/* cyrillic-ext */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(assets/fonts/geist-ff2310f5.woff2) format('woff2');
  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
/* cyrillic */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(assets/fonts/geist-875ccdd4.woff2) format('woff2');
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* vietnamese */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(assets/fonts/geist-52306abf.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(assets/fonts/geist-001175b1.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(assets/fonts/geist-98bbbccb.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* cyrillic-ext */
@font-face {
  font-family: 'Geist Mono';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(assets/fonts/geist-mono-f6b33328.woff2) format('woff2');
  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
/* cyrillic */
@font-face {
  font-family: 'Geist Mono';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(assets/fonts/geist-mono-44e03052.woff2) format('woff2');
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* symbols2 */
@font-face {
  font-family: 'Geist Mono';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(assets/fonts/geist-mono-0638449e.woff2) format('woff2');
  unicode-range: U+2000-2001, U+2004-2008, U+200A, U+23B8-23BD, U+2500-259F;
}
/* vietnamese */
@font-face {
  font-family: 'Geist Mono';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(assets/fonts/geist-mono-971fb274.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
  font-family: 'Geist Mono';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(assets/fonts/geist-mono-44745446.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Geist Mono';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(assets/fonts/geist-mono-013b2f2f.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --font-geist-sans: "Geist";
  --font-geist-mono: "Geist Mono";
}

:root {
  --ink: #f5f7ff;
  --muted: #aab4cb;
  --dim: #6f7b96;
  --night: #050713;
  --night-2: #080d1c;
  --surface: #0e1628;
  --surface-2: #121c32;
  --line: rgba(171, 190, 226, 0.15);
  --cyan: #43d9ff;
  --violet: #8367ff;
  --amber: #ffb22c;
  --rose: #fb7185;
  --observed: #2ed3b7;
  --estimated: #ffb547;
  --debated: #e879f9;
  --header-height: 76px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 12% 18%, rgba(67, 217, 255, 0.055), transparent 24rem),
    radial-gradient(circle at 88% 76%, rgba(131, 103, 255, 0.07), transparent 30rem),
    var(--night);
  color: var(--ink);
  font-family: var(--font-geist-sans), Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image:
    radial-gradient(circle, rgba(255,255,255,.36) 0 1px, transparent 1.4px),
    radial-gradient(circle, rgba(67,217,255,.26) 0 1px, transparent 1.4px);
  background-position: 0 0, 35px 48px;
  background-size: 110px 110px, 170px 170px;
  opacity: .12;
}

::selection {
  background: rgba(67, 217, 255, .28);
  color: #fff;
}

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

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

button {
  font: inherit;
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 16px;
  z-index: 999;
  padding: 11px 16px;
  border-radius: 8px;
  background: #fff;
  color: #050713;
  font-weight: 700;
  transform: translateY(-150%);
  transition: transform .2s ease;
}

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

.scroll-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  height: 2px;
  background: rgba(255,255,255,.04);
}

.scroll-progress span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--violet), var(--amber));
  box-shadow: 0 0 14px var(--cyan);
}

.shell {
  width: min(1240px, calc(100% - 64px));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: var(--header-height);
  padding: 0 max(28px, calc((100vw - 1380px) / 2));
  border-bottom: 1px solid rgba(255,255,255,.09);
  background: rgba(5, 7, 19, .76);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  color: #fff;
  font-size: .84rem;
  font-weight: 650;
  letter-spacing: .16em;
  white-space: nowrap;
}

.wordmark b {
  color: var(--cyan);
  font-weight: 700;
}

.wordmark-mark {
  position: relative;
  display: grid;
  width: 29px;
  height: 29px;
  place-items: center;
  border: 1px solid rgba(67,217,255,.6);
  border-radius: 50%;
  transform: rotate(-20deg);
}

.wordmark-mark::before {
  position: absolute;
  width: 37px;
  height: 10px;
  border: 1px solid rgba(131,103,255,.8);
  border-radius: 50%;
  content: "";
}

.wordmark-mark i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 12px var(--amber);
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 2vw, 30px);
  padding-inline: 30px;
}

.main-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: #aab4cb;
  font-size: .78rem;
  font-weight: 530;
  letter-spacing: .02em;
  transition: color .2s ease;
}

.main-nav a::after {
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--cyan);
  content: "";
  transform: scaleX(0);
  transition: transform .2s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: #fff;
}

.main-nav a.active::after,
.main-nav a:hover::after {
  transform: scaleX(1);
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid rgba(67,217,255,.45);
  border-radius: 999px;
  color: #dff9ff;
  font-size: .78rem;
  font-weight: 630;
  transition: border-color .2s ease, background .2s ease, transform .2s ease;
}

.header-cta:hover {
  border-color: var(--cyan);
  background: rgba(67,217,255,.09);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(255,255,255,.04);
  place-items: center;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1px;
  margin: 3px auto;
  background: #fff;
}

main {
  display: block;
}

.section {
  position: relative;
  scroll-margin-top: 74px;
  padding: 126px 0;
}

.hero {
  position: relative;
  display: flex;
  min-height: 980px;
  flex-direction: column;
  overflow: hidden;
  padding-top: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: #050713;
}

.hero-image {
  position: absolute;
  z-index: 0;
  top: var(--header-height);
  right: 0;
  bottom: 0;
  width: 64%;
  overflow: hidden;
  background:
    radial-gradient(circle at 55% 48%, rgba(255,178,44,.38), transparent 18%),
    radial-gradient(circle at 62% 52%, rgba(131,103,255,.2), transparent 40%),
    #080d1c;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,.55) 16%, #000 38%);
  mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,.55) 16%, #000 38%);
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: contrast(1.09) saturate(.95) brightness(.82);
  animation: galaxy-drift 22s ease-in-out infinite alternate;
}

.hero-overlay {
  position: absolute;
  z-index: 1;
  inset: var(--header-height) 0 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, #050713 0%, rgba(5,7,19,.97) 28%, rgba(5,7,19,.5) 59%, rgba(5,7,19,.18) 100%),
    linear-gradient(0deg, #050713 0%, transparent 34%),
    radial-gradient(circle at 69% 40%, transparent 0, rgba(5,7,19,.06) 28%, rgba(5,7,19,.58) 82%);
}

.hero-orbit {
  position: absolute;
  z-index: 2;
  pointer-events: none;
  border: 1px solid rgba(67,217,255,.18);
  border-radius: 50%;
}

.hero-orbit::after {
  position: absolute;
  top: 49%;
  right: -3px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 18px var(--cyan);
  content: "";
}

.orbit-one {
  top: 18%;
  right: 8%;
  width: 40vw;
  height: 40vw;
  transform: rotate(24deg);
  animation: orbit-turn 28s linear infinite;
}

.orbit-two {
  top: 28%;
  right: 15%;
  width: 29vw;
  height: 29vw;
  border-color: rgba(255,178,44,.18);
  transform: rotate(-16deg);
  animation: orbit-turn 36s linear infinite reverse;
}

.hero-content {
  position: relative;
  z-index: 4;
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(270px, .48fr);
  align-items: center;
  min-height: 665px;
  gap: 9vw;
  padding-top: 86px;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow,
.kicker,
.mini-kicker {
  margin: 0;
  color: var(--cyan);
  font-family: var(--font-geist-mono), monospace;
  font-size: .73rem;
  font-weight: 630;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
  color: #d9faff;
}

.eyebrow span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 16px var(--cyan);
}

.hero h1 {
  max-width: 800px;
  margin: 0;
  font-size: clamp(4rem, 7.7vw, 7.6rem);
  font-weight: 590;
  letter-spacing: -.073em;
  line-height: .88;
}

.hero h1 em {
  display: block;
  color: transparent;
  font-style: normal;
  background: linear-gradient(92deg, #dffaff, var(--cyan) 38%, #a88fff 75%, #f3eaff);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-lede {
  max-width: 680px;
  margin: 34px 0 0;
  color: #c2cadc;
  font-size: clamp(1.08rem, 1.5vw, 1.24rem);
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  min-height: 54px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: .88rem;
  font-weight: 650;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}

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

.button-primary {
  background: #eefcff;
  color: #07111b;
  box-shadow: 0 12px 40px rgba(67,217,255,.14);
}

.button-primary:hover {
  box-shadow: 0 14px 48px rgba(67,217,255,.26);
}

.button-ghost {
  border-color: rgba(255,255,255,.19);
  background: rgba(255,255,255,.035);
  color: #fff;
}

.button-ghost:hover {
  border-color: rgba(255,255,255,.4);
  background: rgba(255,255,255,.07);
}

.hero-object-card {
  position: relative;
  align-self: end;
  margin-bottom: 70px;
  overflow: hidden;
  border: 1px solid rgba(134, 224, 255, .23);
  border-radius: 18px;
  background: rgba(6, 11, 27, .7);
  box-shadow: 0 24px 70px rgba(0,0,0,.28);
  -webkit-backdrop-filter: blur(15px);
  backdrop-filter: blur(15px);
}

.object-card-topline {
  display: flex;
  justify-content: space-between;
  padding: 15px 17px;
  border-bottom: 1px solid var(--line);
  color: var(--cyan);
  font-family: var(--font-geist-mono), monospace;
  font-size: .66rem;
  letter-spacing: .14em;
}

.hero-object-card dl {
  margin: 0;
  padding: 5px 17px 14px;
}

.hero-object-card dl div {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(255,255,255,.07);
}

.hero-object-card dl div:last-child {
  border: 0;
}

.hero-object-card dt {
  color: var(--dim);
  font-size: .71rem;
}

.hero-object-card dd {
  margin: 0;
  color: #eaf4ff;
  font-family: var(--font-geist-mono), monospace;
  font-size: .68rem;
  text-align: right;
}

.object-card-scan {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  box-shadow: 0 0 12px var(--cyan);
  animation: scan 5s ease-in-out infinite;
}

.hero-facts {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: auto;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(10, 16, 34, .74);
  box-shadow: 0 25px 80px rgba(0,0,0,.2);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.hero-facts article {
  position: relative;
  display: flex;
  min-height: 128px;
  flex-direction: column;
  justify-content: center;
  padding: 22px 26px;
  border-right: 1px solid var(--line);
}

.hero-facts article:last-child {
  border-right: 0;
}

.hero-facts strong {
  color: #fff;
  font-family: var(--font-geist-mono), monospace;
  font-size: clamp(1.42rem, 2vw, 2rem);
  font-weight: 510;
  letter-spacing: -.04em;
  line-height: 1.2;
}

.hero-facts sup {
  font-size: .54em;
}

.hero-facts span {
  margin-top: 4px;
  color: #dae6f7;
  font-size: .84rem;
}

.hero-facts small {
  margin-top: 2px;
  color: var(--dim);
  font-size: .69rem;
}

.image-credit {
  position: relative;
  z-index: 5;
  width: min(1240px, calc(100% - 64px));
  margin: 14px auto 20px;
  color: #64708a;
  font-size: .59rem;
  line-height: 1.45;
  text-align: right;
}

.section-heading h2,
.binary-intro h2 {
  margin: 16px 0 0;
  font-size: clamp(3rem, 5.2vw, 5.55rem);
  font-weight: 580;
  letter-spacing: -.065em;
  line-height: .98;
}

.section-heading h2 span,
.binary-intro h2 span {
  color: var(--cyan);
}

.split-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, .72fr);
  align-items: end;
  gap: 8vw;
}

.heading-copy {
  max-width: 600px;
  padding-bottom: 5px;
}

.heading-copy p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.75;
}

.heading-copy p:last-child {
  margin-bottom: 0;
}

.centered-heading {
  max-width: 860px;
  margin: 0 auto 60px;
  text-align: center;
}

.centered-heading > p:last-child {
  max-width: 690px;
  margin: 24px auto 0;
  color: var(--muted);
  font-size: 1.03rem;
}

.overview-section {
  background:
    linear-gradient(180deg, rgba(5,7,19,1), rgba(8,13,28,.94)),
    var(--night);
}

.certainty-legend {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 56px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.certainty-legend > span:first-child {
  margin-right: auto;
  color: var(--dim);
  font-family: var(--font-geist-mono), monospace;
  font-size: .66rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.certainty {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #bfc9dc;
  font-family: var(--font-geist-mono), monospace;
  font-size: .64rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.certainty i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
}

.certainty.observed { color: var(--observed); }
.certainty.estimated { color: var(--estimated); }
.certainty.debated { color: var(--debated); }
.certainty.neutral { color: #a6b0c5; }

.identity-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 36px;
}

.identity-card {
  position: relative;
  min-height: 390px;
  padding: 26px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(160deg, rgba(18,28,50,.78), rgba(10,16,34,.68));
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}

.identity-card::after {
  position: absolute;
  inset: auto -20% -42% 10%;
  height: 54%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(67,217,255,.09), transparent 68%);
  content: "";
}

.identity-card:hover {
  border-color: rgba(67,217,255,.35);
  background: linear-gradient(160deg, rgba(20,34,60,.88), rgba(10,16,34,.74));
  transform: translateY(-5px);
}

.identity-number {
  color: var(--dim);
  font-family: var(--font-geist-mono), monospace;
  font-size: .68rem;
  letter-spacing: .12em;
}

.identity-card h3 {
  position: relative;
  z-index: 1;
  margin: 30px 0 10px;
  font-size: 1.35rem;
  font-weight: 570;
  letter-spacing: -.03em;
}

.identity-card p {
  position: relative;
  z-index: 1;
  margin: 0 0 24px;
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.7;
}

.identity-card > .certainty {
  position: absolute;
  z-index: 2;
  left: 26px;
  bottom: 24px;
}

.identity-symbol {
  position: relative;
  width: 112px;
  height: 92px;
  margin: 32px auto 0;
}

.merger-symbol::before,
.merger-symbol::after {
  position: absolute;
  top: 26px;
  width: 54px;
  height: 42px;
  border: 1px solid rgba(67,217,255,.7);
  border-radius: 55% 45% 52% 48%;
  background: radial-gradient(circle, rgba(67,217,255,.4), transparent 65%);
  box-shadow: 0 0 30px rgba(67,217,255,.12);
  content: "";
}

.merger-symbol::before { left: 8px; transform: rotate(23deg); }
.merger-symbol::after { right: 8px; border-color: rgba(131,103,255,.75); background: radial-gradient(circle, rgba(131,103,255,.42), transparent 65%); transform: rotate(-25deg); }
.merger-symbol i { position: absolute; top: 46px; left: 53px; z-index: 1; width: 6px; height: 6px; border-radius: 50%; background: #fff; box-shadow: 0 0 18px #fff; }

.quasar-symbol::before {
  position: absolute;
  inset: 15px 25px;
  border: 1px solid rgba(255,178,44,.6);
  border-radius: 50%;
  background: radial-gradient(circle, #fff 0 4px, var(--amber) 5px 10px, rgba(255,178,44,.14) 11px 28px, transparent 30px);
  box-shadow: 0 0 40px rgba(255,178,44,.2);
  content: "";
}

.quasar-symbol::after {
  position: absolute;
  top: 44px;
  left: 9px;
  width: 94px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--amber), #fff, var(--amber), transparent);
  content: "";
  transform: rotate(-18deg);
}

.ulirg-symbol i {
  position: absolute;
  left: 51px;
  bottom: 16px;
  width: 10px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(0deg, var(--amber), var(--rose), transparent);
  filter: blur(1px);
  transform-origin: bottom;
}

.ulirg-symbol i:nth-child(1) { transform: rotate(-44deg); }
.ulirg-symbol i:nth-child(2) { transform: rotate(0); height: 74px; }
.ulirg-symbol i:nth-child(3) { transform: rotate(44deg); }

.starburst-symbol::before {
  position: absolute;
  inset: 11px 20px;
  background: repeating-conic-gradient(from 0deg, var(--cyan) 0deg 3deg, transparent 3deg 24deg);
  border-radius: 50%;
  content: "";
  filter: drop-shadow(0 0 10px rgba(67,217,255,.3));
}

.starburst-symbol::after {
  position: absolute;
  top: 39px;
  left: 48px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 20px var(--cyan);
  content: "";
}

.research-note {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 30px;
  margin-top: 48px;
  padding: 28px 30px;
  border: 1px solid rgba(255,181,71,.24);
  border-radius: 16px;
  background: rgba(255,181,71,.045);
}

.note-label {
  color: var(--estimated);
  font-family: var(--font-geist-mono), monospace;
  font-size: .7rem;
  font-weight: 650;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.research-note p {
  margin: 0;
  color: #c3c9d7;
  font-size: .91rem;
  line-height: 1.75;
}

.spectrum-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 50% 40%, rgba(67,217,255,.07), transparent 36rem),
    #060a17;
}

.spectrum-explorer {
  overflow: hidden;
  border: 1px solid rgba(171,190,226,.17);
  border-radius: 24px;
  background: rgba(10,16,34,.85);
  box-shadow: 0 38px 100px rgba(0,0,0,.25);
}

.spectrum-tabs {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  border-bottom: 1px solid var(--line);
}

.spectrum-tabs button {
  position: relative;
  display: flex;
  min-height: 96px;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 15px 18px 15px 28px;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: #9ea9c0;
  cursor: pointer;
  text-align: left;
  transition: background .2s ease, color .2s ease;
}

.spectrum-tabs button:last-child { border-right: 0; }
.spectrum-tabs button:hover { background: rgba(255,255,255,.035); color: #fff; }
.spectrum-tabs button[aria-selected="true"] { background: rgba(255,255,255,.055); color: #fff; }

.spectrum-tabs button::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--band-color);
  box-shadow: 0 0 18px var(--band-color);
  content: "";
  opacity: 0;
}

.spectrum-tabs button[aria-selected="true"]::after { opacity: 1; }

.tab-dot {
  position: absolute;
  top: 18px;
  left: 14px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  box-shadow: 0 0 9px currentColor;
}

.spectrum-tabs button > span:nth-child(2) {
  font-size: .77rem;
  font-weight: 610;
}

.spectrum-tabs button small {
  margin-top: 6px;
  color: #66718b;
  font-family: var(--font-geist-mono), monospace;
  font-size: .58rem;
}

.spectrum-stage {
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  min-height: 590px;
}

.spectrum-visual {
  position: relative;
  display: grid;
  overflow: hidden;
  place-items: center;
  border-right: 1px solid var(--line);
  background:
    radial-gradient(circle at center, color-mix(in srgb, var(--band-color) 16%, transparent), transparent 38%),
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: auto, 46px 46px, 46px 46px;
}

.spectrum-visual::after {
  position: absolute;
  inset: 13%;
  border: 1px dashed color-mix(in srgb, var(--band-color) 25%, transparent);
  border-radius: 50%;
  content: "";
  animation: orbit-turn 28s linear infinite;
}

.galaxy-core {
  position: relative;
  z-index: 3;
  width: 118px;
  height: 118px;
  border: 1px solid color-mix(in srgb, var(--band-color) 60%, transparent);
  border-radius: 50%;
  background: radial-gradient(circle, #fff 0 5%, var(--band-color) 7%, color-mix(in srgb, var(--band-color) 35%, transparent) 30%, transparent 68%);
  box-shadow: 0 0 80px color-mix(in srgb, var(--band-color) 35%, transparent);
}

.galaxy-core::before,
.galaxy-core::after {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid color-mix(in srgb, var(--band-color) 50%, transparent);
  border-radius: 50%;
  content: "";
  transform: translate(-50%, -50%) rotate(-22deg);
}

.galaxy-core::before { width: 238px; height: 60px; }
.galaxy-core::after { width: 320px; height: 100px; opacity: .45; transform: translate(-50%, -50%) rotate(22deg); }

.galaxy-core span::before,
.galaxy-core span::after {
  position: absolute;
  left: 54px;
  width: 8px;
  height: 120px;
  background: linear-gradient(transparent, var(--band-color), transparent);
  content: "";
  filter: blur(3px);
}

.galaxy-core span::before { bottom: 85px; }
.galaxy-core span::after { top: 85px; }

.spectral-rings i {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid color-mix(in srgb, var(--band-color) 28%, transparent);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.spectral-rings i:nth-child(1) { width: 190px; height: 190px; }
.spectral-rings i:nth-child(2) { width: 300px; height: 300px; opacity: .7; }
.spectral-rings i:nth-child(3) { width: 420px; height: 420px; opacity: .45; }
.spectral-rings i:nth-child(4) { width: 540px; height: 540px; opacity: .2; }

.wave-lines i {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 54%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--band-color));
  transform-origin: left;
}

.wave-lines i:nth-child(1) { transform: rotate(-33deg); }
.wave-lines i:nth-child(2) { transform: rotate(12deg); }
.wave-lines i:nth-child(3) { transform: rotate(56deg); }

.band-readout {
  position: absolute;
  left: 22px;
  bottom: 18px;
  color: var(--band-color);
  font-family: var(--font-geist-mono), monospace;
  font-size: .65rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.spectrum-copy {
  padding: clamp(38px, 5vw, 76px);
}

.band-index {
  margin: 0;
  color: var(--band-color);
  font-family: var(--font-geist-mono), monospace;
  font-size: .68rem;
  letter-spacing: .14em;
}

.spectrum-copy h3 {
  margin: 12px 0 34px;
  color: #fff;
  font-size: clamp(2.3rem, 3.5vw, 3.8rem);
  font-weight: 560;
  letter-spacing: -.055em;
  line-height: 1;
}

.spectrum-detail {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 22px;
  padding: 23px 0;
  border-top: 1px solid var(--line);
}

.spectrum-detail > span {
  color: var(--band-color);
  font-family: var(--font-geist-mono), monospace;
  font-size: .64rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.spectrum-detail p {
  margin: 0;
  color: #b7c1d5;
  font-size: .9rem;
  line-height: 1.75;
}

.facility-line {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 30px 0 0;
  color: #7f8aa2;
  font-family: var(--font-geist-mono), monospace;
  font-size: .64rem;
}

.facility-line i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--band-color);
  box-shadow: 0 0 9px var(--band-color);
}

.feedback-section {
  background:
    radial-gradient(circle at 0% 36%, rgba(255,178,44,.05), transparent 25rem),
    radial-gradient(circle at 100% 77%, rgba(67,217,255,.05), transparent 30rem),
    var(--night-2);
}

.feedback-heading h2 span { color: var(--amber); }

.feedback-flow {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 11px;
  margin-top: 70px;
}

.feedback-flow article {
  position: relative;
  min-height: 176px;
  padding: 22px 18px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(14,22,40,.67);
}

.feedback-flow article:not(:last-child)::after {
  position: absolute;
  z-index: 2;
  top: 50%;
  right: -12px;
  width: 12px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  content: "";
}

.feedback-flow article > span {
  color: var(--amber);
  font-family: var(--font-geist-mono), monospace;
  font-size: .65rem;
}

.feedback-flow h3 {
  margin: 34px 0 7px;
  font-size: .96rem;
  font-weight: 610;
  letter-spacing: -.02em;
}

.feedback-flow p {
  margin: 0;
  color: #8390a9;
  font-size: .72rem;
  line-height: 1.6;
}

.flow-caveat {
  margin: 16px 0 0;
  color: #67738d;
  font-size: .7rem;
  text-align: right;
}

.outflow-grid {
  display: grid;
  grid-template-columns: 1.42fr .78fr;
  gap: 16px;
  margin-top: 60px;
}

.velocity-card,
.fountain-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(155deg, rgba(16,26,48,.86), rgba(8,13,29,.84));
}

.velocity-card {
  padding: clamp(26px, 4vw, 46px);
}

.card-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line);
}

.card-header h3,
.fountain-card h3 {
  margin: 8px 0 0;
  font-size: clamp(1.6rem, 2.4vw, 2.4rem);
  font-weight: 560;
  letter-spacing: -.045em;
  line-height: 1.1;
}

.card-header > span {
  color: #657189;
  font-family: var(--font-geist-mono), monospace;
  font-size: .56rem;
  text-transform: uppercase;
}

.velocity-chart {
  padding-top: 14px;
}

.velocity-row {
  padding: 18px 0 4px;
}

.velocity-label {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 9px;
}

.velocity-label span {
  color: #aeb8ca;
  font-size: .76rem;
}

.velocity-label strong {
  color: #f4f7ff;
  font-family: var(--font-geist-mono), monospace;
  font-size: .7rem;
  font-weight: 500;
}

.velocity-track {
  height: 7px;
  overflow: hidden;
  border-radius: 99px;
  background: rgba(255,255,255,.055);
}

.velocity-track > span {
  display: block;
  min-width: 5%;
  height: 100%;
  border-radius: 99px;
  box-shadow: 0 0 14px currentColor;
}

.velocity-track .cyan { color: var(--cyan); background: var(--cyan); }
.velocity-track .violet { color: var(--violet); background: var(--violet); }
.velocity-track .amber { color: var(--amber); background: var(--amber); }
.velocity-track .blue { color: #60a5fa; background: #60a5fa; }
.velocity-track .rose { color: var(--rose); background: var(--rose); }

.fountain-card {
  position: relative;
  padding: 36px;
  overflow: hidden;
}

.fountain-card::before {
  position: absolute;
  right: -30%;
  bottom: -24%;
  width: 95%;
  height: 70%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,178,44,.13), transparent 68%);
  content: "";
}

.fountain-card > * { position: relative; z-index: 2; }

.fountain-card > p:not(.mini-kicker) {
  margin: 20px 0 26px;
  color: #aeb8ca;
  font-size: .88rem;
  line-height: 1.75;
}

.fountain-card strong {
  color: var(--amber);
}

.fountain-visual {
  position: relative;
  height: 150px;
  margin: -10px -8px 28px;
}

.fountain-core {
  position: absolute;
  bottom: 13px;
  left: 50%;
  width: 23px;
  height: 23px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 15px var(--amber), 0 0 50px rgba(255,178,44,.65);
  transform: translateX(-50%);
}

.fountain-arc {
  position: absolute;
  bottom: 18px;
  left: 50%;
  width: 165px;
  height: 120px;
  border: 2px solid var(--amber);
  border-color: var(--amber) transparent transparent;
  border-radius: 50%;
  transform: translateX(-50%);
  filter: drop-shadow(0 0 7px rgba(255,178,44,.45));
}

.fountain-arc.arc-b { width: 230px; height: 145px; border-color: rgba(67,217,255,.55) transparent transparent; transform: translateX(-50%) rotate(9deg); }

.fountain-drop {
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 9px var(--cyan);
}

.drop-a { top: 24px; left: 22%; }
.drop-b { top: 8px; right: 28%; }
.drop-c { top: 63px; right: 12%; background: var(--amber); box-shadow: 0 0 9px var(--amber); }

.jet-feature {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  min-height: 520px;
  margin-top: 80px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #080e1e;
}

.jet-visual {
  position: relative;
  overflow: hidden;
  border-right: 1px solid var(--line);
  background:
    radial-gradient(circle at 36% 55%, rgba(67,217,255,.18), transparent 14rem),
    radial-gradient(circle at 70% 28%, rgba(131,103,255,.1), transparent 12rem),
    linear-gradient(rgba(255,255,255,.023) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.023) 1px, transparent 1px);
  background-size: auto, auto, 42px 42px, 42px 42px;
}

.jet-core {
  position: absolute;
  top: 55%;
  left: 27%;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: radial-gradient(circle, #fff 0 12%, var(--cyan) 15%, rgba(67,217,255,.2) 42%, transparent 66%);
  box-shadow: 0 0 44px rgba(67,217,255,.4);
  transform: translate(-50%, -50%);
}

.jet-segment {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, #fff, var(--cyan), rgba(131,103,255,.35));
  box-shadow: 0 0 13px var(--cyan);
  transform-origin: left;
}

.segment-one { top: 55%; left: 27%; width: 24%; transform: rotate(-22deg); }
.segment-two { top: 46%; left: 48.5%; width: 24%; transform: rotate(-48deg); }
.segment-three { top: 28%; left: 64%; width: 24%; transform: rotate(-78deg); }

.jet-angle {
  position: absolute;
  top: 25%;
  right: 9%;
  color: var(--cyan);
  font-family: var(--font-geist-mono), monospace;
  font-size: .65rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.jet-cloud {
  position: absolute;
  width: 110px;
  height: 78px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(131,103,255,.18), transparent 66%);
  filter: blur(3px);
}

.cloud-one { top: 32%; right: 25%; }
.cloud-two { top: 10%; right: 5%; width: 150px; }
.cloud-three { bottom: 14%; left: 55%; }

.jet-copy {
  align-self: center;
  padding: clamp(38px, 6vw, 80px);
}

.jet-copy h3 {
  max-width: 580px;
  margin: 14px 0 22px;
  font-size: clamp(2.25rem, 4vw, 4rem);
  font-weight: 560;
  letter-spacing: -.06em;
  line-height: 1.02;
}

.jet-copy > p:not(.kicker) {
  max-width: 600px;
  margin: 0;
  color: var(--muted);
  font-size: .98rem;
  line-height: 1.8;
}

.jet-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 38px 0 0;
}

.jet-stats div {
  padding-top: 15px;
  border-top: 1px solid var(--line);
}

.jet-stats dt {
  color: #66728a;
  font-size: .66rem;
}

.jet-stats dd {
  margin: 6px 0 0;
  color: #dce7f7;
  font-size: .73rem;
  line-height: 1.45;
}

.binary-section {
  overflow: hidden;
  border-top: 1px solid rgba(232,121,249,.15);
  border-bottom: 1px solid rgba(232,121,249,.15);
  background:
    radial-gradient(circle at 77% 18%, rgba(232,121,249,.11), transparent 25rem),
    radial-gradient(circle at 23% 80%, rgba(131,103,255,.12), transparent 31rem),
    #080714;
}

.binary-orbit-bg {
  position: absolute;
  top: -160px;
  right: -160px;
  width: 620px;
  height: 620px;
  border: 1px solid rgba(232,121,249,.1);
  border-radius: 50%;
  transform: rotate(20deg);
}

.binary-orbit-bg::before,
.binary-orbit-bg::after {
  position: absolute;
  top: 50%;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  content: "";
  transform: translateY(-50%);
}

.binary-orbit-bg::before { left: -13px; background: var(--violet); box-shadow: 0 0 36px var(--violet); }
.binary-orbit-bg::after { right: -13px; background: var(--debated); box-shadow: 0 0 36px var(--debated); }
.binary-orbit-bg i { position: absolute; inset: 22%; border: 1px solid rgba(131,103,255,.12); border-radius: 50%; }

.binary-intro {
  position: relative;
  z-index: 2;
  max-width: 960px;
  margin: 0 auto 65px;
  text-align: center;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 28px 0 0;
  padding: 8px 13px;
  border: 1px solid rgba(232,121,249,.34);
  border-radius: 99px;
  background: rgba(232,121,249,.055);
  color: #f5b8ff;
  font-family: var(--font-geist-mono), monospace;
  font-size: .66rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.status-badge i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--debated);
  box-shadow: 0 0 10px var(--debated);
}

.binary-intro h2 span { color: #e9a0f6; }

.binary-intro > p:last-child {
  max-width: 760px;
  margin: 28px auto 0;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.78;
}

.evidence-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.evidence-card {
  padding: clamp(28px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: 21px;
  background: rgba(14,15,35,.75);
}

.evidence-card.intriguing { border-color: rgba(46,211,183,.2); }
.evidence-card.unproven { border-color: rgba(232,121,249,.22); }

.evidence-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  color: #e7eefb;
  font-size: .88rem;
  font-weight: 650;
}

.evidence-label span {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  color: var(--observed);
  font-family: var(--font-geist-mono), monospace;
  font-size: .8rem;
}

.unproven .evidence-label span { color: var(--debated); }

.evidence-card ul {
  display: grid;
  gap: 18px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.evidence-card li {
  position: relative;
  padding-left: 24px;
  color: #aeb8cc;
  font-size: .9rem;
  line-height: 1.72;
}

.evidence-card li::before {
  position: absolute;
  top: .7em;
  left: 0;
  width: 8px;
  height: 1px;
  background: var(--observed);
  content: "";
}

.unproven li::before { background: var(--debated); }

.certainty-ladder {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 30px;
}

.certainty-ladder article {
  min-height: 150px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(255,255,255,.025);
}

.certainty-ladder p {
  margin: 20px 0 0;
  color: #939eb4;
  font-size: .76rem;
  line-height: 1.65;
}

.binary-closing {
  margin: 64px 0 0;
  color: #909bb0;
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  text-align: center;
}

.binary-closing strong { color: #fff; font-weight: 560; }

.facts-section {
  background: var(--night-2);
}

.facts-section .section-heading h2 span { color: var(--amber); }

.facts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: 70px;
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
  background: var(--line);
}

.fact-card {
  position: relative;
  min-height: 245px;
  padding: 36px 38px 34px 100px;
  background: #0a1021;
  transition: background .22s ease;
}

.fact-card:hover { background: #10192d; }

.fact-card > span {
  position: absolute;
  top: 38px;
  left: 34px;
  color: var(--amber);
  font-family: var(--font-geist-mono), monospace;
  font-size: .68rem;
  letter-spacing: .1em;
}

.fact-card h3 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 570;
  letter-spacing: -.035em;
}

.fact-card p {
  max-width: 490px;
  margin: 16px 0 0;
  color: #9eabc1;
  font-size: .88rem;
  line-height: 1.74;
}

.timeline-section {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 50% 36%, rgba(131,103,255,.08), transparent 33rem),
    #060a17;
}

.timeline-section .section-heading h2 span { color: #a894ff; }

.filter-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 auto 58px;
}

.filter-row button {
  min-height: 44px;
  padding: 0 17px;
  border: 1px solid var(--line);
  border-radius: 99px;
  background: rgba(255,255,255,.025);
  color: #8f9ab1;
  font-size: .72rem;
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}

.filter-row button:hover,
.filter-row button.active {
  border-color: rgba(131,103,255,.55);
  background: rgba(131,103,255,.12);
  color: #fff;
}

.timeline-list {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
}

.timeline-list::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 142px;
  width: 1px;
  background: linear-gradient(var(--violet), rgba(131,103,255,.05));
  content: "";
}

.timeline-list article {
  position: relative;
  display: grid;
  grid-template-columns: 116px 54px 140px 1fr;
  align-items: start;
  min-height: 100px;
  padding: 20px 0;
  animation: timeline-in .26s ease both;
}

.timeline-marker {
  position: relative;
  display: grid;
  height: 30px;
  place-items: center;
}

.timeline-marker i {
  position: relative;
  z-index: 2;
  width: 8px;
  height: 8px;
  border: 2px solid #090d1a;
  border-radius: 50%;
  background: var(--violet);
  box-shadow: 0 0 0 1px rgba(131,103,255,.6), 0 0 14px rgba(131,103,255,.55);
}

.timeline-list time {
  padding-top: 2px;
  color: #eef2ff;
  font-family: var(--font-geist-mono), monospace;
  font-size: .83rem;
}

.timeline-list article > span {
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 99px;
  color: #8f9ab1;
  font-family: var(--font-geist-mono), monospace;
  font-size: .56rem;
  text-align: center;
  text-transform: uppercase;
}

.timeline-list article > p {
  margin: 0;
  padding-left: 30px;
  color: #a9b4c8;
  font-size: .87rem;
  line-height: 1.7;
}

.observatories {
  max-width: 980px;
  margin: 70px auto 0;
  padding: 38px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(14,22,40,.56);
}

.observatories > div {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 22px 0 24px;
}

.observatories > div span {
  padding: 8px 13px;
  border: 1px solid rgba(67,217,255,.18);
  border-radius: 7px;
  background: rgba(67,217,255,.045);
  color: #cfeaf2;
  font-family: var(--font-geist-mono), monospace;
  font-size: .63rem;
}

.observatories > p:last-child {
  margin: 0;
  color: #7e899f;
  font-size: .76rem;
  line-height: 1.7;
}

.sources-section {
  border-top: 1px solid var(--line);
  background: #070b18;
}

.sources-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 68px;
}

.source-card {
  display: flex;
  min-height: 310px;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: rgba(14,22,40,.58);
  transition: transform .22s ease, border-color .22s ease, background .22s ease;
}

.source-card:hover {
  border-color: rgba(67,217,255,.38);
  background: rgba(18,29,51,.84);
  transform: translateY(-4px);
}

.source-card > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
}

.source-card > div span {
  color: var(--cyan);
  font-family: var(--font-geist-mono), monospace;
  font-size: .62rem;
}

.source-card > div small {
  color: #6e7a93;
  font-family: var(--font-geist-mono), monospace;
  font-size: .55rem;
  text-align: right;
  text-transform: uppercase;
}

.source-card h3 {
  margin: 34px 0 14px;
  font-size: 1.03rem;
  font-weight: 580;
  letter-spacing: -.025em;
  line-height: 1.35;
}

.source-card p {
  margin: 0;
  color: #8f9bb2;
  font-size: .76rem;
  line-height: 1.7;
}

.source-card b {
  display: flex;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 24px;
  color: #cceef6;
  font-size: .7rem;
  font-weight: 570;
}

.methodology {
  margin-top: 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.methodology summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  color: #dfe9f7;
  font-size: .92rem;
  font-weight: 560;
  cursor: pointer;
  list-style: none;
}

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

.methodology summary span {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--cyan);
  font-family: var(--font-geist-mono), monospace;
  transition: transform .2s ease;
}

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

.methodology > div {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  max-width: 1040px;
  padding: 0 0 34px;
}

.methodology p {
  margin: 0;
  color: #8e9ab0;
  font-size: .82rem;
  line-height: 1.75;
}

.review-date {
  margin: 30px 0 0;
  color: #66728a;
  font-family: var(--font-geist-mono), monospace;
  font-size: .62rem;
  text-align: center;
}

.site-footer {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--line);
  background: #04060e;
}

.footer-glow {
  position: absolute;
  top: -340px;
  left: 50%;
  width: 720px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(67,217,255,.1), transparent 66%);
  transform: translateX(-50%);
}

.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr .5fr .9fr;
  gap: 70px;
  padding-top: 72px;
  padding-bottom: 60px;
}

.footer-brand > p {
  max-width: 480px;
  margin: 24px 0 0;
  color: #7f8ba2;
  font-size: .84rem;
  line-height: 1.75;
}

.footer-links {
  display: grid;
  align-content: start;
  gap: 9px;
}

.footer-links p {
  margin: 0 0 9px;
  color: #5f6b83;
  font-family: var(--font-geist-mono), monospace;
  font-size: .6rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: #a4aec1;
  font-size: .78rem;
  transition: color .2s ease;
}

.footer-links a:hover { color: var(--cyan); }

.creator-block {
  display: grid;
  grid-template-columns: 88px 1fr;
  align-items: center;
  gap: 22px;
  align-self: start;
  padding: 22px;
  border: 1px solid rgba(255,178,44,.2);
  border-radius: 17px;
  background: rgba(255,178,44,.035);
}

.creator-block img {
  width: 88px;
  height: 88px;
  object-fit: contain;
}

.creator-block span {
  color: #7e899f;
  font-family: var(--font-geist-mono), monospace;
  font-size: .57rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.creator-block p {
  margin: 7px 0 0;
  color: #f1f3f8;
  font-size: .84rem;
  font-weight: 560;
  line-height: 1.5;
}

.footer-bottom {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  border-top: 1px solid var(--line);
}

.footer-bottom p,
.footer-bottom a {
  margin: 0;
  color: #5f6a80;
  font-size: .65rem;
}

.footer-bottom a {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  transition: color .2s ease;
}

.footer-bottom a:hover { color: var(--cyan); }

@keyframes galaxy-drift {
  from { transform: scale(1.03) translate3d(0,0,0); }
  to { transform: scale(1.09) translate3d(-1.1%, .7%, 0); }
}

@keyframes orbit-turn {
  to { transform: rotate(380deg); }
}

@keyframes scan {
  0%, 100% { top: 0; opacity: 0; }
  12% { opacity: 1; }
  82% { opacity: 1; }
  95% { top: 100%; opacity: 0; }
}

@keyframes timeline-in {
  from { opacity: 0; transform: translateY(7px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 1120px) {
  .main-nav { gap: 13px; padding-inline: 18px; }
  .main-nav a { font-size: .7rem; }
  .hero-content { gap: 4vw; }
  .identity-grid { grid-template-columns: repeat(2, 1fr); }
  .identity-card { min-height: 355px; }
  .spectrum-tabs button { padding-left: 20px; }
  .tab-dot { left: 9px; }
  .feedback-flow { grid-template-columns: repeat(3, 1fr); }
  .feedback-flow article:nth-child(3)::after { display: none; }
  .sources-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  :root { --header-height: 68px; }
  .shell { width: min(100% - 40px, 760px); }
  .site-header { grid-template-columns: 1fr auto; padding: 0 20px; }
  .header-cta { display: none; }
  .menu-toggle { display: block; }
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    padding: 12px 20px 24px;
    border-bottom: 1px solid var(--line);
    background: rgba(5,7,19,.97);
    box-shadow: 0 18px 50px rgba(0,0,0,.28);
  }
  .main-nav.is-open { display: flex; }
  .main-nav a { min-height: 48px; border-bottom: 1px solid rgba(255,255,255,.06); font-size: .8rem; }
  .main-nav a::after { display: none; }
  .section { padding: 96px 0; }
  .hero { min-height: auto; }
  .hero-image { width: 100%; -webkit-mask-image: none; mask-image: none; opacity: .7; }
  .hero-overlay { background: linear-gradient(0deg, #050713 0%, rgba(5,7,19,.65) 47%, rgba(5,7,19,.37) 100%), linear-gradient(90deg, rgba(5,7,19,.8), rgba(5,7,19,.2)); }
  .hero-content { grid-template-columns: 1fr; gap: 44px; min-height: 800px; padding-top: 110px; padding-bottom: 50px; }
  .hero-copy { max-width: 700px; }
  .hero h1 { font-size: clamp(3.9rem, 12vw, 6.8rem); }
  .hero-object-card { width: min(100%, 430px); margin: 0; align-self: start; }
  .hero-facts { grid-template-columns: repeat(2, 1fr); }
  .hero-facts article:nth-child(2) { border-right: 0; }
  .hero-facts article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .image-credit { width: min(100% - 40px, 760px); text-align: left; }
  .orbit-one { width: 70vw; height: 70vw; }
  .orbit-two { width: 52vw; height: 52vw; }
  .split-heading { grid-template-columns: 1fr; gap: 34px; }
  .heading-copy { max-width: 650px; }
  .certainty-legend > span:first-child { width: 100%; margin-bottom: 6px; }
  .spectrum-tabs { display: flex; overflow-x: auto; scrollbar-width: thin; }
  .spectrum-tabs button { min-width: 145px; }
  .spectrum-stage { grid-template-columns: 1fr; }
  .spectrum-visual { min-height: 490px; border-right: 0; border-bottom: 1px solid var(--line); }
  .outflow-grid { grid-template-columns: 1fr; }
  .jet-feature { grid-template-columns: 1fr; }
  .jet-visual { min-height: 440px; border-right: 0; border-bottom: 1px solid var(--line); }
  .evidence-grid { grid-template-columns: 1fr; }
  .certainty-ladder { grid-template-columns: repeat(2, 1fr); }
  .timeline-list article { grid-template-columns: 106px 54px 125px 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .creator-block { grid-column: 1 / -1; max-width: 520px; }
}

@media (max-width: 640px) {
  .shell { width: calc(100% - 36px); }
  .wordmark { font-size: .75rem; letter-spacing: .12em; }
  .wordmark-mark { width: 26px; height: 26px; }
  .section { padding: 80px 0; }
  .hero-content { min-height: 760px; padding-top: 88px; }
  .eyebrow { font-size: .62rem; letter-spacing: .1em; }
  .hero h1 { font-size: clamp(3.55rem, 17vw, 5.4rem); }
  .hero-lede { font-size: 1rem; }
  .hero-actions { display: grid; }
  .button { width: 100%; }
  .hero-object-card dl div { grid-template-columns: 1fr; gap: 3px; }
  .hero-object-card dd { text-align: left; }
  .hero-facts { width: calc(100% - 36px); }
  .hero-facts article { min-height: 115px; padding: 18px; }
  .hero-facts strong { font-size: 1.32rem; }
  .hero-facts span { font-size: .75rem; }
  .image-credit { width: calc(100% - 36px); font-size: .52rem; }
  .section-heading h2, .binary-intro h2 { font-size: clamp(2.75rem, 14vw, 4.4rem); }
  .centered-heading { text-align: left; }
  .centered-heading > p:last-child { margin-left: 0; }
  .certainty-legend { align-items: flex-start; flex-direction: column; }
  .identity-grid { grid-template-columns: 1fr; }
  .identity-card { min-height: 350px; }
  .research-note { grid-template-columns: 1fr; gap: 12px; padding: 23px; }
  .spectrum-visual { min-height: 400px; }
  .spectral-rings i:nth-child(4) { display: none; }
  .galaxy-core { width: 94px; height: 94px; }
  .galaxy-core::before { width: 190px; }
  .galaxy-core::after { width: 250px; }
  .spectrum-copy { padding: 32px 22px; }
  .spectrum-detail { grid-template-columns: 1fr; gap: 8px; }
  .feedback-flow { grid-template-columns: 1fr; }
  .feedback-flow article { min-height: 145px; }
  .feedback-flow article:not(:last-child)::after { top: auto; right: auto; bottom: -12px; left: 50%; width: 1px; height: 12px; display: block; }
  .velocity-card, .fountain-card { padding: 24px 20px; }
  .card-header { align-items: flex-start; flex-direction: column; }
  .velocity-label { align-items: flex-start; flex-direction: column; gap: 2px; }
  .jet-visual { min-height: 340px; }
  .jet-copy { padding: 36px 23px; }
  .jet-stats { grid-template-columns: 1fr; }
  .certainty-ladder { grid-template-columns: 1fr; }
  .facts-grid { grid-template-columns: 1fr; }
  .fact-card { min-height: 260px; padding: 34px 24px 32px 70px; }
  .fact-card > span { top: 36px; left: 24px; }
  .timeline-list::before { left: 10px; }
  .timeline-list article { grid-template-columns: 30px 1fr; min-height: 0; padding: 19px 0 30px; }
  .timeline-marker { grid-row: 1 / 4; grid-column: 1; justify-items: start; }
  .timeline-list time { grid-column: 2; }
  .timeline-list article > span { grid-column: 2; justify-self: start; margin-top: 8px; }
  .timeline-list article > p { grid-column: 2; margin-top: 12px; padding: 0; }
  .observatories { padding: 26px 22px; }
  .sources-grid { grid-template-columns: 1fr; }
  .source-card { min-height: 280px; }
  .methodology > div { grid-template-columns: 1fr; gap: 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 38px; }
  .creator-block { grid-column: auto; grid-template-columns: 76px 1fr; padding: 18px; }
  .creator-block img { width: 76px; height: 76px; }
  .footer-bottom { align-items: flex-start; flex-direction: column; justify-content: center; gap: 3px; padding: 14px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: .01ms !important; }
}