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

    body, html {
      height: 100%;
      font-family: Arial, sans-serif;
    }

    .modal-overlay {
      position: fixed;
      top: 0; left: 0;
      width: 100%; height: 100%;
      background-color: rgba(0, 0, 0, 0.6);
      display: flex;
      justify-content: center;
      align-items: center;
      z-index: 1000;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.5s ease;
    }

    .modal-overlay.show {
      opacity: 1;
      pointer-events: auto;
    }

    .modal-content {
      position: relative;
      background: white;
      padding: 2rem;
      border-radius: 16px;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
      text-align: center;
      max-width: 400px;
      width: 90%;
      animation: fadeInUp 0.5s ease-out forwards;
    }

    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(40px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .close-btn {
      position: absolute;
      top: 10px;
      right: 15px;
      font-size: 24px;
      background: none;
      border: none;
      cursor: pointer;
      color: #999;
    }

    .close-btn:hover {
      color: #333;
    }

    .action-btn {
      padding: 0.75rem 1.5rem;
      font-size: 16px;
      background: #f2be00;
      color: white;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      transition: background 0.3s ease;
    }

    .action-btn:hover {
      background: #0056b3;
    }