/* =========================================================================
   ZKCAP-X · V2 · responsive.css
   Layer 5b. Semantic recomposition.
   Driven by the .app container width, so the Runtime viewport simulator
   (390 / 768 / 1440 / full) is deterministic and independent of the
   real browser window.
   ========================================================================= */

/* ---------------------------------------------------------------------
   Wide desktop — 1080px+ : full multi-column product composition
   --------------------------------------------------------------------- */
@container app (min-width: 1080px) {
  .hero__in { grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr); }
  .mkt__layout { grid-template-columns: 268px minmax(0, 1fr); }
}

/* ---------------------------------------------------------------------
   Laptop — below 1080px : collapse the asymmetric two-column forms
   --------------------------------------------------------------------- */
@container app (max-width: 1079px) {
  .hero__in { gap: var(--s-7); }
  .phead__grid { gap: var(--s-5); }
  .split--aside { grid-template-columns: minmax(0, 1fr) minmax(0, 300px); }
  .split--rail { grid-template-columns: minmax(0, 1fr) minmax(0, 240px); }
  .article { grid-template-columns: minmax(0, 1fr) 232px; gap: var(--s-6); }
  .mega__in { grid-template-columns: minmax(0, 1fr) minmax(0, 260px); }
}

/* ---------------------------------------------------------------------
   Tablet — 900px and below: mega menu becomes the nav sheet
   --------------------------------------------------------------------- */
@container app (max-width: 900px) {
  .pnav { display: none; }
  .masthead__burger { display: grid; }
  .masthead__main { height: 62px; }
  .masthead__utility-in { font-size: 9px; }
  .masthead__utility-in > .t-label { display: none; }
  .masthead__utility-links { gap: var(--s-3); }
  .masthead__utility-links a:nth-child(n + 3) { display: none; }

  /* Detail rails become ordered sections, not side columns */
  .split--aside,
  .split--rail,
  .split--wide-first,
  .split { grid-template-columns: minmax(0, 1fr); }
  .sticky-rail { position: static; }

  /* Article: TOC moves above the body as a compact jump list */
  .article { grid-template-columns: minmax(0, 1fr); gap: var(--s-5); }
  .article__toc { position: static; order: -1; }
  .article__toc-list { display: flex; flex-wrap: wrap; gap: 6px; }
  .article__toc-item { padding: 6px 10px; border: 1px solid var(--rule); border-radius: var(--radius-pill); font-size: var(--fs-xs); }

  /* Marketplace: filter rail becomes an overlay trigger */
  .mkt__layout { grid-template-columns: minmax(0, 1fr); }
  .mkt__filterbtn { display: inline-flex; }
  .mkt__filters { display: none; }
  .mkt__layout[data-filters="open"] .mkt__filters { display: block; }

  /* Horizontal process rail recomposes to an ordered vertical rail */
  .rail { grid-auto-flow: row; grid-auto-columns: auto; }
  .rail__cell { padding: var(--s-4) 0; border-bottom: 1px solid var(--rule-soft); }
  .rail__cell + .rail__cell { padding-left: 0; }
  .rail__cell + .rail__cell::before { display: none; }
  .rail__cell:last-child { border-bottom: 0; }

  /* Focus shell: single column, context rail below the form */
  .focus__main { grid-template-columns: minmax(0, 1fr); }
  .focus__col { order: -1; border-left: 0; border-bottom: 1px solid var(--rule); }
  .focus__col-in { max-width: 560px; }
  .focus__rail { padding-block: var(--s-6); }
  .focus__col--wide .focus__col-in { max-width: 560px; }
}

/* ---------------------------------------------------------------------
   Tablet portrait — 768px: task-first onboarding, stacked everything
   --------------------------------------------------------------------- */
@container app (max-width: 768px) {
  :root {
    --section-y: 52px;
    --section-y-lg: 60px;
  }

  /* Hero composes: copy first, art as a supporting band */
  .hero__in { grid-template-columns: minmax(0, 1fr); gap: var(--s-6); padding-block: 40px 44px; }
  .hero__copy { max-width: none; }
  .hero__art { aspect-ratio: 1 / 0.6; max-width: 560px; }
  .hero__proof { gap: var(--s-2) var(--s-4); }

  .phead__grid { grid-template-columns: minmax(0, 1fr); }
  .phead__aside { justify-items: start; }
  .shead--split { grid-template-columns: minmax(0, 1fr); align-items: start; }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .ctaband__in { grid-template-columns: minmax(0, 1fr); gap: var(--s-5); padding-block: var(--s-7); }
  .ctaband__actions .btn { flex: 1 1 auto; }

  .provhero { grid-template-columns: 60px minmax(0, 1fr); gap: var(--s-4); }
  .provhero__seal { width: 60px; height: 60px; font-size: 9px; }
  .provhero > .btn, .provhero > .cluster { grid-column: 1 / -1; justify-self: start; }
  .provhero__name { font-size: 1.36rem; }

  /* Comparison table → stacked comparison cards */
  .compare__head { display: none; }
  .compare { display: grid; gap: var(--s-3); border: 0; background: transparent; gap: 0; }
  .compare__row {
    grid-template-columns: minmax(0, 1fr) !important;
    border: 1px solid var(--rule) !important;
    border-radius: var(--radius-md);
    background: var(--bg-raised);
    margin-bottom: var(--s-3);
    overflow: hidden;
  }
  .compare__cell--k {
    grid-column: 1 / -1;
    border-right: 0 !important;
    background: var(--paper-200) !important;
    padding-block: 9px;
    border-bottom: 1px solid var(--rule-soft);
  }
  .compare__cell { position: relative; padding-left: 42px; font-size: var(--fs-sm); }
  .compare__cell::before {
    content: attr(data-col);
    position: absolute;
    left: var(--s-4);
    top: 14px;
    font-family: var(--font-mono);
    font-size: 8.5px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-400);
    max-width: 32px;
    line-height: 1.3;
  }
  .compare__caption { border-radius: var(--radius-md); }

  /* Requirement matrix → stacked records */
  .matrix__head { display: none; }
  .matrix__row {
    grid-template-columns: minmax(0, 1fr) !important;
    border: 1px solid var(--rule) !important;
    border-radius: var(--radius-sm);
    margin-bottom: var(--s-2);
    overflow: hidden;
  }
  .matrix__cell { position: relative; padding-left: 38px; }
  .matrix__cell--k { border-bottom: 1px solid var(--rule-soft); background: var(--paper-100); padding-block: 9px; }
  .matrix__cell::before {
    content: attr(data-col);
    position: absolute;
    left: 12px;
    top: 13px;
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-400);
    max-width: 28px;
    line-height: 1.3;
  }
  .matrix__cell--k::before { content: ""; }

  .readiness__top { flex-direction: column; align-items: flex-start; }
  .readiness__meter { width: 100%; }

  .ob__nav { flex-direction: column-reverse; align-items: stretch; }
  .ob__nav .btn { width: 100%; }
  .ob__nav-l { width: 100%; }
  .ob__nav-l .btn { flex: 1; }

  .foot__top { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-5); }
  .foot__brand { grid-column: 1 / -1; max-width: none; }
}

/* ---------------------------------------------------------------------
   Phone — 620px and below: single column, task-first
   --------------------------------------------------------------------- */
@container app (max-width: 620px) {
  :root {
    --gutter: 18px;
    --section-y: 44px;
    --section-y-lg: 50px;
  }

  .masthead__utility { display: none; }
  .masthead__main { grid-template-columns: auto 1fr auto; height: 58px; gap: var(--s-3); }
  .masthead__actions { gap: 6px; }
  .masthead__signin { display: none; }
  .brand__sub { display: none; }
  .brand__name { font-size: 1.04rem; }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .domgrid { grid-template-columns: minmax(0, 1fr); }
  .pillars { grid-template-columns: minmax(0, 1fr); gap: var(--s-5); }
  .jstrip { grid-template-columns: minmax(0, 1fr); }
  .ob__grid { grid-template-columns: minmax(0, 1fr); }

  .hero__in { padding-block: 34px 38px; }
  .hero__art { aspect-ratio: 1 / 0.52; }
  .hero__ctas { display: grid; grid-template-columns: minmax(0, 1fr); }
  .hero__ctas .btn { width: 100%; }
  .hero__strip-in { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero__strip-cell { padding: var(--s-4) var(--s-3); border-bottom: 1px solid rgba(244, 241, 234, 0.08); }

  .domainrail__in { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .domainrail__cell { padding: var(--s-4) var(--s-3); border-bottom: 1px solid var(--rule-soft); }
  .domainrail__cell:nth-child(2n) { border-right: 0; }

  .lifecycle__track { grid-template-columns: minmax(0, 1fr); }
  .lifecycle__stage { padding: var(--s-4) 0; border-left: 0 !important; border-bottom: 1px solid var(--rule-soft); padding-left: 0; }
  .lifecycle__stage:last-child { border-bottom: 0; }

  .rolediagram__cell { border-right: 0; border-bottom: 1px solid var(--rule-soft); }
  .rolediagram__cell:last-child { border-bottom: 0; }

  .factrow { grid-template-columns: minmax(0, 1fr) !important; }
  .fact { border-right: 0; border-bottom: 1px solid var(--rule-soft); }

  .dl__row { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .reqs__row { grid-template-columns: 20px 1fr; }
  .reqs__who { grid-column: 2; padding-top: 4px; }

  .focus__col, .focus__rail { padding-block: var(--s-5); }
  .focus__col-in { max-width: none; }
  .focus__secure span { display: none; }
  .focus__back span { display: none; }
  .otp { gap: 5px; }
  .otp__cell { width: 100%; height: 46px; }
  .intentcard__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .handoff { padding: var(--s-4); }

  .foot__top { grid-template-columns: minmax(0, 1fr); }
  .foot__bottom { flex-direction: column; align-items: flex-start; gap: var(--s-3); }

  .mkt__toolbar { gap: var(--s-2); }
  .mkt__toolbar .search { width: 100%; }
  .svc-card { grid-template-columns: 38px 1fr; gap: var(--s-3); }
  .svc-card__mark { width: 38px; height: 38px; }
  .prov-card { grid-template-columns: 44px 1fr; gap: var(--s-3); }
  .prov-card__seal { width: 44px; height: 44px; font-size: 9px; }

  .tabs { gap: var(--s-4); }
  .toasts { right: var(--s-3); left: var(--s-3); bottom: var(--s-3); width: auto; }

  /* Drawer and modal both become bottom sheets on phone */
  .ov--drawer .ov__panel,
  .ov--modal .ov__panel,
  .ov--sheet .ov__panel {
    top: auto;
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    max-height: 90%;
    border-left: 0;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    border-top: 1px solid var(--rule);
    animation: sheet-in var(--dur-3) var(--ease-out) both;
  }
  .ov--drawer .ov__grip,
  .ov--modal .ov__grip { display: block; }
  .ov__foot { flex-direction: column-reverse; align-items: stretch; }
  .ov__foot .btn { width: 100%; }
}

/* ---------------------------------------------------------------------
   Narrow phone — 420px
   --------------------------------------------------------------------- */
@container app (max-width: 420px) {
  .hero__strip-in { grid-template-columns: minmax(0, 1fr); }
  .domainrail__in { grid-template-columns: minmax(0, 1fr); }
  .domainrail__cell { border-right: 0; }
  .intentcard__grid { grid-template-columns: minmax(0, 1fr); }
  .factrow { grid-template-columns: minmax(0, 1fr) !important; }
  .ob__legend { flex-direction: column; align-items: flex-start; gap: 4px; }
  .pkg__head { flex-direction: column; }
  .pkg__price { text-align: left; }
}

/* ---------------------------------------------------------------------
   Overlay presentation adaptation (desktop context → drawer/modal)
   --------------------------------------------------------------------- */
@container app (min-width: 621px) {
  .ov--sheet .ov__panel {
    top: 0;
    bottom: 0;
    left: auto;
    right: 0;
    width: min(520px, 100%);
    max-height: none;
    border-radius: 0;
    border-top: 0;
    border-left: 1px solid var(--rule);
    animation: ov-in var(--dur-3) var(--ease-out) both;
  }
  .ov--sheet .ov__grip { display: none; }
}

/* ---------------------------------------------------------------------
   Capability, not device: pointer & motion preferences
   --------------------------------------------------------------------- */
@media (hover: none) {
  .pnav__link:hover { background: none; }
  .domain-card:hover, .card--interactive:hover, a.card:hover, button.card:hover,
  a.svc-card:hover, a.juris-card:hover, a.prov-card:hover, a.res-card:hover,
  button.pkg:hover { transform: none; }
  .btn:hover { transform: none; }
}

@media (prefers-contrast: more) {
  :root {
    --rule: #8A7A5C;
    --rule-strong: #5E5236;
    --ink-500: #3A434C;
    --ink-400: #4E5862;
  }
}

/* ---------------------------------------------------------------------
   Print
   --------------------------------------------------------------------- */
@media print {
  .lab, .masthead, .foot, .toasts, .ov, .skip-link { display: none !important; }
  .app { display: block; }
  .on-navy, .band--dark, .band--deep { background: none; color: var(--ink-900); }
  body { background: #fff; }
}