html,
body {
  width: 100%;
  height: 100%;
}

body {
  margin: 0px;
  background-color: #000000;
  overflow: hidden;
  font-family: arial; 
}

button#vehicle {
  z-index: 10;
  background-color: #4CAF50; /* Green */
  border: none;
  border-radius: 5px;
  color: white;
  padding: 15px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  position: relative;
  left: 30px;
  top: 20px;
}

button#skybox {
  z-index: 20;
  background-color: rgb(218, 100, 45); /* Green */
  border: none;
  border-radius: 5px;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  position: relative;
  left: 35px;
  top: 20px;
}

#blocker {
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
}
 
#instructions {
  width: 100%;
  height: 100%;
  display: -webkit-box;
  display: -moz-box;
  display: box;
  -webkit-box-orient: horizontal;
  -moz-box-orient: horizontal;
  box-orient: horizontal;
  -webkit-box-pack: center;
  -moz-box-pack: center;
  box-pack: center;
  -webkit-box-align: center;
  -moz-box-align: center;
  box-align: center;
  color: #ffffff;
  text-align: center;
  cursor: pointer;
}