html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

.popup-fullscreen {
  display: none; /* default: tidak tampil */
}

@media (max-width: 768px) {
  .popup-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom right, #000000, #440000);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    padding: 20px;
    box-sizing: border-box;
    animation: fadeZoomIn 0.7s ease-out;
  }

  .popup-link {
    text-decoration: none;
  }

  .popup-content {
    position: relative;
    text-align: center;
    width: 80%;
    max-width: 300px;
  }

  .popup-img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(255,255,255,0.3);
    display: block;
  }

  .popup-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 6vw;
    text-shadow: 2px 2px 5px #000;
    animation: bounce 1.5s infinite;
    font-weight: bold;
    pointer-events: none; /* biar klik tetap ke <a> */
  }

  /* Animasi masuk popup */
  @keyframes fadeZoomIn {
    0% {
      opacity: 0;
      transform: scale(0.8);
    }
    100% {
      opacity: 1;
      transform: scale(1);
    }
  }

  /* Animasi gerak teks (memantul) */
  @keyframes bounce {
    0%, 100% {
      transform: translate(-50%, -50%) scale(1);
    }
    50% {
      transform: translate(-50%, -60%) scale(1.1);
    }
  }
}