html,
body {
  margin: 0;
  background: #fff;
  color: #fff;
  font-family: "JetBrains Mono", Helvetica Neue, Helvetica, Arial, sans-serif;
}
a:link {
  color: #242429;
}
a:visited {
  color: #242429;
}
a:hover {
  color: #242429;
}
a:active {
  color: #242429;
}
sub {
  padding-top: 0;
}
main {
  position: relative;
  height: 100vh;
  padding-left: 220px;
}
main .canvas {
  height: 100%;
  width: 100%;
}
.menu {
  background: #787b8b;
  height: 100vh;
  width: 220px;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 5;
  outline: none;
}
.menu header {
  background: rgba(0, 0, 0, 0.2);
  padding: 0.5em 0.5em;
  text-align: center;
}
.menu header h2 {
  font-weight: normal;
  margin-top: 0.25em;
  margin-bottom: 0.25em;
}
.menu ul {
  list-style: none;
  padding: 0.5em 0;
  margin: 0;
}
.menu ul li {
  padding: 0.5em 1em 0.5em 3em;
  font-size: 0.95em;
  font-weight: regular;
  background-repeat: no-repeat;
  background-position: left 15px center;
  background-size: auto 20px;
  transition: all 0.15s linear;
  cursor: pointer;
}
.menu ul li:hover {
  background-color: rgba(0, 0, 0, 0.2);
}
.menu ul li:focus {
  outline: none;
}
@media screen and (max-width: 400px) {
  main {
    padding-left: 0;
  }
  .menu {
    width: 230px;
    box-shadow: 0 0 0 100em rgba(0, 0, 0, 0);
    transform: translate3d(-230px, 0, 0);
    transition: all 0.3s ease-in-out;
  }
  .menu .smartphone-menu-trigger {
    width: 40px;
    height: 40px;
    position: absolute;
    left: 100%;
    background: #787b8b;
  }
  .menu .smartphone-menu-trigger:before,
  .menu .smartphone-menu-trigger:after {
    content: '';
    width: 50%;
    height: 2px;
    background: #fff;
    border-radius: 10px;
    position: absolute;
    top: 45%;
    left: 50%;
    transform: translate3d(-50%, -50%, 0);
  }
  .menu .smartphone-menu-trigger:after {
    top: 55%;
    transform: translate3d(-50%, -50%, 0);
  }
  .menu ul li {
    padding: 1em 1em 1em 3em;
    font-size: 1.2em;
  }
  .menu:focus {
    transform: translate3d(0, 0, 0);
    box-shadow: 0 0 0 100em rgba(0, 0, 0, 0.6);
  }
  .menu:focus .smartphone-menu-trigger {
    pointer-events: none;
  }
}