/* Niagara only: phone landscape. Portrait and mouse-driven layouts are unchanged. */
@media (max-width: 980px) and (orientation: landscape) and (hover: none) and (pointer: coarse) {
  /* Scroll the whole drawer instead of collapsing its chapter list. */
  #case-index {
    height: calc(100vh - var(--top));
    height: calc(100dvh - var(--top));
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior-y: contain;
    -webkit-overflow-scrolling: touch;
    padding-bottom: env(safe-area-inset-bottom, 0px);
    scroll-padding-block: 12px;
  }
  #case-index > .index-heading,
  #case-index > .index-nav,
  #case-index > .index-mobile-photographs,
  #case-index > .index-foot {
    flex: 0 0 auto;
  }
  #case-index > .index-nav {
    overflow: visible;
  }
  /* Keep a generous touch target without the boxed appearance. */
  .niagara-photo-story.is-fullscreen .niagara-photo-caption-close {
    position: fixed;
    top: max(8px, env(safe-area-inset-top, 0px));
    right: max(12px, env(safe-area-inset-right, 0px));
    width: 44px;
    height: 44px;
    z-index: 50;
    display: grid;
    place-items: center;
    padding: 0;
    border: 0;
    border-radius: 0;
    color: #f4f0e8;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    -webkit-appearance: none;
    appearance: none;
    -webkit-tap-highlight-color: transparent;
    font: 26px/1 Arial, Helvetica, sans-serif;
    letter-spacing: 0;
    touch-action: manipulation;
  }
  .niagara-photo-story.is-fullscreen .niagara-photo-caption-close:focus:not(:focus-visible) {
    outline: none;
  }
  .niagara-photo-story.is-fullscreen .niagara-photo-caption-close:focus-visible {
    outline: 1px solid currentColor;
    outline-offset: 2px;
  }
}
@media (min-width: 821px) and (max-width: 980px) and (orientation: landscape) and (hover: none) and (pointer: coarse) {
  /* A non-scrolling top gutter keeps caption text below the close control,
     including while the caption itself is scrolled. Image sizing is unchanged. */
  .niagara-photo-story.is-fullscreen .niagara-photo-caption {
    border-top: 64px solid #10110f;
    padding-top: 18px;
  }
}