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

    body {
      font-family: Arial, Helvetica, sans-serif;
      background: #f5f7fb;
      color: #222;
      line-height: 1.7;
    }

    .container {
      max-width: 1000px;
      margin: 40px auto;
      background: #ffffff;
      padding: 50px;
      border-radius: 14px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    }

    h1 {
      font-size: 38px;
      margin-bottom: 10px;
      color: #111827;
    }

    .subtitle {
      color: #6b7280;
      margin-bottom: 40px;
      font-size: 17px;
    }

    h2 {
      margin-top: 35px;
      margin-bottom: 15px;
      color: #111827;
      font-size: 28px;
      border-left: 5px solid #16a34a;
      padding-left: 12px;
    }

    p {
      margin-bottom: 15px;
      font-size: 17px;
    }

    ul {
      margin-left: 25px;
      margin-bottom: 20px;
    }

    li {
      margin-bottom: 10px;
      font-size: 17px;
    }

    .highlight {
      background: #ecfdf5;
      padding: 18px;
      border-left: 5px solid #16a34a;
      border-radius: 8px;
      margin: 20px 0;
    }

    .email-box {
      background: #111827;
      color: #fff;
      padding: 18px;
      border-radius: 10px;
      margin-top: 20px;
      font-size: 18px;
      word-break: break-word;
    }

    a {
      color: #22c55e;
      text-decoration: none;
      font-weight: bold;
    }

    footer {
      margin-top: 50px;
      padding-top: 20px;
      border-top: 1px solid #ddd;
      color: #6b7280;
      font-size: 15px;
    }

    @media (max-width: 768px) {
      .container {
        padding: 25px;
        margin: 15px;
      }

      h1 {
        font-size: 30px;
      }

      h2 {
        font-size: 24px;
      }

      p, li {
        font-size: 16px;
      }
    }