body {
  margin: 0;
  overflow-x: hidden;
  color: white;
  font-family: arial, sans-serif;
  background-color: black;
  line-height: 1.5;
}

#header {
  height: 50vh;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-size: 1.5em;
  text-align: center;
  animation-name: fade-in;
  animation-fill-mode: both;
  animation-duration: 5s;
  animation-delay: 1s;
  z-index: -1;
}

#header::before {
  content: '';
  position: absolute;
  top:0; right:0; bottom:0; left:0;
  z-index: -1;
  animation: slide-left 2s .5s;
  background-image: url("https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/Elon_Musk%27s_Tesla_Roadster_%2840143096241%29.jpg/800px-Elon_Musk%27s_Tesla_Roadster_%2840143096241%29.jpg");
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}

#content {
  display: flex;
  flex-direction: column;
}
@media (min-width: 700px) {
  #content {
    flex-direction: row;
  }
}

#img-div {
  background-color: #111;
  text-align: center;
  padding: 2rem 1rem;
  margin: 1rem;
}

#img-div #image {
  max-width: 100%;
  min-width: 200px;
  width: 300px;
  display: block;
  margin: -5rem auto 0;
  border-radius: 50%;
  border: 5px solid #ddd;
}

#img-div #img-caption {
  padding: 1rem 0 0;
  font-size: 1.5em;
  font-weight: 100;
  font-style: italic;
}

#tribute-info {
  margin: 1rem;
  padding: 1rem 1.5rem;
  background-color: #111;
}

#tribute-info ul {
  max-width: 500px;
  margin: auto;
}

#footer {
  padding: 2rem;
  text-align: center;
}

@keyframes slide-left {
  0% {
    opacity: .2;
    transform: translateX(100%);
  }
  100% {
    opacity: 1;
    transform: none;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(2em);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}