style.css

body {
  background-color: #fff;
  text-align: center;
  color: #fff;
  font-family: 'Roboto', sans-serif;
}

input[type='text'] {
  font-size: 24px;
}

#p5canvas {
  background-color: #2dc5f4;
  width: 850px;
  height: 1024px;
  margin: auto;
  margin-top: 250px;
}

#topper {
  width: 850px;
  margin-top: -220px;
  left: 50%;
}

#thanks {
  font-size: 1.7em;
  font-weight: bold;
  white-space: pre-line;
}

#interface {
  margin-bottom: 10px;
}

#walk {
  font-size: 1.25em;
  margin-top: -20px;
  margin-bottom: 10px;
}

#go {
  background-color: #70327e; /* Green */
  border: none;
  color: white;
  padding: 8px 16px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 32px;
  font-family: 'Roboto', sans-serif;
}

#number {
  background-color: white; /* Green */
  border: none;
  color: rgb(0, 0, 0);
  padding: 8px 16px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 32px;
  font-family: 'Roboto', sans-serif;
  margin-right: 16px;
}

#number::placeholder {
  color: rgb(170, 170, 170);
}

.github-corner:hover .octo-arm {
  z-index: 2;
  animation: octocat-wave 560ms ease-in-out;
}

@keyframes octocat-wave {
  0%,
  100% {
    transform: rotate(0);
  }

  20%,
  60% {
    transform: rotate(-25deg);
  }

  40%,
  80% {
    transform: rotate(10deg);
  }
}

@media (max-width: 500px) {
  .github-corner:hover .octo-arm {
    animation: none;
  }

  .github-corner .octo-arm {
    animation: octocat-wave 560ms ease-in-out;
  }
}