* {
    box-sizing: border-box;
  }

body {
  width: 100%;
  height: 100%;
  margin: 0 auto;
  text-align: center;
  font-family: 'Roboto', sans-serif;
  line-height: 2em;
  background: linear-gradient(rgba(255,255,255,.25), rgba(255,255,255,.25)), url('https://www.setaswall.com/wp-content/uploads/2017/08/1440x2960-HD-Wallpaper-092.jpg');
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

.nav-section {
  font-family: 'Montserrat', sans-serif;
  font-weight: bold;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 50px;
  color: white;
}

.logo {
  width: 50px;
  height: 50px;
  border: 5px solid white;
  line-height: 40px;
}

a {
  color: white;
  text-decoration: none;
}
  
.menu {
  margin-right: 10px;
}

ul {
  font-size: 16px;
  list-style-type: none;
  padding: 0;
}

.drop-down-nav > ul > li {
  padding: 20px 0;
  font-weight: bold;
}

.Navbar__Items {
  display: none;
}
  
.drop-down-nav {
  display: none;
  height: auto;
}

.drop-down-link {
  text-align: left;
  width: 100%;
  border-bottom: 1px dotted grey;
  
}

.Navbar__ToggleShow {
  display: block;  
}

.drop-down-nav > ul {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.nav-section, .drop-down-nav {
  margin: 10px 10px 0 10px;
}


h1 {
  color: white;
  padding: 20px;
  margin-top: 20px;
}

#tbDate {
  padding: 10px;
  border-radius: 5px;
}

.submit-btn {
  padding: 10px 30px;
  background-color: #0A7DFA;
  color: white;
  font-size: 15px;
  font-weight: bold;
  border: none;
  border-radius: 3px;
  margin: 20px 0;
}

.submit-btn:hover {
  cursor: pointer;
}

.image {
  width: 100%;
  max-width: 400px;
  height: auto;
  margin-top: 20px;
}

.apod-container {
  background: rgba(204, 204, 204, 0.5);
}
.apod-container > p {
  margin: 0 10px;
  font-weight: bold;
}

.apod-container > h3 {
  padding: 20px 0;
  background-color: #0A7DFA;
  color: white;
}

@media only screen and (min-width: 768px) {
  .image {
    width: 100%;
    max-width: 700px;
    height: auto;
  }

  body { 
    background: linear-gradient(rgba(255,255,255,.25), rgba(255,255,255,.25)), url('https://www.gannett-cdn.com/presto/2018/12/15/USAT/2e7b9863-85ac-4faa-aad3-096fc1826c20-GettyImages-841647034.jpg?crop=2559,1439,x0,y269&width=3200&height=1680&fit=bounds');
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;  
  }
}

@media only screen and (min-width: 1024px) {
  .image {
    width: 100%;
    max-width: 1000px;
    height: auto;
  }

  .navbar-menu, .drop-down-nav {
    display: none;
  }

  .Navbar__Items {
    display: block;
  }

  .Navbar__Items > ul > li {
    display: inline-block;
    margin: 0 20px;
  }
}