body {
  margin: 0;
  padding: 0;
  font-family: Arial;
  min-height: 100vh;
}

.container {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  animation: animate 30s ease-in-out infinite;
}

.shadow {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
}

.content {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.content img {
  width: 40%;
  height: 40%;
}

.content h2 {
  color: grey;
}

.content h2 span:nth-child(1) {
  color: orange;
  font-size: 2em;
}

.content h2 span:nth-child(2) {
  color: #fff;
}

.content a {
  color: chartreuse;
}

.bottom {
  top: 100%;
  position: sticky;
  text-align: center;
  font-size: 1em;
  background: rgba(0, 0, 0, 0.5);
  color: white;
}

.bottom p {
  display: inline-flex;
}

.bottom-ul {
  display: inline-flex;
}

.bottom-ul li {
  display: inline-block;
  padding-left: 0.5em;
  padding-right: 0.5em;
  border-right: 1px solid #fff;
}

.bottom ul li:nth-child(7) {
  border-right: none;
}

.bottom ul li a {
  text-decoration: none;
  color: orange;
}

.bottom ul li a:hover {
  text-decoration: underline;
  color: white;
}

.bottom ul li .selected {
  color: #fff;
  font-style: oblique;
}

.instruction {
  height: 40em;
  width: 50em;
  overflow: auto;
  background: rgba(255, 255, 255, 0.75);
  color: #000;
  scrollbar-base-color: gold;
  padding: 10px;
  text-align: justify;
}

.instruction a {
  color: rgb(221, 144, 2);
}


@keyframes animate {

  0%,
  100% {
    background-image: url(../img/cat.jpg);
  }

  20% {
    background-image: url(../img/dog.jpg);
  }

  40% {
    background-image: url(../img/rabbit.jpg);
  }

  60% {
    background-image: url(../img/bird.jpg);
  }

  80% {
    background-image: url(../img/fish.jpg);
  }
}

.toggle-button {
  position: absolute;
  top: 0.75rem;
  left: 1rem;
  display: none;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  width: 30px;
  height: 21px;
}

.toggle-button .bar {
  height: 3px;
  width: 100%;
  background-color: orange;
  border-radius: 10px;
}


/* Media Query */
@media only screen and (max-width: 850px) {
  .toggle-button {
    display: flex;
  }

  .container {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-image: url("../img/mobile-bg.png");
    animation: none;
  }

  .burger {
    flex-direction: column;
    align-items: flex-start;
  }

  .bottom {
    top: 100%;
    position: sticky;
    text-align: center;
    font-size: 1em;
    background: rgba(0, 0, 0, 0.5);
    color: white;
  }


  .bottom-ul {
    padding-top: 1rem;
    display: none;
  }

  .bottom-ul li {
    display: flex;
    border-right: none;
  }

  .content img {
    width: 70%;
    height: 70%;
  }

  .content {
    position: absolute;
    left: 50%;
    top: 40%;
    transform: translate(-50%, -50%);
    text-align: center;
  }

  .instruction {
    margin-top: 5vh;
    height: 70vh;
    width: 45vh;
    overflow: auto;
    background: rgba(255, 255, 255, 0.75);
    color: #000;
    scrollbar-base-color: gold;
    padding: 10px;
    text-align: left;
  }
}