    font-size: 1.8rem;
  }

  .toc {
    display: block;
  }

  .footnotes {
    display: block;
  }

  .sidenote {
    display: block;
    float: right;
    clear: right;
    margin-right: -60%;
    width: 50%;
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    line-height: 1.3;
    position: relative;
    color: #666;
  }

  .sidenote-number::after {
    content: counter(sidenote-counter);
    font-size: 0.7rem;
    top: -0.1rem;
    left: 0.1rem;
    position: relative;
    vertical-align: baseline;
  }

  .sidenote-wrapper {
    display: inline;
  }

  .sidenote-number {
    display: inline-block;
    text-decoration: none;
    color: inherit;
  }

  .sidenote-number:hover {
    color: #666;
    cursor: pointer;
  }

  .sidenote:hover,
  .sidenote:focus {
    color: #111;
  }

  .marginnote {
    display: block;
    float: right;
    clear: right;
    margin-right: -60%;
    width: 50%;
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    line-height: 1.3;
    position: relative;
    color: #666;
  }

  .marginnote:hover,
  .marginnote:focus {
    color: #111;
  }

  .margin-toggle {
    display: none;
  }

  label.margin-toggle {
    display: none;
  }

  label.margin-toggle.sidenote-number {
    display: inline;
    position: relative;
    font-size: 1rem;
  }

  .margin-toggle:checked+.sidenote {
    display: block;
  }
}