div {
  box-shadow: 2px 2px 5px gray;
}

div {
  box-shadow: 4px 4px 10px rgba(0,0,0,0.3);
}

div {
  box-shadow: inset 2px 2px 5px gray;
}

div {
  box-shadow: 2px 2px 5px black, -2px -2px 5px gray;
}

h1 {
  text-shadow: 2px 2px 5px gray;
}

div {
  box-shadow: 8px 8px 15px #ccc, -8px -8px 15px #fff;
}