/* ========================================================================== 
   NASHORN Downloads responsive migration
   Desktop remains owned by downloads.css. This file only rebuilds responsive
   content through the canonical viewport families.
   ========================================================================== */

/* Shared non-desktop visual grammar. */
@media (min-width: 768px) and (max-width: 1199.98px) and (orientation: landscape) and (min-height: 601px),
       (min-width: 1024px) and (max-width: 1199.98px) and (orientation: portrait),
       (max-width: 767.98px),
       (min-width: 768px) and (max-width: 1023.98px) and (orientation: portrait),
       (min-width: 768px) and (max-width: 1199.98px) and (orientation: landscape) and (max-height: 600px) {
  .downloads-page .reader {
    min-width: 0;
    padding-top: var(--site-section-space-compact);
    padding-bottom: var(--site-section-space);
  }

  .downloads-page .reader__copy,
  .downloads-page .reader__stage,
  .downloads-page .reader__viewer {
    min-width: 0;
    max-width: 100%;
  }

  .downloads-page .reader__copy {
    transform: none;
  }

  .downloads-page .reader__copy > .eyebrow {
    margin-bottom: var(--site-page-eyebrow-gap);
  }

  .downloads-page .reader__copy > .eyebrow::before {
    margin-left: var(--site-eyebrow-mark-offset);
  }

  .downloads-page .reader__title {
    max-width: 12ch;
  }

  .downloads-page .reader__edition {
    gap: var(--site-action-gap);
  }

  .downloads-page .reader__edition .eyebrow.eyebrow--badge {
    font-size: var(--site-eyebrow-size);
    letter-spacing: var(--site-eyebrow-letter-spacing);
  }

  .downloads-page .reader__lead {
    max-width: 46ch;
    margin-top: var(--site-title-copy-gap);
  }

  .downloads-page .reader__copy > .btn {
    min-height: var(--site-button-min-height);
    margin-top: var(--site-title-copy-gap);
  }

  .downloads-page .reader__index button {
    min-height: var(--site-touch-target);
  }

  .downloads-page .reader__num {
    font-size: var(--site-card-feature-title-size);
  }

  .downloads-page .reader__name {
    font-size: var(--site-action-size);
    line-height: var(--site-action-line-height);
    letter-spacing: var(--site-action-letter-spacing);
  }

  .downloads-page .reader__ref {
    font-size: var(--site-meta-size);
    line-height: var(--site-meta-line-height);
    letter-spacing: var(--site-meta-letter-spacing);
  }

  .downloads-page .reader__index .icon {
    width: var(--site-action-icon-size);
    height: var(--site-action-icon-size);
  }

  .downloads-page .reader__stage {
    overflow: hidden;
  }

  .downloads-page .reader__stage::before {
    inset: 0;
  }

  .downloads-page .reader__viewer,
  .downloads-page .reader__sheet {
    max-width: 100%;
  }

  .downloads-page .reader__sheet {
    aspect-ratio: 1480 / 2094;
  }

  /* Final CTA: reuse the approved Homepage responsive composition. */
  .downloads-page .cta {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: min(570px, 100svh);
  }

  .downloads-page .cta__media {
    inset: 0;
    width: 100%;
    height: 100%;
  }

  .downloads-page .cta__media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    max-width: none;
    object-fit: cover;
    object-position: center center;
  }

  .downloads-page .cta__inner {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: inherit;
    padding-block: var(--site-section-space);
    text-align: center;
  }

  .downloads-page .cta__shift,
  .downloads-page .cta__content {
    width: 100%;
    margin-inline: auto;
  }

  .downloads-page .cta__content {
    max-width: 34rem;
  }

  .downloads-page .cta__text {
    margin-inline: auto;
  }

  .downloads-page .cta__actions {
    justify-content: center;
  }
}

/* Compact Desktop Master keeps the approved editorial split and sticky viewer. */
@media (min-width: 768px) and (max-width: 1199.98px) and (orientation: landscape) and (min-height: 601px),
       (min-width: 1024px) and (max-width: 1199.98px) and (orientation: portrait) {
  .downloads-page .reader {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    column-gap: calc(var(--site-card-gap) * 2.5);
    align-items: center;
  }

  .downloads-page .reader__stage {
    position: sticky;
    top: calc(var(--header-h) + var(--site-title-copy-gap));
    order: initial;
    width: 100%;
    height: calc(100dvh - var(--header-h) - var(--site-title-copy-gap));
    margin-inline: 0;
  }

  .downloads-page .reader__index {
    margin-top: calc(var(--site-title-copy-gap) * 2);
  }
}

/* Touch Master: intro, document, then a compact horizontal chapter rail. */
@media (max-width: 767.98px),
       (min-width: 768px) and (max-width: 1023.98px) and (orientation: portrait),
       (min-width: 768px) and (max-width: 1199.98px) and (orientation: landscape) and (max-height: 600px) {
  .downloads-page .reader {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    row-gap: var(--site-title-copy-gap);
  }

  .downloads-page .reader__copy {
    display: contents;
  }

  .downloads-page .reader__copy > .eyebrow {
    order: 1;
  }

  .downloads-page .reader__title {
    order: 2;
  }

  .downloads-page .reader__lead {
    order: 3;
    margin-block: 0;
  }

  .downloads-page .reader__copy > .btn {
    order: 4;
    width: fit-content;
    margin-top: 0;
  }

  .downloads-page .reader__stage {
    position: relative;
    top: auto;
    order: 5;
    width: 100%;
    height: min(72dvh, 48rem);
    margin: var(--site-title-copy-gap) 0 0;
    padding: var(--site-card-gap);
  }

  .downloads-page .reader__index {
    order: 6;
    min-width: 0;
    margin-top: var(--site-title-copy-gap);
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
    scroll-snap-type: x proximity;
  }

  .downloads-page .reader__index::-webkit-scrollbar {
    display: none;
  }

  .downloads-page .reader__index ol {
    display: grid;
    grid-template-columns: none;
    grid-template-rows: none;
    grid-auto-flow: column;
    grid-auto-columns: min(78vw, 20rem);
    column-gap: var(--site-card-gap);
    width: max-content;
  }

  .downloads-page .reader__index ol::before {
    content: none;
  }

  .downloads-page .reader__index li {
    scroll-snap-align: start;
  }

  .downloads-page .reader__index button,
  .downloads-page .reader__index li:nth-child(n + 6) button {
    padding: var(--site-card-compact-padding);
    border: 1px solid var(--line);
  }

  .downloads-page .reader__index button[aria-current="true"] {
    border-color: var(--nashorn-blue);
  }

  .downloads-page .reader__viewer {
    width: 100%;
    height: 100%;
  }

}

/* Mobile Portrait keeps the document stage substantial without overflow. */
@media (max-width: 767.98px) and (orientation: portrait) {
  .downloads-page .reader__stage {
    min-height: 28rem;
  }

  .downloads-page .reader__copy > .btn {
    width: 100%;
    justify-content: space-between;
  }

  .downloads-page .cta__actions {
    align-items: center;
    width: 100%;
  }

  .downloads-page .cta__actions .btn {
    width: fit-content;
    max-width: 100%;
    justify-content: center;
  }
}

/* Low-height landscape shows intro and document together, then the chapter rail. */
@media (max-width: 1199.98px) and (orientation: landscape) and (max-height: 600px) {
  .downloads-page .reader {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    grid-template-rows: repeat(4, auto) auto;
    column-gap: calc(var(--site-card-gap) * 2);
    padding-top: var(--site-card-gap);
    padding-bottom: var(--site-section-space-compact);
  }

  .downloads-page .reader__copy > .eyebrow,
  .downloads-page .reader__title,
  .downloads-page .reader__lead,
  .downloads-page .reader__copy > .btn {
    grid-column: 1;
  }

  .downloads-page .reader__copy > .eyebrow { grid-row: 1; }
  .downloads-page .reader__title { grid-row: 2; }
  .downloads-page .reader__lead { grid-row: 3; }
  .downloads-page .reader__copy > .btn { grid-row: 4; }

  .downloads-page .reader__stage {
    grid-column: 2;
    grid-row: 1 / span 4;
    height: calc(100dvh - var(--header-h) - (2 * var(--site-card-gap)));
    min-height: 0;
    margin: 0;
  }

  .downloads-page .reader__index {
    grid-column: 1 / -1;
    grid-row: 5;
  }

  .downloads-page .reader__index ol {
    grid-auto-columns: min(38vw, 18rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .downloads-page .reader__name,
  .downloads-page .reader__index .icon,
  .downloads-page .reader__num {
    transition: none;
  }
}