/* Only the mounted split-paper workspace owns the viewport. Leaving it restores
   normal document scrolling, including the legacy paper catalogue. */
html.practice-viewport {
  --practice-viewport-height: 100vh;
  height: 100%;
  overflow: hidden;
}

@supports (height: 100dvh) {
  html.practice-viewport { --practice-viewport-height: 100dvh; }
}

html.practice-viewport body {
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

html.practice-viewport .practice-shell {
  height: var(--practice-viewport-height);
  min-height: 0;
  overflow: hidden;
}

html.practice-viewport .practice-shell .main-area,
html.practice-viewport .practice-focus-page {
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

/* Width alone used to stack landscape phones into two tiny rows. Keep the
   existing portrait layout; use two independently scrolling columns here. */
@media (max-width: 900px) and (orientation: landscape) {
  .practice-viewport .authorized-practice-workspace .authorized-practice-dual-pane {
    grid-template-columns: minmax(0, var(--practice-first-size, 50%)) minmax(0, 1fr);
    grid-template-rows: minmax(0, 1fr);
    gap: 22px;
  }

  .practice-viewport .authorized-practice-workspace .authorized-practice-pane {
    grid-column: auto;
    grid-row: 1;
    height: 100% !important;
    padding-top: 52px;
  }

  .practice-viewport .authorized-practice-splitter {
    top: 0;
    right: auto;
    bottom: 0;
    left: calc(var(--practice-first-size, 50%) + 2px);
    width: 18px;
    height: auto;
    border-top: 0;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    border-left: 1px solid var(--line);
    cursor: col-resize;
  }

  .practice-viewport .authorized-practice-splitter span {
    width: 4px;
    height: 54px;
  }

  .practice-viewport body.is-practice-splitting { cursor: col-resize; }

  /* A long paper title must not consume all the short landscape viewport. */
  .practice-viewport .authorized-practice-workspace .authorized-pane-heading {
    padding: 10px 14px;
  }

  .practice-viewport .authorized-pane-heading h2 {
    font-size: 16px;
    line-height: 1.3;
  }

  .practice-viewport .authorized-practice-workspace .authorized-passage-content,
  .practice-viewport .authorized-practice-workspace .authorized-order-source {
    padding: 12px 16px 24px;
  }
}