body {
  margin: auto;
}

.up {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
button {
  padding: 10px 20px;
  background-color: #4c6ef5;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

button:hover {
  background-color: #3b5bdb;
}