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

    body, html {
      height: 100%;
      width: 100%;
      font-family: Arial, sans-serif;
      background-color: #fff;
      color: #111;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
    }

    section.join-us {
      width: 100%;
      max-width: 480px;
      background: #fff;
      padding: 40px 30px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
      border-radius: 12px;
      text-align: center;
    }

    section.join-us h2 {
      font-size: 2rem;
      color: orangered; /* green-700 */
      margin-bottom: 30px;
    }

    form#joinForm {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    form#joinForm input[type="text"],
    form#joinForm select {
      padding: 14px 16px;
      border-radius: 10px;
      border: 1.5px solid #ddd;
      font-size: 1rem;
      outline-offset: 2px;
      transition: border-color 0.25s ease;
    }

    form#joinForm input[type="text"]:focus,
    form#joinForm select:focus {
      border-color: #16a34a; /* green-600 */
      outline: none;
      box-shadow: 0 0 6px #a5d6a7;
    }

    form#joinForm select {
      cursor: pointer;
      appearance: none;
      background: white url('data:image/svg+xml;utf8,<svg fill="%2315803d" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/></svg>') no-repeat right 12px center;
      background-size: 16px 16px;
      padding-right: 44px;
    }

    form#joinForm button[type="submit"] {
      padding: 14px 0;
      border: none;
      border-radius: 30px;
      background: linear-gradient(90deg, orangered, orangered);
      color: #fff;
      font-weight: 700;
      font-size: 1.1rem;
      cursor: pointer;
      transition: background-color 0.3s ease, opacity 0.2s ease;
      box-shadow: 0 4px 10px rgba(22, 163, 74, 0.5);
      user-select: none;
    }

    form#joinForm button[type="submit"]:hover,
    form#joinForm button[type="submit"]:focus {
      background: linear-gradient(90deg, #15803d, #16a34a);
      opacity: 0.9;
      outline: none;
    }

    /* Responsive text and spacing */
    @media (max-width: 400px) {
      section.join-us {
        padding: 30px 20px;
      }
      section.join-us h2 {
        font-size: 1.6rem;
        margin-bottom: 24px;
      }
      form#joinForm input[type="text"],
      form#joinForm select {
        font-size: 0.95rem;
        padding: 12px 14px;
      }
      form#joinForm button[type="submit"] {
        font-size: 1rem;
        padding: 12px 0;
      }
    }