/* Welcome ------------------------ */

.about {
  --about-space: 4rem;

  position: absolute;
  display: flex;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 0;
  background-color: hsl(0,0%,98%);
  pointer-events: none;
  visibility: hidden;
  opacity: 0;
  transform: scale(1.1);
  transition: visibility 0s .12s linear , opacity .12s ease-in, transform .12s ease-in;
}
.about.is-shown {
  pointer-events: auto;
  visibility: visible;
  opacity: 1;
  transform: scale(1);
  transition: visibility 0s 0s linear , opacity .24s ease-out, transform .24s ease-out;
}

.about-wrapper {
  margin: auto;
}

.about-header {
  padding: var(--about-space) 0;
  border-bottom: 1px solid hsl(0,0%,88%);
}

.about-logo {
  display: block;
  margin: 0 auto;
  width: 320px; /* TODO: Adjust asset to this size */
  max-width: 100%;
}

.about-sections {
  max-width: 680px;
  padding: 0 var(--about-space);
}

.about-section {
  margin: var(--about-space) 0;
}

.about h2 {
  text-align: center;
  margin: 0 0 1em 0;
  font-size: 1.5em;
  color: hsl(0, 0%, 55%);
}

.about .about-code h2 {
  color: hsl(330, 65%, 55%);
}

.about .play-along h2 {
  color: hsl(222, 53%, 50%);
}

.about-button {
  display: block;
  margin: 0 auto;
  padding: .4em 1.2em;
  font: inherit;
  font-size: 1.6em;
  color: inherit;
  border: 2px solid;
  border-radius: 4px;
  background-color: transparent;
}
.about-button:focus {
  outline: none;
  border-color: hsl(0,0%,88%);
}

footer.about-section {
  text-align: center;
}

.rainbow-button-wrapper {
  --rainbow-button-width: 170px;
  --rainbow-button-height: 50px;
  --rainbow-button-width-inner: 164px;
  --rainbow-button-height-inner: 44px;
  --rainbow-color-1: hsl(116, 30%, 36%);
  --rainbow-color-2: hsl(194, 60%, 36%);
  --rainbow-color-3: hsl(222, 53%, 50%);
  --rainbow-color-4: hsl(285, 47%, 46%);
  --rainbow-color-5: hsl(330, 65%, 48%);
  --rainbow-color-6: hsl(32, 79%, 49%);
  --rainbow-color-7: hsl(53, 84%, 50%);

  display: inline-block;
  width: var(--rainbow-button-width);
  height: var(--rainbow-button-height);
  position: relative;
  overflow: hidden;
  border-radius: 5px;
}

.rainbow-button-wrapper:before {
  display: block;
  position: absolute;
  z-index: 2;
  top: 0;
  left: 0;
  width: 600px;
  height: var(--rainbow-button-height);
  background: #CCC;
  background: linear-gradient(to right, var(--rainbow-color-1) 0%, var(--rainbow-color-2) 14%, var(--rainbow-color-3) 28%, var(--rainbow-color-4) 42%, var(--rainbow-color-5) 56%, var(--rainbow-color-6) 70%, var(--rainbow-color-7) 84%, var(--rainbow-color-1) 100%);
  background-position: -200px 0;
  transition: all 0.5s;
  content: "";
}

.rainbow-button-wrapper button {
  display: block;
  width: var(--rainbow-button-width-inner);
  height: var(--rainbow-button-height-inner);
  position: absolute;
  z-index: 3;
  top: 3px;
  left: 3px;
  border: none;
  background: white;
  color: black;
  font-size: 1.3rem;
}

.rainbow-button-wrapper:hover:before {
  background-position: 200px 0;
}

@media (min-width: 940px) {
  .about-header {
    align-self: center;
    padding: var(--about-space);
    border-right: 1px solid hsl(0,0%,88%);
    border-bottom: none;
  }
  .about-wrapper {
    display: flex;
  }
}