@media (max-width: 1180px) {
  .slide { grid-template-columns: minmax(250px, .75fr) minmax(430px, 1.25fr); gap: 34px; padding-left: 5vw; padding-right: 5vw; }
  h1, h2 { font-size: clamp(2rem, 4.2vw, 3.7rem); }
  .scene { min-height: 330px; }
  .scene-node { min-width: 96px; padding: 11px 12px; }
  .scene-node strong { font-size: .9rem; }
  .appendix-screen { grid-template-columns: minmax(250px, .72fr) minmax(430px, 1.28fr); gap: 34px; padding-left: 5vw; padding-right: 5vw; }
  .appendix-sheet { min-height: 330px; }
}

@media (max-height: 740px) and (min-width: 801px) {
  .slide { padding-top: 76px; padding-bottom: 78px; gap: 28px; }
  .slide__topline { margin-bottom: 18px; }
  h1, h2 { font-size: clamp(1.8rem, 3.6vw, 3.25rem); }
  .slide__summary { margin-top: 16px; font-size: .98rem; line-height: 1.38; }
  .slide__evidence, .slide__boundary { margin-top: 14px; padding-top: 9px; font-size: .9rem; }
  .slide__state { margin-top: 14px; }
  .slide__cta { margin-top: 13px; padding-top: 9px; }
  .scene { min-height: 300px; }
  .scene-map img, .scene-rtls .scene-map img { height: 160px; }
  .scene-footnote { bottom: 7%; }
  .presentation__note { bottom: 18px; }
}

@media (max-width: 800px) {
  .presentation { min-height: 0; }
  .presentation::before { display: none; }
  .presentation__masthead { top: 16px; left: 18px; right: 18px; }
  .masthead__name { font-size: 11px; }
  .masthead__links { gap: 4px; }
  .masthead__links a { font-size: 11px; padding: 5px 6px; }
  .slide { grid-template-columns: 1fr; grid-template-rows: auto minmax(0, 1fr); align-content: center; align-items: stretch; gap: 14px; padding: 66px 18px 84px; }
  .slide__copy { max-width: none; align-self: start; }
  .slide__visual { align-self: stretch; min-height: 0; }
  .slide__topline { margin-bottom: 12px; }
  .slide__act, .slide__index { font-size: 11px; }
  h1, h2 { max-width: 15ch; font-size: clamp(1.65rem, 7vw, 2.45rem); line-height: 1.03; }
  .slide__summary { max-width: 50ch; margin-top: 10px; font-size: 1rem; line-height: 1.35; }
  .slide__evidence, .slide__boundary { grid-template-columns: 62px 1fr; gap: 8px; margin-top: 10px; padding-top: 7px; font-size: .9rem; line-height: 1.28; }
  .slide__label { font-size: 12px; }
  .slide__state { margin-top: 9px; font-size: 12px; }
  .slide__cta { margin-top: 10px; padding-top: 7px; font-size: 12px; }
  .brand-lockup { gap: 2px; margin-top: 12px; }
  .brand-logo { width: 149px; height: 51px; }
  .brand-logo__asset { transform: scale(.63); }
  .brand-lockup__caption { font-size: 11px; }
  .scene { max-width: none; min-height: 0; height: 100%; aspect-ratio: auto; }
  .scene-sheet__header { padding: 10px 12px 9px; font-size: 11px; }
  .scene-node { min-width: 0; padding: 9px 10px; gap: 5px; }
  .scene-node__label { font-size: 11px; }
  .scene-node strong { font-size: .72rem; }
  .scene-chain { left: 4%; right: 4%; top: 43%; gap: 5px; }
  .scene-fold-panels { height: 58%; margin: 10px 3% 0; }
  .fold-panel { gap: 4px; padding: 9px 5px 10px; }
  .fold-panel__index { font-size: 12px; gap: 4px; }
  .fold-panel__index::after { width: 6px; height: 6px; }
  .fold-panel__label { margin-top: 2px; font-size: 11px; line-height: 1.05; }
  .fold-panel strong { font-size: .72rem; word-break: break-word; }
  .fold-sketch { min-height: 55px; margin-top: 6px; }
  .scene-fold-flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 5px; margin: 7px 3% 0; font-size: 11px; }
  .scene-fold-flow .flow-line { grid-column: 1 / -1; width: 100%; }
  .scene-annotation { left: 4%; bottom: 10%; font-size: .72rem; }
  .scene-annotation__mark { width: 18px; height: 18px; font-size: 11px; }
  .scene-fragments { left: 5%; top: 20%; width: 45%; gap: 2px; }
  .fragment { padding: 6px 4px; gap: 7px; transform: translateX(calc(var(--fragment-index) * 3px)); font-size: 11px; }
  .fragment__dot { width: 6px; height: 6px; }
  .scene-gap { left: 56%; top: 33%; font-size: 11px; }
  .scene-fragment-note { left: 65%; top: 23%; right: 4%; font-size: .72rem; }
  .scene-map-grid, .scene-rtls { gap: 8px; padding: 18px 4% 0; }
  .scene-map img, .scene-rtls .scene-map img, .scene-turnaround__map .scene-map img { height: 115px; }
  .scene-map figcaption { padding: 6px 7px; font-size: 11px; }
  .scene-legend { gap: 9px; padding: 8px 4%; font-size: 11px; }
  .scene-camera { gap: 10px; padding: 20px 4% 0; }
  .scene-camera__readout { gap: 5px; font-size: 11px; }
  .scene-camera__readout strong { font-size: .75rem; }
  .scene-camera__zone { left: 8px; bottom: 7px; font-size: 11px; }
  .scene-footnote { left: 4%; right: 4%; bottom: 7%; font-size: 11px; }
  .scene-rule-table { margin: 24px 4% 0; }
  .scene-rule-table__row { gap: 5px; padding: 8px 0; font-size: .72rem; }
  .scene-rule-table__row strong, .scene-rule-table__row--head { font-size: 11px; }
  .scene-correlation { gap: 4px; padding: 42px 4% 0; }
  .scene-correlation .scene-node { padding: 7px 5px; }
  .scene-correlation .scene-node strong { font-size: .72rem; }
  .scene-response { gap: 10px; padding: 25px 5% 0; }
  .scene-response__incident { padding: 12px; gap: 5px; }
  .scene-response__incident strong { font-size: .8rem; }
  .scene-response__states { gap: 4px; margin-top: 12px; }
  .response-state { padding: 7px 5px; font-size: 11px; }
  .scene-safety-grid { gap: 4px 10px; padding: 28px 5% 0; }
  .scene-safety-item { grid-template-columns: 25px 1fr; gap: 4px 7px; min-height: 58px; padding: 8px 0; }
  .scene-safety-item strong { font-size: .75rem; }
  .scene-safety-item small { font-size: .72rem; }
  .scene-safety-signal { grid-template-columns: auto 1fr auto; gap: 5px; margin: 14px 5% 0; padding-top: 8px; font-size: 11px; }
  .scene-safety-signal strong { font-size: 11px; font-weight: 400; white-space: nowrap; }
  .scene-safety-note { left: 5%; right: 5%; bottom: 19%; gap: 7px; font-size: .72rem; }
  .scene-safety-note__mark { width: 18px; height: 18px; }
  .scene-output { grid-template-columns: .72fr 26px 1.28fr; gap: 8px; padding: 28px 5% 0; }
  .scene-report { gap: 6px; padding: 9px; }
  .scene-destinations { gap: 5px; }
  .scene-destinations span { padding: 8px 6px; font-size: 11px; }
  .scene-evidence-signals { display: grid; gap: 5px; margin: 14px 5% 0; padding-top: 7px; font-size: 11px; }
  .scene-governance { grid-template-columns: 1fr 28px 1fr; gap: 8px; padding: 28px 5% 0; }
  .scene-governance__rail { gap: 6px; }
  .scene-governance__item { gap: 4px; min-height: 57px; padding: 8px 7px; }
  .scene-governance__item strong { font-size: .72rem; }
  .scene-governance__baseline { grid-template-columns: 1fr; gap: 5px; margin: 13px 5% 0; padding-top: 7px; font-size: 11px; }
  .scene-turnaround { gap: 8px; padding: 24px 4% 0; }
  .turn-slot { grid-template-columns: 44px 1fr; gap: 5px; padding: 8px 0; }
  .turn-slot strong { font-size: 11px; }
  .turn-slot span { font-size: .72rem; }
  .scene-steps { gap: 4px; margin: 34px 4% 0; }
  .scene-step { min-height: 70px; padding: 7px; gap: 6px; }
  .scene-step span { font-size: 11px; }
  .scene-step strong { font-size: .72rem; }
  .scene-implementation-line { left: 4%; right: 4%; top: 57%; }
  .scene-implementation__outputs { grid-template-columns: repeat(2, 1fr); gap: 6px; margin: 17px 4% 0; padding-top: 7px; font-size: 11px; }
  .scene-pilot { margin: 38px 4% 0; }
  .scene-pilot__column { gap: 6px; padding: 10px 6px 12px; }
  .scene-pilot__column span { font-size: 11px; }
  .scene-pilot__column strong { font-size: .8rem; }
  .scene-pilot__column small { font-size: .72rem; }
  .scene-pilot__line { gap: 5px; margin: 12px 4% 0; font-size: 11px; }
  .presentation__nav { right: 18px; bottom: 18px; gap: 7px; }
  .presentation__nav button { width: 32px; height: 32px; }
  .presentation__counter { min-width: 52px; font-size: 12px; }
  .presentation__note { left: 18px; top: auto; bottom: 26px; max-width: 44%; font-size: 12px; }

  .appendix__masthead { top: 16px; left: 18px; right: 18px; }
  .appendix__masthead .masthead__name { font-size: 11px; }
  .appendix__actions { gap: 4px; }
  .appendix-close { font-size: 11px; }
  .appendix-screen { grid-template-columns: 1fr; grid-template-rows: auto minmax(0, 1fr); align-content: center; gap: 12px; padding: 66px 18px 84px; }
  .appendix__copy { max-width: none; }
  .appendix__kicker { margin-bottom: 10px; font-size: 11px; }
  .appendix__copy h2 { max-width: 16ch; font-size: clamp(1.55rem, 6.8vw, 2.35rem); }
  .appendix__copy p { margin-top: 10px; font-size: .92rem; line-height: 1.35; }
  .appendix__legend { gap: 5px; margin-top: 10px; }
  .state-chip { padding: 5px 6px; font-size: 11px; }
  .appendix-sheet { max-width: none; min-height: 0; height: 100%; padding: 10px 12px 12px; }
  .appendix-sheet__header { padding-bottom: 9px; font-size: 11px; }
  .appendix-status { margin-top: 8px; }
  .appendix-status-row { grid-template-columns: 92px 1fr; gap: 8px; padding: 9px 0; font-size: .78rem; line-height: 1.23; }
  .appendix-personas { min-height: 0; margin-top: 8px; }
  .appendix-persona { gap: 6px; padding: 9px 6px; }
  .appendix-persona__role { font-size: 11px; line-height: 1.05; }
  .appendix-persona strong { font-size: .76rem; line-height: 1.1; }
  .appendix-persona p { font-size: .7rem; line-height: 1.25; }
  .appendix-chain { margin-top: 8px; }
  .appendix-chain__item { grid-template-columns: 24px 80px 1fr; gap: 6px; padding: 8px 0; }
  .appendix-chain__item > span:first-child { font-size: 11px; }
  .appendix-chain__item strong { font-size: .78rem; }
  .appendix-chain__item small { font-size: .7rem; line-height: 1.22; }
  .appendix-note { margin-top: 8px; font-size: .72rem; line-height: 1.25; }
  .appendix-delivery { grid-template-columns: repeat(5, minmax(0, 1fr)); margin-top: 12px; }
  .appendix-delivery li { min-height: 0; gap: 5px; padding: 8px 4px; }
  .appendix-delivery li > span { font-size: 11px; }
  .appendix-delivery strong { font-size: .72rem; line-height: 1.08; }
  .appendix-delivery small { font-size: .72rem; line-height: 1.16; overflow-wrap: anywhere; }
  .appendix__slots { margin-top: 8px; padding-top: 7px; font-size: 11px; line-height: 1.25; }
  .appendix__nav { right: 18px; bottom: 18px; gap: 7px; }
  .appendix__nav button { width: 32px; height: 32px; }
  .appendix__nav [data-appendix-counter] { min-width: 52px; font-size: 11px; }
}

/* Mobile portrait is a scrollable reading surface, not a compressed 16:9 frame. */
@media (max-width: 800px) {
  html,
  body {
    height: auto;
    min-height: 100%;
    overflow-x: clip;
    overflow-y: auto;
    overscroll-behavior-x: none;
    scrollbar-color: var(--line-strong) var(--bg);
    scrollbar-width: thin;
  }

  .presentation {
    width: 100%;
    height: auto;
    min-height: 100dvh;
    overflow: visible;
  }

  .presentation__track,
  .appendix__track {
    height: auto;
    min-height: 100dvh;
    overflow: visible;
    touch-action: pan-y pinch-zoom;
  }

  .slide {
    height: auto;
    min-height: 100dvh;
    grid-template-rows: auto auto;
    align-content: start;
    gap: 18px;
    padding:
      calc(76px + env(safe-area-inset-top, 0px))
      max(18px, env(safe-area-inset-right, 0px))
      calc(132px + env(safe-area-inset-bottom, 0px))
      max(18px, env(safe-area-inset-left, 0px));
    overflow: visible;
  }

  .slide[data-active="true"] {
    position: relative;
    inset: auto;
  }

  .slide__topline {
    margin-top: 16px;
  }

  h1,
  h2 {
    max-width: 17ch;
    font-size: clamp(2rem, 7.2vw, 4rem);
    line-height: 1.02;
  }

  .slide__summary {
    margin-top: 14px;
    line-height: 1.45;
    text-wrap: pretty;
  }

  .slide__evidence,
  .slide__boundary {
    grid-template-columns: 1fr;
    gap: 5px;
    margin-top: 14px;
    padding-top: 10px;
    font-size: 1.02rem;
    line-height: 1.42;
  }

  .slide__label {
    display: block;
  }

  .slide__state {
    margin-top: 13px;
  }

  .slide__visual {
    min-height: 0;
  }

  .scene {
    height: auto;
    min-height: 320px;
    aspect-ratio: 1 / 1;
  }

  .scene-sheet {
    min-height: 320px;
  }

  .slide--correlation .scene {
    min-height: 460px;
    aspect-ratio: auto;
  }

  .slide--correlation .scene-sheet {
    min-height: 460px;
  }

  .scene-correlation {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 5px;
    padding: 16px 7% 56px;
  }

  .scene-correlation .scene-node {
    width: 100%;
    min-height: 48px;
    gap: 4px;
    padding: 8px 10px;
  }

  .scene-correlation .scene-node strong {
    overflow-wrap: anywhere;
  }

  .scene-correlation .scene-link {
    width: 1px;
    height: 13px;
    min-width: 1px;
    flex: 0 0 13px;
    margin-left: 24px;
  }

  .scene-correlation .scene-link::after {
    right: -3px;
    top: auto;
    bottom: 0;
    transform: rotate(135deg);
  }

  .slide--implementation .scene {
    min-height: 410px;
    aspect-ratio: auto;
  }

  .slide--implementation .scene-sheet {
    min-height: 410px;
  }

  .scene-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
    margin: 18px 4% 0;
  }

  .scene-step {
    min-height: 58px;
    gap: 5px;
    padding: 8px;
  }

  .scene-step:last-child {
    grid-column: 1 / -1;
  }

  .scene-implementation-line {
    display: none;
  }

  .scene-implementation__outputs {
    margin-top: 14px;
  }

  .presentation__masthead,
  .appendix__masthead {
    top: max(12px, env(safe-area-inset-top, 0px));
    left: max(18px, env(safe-area-inset-left, 0px));
    right: max(18px, env(safe-area-inset-right, 0px));
  }

  .masthead__links a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    padding: 7px 8px;
  }

  .presentation__nav,
  .appendix__nav {
    right: max(18px, env(safe-area-inset-right, 0px));
    bottom: max(18px, env(safe-area-inset-bottom, 0px));
  }

  .presentation__nav button,
  .appendix__nav button {
    width: 44px;
    height: 44px;
    touch-action: manipulation;
  }

  .presentation__note {
    left: max(18px, env(safe-area-inset-left, 0px));
    bottom: calc(24px + env(safe-area-inset-bottom, 0px));
    max-width: min(48%, 26ch);
    line-height: 1.35;
  }

  .presentation__appendix {
    position: fixed;
    overflow-x: clip;
    overflow-y: auto;
    overscroll-behavior-y: contain;
    touch-action: pan-y pinch-zoom;
  }

  .appendix-screen {
    height: auto;
    min-height: 100dvh;
    grid-template-rows: auto auto;
    align-content: start;
    gap: 18px;
    padding:
      calc(76px + env(safe-area-inset-top, 0px))
      max(18px, env(safe-area-inset-right, 0px))
      calc(92px + env(safe-area-inset-bottom, 0px))
      max(18px, env(safe-area-inset-left, 0px));
    overflow: visible;
  }

  .appendix-screen[data-active="true"] {
    position: relative;
    inset: auto;
  }

  .appendix-sheet {
    height: auto;
    min-height: 320px;
  }
}

@media (max-width: 340px) {
  .scene,
  .scene-sheet {
    min-height: 310px;
  }

  .masthead__name {
    max-width: 15ch;
  }
}