body,
html {
  margin: 0px;
  padding: 0px;
  position: fixed;
  background: black;
}


.buymeacoffee {
  text-decoration: none;
  position: fixed;
  right: 2rem;
  bottom: 2rem;
  background: #FFDD00;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  transition: all 0.1s linear;
  box-shadow: 0.2rem 0.2rem 0.5rem rgba(0, 0, 0, 0.2);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.buymeacoffee:hover {
  width: 4rem;
  height: 4rem;
  line-height: 4rem;
}