:root {
  --paper: #f4efe2;
  --paper-strong: #e7ddc3;
  --paper-soft: #fbf7ec;
  --ink: #111111;
  --muted: #514c42;
  --red: #d92d20;
  --blue: #1d4ed8;
  --yellow: #f7c948;
  --line: #111111;
  --frame: 2px solid var(--line);
  --shadow-strong: 6px 6px 0 var(--line);
  --shadow-soft: 4px 4px 0 var(--line);
  --space-xs: 0.5rem;
  --space-s: 0.875rem;
  --space-m: 1.25rem;
  --space-l: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4.5rem;
  --max-width: 74rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 7.25rem;
}

body {
  margin: 0;
  font-family: Futura, "Avenir Next", Avenir, Montserrat, Arial, sans-serif;
  line-height: 1.5;
  color: var(--ink);
  background:
    linear-gradient(90deg, transparent 0 12%, rgba(17, 17, 17, 0.03) 12% 12.2%, transparent 12.2% 100%),
    linear-gradient(180deg, var(--paper) 0%, #f8f4ea 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
}

section[id] {
  scroll-margin-top: 7.25rem;
}

.site-shell {
  min-height: 100vh;
}

.site-header,
.site-footer,
.hero-panel,
.transition-block,
.content-card,
.editorial-aside,
.bauhaus-block,
.quote-block {
  border: var(--frame);
  box-shadow: var(--shadow-strong);
}

.site-header,
.site-footer,
.site-main {
  width: min(calc(100% - 2rem), var(--max-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  margin-top: 1rem;
  background: var(--paper-soft);
  backdrop-filter: blur(10px);
}

.site-header__inner,
.site-header__subnav,
.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-m);
  padding: var(--space-m);
}

.site-header__subnav {
  border-top: var(--frame);
  background: color-mix(in srgb, var(--paper-strong) 72%, white);
  justify-content: flex-start;
  gap: var(--space-s);
  padding: 0.7rem 1rem 1rem;
}

.site-header__inner,
.site-header__subnav {
  gap: var(--space-s);
  padding: 1rem;
}

.site-header__subnav {
  padding: 0.7rem 1rem 1rem;
}

.site-main {
  padding: var(--space-l) 0 var(--space-2xl);
}

.site-brand {
  display: grid;
  gap: 0.2rem;
  align-content: start;
}

.site-directory {
  display: grid;
  gap: 0.5rem;
  justify-items: end;
  flex: 1 1 34rem;
}

.site-directory__label {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.site-brand__eyebrow {
  color: var(--muted);
}

.site-brand:hover .site-brand__eyebrow {
  color: var(--red);
}

.kicker,
.site-brand__eyebrow,
.section-heading__eyebrow,
.transition-block__eyebrow,
.site-footer__eyebrow,
.editorial-aside__label,
.bauhaus-block__label,
.content-card__meta,
.chapter-hero__period {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.display-title,
.site-brand__title,
.chapter-hero__title,
.home-opening__title,
.section-heading__title,
.site-footer__title,
.transition-block__title {
  margin: 0;
  font-size: clamp(2rem, 4.4vw, 4.2rem);
  line-height: 1.08;
  text-transform: uppercase;
  max-width: 12ch;
  text-wrap: balance;
  overflow-wrap: anywhere;
}

.site-brand__title {
  font-size: clamp(1.35rem, 2.1vw, 2.1rem);
  line-height: 0.98;
  max-width: 16ch;
}

.site-nav,
.site-footer__links,
.chapter-hero__links,
.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.7rem;
}

.site-nav--rooms {
  width: 100%;
  justify-content: flex-end;
  padding: 0.55rem;
  border: var(--frame);
  background: color-mix(in srgb, var(--paper-strong) 52%, white);
  box-shadow: var(--shadow-soft);
}

.nav-link,
.nav-chip,
.room-tab,
.button-link,
.site-footer__link {
  display: inline-block;
  padding: 0.65rem 0.95rem;
  border: var(--frame);
  background: white;
  box-shadow: var(--shadow-soft);
  font-weight: 700;
  line-height: 1.3;
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease,
    background-color 0.18s ease,
    color 0.18s ease;
}

.site-header__inner > *,
.site-header__subnav > *,
.home-opening__intro > *,
.opening-signposts > *,
.route-band > *,
.content-grid > *,
.dual-column > *,
.artifact-grid > *,
.image-strip > *,
.portrait-grid > *,
.room-band__hero > *,
.highlight-mosaic > * {
  min-width: 0;
}

.nav-link,
.site-footer__link {
  background: var(--paper-soft);
  font-size: 0.92rem;
}

.nav-link {
  font-size: 0.84rem;
  padding: 0.5rem 0.75rem;
}

.nav-chip {
  display: grid;
  gap: 0.1rem;
  padding: 0.45rem 0.7rem;
  background: color-mix(in srgb, var(--paper-soft) 88%, white);
  box-shadow: none;
  border: 1.5px solid rgba(17, 17, 17, 0.3);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-chip__eyebrow {
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
}

.nav-chip__title {
  font-size: 0.76rem;
  line-height: 1.15;
  text-transform: uppercase;
}

.room-tab {
  display: grid;
  gap: 0.15rem;
  min-width: 9rem;
  padding: 0.55rem 0.75rem;
  background: color-mix(in srgb, var(--paper-soft) 86%, white);
  align-content: start;
}

.room-tab__eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
}

.room-tab__title {
  font-size: 0.82rem;
  line-height: 1.15;
  text-transform: uppercase;
}

.room-tab[aria-current="page"] {
  background: var(--ink);
  color: white;
}

.room-tab[aria-current="page"] .room-tab__eyebrow {
  color: var(--yellow);
}

.room-tab--hero {
  background: var(--yellow);
  color: var(--ink);
  font-weight: 600;
}

.room-tab--hero .room-tab__eyebrow {
  color: var(--ink);
}

.nav-link:hover,
.button-link:hover,
.site-footer__link:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--line);
}

.nav-chip:hover {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--line);
}

.nav-chip[aria-current="page"] {
  background: var(--ink);
  color: white;
  border-color: var(--ink);
}

.nav-chip[aria-current="page"] .nav-chip__eyebrow {
  color: var(--yellow);
}

.room-tab:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--line);
}

.button-link--dark {
  background: var(--ink);
  color: white;
}

.button-link--light {
  background: var(--paper-soft);
  color: var(--ink);
}

.hero-panel {
  position: relative;
  overflow: hidden;
  background: #fffdf7;
  padding: clamp(1.85rem, 3vw, 3rem);
}

.hero-panel > * {
  position: relative;
  z-index: 1;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 7rem;
  background: linear-gradient(180deg, color-mix(in srgb, var(--chapter-accent, var(--red)) 10%, transparent), transparent);
  opacity: 1;
  pointer-events: none;
}

.theme-home { --chapter-accent: var(--red); }
.theme-golden { --chapter-accent: var(--yellow); }
.theme-marvel { --chapter-accent: var(--red); }
.theme-cinematic { --chapter-accent: var(--blue); }
.theme-proof { --chapter-accent: var(--yellow); }
.theme-cast { --chapter-accent: var(--red); }
.theme-guide { --chapter-accent: var(--blue); }

.home-opening,
.chapter-hero,
.chapter-section {
  position: relative;
  display: grid;
  gap: var(--space-m);
  margin-bottom: var(--space-2xl);
}

.home-opening {
  gap: 1rem;
}

.home-opening__intro {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(16rem, 0.7fr);
  gap: var(--space-m);
  align-items: start;
}

.home-opening__intro--immersive {
  grid-template-columns: minmax(0, 1.05fr) minmax(18rem, 0.95fr);
}

.home-opening__copy {
  display: grid;
  gap: 1rem;
  align-content: start;
  max-width: 34rem;
}

.home-opening__stage {
  position: relative;
  min-height: 38rem;
  display: grid;
  gap: var(--space-s);
  align-content: end;
  justify-items: start;
  padding-bottom: 1.25rem;
}

.feature-object {
  margin: 0;
}

.feature-object--primary {
  transform: rotate(-1.2deg);
  width: min(100%, 28rem);
}

.feature-object--primary img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
  box-shadow: var(--shadow-strong);
}

.feature-object--primary figcaption {
  padding: 0.7rem 0.8rem;
  border: var(--frame);
  background: var(--paper-soft);
  box-shadow: var(--shadow-soft);
}

.floating-card {
  position: absolute;
  width: min(15rem, 38%);
  max-width: 15rem;
  padding: 0.9rem;
  border: var(--frame);
  box-shadow: var(--shadow-strong);
  background: rgba(255, 253, 247, 0.97);
  z-index: 2;
}

.floating-card--top {
  top: 2.2rem;
  right: 0.35rem;
  transform: rotate(-2deg);
}

.floating-card__label {
  margin: 0 0 0.6rem;
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
}

.floating-card__body {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.home-opening__title,
.chapter-hero__title {
  text-wrap: balance;
}

.chapter-hero {
  grid-template-columns: minmax(0, 1.1fr) minmax(18rem, 0.9fr);
  align-items: start;
}

.chapter-hero__support {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.chapter-hero__links,
.button-row {
  row-gap: var(--space-s);
}

.copy,
.copy-secondary,
.home-opening__lede,
.chapter-hero__lede,
.chapter-section__body,
.site-footer__copy,
.transition-block__copy,
.editorial-aside__body,
.content-card__description,
.content-card__footer,
.chapter-list li,
.quote-block {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--muted);
}

.copy-secondary {
  font-size: 0.95rem;
  color: var(--muted);
  margin: 0.5rem 0 0;
}

.home-opening__lede,
.chapter-hero__lede,
.transition-block__copy,
.site-footer__copy {
  max-width: 62ch;
}

.opening-note,
.signpost-card {
  border: var(--frame);
  background: white;
  box-shadow: var(--shadow-soft);
}

.opening-note {
  padding: 1rem;
  display: grid;
  gap: 0.5rem;
}

.opening-note__label,
.signpost-card__label,
.hero-card__note {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.opening-note__label,
.signpost-card__label {
  color: var(--red);
}

.opening-note__body,
.signpost-card__body {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.opening-signposts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-m);
  margin-bottom: var(--space-2xl);
}

.route-band {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(16rem, 0.9fr);
  gap: 1.25rem;
  align-items: center;
  margin-bottom: var(--space-2xl);
  padding: 0.5rem 0 0.75rem;
}

.route-band__track {
  display: grid;
  gap: 0.9rem;
}

.route-band__track span {
  display: block;
  height: 1rem;
  border: var(--frame);
  box-shadow: var(--shadow-soft);
  background: linear-gradient(90deg, var(--yellow), white 55%);
}

.route-band__track span:nth-child(2) {
  width: 82%;
  justify-self: end;
  background: linear-gradient(90deg, var(--red), white 55%);
}

.route-band__track span:nth-child(3) {
  width: 62%;
  background: linear-gradient(90deg, var(--blue), white 55%);
}

.signpost-card {
  padding: 1rem;
  display: grid;
  gap: 0.55rem;
  align-content: start;
}

.signpost-card__title {
  margin: 0;
  font-size: 1.05rem;
  text-transform: uppercase;
  line-height: 1.2;
  text-wrap: balance;
  overflow-wrap: anywhere;
}

.home-opening__principles,
.content-grid,
.dual-column,
.artifact-grid,
.image-strip,
.portrait-grid {
  display: grid;
  gap: var(--space-m);
}

.home-opening__principles {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: var(--space-l);
}

.content-grid,
.dual-column,
.artifact-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.home-feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.portrait-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-l);
}

.image-strip {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.room-band {
  padding: clamp(1.25rem, 2.5vw, 2rem);
  border: var(--frame);
  box-shadow: var(--shadow-strong);
  background: color-mix(in srgb, var(--paper-soft) 82%, white);
}

.room-band--golden {
  background: color-mix(in srgb, var(--yellow) 14%, var(--paper-soft));
}

.room-band--marvel {
  background: color-mix(in srgb, var(--red) 8%, var(--paper-soft));
}

.room-band--cinematic {
  background: color-mix(in srgb, var(--blue) 10%, var(--paper-soft));
}

.room-band__header {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-s);
}

.room-band__hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(18rem, 0.95fr);
  gap: var(--space-m);
  align-items: start;
}

.room-band__copy {
  display: grid;
  gap: var(--space-m);
}

.room-band__object {
  margin: 0;
}

.room-band__object img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.bauhaus-block,
.content-card,
.editorial-aside,
.quote-block,
.transition-block {
  padding: var(--space-m);
}

.bauhaus-block {
  min-height: 14rem;
}

.bauhaus-block--red { background: var(--red); color: white; }
.bauhaus-block--yellow { background: var(--yellow); }
.bauhaus-block--blue { background: var(--blue); color: white; }

.bauhaus-block strong {
  display: block;
  margin: var(--space-s) 0;
  font-size: 1.7rem;
  text-transform: uppercase;
}

.section-heading {
  display: grid;
  gap: 0.3rem;
  align-content: start;
}

.section-heading__title {
  font-size: clamp(1.55rem, 3.5vw, 2.7rem);
  max-width: 16ch;
}

.content-card {
  background: var(--paper-soft);
  display: grid;
  gap: 0.75rem;
  align-content: start;
  min-height: 100%;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.content-card:hover,
.artifact-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 var(--line);
}

.artifact-card {
  background: var(--paper-soft);
  display: grid;
  gap: 0.75rem;
  padding: var(--space-m);
  border: var(--frame);
  box-shadow: var(--shadow-strong);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.artifact-card img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.artifact-card img,
.artifact-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--frame);
  background: #fff;
}

.artifact-card__label,
.artifact-figure figcaption {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.artifact-card__title {
  margin: 0;
  font-size: 1.2rem;
  text-transform: uppercase;
}

.artifact-figure {
  margin: 0;
  display: grid;
  gap: var(--space-s);
  align-content: start;
}

.artifact-figure figcaption {
  max-width: 52ch;
  margin: 0;
}

.artifact-figure--wide {
  grid-column: 1 / -1;
}

.artifact-grid--stacked {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.artifact-grid--quad {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.highlight-mosaic {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr) minmax(0, 0.8fr);
  gap: var(--space-m);
}

.highlight-mosaic .artifact-figure {
  padding: var(--space-s);
  border: var(--frame);
  background: var(--paper-soft);
  box-shadow: var(--shadow-strong);
}

.artifact-figure--feature-panel {
  grid-row: span 2;
}

.highlight-mosaic .artifact-figure img {
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.highlight-mosaic .artifact-figure--feature-panel img {
  aspect-ratio: 4 / 6;
}

.content-card__title,
.editorial-aside__title {
  margin: 0;
  font-size: 1.25rem;
  text-transform: uppercase;
  line-height: 1.18;
  text-wrap: balance;
  overflow-wrap: anywhere;
}

.chapter-section__body,
.content-card__description,
.content-card__footer,
.opening-note__body,
.signpost-card__body,
.floating-card__body,
.hero-card__lede,
.site-footer__copy,
.transition-block__copy,
.editorial-aside__body {
  overflow-wrap: anywhere;
}

.content-card__footer {
  margin-top: auto;
  padding-top: 0.85rem;
  border-top: 1px solid rgba(17, 17, 17, 0.16);
}

.editorial-aside {
  background: var(--paper-strong);
}

.quote-block {
  margin: 0;
  border-left: 1rem solid var(--chapter-accent, var(--red));
  background: white;
}

.transition-block {
  background: var(--ink);
  color: white;
  display: grid;
  gap: var(--space-s);
  align-items: start;
}

.transition-block__copy {
  color: rgba(255, 255, 255, 0.85);
}

.transition-block .button-link--dark {
  color: white;
}

.site-footer {
  margin-bottom: 1rem;
  align-items: flex-start;
  background: var(--paper-soft);
}

.site-footer__links {
  max-width: 24rem;
  justify-content: flex-end;
}

.note-list {
  padding-left: 1.2rem;
  margin: 0;
}

.gallery-wall {
  display: grid;
  gap: var(--space-l);
}

.gallery-wall.artifact-grid {
  gap: var(--space-l);
}

.gallery-wall .artifact-figure {
  padding: var(--space-s);
  border: var(--frame);
  background: color-mix(in srgb, var(--paper-soft) 88%, white);
  box-shadow: var(--shadow-strong);
}

.gallery-wall .artifact-figure img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.gallery-wall .artifact-figure--wide img {
  aspect-ratio: 16 / 9;
}

.gallery-wall .artifact-figure figcaption {
  padding-top: 0.7rem;
  border-top: 1px solid rgba(17, 17, 17, 0.16);
}

.portrait-grid .artifact-figure figcaption,
.gallery-wall .artifact-figure figcaption,
.highlight-mosaic .artifact-figure figcaption {
  max-width: none;
}

.chapter-hero > div,
.chapter-hero__support > *,
.site-nav > *,
.site-footer__links > * {
  min-width: 0;
}

.hero-page {
  position: relative;
  min-height: 100vh;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  overflow: hidden;
}

.hero-page::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(8, 11, 18, 0.84), rgba(8, 11, 18, 0.56)),
    linear-gradient(90deg, transparent 0 14%, rgba(255, 255, 255, 0.08) 14% 14.35%, transparent 14.35% 100%),
    url("media/Captain America Comics 013 (Timely, 1942) (c2c) (Mark Bowen scans & edits)_0000.jpg") left 3% center / 27% auto no-repeat,
    url("media/All-Winners Comics 001 (Timely) (1941) (c2c) (Mark Bowen)_0000.jpg") center 18% / 28% auto no-repeat,
    url("media/Complete Comics vol 01 02 (scans) (c2c) (1944) (color touched up)_0000.jpg") right 3% center / 27% auto no-repeat,
    radial-gradient(circle at 50% 42%, rgba(61, 79, 182, 0.18), transparent 34%),
    linear-gradient(180deg, #040814 0%, #081223 42%, #05060d 100%);
  filter: saturate(0.82) contrast(1.02);
  transform: scale(1.02);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: left;
  width: min(100%, 40rem);
}

.hero-card {
  background: rgba(244, 239, 226, 0.94);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border: var(--frame);
  box-shadow: var(--shadow-strong);
  max-width: 34rem;
  width: 100%;
}

.hero-card__eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--red);
}

.hero-card h1 {
  margin: 0;
  font-size: clamp(2.3rem, 5vw, 4rem);
  line-height: 1;
  text-transform: uppercase;
  max-width: 9ch;
  text-wrap: balance;
  overflow-wrap: anywhere;
}

.hero-card__lede {
  margin: 1rem 0 0;
  max-width: 34ch;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--muted);
}

.hero-card__note {
  margin: 1rem 0 0;
  color: var(--ink);
}

.hero-card .author {
  font-size: 1rem;
  margin: 0.85rem 0 var(--space-l);
  color: var(--muted);
}

.hero-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.hero-card .btn {
  display: inline-block;
  background-color: var(--red);
  color: var(--paper);
  padding: var(--space-s) var(--space-l);
  text-decoration: none;
  font-weight: bold;
  border: var(--frame);
  box-shadow: var(--shadow-soft);
  transition: all 0.2s ease-in-out;
}

.hero-card .btn--secondary {
  background: transparent;
  color: var(--ink);
}

.hero-card .btn:hover {
  background-color: var(--ink);
  color: var(--paper);
  transform: translate(4px, 4px);
  box-shadow: 0 0 0 var(--line);
}

@media (max-width: 1080px) {
  .home-opening__intro--immersive,
  .route-band,
  .room-band__hero,
  .chapter-hero {
    grid-template-columns: 1fr;
  }

  .home-feature-grid,
  .portrait-grid,
  .artifact-grid--quad {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .home-opening__stage {
    min-height: 32rem;
    padding-top: 0.75rem;
  }

  .floating-card {
    width: min(13rem, 42%);
    max-width: 13rem;
  }

  .floating-card--top {
    position: absolute;
    top: 1.2rem;
    right: 0.15rem;
    transform: translateX(-6.5rem) rotate(-2deg);
  }

  .feature-object--primary {
    width: min(100%, 24rem);
    transform: rotate(-0.8deg);
  }

  .site-header {
    position: static;
  }
}

@media (max-width: 780px) {
  .hero-page::before {
    background:
      linear-gradient(135deg, rgba(8, 11, 18, 0.86), rgba(8, 11, 18, 0.6)),
      url("media/Captain America Comics 013 (Timely, 1942) (c2c) (Mark Bowen scans & edits)_0000.jpg") left -8% top 58% / 44% auto no-repeat,
      url("media/All-Winners Comics 001 (Timely) (1941) (c2c) (Mark Bowen)_0000.jpg") center top 20% / 41% auto no-repeat,
      url("media/Captain America Comics 016 (Timely) (1942) (c2c, missing centerfold recreated) (Mark Bowen)_0000.jpg") right -8% top 58% / 44% auto no-repeat,
      radial-gradient(circle at 50% 46%, rgba(61, 79, 182, 0.18), transparent 34%),
      linear-gradient(180deg, #040814 0%, #081223 42%, #05060d 100%);
  }

  .hero-card h1 {
    font-size: 2rem;
  }

  .hero-card {
    padding: 1.35rem;
  }

  .site-main {
    padding-top: var(--space-m);
  }
}

@media (max-width: 900px) {
  .home-opening__intro,
  .home-opening__intro--immersive,
  .opening-signposts,
  .route-band,
  .room-band__hero,
  .chapter-hero,
  .home-opening__principles,
  .home-feature-grid,
  .content-grid,
  .dual-column,
  .artifact-grid,
  .artifact-grid--stacked,
  .artifact-grid--quad,
  .image-strip,
  .highlight-mosaic,
  .portrait-grid {
    grid-template-columns: 1fr;
  }

  .home-opening__stage {
    position: relative;
    min-height: 28rem;
    gap: 1rem;
    padding-top: 0.6rem;
    padding-bottom: 0.6rem;
  }

  .home-opening__stage .floating-card {
    position: absolute;
    width: min(11.5rem, 46%);
    max-width: 11.5rem;
    z-index: 2;
  }

  .home-opening__stage .floating-card--top {
    position: absolute;
    top: 0.65rem;
    right: 0;
    transform: translateX(-5.5rem) rotate(-1.5deg);
  }

  .feature-object--primary {
    width: min(82vw, 22rem);
    transform: rotate(-0.6deg);
  }

  .room-band__header {
    align-items: start;
  }

  .site-header__inner,
  .site-header__subnav,
  .site-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .site-directory {
    justify-items: stretch;
  }

  .site-nav--rooms {
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 0.45rem 0.45rem 0.8rem;
    margin-inline: 0;
    scrollbar-width: thin;
    scroll-snap-type: x proximity;
  }

  .room-tab {
    flex: 0 0 auto;
    min-width: 9.75rem;
    scroll-snap-align: start;
  }

  .site-header__subnav {
    padding: 0.7rem 0.75rem 0.85rem;
  }

  .site-header {
    position: static;
  }

  .portrait-grid,
  .home-feature-grid,
  .artifact-grid--quad {
    grid-template-columns: 1fr;
  }

  .display-title,
  .site-brand__title,
  .chapter-hero__title,
  .home-opening__title,
  .section-heading__title,
  .site-footer__title,
  .transition-block__title {
    max-width: none;
  }
}

/* ==========================================================
   SCROLLYTELLING ENHANCEMENTS
   ========================================================== */

body {
  overflow-x: hidden;
}

/* ── Progress bar ── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--chapter-accent, var(--red));
  z-index: 200;
  transition: width 0.08s linear;
  pointer-events: none;
}

/* ── Slide counter ── */
.slide-counter {
  position: fixed;
  bottom: 1.75rem;
  right: 1.5rem;
  z-index: 50;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--paper-soft);
  border: var(--frame);
  padding: 0.32rem 0.6rem;
  box-shadow: var(--shadow-soft);
  pointer-events: none;
}

/* ── Scroll arrow cue ── */
.scroll-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.68;
  cursor: default;
  user-select: none;
}

.scroll-arrow__chevron {
  width: 1.3rem;
  height: 1.3rem;
  border-right: 2.5px solid currentColor;
  border-bottom: 2.5px solid currentColor;
  transform: rotate(45deg);
  animation: scrollBounce 2.1s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50%       { transform: rotate(45deg) translateY(8px); }
}

/* ── Full-bleed immersive chapter hero ── */
.chapter-hero--immersive {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  color: white;
  /* pull out of site-main width constraint */
  width: 100vw;
  margin-left: calc(50% - 50vw);
}

.chapter-hero--immersive::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--hero-bg-image);
  background-size: cover;
  background-position: center 30%;
  filter: saturate(0.62) contrast(1.06);
  transform: scale(1.06);
  transition: transform 14s ease-out;
  z-index: 0;
}

.chapter-hero--immersive-loaded::before {
  transform: scale(1.0);
}

.chapter-hero--immersive::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    140deg,
    rgba(6, 9, 16, 0.88) 0%,
    rgba(6, 9, 16, 0.58) 55%,
    rgba(6, 9, 16, 0.34) 100%
  );
  z-index: 0;
}

.chapter-hero--immersive > * {
  position: relative;
  z-index: 1;
}

/* constrained content wrapper inside the full-bleed hero */
.chapter-hero-inner {
  width: min(calc(100% - 2rem), var(--max-width));
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(18rem, 0.85fr);
  gap: var(--space-xl);
  align-items: center;
  padding: clamp(2.5rem, 5vw, 4.5rem) var(--space-m);
}

.chapter-hero-inner > * {
  min-width: 0;
}

/* text overrides inside immersive */
.chapter-hero--immersive .section-heading__eyebrow {
  color: var(--yellow);
  opacity: 1;
}

.chapter-hero--immersive .chapter-hero__title {
  color: white;
  font-size: clamp(3rem, 7vw, 6rem);
  max-width: 10ch;
}

.chapter-hero--immersive .chapter-hero__period {
  color: rgba(255, 255, 255, 0.52);
}

.chapter-hero--immersive .chapter-hero__lede,
.chapter-hero--immersive .copy {
  color: rgba(255, 255, 255, 0.82);
}

.chapter-hero--immersive .button-link {
  background: rgba(244, 239, 226, 0.92);
  color: var(--ink);
}

.chapter-hero--immersive .button-link--dark {
  background: var(--ink);
  color: white;
}

/* scroll arrow anchored to bottom of immersive hero */
.chapter-hero--immersive .scroll-arrow {
  color: rgba(255, 255, 255, 0.55);
  position: absolute;
  bottom: 2.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

/* ── Dark evidence slide ── */
.slide--dark {
  background: var(--ink);
  color: white;
  border-color: rgba(255, 255, 255, 0.12);
  padding: clamp(1.5rem, 3vw, 2.5rem);
}

.slide--dark .section-heading__title,
.slide--dark h2,
.slide--dark h3 {
  color: white;
}

.slide--dark .section-heading__eyebrow,
.slide--dark .kicker {
  color: var(--yellow);
}

.slide--dark .copy,
.slide--dark .chapter-section__body,
.slide--dark .content-card__description,
.slide--dark .content-card__footer,
.slide--dark .content-card__meta {
  color: rgba(255, 255, 255, 0.7);
}

.slide--dark .content-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1.5px solid rgba(255, 255, 255, 0.14);
  box-shadow: none;
}

.slide--dark .content-card:hover {
  background: rgba(255, 255, 255, 0.11);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 rgba(255, 255, 255, 0.14);
}

.slide--dark .content-card__title {
  color: white;
}

.slide--dark .quote-block {
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.82);
  border-left-color: var(--chapter-accent, var(--yellow));
}

/* ── Fullscreen opening on home page ── */
.home-opening--fullscreen {
  min-height: calc(100svh - 9rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-bottom: 3.5rem;
  position: relative;
}

.home-opening--fullscreen .scroll-arrow {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--muted);
}

/* ── Minimal header on scroll ── */
.site-header--minimal .site-header__subnav {
  max-height: 0;
  overflow: hidden;
  padding-top: 0;
  padding-bottom: 0;
  border-top-width: 0;
  transition: max-height 0.35s ease, padding 0.35s ease, border 0.35s ease;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .chapter-hero-inner {
    grid-template-columns: 1fr;
    padding-top: 5rem;
  }

  .slide-counter {
    display: none;
  }
}