#overlay {
      position: fixed;
      top: 0; left: 0;
      width: 100vw;
      height: 100vh;
      background: rgba(0, 0, 0, 0.5);
      display: none;
      justify-content: center;
      align-items: center;
      z-index: 999;
    }

    .form-container {
      background: linear-gradient(135deg, #6738FE, #4E0B91);
      max-width: 500px;
      width: 100%;
      padding: 50px 40px;
      border-radius: 20px;
      color: #fff;
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
      position: relative;
      animation: slideIn 0.5s ease-out;
    }

    @keyframes slideIn {
      from { opacity: 0; transform: translateY(30px); }
      to { opacity: 1; transform: translateY(0); }
    }

    h2 {
      text-align: center;
      margin-bottom: 30px;
      font-size: 28px;
    }

    input, select, textarea {
      width: 100%;
      padding: 14px;
      margin-top: 15px;
      border: 1px solid #ccc;
      border-radius: 8px;
      font-size: 16px;
      background-color: #FFFFFF;
      color: #000;
      box-sizing: border-box;
    }

    input::placeholder, textarea::placeholder {
      color: #777;
    }

    select {
      background-color: #FFFFFF;
      color: #000;
    }

    #bten {
      margin-top: 30px;
      width: 100%;
      background-color: #00BFFF;
      color: white;
      padding: 14px;
      font-size: 16px;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      transition: background 0.3s ease, transform 0.2s ease;
    }

    #bten:hover {
      background-color: #009ACD;
      transform: scale(1.02);
    }

    .close-btn {
      position: absolute;
      top: 15px;
      right: 20px;
      font-size: 26px;
      color: #fff;
      cursor: pointer;
      font-weight: bold;
      transition: color 0.2s ease;
    }

    .close-btn:hover {
      color: #ddd;
    }

    @media (max-width: 768px) {
      .form-container {
        padding: 30px 20px;
        border-radius: 15px;
      }

      h2 {
        font-size: 24px;
      }

      input, select, textarea {
        font-size: 15px;
      }

      #bten {
        font-size: 15px;
      }
    }