/* Overlay */
    .popup-overlay {
      position: fixed;
      top: 0; left: 0;
      width: 100%; height: 100%;
      background: rgba(0,0,0,0.6);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 9999;
    }

    /* Popup box */
    .popup-box {
      background: #fff;
      padding: 20px;
      max-width: 350px;
      width: 90%;
      border-radius: 12px;
      text-align: center;
      box-shadow: 0 5px 15px rgba(0,0,0,0.3);
      animation: popIn 0.3s ease-out;
    }

    @keyframes popIn {
      from { transform: scale(0.7); opacity: 0; }
      to { transform: scale(1); opacity: 1; }
    }

    .popup-box h2 {
      font-size: 1.3rem;
      margin-bottom: 15px;
      color: #e91e63;
    }

    .timer {
      font-size: 1.1rem;
      font-weight: bold;
      color: #333;
      margin: 10px 0 20px;
    }

    .popup-box button {
      background: #e91e63;
      color: white;
      border: none;
      padding: 10px 16px;
      margin: 5px;
      border-radius: 8px;
      cursor: pointer;
      font-size: 1rem;
      transition: 0.2s;
    }

    .popup-box button:hover {
      background: #c2185b;
    }

    @media (max-width: 480px) {
      .popup-box {
        padding: 15px;
      }
      .popup-box h2 {
        font-size: 1.1rem;
      }
      .popup-box button {
        font-size: 0.9rem;
        padding: 8px 14px;
      }
    }