style.css

canvus {
  position: fixed;
  top: 0;
  left: 0;
}

main {
  position: absolute;
  width: 100vw;
  color: white;
  z-index: 99;
  position: absolute;
  width: 100%;
  margin: 0px auto;
  padding: 120px 0px;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
}

h1, h2, h3, blockquote {
  font-family: elevon, sans-serif;
  font-weight: 700;
  font-style: normal;
}

canvas {
  position: fixed;
  top: 0;
  left: 0;
}

header {
  background: var(--dark-bg);
  grid-column: 2 / span 5;
  font-size: 2.5rem;
  padding: 2rem;
  margin-bottom: var(--spacing);
}

section {
  grid-column: 2 / 8;
  padding: 1rem;
  background: var(--dark-bg);
  font-size: 1.25rem;
  line-height: 1.5;
  margin-bottom: var(--spacing);
}

blockquote {
  margin: 0;
  padding: 0;
  grid-column: 2 / span 9;
  margin-bottom: var(--spacing);
}

blockquote p {
  color: black;
  font-size: 4rem;
  display: inline;
  line-height: 1;
}

.left {
  grid-column: 6 / 12;
}

#forkongithub a {
  background: #fff;
  color: #000;
  text-decoration: none;
  font-family: arial, sans-serif;
  text-align: center;
  font-weight: bold;
  padding: 5px 40px;
  font-size: 1rem;
  line-height: 2rem;
  position: relative;
  transition: 0.5s;
}

#forkongithub a:hover {
  background: #c11;
  color: #fff;
}

#forkongithub a::before, #forkongithub a::after {
  content: "";
  width: 100%;
  display: block;
  position: absolute;
  top: 1px;
  left: 0;
  height: 1px;
  background: #fff;
}

#forkongithub a::after {
  bottom: 1px;
  top: auto;
}

@media screen and (min-width:800px) {
  #forkongithub {
    position: fixed;
    display: block;
    top: 0;
    right: 0;
    width: 200px;
    overflow: hidden;
    height: 200px;
    z-index: 9999;
  }
  #forkongithub a {
    width: 200px;
    position: absolute;
    top: 60px;
    right: -60px;
    transform: rotate(45deg);
    -webkit-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    -moz-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.8);
  }
}