@font-face {
  font-family: Exhibit;
  src: url('assets/exhibit.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
}
:root {
  color-scheme: dark;
  --site-nav-height: 65px;
  --ink: #030b0d;
  --panel: #101b1d;
  --text: #edf3f1;
  --sub: #b5c6c5;
  --mint: #a7e4d7;
  --line: #adcec438;
  --wrap: 1280px;
  --side: clamp(24px, 7vw, 112px);
  --sans: Inter, Exhibit, 'Noto Sans CJK SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --mono: 'IBM Plex Mono', Consolas, 'Liberation Mono', monospace;
}
* {
  box-sizing: border-box;
}
html {
  background: var(--ink);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--site-nav-height) + 14px);
  scrollbar-color: #47615d var(--ink);
}
body {
  margin: 0;
  background: transparent;
  color: var(--text);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  isolation: isolate;
}
body:has(dialog[open]) {
  overflow: hidden;
}
h1,
h2,
h3,
p {
  margin: 0;
}
img {
  display: block;
  max-width: 100%;
}
svg {
  display: block;
}
button,
input,
select {
  font: inherit;
}
button,
a {
  -webkit-tap-highlight-color: transparent;
}
button {
  color: inherit;
  cursor: pointer;
}
a {
  color: inherit;
  text-decoration: none;
}
button:focus-visible,
a:focus-visible,
summary:focus-visible,
input:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 5px;
}
::selection {
  background: #a1dbce;
  color: #081617;
}
.icons {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}
.ico {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.wrap {
  width: calc(100% - 2 * var(--side));
  max-width: var(--wrap);
  margin-inline: auto;
}
.skip-link {
  position: fixed;
  top: -150px;
  left: 12px;
  z-index: 20;
  padding: 10px 16px;
  background: var(--mint);
  color: #102420;
}
.skip-link:focus {
  top: 12px;
}

/* One fixed photographic layer persists beneath every page section. */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background: #02080a;
  contain: strict;
}
.vortex-plane {
  position: absolute;
  left: 0;
  top: 0;
  width: max(112vw, 179vh);
  aspect-ratio: 16/9;
  transform: translate(72vw, 48vh) translate(-50%, -50%);
  will-change: transform;
  --feather-x: linear-gradient(to right, transparent, #000 13%, #000 88%, transparent);
  --feather-y: linear-gradient(to bottom, transparent, #000 14%, #000 87%, transparent);
  -webkit-mask-image: var(--feather-x), var(--feather-y);
  -webkit-mask-composite: source-in;
  mask-image: var(--feather-x), var(--feather-y);
  mask-composite: intersect;
}
.vortex-plane video,
.vortex-plane img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  user-select: none;
}
.atmosphere-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, #02080aeb 0%, #02080a9c 27%, transparent 65%);
}
#field-traces {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.hero {
  position: relative;
  display: grid;
  min-height: 100vh;
  min-height: 100svh;
  align-items: center;
}
.hero-layout {
  padding-block: clamp(70px, 10vh, 140px);
}
.hero-copy {
  position: relative;
  width: fit-content;
  max-width: 60%;
}
.exhibit-type {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #b1d7cf;
  font-size: clamp(13px, 1.2vw, 18px);
  font-weight: 500;
  letter-spacing: 0.14em;
  margin-bottom: clamp(24px, 3.6vh, 40px);
}
.exhibit-type i {
  width: 0.52em;
  height: 0.52em;
  border-radius: 50%;
  background: var(--mint);
}
.hero h1 {
  font-size: clamp(66px, 7.7vw, 128px);
  line-height: 1.12;
  letter-spacing: -0.042em;
  font-weight: 700;
  color: #edf3f2;
}
.hero h1 span {
  display: inline-block;
  color: #c4e9e3;
}
.hero-copy p {
  margin-top: clamp(24px, 3.4vh, 40px);
  color: #b7c8c8;
  font-size: clamp(15px, 1.38vw, 22px);
  letter-spacing: 0.03em;
  line-height: 1.9;
  text-wrap: pretty;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 12;
  width: 100%;
  color: var(--text);
  font-family: var(--sans);
  background: #031012bf;
  -webkit-backdrop-filter: blur(15px);
  backdrop-filter: blur(15px);
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
  min-height: var(--site-nav-height);
}
.brand,
.foot-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.brand img {
  width: 34px;
  height: 34px;
}
.brand strong {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.045em;
}
.main-nav {
  display: flex;
  align-items: stretch;
  gap: clamp(18px, 2.8vw, 40px);
}
.main-nav a {
  font-size: 14px;
  color: var(--sub);
  padding-block: 10px;
  white-space: nowrap;
}
.main-nav a:hover,
.main-nav a[aria-current] {
  color: var(--mint);
}
main,
footer {
  position: relative;
}
.model-section {
  padding: clamp(52px, 7vw, 105px) 0 clamp(34px, 5vw, 76px);
}
.section-intro {
  margin-bottom: 25px;
  font-size: clamp(31px, 3.15vw, 46px);
  font-weight: 620;
  letter-spacing: -0.03em;
  line-height: 1.25;
}
.model-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.exhibit-card {
  display: block;
  min-width: 0;
  padding: 0;
  text-align: left;
  overflow: hidden;
  background: #071315c9;
  border: 1px solid var(--line);
  border-radius: 12px;
  transition: border-color 0.25s;
}
.exhibit-card:hover {
  border-color: #82afa3;
}
.model-image {
  aspect-ratio: 2.45;
  overflow: hidden;
  position: relative;
}
.model-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s cubic-bezier(0.2, 0.7, 0.3, 1);
}
.exhibit-card:hover img {
  transform: scale(1.035);
}
.model-card-body {
  padding: 20px 24px 22px;
}
.model-name {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 3px 14px;
}
.model-name h3 {
  font-size: 24px;
  line-height: 1.4;
  font-weight: 580;
}
.model-name span {
  font-size: 12px;
  color: #aac0be;
}
.model-card-body p {
  color: var(--sub);
  font-size: 14px;
  margin-top: 9px;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--mint);
  font-size: 13px;
  margin-top: 15px;
}
.card-link .ico {
  width: 15px;
  height: 15px;
}
.foot-row {
  border-top: 1px solid var(--line);
  display: flex;
  gap: 24px;
  align-items: center;
  min-height: 84px;
  color: #a7bcba;
  font-size: 12px;
}
.foot-brand {
  font-size: 14px;
  color: #d6e6e0;
  gap: 9px;
}
.back-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.back-top .ico {
  width: 15px;
  height: 15px;
}
@media (max-width: 720px) {
  :root {
    --side: clamp(21px, 6.4vw, 38px);
    --site-nav-height: 59px;
  }
  .vortex-plane {
    width: max(153vw, 124svh);
    transform: translate(59vw, 68svh) translate(-50%, -50%);
  }
  .atmosphere-shade {
    background: linear-gradient(175deg, #02080aab 0%, #02080a38 40%, transparent 63%);
  }
  .hero {
    align-items: start;
  }
  .hero-layout {
    padding-top: clamp(74px, 16svh, 156px);
    padding-bottom: 65px;
  }
  .hero-copy {
    max-width: 100%;
  }
  .exhibit-type {
    margin-bottom: 24px;
    gap: 9px;
    font-size: 13px;
  }
  .hero h1 {
    font-size: clamp(51px, 12.8vw, 82px);
    letter-spacing: -0.034em;
  }
  .hero-copy p {
    max-width: 27em;
    margin-top: 22px;
    font-size: clamp(13px, 3.45vw, 17px);
  }
  .header-row {
    min-height: var(--site-nav-height);
    gap: 10px;
  }
  .brand {
    gap: 6px;
  }
  .brand img {
    width: 26px;
    height: 26px;
  }
  .brand strong {
    font-size: 14px;
    letter-spacing: 0;
  }
  .main-nav {
    gap: 12px;
  }
  .main-nav a {
    font-size: 12px;
  }
  .model-section {
    padding: 50px 0 32px;
  }
  .model-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .model-name h3 {
    font-size: 21px;
  }
  .model-card-body {
    padding: 17px;
  }
  .model-card-body p {
    font-size: 13px;
  }
  .foot-row {
    gap: 10px;
    min-height: 70px;
  }
  .foot-row > span {
    display: none;
  }
}
@media (max-width: 450px) {
  .header-row {
    width: calc(100% - 24px);
    gap: 8px;
  }
  .main-nav {
    gap: 6px;
  }
}
@media (max-width: 374px) {
  .brand img {
    display: none;
  }
}
@media (max-width: 360px) {
  .header-row {
    width: calc(100% - 16px);
    gap: 6px;
  }
  .brand strong {
    font-size: 13px;
  }
  .main-nav {
    gap: 4px;
  }
}
@media (max-height: 540px) and (orientation: landscape) {
  .hero-layout {
    padding-block: calc(var(--site-nav-height) + 20px) 28px;
  }
  .hero h1 {
    font-size: clamp(44px, 13vh, 66px);
  }
  .hero-copy {
    max-width: 65%;
  }
  .exhibit-type {
    margin-bottom: 14px;
  }
  .hero-copy p {
    font-size: 13px;
    margin-top: 14px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* A single continuous rail keeps documents and present-day instruments in chronological order. */
.history-section {
  min-height: calc(100svh - var(--site-nav-height) - 68px);
  padding-block: clamp(38px, 4vw, 72px) clamp(46px, 6vw, 96px);
}
.history-track {
  --stop-gap: clamp(22px, 2.6vw, 42px);
  display: grid;
  position: relative;
  grid-auto-flow: column;
  grid-auto-columns: calc((100% - 2 * var(--stop-gap)) / 3);
  align-items: start;
  gap: var(--stop-gap);
  list-style: none;
  padding: 4px 1px 23px;
  margin: 0;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
  scrollbar-color: #60857e #132022;
}
.history-track:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 6px;
}
.history-stop {
  position: relative;
  min-width: 0;
  scroll-snap-align: start;
}
.history-stop time {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #c0e6dc;
  font: 550 clamp(23px, 2.4vw, 37px) / 1.3 var(--sans);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.035em;
}
.history-stop time::before {
  content: '';
  width: 7px;
  height: 7px;
  flex: none;
  background: #92c9bb;
  border-radius: 50%;
}
.history-stop time::after {
  content: '';
  flex: 1;
  height: 1px;
  margin-right: calc(0px - var(--stop-gap));
  background: #8ab7b066;
}
.history-stop:last-child time::after {
  margin-right: 0;
}
.history-stop figure {
  margin: 17px 0 0;
}
.history-stop img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
  border-radius: 6px;
  background: #172324;
}
.history-stop figcaption {
  font-size: 12px;
  line-height: 1.6;
  color: #b0c5c0;
  margin-top: 8px;
}
.history-stop h2 {
  font-size: clamp(19px, 1.65vw, 25px);
  line-height: 1.45;
  font-weight: 610;
  letter-spacing: -0.015em;
  margin: 18px 0 8px;
}
.history-stop > p {
  color: #c1cfcd;
  font-size: 15px;
  line-height: 1.85;
}
.history-tools {
  margin-top: 14px;
  display: grid;
  align-items: start;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
}
.history-arrows {
  display: flex;
  gap: 8px;
}
.history-arrows[hidden] {
  display: none;
}
.history-arrows button {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid #65857e;
  background: #0c1b1bd6;
  color: var(--mint);
}
.history-arrows button:disabled {
  opacity: 0.35;
  cursor: default;
}
.history-arrows button:enabled:hover {
  background: #203631;
}
.history-sources {
  color: #b8cac6;
  font-size: 13px;
}
.history-sources summary {
  width: fit-content;
  padding-block: 9px;
  cursor: pointer;
  text-underline-offset: 4px;
}
.history-sources summary:hover,
.history-sources a:hover {
  color: var(--mint);
}
.history-sources ol {
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  list-style: none;
  gap: 22px 30px;
}
.history-sources li {
  border-top: 1px solid var(--line);
  padding: 12px 0 0;
}
.history-sources strong {
  display: block;
  font-size: 14px;
  color: #e3ece8;
  font-weight: 550;
}
.history-sources p {
  line-height: 1.7;
  margin: 5px 0;
}
.history-sources a {
  text-decoration: underline;
  text-underline-offset: 3px;
}
@media (min-width: 721px) and (max-width: 1000px) {
  .history-track {
    grid-auto-columns: calc((100% - var(--stop-gap)) / 2);
  }
}
@media (max-width: 720px) {
  .history-track {
    grid-auto-columns: min(83%, 355px);
    --stop-gap: 19px;
  }
  .history-stop > p {
    font-size: 14px;
  }
  .history-stop figcaption {
    font-size: 11px;
  }
  .history-sources ol {
    grid-template-columns: minmax(0, 1fr);
  }
  .history-tools:has(details[open]) {
    grid-template-columns: minmax(0, 1fr);
  }
  .history-tools:has(details[open]) .history-arrows {
    justify-self: end;
  }
}