.photo-grid img:focus-visible {
  outline: 3px solid #475569;
  outline-offset: 3px;
}
.modal {
  display: block;
  visibility: hidden;
  opacity: 0;
  position: fixed;
  inset: 0;
  background: rgba(9, 12, 17, 0.96);
  z-index: 100;
  transition: opacity 180ms ease, visibility 180ms;
  color: #fff;
  overscroll-behavior: contain;
}
.modal.open {
  visibility: visible;
  opacity: 1;
  /* Make controls focusable immediately; only the opacity animates on open. */
  transition-property: opacity;
}
.modal-viewport {
  position: absolute;
  top: calc(64px + env(safe-area-inset-top, 0px));
  bottom: calc(84px + env(safe-area-inset-bottom, 0px));
  left: 0;
  right: 0;
  overflow: hidden;
  touch-action: pinch-zoom;
}
.img-strip {
  position: relative;
  height: 100%;
  width: 100%;
}
.strip-slot {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
}
.strip-slot.is-current {
  opacity: 1;
  pointer-events: auto;
  z-index: 1;
}
.strip-slot img {
  display: block;
  max-width: calc(100% - 160px);
  max-height: 100%;
  object-fit: contain;
  border-radius: 4px;
  user-select: none;
  -webkit-user-drag: none;
}
.strip-slot img[hidden] { display: none; }
.modal button {
  display: grid;
  place-items: center;
  position: absolute;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 50%;
  color: #fff;
  background: rgba(255,255,255,0.07);
  cursor: pointer;
  font: inherit;
  font-size: 25px;
  line-height: 1;
  transition: background 150ms ease;
  z-index: 2;
}
.modal button:hover { background: rgba(255,255,255,0.18); }
.modal button:focus-visible { outline: 2px solid white; outline-offset: 4px; }
.modal button[hidden] { display: none; }
.modal-close {
  top: calc(12px + env(safe-area-inset-top, 0px));
  right: max(16px, env(safe-area-inset-right, 0px));
}
.modal button.modal-nav {
  width: 56px;
  height: 56px;
  box-sizing: border-box;
  top: calc(50% - 10px + (env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px)) / 2);
  transform: translateY(-50%);
  background: rgba(20, 24, 30, 0.75);
}
.modal button.modal-nav:hover { background: rgba(55, 61, 70, 0.95); }
.modal-nav svg {
  display: block;
  width: 24px;
  height: 24px;
  pointer-events: none;
}
.modal-nav.prev { left: max(12px, env(safe-area-inset-left, 0px)); }
.modal-nav.next { right: max(12px, env(safe-area-inset-right, 0px)); }
.modal-footer {
  position: absolute;
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  left: 64px;
  right: 64px;
  text-align: center;
  pointer-events: none;
  font-size: 14px;
  line-height: 1.5;
}
.modal-caption { margin: 0; color: rgba(255,255,255,0.9); }
.modal-status { min-height: 1.5em; margin: 3px 0 0; color: #a9b1bd; font-size: 12px; }
@media (max-width: 600px) {
  .strip-slot img { max-width: calc(100% - 24px); }
}
@media (prefers-reduced-motion: reduce) {
  .modal, .modal button, .photo-grid img { transition: none; }
}