body {
  margin: 0;
  height: 100%;

}


img {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover; 
  z-index: -1;
}


.button {
  position: fixed;
  bottom: 40px;     
  left: 50%; 
  
}


.btn {
  padding: 18px 50px;
  font-size: 22px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(45deg, #ff3c00, #ff7b00);
  color: white;
  cursor: pointer;
}