* {
  text-align: center;
  box-sizing: border-box;
  margin: 0;
}

body {
  color: #fff;
  background-color: #121212;
}

.link {
  max-width: 5vh;
  filter: saturate(0);
  margin: 0 7px;
}
.footer {
  display: flex;
  justify-content: center;
  align-items: center;
}

.link.g {
  width: 4vh !important;
}

.link:hover {
  filter: saturate(100);
}

canvas {
  border: 3px solid #000;
}

h2 {
  margin: 20px;
}

button {
  margin: 10px;
  padding: 10px;
  cursor: pointer;
  background-color: #dc143c;
  color: #fff;
  border-radius: 5px;
  border: none;
}

button:active {
  background-color: #72061b;
}

button:hover {
  border: #000 1px solid;
}

@media screen and (max-width: 400px) {
  canvas {
    width: 300px;
    height: 300px;
  }
}