@layer stack-atlas {
  .page--stack main {
    width: min(100% - 32px, 1440px);
  }

  .page--stack .stack-atlas {
    display: grid;
    gap: var(--size-5);
    margin-top: calc(var(--size-fluid-4) * -0.25);
  }

  .page--stack .stack-atlas__map-header {
    display: grid;
    gap: 0.85rem;
    max-width: 72ch;
    padding-inline: 0.25rem;
  }

  .page--stack .stack-atlas__map-header h1 {
    margin: 0;
    font-family: var(--font-serif-custom);
    font-size: clamp(2.6rem, 5vw, 4.5rem);
    line-height: 0.94;
    letter-spacing: -0.05em;
    text-wrap: balance;
  }

  .page--stack .stack-atlas__map-header > p:last-child {
    margin: 0;
    color: var(--ink-1);
    font-size: 1.08rem;
    line-height: 1.8;
  }

  .page--stack .stack-atlas__clusters {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--size-4);
    align-items: stretch;
  }

  .page--stack .stack-atlas__cluster {
    display: grid;
    gap: 0.95rem;
    align-content: start;
    padding: 1rem;
    border-radius: 24px;
    border: 1px solid rgba(17, 17, 17, 0.08);
    background: rgba(255, 255, 255, 0.84);
    transition:
      transform 0.2s var(--ease-out),
      box-shadow 0.2s var(--ease-out),
      background-color 0.2s var(--ease-out),
      opacity 0.2s var(--ease-out);
  }

  .page--stack .stack-atlas__cluster.is-selected {
    background: rgba(255, 253, 248, 0.98);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
  }

  .page--stack .stack-atlas__cluster.is-dimmed {
    opacity: 0.6;
  }

  .page--stack .stack-atlas__cluster-header {
    display: block;
  }

  .page--stack .stack-atlas__cluster-heading {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  .page--stack .stack-atlas__cluster-link {
    font-size: clamp(1.1rem, 1.8vw, 1.35rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    text-decoration: none;
  }

  .page--stack .stack-atlas__cluster > p {
    margin: 0;
    color: var(--ink-1);
    line-height: 1.65;
  }

  .page--stack .stack-atlas__pieces {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-auto-rows: 1fr;
    gap: 0.75rem;
  }

  .page--stack .stack-atlas__piece {
    display: grid;
    gap: 0.35rem;
    align-content: start;
    min-height: 6.4rem;
    height: 100%;
    padding: 0.9rem 0.95rem;
    border-radius: 18px;
    border: 1px solid rgba(17, 17, 17, 0.08);
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(250, 247, 242, 0.9) 100%);
    text-decoration: none;
    transition:
      transform 0.2s var(--ease-out),
      box-shadow 0.2s var(--ease-out),
      background-color 0.2s var(--ease-out),
      border-color 0.2s var(--ease-out),
      opacity 0.2s var(--ease-out);
  }

  .page--stack .stack-atlas__piece:hover,
  .page--stack .stack-atlas__piece:focus-visible,
  .page--stack .stack-atlas__piece.is-selected {
    transform: translateY(-1px);
    box-shadow: var(--shadow-soft);
    border-color: rgba(17, 17, 17, 0.16);
    background: #fffdf8;
  }

  .page--stack .stack-atlas__piece.is-dimmed {
    opacity: 0.52;
  }

  .page--stack .stack-atlas__piece strong {
    font-size: 0.92rem;
    line-height: 1.3;
    letter-spacing: -0.02em;
    word-break: break-word;
  }

  .page--stack .stack-atlas__piece small {
    color: var(--ink-2);
    font-size: 0.78rem;
  }

  .page--stack .stack-drill {
    display: grid;
    gap: var(--size-5);
    margin-top: calc(var(--size-fluid-4) * -0.25);
  }

  .page--stack .stack-drill__top {
    display: flex;
    justify-content: flex-start;
  }

  .page--stack .stack-drill__back {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.75rem 1rem;
    border-radius: 999px;
    border: 1px solid rgba(17, 17, 17, 0.08);
    background: rgba(255, 255, 255, 0.78);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
  }

  .page--stack .stack-drill__hero {
    display: grid;
    gap: var(--size-4);
    align-items: start;
  }

  .page--stack .stack-drill__intro {
    display: grid;
    gap: 0.95rem;
    max-width: 68ch;
  }

  .page--stack .stack-drill__intro h1 {
    margin: 0;
    font-family: var(--font-serif-custom);
    font-size: clamp(2.8rem, 5vw, 4.8rem);
    line-height: 0.94;
    letter-spacing: -0.05em;
    text-wrap: balance;
  }

  .page--stack .stack-drill__intro > p:last-child {
    margin: 0;
    color: var(--ink-1);
    font-size: 1.08rem;
    line-height: 1.8;
  }

  .page--stack .stack-drill__section {
    display: grid;
    gap: 1rem;
    padding: 1.1rem;
    border-radius: 24px;
    border: 1px solid rgba(17, 17, 17, 0.08);
    background: rgba(255, 255, 255, 0.84);
  }
  .page--stack .stack-drill__doc p,
  .page--stack .stack-drill__list-item p {
    margin: 0;
    color: var(--ink-1);
    line-height: 1.65;
  }

  .page--stack .stack-drill__content {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(18rem, 0.75fr);
    gap: var(--size-4);
    align-items: start;
  }

  .page--stack .stack-drill__primary,
  .page--stack .stack-drill__secondary {
    display: grid;
    gap: var(--size-4);
    align-content: start;
  }

  .page--stack .stack-drill__section-heading {
    display: grid;
    gap: 0.35rem;
  }

  .page--stack .stack-drill__section-heading h2 {
    margin: 0;
    font-size: clamp(1.25rem, 2vw, 1.7rem);
    line-height: 1.1;
    letter-spacing: -0.03em;
  }

  .page--stack .stack-drill__docs,
  .page--stack .stack-drill__list {
    display: grid;
    gap: 0.85rem;
  }

  .page--stack .stack-drill__doc,
  .page--stack .stack-drill__list-item {
    display: grid;
    gap: 0.45rem;
    padding: 0.95rem 1rem;
    border-radius: 18px;
    border: 1px solid rgba(17, 17, 17, 0.08);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(250, 247, 242, 0.9) 100%);
  }

  .page--stack .stack-drill__doc {
    text-decoration: none;
    transition:
      transform 0.2s var(--ease-out),
      box-shadow 0.2s var(--ease-out),
      border-color 0.2s var(--ease-out),
      background-color 0.2s var(--ease-out);
  }

  .page--stack .stack-drill__doc:hover,
  .page--stack .stack-drill__doc:focus-visible {
    transform: translateY(-1px);
    box-shadow: var(--shadow-soft);
    border-color: rgba(17, 17, 17, 0.16);
    background: #fffdf8;
  }

  .page--stack .stack-drill__doc-meta {
    margin: 0;
    color: var(--ink-2);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .page--stack .stack-drill__doc h3,
  .page--stack .stack-drill__list-item h3 {
    margin: 0;
    font-size: 1.02rem;
    line-height: 1.35;
    letter-spacing: -0.02em;
  }

  .page--stack .stack-drill__list-item {
    text-decoration: none;
    transition:
      transform 0.2s var(--ease-out),
      box-shadow 0.2s var(--ease-out),
      border-color 0.2s var(--ease-out),
      background-color 0.2s var(--ease-out);
  }

  .page--stack .stack-drill__list-item:hover,
  .page--stack .stack-drill__list-item:focus-visible {
    transform: translateY(-1px);
    box-shadow: var(--shadow-soft);
    border-color: rgba(17, 17, 17, 0.16);
    background: #fffdf8;
  }

  .page--stack .stack-drill__empty {
    display: grid;
    gap: 0.5rem;
    padding: 1.25rem;
    border-radius: 18px;
    border: 1px dashed rgba(17, 17, 17, 0.12);
    background: rgba(255, 253, 248, 0.92);
  }

  .page--stack .stack-drill__empty h2,
  .page--stack .stack-drill__empty p {
    margin: 0;
  }

  @supports (content-visibility: auto) {
    .page--stack .stack-atlas__clusters {
      content-visibility: auto;
      contain-intrinsic-size: 1500px;
    }
  }

  @media (max-width: 980px) {
    .page--stack .stack-atlas__clusters {
      grid-template-columns: 1fr;
    }

    .page--stack .stack-drill__content {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 760px) {
    .page--stack main {
      width: min(100% - 24px, 1440px);
    }

    .page--stack .stack-atlas__pieces {
      grid-template-columns: 1fr;
    }
  }
}