body,html{
  height: 100%;
  margin: 0;
}


.bg{
  background-image: url("manutenca.jpg");
  background-repeat: no-repeat;
  background-position: center;
  height: 100%;
  background-size: cover;
}

.btn1{
  font-family: arial;
  font-size:20px;
  font-weight:700;
  text-transform: uppercase;
  border:none;
  padding:10px;
  cursor: pointer;
  display:inline-block;
  text-decoration: none;
  position: absolute;
  bottom: 0%;
  left: 0%;
  opacity: 00%;
  height: 30%;
  width: 90%;

}

.btn{
  display:inline-block;
  text-decoration: none;
  position: absolute;
  padding:10px;
  bottom: 20%;
  left: 12%;
  width: 220px;

}