/* ========== POPUP / MODAL STYLES ========== */
    .popup-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.75);
      backdrop-filter: blur(8px);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 1000;
      visibility: hidden;
      opacity: 0;
      transition: visibility 0.3s, opacity 0.3s;
    }

    .popup-overlay.active {
      visibility: visible;
      opacity: 1;
    }

    .popup-container {
      background: linear-gradient(145deg, #111827, #0f1722);
      border-radius: 32px;
      max-width: 500px;
      width: 90%;
      padding: 30px;
      border: 1px solid rgba(47, 169, 201, 0.4);
      box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
      transform: scale(0.9);
      transition: transform 0.2s ease;
      position: relative;
    }

    .popup-overlay.active .popup-container {
      transform: scale(1);
    }

    .popup-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 25px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding-bottom: 15px;
    }

    .popup-header h2 {
      font-size: 1.8rem;
      background: linear-gradient(135deg, #fff, #2fa9c9);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .close-popup {
      background: rgba(255,255,255,0.1);
      border: none;
      font-size: 28px;
      cursor: pointer;
      color: white;
      width: 38px;
      height: 38px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s;
    }

    .close-popup:hover {
      background: #ff4757;
      transform: rotate(90deg);
    }

    .package-name-badge {
      background: rgba(47, 169, 201, 0.2);
      display: inline-block;
      padding: 5px 15px;
      border-radius: 30px;
      font-size: 0.8rem;
      margin-bottom: 20px;
      border: 1px solid #2fa9c9;
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 500;
      font-size: 0.9rem;
      color: #ccddee;
    }

    .form-group input, .form-group select {
      width: 100%;
      padding: 12px 15px;
      border-radius: 16px;
      border: 1px solid rgba(255,255,255,0.2);
      background: rgba(0,0,0,0.4);
      color: white;
      font-family: 'Poppins', sans-serif;
      font-size: 0.95rem;
      transition: 0.2s;
    }

    .form-group input:focus, .form-group select:focus {
      outline: none;
      border-color: #2fa9c9;
      box-shadow: 0 0 8px rgba(47, 169, 201, 0.4);
    }

    .radio-group {
      display: flex;
      gap: 20px;
      margin-top: 5px;
    }

    .radio-group label {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: normal;
      cursor: pointer;
    }

    .submit-bill-btn {
      width: 100%;
      background: linear-gradient(90deg, #2fa9c9, #0f5e7a);
      padding: 14px;
      border: none;
      border-radius: 40px;
      font-weight: bold;
      font-size: 1rem;
      color: white;
      cursor: pointer;
      margin-top: 10px;
      transition: 0.2s;
    }

    .submit-bill-btn:hover {
      background: linear-gradient(90deg, #3cb9d9, #1a6e8a);
      transform: scale(1.01);
    }

    .success-message {
      text-align: center;
      padding: 20px;
      background: rgba(46, 204, 113, 0.2);
      border-radius: 20px;
      border: 1px solid #2ecc71;
    }

    @media (max-width: 700px) {
      .pricing-title { font-size: 2rem; }
      .pricing-wrapper { gap: 20px; }
      .pricing-card { width: 280px; }
    }