body {
      background: #0b0b0b;
      color: #d8ffd8;
      font-family: 'Poppins', sans-serif;
      line-height: 1.7;
      margin: 0;
    }

    header {
      background: #0c0c0c;
      border-bottom: 1px solid #1c1c1c;
      padding: 20px 0;
      text-align: center;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
    }

    header img {
      height: 50px;
      filter: drop-shadow(0 0 6px #3f8f3f);
    }

    main {
      max-width: 950px;
      margin: 60px auto;
      padding: 0 20px;
    }

    h1, h2 {
      color: #76ff76;
      text-shadow: 0 0 10px #1b7f3f;
    }

    h1 {
      text-align: center;
      margin-bottom: 40px;
      font-size: 2.2rem;
    }

    h2 {
      font-size: 1.5rem;
      border-left: 4px solid #38a838;
      padding-left: 10px;
      margin-top: 40px;
    }

    p, li {
      color: #b8ffb8;
    }

    code {
      background: #111;
      color: #76ff76;
      padding: 3px 6px;
      border-radius: 4px;
      font-family: monospace;
    }

    pre {
      background: #111;
      border: 1px solid #1c1c1c;
      color: #76ff76;
      padding: 15px;
      border-radius: 8px;
      overflow-x: auto;
      box-shadow: inset 0 0 12px rgba(0, 255, 100, 0.1);
    }

    .btn-back {
      display: inline-block;
      background: #1b7f3f;
      color: white;
      padding: 10px 18px;
      border-radius: 8px;
      text-decoration: none;
      transition: all 0.3s;
      font-weight: 600;
    }

    .btn-back:hover {
      background: #38a838;
      box-shadow: 0 0 10px #38a838;
    }

    footer {
      background: #0c0c0c;
      border-top: 1px solid #1c1c1c;
      color: #7aff7a;
      text-align: center;
      padding: 20px;
      margin-top: 60px;
    }