:root {
  --bg: #070910;
  --bg-deep: #02040a;
  --text: #f8f1df;
  --muted: #b7a98d;
  --gold: #f2c66d;
  --gold-soft: #d6a853;
  --accent: #f7c873;
  --line: rgba(242, 198, 109, 0.32);
  --line-strong: rgba(242, 198, 109, 0.58);
  --page: #15110d;
  --page-dark: #0b0d12;
  --page-warm: #211811;
  --surface: rgba(11, 13, 18, 0.78);
  --surface-strong: rgba(22, 18, 14, 0.92);
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.58);
  --shadow-gold: 0 0 42px rgba(247, 200, 115, 0.18);
  --radius: 8px;
  --max-width: 1440px;
  --nav-height: 72px;
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 18% 16%, rgba(91, 76, 151, 0.18), transparent 30rem),
    radial-gradient(circle at 78% 8%, rgba(247, 200, 115, 0.16), transparent 24rem),
    radial-gradient(circle at 62% 78%, rgba(72, 178, 214, 0.14), transparent 26rem),
    linear-gradient(180deg, var(--bg-deep), var(--bg) 42%, #04050a);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  content: "";
  background:
    radial-gradient(circle, rgba(255, 255, 255, 0.78) 0 1px, transparent 1.4px) 0 0 / 53px 53px,
    radial-gradient(circle, rgba(247, 200, 115, 0.58) 0 1px, transparent 1.6px) 17px 21px / 101px 101px,
    radial-gradient(circle, rgba(143, 216, 255, 0.44) 0 1px, transparent 1.6px) 29px 9px / 151px 151px;
  opacity: 0.22;
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.86) 56%, transparent 100%);
}

body::after {
  position: fixed;
  inset: auto -12vw -24vh;
  z-index: -1;
  height: 58vh;
  pointer-events: none;
  content: "";
  background:
    radial-gradient(ellipse at 18% 50%, rgba(247, 200, 115, 0.17), transparent 44%),
    radial-gradient(ellipse at 74% 44%, rgba(142, 216, 255, 0.12), transparent 46%);
  filter: blur(18px);
}

body[data-page="index"] {
  scroll-snap-type: y proximity;
}

img,
svg {
  display: block;
  max-width: 100%;
}

figure {
  margin: 0;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  color: inherit;
}

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

p,
h1,
h2,
h3 {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--page-dark);
  color: var(--gold);
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--nav-height);
  padding: 14px clamp(18px, 4vw, 56px);
  background: linear-gradient(180deg, rgba(2, 4, 10, 0.9), rgba(2, 4, 10, 0.56), transparent);
  backdrop-filter: blur(10px);
}

.site-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  color: var(--gold);
  font-family: Georgia, Cambria, "Times New Roman", serif;
  font-size: clamp(0.88rem, 1vw, 1rem);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.mark-sigil,
.commission-sigil,
.compass-mark {
  position: relative;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
}

.mark-sigil {
  width: 28px;
  height: 28px;
}

.mark-sigil::before,
.mark-sigil::after,
.commission-sigil::before,
.commission-sigil::after,
.compass-mark::before,
.compass-mark::after {
  position: absolute;
  content: "";
  background: var(--gold);
}

.mark-sigil::before {
  width: 16px;
  height: 1px;
}

.mark-sigil::after {
  width: 1px;
  height: 16px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1vw, 18px);
}

.site-nav a {
  min-height: 44px;
  padding: 12px 10px;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 180ms ease, text-shadow 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--gold);
  text-shadow: 0 0 18px rgba(247, 200, 115, 0.28);
}

.atlas-main {
  position: relative;
  z-index: 1;
}

.snap-section {
  scroll-snap-align: start;
  min-height: 100svh;
}

.cover-section {
  display: grid;
  place-items: center;
  min-height: 100svh;
  padding: calc(var(--nav-height) + 20px) 22px 40px;
}

.cover-stage {
  width: min(100%, 1160px);
  display: grid;
  place-items: center;
  perspective: 1400px;
}

.book-cover {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: min(88vw, 560px);
  min-height: clamp(560px, 76svh, 780px);
  padding: clamp(34px, 6vw, 72px);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    linear-gradient(rgba(7, 9, 16, 0.62), rgba(7, 9, 16, 0.92)),
    radial-gradient(circle at 50% 82%, rgba(247, 200, 115, 0.24), transparent 23%),
    radial-gradient(circle at 50% 10%, rgba(143, 216, 255, 0.12), transparent 34%),
    linear-gradient(150deg, #11141c, #070910 46%, #19110b);
  box-shadow: var(--shadow), inset 0 0 0 10px rgba(242, 198, 109, 0.04), inset 0 0 0 1px rgba(255, 255, 255, 0.06);
  text-align: center;
  transform: rotateX(1.5deg);
}

.book-cover::before,
.book-cover::after,
.cover-ornament::before,
.cover-ornament::after {
  position: absolute;
  pointer-events: none;
  content: "";
}

.book-cover::before {
  inset: 20px;
  border: 1px solid var(--line);
}

.book-cover::after {
  inset: 31px;
  border: 1px solid rgba(242, 198, 109, 0.12);
  background:
    linear-gradient(90deg, transparent, rgba(247, 200, 115, 0.38), transparent) top / 54% 1px no-repeat,
    linear-gradient(90deg, transparent, rgba(247, 200, 115, 0.38), transparent) bottom / 54% 1px no-repeat;
}

.cover-ornament {
  position: absolute;
  inset: 40px;
  border: 1px solid rgba(242, 198, 109, 0.13);
}

.cover-ornament::before,
.cover-ornament::after {
  inset: -4px auto auto 50%;
  width: 9px;
  height: 9px;
  border: 1px solid var(--line-strong);
  background: var(--page-dark);
  transform: translateX(-50%) rotate(45deg);
}

.cover-ornament::after {
  inset: auto auto -4px 50%;
}

.eyebrow,
.section-kicker,
.chapter-eyebrow,
.status-pill {
  color: var(--gold);
  font-size: clamp(0.68rem, 0.9vw, 0.78rem);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.book-cover .eyebrow {
  margin-bottom: 24px;
}

h1,
h2 {
  color: var(--gold);
  font-family: Georgia, Cambria, "Times New Roman", serif;
  font-weight: 500;
  line-height: 0.98;
  text-transform: uppercase;
}

h1 {
  max-width: 11ch;
  font-size: clamp(3.2rem, 8vw, 6.8rem);
}

h2 {
  font-size: clamp(2.4rem, 5vw, 5rem);
}

h3 {
  color: var(--text);
  font-family: Georgia, Cambria, "Times New Roman", serif;
  font-size: clamp(1.2rem, 2vw, 1.7rem);
  font-weight: 500;
}

.cover-subtitle {
  max-width: 34rem;
  margin-top: 26px;
  color: var(--text);
  font-size: clamp(1rem, 1.4vw, 1.2rem);
}

.cover-attribution {
  margin-top: 22px;
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.compass-mark {
  width: clamp(94px, 14vw, 144px);
  height: clamp(94px, 14vw, 144px);
  margin-top: 44px;
  box-shadow: 0 0 40px rgba(247, 200, 115, 0.13);
}

.compass-mark::before {
  width: 76%;
  height: 1px;
}

.compass-mark::after {
  width: 1px;
  height: 76%;
}

.compass-mark span {
  display: none;
}

.cover-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 150px;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, var(--gold), #fff0ba);
  color: #171006;
  box-shadow: var(--shadow-gold);
}

.button-secondary {
  background: rgba(247, 200, 115, 0.05);
  color: var(--gold);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: rgba(247, 200, 115, 0.12);
}

.atlas-section {
  display: grid;
  align-items: center;
  padding: calc(var(--nav-height) + 44px) clamp(18px, 5vw, 72px) 56px;
}

.section-shell {
  width: min(100%, var(--max-width));
  margin: 0 auto;
}

.compact-shell {
  width: min(100%, 1180px);
}

.section-shell > h2 {
  margin-top: 12px;
}

.section-intro {
  max-width: 760px;
  margin-top: 18px;
  color: var(--muted);
  font-size: clamp(1rem, 1.35vw, 1.15rem);
}

.loading-line,
.error-note {
  min-height: 48px;
  color: var(--muted);
}

.toc-book {
  position: relative;
  margin-top: clamp(28px, 4vw, 54px);
  padding: clamp(14px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.05), transparent 16%, transparent 84%, rgba(255, 255, 255, 0.05)),
    linear-gradient(135deg, rgba(21, 17, 13, 0.95), rgba(7, 9, 16, 0.94));
  box-shadow: var(--shadow);
}

.toc-book::before {
  position: absolute;
  inset: 12px;
  pointer-events: none;
  border: 1px solid rgba(242, 198, 109, 0.13);
  content: "";
}

.toc-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
}

.toc-entry {
  position: relative;
  display: grid;
  grid-template-columns: minmax(92px, 180px) 1fr auto;
  gap: clamp(14px, 2vw, 24px);
  align-items: center;
  min-height: 128px;
  padding: clamp(12px, 2vw, 18px);
  border: 1px solid rgba(242, 198, 109, 0.16);
  border-radius: var(--radius);
  background: rgba(2, 4, 10, 0.34);
  transition: border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

a.toc-entry:hover {
  border-color: var(--line-strong);
  background: rgba(247, 200, 115, 0.06);
  transform: translateX(4px);
}

.toc-entry.is-locked {
  color: rgba(248, 241, 223, 0.48);
}

.toc-entry.is-locked::after {
  position: absolute;
  right: 16px;
  bottom: 10px;
  color: var(--muted);
  content: "Locked";
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.toc-thumb,
.plate-media,
.hero-image-frame,
.thumb-image-frame,
.gallery-image-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(242, 198, 109, 0.24);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 30% 20%, rgba(247, 200, 115, 0.18), transparent 36%),
    radial-gradient(circle at 72% 72%, rgba(143, 216, 255, 0.12), transparent 40%),
    linear-gradient(135deg, #11141c, #080a10);
}

.toc-thumb {
  aspect-ratio: 16 / 10;
}

.toc-thumb img,
.plate-media img,
.hero-image-frame img,
.thumb-image-frame img,
.gallery-image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.toc-copy {
  display: grid;
  gap: 5px;
}

.toc-copy strong {
  color: var(--gold);
  font-family: Georgia, Cambria, "Times New Roman", serif;
  font-size: clamp(1.2rem, 2.2vw, 2rem);
  font-weight: 500;
}

.toc-copy span {
  color: var(--muted);
}

.toc-number {
  color: var(--gold);
  font-family: Georgia, Cambria, "Times New Roman", serif;
  font-size: clamp(1.5rem, 3vw, 2.8rem);
}

.status-pill {
  display: inline-flex;
  width: fit-content;
  min-height: 28px;
  align-items: center;
  padding: 4px 9px;
  border: 1px solid rgba(242, 198, 109, 0.24);
  border-radius: 999px;
  background: rgba(247, 200, 115, 0.07);
}

.missing-image {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  color: var(--muted);
  text-align: center;
  background:
    linear-gradient(45deg, rgba(242, 198, 109, 0.08) 25%, transparent 25% 50%, rgba(242, 198, 109, 0.08) 50% 75%, transparent 75%) 0 0 / 22px 22px,
    linear-gradient(135deg, rgba(7, 9, 16, 0.95), rgba(21, 17, 13, 0.95));
}

.missing-image span {
  display: block;
  max-width: 22ch;
  color: var(--gold);
  font-family: Georgia, Cambria, "Times New Roman", serif;
  font-size: clamp(0.95rem, 1.4vw, 1.2rem);
  line-height: 1.3;
}

.image-is-missing img {
  opacity: 0;
}

.featured-plates {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(28px, 4vw, 54px);
}

.world-plate {
  position: relative;
  display: grid;
  grid-template-rows: minmax(300px, 54svh) auto;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(7, 9, 16, 0.64);
  box-shadow: var(--shadow);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.world-plate:hover,
.world-plate:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 72%, white 0%);
  box-shadow: var(--shadow), 0 0 44px color-mix(in srgb, var(--accent) 18%, transparent);
  transform: translateY(-4px);
}

.world-plate .plate-media {
  border-width: 0;
  border-radius: 0;
}

.plate-copy {
  display: grid;
  gap: 14px;
  padding: clamp(18px, 3vw, 30px);
  border-top: 1px solid rgba(242, 198, 109, 0.2);
}

.plate-copy p {
  color: var(--muted);
}

.dna-preview,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.dna-preview span,
.tag-list span,
.use-list li {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 10px;
  border: 1px solid rgba(242, 198, 109, 0.17);
  border-radius: 999px;
  background: rgba(247, 200, 115, 0.06);
  color: var(--muted);
  font-size: 0.82rem;
}

.usage-steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(30px, 4vw, 54px);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.usage-steps article {
  display: grid;
  align-content: start;
  gap: 12px;
  min-height: 250px;
  padding: clamp(18px, 2.4vw, 28px);
  background: rgba(7, 9, 16, 0.88);
}

.usage-steps span {
  color: var(--gold);
  font-family: Georgia, Cambria, "Times New Roman", serif;
  font-size: 1.6rem;
}

.usage-steps p {
  color: var(--muted);
}

.commission-section {
  text-align: center;
}

.final-shell {
  display: grid;
  justify-items: center;
  gap: 20px;
  width: min(100%, 880px);
  padding: clamp(30px, 6vw, 76px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 50% 28%, rgba(247, 200, 115, 0.16), transparent 30%),
    linear-gradient(135deg, rgba(21, 17, 13, 0.9), rgba(7, 9, 16, 0.94));
  box-shadow: var(--shadow);
}

.final-shell p {
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.2rem);
}

.commission-sigil {
  width: 104px;
  height: 104px;
  color: var(--gold);
}

.commission-sigil::before {
  width: 72%;
  height: 1px;
}

.commission-sigil::after {
  width: 1px;
  height: 72%;
}

.section-progress {
  position: fixed;
  top: 50%;
  right: 18px;
  z-index: 30;
  display: grid;
  gap: 10px;
  transform: translateY(-50%);
}

.section-progress button {
  width: 12px;
  height: 12px;
  min-height: 12px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: rgba(247, 200, 115, 0.1);
  cursor: pointer;
}

.section-progress button[aria-current="true"] {
  background: var(--gold);
  box-shadow: 0 0 18px rgba(247, 200, 115, 0.46);
}

.chapter-main {
  min-height: 100svh;
}

.chapter-opening {
  position: relative;
  display: grid;
  align-items: center;
  min-height: 100svh;
  padding: calc(var(--nav-height) + 36px) clamp(14px, 4vw, 52px) 42px;
}

.chapter-spread {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  width: min(100%, 1560px);
  min-height: min(760px, calc(100svh - 150px));
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.04), transparent 7%, transparent 93%, rgba(255, 255, 255, 0.04)),
    linear-gradient(110deg, rgba(31, 22, 15, 0.97), rgba(7, 9, 16, 0.98));
  box-shadow: var(--shadow), 0 0 62px color-mix(in srgb, var(--accent) 16%, transparent);
}

.chapter-spread::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  z-index: 2;
  width: 22px;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.35), rgba(255, 255, 255, 0.07), rgba(0, 0, 0, 0.36));
  transform: translateX(-50%);
}

.book-page {
  position: relative;
  min-width: 0;
  padding: clamp(16px, 2.2vw, 30px);
}

.book-page::before {
  position: absolute;
  inset: 14px;
  pointer-events: none;
  border: 1px solid rgba(242, 198, 109, 0.12);
  content: "";
}

.image-page {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 16px;
  border-right: 1px solid rgba(242, 198, 109, 0.18);
}

.hero-image-frame {
  min-height: 0;
  aspect-ratio: 4 / 5;
  border-color: rgba(242, 198, 109, 0.32);
}

.hero-image-frame img {
  transition: opacity 220ms ease, transform 450ms ease;
}

.hero-image-frame:hover img {
  transform: scale(1.015);
}

.thumbnail-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.thumb-button {
  position: relative;
  min-height: 72px;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(242, 198, 109, 0.22);
  border-radius: var(--radius);
  background: #080a10;
  cursor: pointer;
}

.thumb-image-frame {
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: 0;
}

.thumb-button img {
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  opacity: 0.74;
  transition: opacity 180ms ease, transform 180ms ease;
}

.thumb-button:hover img,
.thumb-button[aria-pressed="true"] img {
  opacity: 1;
}

.thumb-button[aria-pressed="true"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 18%, transparent);
}

.thumb-button .missing-image {
  font-size: 0.68rem;
}

.text-page {
  display: flex;
  min-height: 0;
  flex-direction: column;
}

.chapter-scroll {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 22px;
  max-height: calc(100svh - 210px);
  overflow-y: auto;
  padding: 4px clamp(4px, 0.8vw, 10px) 4px 4px;
  scrollbar-color: var(--line-strong) transparent;
}

.chapter-title-group {
  display: grid;
  gap: 14px;
  text-align: center;
}

.chapter-title-group h1 {
  max-width: none;
  color: var(--accent);
  font-size: clamp(2.3rem, 4.3vw, 5.2rem);
}

.chapter-title-group p {
  color: var(--muted);
  font-size: clamp(1rem, 1.3vw, 1.15rem);
}

.chapter-meta {
  display: grid;
  gap: 10px;
  padding: 14px 0;
  border-top: 1px solid rgba(242, 198, 109, 0.16);
  border-bottom: 1px solid rgba(242, 198, 109, 0.16);
}

.chapter-meta div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 10px;
}

.chapter-meta dt {
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.chapter-meta dd {
  margin: 0;
  color: var(--muted);
}

.lore-block {
  display: grid;
  gap: 14px;
  color: var(--text);
}

.lore-block p {
  color: rgba(248, 241, 223, 0.84);
}

.content-group {
  display: grid;
  gap: 12px;
}

.content-group h2,
.content-group h3 {
  color: var(--gold);
  font-family: Georgia, Cambria, "Times New Roman", serif;
  font-size: clamp(1.35rem, 2vw, 2rem);
  line-height: 1.1;
  text-transform: uppercase;
}

.prompt-list {
  display: grid;
  gap: 12px;
}

.prompt-card {
  display: grid;
  gap: 12px;
  padding: 14px;
  border: 1px solid rgba(242, 198, 109, 0.18);
  border-radius: var(--radius);
  background: rgba(2, 4, 10, 0.34);
}

.prompt-card h3 {
  color: var(--accent);
  font-size: 1.05rem;
}

.prompt-card p {
  color: rgba(248, 241, 223, 0.84);
}

.copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.copy-button {
  min-height: 44px;
  padding: 9px 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(247, 200, 115, 0.08);
  color: var(--gold);
  cursor: pointer;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: background 180ms ease, transform 180ms ease;
}

.copy-button:hover {
  background: rgba(247, 200, 115, 0.16);
  transform: translateY(-1px);
}

.copy-button.is-copied {
  background: color-mix(in srgb, var(--accent) 24%, rgba(247, 200, 115, 0.08));
  color: #fff8df;
}

.copy-status {
  min-height: 24px;
  color: var(--muted);
  font-size: 0.86rem;
}

.page-turn {
  position: fixed;
  top: 50%;
  z-index: 5;
  display: inline-grid;
  place-items: center;
  width: 52px;
  height: 68px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(2, 4, 10, 0.74);
  color: var(--gold);
  font-family: Georgia, Cambria, "Times New Roman", serif;
  font-size: 2.2rem;
  box-shadow: var(--shadow);
  transform: translateY(-50%);
  transition: background 180ms ease, transform 180ms ease;
}

.page-turn:hover,
.page-turn:focus-visible {
  background: rgba(247, 200, 115, 0.13);
  transform: translateY(-50%) scale(1.04);
}

.page-turn.prev {
  left: clamp(8px, 1vw, 18px);
}

.page-turn.next {
  right: clamp(8px, 1vw, 18px);
}

.page-turn[aria-disabled="true"] {
  pointer-events: none;
  opacity: 0.35;
}

.chapter-continuation {
  display: grid;
  gap: clamp(24px, 4vw, 50px);
  padding: 42px clamp(18px, 5vw, 72px) 76px;
}

.chapter-panel {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: clamp(18px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(7, 9, 16, 0.68);
  box-shadow: var(--shadow);
}

.chapter-panel > h2 {
  color: var(--accent);
  font-size: clamp(2rem, 4vw, 3.9rem);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.gallery-image-frame {
  aspect-ratio: 4 / 5;
}

.gallery-image-frame:nth-child(even) {
  aspect-ratio: 5 / 6;
}

.details-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-top: 22px;
}

.use-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chapter-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid rgba(242, 198, 109, 0.16);
}

.chapter-cta p {
  color: var(--muted);
}

.chapter-bottom-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.state-section {
  display: grid;
  min-height: 100svh;
  align-items: center;
  padding: calc(var(--nav-height) + 44px) 20px 44px;
}

.state-section h1 {
  max-width: 14ch;
  color: var(--accent);
  font-size: clamp(2.5rem, 7vw, 5.8rem);
}

.coming-soon-badge {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

@media (max-width: 1180px) {
  .usage-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .chapter-spread {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .chapter-spread::before {
    display: none;
  }

  .image-page {
    border-right: 0;
    border-bottom: 1px solid rgba(242, 198, 109, 0.18);
  }

  .hero-image-frame {
    aspect-ratio: 16 / 10;
  }

  .chapter-scroll {
    max-height: none;
    overflow: visible;
  }
}

@media (max-width: 900px) {
  body[data-page="index"] {
    scroll-snap-type: none;
  }

  .site-header {
    align-items: flex-start;
    gap: 8px;
    padding: 10px 14px;
  }

  .site-mark {
    max-width: 190px;
    font-size: 0.68rem;
  }

  .site-nav {
    justify-content: flex-end;
    gap: 2px;
  }

  .site-nav a {
    padding: 12px 6px;
    font-size: 0.66rem;
  }

  .book-cover {
    width: min(100%, calc(100vw - 28px));
    min-height: min(760px, calc(100svh - 38px));
    padding: 30px 24px;
  }

  .cover-actions {
    width: 100%;
  }

  .button {
    width: 100%;
  }

  .atlas-section {
    padding-right: 16px;
    padding-left: 16px;
  }

  .toc-entry {
    grid-template-columns: 112px 1fr;
  }

  .toc-number {
    grid-column: 1 / -1;
    justify-self: end;
    font-size: 1.2rem;
  }

  .featured-plates {
    grid-template-columns: 1fr;
  }

  .world-plate {
    grid-template-rows: minmax(260px, 48svh) auto;
  }

  .usage-steps {
    grid-template-columns: 1fr;
  }

  .usage-steps article {
    min-height: 0;
  }

  .section-progress {
    display: none;
  }

  .chapter-opening {
    padding: calc(var(--nav-height) + 34px) 12px 28px;
  }

  .book-page {
    padding: 14px;
  }

  .book-page::before {
    inset: 8px;
  }

  .thumbnail-rail {
    display: flex;
    overflow-x: auto;
    padding-bottom: 4px;
    scroll-snap-type: x proximity;
  }

  .thumb-button {
    flex: 0 0 116px;
    scroll-snap-align: start;
  }

  .chapter-title-group {
    text-align: left;
  }

  .chapter-meta div {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .page-turn {
    display: none;
    position: static;
    width: auto;
    min-width: 112px;
    height: 48px;
    font-size: 1.5rem;
    transform: none;
  }

  .page-turn:hover,
  .page-turn:focus-visible {
    transform: translateY(-1px);
  }

  .chapter-mobile-turns {
    display: flex;
    gap: 10px;
    justify-content: space-between;
    width: min(100%, 520px);
    margin: 14px auto 0;
  }

  .chapter-continuation {
    padding: 24px 12px 58px;
  }

  .gallery-grid {
    display: flex;
    overflow-x: auto;
    padding-bottom: 4px;
    scroll-snap-type: x proximity;
  }

  .gallery-image-frame {
    flex: 0 0 min(82vw, 340px);
    scroll-snap-align: start;
  }

  .details-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  :root {
    --nav-height: 76px;
  }

  .site-header {
    min-height: var(--nav-height);
  }

  .site-mark {
    max-width: 154px;
    gap: 8px;
    font-size: 0.6rem;
    line-height: 1.35;
  }

  .mark-sigil {
    flex: 0 0 28px;
  }

  .site-nav a {
    min-height: 40px;
    padding: 10px 3px;
    font-size: 0.58rem;
  }

  .site-nav a:nth-child(2),
  .site-nav a:nth-child(3) {
    display: none;
  }

  h1 {
    font-size: clamp(2.35rem, 10.5vw, 3.45rem);
  }

  .cover-subtitle {
    max-width: 28ch;
  }

  h2 {
    font-size: clamp(2.1rem, 12vw, 3.4rem);
  }

  .cover-section {
    padding-right: 12px;
    padding-left: 12px;
  }

  .cover-subtitle {
    font-size: 1rem;
  }

  .toc-entry {
    grid-template-columns: 92px 1fr;
    min-height: 112px;
    padding: 10px;
  }

  .toc-copy strong {
    font-size: 1.08rem;
  }

  .toc-copy span {
    font-size: 0.88rem;
  }

  .toc-entry.is-locked::after {
    right: 10px;
    bottom: 6px;
  }

  .final-shell {
    padding: 28px 18px;
  }

  .chapter-title-group h1 {
    font-size: clamp(2.1rem, 12vw, 3.2rem);
  }

  .prompt-card {
    padding: 12px;
  }

  .copy-row {
    align-items: stretch;
  }

  .copy-button {
    width: 100%;
  }

  .chapter-cta {
    align-items: stretch;
  }

  .chapter-bottom-nav,
  .chapter-cta .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }

  body[data-page="index"] {
    scroll-snap-type: none;
  }
}