/* Basic Reset */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: #eee;
      /* Desert-to-space gradient background */
      background: linear-gradient(to bottom, #1a0a00, #4d1a00, #000c1a, #000000);
      background-attachment: fixed; /* Keeps gradient fixed during scroll */
    }

    .container {
      max-width: 1100px;
      margin: auto;
      overflow: hidden;
      padding: 0 20px;
    }

    header {
      background: rgba(10, 10, 10, 0.7); /* Semi-transparent dark background */
      color: #fff;
      padding: 1rem 0;
      text-align: center;
      border-bottom: 1px solid #555;
    }

    header h1 {
      margin-bottom: 0.5rem;
      font-size: 2.5rem;
      color: #ffcc66; /* Gold-like color */
    }

    header nav ul {
      list-style: none;
      padding: 0;
    }

    header nav ul li {
      display: inline;
      margin: 0 15px;
    }

    header nav ul li a {
      color: #fff;
      text-decoration: none;
      font-size: 1.1rem;
      transition: color 0.3s ease;
    }

    header nav ul li a:hover {
      color: #ffcc66;
    }

    main {
      padding: 20px;
      max-width: 960px;
      margin: 20px auto;
      background: rgba(20, 20, 20, 0.6); /* Slightly transparent content background */
      border-radius: 8px;
    }

    section {
      padding: 40px 20px;
      margin-bottom: 20px;
      border-bottom: 1px dashed #444;
    }

    section:last-child {
      border-bottom: none;
    }

    section h2 {
      text-align: center;
      margin-bottom: 20px;
      font-size: 2rem;
      color: #ffa500; /* Orange color */
    }

    #hero {
      text-align: center;
      padding: 60px 20px;
      background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('placeholder-desert-space.jpg'); /* Add a real image URL later */
      background-size: cover;
      background-position: center;
      color: #fff;
      border-radius: 8px;
      margin-bottom: 30px;
    }

    #hero h2 {
      font-size: 2.8rem;
      margin-bottom: 10px;
      color: #fff;
    }

    #hero p {
      font-size: 1.2rem;
    }

    #services ul {
      list-style: none;
      padding-left: 20px;
    }

    #services li {
      background: rgba(50, 50, 50, 0.5);
      margin-bottom: 10px;
      padding: 10px;
      border-left: 3px solid #ffa500;
      border-radius: 4px;
    }

    #services strong {
      color: #ffcc66;
    }

    /* Placeholder for images - replace with actual <img> or background-image */
    .image-placeholder {
      height: 200px;
      background-color: #333;
      margin: 20px auto;
      border-radius: 5px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #888;
      font-style: italic;
      background-size: cover;
      background-position: center;
    }

    .image-placeholder.refinery::after { content: '[Refinery Image Placeholder]'; }
    .image-placeholder.fuel::after { content: '[Fuel/Pump Image Placeholder]'; }
    .image-placeholder.space-contact::after { content: '[Space Theme Contact Placeholder]'; }
    /* Example using gradients if no images available */
     .image-placeholder.refinery { background: linear-gradient(to right, #b08d57, #4d4d4d); }
     .image-placeholder.fuel { background: linear-gradient(to right, #ff8c00, #cc5500); }
     .image-placeholder.space-contact { background: linear-gradient(to right, #001f3f, #000020); }


    footer {
      text-align: center;
      padding: 20px;
      margin-top: 30px;
      background: rgba(10, 10, 10, 0.8);
      color: #aaa;
      border-top: 1px solid #555;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      header h1 {
        font-size: 2rem;
      }

      header nav ul li {
        display: block;
        margin: 10px 0;
      }

      main {
        padding: 10px;
      }

      section {
        padding: 30px 10px;
      }

      #hero h2 {
        font-size: 2.2rem;
      }

      #hero p {
        font-size: 1rem;
      }

      section h2 {
        font-size: 1.8rem;
      }

      .image-placeholder {
        height: 150px;
      }
    }

    @media (max-width: 480px) {
       header h1 {
        font-size: 1.8rem;
      }
       #hero h2 {
        font-size: 1.8rem;
      }
       #hero p {
        font-size: 0.9rem;
      }
       section h2 {
        font-size: 1.5rem;
      }
    }