:root {
  --ink: #17191a;
  --muted: #555a56;
  --paper: #f2eee3;
  --paper-deep: #e8e1d3;
  --white: #fffdf7;
  --night: #141719;
  --night-soft: #1d2225;
  --line: rgba(23, 25, 26, 0.18);
  --line-light: rgba(255, 253, 247, 0.2);
  --blue: #2f67ff;
  --blue-light: #98b3ff;
  --serif: "Iowan Old Style", "Baskerville", "Songti SC", "STSong", serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --side: clamp(22px, 5vw, 76px);
  --ease: cubic-bezier(0.2, 0.75, 0.25, 1);
}

* {
  box-sizing: border-box;
}

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

[id] {
  scroll-margin-top: 74px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

button,
a {
  color: inherit;
}

a {
  text-decoration: none;
}

button {
  font: inherit;
}

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

::selection {
  color: var(--white);
  background: var(--blue);
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 5px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: var(--white);
  background: var(--blue);
  transform: translateY(-150%);
  transition: transform 180ms ease;
}

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

.scroll-progress {
  position: fixed;
  z-index: 120;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  pointer-events: none;
}

.scroll-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: left;
}

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 82px;
  padding: 0 var(--side);
  color: var(--white);
  border-bottom: 1px solid transparent;
  transition: height 300ms var(--ease), color 300ms ease, background 300ms ease, border 300ms ease;
}

.site-header.scrolled {
  height: 66px;
  color: var(--ink);
  background: rgba(242, 238, 227, 0.92);
  border-bottom-color: var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  font-size: 15px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.brand-mark {
  display: grid;
  width: 31px;
  height: 31px;
  place-items: center;
  color: var(--white);
  background: var(--blue);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1;
  border-radius: 50%;
}

.desktop-nav {
  display: flex;
  gap: clamp(22px, 3vw, 46px);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.desktop-nav a {
  position: relative;
  padding: 7px 0;
  opacity: 0.78;
}

.desktop-nav a::after {
  position: absolute;
  bottom: 1px;
  left: 0;
  width: 100%;
  height: 1px;
  content: "";
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 250ms var(--ease);
}

.desktop-nav a:hover {
  opacity: 1;
}

.desktop-nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.menu-button {
  display: none;
  gap: 10px;
  align-items: center;
  padding: 8px 0;
  color: inherit;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.menu-button i,
.menu-button i::after {
  display: block;
  width: 19px;
  height: 1px;
  content: "";
  background: currentColor;
  transition: transform 250ms ease;
}

.menu-button i::after {
  transform: translateY(5px);
}

.menu-button[aria-expanded="true"] i {
  transform: translateY(2px) rotate(45deg);
}

.menu-button[aria-expanded="true"] i::after {
  transform: rotate(-90deg);
}

.mobile-menu {
  position: fixed;
  z-index: 90;
  inset: 0;
  display: grid;
  align-content: center;
  gap: 22px;
  padding: 100px var(--side) 50px;
  color: var(--white);
  background: var(--night);
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-menu a {
  padding-bottom: 16px;
  font-family: var(--serif);
  font-size: clamp(30px, 9vw, 46px);
  border-bottom: 1px solid var(--line-light);
}

.hero {
  position: relative;
  display: grid;
  min-height: 100svh;
  overflow: hidden;
  color: var(--white);
  background: var(--night);
  isolation: isolate;
}

.hero::before {
  position: absolute;
  z-index: 1;
  inset: 0;
  content: "";
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 7.5vw 7.5vw;
  mask-image: linear-gradient(to right, #000 0%, transparent 68%);
}

.hero-image-wrap {
  position: absolute;
  z-index: 0;
  top: 0;
  right: 0;
  width: 57%;
  height: 100%;
  overflow: hidden;
}

.hero-image {
  width: 100%;
  height: 112%;
  object-fit: cover;
  object-position: 52% 28%;
  filter: grayscale(1) contrast(1.07) brightness(0.74);
  transform: translate3d(0, var(--hero-shift, 0), 0) scale(1.035);
  transition: transform 900ms var(--ease);
}

.hero-veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--night) 0%, rgba(20, 23, 25, 0.86) 12%, rgba(20, 23, 25, 0.18) 61%, rgba(20, 23, 25, 0.1) 100%),
    linear-gradient(0deg, rgba(20, 23, 25, 0.66) 0%, transparent 35%);
}

.hero-copy {
  position: relative;
  z-index: 2;
  align-self: center;
  width: min(720px, 64vw);
  padding: 128px 0 80px var(--side);
}

.hero-kicker,
.eyebrow {
  margin: 0 0 25px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}

.hero-kicker {
  color: var(--blue-light);
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(52px, 6.65vw, 102px);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.hero h1 em {
  color: var(--blue-light);
  font-style: normal;
}

.hero-intro {
  max-width: 520px;
  margin: 34px 0 0;
  color: rgba(255, 253, 247, 0.72);
  font-size: clamp(15px, 1.35vw, 19px);
}

.hero-actions {
  display: flex;
  gap: 27px;
  align-items: center;
  margin-top: 38px;
}

.primary-action {
  display: inline-flex;
  min-height: 52px;
  gap: 32px;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  color: var(--white);
  background: var(--blue);
  font-size: 14px;
  font-weight: 650;
  transition: gap 250ms var(--ease), background 250ms ease, transform 250ms var(--ease);
}

.primary-action:hover {
  gap: 42px;
  background: #174fdc;
  transform: translateY(-2px);
}

.text-action {
  padding: 8px 0;
  color: rgba(255, 253, 247, 0.76);
  font-size: 13px;
  border-bottom: 1px solid rgba(255, 253, 247, 0.45);
}

.hero-caption {
  position: absolute;
  z-index: 2;
  right: var(--side);
  bottom: 32px;
  display: flex;
  gap: 13px;
  align-items: flex-start;
  color: rgba(255, 253, 247, 0.6);
  font-size: 10px;
  line-height: 1.45;
  letter-spacing: 0.04em;
}

.hero-caption span {
  color: var(--blue-light);
}

.hero-caption p {
  margin: 0;
}

.scroll-cue {
  position: absolute;
  z-index: 2;
  bottom: 30px;
  left: var(--side);
  display: flex;
  gap: 11px;
  align-items: center;
  font-size: 9px;
  letter-spacing: 0.18em;
}

.scroll-cue i {
  display: block;
  width: 42px;
  height: 1px;
  overflow: hidden;
  background: rgba(255, 253, 247, 0.3);
}

.scroll-cue i::after {
  display: block;
  width: 50%;
  height: 100%;
  content: "";
  background: var(--blue-light);
  animation: scroll-line 1.8s var(--ease) infinite;
}

@keyframes scroll-line {
  0% { transform: translateX(-120%); }
  60%, 100% { transform: translateX(220%); }
}

.reveal-on-load {
  opacity: 0;
  transform: translateY(26px);
}

.loaded .reveal-on-load {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 850ms var(--ease), transform 850ms var(--ease);
}

.loaded .reveal-on-load:nth-child(2) { transition-delay: 90ms; }
.loaded .reveal-on-load:nth-child(3) { transition-delay: 180ms; }
.loaded .reveal-on-load:nth-child(4) { transition-delay: 270ms; }

.section-pad {
  padding-right: var(--side);
  padding-left: var(--side);
}

.section-label {
  display: flex;
  gap: 13px;
  align-items: center;
  margin-bottom: 72px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.section-label::after {
  width: 74px;
  height: 1px;
  content: "";
  background: currentColor;
  opacity: 0.45;
}

.section-label span {
  color: var(--blue);
}

.section-label.light {
  color: rgba(255, 253, 247, 0.58);
}

.section-label.light span {
  color: var(--blue-light);
}

.question-index {
  padding-top: clamp(105px, 12vw, 180px);
  padding-bottom: clamp(110px, 13vw, 190px);
  background: var(--paper);
}

.question-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(420px, 1.25fr);
  gap: clamp(60px, 10vw, 170px);
  align-items: start;
}

.question-heading {
  position: sticky;
  top: 110px;
}

.eyebrow {
  color: var(--blue);
}

.question-heading h2,
.timeline-title-row h2,
.duel-head h2,
.relay-heading h2,
.lab-aside h2,
.terms-head h2,
.today-copy h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(42px, 5.3vw, 78px);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.05em;
}

.question-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.question-list li {
  border-bottom: 1px solid var(--line);
}

.question-list a {
  display: grid;
  grid-template-columns: 42px 1fr auto;
  gap: 18px;
  align-items: baseline;
  padding: 28px 4px;
  transition: padding 260ms var(--ease), color 260ms ease;
}

.question-list a:hover {
  padding-right: 0;
  padding-left: 12px;
  color: var(--blue);
}

.question-list span {
  color: var(--blue);
  font-family: var(--serif);
  font-size: 14px;
}

.question-list strong {
  font-family: var(--serif);
  font-size: clamp(21px, 2.1vw, 30px);
  font-weight: 500;
  letter-spacing: -0.025em;
}

.question-list small {
  color: var(--muted);
  font-size: 11px;
  white-space: nowrap;
}

.timeline-section {
  color: var(--white);
  background: var(--night);
}

.timeline-intro {
  padding-top: clamp(105px, 12vw, 175px);
  padding-bottom: clamp(95px, 10vw, 145px);
  border-bottom: 1px solid var(--line-light);
}

.timeline-title-row {
  display: grid;
  grid-template-columns: minmax(420px, 1.2fr) minmax(260px, 0.6fr);
  gap: 9vw;
  align-items: end;
}

.timeline-title-row p,
.duel-head > p,
.relay-heading p,
.lab-aside > p {
  max-width: 420px;
  margin: 0 0 8px;
  color: rgba(255, 253, 247, 0.58);
  font-size: 14px;
}

.timeline-shell {
  display: grid;
  grid-template-columns: minmax(190px, 22vw) 1fr;
}

.era-rail {
  position: sticky;
  top: 66px;
  height: calc(100svh - 66px);
  padding: 56px 2.5vw 42px var(--side);
  background: var(--night);
  border-right: 1px solid var(--line-light);
}

.era-rail > p {
  margin: 0 0 28px;
  color: rgba(255, 253, 247, 0.62);
  font-size: 9px;
  letter-spacing: 0.18em;
}

#era-nav {
  display: grid;
}

.era-nav-button {
  position: relative;
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 10px;
  padding: 12px 0;
  color: rgba(255, 253, 247, 0.62);
  text-align: left;
  background: transparent;
  border: 0;
  cursor: pointer;
  transition: color 220ms ease;
}

.era-nav-button::before {
  position: absolute;
  top: 50%;
  left: -2.5vw;
  width: 3px;
  height: 0;
  content: "";
  background: var(--blue);
  transform: translateY(-50%);
  transition: height 280ms var(--ease);
}

.era-nav-button span {
  font-family: var(--serif);
  font-size: 12px;
}

.era-nav-button strong {
  font-size: 12px;
  font-weight: 560;
}

.era-nav-button small {
  grid-column: 2;
  font-size: 9px;
}

.era-nav-button:hover,
.era-nav-button.active {
  color: var(--white);
}

.era-nav-button.active::before {
  height: 34px;
}

.era-chapter {
  position: relative;
  min-height: 100svh;
  padding: clamp(88px, 9vw, 145px) clamp(28px, 6vw, 100px);
  border-bottom: 1px solid var(--line-light);
  overflow: hidden;
  scroll-margin-top: 66px;
}

.era-chapter::after {
  position: absolute;
  z-index: 0;
  top: -0.18em;
  right: -0.01em;
  content: attr(data-number);
  color: rgba(255, 255, 255, 0.025);
  font-family: var(--serif);
  font-size: clamp(250px, 30vw, 470px);
  line-height: 1;
  pointer-events: none;
}

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

.era-meta {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 22px;
  color: var(--blue-light);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.era-meta i {
  width: 40px;
  height: 1px;
  background: currentColor;
}

.era-header {
  display: grid;
  grid-template-columns: 1fr minmax(220px, 0.48fr);
  gap: 7vw;
  align-items: end;
  padding-bottom: 55px;
}

.era-header h3 {
  max-width: 780px;
  margin: 0 0 25px;
  font-family: var(--serif);
  font-size: clamp(45px, 6.2vw, 92px);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.era-question {
  margin: 0;
  color: var(--blue-light);
  font-family: var(--serif);
  font-size: clamp(19px, 2vw, 28px);
}

.era-scene {
  margin: 0;
  color: rgba(255, 253, 247, 0.59);
  font-size: 13px;
}

.thinker-list {
  border-top: 1px solid var(--line-light);
}

.thinker-row {
  display: grid;
  width: 100%;
  grid-template-columns: 48px minmax(110px, 0.35fr) minmax(280px, 1fr) auto 24px;
  gap: 20px;
  align-items: center;
  padding: 23px 0;
  color: var(--white);
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-light);
  cursor: pointer;
  transition: color 250ms ease, padding 250ms var(--ease), background 250ms ease;
}

.thinker-row:hover {
  padding-right: 15px;
  padding-left: 15px;
  color: var(--blue-light);
  background: rgba(255, 255, 255, 0.035);
}

.thinker-index {
  color: rgba(255, 253, 247, 0.58);
  font-family: var(--serif);
  font-size: 12px;
}

.thinker-name {
  font-family: var(--serif);
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 500;
}

.thinker-thesis {
  color: rgba(255, 253, 247, 0.64);
  font-size: 13px;
}

.thinker-dates {
  color: rgba(255, 253, 247, 0.58);
  font-size: 9px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.thinker-arrow {
  font-size: 17px;
  transition: transform 250ms var(--ease);
}

.thinker-row:hover .thinker-arrow {
  transform: translateX(5px);
}

.bridge-note {
  display: grid;
  grid-template-columns: 145px 1fr;
  gap: 24px;
  margin-top: 42px;
  padding: 23px 0;
  border-top: 1px dashed rgba(152, 179, 255, 0.5);
  border-bottom: 1px dashed rgba(152, 179, 255, 0.5);
}

.bridge-note strong {
  color: var(--blue-light);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.bridge-note p {
  margin: 0;
  color: rgba(255, 253, 247, 0.62);
  font-size: 12px;
}

.duel-section {
  padding-top: clamp(105px, 12vw, 175px);
  padding-bottom: clamp(110px, 12vw, 180px);
  background: var(--paper-deep);
}

.duel-head {
  display: grid;
  grid-template-columns: 1fr minmax(260px, 0.5fr);
  gap: 9vw;
  align-items: end;
}

.duel-head > p {
  color: var(--muted);
}

.duel-tabs {
  display: flex;
  gap: 8px;
  margin-top: 72px;
  padding-bottom: 18px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
}

.duel-tabs::-webkit-scrollbar {
  display: none;
}

.duel-tab {
  flex: 0 0 auto;
  padding: 9px 15px;
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 12px;
}

.duel-tab.active {
  color: var(--white);
  background: var(--ink);
}

.duel-stage {
  display: grid;
  grid-template-columns: 1fr 74px 1fr;
  min-height: 480px;
  border-bottom: 1px solid var(--line);
}

.duel-side {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 58px clamp(10px, 3vw, 46px) 50px;
}

.duel-side:first-child {
  padding-left: 0;
}

.duel-side:last-child {
  padding-right: 0;
}

.duel-side small {
  color: var(--blue);
  font-size: 10px;
  letter-spacing: 0.14em;
}

.duel-side h3 {
  margin: 20px 0 15px;
  font-family: var(--serif);
  font-size: clamp(38px, 4.5vw, 65px);
  font-weight: 500;
  line-height: 1;
}

.duel-side blockquote {
  max-width: 440px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(21px, 2.5vw, 34px);
  line-height: 1.25;
}

.duel-side p {
  max-width: 430px;
  margin: 25px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.stance-button {
  align-self: flex-start;
  margin-top: 32px;
  padding: 11px 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--ink);
  cursor: pointer;
  font-weight: 650;
}

.stance-button:hover {
  color: var(--blue);
  border-color: var(--blue);
}

.duel-vs {
  display: grid;
  place-items: center;
  border-right: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.duel-vs span {
  display: grid;
  width: 47px;
  height: 47px;
  place-items: center;
  color: var(--white);
  background: var(--blue);
  border-radius: 50%;
  font-family: var(--serif);
  font-style: italic;
}

.duel-response {
  grid-column: 1 / -1;
  padding: 18px 0 0;
  color: var(--blue);
  font-size: 13px;
}

.relay-section {
  color: var(--white);
  background: var(--night-soft);
}

.relay-copy {
  padding-top: clamp(105px, 12vw, 175px);
}

.relay-heading {
  display: grid;
  grid-template-columns: 1fr minmax(260px, 0.52fr);
  gap: 9vw;
  align-items: end;
}

.relay-lines {
  padding-top: 85px;
  padding-bottom: clamp(110px, 12vw, 180px);
}

.relay-item {
  border-top: 1px solid var(--line-light);
}

.relay-item:last-child {
  border-bottom: 1px solid var(--line-light);
}

.relay-route {
  display: grid;
  grid-template-columns: minmax(170px, 0.34fr) 1fr auto;
  gap: 30px;
  align-items: center;
  width: 100%;
  padding: 30px 0;
  color: var(--white);
  text-align: left;
  background: transparent;
  border: 0;
  border: 0;
  cursor: pointer;
}

.relay-route > span {
  color: var(--blue-light);
  font-size: 10px;
  letter-spacing: 0.11em;
}

.relay-nodes {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.relay-nodes strong {
  font-family: var(--serif);
  font-size: clamp(20px, 2.3vw, 32px);
  font-weight: 500;
}

.relay-nodes i {
  width: clamp(25px, 4vw, 62px);
  height: 1px;
  background: var(--blue-light);
  transition: width 280ms var(--ease);
}

.relay-route:hover .relay-nodes i,
.relay-item.open .relay-nodes i {
  width: clamp(40px, 6vw, 88px);
}

.relay-expand {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 1px solid var(--line-light);
  border-radius: 50%;
}

.relay-explanation {
  padding: 0 58px 28px calc(34% + 30px);
  color: rgba(255, 253, 247, 0.6);
  font-size: 13px;
}

.relay-explanation[hidden] {
  display: none;
}

.relay-explanation p {
  max-width: 760px;
  margin: 0;
}

.lab-section {
  display: grid;
  grid-template-columns: minmax(300px, 0.7fr) minmax(440px, 1fr);
  gap: clamp(60px, 10vw, 150px);
  padding-top: clamp(105px, 12vw, 175px);
  padding-bottom: clamp(110px, 13vw, 190px);
  background: var(--paper);
}

.lab-aside {
  align-self: start;
}

.lab-aside .section-label {
  margin-bottom: 72px;
}

.lab-aside > p {
  margin-top: 28px;
  color: var(--muted);
}

.lab-console {
  min-height: 600px;
  align-self: start;
  padding: clamp(32px, 5vw, 68px);
  color: var(--white);
  background: var(--night);
}

.lab-progress {
  display: flex;
  gap: 9px;
  margin-bottom: 64px;
}

.lab-progress i {
  width: 38px;
  height: 2px;
  background: rgba(255, 255, 255, 0.18);
}

.lab-progress i.done,
.lab-progress i.current {
  background: var(--blue-light);
}

.lab-step-label {
  color: var(--blue-light);
  font-size: 10px;
  letter-spacing: 0.14em;
}

.lab-question {
  margin: 24px 0 48px;
  font-family: var(--serif);
  font-size: clamp(28px, 3.3vw, 48px);
  font-weight: 500;
  line-height: 1.2;
}

.lab-options {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-light);
}

.lab-option {
  display: grid;
  grid-template-columns: 27px 1fr;
  gap: 18px;
  padding: 22px 0;
  color: rgba(255, 253, 247, 0.78);
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-light);
  cursor: pointer;
}

.lab-option span:first-child {
  color: var(--blue-light);
  font-family: var(--serif);
}

.lab-option:hover {
  color: var(--white);
}

.lab-result h3 {
  margin: 28px 0 20px;
  font-family: var(--serif);
  font-size: clamp(36px, 4vw, 58px);
  font-weight: 500;
  line-height: 1.1;
}

.lab-result p {
  color: rgba(255, 253, 247, 0.64);
}

.lab-result strong {
  color: var(--blue-light);
  font-weight: 600;
}

.restart-button {
  margin-top: 30px;
  padding: 12px 18px;
  color: var(--white);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.34);
  cursor: pointer;
}

.lab-start > h3 {
  margin: 23px 0 8px;
  font-family: var(--serif);
  font-size: clamp(40px, 5vw, 68px);
  font-weight: 500;
  line-height: 1;
}

.lab-start > p {
  margin: 0 0 35px;
  color: rgba(255, 253, 247, 0.6);
  font-size: 12px;
}

.lab-pack-list {
  border-top: 1px solid var(--line-light);
}

.lab-pack-list button,
.lab-random {
  display: grid;
  width: 100%;
  grid-template-columns: 28px minmax(135px, 0.55fr) 1fr 20px;
  gap: 14px;
  align-items: center;
  padding: 20px 0;
  color: var(--white);
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-light);
  cursor: pointer;
  transition: padding 220ms var(--ease), color 180ms ease;
}

.lab-pack-list button:hover,
.lab-random:hover {
  padding-right: 10px;
  padding-left: 10px;
  color: var(--blue-light);
}

.lab-pack-list button > span,
.lab-random > span {
  color: var(--blue-light);
  font-family: var(--serif);
  font-size: 11px;
}

.lab-pack-list button strong,
.lab-random strong {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
}

.lab-pack-list button small,
.lab-random small {
  color: rgba(255, 253, 247, 0.5);
  font-size: 9px;
}

.lab-pack-list button i {
  color: var(--blue-light);
  font-style: normal;
}

.lab-random {
  grid-template-columns: 28px minmax(135px, 0.55fr) 1fr;
  margin-top: 12px;
  border-top: 1px dashed rgba(152, 179, 255, 0.4);
}

.lab-topline {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: center;
  margin-bottom: 50px;
}

.lab-topline .lab-progress {
  margin-bottom: 0;
}

.lab-exit {
  padding: 4px 0;
  color: rgba(255, 253, 247, 0.54);
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(255, 253, 247, 0.28);
  cursor: pointer;
  font-size: 9px;
}

.lab-exit:hover {
  color: var(--blue-light);
  border-color: var(--blue-light);
}

.lab-case-label {
  display: block;
  margin-top: 20px;
  color: rgba(255, 253, 247, 0.45);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.lab-option:disabled {
  cursor: default;
  opacity: 0.42;
}

.lab-option.selected,
.lab-option.selected:disabled {
  color: var(--white);
  opacity: 1;
}

.lab-option.selected span:first-child {
  color: var(--night);
  background: var(--blue-light);
  text-align: center;
}

.lab-receipt {
  margin-top: 28px;
  padding: 24px 0 0;
  border-top: 1px solid var(--blue-light);
}

.lab-receipt > span {
  color: var(--blue-light);
  font-size: 9px;
  font-weight: 650;
  letter-spacing: 0.12em;
}

.lab-receipt p {
  margin: 10px 0 20px;
  color: rgba(255, 253, 247, 0.72);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.6;
}

.lab-receipt button {
  padding: 10px 0;
  color: var(--white);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--white);
  cursor: pointer;
  font-size: 11px;
}

.lab-receipt button i {
  margin-left: 8px;
  color: var(--blue-light);
  font-style: normal;
}

.lab-result-axis {
  margin: 28px 0 0;
  color: var(--blue-light) !important;
  font-size: 10px !important;
  font-weight: 650;
  letter-spacing: 0.1em;
}

.lab-result-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.restart-button.quiet {
  color: rgba(255, 253, 247, 0.6);
  border-color: rgba(255, 255, 255, 0.2);
}

@media (max-width: 720px) {
  .lab-pack-list button,
  .lab-random {
    grid-template-columns: 24px 1fr 16px;
  }

  .lab-pack-list button small,
  .lab-random small {
    grid-column: 2 / -1;
  }

  .lab-random strong {
    grid-column: 2 / -1;
  }

  .lab-topline {
    margin-bottom: 38px;
  }

  .lab-progress {
    gap: 6px;
  }

  .lab-progress i {
    width: 28px;
  }

  .lab-question {
    font-size: clamp(26px, 7.6vw, 38px);
  }
}

/* Extended thinker archive */
.dialog-meta-line {
  display: flex;
  gap: 12px 22px;
  align-items: center;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.06em;
}

.dialog-meta-line .dialog-dates {
  color: var(--ink);
}

.dialog-deep-profile {
  margin: 44px 0 8px;
  border-top: 2px solid var(--ink);
}

.dialog-deep-section {
  display: grid;
  grid-template-columns: minmax(115px, 0.28fr) 1fr;
  gap: clamp(26px, 4vw, 58px);
  padding: 27px 0 30px;
  border-bottom: 1px solid var(--line);
}

.dialog-deep-label {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 8px;
  align-content: start;
}

.dialog-deep-label span {
  color: var(--blue);
  font-family: var(--serif);
  font-size: 11px;
}

.dialog-deep-label h3 {
  margin: 0;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.dialog-deep-section > p,
.dialog-deep-section > ol {
  margin: 0;
}

.dialog-deep-section > p {
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(17px, 1.8vw, 22px);
  line-height: 1.72;
}

.dialog-deep-section > ol {
  padding: 0;
  list-style: none;
  counter-reset: argument;
}

.dialog-deep-section > ol li {
  position: relative;
  padding: 0 0 17px 42px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
  counter-increment: argument;
}

.dialog-deep-section > ol li + li {
  padding-top: 17px;
  border-top: 1px dashed var(--line);
}

.dialog-deep-section > ol li::before {
  position: absolute;
  top: 0;
  left: 0;
  color: var(--blue);
  content: counter(argument, decimal-leading-zero);
  font-family: var(--serif);
  font-size: 11px;
}

.dialog-deep-section > ol li + li::before {
  top: 17px;
}

.archive-dialog .dialog-portrait {
  position: sticky;
  top: 70px;
  height: min(650px, calc(100svh - 125px));
  min-height: 0;
  align-self: start;
}

@media (max-width: 980px) {
  .archive-dialog .dialog-portrait {
    position: static;
    height: 480px;
  }
}

@media (max-width: 720px) {
  .dialog-deep-section {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 24px 0 28px;
  }

  .dialog-deep-section > p {
    font-size: 17px;
  }

  .archive-dialog .dialog-portrait {
    height: 340px;
  }
}

.plain-language {
  padding-top: clamp(105px, 12vw, 175px);
  padding-bottom: clamp(110px, 13vw, 190px);
  background: var(--paper-deep);
}

.terms-layout {
  display: grid;
  grid-template-columns: minmax(290px, 0.75fr) minmax(440px, 1fr);
  gap: clamp(60px, 10vw, 160px);
}

.terms-head {
  position: sticky;
  top: 110px;
  align-self: start;
}

.term-list {
  border-top: 1px solid var(--line);
}

.term-item {
  border-bottom: 1px solid var(--line);
}

.term-item summary {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: center;
  padding: 25px 0;
  cursor: pointer;
  list-style: none;
}

.term-item summary::-webkit-details-marker {
  display: none;
}

.term-item summary strong {
  font-family: var(--serif);
  font-size: clamp(23px, 2.4vw, 34px);
  font-weight: 500;
}

.term-item summary span {
  font-size: 20px;
  transition: transform 260ms var(--ease);
}

.term-item[open] summary span {
  transform: rotate(45deg);
}

.term-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  padding: 0 0 30px;
  color: var(--muted);
  font-size: 13px;
}

.term-body p {
  margin: 0;
}

.term-body em {
  color: var(--blue);
  font-style: normal;
  font-weight: 650;
}

.today-section {
  position: relative;
  display: grid;
  min-height: 88svh;
  grid-template-columns: 1fr 1fr;
  color: var(--white);
  background: var(--night);
}

.today-image {
  min-height: 650px;
  overflow: hidden;
}

.today-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 36%;
  filter: grayscale(1) contrast(1.1) brightness(0.65);
  transition: transform 1s var(--ease), filter 600ms ease;
}

.today-section:hover .today-image img {
  filter: grayscale(0.75) contrast(1.05) brightness(0.7);
  transform: scale(1.025);
}

.today-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 90px var(--side) 90px clamp(45px, 6vw, 95px);
}

.today-copy h2 {
  font-size: clamp(42px, 5.2vw, 76px);
}

.today-copy > p:not(.eyebrow) {
  max-width: 500px;
  margin: 32px 0;
  color: rgba(255, 253, 247, 0.61);
  font-size: 14px;
}

.light-action {
  margin-top: 8px;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: center;
  padding: 50px var(--side);
  color: rgba(255, 253, 247, 0.62);
  background: var(--night);
  border-top: 1px solid var(--line-light);
  font-size: 11px;
}

.footer-brand {
  color: var(--white);
}

.credit {
  grid-column: 1 / -1;
  margin: 0;
  color: rgba(255, 253, 247, 0.58);
}

.credit a {
  color: var(--blue-light);
  text-decoration: underline;
  text-decoration-color: rgba(152, 179, 255, 0.45);
  text-underline-offset: 3px;
}

.thinker-dialog {
  width: min(820px, calc(100% - 36px));
  max-height: min(780px, calc(100svh - 36px));
  margin: auto;
  padding: 0;
  color: var(--ink);
  background: var(--paper);
  border: 0;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.35);
}

.thinker-dialog::backdrop {
  background: rgba(9, 11, 12, 0.72);
  backdrop-filter: blur(8px);
}

.dialog-close {
  position: sticky;
  z-index: 2;
  top: 0;
  display: flex;
  width: 100%;
  gap: 12px;
  align-items: center;
  justify-content: flex-end;
  padding: 17px 24px;
  color: var(--muted);
  background: rgba(242, 238, 227, 0.94);
  border: 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.dialog-close span {
  color: var(--blue);
  font-size: 22px;
}

.dialog-person {
  display: grid;
  grid-template-columns: 1fr minmax(190px, 0.44fr);
  gap: 50px;
  padding: clamp(35px, 6vw, 75px);
}

.dialog-person.has-image {
  grid-template-columns: 1fr minmax(210px, 0.6fr);
}

.dialog-person .dialog-era {
  color: var(--blue);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.dialog-person h2 {
  margin: 16px 0 5px;
  font-family: var(--serif);
  font-size: clamp(48px, 7vw, 82px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.05em;
}

.dialog-dates {
  color: var(--muted);
  font-size: 11px;
}

.dialog-core {
  margin: 35px 0;
  font-family: var(--serif);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.35;
}

.dialog-detail {
  display: grid;
  gap: 24px;
}

.dialog-detail div {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.dialog-detail strong {
  display: block;
  margin-bottom: 7px;
  color: var(--blue);
  font-size: 10px;
  letter-spacing: 0.1em;
}

.dialog-detail p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.dialog-portrait {
  align-self: stretch;
  min-height: 420px;
  overflow: hidden;
  background: var(--night);
}

.dialog-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.05);
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 760ms var(--ease), transform 760ms var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (min-width: 981px) {
  .mobile-menu {
    display: none !important;
  }

  body.menu-open {
    overflow: auto;
  }
}

@media (max-width: 980px) {
  .desktop-nav {
    display: none;
  }

  .menu-button {
    display: flex;
  }

  .hero-image-wrap {
    width: 65%;
  }

  .hero-copy {
    width: 78vw;
  }

  .question-layout,
  .terms-layout {
    grid-template-columns: 1fr;
  }

  .question-heading,
  .terms-head {
    position: static;
  }

  .question-list {
    margin-top: 20px;
  }

  .timeline-shell {
    grid-template-columns: 150px 1fr;
  }

  .era-rail {
    padding-left: 25px;
  }

  .era-nav-button::before {
    left: -25px;
  }

  .era-header {
    grid-template-columns: 1fr;
  }

  .thinker-row {
    grid-template-columns: 36px 140px 1fr 24px;
  }

  .thinker-dates {
    display: none;
  }

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

  .lab-aside {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .lab-aside .section-label {
    grid-column: 1 / -1;
    margin-bottom: 15px;
  }

  .today-section {
    grid-template-columns: 0.82fr 1.18fr;
  }
}

@media (max-width: 720px) {
  .site-header {
    height: 68px;
  }

  .brand {
    font-size: 13px;
  }

  .hero {
    min-height: 780px;
  }

  .hero-image-wrap {
    top: 0;
    width: 100%;
    height: 58%;
  }

  .hero-image {
    object-position: 52% 22%;
  }

  .hero-veil {
    background: linear-gradient(0deg, var(--night) 0%, rgba(20, 23, 25, 0.58) 40%, rgba(20, 23, 25, 0.12) 100%),
      linear-gradient(90deg, rgba(20, 23, 25, 0.4), transparent);
  }

  .hero-copy {
    align-self: end;
    width: 100%;
    padding: 290px var(--side) 95px;
  }

  .hero h1 {
    font-size: clamp(45px, 13vw, 62px);
  }

  .hero-intro {
    margin-top: 23px;
    font-size: 14px;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    margin-top: 28px;
  }

  .hero-caption {
    display: none;
  }

  .scroll-cue {
    bottom: 20px;
  }

  .question-index,
  .timeline-intro,
  .duel-section,
  .relay-copy,
  .lab-section,
  .plain-language {
    padding-top: 88px;
    padding-bottom: 95px;
  }

  .section-label {
    margin-bottom: 50px;
  }

  .question-list a {
    grid-template-columns: 31px 1fr;
    gap: 12px;
    padding: 22px 0;
  }

  .question-list small {
    grid-column: 2;
  }

  .timeline-title-row,
  .duel-head,
  .relay-heading {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .timeline-shell {
    display: block;
  }

  .era-rail {
    z-index: 5;
    top: 66px;
    display: flex;
    height: auto;
    gap: 18px;
    align-items: center;
    padding: 12px var(--side);
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line-light);
    scrollbar-width: none;
  }

  .era-rail::-webkit-scrollbar {
    display: none;
  }

  .era-rail > p {
    display: none;
  }

  #era-nav {
    display: flex;
    gap: 8px;
  }

  .era-nav-button {
    display: block;
    flex: 0 0 auto;
    padding: 8px 11px;
    border: 1px solid var(--line-light);
  }

  .era-nav-button span,
  .era-nav-button small {
    display: none;
  }

  .era-nav-button::before {
    display: none;
  }

  .era-nav-button.active {
    color: var(--night);
    background: var(--blue-light);
    border-color: var(--blue-light);
  }

  .era-chapter {
    min-height: 0;
    padding: 78px var(--side) 95px;
    scroll-margin-top: 126px;
  }

  .era-header {
    padding-bottom: 38px;
  }

  .era-header h3 {
    font-size: clamp(45px, 13vw, 67px);
  }

  .thinker-row {
    grid-template-columns: 30px 1fr 20px;
    gap: 10px;
    padding: 18px 0;
  }

  .thinker-thesis {
    grid-column: 2 / -1;
    padding-right: 18px;
  }

  .thinker-arrow {
    grid-column: 3;
    grid-row: 1;
  }

  .bridge-note {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .duel-tabs {
    margin-top: 48px;
  }

  .duel-stage {
    grid-template-columns: 1fr;
  }

  .duel-side,
  .duel-side:first-child,
  .duel-side:last-child {
    padding: 44px 0;
  }

  .duel-side + .duel-side {
    border-top: 1px solid var(--line);
  }

  .duel-vs {
    display: none;
  }

  .relay-lines {
    padding-top: 55px;
    padding-bottom: 95px;
  }

  .relay-route {
    grid-template-columns: 1fr auto;
    gap: 16px;
  }

  .relay-route > span:first-child {
    grid-column: 1 / -1;
  }

  .relay-nodes {
    grid-column: 1;
  }

  .relay-expand {
    grid-column: 2;
    grid-row: 2;
  }

  .relay-explanation {
    padding: 0 0 26px;
  }

  .lab-aside {
    display: block;
  }

  .lab-aside .section-label {
    margin-bottom: 50px;
  }

  .lab-console {
    min-height: 560px;
    margin-right: calc(var(--side) * -1);
    margin-left: calc(var(--side) * -1);
    padding: 38px var(--side);
  }

  .term-body {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .today-section {
    display: block;
    min-height: 0;
  }

  .today-image {
    height: 58svh;
    min-height: 430px;
  }

  .today-copy {
    padding: 70px var(--side) 90px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    padding-top: 42px;
  }

  .dialog-person,
  .dialog-person.has-image {
    grid-template-columns: 1fr;
  }

  .dialog-portrait {
    min-height: 330px;
    grid-row: 1;
  }
}

.people-section {
  padding-top: clamp(105px, 12vw, 175px);
  padding-bottom: clamp(110px, 12vw, 180px);
  background: var(--paper-deep);
}

.people-heading,
.sources-heading {
  display: grid;
  grid-template-columns: minmax(420px, 1.1fr) minmax(260px, 0.5fr);
  gap: 9vw;
  align-items: end;
}

.people-heading h2,
.sources-heading h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(42px, 5.3vw, 78px);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.05em;
}

.people-heading > p,
.sources-heading > p {
  max-width: 430px;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 14px;
}

.people-tools {
  margin-top: 72px;
  padding: 30px 0 22px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.people-tools > label {
  display: block;
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.people-search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 25px;
  align-items: end;
}

#people-search {
  width: 100%;
  padding: 8px 0 15px;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 2px solid var(--ink);
  border-radius: 0;
  font-family: var(--serif);
  font-size: clamp(23px, 2.4vw, 34px);
  outline: 0;
  appearance: none;
}

#people-search:focus {
  border-color: var(--blue);
}

#people-search::placeholder {
  color: rgba(23, 25, 26, 0.35);
}

#people-count {
  padding-bottom: 15px;
  color: var(--blue);
  font-family: var(--serif);
  font-size: 18px;
  white-space: nowrap;
}

.people-filters {
  display: flex;
  gap: 8px;
  margin-top: 22px;
  padding-bottom: 3px;
  overflow-x: auto;
  scrollbar-width: none;
}

.people-filters::-webkit-scrollbar {
  display: none;
}

.people-filter {
  flex: 0 0 auto;
  padding: 9px 12px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  font-size: 11px;
}

.people-filter span {
  margin-left: 7px;
  font-family: var(--serif);
}

.people-filter:hover,
.people-filter.active {
  color: var(--white);
  background: var(--ink);
  border-color: var(--ink);
}

.people-results {
  display: grid;
  max-height: 760px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 30px;
  overflow-y: auto;
  border-top: 1px solid var(--line);
  scrollbar-color: var(--blue) transparent;
  scrollbar-width: thin;
}

.person-index-row {
  display: grid;
  grid-template-columns: 36px minmax(140px, 0.48fr) minmax(200px, 1fr) 20px;
  gap: 16px;
  align-items: center;
  padding: 20px 17px 20px 0;
  color: var(--ink);
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  transition: color 220ms ease, padding 250ms var(--ease), background 220ms ease;
}

.person-index-row:nth-child(odd) {
  padding-right: 25px;
  border-right: 1px solid var(--line);
}

.person-index-row:nth-child(even) {
  padding-left: 25px;
}

.person-index-row:hover {
  padding-right: 20px;
  padding-left: 12px;
  color: var(--blue);
  background: rgba(255, 255, 255, 0.25);
}

.person-index-era {
  color: var(--blue);
  font-family: var(--serif);
  font-size: 11px;
}

.person-index-name {
  display: grid;
  gap: 3px;
}

.person-index-name strong {
  font-family: var(--serif);
  font-size: clamp(19px, 1.8vw, 27px);
  font-weight: 500;
  line-height: 1.15;
}

.person-index-name small {
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.05em;
}

.person-index-thesis {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.person-index-open {
  font-size: 15px;
}

.people-empty {
  grid-column: 1 / -1;
  min-height: 220px;
  margin: 0;
  padding: 70px 0;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 25px;
  text-align: center;
}

.era-meta b {
  margin-left: auto;
  color: rgba(255, 253, 247, 0.58);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.sources-section {
  padding-top: clamp(105px, 12vw, 175px);
  padding-bottom: clamp(110px, 12vw, 180px);
  background: var(--paper);
}

.source-list {
  margin-top: 78px;
  border-top: 1px solid var(--line);
}

.source-row {
  display: grid;
  grid-template-columns: 45px minmax(240px, 0.72fr) 1fr 24px;
  gap: 28px;
  align-items: center;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  transition: color 220ms ease, padding 250ms var(--ease);
}

.source-row:hover {
  padding-right: 12px;
  padding-left: 12px;
  color: var(--blue);
}

.source-row > span {
  color: var(--blue);
  font-family: var(--serif);
  font-size: 12px;
}

.source-row strong {
  font-family: var(--serif);
  font-size: clamp(20px, 2vw, 29px);
  font-weight: 500;
  line-height: 1.2;
}

.source-row strong small {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 10px;
  font-weight: 500;
}

.source-row p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.source-row i {
  color: var(--blue);
  font-style: normal;
}

.thinker-dialog {
  width: min(1080px, calc(100% - 36px));
  max-height: min(860px, calc(100svh - 32px));
}

.archive-dialog,
.archive-dialog.has-image {
  grid-template-columns: minmax(0, 1fr) minmax(230px, 0.43fr);
  gap: clamp(40px, 6vw, 80px);
  padding: clamp(34px, 5vw, 70px);
}

.archive-dialog:not(.has-image) {
  grid-template-columns: 1fr;
}

.dialog-main {
  min-width: 0;
}

.archive-dialog .dialog-bio {
  margin: 0 0 38px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.9;
}

.archive-dialog .dialog-core {
  margin-bottom: 22px;
}

.dialog-block {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.dialog-block h3 {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.11em;
}

.dialog-block p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

.concept-list {
  display: flex;
  gap: 10px 0;
  flex-wrap: wrap;
}

.concept-list span {
  color: var(--ink);
  font-size: 12px;
}

.concept-list span:not(:last-child)::after {
  margin: 0 11px;
  color: var(--blue);
  content: "·";
}

.works-block {
  margin-top: 24px;
}

.works-block ol {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 25px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: works;
}

.works-block li {
  position: relative;
  padding-left: 28px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  counter-increment: works;
}

.works-block li::before {
  position: absolute;
  left: 0;
  color: var(--blue);
  content: counter(works, decimal-leading-zero);
  font-family: var(--sans);
  font-size: 9px;
}

.dialog-quote {
  margin: 32px 0;
  padding: 28px clamp(24px, 4vw, 42px);
  color: var(--white);
  background: var(--night);
}

.dialog-quote p {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(21px, 2.8vw, 34px);
  line-height: 1.35;
}

.dialog-quote footer {
  margin-top: 16px;
  color: var(--blue-light);
  font-size: 10px;
  letter-spacing: 0.06em;
}

.dialog-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.dialog-footer-row {
  display: grid;
  gap: 24px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.dialog-footer-row > a {
  color: var(--blue);
  font-size: 12px;
  font-weight: 650;
}

.related-people {
  display: flex;
  gap: 8px 12px;
  align-items: center;
  flex-wrap: wrap;
}

.related-people > span {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.1em;
}

.related-people button {
  padding: 4px 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  font-size: 12px;
}

.related-people button:hover {
  color: var(--blue);
  border-color: var(--blue);
}

@media (max-width: 980px) {
  .people-heading,
  .sources-heading {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .people-results {
    grid-template-columns: 1fr;
  }

  .person-index-row:nth-child(odd),
  .person-index-row:nth-child(even) {
    padding-right: 0;
    padding-left: 0;
    border-right: 0;
  }

  .person-index-row:hover {
    padding-right: 10px;
    padding-left: 10px;
  }

  .source-row {
    grid-template-columns: 38px minmax(220px, 0.7fr) 1fr 20px;
    gap: 18px;
  }

  .archive-dialog,
  .archive-dialog.has-image {
    grid-template-columns: 1fr;
  }

  .archive-dialog .dialog-portrait {
    min-height: 440px;
    grid-row: 1;
  }
}

@media (max-width: 720px) {
  .hero h1 {
    font-size: clamp(41px, 11.7vw, 56px);
  }

  .people-section,
  .sources-section {
    padding-top: 88px;
    padding-bottom: 95px;
  }

  .people-tools {
    margin-top: 50px;
  }

  .people-search-row {
    gap: 12px;
  }

  #people-search {
    font-size: 21px;
  }

  .people-results {
    max-height: 740px;
  }

  .person-index-row {
    grid-template-columns: 27px 1fr 20px;
    gap: 9px;
    padding: 17px 0;
  }

  .person-index-thesis {
    grid-column: 2 / -1;
    padding-right: 18px;
  }

  .person-index-open {
    grid-column: 3;
    grid-row: 1;
  }

  .source-list {
    margin-top: 52px;
  }

  .source-row {
    grid-template-columns: 28px 1fr 18px;
    gap: 12px;
  }

  .source-row p {
    grid-column: 2 / -1;
  }

  .source-row i {
    grid-column: 3;
    grid-row: 1;
  }

  .archive-dialog,
  .archive-dialog.has-image {
    padding: 30px 24px 45px;
  }

  .archive-dialog .dialog-portrait {
    min-height: 330px;
  }

  .works-block ol,
  .dialog-columns {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal,
  .reveal-on-load {
    opacity: 1;
    transform: none;
  }
}

/* Concept atlas */
.concept-heading {
  display: grid;
  grid-template-columns: minmax(420px, 1.1fr) minmax(280px, 0.5fr);
  gap: 9vw;
  align-items: end;
}

.concept-heading h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(46px, 6vw, 86px);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.concept-heading > p {
  max-width: 460px;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 14px;
}

.concept-tools {
  margin-top: 78px;
  padding: 28px 0 22px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.concept-tools > label {
  display: block;
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.concept-search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: end;
}

#concept-search {
  width: 100%;
  padding: 8px 0 14px;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 2px solid var(--ink);
  border-radius: 0;
  outline: 0;
  font-family: var(--serif);
  font-size: clamp(23px, 2.5vw, 36px);
  appearance: none;
}

#concept-search:focus {
  border-color: var(--blue);
}

#concept-search::placeholder {
  color: rgba(23, 25, 26, 0.34);
}

#concept-count {
  padding-bottom: 14px;
  color: var(--blue);
  font-family: var(--serif);
  font-size: 18px;
  white-space: nowrap;
}

.concept-filters {
  display: flex;
  gap: 8px;
  margin-top: 22px;
  padding-bottom: 3px;
  overflow-x: auto;
  scrollbar-width: none;
}

.concept-filters::-webkit-scrollbar {
  display: none;
}

.concept-filter {
  flex: 0 0 auto;
  padding: 9px 12px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  font-size: 11px;
}

.concept-filter span {
  margin-left: 7px;
  color: var(--blue);
  font-family: var(--serif);
}

.concept-filter:hover,
.concept-filter.active {
  color: var(--white);
  background: var(--ink);
  border-color: var(--ink);
}

.concept-filter.active span {
  color: var(--blue-light);
}

.concept-workbench {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(340px, 0.85fr);
  margin-top: 48px;
  border: 1px solid rgba(23, 25, 26, 0.25);
  background: var(--white);
}

.concept-map-column {
  min-width: 0;
  color: var(--white);
  background: var(--night);
  border-right: 1px solid var(--line);
}

.concept-map-key {
  display: flex;
  gap: 24px;
  align-items: center;
  min-height: 48px;
  padding: 0 24px;
  color: rgba(255, 253, 247, 0.56);
  border-bottom: 1px solid var(--line-light);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.concept-map-key span {
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.concept-map-key i {
  width: 28px;
  height: 0;
  border-top: 1px solid var(--blue-light);
}

.concept-map-key i.dashed {
  border-top-style: dashed;
}

.concept-map {
  position: relative;
  min-height: 900px;
  overflow: hidden;
  isolation: isolate;
}

.concept-map::before {
  position: absolute;
  inset: 0;
  z-index: -2;
  content: "";
  opacity: 0.22;
  background-image: linear-gradient(rgba(152, 179, 255, 0.16) 1px, transparent 1px), linear-gradient(90deg, rgba(152, 179, 255, 0.16) 1px, transparent 1px);
  background-size: 34px 34px;
}

.concept-lines {
  position: absolute;
  z-index: -1;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.concept-edge path {
  fill: none;
  stroke: rgba(152, 179, 255, 0.22);
  stroke-width: 1;
}

.concept-edge.dashed path {
  stroke-dasharray: 5 5;
}

.concept-edge.active path {
  stroke: var(--blue-light);
  stroke-width: 1.8;
}

.concept-edge text {
  fill: var(--blue-light);
  stroke: var(--night);
  stroke-width: 5px;
  paint-order: stroke;
  font-family: var(--sans);
  font-size: 9px;
  letter-spacing: 0.06em;
}

.concept-clusters {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  padding: 20px;
}

.concept-cluster {
  min-width: 0;
  padding: 25px 22px 30px;
  border-bottom: 1px solid var(--line-light);
}

.concept-cluster:nth-child(odd) {
  border-right: 1px solid var(--line-light);
}

.concept-cluster:only-child {
  grid-column: 1 / -1;
  border-right: 0;
}

.concept-cluster header {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  min-height: 76px;
  align-items: start;
}

.concept-cluster header > span {
  color: var(--blue-light);
  font-family: var(--serif);
  font-size: 12px;
}

.concept-cluster h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(20px, 2vw, 27px);
  font-weight: 500;
  line-height: 1.15;
}

.concept-cluster header p {
  margin: 6px 0 0;
  color: rgba(255, 253, 247, 0.5);
  font-size: 9px;
}

.concept-nodes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.concept-cluster:only-child .concept-nodes {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.concept-node {
  position: relative;
  display: grid;
  min-height: 54px;
  grid-template-columns: 22px 1fr;
  gap: 7px;
  align-items: center;
  padding: 10px;
  color: rgba(255, 253, 247, 0.82);
  text-align: left;
  background: rgba(20, 23, 25, 0.9);
  border: 1px solid rgba(255, 253, 247, 0.2);
  cursor: pointer;
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.concept-node:hover {
  color: var(--white);
  border-color: var(--blue-light);
  transform: translateY(-2px);
}

.concept-node.selected {
  color: var(--night);
  background: var(--blue-light);
  border-color: var(--blue-light);
}

.concept-node small {
  color: var(--blue-light);
  font-family: var(--serif);
  font-size: 9px;
}

.concept-node.selected small {
  color: var(--blue);
}

.concept-node strong {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.15;
}

.concept-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 90px 20px;
  color: rgba(255, 253, 247, 0.6);
  font-family: var(--serif);
  font-size: 22px;
  text-align: center;
}

.concept-detail {
  position: sticky;
  top: 66px;
  align-self: start;
  min-height: 948px;
  max-height: calc(100svh - 66px);
  padding: clamp(30px, 4vw, 58px);
  overflow-y: auto;
  background: var(--white);
  scrollbar-color: var(--blue) transparent;
  scrollbar-width: thin;
}

.concept-detail-meta {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.concept-detail-meta span {
  color: var(--blue);
  font-family: var(--serif);
  font-size: 14px;
}

.concept-detail-meta p {
  margin: 0;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.04em;
}

.concept-detail h3 {
  margin: 32px 0 8px;
  font-family: var(--serif);
  font-size: clamp(45px, 5vw, 72px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.05em;
}

.concept-question {
  margin: 0 0 34px;
  color: var(--blue);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.45;
}

.concept-detail-block {
  padding: 21px 0;
  border-top: 1px solid var(--line);
}

.concept-detail-block > strong,
.concept-related > strong {
  display: block;
  margin-bottom: 9px;
  color: var(--blue);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.concept-detail-block p,
.concept-detail-block ol {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.78;
}

.concept-plain p {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.65;
}

.concept-detail-block ol {
  padding-left: 20px;
}

.concept-detail-block li {
  padding-left: 5px;
}

.concept-detail-block li::marker {
  color: var(--blue);
  font-family: var(--serif);
}

.concept-detail-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.concept-thinkers p {
  color: var(--ink);
}

.concept-related {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.concept-related > div {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}

.concept-related button {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  padding: 7px 9px;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  font-size: 10px;
}

.concept-related button span {
  color: var(--blue);
  font-size: 8px;
}

.concept-related button:hover {
  color: var(--white);
  background: var(--ink);
  border-color: var(--ink);
}

.concept-detail-empty {
  margin: 0;
  padding-top: 50px;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 22px;
}

.concept-index-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: end;
  margin-top: 100px;
  padding-bottom: 22px;
  border-bottom: 2px solid var(--ink);
}

.concept-index-head p {
  margin-bottom: 0;
}

.concept-index-head p:last-child {
  color: var(--muted);
  font-size: 12px;
  text-align: right;
}

.concept-index-group {
  display: grid;
  grid-template-columns: minmax(190px, 0.32fr) 1fr;
  border-bottom: 1px solid var(--line);
}

.concept-index-group > header {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 12px;
  align-content: start;
  padding: 28px 30px 28px 0;
  border-right: 1px solid var(--line);
}

.concept-index-group > header span {
  color: var(--blue);
  font-family: var(--serif);
  font-size: 12px;
}

.concept-index-group > header h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 25px;
  font-weight: 500;
  line-height: 1.2;
}

.concept-index-row {
  display: grid;
  width: 100%;
  grid-template-columns: 36px minmax(135px, 0.28fr) 1fr 18px;
  gap: 15px;
  align-items: start;
  padding: 22px 0 22px 28px;
  color: var(--ink);
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}

.concept-index-row:last-child {
  border-bottom: 0;
}

.concept-index-row > span {
  color: var(--blue);
  font-family: var(--serif);
  font-size: 11px;
}

.concept-index-row strong {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
  line-height: 1.2;
}

.concept-index-row p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.7;
}

.concept-index-row i {
  color: var(--blue);
  font-style: normal;
}

.concept-index-row:hover,
.concept-index-row.selected {
  background: rgba(47, 103, 255, 0.06);
}

.concept-index-row:hover strong,
.concept-index-row.selected strong {
  color: var(--blue);
}

@media (max-width: 1100px) {
  .concept-workbench {
    grid-template-columns: minmax(0, 1fr) minmax(310px, 0.72fr);
  }

  .concept-clusters {
    grid-template-columns: 1fr;
  }

  .concept-cluster:nth-child(odd) {
    border-right: 0;
  }

  .concept-cluster:only-child .concept-nodes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 880px) {
  .concept-heading,
  .concept-workbench {
    grid-template-columns: 1fr;
  }

  .concept-heading {
    gap: 28px;
  }

  .concept-map-column {
    border-right: 0;
  }

  .concept-detail {
    position: static;
    min-height: 0;
    max-height: none;
    overflow: visible;
    border-top: 1px solid var(--line);
  }

  .concept-index-group {
    grid-template-columns: 170px 1fr;
  }

  .concept-index-row {
    grid-template-columns: 30px minmax(115px, 0.35fr) 1fr 16px;
  }
}

@media (max-width: 720px) {
  .concept-tools {
    margin-top: 50px;
  }

  #concept-search {
    font-size: 21px;
  }

  .concept-map {
    min-height: 0;
  }

  .concept-lines,
  .concept-map-key {
    display: none;
  }

  .concept-clusters {
    grid-template-columns: 1fr;
    padding: 8px 18px 20px;
  }

  .concept-cluster {
    padding: 25px 0 30px;
  }

  .concept-cluster:nth-child(odd) {
    border-right: 0;
  }

  .concept-nodes,
  .concept-cluster:only-child .concept-nodes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .concept-detail {
    padding: 34px 22px 42px;
  }

  .concept-detail-pair {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .concept-index-head {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 76px;
  }

  .concept-index-head p:last-child {
    text-align: left;
  }

  .concept-index-group {
    display: block;
  }

  .concept-index-group > header {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .concept-index-row {
    grid-template-columns: 28px 1fr 16px;
    gap: 10px;
    padding: 18px 0;
  }

  .concept-index-row p {
    grid-column: 2 / -1;
    padding-right: 20px;
  }

  .concept-index-row i {
    grid-column: 3;
    grid-row: 1;
  }
}

.dialog-era-context {
  display: grid;
  grid-template-columns: minmax(115px, 0.28fr) 1fr;
  gap: clamp(26px, 4vw, 58px);
  margin: 34px 0 0;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.dialog-era-context strong {
  color: var(--blue);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.dialog-era-context p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.dialog-footer-row .related-people {
  display: grid;
  gap: 12px;
  align-items: start;
}

.dialog-footer-row .related-people > span {
  color: var(--blue);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.dialog-footer-row .related-people > div {
  display: grid;
  border-top: 1px solid var(--line);
}

.dialog-footer-row .related-people button {
  display: grid;
  width: 100%;
  grid-template-columns: minmax(115px, 0.28fr) 1fr;
  gap: 24px;
  padding: 14px 0;
  text-align: left;
  border: 0;
  border-bottom: 1px solid var(--line);
}

.dialog-footer-row .related-people button strong {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 500;
}

.dialog-footer-row .related-people button small {
  color: var(--muted);
  font-size: 10px;
  line-height: 1.6;
}

.dialog-footer-row .related-people button:hover strong,
.dialog-footer-row .related-people button:hover small {
  color: var(--blue);
}

@media (max-width: 720px) {
  .dialog-era-context,
  .dialog-footer-row .related-people button {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}

.thinker-name {
  display: grid;
  gap: 4px;
}

.thinker-name small {
  color: rgba(255, 253, 247, 0.45);
  font-family: var(--sans);
  font-size: 8px;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: 0.04em;
}

.thinker-row:hover .thinker-name small {
  color: var(--blue-light);
}

.person-index-name strong {
  display: flex;
  gap: 5px 10px;
  align-items: baseline;
  flex-wrap: wrap;
}

.person-index-name strong em {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 9px;
  font-style: normal;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0.03em;
}

.person-index-row:hover .person-index-name strong em {
  color: var(--blue);
}

.dialog-name-row {
  display: flex;
  gap: 10px 22px;
  align-items: baseline;
  flex-wrap: wrap;
}

.dialog-name-row > span {
  color: var(--blue);
  font-family: var(--serif);
  font-size: clamp(16px, 2vw, 24px);
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.dialog-footer-row .related-people button strong em {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 8px;
  font-style: normal;
  font-weight: 500;
  line-height: 1.35;
}

@media (max-width: 720px) {
  .dialog-name-row {
    display: block;
  }

  .dialog-name-row > span {
    display: block;
    margin: 8px 0 3px;
  }
}