* {
    box-sizing: border-box;
  }

  body {
    width: 100%;
    margin: 0 auto;
    text-align: center;
    font-family: 'Roboto', sans-serif;
    line-height: 2em;
    background: linear-gradient(rgba(255,255,255,0.25), rgba(255,255,255,0.25)), url('https://edgy.app/wp-content/uploads/2018/02/Mars-featured-image.jpg');
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    color: white;
  }

  .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;
  }


  header > h1 {
    
    border-radius: 5px;
    padding: 20px 0;
  }
  
  h2 {
    padding: 10px 0;
  }

  .date-section {
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 20px;
    background: rgba(204, 204, 204, 0.5);
    color: black;
  }

  .date-section > p {
    font-weight: bold;
    color: red;
  }

  #tbDate {
    padding: 10px;
    border-radius: 5px;
  }
  section > h3 {
    font-size: 22px;
    margin-top: 20px;
  }

  .top-header {
    padding: 50px 0 30px 0;
    background-image: url('https://wallpaperplay.com/walls/full/e/0/a/54074.jpg');
    margin-bottom: 30px;
  }

  .date-box {
    margin: 20px;
    font-size: 15px;
  }
  
  .image {
    width: 100%;
    height: auto;
    margin-bottom: 50px;
  }

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

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

  .error-message {
    color: red;
    font-weight: bold;
    font-size: 15px;
  }

  .rover-name {
    font-size: 22px;
    background-color: #0A7DFA;
    padding: 20px;
    margin-top: 0;
    color: white;
    width: 100%;
    margin-bottom: 0;
  }

  h4 {
    color: white;
    padding: 10px 0;
    width: 50%;
    margin: 20px auto;
    border-radius: 3px;
  }

  .active-status {
    background-color: green;
  }

  .complete-status {
    background-color: red;
  }

  .mars-image {
    width: 100px;
    height: 100px;
    margin: 5px;
  }
  
  .rover-container {
    margin: 20px 0;
  }

  .rover-image {
    width: 100%;
    height: 300px;
    margin-bottom: 0;
  }

  .rover-image {
    cursor: pointer;
  }

  .rover-container > ul {
    list-style-type: none;
    padding: 0 10px;
    text-align: left;
    color: black;
    font-weight: bold;
  }

  .rover-header {    
    text-align: center;
    max-width: 100%;
  }

  article:hover {
    opacity: 0.5;
  }

  .rover-header > a {
    text-decoration: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    border-radius: 5px;
  }

  .rover-image-container {
    margin: 20px 0;
    border: 3px solid white;
    line-height: 2em;
    border-radius: 5px;
    background: rgba(204, 204, 204, 0.5);
  }

  .bold-text {
    font-weight: bold;
    color: red;
  }

  .hidden {
    display: none;
  }

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

  .date-section {
    width: 50%;
    margin: 0 auto;
  }

  .mars-image {
    width: 200px;
    height: 200px;
  }
}

@media only screen and (min-width: 1200px) {
  body {
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(255,255,255,.25), rgba(255,255,255,.25)), url('https://mars.nasa.gov/system/resources/detail_files/22147_evolution-of-a-martian-16.jpg');
    background-position: center;
    background-size: 100% 100%;
    background-repeat: no-repeat;
    background-attachment: fixed;
  }

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

  .Navbar__Items {
    display: block;
  }

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

  .rover-image-container {
    width: 30%;
  }
  .individual-rover {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    align-items: center;
  }

  .rover-header {
    min-width: 350px;
  }
  
  .rover-header > h4 {
    width: 80%;
    margin: 22px auto;
  }

  .rover-image {
    width: 100%;
    height: 300px;
  }

  .flex {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    align-items: center;
  }

  .mars-image {
    width: 200px;
    height: 200px;
  }
  
  .rover-container {
    border: none;
    height: 100%;
    margin: 0 10px;
  }

  .right-border {
    border-right: 3px solid white;
  }
}