:root {
  color-scheme: dark;
  --ink: #0b0b0b;
  --ink-soft: #141412;
  --surface: #1b1b18;
  --surface-raised: #24231f;
  --bone: #e9e2d0;
  --bone-dim: #c9c0aa;
  --bronze: #b78b45;
  --bronze-bright: #d1a864;
  --verdigris: #3e6b64;
  --verdigris-bright: #6f9d94;
  --ember: #8b3a2a;
  --line: rgba(233, 226, 208, 0.16);
  --line-strong: rgba(183, 139, 69, 0.5);
  --serif: "Bodoni 72", Didot, "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: "Avenir Next", Avenir, "Helvetica Neue", Helvetica, sans-serif;
  --mono: "SFMono-Regular", "Cascadia Mono", Menlo, Consolas, monospace;
  --max: 1280px;
  --rail: 122px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--ink);
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 14% 16%, rgba(62, 107, 100, 0.09), transparent 26rem),
    var(--ink);
  color: var(--bone);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  content: "";
  opacity: 0.22;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.10'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

::selection {
  background: var(--bronze);
  color: var(--ink);
}

a {
  color: inherit;
}

button,
input,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--bronze-bright);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  padding: 12px 18px;
  border-radius: 4px;
  background: var(--bone);
  color: var(--ink);
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

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

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 30px;
  border-bottom: 1px solid rgba(233, 226, 208, 0.1);
  background: linear-gradient(180deg, rgba(11, 11, 11, 0.94), rgba(11, 11, 11, 0.72));
  backdrop-filter: blur(18px) saturate(120%);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--bone);
  font-family: var(--serif);
  font-size: 1.03rem;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.wordmark-mark {
  width: 24px;
  height: 30px;
  border: 1px solid var(--bronze);
  border-bottom: 0;
  box-shadow: inset 5px 0 0 rgba(183, 139, 69, 0.12), inset -5px 0 0 rgba(62, 107, 100, 0.13);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.language-control {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
}

.language-control label {
  color: rgba(233, 226, 208, 0.62);
  font-size: 0.61rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.language-select-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.language-select-wrap::after {
  position: absolute;
  right: 8px;
  color: var(--bronze-bright);
  content: "⌄";
  font-size: 0.8rem;
  line-height: 1;
  pointer-events: none;
}

.language-control select {
  width: 116px;
  min-height: 34px;
  padding: 0 25px 0 9px;
  border: 1px solid rgba(183, 139, 69, 0.42);
  border-radius: 1px;
  appearance: none;
  background: rgba(11, 11, 11, 0.72);
  color: var(--bone);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.035em;
}

.language-control select:hover {
  border-color: var(--bronze-bright);
}

.text-button,
.sound-toggle {
  min-height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--bone-dim);
  cursor: pointer;
  font-size: 0.76rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.text-button {
  text-decoration: underline;
  text-decoration-color: rgba(183, 139, 69, 0.55);
  text-underline-offset: 5px;
}

.sound-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.sound-toggle > span:first-child {
  color: var(--bronze-bright);
  font-size: 1.4rem;
  line-height: 1;
}

.journey-rail {
  position: fixed;
  top: 72px;
  left: 0;
  bottom: 0;
  z-index: 40;
  display: flex;
  flex-direction: column;
  width: var(--rail);
  padding: 30px 18px 22px;
  border-right: 1px solid rgba(233, 226, 208, 0.1);
  background: rgba(11, 11, 11, 0.82);
  backdrop-filter: blur(14px);
}

.rail-label,
.rail-status {
  margin: 0;
  color: rgba(233, 226, 208, 0.48);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.journey-rail ol {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  margin: 22px 0;
  padding: 0;
  list-style: none;
}

.journey-rail a {
  display: grid;
  grid-template-columns: 26px 1fr;
  align-items: center;
  min-height: 44px;
  padding: 6px 4px;
  color: rgba(233, 226, 208, 0.48);
  text-decoration: none;
  transition: color 250ms ease, transform 250ms var(--ease);
}

.journey-rail a:hover,
.journey-rail a[aria-current="location"] {
  color: var(--bone);
  transform: translateX(3px);
}

.journey-rail a.viewed span {
  color: var(--bronze-bright);
}

.journey-rail a span {
  font-family: var(--mono);
  font-size: 0.64rem;
}

.journey-rail a em {
  overflow: hidden;
  font-size: 0.72rem;
  font-style: normal;
  letter-spacing: 0.03em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rail-progress {
  width: 100%;
  height: 1px;
  margin-bottom: 10px;
  background: rgba(233, 226, 208, 0.15);
}

.rail-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--bronze-bright);
  transition: width 500ms var(--ease);
}

main,
footer {
  margin-left: var(--rail);
}

.chapter {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  border-bottom: 1px solid rgba(233, 226, 208, 0.12);
  isolation: isolate;
}

.chapter-inner {
  position: relative;
  z-index: 3;
  width: min(calc(100% - 80px), var(--max));
  margin: 0 auto;
  padding: 150px 0 130px;
}

.hero {
  display: flex;
  align-items: flex-end;
  min-height: 100svh;
  background: var(--ink);
}

.hero-video,
.image-scrim,
.section-image,
.code-backdrop,
.emanation-image,
.lexicon-image,
.archive-image,
.archive-scrim {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-video {
  object-fit: cover;
  opacity: 0.76;
  filter: saturate(0.78) contrast(1.05);
}

.image-scrim {
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(11, 11, 11, 0.68), rgba(11, 11, 11, 0.08) 65%),
    linear-gradient(0deg, rgba(11, 11, 11, 0.9), transparent 65%);
}

.hero-inner {
  padding-top: 180px;
  padding-bottom: 72px;
}

.eyebrow,
.gate-number,
.mini-label {
  margin: 0 0 18px;
  color: var(--bronze-bright);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow span {
  padding: 0 8px;
  color: var(--verdigris-bright);
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1,
h2,
h3 {
  margin-top: 0;
  font-family: var(--serif);
  font-weight: 400;
  line-height: 0.98;
}

h1 {
  max-width: 990px;
  margin-bottom: 28px;
  font-size: clamp(3.4rem, 7.7vw, 7.8rem);
  letter-spacing: -0.055em;
}

h1 i,
h2 i {
  color: var(--bronze-bright);
  font-style: italic;
}

h2 {
  max-width: 920px;
  margin-bottom: 25px;
  font-size: clamp(2.8rem, 5.5vw, 6rem);
  letter-spacing: -0.045em;
}

h3 {
  margin-bottom: 12px;
  font-size: clamp(1.25rem, 2.1vw, 2rem);
  line-height: 1.12;
}

.hero-deck,
.chapter-lead {
  max-width: 780px;
  color: var(--bone-dim);
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  line-height: 1.48;
}

.hero-deck {
  margin: 0 0 32px;
}

.hero-actions,
.dialog-actions,
.archive-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.primary-action,
.secondary-action,
.control-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.075em;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  transition: background 250ms ease, color 250ms ease, border-color 250ms ease, transform 250ms var(--ease);
}

.primary-action,
.control-button {
  background: var(--bronze);
  color: var(--ink);
}

.primary-action:hover,
.control-button:hover {
  background: var(--bronze-bright);
  transform: translateY(-2px);
}

.secondary-action,
.control-button.quiet {
  border-color: rgba(233, 226, 208, 0.34);
  background: rgba(11, 11, 11, 0.25);
  color: var(--bone);
}

.secondary-action:hover,
.control-button.quiet:hover {
  border-color: var(--bronze-bright);
  background: rgba(183, 139, 69, 0.12);
}

.hero-ledger {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  max-width: 1080px;
  margin-top: 64px;
  border: 1px solid rgba(233, 226, 208, 0.13);
  background: rgba(233, 226, 208, 0.13);
}

.hero-ledger > div {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 14px;
  min-height: 132px;
  padding: 22px;
  background: rgba(11, 11, 11, 0.76);
  backdrop-filter: blur(10px);
}

.hero-ledger span {
  color: var(--bronze-bright);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.hero-ledger p {
  margin: 0;
  color: var(--bone-dim);
  font-size: 0.84rem;
  line-height: 1.55;
}

.hero-ledger strong {
  display: block;
  margin-bottom: 4px;
  color: var(--bone);
}

.media-note {
  position: absolute;
  right: 24px;
  bottom: 18px;
  z-index: 8;
  max-width: 430px;
  margin: 0;
  color: rgba(233, 226, 208, 0.52);
  font-size: 0.62rem;
  letter-spacing: 0.02em;
  text-align: right;
}

.image-panel {
  background: var(--ink-soft);
}

.image-panel .section-image {
  z-index: -1;
  background-position: center;
  background-size: cover;
  filter: saturate(0.8);
}

.image-panel .section-image::after,
.code-backdrop::after,
.emanation-image::after,
.lexicon-image::after,
.archive-scrim {
  position: absolute;
  inset: 0;
  content: "";
}

.form-section .section-image {
  background-image: url("assets/images/02-form.webp");
  background-position: 68% center;
}

.form-section .section-image::after {
  background: linear-gradient(90deg, rgba(11, 11, 11, 0.98) 0%, rgba(11, 11, 11, 0.82) 40%, rgba(11, 11, 11, 0.28) 100%);
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(520px, 1.2fr);
  gap: 7vw;
  align-items: center;
}

.chapter-copy p:not(.gate-number, .mini-label, .chapter-lead),
.section-heading p:not(.gate-number, .chapter-lead) {
  color: var(--bone-dim);
}

.boundary-card,
.equation-card,
.formula-panel,
.non-equivalence-banner,
.golem-note {
  border-left: 2px solid var(--bronze);
  background: rgba(11, 11, 11, 0.7);
}

.boundary-card {
  margin: 32px 0 24px;
  padding: 24px;
}

.boundary-card p:last-child {
  margin-bottom: 0;
}

details {
  padding: 18px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

details summary {
  min-height: 44px;
  color: var(--bone);
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 650;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

details p {
  margin-bottom: 0;
}

.instrument-card {
  border: 1px solid rgba(233, 226, 208, 0.17);
  background: rgba(18, 18, 16, 0.92);
  box-shadow: 0 35px 90px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(18px);
}

.shell-lab,
.tokenizer-lab,
.attention-lab {
  padding: clamp(22px, 3vw, 38px);
}

.instrument-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.instrument-heading h3,
.instrument-heading p {
  margin-bottom: 0;
}

.local-badge,
.context-meter {
  flex: 0 0 auto;
  padding: 8px 10px;
  border: 1px solid rgba(111, 157, 148, 0.55);
  color: var(--verdigris-bright);
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.instrument-note,
.source-note,
.status-line,
.hard-stop {
  color: var(--bone-dim);
  font-size: 0.78rem;
}

.shell-stage {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  max-height: 530px;
  margin: 24px auto;
  border: 1px solid rgba(183, 139, 69, 0.22);
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(62, 107, 100, 0.15), transparent 46%),
    repeating-radial-gradient(circle, transparent 0 13%, rgba(183, 139, 69, 0.08) 13.2% 13.5%);
}

.shell-stage::before,
.shell-stage::after {
  position: absolute;
  width: 90%;
  height: 1px;
  background: rgba(183, 139, 69, 0.2);
  content: "";
}

.shell-stage::after {
  transform: rotate(90deg);
}

.shell-grid {
  position: absolute;
  inset: 7%;
}

.study-shell {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  place-items: center;
  width: clamp(38px, 4vw, 52px);
  height: clamp(46px, 4.8vw, 62px);
  padding: 0;
  border: 1px solid rgba(233, 226, 208, 0.35);
  border-radius: 46% 54% 49% 51%;
  background: #bfb7a5;
  color: var(--ink);
  cursor: pointer;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.35), inset 0 0 0 5px rgba(255, 255, 255, 0.08);
  transform: translate(-50%, -50%) translate(var(--x, 0), var(--y, 0));
  transition: background 220ms ease, transform 280ms var(--ease), border-color 220ms ease;
}

.study-shell::before {
  width: 38%;
  height: 70%;
  border-radius: 50%;
  background: var(--ink-soft);
  content: "";
  transition: transform 260ms var(--ease), width 260ms var(--ease), background 260ms ease;
}

.study-shell[data-state="a"] {
  border-color: var(--bronze-bright);
  background: var(--bone);
}

.study-shell[data-state="b"] {
  border-color: var(--verdigris-bright);
  background: #6f746d;
}

.study-shell[data-state="b"]::before {
  width: 68%;
  height: 28%;
  background: var(--ink);
  transform: rotate(90deg);
}

.study-shell[data-state="unset"] {
  opacity: 0.46;
}

.count-core {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 35%;
  aspect-ratio: 1;
  border: 1px solid rgba(183, 139, 69, 0.35);
  border-radius: 50%;
  background: rgba(11, 11, 11, 0.86);
}

.count-core strong {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 400;
  line-height: 1;
}

.count-core span,
.count-core small {
  color: var(--bone-dim);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.instrument-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.control-button {
  min-height: 44px;
  padding: 0 14px;
  font-size: 0.68rem;
}

.status-line {
  min-height: 1.5em;
  margin: 18px 0;
}

.pair-ledger,
.token-readout {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
}

.pair-ledger > div,
.token-readout > div {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 5px;
  padding: 14px;
  background: var(--ink-soft);
}

.pair-ledger span,
.token-readout span {
  color: rgba(233, 226, 208, 0.52);
  font-size: 0.61rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pair-ledger strong,
.token-readout strong {
  overflow: hidden;
  color: var(--bone);
  font-family: var(--mono);
  font-size: 0.86rem;
  text-overflow: ellipsis;
}

.hard-stop {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(139, 58, 42, 0.55);
  color: #d4aa9d;
}

.hard-stop span {
  margin-right: 6px;
  color: #c66b55;
}

.code-section {
  display: flex;
  align-items: center;
  background: var(--ink);
}

.code-backdrop {
  z-index: -2;
  background: url("assets/images/03-code.webp") center / cover no-repeat;
  filter: saturate(0.72);
}

.code-backdrop::after {
  background:
    linear-gradient(90deg, rgba(11, 11, 11, 0.98) 0%, rgba(11, 11, 11, 0.75) 48%, rgba(11, 11, 11, 0.5) 100%),
    linear-gradient(0deg, rgba(11, 11, 11, 0.75), transparent 50%);
}

.token-canvas {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  opacity: 0.48;
  pointer-events: none;
}

.code-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(520px, 1.15fr);
  gap: 8vw;
  align-items: center;
}

.equation-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 30px 0 24px;
  padding: 22px;
  color: var(--bone);
  font-family: var(--mono);
  font-size: 0.74rem;
}

.equation-card span {
  padding: 6px 8px;
  border: 1px solid var(--line);
  background: rgba(233, 226, 208, 0.04);
}

.equation-card b {
  color: var(--bronze-bright);
  font-weight: 400;
}

.tokenizer-lab label,
.lexicon-controls label,
.temperature-control {
  display: block;
  margin-bottom: 8px;
  color: var(--bone-dim);
  font-size: 0.69rem;
  font-weight: 650;
  letter-spacing: 0.075em;
  text-transform: uppercase;
}

textarea,
input[type="search"] {
  width: 100%;
  border: 1px solid rgba(233, 226, 208, 0.27);
  border-radius: 0;
  background: rgba(11, 11, 11, 0.75);
  color: var(--bone);
}

textarea {
  min-height: 126px;
  padding: 16px;
  resize: vertical;
  font-family: var(--serif);
  font-size: 1.05rem;
}

textarea::placeholder,
input::placeholder {
  color: rgba(233, 226, 208, 0.35);
}

.tokenizer-lab .instrument-controls {
  margin: 12px 0 18px;
}

.token-window {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  min-height: 190px;
  padding: 14px;
  border: 1px solid rgba(62, 107, 100, 0.42);
  background: rgba(6, 13, 12, 0.58);
}

.token-chip {
  display: flex;
  min-width: 0;
  min-height: 36px;
  align-items: center;
  justify-content: center;
  padding: 5px 7px;
  border: 1px solid rgba(111, 157, 148, 0.35);
  background: rgba(62, 107, 100, 0.18);
  color: var(--bone);
  font-family: var(--mono);
  font-size: 0.65rem;
  text-align: center;
}

.token-chip span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.empty-token {
  border-color: rgba(233, 226, 208, 0.08);
  background: rgba(233, 226, 208, 0.025);
}

.empty-state {
  align-self: center;
  justify-self: center;
  margin: auto;
  color: rgba(233, 226, 208, 0.72);
  font-size: 0.75rem;
  grid-column: 1 / -1;
}

.token-readout {
  grid-template-columns: repeat(3, 1fr);
  margin-top: 12px;
}

.attention-section .section-image {
  background-image: url("assets/images/04-attention.webp");
  background-position: center top;
  opacity: 0.25;
}

.attention-section .section-image::after {
  background: linear-gradient(0deg, var(--ink) 10%, rgba(11, 11, 11, 0.78) 72%, rgba(11, 11, 11, 0.3));
}

.wide-heading {
  max-width: 1000px;
  margin-bottom: 46px;
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-bottom: 34px;
  border: 1px solid var(--line);
  background: var(--line);
}

.formula-panel {
  padding: clamp(24px, 4vw, 42px);
  border-left: 0;
  background: rgba(16, 16, 14, 0.9);
}

.pair-formula {
  box-shadow: inset 3px 0 0 var(--verdigris);
}

.display-equation {
  overflow-x: auto;
  margin: 18px 0 26px;
  color: var(--bone);
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2.2vw, 1.8rem);
  white-space: nowrap;
}

.formula-panel ul {
  margin: 0;
  padding-left: 20px;
  color: var(--bone-dim);
  font-size: 0.85rem;
}

.formula-panel li + li {
  margin-top: 9px;
}

.attention-lab {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(420px, 1.3fr);
  gap: 26px 46px;
}

.attention-lab .instrument-heading,
.attention-lab .instrument-note,
.attention-lab > input,
.attention-lab > button {
  grid-column: 1;
}

.attention-lab > button {
  justify-self: start;
}

.temperature-control output {
  color: var(--bronze-bright);
  font-family: var(--mono);
}

input[type="range"] {
  width: 100%;
  min-height: 32px;
  accent-color: var(--bronze);
  cursor: pointer;
}

.matrix-output {
  display: grid;
  grid-column: 2;
  grid-row: 1 / span 4;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  min-height: 230px;
  padding: 20px;
  border: 1px solid rgba(183, 139, 69, 0.24);
  background: #10100e;
}

.matrix-cell {
  position: relative;
  display: flex;
  min-height: 88px;
  flex-direction: column;
  justify-content: space-between;
  padding: 14px;
  overflow: hidden;
  border: 1px solid rgba(233, 226, 208, 0.1);
  background: rgba(233, 226, 208, 0.03);
}

.matrix-cell::before {
  position: absolute;
  left: 0;
  bottom: 0;
  width: calc(var(--weight) * 100%);
  height: 4px;
  background: linear-gradient(90deg, var(--verdigris), var(--bronze-bright));
  content: "";
}

.matrix-cell span {
  color: rgba(233, 226, 208, 0.48);
  font-family: var(--mono);
  font-size: 0.64rem;
}

.matrix-cell strong {
  font-family: var(--serif);
  font-size: 1.75rem;
  font-weight: 400;
}

.non-equivalence-banner {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: 180px 1fr;
  gap: 22px;
  align-items: start;
  padding: 20px 22px;
  border-left-color: var(--ember);
}

.non-equivalence-banner strong {
  color: #d4aa9d;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.non-equivalence-banner p {
  margin: 0;
  color: var(--bone-dim);
  font-size: 0.84rem;
}

.emanation-section {
  background: #12110e;
}

.emanation-image {
  z-index: -2;
  height: 56%;
  background: url("assets/images/05-emanation.webp") center / cover no-repeat;
  filter: saturate(0.7) contrast(1.04);
}

.emanation-image::after {
  background: linear-gradient(0deg, #12110e 0%, rgba(18, 17, 14, 0.38) 65%, rgba(18, 17, 14, 0.12));
}

.emanation-inner {
  padding-top: min(46vh, 520px);
}

.section-heading {
  max-width: 850px;
}

.atlas-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  margin-top: 46px;
  border: 1px solid var(--line);
  background: var(--line);
}

.atlas-tabs button,
.filter-chips button {
  min-height: 48px;
  padding: 0 20px;
  border: 0;
  background: var(--ink-soft);
  color: var(--bone-dim);
  cursor: pointer;
  font-size: 0.7rem;
  letter-spacing: 0.065em;
  text-transform: uppercase;
}

.atlas-tabs button[aria-selected="true"],
.filter-chips button[aria-pressed="true"] {
  background: var(--bronze);
  color: var(--ink);
}

.atlas-panel {
  display: grid;
  grid-template-columns: minmax(280px, 0.75fr) minmax(440px, 1.25fr);
  gap: 5vw;
  min-height: 480px;
  padding: clamp(28px, 5vw, 58px);
  border: 1px solid var(--line);
  border-top: 0;
  background: rgba(11, 11, 11, 0.62);
}

.atlas-copy h3 {
  font-size: clamp(1.8rem, 3.2vw, 3.2rem);
}

.atlas-copy p,
.atlas-copy li {
  color: var(--bone-dim);
}

.atlas-copy .cardinality {
  display: block;
  margin: 24px 0 18px;
  color: var(--bronze-bright);
  font-family: var(--serif);
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  line-height: 1;
}

.atlas-diagram {
  display: grid;
  grid-template-columns: repeat(var(--cols, 4), 1fr);
  gap: 5px;
  align-content: center;
  padding: 18px;
  border: 1px solid rgba(183, 139, 69, 0.2);
  background:
    linear-gradient(rgba(183, 139, 69, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(183, 139, 69, 0.06) 1px, transparent 1px),
    #0f0f0d;
  background-size: 24px 24px;
}

.atlas-unit {
  display: grid;
  place-items: center;
  min-height: 44px;
  border: 1px solid rgba(233, 226, 208, 0.15);
  background: rgba(233, 226, 208, 0.04);
  color: var(--bone-dim);
  font-family: var(--mono);
  font-size: 0.63rem;
}

.atlas-unit.type-b {
  border-color: rgba(62, 107, 100, 0.55);
  background: rgba(62, 107, 100, 0.12);
}

.impossible-map {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px 28px;
  align-items: center;
  margin-top: 30px;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid rgba(139, 58, 42, 0.55);
  background: rgba(139, 58, 42, 0.08);
}

.impossible-map h3,
.impossible-map p {
  margin-bottom: 0;
}

.impossible-map > p {
  grid-column: 1 / -1;
  margin-top: 0;
  color: #d4aa9d;
  font-size: 0.83rem;
}

.authority-section .section-image {
  background-image: url("assets/images/06-living-force.webp");
  background-position: left center;
}

.authority-section .section-image::after {
  background: linear-gradient(90deg, rgba(11, 11, 11, 0.15), rgba(11, 11, 11, 0.82) 53%, rgba(11, 11, 11, 0.98));
}

.authority-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(520px, 1.3fr);
  gap: 7vw;
  align-items: center;
}

.authority-instrument {
  padding: clamp(26px, 4vw, 48px);
  border: 1px solid var(--line);
  background: rgba(11, 11, 11, 0.86);
  backdrop-filter: blur(18px);
}

.authority-choices {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 28px 0 18px;
}

.authority-choices button {
  display: flex;
  min-height: 145px;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  padding: 18px;
  border: 1px solid var(--line);
  background: rgba(233, 226, 208, 0.035);
  color: var(--bone-dim);
  cursor: pointer;
  text-align: left;
  transition: border 220ms ease, background 220ms ease, transform 220ms var(--ease);
}

.authority-choices button:hover {
  transform: translateY(-3px);
}

.authority-choices button[aria-pressed="true"] {
  border-color: var(--bronze-bright);
  background: rgba(183, 139, 69, 0.13);
  color: var(--bone);
}

.authority-choices span {
  color: var(--bronze-bright);
  font-family: var(--mono);
  font-size: 0.68rem;
}

.authority-choices strong {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 400;
}

.authority-choices small {
  font-size: 0.69rem;
}

.authority-reveal {
  min-height: 88px;
  padding: 20px;
  border: 1px solid rgba(62, 107, 100, 0.5);
  background: rgba(62, 107, 100, 0.1);
  color: var(--bone-dim);
}

.authority-reveal p {
  margin: 0;
}

.golem-note {
  margin-top: 22px;
  padding: 20px;
  border-left-color: var(--verdigris);
}

.golem-note p:last-child {
  margin-bottom: 0;
  color: var(--bone-dim);
  font-size: 0.82rem;
}

.lexicon-section {
  min-height: auto;
  background: #11110f;
}

.lexicon-image {
  z-index: -2;
  height: 540px;
  background: url("assets/images/07-lexicon.webp") center / cover no-repeat;
  filter: saturate(0.72);
}

.lexicon-image::after {
  background: linear-gradient(0deg, #11110f 0%, rgba(17, 17, 15, 0.48) 75%, rgba(17, 17, 15, 0.1));
}

.lexicon-inner {
  padding-top: 390px;
}

.lexicon-controls {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) auto;
  gap: 10px 24px;
  align-items: end;
  margin-top: 42px;
  padding: 24px;
  border: 1px solid var(--line);
  background: rgba(11, 11, 11, 0.8);
}

.lexicon-controls label {
  grid-column: 1;
  margin-bottom: 0;
}

input[type="search"] {
  grid-column: 1;
  min-height: 50px;
  padding: 0 15px;
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  grid-column: 2;
  grid-row: 1 / span 2;
  gap: 1px;
  align-self: end;
  background: var(--line);
}

.filter-chips button {
  min-height: 50px;
  padding: 0 14px;
  font-size: 0.62rem;
}

.results-count {
  margin: 22px 0 14px;
  color: rgba(233, 226, 208, 0.72);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lexicon-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.lexicon-card {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  border: 1px solid var(--line);
  background: var(--ink-soft);
}

.lexicon-card > header {
  padding: 24px;
  border-right: 1px solid var(--line);
}

.lexicon-card .term-group {
  margin-bottom: 10px;
  color: var(--bronze-bright);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.lexicon-card h3 {
  margin-bottom: 10px;
  font-size: 1.45rem;
}

.lexicon-card .portuguese {
  color: var(--bone-dim);
  font-size: 0.72rem;
}

.lexicon-card dl {
  display: grid;
  gap: 0;
  margin: 0;
}

.lexicon-card dl > div {
  padding: 17px 20px;
}

.lexicon-card dl > div + div {
  border-top: 1px solid var(--line);
}

.lexicon-card dt {
  margin-bottom: 5px;
  color: rgba(233, 226, 208, 0.72);
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lexicon-card dd {
  margin: 0;
  color: var(--bone-dim);
  font-size: 0.79rem;
  line-height: 1.52;
}

.definition-translation {
  display: block;
  margin-top: 9px;
  padding-top: 9px;
  border-top: 1px solid rgba(233, 226, 208, 0.1);
  color: rgba(233, 226, 208, 0.78);
}

.lexicon-card .boundary dd {
  color: #d4aa9d;
}

.archive-section {
  display: flex;
  min-height: 110svh;
  align-items: center;
  background: var(--ink);
}

.archive-image {
  z-index: -2;
  background: url("assets/images/08-archive.webp") center / cover no-repeat;
  filter: saturate(0.65) contrast(1.04);
}

.archive-scrim {
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(11, 11, 11, 0.98), rgba(11, 11, 11, 0.78) 54%, rgba(11, 11, 11, 0.52)),
    linear-gradient(0deg, rgba(11, 11, 11, 0.96) 0%, transparent 45%, rgba(11, 11, 11, 0.45));
}

.archive-inner > h2,
.archive-inner > .chapter-lead {
  max-width: 920px;
}

.completion-card {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 28px;
  align-items: center;
  max-width: 820px;
  margin: 42px 0 26px;
  padding: 24px;
  border: 1px solid var(--line-strong);
  background: rgba(11, 11, 11, 0.78);
  backdrop-filter: blur(14px);
}

.completion-ring {
  display: flex;
  align-items: baseline;
  justify-content: center;
  width: 112px;
  aspect-ratio: 1;
  border: 1px solid var(--bronze);
  border-radius: 50%;
}

.completion-ring span {
  align-self: center;
  font-family: var(--serif);
  font-size: 3.2rem;
  line-height: 1;
}

.completion-ring small {
  align-self: center;
  color: var(--bone-dim);
  font-family: var(--mono);
}

.completion-card h3,
.completion-card p {
  margin-bottom: 8px;
}

.completion-card p:last-child {
  color: var(--bone-dim);
  font-size: 0.83rem;
}

.archive-film {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.75fr);
  gap: 1px;
  max-width: 1120px;
  margin: 38px 0 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.archive-film-frame {
  display: grid;
  place-items: center;
  min-width: 0;
  background: #050505;
}

.archive-film video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #050505;
  object-fit: cover;
}

.archive-film figcaption {
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin: 0;
  padding: clamp(24px, 4vw, 42px);
  background: rgba(11, 11, 11, 0.92);
}

.archive-film figcaption h3 {
  margin: 12px 0 16px;
}

.archive-film figcaption > p:last-of-type {
  color: var(--bone-dim);
  font-size: 0.82rem;
}

.archive-film figcaption a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 14px;
  color: var(--bone);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.055em;
  text-decoration-color: var(--bronze);
  text-underline-offset: 5px;
  text-transform: uppercase;
}

.sources-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  max-width: 1120px;
  margin-top: 58px;
  border: 1px solid var(--line);
  background: var(--line);
}

.sources-grid article {
  min-height: 260px;
  padding: 25px;
  background: rgba(11, 11, 11, 0.87);
  backdrop-filter: blur(12px);
}

.sources-grid article > span {
  color: var(--bronze-bright);
  font-size: 0.61rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.sources-grid h3 {
  margin-top: 22px;
  font-size: 1.45rem;
}

.sources-grid p {
  color: var(--bone-dim);
  font-size: 0.8rem;
}

.sources-grid a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--bone);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.055em;
  text-decoration-color: var(--bronze);
  text-underline-offset: 5px;
  text-transform: uppercase;
}

.source-button {
  margin-top: 26px;
}

footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  padding: 50px max(40px, calc((100vw - var(--rail) - var(--max)) / 2));
  border-top: 1px solid var(--line);
  background: #070707;
  color: rgba(233, 226, 208, 0.72);
  font-size: 0.72rem;
}

footer p {
  margin: 0;
}

footer strong {
  color: var(--bone-dim);
}

.atlas-dialog {
  width: min(720px, calc(100% - 34px));
  max-height: min(86vh, 780px);
  padding: 0;
  overflow: auto;
  border: 1px solid rgba(183, 139, 69, 0.62);
  border-radius: 0;
  background: #151512;
  color: var(--bone);
  box-shadow: 0 40px 130px rgba(0, 0, 0, 0.72);
}

.atlas-dialog::backdrop {
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
}

.atlas-dialog form {
  position: relative;
  padding: clamp(28px, 6vw, 58px);
}

.atlas-dialog h2 {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
}

.atlas-dialog p,
.atlas-dialog li,
.atlas-dialog dd {
  color: var(--bone-dim);
}

.dialog-close {
  position: absolute;
  top: 16px;
  right: 16px;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--bone);
  cursor: pointer;
  font-family: var(--serif);
  font-size: 1.8rem;
}

.dialog-rules {
  display: grid;
  gap: 12px;
  margin: 30px 0;
  padding: 0;
  list-style: none;
}

.dialog-rules li {
  padding: 14px 0 14px 22px;
  border-left: 1px solid var(--bronze);
}

.dialog-rules strong {
  color: var(--bone);
}

.method-list {
  display: grid;
  gap: 1px;
  margin: 28px 0;
  background: var(--line);
}

.method-list > div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 18px;
  padding: 18px;
  background: var(--ink-soft);
}

.method-list dt {
  color: var(--bronze-bright);
  font-weight: 650;
}

.method-list dd {
  margin: 0;
}

.sources-dialog {
  width: min(800px, calc(100% - 34px));
}

.still-mode *,
.still-mode *::before,
.still-mode *::after {
  animation: none !important;
  transition-duration: 0.001ms !important;
}

@media (max-width: 1120px) {
  :root {
    --rail: 0px;
  }

  .journey-rail {
    display: none;
  }

  .split-layout,
  .code-layout,
  .authority-layout {
    grid-template-columns: 1fr;
    gap: 52px;
  }

  .chapter-copy {
    max-width: 790px;
  }

  .form-section .section-image::after {
    background: linear-gradient(0deg, rgba(11, 11, 11, 0.98) 0%, rgba(11, 11, 11, 0.75) 74%, rgba(11, 11, 11, 0.34));
  }

  .form-section .section-image {
    opacity: 0.42;
  }

  .authority-section .section-image::after {
    background: linear-gradient(0deg, rgba(11, 11, 11, 0.98), rgba(11, 11, 11, 0.7));
  }

  .authority-section .section-image {
    opacity: 0.48;
  }

  .sources-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 820px) {
  .site-header {
    min-height: 64px;
    padding: 0 16px;
  }

  .header-nav {
    gap: 10px;
  }

  .language-control {
    gap: 0;
  }

  .language-control label {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }

  .language-control select {
    width: 92px;
  }

  .header-nav .text-button {
    display: inline-flex;
    padding-inline: 8px;
    font-size: 0.61rem;
  }

  .chapter-inner {
    width: min(calc(100% - 34px), var(--max));
    padding: 112px 0 100px;
  }

  .hero-inner {
    padding-top: 130px;
    padding-bottom: 74px;
  }

  .eyebrow {
    max-width: 340px;
  }

  .eyebrow span {
    padding: 0 3px;
  }

  .hero-ledger {
    grid-template-columns: 1fr;
    margin-top: 44px;
  }

  .hero-ledger > div {
    min-height: 0;
  }

  .media-note {
    right: 17px;
    bottom: 12px;
    left: 17px;
    max-width: none;
    text-align: left;
  }

  .pair-ledger {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .comparison-grid,
  .atlas-panel,
  .lexicon-card,
  .archive-film {
    grid-template-columns: 1fr;
  }

  .formula-panel {
    border-left: 0;
  }

  .pair-formula {
    box-shadow: inset 0 3px 0 var(--verdigris);
  }

  .attention-lab {
    grid-template-columns: 1fr;
  }

  .attention-lab .instrument-heading,
  .attention-lab .instrument-note,
  .attention-lab > input,
  .attention-lab > button,
  .matrix-output {
    grid-column: 1;
    grid-row: auto;
  }

  .non-equivalence-banner {
    grid-template-columns: 1fr;
  }

  .emanation-inner {
    padding-top: 330px;
  }

  .atlas-panel {
    min-height: 0;
  }

  .impossible-map {
    grid-template-columns: 1fr;
  }

  .impossible-map > p {
    grid-column: 1;
  }

  .authority-choices {
    grid-template-columns: 1fr;
  }

  .authority-choices button {
    min-height: 112px;
  }

  .lexicon-inner {
    padding-top: 330px;
  }

  .lexicon-controls {
    grid-template-columns: 1fr;
  }

  .filter-chips,
  .lexicon-controls label,
  input[type="search"] {
    grid-column: 1;
    grid-row: auto;
  }

  .lexicon-grid,
  .sources-grid {
    grid-template-columns: 1fr;
  }

  .lexicon-card > header {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .completion-card {
    grid-template-columns: 1fr;
  }

  footer {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 42px 18px;
  }
}

@media (max-width: 520px) {
  h1 {
    font-size: clamp(3rem, 16vw, 4.8rem);
  }

  h2 {
    font-size: clamp(2.55rem, 13vw, 4rem);
  }

  .wordmark span:last-child {
    display: none;
  }

  .language-control select {
    width: 68px;
    padding-left: 7px;
  }

  .hero-actions,
  .archive-actions,
  .dialog-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-action,
  .secondary-action {
    width: 100%;
  }

  .shell-lab,
  .tokenizer-lab,
  .attention-lab,
  .authority-instrument {
    padding: 18px;
  }

  .shell-stage {
    width: 100%;
  }

  .study-shell {
    width: 34px;
    height: 42px;
  }

  .instrument-heading {
    flex-direction: column;
  }

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

  .token-readout {
    grid-template-columns: 1fr;
  }

  .atlas-tabs {
    flex-direction: column;
  }

  .filter-chips {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .lexicon-card dl > div,
  .lexicon-card > header {
    padding: 18px;
  }

  .sources-grid article {
    min-height: 220px;
  }

  .method-list > div {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .hero-video {
    display: none;
  }

  .hero {
    background: url("assets/images/01-threshold.webp") center / cover no-repeat;
  }
}

@media (forced-colors: active) {
  .hero-video,
  .section-image,
  .code-backdrop,
  .emanation-image,
  .lexicon-image,
  .archive-image {
    display: none;
  }

  .primary-action,
  .control-button,
  .atlas-tabs button[aria-selected="true"],
  .filter-chips button[aria-pressed="true"] {
    border: 1px solid ButtonText;
  }
}