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

    body {
      font-family: Arial, sans-serif;
      background-color: black;
      color: white;
      line-height: 1.6;
    }

    a {
      text-decoration: none;
      color: white;
      transition: color 0.3s ease;
    }

    a:hover {
      color: gray;
    }

    /* Header */
    header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: black;
      padding: 15px 0;
      border-bottom: 1px solid #222;
      z-index: 1000;
    }

    header .container {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0 20px;
    }

    header h1 {
      font-size: 24px;
      font-weight: bold;
    }

    nav a {
      margin-left: 20px;
      font-size: 16px;
    }

    /* Hero Section */
    #home {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      max-width: 1200px;
      margin: 0 auto;
      padding: 140px 20px 50px;
    }

    #home .text {
      max-width: 500px;
      text-align: left;
    }

    #home .text p {
      color: gray;
      margin-bottom: 5px;
    }

    #home h1 {
      font-size: 48px;
      margin-bottom: 5px;
    }

    #home h2 {
      font-size: 24px;
      color: #bbb;
      margin-bottom: 20px;
    }

    #home .btn {
      display: inline-block;
      background: white;
      color: black;
      padding: 10px 20px;
      border-radius: 5px;
      transition: background 0.3s ease;
    }

    #home .btn:hover {
      background: #ddd;
    }

    #home img {
      margin-top: 20px;
      width: 350px;
      border-radius: 10px;
      box-shadow: 0 0 15px rgba(255, 255, 255, 0.1);
    }

    /* About Section */
    #about {
      text-align: center;
      max-width: 700px;
      margin: 80px auto;
      padding: 0 20px;
    }

    #about h2 {
      font-size: 32px;
      margin-bottom: 20px;
    }

    #about p {
      color: #aaa;
      font-size: 18px;
    }

    /* Contact Section */
    #contact {
      background: black;
      text-align: center;
      padding: 80px 20px;
    }

    #contact .double-line {
      width: 800px; /* width of double line */
      margin: 0 auto 30px auto; /* center & margin below */
      border-top: 3px solid white;
      border-bottom: 3px solid white;
    }

    #contact h2 {
      font-size: 32px;
      margin-bottom: 20px;
    }

    #contact p {
      color: #aaa;
      margin-bottom: 30px;
    }

    #contact .social {
      display: flex;
      justify-content: center;
      gap: 20px;
      font-size: 32px;
    }

    #contact .social a {
      color: white;
      transition: color 0.3s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    #contact .social a:hover {
      color: gray;
    }

    /* Footer */
    footer {
      text-align: center;
      color: gray;
      border-top: 1px solid #222;
      padding: 20px;
      font-size: 14px;
    }

    /* Responsive */
    @media (min-width: 768px) {
      #home {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
      }

      #home img {
        margin-top: 0;
      }
    }