body {
  background-image: url("../images/earth-background.png");
  background-repeat: no-repeat;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  background-attachment: fixed;
}

h1 {
  text-align: center;
}

section {
  background: none;
  border-radius: 5px;
  box-shadow: 0 10px 20px;
  margin: 50px;
  width: 40%;
  color: white;
  padding: 20px;
}

img {
  border-radius: 50px;
  padding: 5px;
  width: 200px;
  height: 200px;
  object-fit: cover;
}

.title {
  color: aliceblue;
  text-align: center;
}

footer {
  text-align: center;
  color: aliceblue;
}

.navbar {
  position: fixed;
  width: 100%;
}

.button {
  margin: 0 auto;
  text-align: center;
}

button {
  background-color: blue;
  color: aliceblue;
  border-radius: 9px;
}

button:hover {
  box-shadow: 0 10px 20px gray;
  background-color: blueviolet;
}

.earth {
  background-image: url("../images/earth-background.png");
}

.jupiter {
  background-image: url("../images/jupiter-background.png");
}

.mars {
  background-image: url("../images/mars-background.png");
}

.mercury {
  background-image: url("../images/mercury-background.png");
}

.moon {
  background-image: url("../images/moon-background.png");
}

.neptune {
  background-image: url("../images/neptune-background.png");
}

.pluto {
  background-image: url("../images/pluto.png");
}

.saturn {
  background-image: url("../images/saturn-background.png");
}

.solarsystem {
  background-image: url("../images/solar-system.png");
}

.sun {
  background-image: url("../images/sun-backgound.png");
}

.uranus {
  background-image: url("../images/uranus-background.png");
}

.venus {
  background-image: url("../images/venus-background.png");
}

@media (max-width: 900px) {
  section {
    background: grey;
    border-radius: 5px;
    box-shadow: 0 10px 20px;
    margin: 0 auto;
    margin-bottom: 20px;
    width: 60%;
    color: white;
    text-align: center;
    padding: 10px;
    margin-top: 50px;
  }

  h3 {
    text-align: center;
    margin-bottom: 20px;
  }

  .navbar-brand {
    font-size: 14px;
  }
}