style.css

html {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: #45badd;
  
}
.container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  width: 100vw;
  background-size: contain;
  background-image: url(robot.gif);
  background-repeat: no-repeat;
  background-position: left center;
}
button {
  border: none;
  outline: none;
  border-radius: 7px;
  width: 15rem;
  height: 4rem;
  background: #ff3482;
  font-family: 'Courier New', Courier, monospace;
  font-size: 1.2rem;
  color: white;
  box-shadow: 2px 2px 20px 10px rgba(0,0,0,0.2);
  cursor: pointer;
}
button:hover{
  filter:brightness(90%);
}
button:active{
  transform: scale(95%);
}
button:disabled{
  cursor: default;
  filter: brightness(30%);
}
/* Media query */
@media screen and (max-width: 1000px) {
  .container {
    background-size: cover;
    background-position: center center;
  }
  button {
    box-shadow: 5px 5px 30px 20px rgba(0,0,0,0.5);
  }
}