.obra-lightbox {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s ease;
  }

  .obra-lightbox.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .obra-lightbox__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
  }

  .obra-lightbox__close {
    position: absolute;
    top: calc(1.5rem + env(safe-area-inset-top, 0));
    right: calc(1.5rem + env(safe-area-inset-right, 0));
    z-index: 100002;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: #fff;
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    border-radius: 50%;
    transition: background 0.2s;
  }

  .obra-lightbox__close:hover {
    background: rgba(255, 255, 255, 0.3);
  }

  .obra-lightbox__content {
    position: relative;
    z-index: 100001;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
  }

  .obra-lightbox__image {
    /* Mismo marco para todas las obras; la imagen encaja sin deformar (letterboxing si hace falta) */
    --obra-lb-frame: min(90vw, 85vh, 85dvh);
    width: var(--obra-lb-frame);
    height: var(--obra-lb-frame);
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    object-position: center;
    box-sizing: border-box;
    flex-shrink: 0;
    transform-origin: center center;
    cursor: grab;
    touch-action: none;
  }

  .obra-lightbox__image:active {
    cursor: grabbing;
  }