body {
  margin:0;
  font-family: Arial;
  background:black;
  color:white;
}
header {
  background:black;
  color:gold;
  padding:20px;
  text-align:center;
}
.hero {
  text-align:center;
  padding:40px;
}
.products {
  display:flex;
  justify-content:center;
}
.card {
  background:white;
  color:black;
  padding:20px;
  border-radius:10px;
  text-align:center;
}
button {
  background:gold;
  border:none;
  padding:10px;
}
.whatsapp {
  position:fixed;
  bottom:20px;
  right:20px;
  background:green;
  color:white;
  padding:15px;
}