.jub-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,.6);
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
.jub-overlay[hidden] { display: none; }
.jub-box {
  position: relative; background: #fff; color: #222;
  max-width: 460px; width: 100%; max-height: 90vh; overflow-y: auto;
  border-radius: 12px; padding: 1.5rem; text-align: center;
}
.jub-box img { max-width: 100%; max-height: 50vh; border-radius: 8px; margin: .5rem 0 1rem; }
.jub-close {
  position: absolute; top: .5rem; right: .75rem;
  background: none; border: 0; font-size: 2rem; line-height: 1; cursor: pointer;
}