body {
  background: rgb(0, 0, 0);
  color: #51ff00;
  font-family: 'Ribeye Marrow', system-ui;
  font-size: 40px;
  height: 100vh;
  margin: 0;
  overflow: hidden;
}

h1 {
  text-align: center;
}

button {
  background-color: rgb(255, 0, 162);
  color: #acff06;
  font-size: 20px;
  font-family: 'Barrio', system-ui;
  border: none;
  border-radius: 6px;

  position: absolute;
  bottom: 10%;
  left: 50%;
  transform: translateX(-50%);
  cursor: pointer;
  padding: 12px 20px;
}

#mark {
  position: fixed;
  top: 20px;
  right: 30px;
  width: 40px;
  cursor: pointer;
}

#giftbox {
  width: 10em;
  position: absolute;
  bottom: 20%;
  left: 50%;
  transform: translateX(-50%);
  cursor: pointer;
}