* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: "Roboto", sans-serif;
  background-color: #2196f3;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100vh;
  position: relative;
}
.btn {
  border: none;
  cursor: pointer;
  font-size: 35px;
  padding: 10px;
  border-radius: 6px;
  transition: 0.4s;
  border-bottom: 10px solid gray;
  display: block;
  width: fit-content;
  margin-top: 30px;
}

.btn:disabled {
  cursor: default;
  filter: brightness(35%);
  border-bottom: 0px solid gray;
}
img {
  position: absolute;
  z-index: -1;
  top: 50%;
  left: 50%;
  transform: translate(-24%, -51%);
}
@media (max-width: 500px) {
  img {
    width: 250px;
    transform: translate(-70%, -105%);
  }
  .btn {
    font-size: 25px;
    margin-top: 30px;
  }
}