* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  overflow: hidden;
  background: #3498db;
  background: linear-gradient(to top, #ffffff, #2c3e50);
/*   background-attachment: fixed; */
}

.title {
  font: 50px Arial;
  letter-spacing: 0.2em;
  color: #ffffff;
  text-align: center;
  line-height: 20vh;
  margin-top: 10vh;
}

.launch {
  font: 30px Arial;
  letter-spacing: 0.1em;
  color: #ffcd1e;
  background: #ffffff;
  display: block;
  width: 20vw;
  min-width: 80px;
  margin: 3vh auto;
  padding: 5px 10px;
  text-align: center;
  border-radius: 2px;
  cursor: pointer;
  transition: background 1s ease, color 1s ease;
}
.launch:hover {
  background: #ffcd1e;
  color: #ffffff;
}

.rocket {
  width: 200px;
  position: absolute;
  bottom: -20px;
  left: calc(50% - 100px);
  filter: brightness(80%);
  z-index: 100;
/*   animation: fire 20s infinite; */
}

footer {
  text-align: center;
  font: 16px Arial;
  color: #f5f5f5;
  position: absolute;
  width: 100%;
  bottom: 20px;
/*   z-index: -1; */
  transition: opacity 2s ease;
  opacity: 0;
}
footer a {
  color: #333;
  text-decoration: none;
}
footer a:hover {
  color: #f5f5f5;
  text-decoration: underline;
}

@keyframes fire {
  100% {
    bottom: 110vh;
    width: 40px;
    left: calc(50% - 20px);
  }
}