/* ============================================================
   时空量子观测台 · SPACETIME & QUANTUM
   Visual system: deep-field editorial / observatory archive
   ============================================================ */

:root {
  --bg: #05070d;
  --bg-2: #080c15;
  --bg-3: #0c111c;
  --ink: #ece7dc;
  --ink-2: #d9d3c5;
  --muted: rgba(236, 231, 220, .62);
  --dim: rgba(236, 231, 220, .38);
  --faint: rgba(236, 231, 220, .16);
  --line: rgba(236, 231, 220, .14);
  --line-strong: rgba(236, 231, 220, .26);
  --gold: #d8b26a;
  --gold-soft: #f0d7a0;
  --cyan: #69d7e6;
  --cyan-soft: #b5f3f8;
  --rose: #e06b9e;
  --violet: #9f8cff;
  --green: #8ed7b0;
  --accent: var(--gold);
  --accent-rgb: 216, 178, 106;
  --serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --sans: "Bahnschrift", "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  --mono: "Cascadia Code", "Consolas", "SFMono-Regular", "Liberation Mono", monospace;
  --max: 1320px;
  --pad: clamp(20px, 4.8vw, 64px);
  --radius: 2px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

body[data-accent="cyan"] { --accent: var(--cyan); --accent-rgb: 105, 215, 230; }
body[data-accent="rose"] { --accent: var(--rose); --accent-rgb: 224, 107, 158; }
body[data-accent="violet"] { --accent: var(--violet); --accent-rgb: 159, 140, 255; }
body[data-accent="ivory"] { --accent: var(--ink); --accent-rgb: 236, 231, 220; }
body[data-accent="gold"] { --accent: var(--gold); --accent-rgb: 216, 178, 106; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body.is-locked { overflow: hidden; }
::selection { background: rgba(var(--accent-rgb), .28); color: #fff; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; color: inherit; }
button { cursor: pointer; }
h1, h2, h3, h4, p, dl, dd, dt, figure, blockquote { margin: 0; }
h1, h2, h3, h4 { text-wrap: balance; }
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }
svg { display: block; }
canvas { display: block; }

:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed; top: 12px; left: 12px; z-index: 999;
  padding: 10px 16px; background: var(--ink); color: var(--bg);
  font-family: var(--mono); font-size: 11px; transform: translateY(-150%);
  transition: transform .2s;
}
.skip-link:focus { transform: translateY(0); }

.mono { font-family: var(--mono); font-size: 10px; letter-spacing: .18em; text-transform: uppercase; }
.m { font-family: var(--serif); font-style: italic; white-space: nowrap; }
.m sub, .m sup { font-style: normal; font-size: .62em; }
.small { font-size: .86rem; color: var(--muted); }

/* ---------- preloader ---------- */
.preloader {
  position: fixed; inset: 0; z-index: 1000;
  display: grid; place-items: center;
  background: #04060a;
  transition: opacity .8s var(--ease), visibility .8s;
}
.preloader.is-done { opacity: 0; visibility: hidden; pointer-events: none; }
.preloader__inner { width: min(420px, 78vw); text-align: center; }
.preloader__meta, .preloader__foot { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 9px; letter-spacing: .18em; color: var(--dim); }
.preloader__mark { width: 96px; height: 96px; margin: 42px auto 26px; color: var(--gold); animation: spin 18s linear infinite; }
.preloader__title { font-family: var(--serif); font-size: clamp(1.5rem, 4vw, 2.3rem); letter-spacing: .18em; }
.preloader__sub { margin-top: 10px; font-family: var(--mono); font-size: 9px; letter-spacing: .4em; color: var(--muted); }
.preloader__bar { height: 1px; margin: 40px 0 14px; background: rgba(236,231,220,.15); overflow: hidden; }
.preloader__bar span { display: block; width: 0; height: 100%; background: var(--gold); box-shadow: 0 0 12px var(--gold); transition: width .25s; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- cosmos ---------- */
.cosmos-wrap {
  position: fixed; inset: 0; z-index: 0; overflow: hidden;
  background: radial-gradient(ellipse at 70% 34%, #0b1220 0%, #05070d 62%, #030409 100%);
}
#cosmos { position: absolute; inset: 0; width: 100%; height: 100%; }
.cosmos-fallback {
  display: none;
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 72% 36%, rgba(105, 215, 230, .08), transparent 38%),
    radial-gradient(ellipse at 28% 64%, rgba(216, 178, 106, .06), transparent 42%),
    radial-gradient(circle at 50% 50%, #0a1020 0%, #05070d 55%, #020306 100%);
}
body.no-webgl .cosmos-fallback { display: block; }
.cosmos-vignette {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse at 50% 45%, transparent 28%, rgba(2,3,7,.42) 78%, rgba(2,3,7,.86) 100%),
    linear-gradient(to bottom, rgba(2,3,7,.5), transparent 18%, transparent 78%, rgba(2,3,7,.7));
}
.grain {
  position: fixed; inset: -50%; z-index: 3; pointer-events: none; opacity: .045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grainShift 8s steps(10) infinite;
}
@keyframes grainShift {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-2%, 1%); }
  40% { transform: translate(1%, -2%); }
  60% { transform: translate(-1%, 2%); }
  80% { transform: translate(2%, -1%); }
}

/* ---------- header ---------- */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 74px; display: flex; align-items: center; gap: 28px;
  padding: 0 var(--pad);
  background: linear-gradient(to bottom, rgba(5,7,13,.92), rgba(5,7,13,.62) 70%, transparent);
  border-bottom: 1px solid transparent;
  transition: background .4s, border-color .4s, height .4s;
}
.topbar.is-scrolled {
  height: 62px;
  background: rgba(5,7,13,.86);
  border-bottom-color: var(--line);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand__mark { width: 38px; height: 38px; color: var(--accent); transition: color .6s; }
.brand__copy { display: flex; flex-direction: column; line-height: 1.15; }
.brand__copy strong { font-family: var(--serif); font-size: 15px; letter-spacing: .14em; font-weight: 600; }
.brand__copy small { font-family: var(--mono); font-size: 7.5px; letter-spacing: .2em; color: var(--dim); margin-top: 3px; }
.nav { display: flex; align-items: center; gap: clamp(12px, 1.7vw, 26px); margin-left: auto; }
.nav a {
  position: relative; display: flex; align-items: baseline; gap: 6px;
  font-size: 12.5px; color: var(--muted); letter-spacing: .08em;
  padding: 6px 0; transition: color .25s;
}
.nav a span { font-family: var(--mono); font-size: 8px; color: var(--dim); }
.nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0;
  height: 1px; background: var(--accent); transition: none;
}
.nav a:hover, .nav a.is-active { color: var(--ink); }
.nav a:hover::after, .nav a.is-active::after { right: 0; }
.topbar__actions { display: flex; align-items: center; gap: 16px; margin-left: 10px; }
.icon-btn, .sound-btn, .menu-btn {
  background: none; border: 0; padding: 8px; color: var(--muted);
  display: flex; align-items: center; gap: 7px; transition: color .25s;
}
.icon-btn:hover, .sound-btn:hover, .menu-btn:hover { color: var(--ink); }
.icon-btn svg { width: 17px; height: 17px; }
.icon-btn__hint { font-family: var(--mono); font-size: 8px; color: var(--dim); border: 1px solid var(--line); padding: 2px 4px; }
.sound-btn { gap: 8px; }
.sound-bars { display: flex; align-items: flex-end; gap: 2px; height: 12px; }
.sound-bars i { width: 2px; background: currentColor; height: 30%; transition: height .3s; }
.sound-bars i:nth-child(2) { height: 65%; }
.sound-bars i:nth-child(3) { height: 45%; }
.sound-bars i:nth-child(4) { height: 85%; }
.sound-btn[aria-pressed="true"] .sound-bars i { animation: soundBar .9s ease-in-out infinite alternate; }
.sound-btn[aria-pressed="true"] .sound-bars i:nth-child(2) { animation-delay: .2s; }
.sound-btn[aria-pressed="true"] .sound-bars i:nth-child(3) { animation-delay: .4s; }
.sound-btn[aria-pressed="true"] .sound-bars i:nth-child(4) { animation-delay: .1s; }
@keyframes soundBar { from { height: 20%; } to { height: 100%; } }
.sound-label { font-family: var(--mono); font-size: 8px; letter-spacing: .12em; }
.archive-link { font-size: 12px; color: var(--muted); border: 1px solid var(--line); padding: 7px 12px; transition: border-color .25s, color .25s; }
.archive-link span { color: var(--accent); }
.archive-link:hover { color: var(--ink); border-color: var(--accent); }
.menu-btn { display: none; flex-direction: column; gap: 5px; width: 32px; }
.menu-btn span { width: 20px; height: 1px; background: currentColor; }
.scroll-progress { position: absolute; left: 0; bottom: -1px; height: 1px; width: 0; background: var(--accent); box-shadow: 0 0 10px var(--accent); transition: width .1s linear; }

/* ---------- chapter rail ---------- */
.chapter-rail {
  position: fixed; right: 18px; top: 50%; transform: translateY(-50%);
  z-index: 40; display: flex; flex-direction: column; align-items: flex-end; gap: 10px;
  pointer-events: none;
}
.chapter-rail__line { position: absolute; right: 8px; top: 8px; bottom: 46px; width: 1px; background: var(--line); }
.chapter-rail ol { display: flex; flex-direction: column; gap: 2px; pointer-events: auto; }
.chapter-rail li { display: flex; align-items: center; justify-content: flex-end; gap: 8px; height: 26px; }
.chapter-rail li a {
  font-family: var(--mono); font-size: 8px; color: var(--dim);
  width: 17px; height: 17px; display: grid; place-items: center;
  border: 1px solid transparent; border-radius: 50%; transition: all .3s;
}
.chapter-rail li span { font-family: var(--mono); font-size: 7px; letter-spacing: .12em; color: transparent; transition: color .3s, transform .3s; transform: translateX(4px); }
.chapter-rail li:hover span, .chapter-rail li.is-active span { color: var(--muted); transform: translateX(0); }
.chapter-rail li.is-active a { color: var(--bg); background: var(--accent); border-color: var(--accent); box-shadow: 0 0 16px rgba(var(--accent-rgb), .5); }
.chapter-rail__meta { display: flex; flex-direction: column; gap: 2px; margin-top: 10px; font-family: var(--mono); font-size: 6.5px; letter-spacing: .12em; color: rgba(236,231,220,.2); text-align: right; }

/* ---------- mobile menu ---------- */
.menu-panel {
  position: fixed; inset: 0; z-index: 200; background: rgba(5,7,13,.97);
  padding: 24px var(--pad) 40px; display: flex; flex-direction: column;
  opacity: 0; visibility: hidden; transform: translateY(-10px);
  transition: opacity .3s, visibility .3s, transform .3s;
  backdrop-filter: blur(20px);
}
.menu-panel.is-open { opacity: 1; visibility: visible; transform: translateY(0); }
.menu-panel__head { display: flex; justify-content: space-between; align-items: center; font-family: var(--mono); font-size: 10px; letter-spacing: .2em; color: var(--muted); padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.menu-panel__head button { background: none; border: 0; font-size: 30px; line-height: 1; color: var(--ink); }
.menu-panel nav { display: flex; flex-direction: column; margin-top: 10px; }
.menu-panel nav a { display: grid; grid-template-columns: 38px 1fr auto; align-items: baseline; gap: 12px; padding: 15px 0; border-bottom: 1px solid rgba(236,231,220,.08); font-family: var(--serif); font-size: 24px; }
.menu-panel nav a span { font-family: var(--mono); font-size: 9px; color: var(--accent); }
.menu-panel nav a small { font-family: var(--mono); font-size: 8px; color: var(--dim); letter-spacing: .15em; }
.menu-panel__foot { margin-top: auto; display: flex; justify-content: space-between; font-family: var(--mono); font-size: 8px; color: var(--dim); }

/* ---------- main / sections ---------- */
main { position: relative; z-index: 2; }
.section { position: relative; padding: clamp(86px, 12vh, 150px) 0; border-top: 1px solid rgba(236,231,220,.08); scroll-margin-top: 0; }
.section::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(to bottom, rgba(5,7,13,.58), rgba(5,7,13,.12) 18%, rgba(5,7,13,.05) 80%, rgba(5,7,13,.62));
}
.section__inner { position: relative; z-index: 1; max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
.section-head {
  display: grid; grid-template-columns: 112px minmax(0, 1.18fr) minmax(270px, .72fr);
  gap: clamp(20px, 4vw, 64px); align-items: end;
  padding-top: 20px; border-top: 1px solid var(--line-strong); margin-bottom: clamp(54px, 7vw, 96px);
}
.section-head__index { display: flex; flex-direction: column; gap: 10px; font-family: var(--mono); font-size: 8px; letter-spacing: .18em; color: var(--dim); }
.section-head__index span:first-child { font-family: var(--serif); font-size: 36px; line-height: 1; color: var(--accent); letter-spacing: 0; }
.section-head__index i { display: block; width: 34px; height: 1px; background: var(--accent); opacity: .6; }
.section-head__title { font-family: var(--serif); font-weight: 600; font-size: clamp(2.7rem, 4vw, 4.5rem); line-height: 1.12; letter-spacing: -.03em; }
.section-head__title em { font-style: italic; color: var(--accent); font-weight: 400; }
.section-head__lede { font-family: var(--serif); font-size: clamp(.95rem, 1.15vw, 1.08rem); line-height: 1.95; color: var(--muted); text-align: justify; }
.section-head__lede strong { color: var(--ink); font-weight: 600; }

.prose { max-width: 68ch; }
.prose p { font-family: var(--serif); font-size: clamp(1rem, 1.15vw, 1.12rem); line-height: 2.05; color: var(--ink-2); margin-bottom: 1.15em; text-align: justify; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose .dropcap::first-letter { float: left; font-family: var(--serif); font-size: 4.4em; line-height: .82; padding: .08em .12em 0 0; color: var(--accent); }
.prose a, .text-link { color: var(--accent); border-bottom: 1px solid rgba(var(--accent-rgb), .35); transition: border-color .2s; }
.prose a:hover, .text-link:hover { border-color: var(--accent); }
.text-link { display: inline-flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 10px; letter-spacing: .12em; padding-bottom: 3px; }
.text-link span { transition: transform .2s; }
.text-link:hover span { transform: translateX(4px); }

.eyebrow { display: flex; align-items: center; gap: 12px; font-family: var(--mono); font-size: 8.5px; letter-spacing: .18em; color: var(--muted); flex-wrap: wrap; }
.eyebrow__dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.eyebrow__rule { width: 44px; height: 1px; background: var(--line-strong); }

/* ---------- hero ---------- */
.hero {
  position: relative; min-height: 100svh; display: flex; flex-direction: column;
  justify-content: center; padding: 118px var(--pad) 104px; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse at 68% 42%, rgba(var(--accent-rgb), .06), transparent 34%);
}
.hero__grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.16fr) minmax(280px, .84fr); gap: 40px; max-width: var(--max); width: 100%; margin: 0 auto; align-items: center; }
.hero__copy { max-width: 760px; }
.hero__title { margin: 34px 0 30px; font-family: var(--serif); font-weight: 600; line-height: .92; letter-spacing: -.035em; }
.hero__line { display: block; }
.hero__line--cn { font-size: clamp(4.5rem, 11vw, 9.6rem); }
.hero__line--cn em { font-style: italic; font-weight: 400; color: var(--accent); font-size: .52em; vertical-align: .12em; padding: 0 .06em; letter-spacing: 0; }
.hero__line--en { margin-top: 18px; font-family: var(--sans); font-size: clamp(.95rem, 2.15vw, 1.6rem); font-weight: 300; letter-spacing: .42em; line-height: 1.5; color: var(--muted); border-top: 1px solid var(--line); padding-top: 14px; }
.hero__line--en i { font-family: var(--serif); color: var(--accent); font-style: italic; letter-spacing: 0; }
.hero__lede { font-family: var(--serif); font-size: clamp(1rem, 1.3vw, 1.15rem); line-height: 2.1; color: var(--ink-2); max-width: 45em; }
.hero__actions { display: flex; align-items: center; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 14px; padding: 14px 22px;
  border: 1px solid var(--line-strong); font-family: var(--mono); font-size: 10px;
  letter-spacing: .12em; background: transparent; color: var(--ink);
  transition: background .25s, color .25s, border-color .25s, transform .25s;
}
.btn span { color: var(--accent); font-size: 14px; line-height: 1; }
.btn--solid { background: var(--accent); color: #0b0d12; border-color: var(--accent); }
.btn--solid span { color: #0b0d12; }
.btn--solid:hover { background: var(--ink); border-color: var(--ink); transform: translateY(-2px); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn--small { padding: 9px 14px; font-size: 9px; }
.hero__stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 46px; border-top: 1px solid var(--line); }
.hero__stats > div { padding: 14px 16px 0 0; border-right: 1px solid var(--line); }
.hero__stats > div:last-child { border-right: 0; }
.hero__stats dt { font-size: 10px; color: var(--dim); letter-spacing: .08em; }
.hero__stats dd { margin-top: 3px; font-family: var(--serif); font-size: clamp(1.4rem, 2.2vw, 2.1rem); line-height: 1.2; color: var(--ink); }
.hero__stats dd small { font-family: var(--mono); font-size: 8px; color: var(--muted); }
.hero__stats dd sup { font-size: .5em; }
.hero__stage { position: relative; min-height: 380px; align-self: stretch; pointer-events: none; }
.stage-note { position: absolute; display: flex; flex-direction: column; gap: 4px; font-family: var(--mono); font-size: 7.5px; letter-spacing: .16em; color: var(--dim); }
.stage-note span:last-child { color: var(--muted); }
.stage-note--top { top: 8%; right: 0; text-align: right; }
.stage-note--right { right: 0; top: 50%; text-align: right; }
.stage-note--bottom { bottom: 2%; left: 0; }
.stage-note--bottom span:last-child { color: var(--accent); }
.stage-crosshair { position: absolute; top: 44%; right: 8%; width: 180px; height: 180px; opacity: .28; }
.stage-crosshair span { position: absolute; background: var(--accent); }
.stage-crosshair span:nth-child(1) { left: 50%; top: 0; width: 1px; height: 18px; }
.stage-crosshair span:nth-child(2) { left: 50%; bottom: 0; width: 1px; height: 18px; }
.stage-crosshair span:nth-child(3) { top: 50%; left: 0; height: 1px; width: 18px; }
.stage-crosshair span:nth-child(4) { top: 50%; right: 0; height: 1px; width: 18px; }
.hero__hud {
  position: relative; z-index: 1; max-width: var(--max); width: 100%; margin: 58px auto 0;
  display: grid; grid-template-columns: repeat(4, 1fr) 1.6fr;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: rgba(6,9,15,.32); backdrop-filter: blur(8px);
}
.hud-cell { padding: 12px 16px; border-right: 1px solid var(--line); display: flex; flex-direction: column; gap: 3px; }
.hud-cell:last-child { border-right: 0; }
.hud-cell span { font-family: var(--mono); font-size: 7px; letter-spacing: .16em; color: var(--dim); }
.hud-cell b { font-family: var(--mono); font-size: 11px; font-weight: 400; letter-spacing: .06em; color: var(--ink-2); }
.hud-cell b small { font-size: 8px; color: var(--muted); }
.hud-cell--wide b { font-family: var(--serif); font-size: 12px; letter-spacing: .04em; }
.hero__scroll { position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 10px; font-family: var(--mono); font-size: 7px; letter-spacing: .25em; color: var(--dim); }
.hero__scroll i { width: 1px; height: 34px; background: linear-gradient(to bottom, var(--accent), transparent); animation: scrollPulse 2s ease-in-out infinite; }
@keyframes scrollPulse { 0%, 100% { transform: scaleY(.4); transform-origin: top; opacity: .4; } 50% { transform: scaleY(1); opacity: 1; } }

/* ---------- overview ---------- */
.overview-intro { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); gap: clamp(34px, 6vw, 90px); align-items: start; margin-bottom: clamp(56px, 8vw, 100px); }
.overview-aside { border-left: 1px solid var(--line); padding-left: 26px; }
.aside-label { font-family: var(--mono); font-size: 8px; letter-spacing: .2em; color: var(--dim); margin-bottom: 22px; }
.pillar { display: grid; grid-template-columns: 34px 1fr; gap: 14px; padding: 17px 0; border-top: 1px solid var(--line); }
.pillar:last-of-type { border-bottom: 1px solid var(--line); }
.pillar__no { font-family: var(--serif); font-size: 24px; line-height: 1; color: var(--accent); font-style: italic; }
.pillar h3 { font-family: var(--serif); font-size: 19px; font-weight: 600; margin-bottom: 5px; }
.pillar p { font-size: 11.5px; line-height: 1.8; color: var(--muted); }
.aside-note { margin-top: 24px; }
.aside-note span { font-family: var(--mono); font-size: 8px; letter-spacing: .15em; color: var(--accent); }
.aside-note p { font-family: var(--serif); font-size: 12.5px; line-height: 1.8; color: var(--muted); margin-top: 7px; }

.scale-block { margin-bottom: clamp(56px, 8vw, 96px); padding: clamp(24px, 4vw, 40px); border: 1px solid var(--line); background: linear-gradient(135deg, rgba(12,17,28,.9), rgba(6,9,15,.72)); }
.scale-block__head { display: grid; grid-template-columns: 160px minmax(0, .9fr) minmax(260px, 1.1fr); gap: 24px; align-items: baseline; margin-bottom: 34px; }
.scale-block__head .mono { color: var(--accent); }
.scale-block__head h3 { font-family: var(--serif); font-size: clamp(1.35rem, 2vw, 1.8rem); font-weight: 600; }
.scale-block__head p { font-size: 11.5px; line-height: 1.8; color: var(--muted); }
.scale-ruler { position: relative; height: 150px; margin: 20px 10px 8px; border-top: 1px solid var(--line-strong); background: repeating-linear-gradient(to right, rgba(236,231,220,.12) 0 1px, transparent 1px calc(100% / 36)); }
.scale-tick { position: absolute; left: var(--p); top: 0; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 8px; }
.scale-tick::before { content: ""; width: 1px; height: 12px; background: var(--line-strong); }
.scale-tick b { font-family: var(--mono); font-size: 10px; font-weight: 400; color: var(--ink-2); white-space: nowrap; }
.scale-tick span { font-size: 9px; color: var(--dim); white-space: nowrap; }
.scale-band { position: absolute; bottom: 6px; height: 22px; border-top: 1px solid; border-bottom: 1px solid; display: flex; align-items: center; justify-content: center; font-family: var(--mono); font-size: 7px; letter-spacing: .15em; }
.scale-band--quantum { left: 0; width: 30%; border-color: rgba(105,215,230,.35); color: rgba(105,215,230,.7); }
.scale-band--both { left: 30%; width: 14%; border-color: rgba(236,231,220,.28); color: var(--muted); }
.scale-band--gr { left: 44%; width: 56%; border-color: rgba(216,178,106,.35); color: rgba(216,178,106,.7); }
.scale-caption { display: flex; justify-content: space-between; margin-top: 16px; font-family: var(--mono); font-size: 8px; letter-spacing: .1em; color: var(--dim); }

.compare-block { padding: clamp(24px, 4vw, 42px); border: 1px solid var(--line); background: rgba(7,10,17,.82); }
.compare-head { display: flex; align-items: baseline; gap: 24px; margin-bottom: 24px; }
.compare-head .mono { color: var(--accent); white-space: nowrap; }
.compare-head h3 { font-family: var(--serif); font-size: clamp(1.3rem, 2vw, 1.7rem); font-weight: 600; }
.compare-table { border-top: 1px solid var(--line-strong); }
.compare-row { display: grid; grid-template-columns: 140px 1fr 1fr; border-bottom: 1px solid var(--line); }
.compare-row > div { padding: 13px 16px; font-size: 11.5px; line-height: 1.65; color: var(--muted); border-right: 1px solid var(--line); }
.compare-row > div:first-child { color: var(--ink); font-family: var(--serif); font-size: 13px; }
.compare-row > div:last-child { border-right: 0; }
.compare-row--head > div { font-family: var(--mono); font-size: 8px; letter-spacing: .16em; color: var(--accent); padding-top: 10px; padding-bottom: 10px; }
.compare-note { margin-top: 18px; font-size: 10.5px; line-height: 1.7; color: var(--dim); max-width: 90ch; }
.section-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: clamp(54px, 8vw, 90px); border-top: 1px solid var(--line); padding-top: 18px; flex-wrap: wrap; }
.section-nav a { display: flex; align-items: baseline; gap: 14px; padding: 8px 0; transition: color .25s; }
.section-nav a span { font-family: var(--mono); font-size: 8px; letter-spacing: .12em; color: var(--dim); }
.section-nav a b { font-family: var(--serif); font-size: 16px; font-weight: 500; }
.section-nav a i { font-style: normal; color: var(--accent); transition: transform .25s; }
.section-nav a:hover { color: var(--accent); }
.section-nav a:hover i { transform: translateX(4px); }

/* ---------- relativity ---------- */
#relativity-special, #relativity-general, #quantum-old, #quantum-new, #concepts { scroll-margin-top: 92px; }
.chapter-marker { display: flex; align-items: flex-start; gap: 20px; margin: clamp(50px, 7vw, 90px) 0 30px; }
.chapter-marker__no { font-family: var(--serif); font-size: 62px; line-height: .8; color: var(--accent); font-style: italic; opacity: .7; }
.chapter-marker .mono { color: var(--dim); }
.chapter-marker h3 { font-family: var(--serif); font-size: clamp(1.6rem, 2.6vw, 2.35rem); font-weight: 600; margin-top: 7px; }
.rel-intro { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(250px, .55fr); gap: clamp(32px, 6vw, 90px); align-items: start; margin-bottom: 40px; }
.rel-intro--reverse { grid-template-columns: minmax(250px, .55fr) minmax(0, 1.2fr); }
.rel-intro--reverse .prose { order: 2; }
.pullquote { border-left: 1px solid var(--accent); padding: 8px 0 8px 24px; align-self: center; }
.pullquote p { font-family: var(--serif); font-style: italic; font-size: clamp(1.25rem, 2.2vw, 1.8rem); line-height: 1.5; color: var(--ink); }
.pullquote cite { display: block; margin-top: 12px; font-family: var(--mono); font-size: 8px; letter-spacing: .12em; color: var(--dim); font-style: normal; }
.postulates { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 38px 0 50px; }
.postulate { position: relative; padding: 28px; border: 1px solid var(--line); background: linear-gradient(145deg, rgba(16,21,33,.7), rgba(7,10,17,.38)); overflow: hidden; }
.postulate::after { content: ""; position: absolute; top: 0; right: 0; width: 60px; height: 60px; border-top: 1px solid rgba(var(--accent-rgb), .3); border-right: 1px solid rgba(var(--accent-rgb), .3); }
.postulate__no { font-family: var(--mono); font-size: 9px; color: var(--accent); letter-spacing: .15em; }
.postulate h3 { font-family: var(--serif); font-size: clamp(1.35rem, 2vw, 1.75rem); margin: 12px 0 8px; font-weight: 600; }
.postulate p { font-size: 12px; line-height: 1.9; color: var(--muted); max-width: 40ch; }
.postulate__diagram { margin-top: 20px; color: var(--accent); opacity: .8; }
.postulate__diagram svg { width: 100%; height: 88px; }

.train-thought { display: grid; grid-template-columns: minmax(0, 1fr) minmax(340px, .95fr); gap: clamp(24px, 5vw, 70px); align-items: center; padding: clamp(24px, 4vw, 40px); border: 1px solid var(--line); background: rgba(7,10,17,.55); margin-bottom: 40px; }
.train-thought__copy .mono { color: var(--accent); }
.train-thought__copy h3 { font-family: var(--serif); font-size: clamp(1.5rem, 2.4vw, 2rem); margin: 9px 0 14px; font-weight: 600; }
.train-thought__copy p { font-size: 12px; line-height: 1.9; color: var(--muted); margin-bottom: 10px; }
.train-thought__copy .small { font-size: 10.5px; color: var(--dim); }
.train-thought__art svg { width: 100%; height: auto; }

.equation { position: relative; border: 1px solid rgba(var(--accent-rgb), .28); background: rgba(7,10,17,.62); padding: clamp(24px, 4vw, 40px); margin: 40px 0; overflow: hidden; }
.equation::before { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse at 30% 40%, rgba(var(--accent-rgb), .07), transparent 60%); pointer-events: none; }
.equation__meta { display: flex; justify-content: space-between; gap: 20px; font-family: var(--mono); font-size: 8px; letter-spacing: .14em; color: var(--dim); }
.equation__meta span:first-child { color: var(--accent); }
.equation__body { padding: 34px 0 26px; text-align: center; }
.m--lg { font-size: clamp(1.5rem, 3.4vw, 2.7rem); line-height: 1.4; color: var(--ink); }
.m--xl { font-size: clamp(3rem, 7vw, 6rem); line-height: 1; color: var(--ink); }
.m--mega { font-size: clamp(4rem, 11vw, 9rem); line-height: 1; color: var(--ink); letter-spacing: -.03em; }
.frac { display: inline-flex; flex-direction: column; align-items: center; vertical-align: middle; margin: 0 .18em; font-size: .78em; line-height: 1.15; }
.frac > span:first-child { border-bottom: 1px solid currentColor; padding: 0 .18em .08em; }
.frac > span:last-child { padding-top: .08em; }
.equation__foot { display: grid; grid-template-columns: 1.3fr .7fr; gap: 24px; align-items: center; border-top: 1px solid var(--line); padding-top: 18px; }
.equation__foot p { font-size: 11.5px; line-height: 1.8; color: var(--muted); }
.equation__chips { display: flex; flex-direction: column; gap: 5px; font-family: var(--mono); font-size: 9px; color: var(--dim); text-align: right; }
.equation__legend { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 6px; }
.equation__legend > div { padding: 13px; background: rgba(7,10,17,.92); display: flex; flex-direction: column; gap: 4px; }
.equation__legend b { font-family: var(--serif); font-size: 16px; color: var(--accent); font-weight: 400; }
.equation__legend span { font-size: 9.5px; color: var(--muted); line-height: 1.5; }
.equation__note { font-size: 11px; line-height: 1.8; color: var(--dim); margin-top: 18px; }

/* ---------- labs ---------- */
.lab { border: 1px solid var(--line-strong); background: rgba(6,9,15,.92); margin: 48px 0; position: relative; scroll-margin-top: 64px; }
.lab::before, .lab::after { content: ""; position: absolute; width: 12px; height: 12px; border-color: var(--accent); opacity: .55; pointer-events: none; }
.lab::before { top: -1px; left: -1px; border-top: 1px solid; border-left: 1px solid; }
.lab::after { bottom: -1px; right: -1px; border-bottom: 1px solid; border-right: 1px solid; }
.lab__head { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; padding: 22px clamp(20px, 3vw, 32px); border-bottom: 1px solid var(--line); }
.lab__head .mono { color: var(--accent); }
.lab__head h3 { font-family: var(--serif); font-size: clamp(1.25rem, 2.2vw, 1.7rem); font-weight: 600; margin-top: 7px; }
.lab__status { display: flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: 7px; letter-spacing: .14em; color: var(--dim); white-space: nowrap; padding-top: 6px; }
.lab__status i { width: 5px; height: 5px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px var(--green); animation: blink 2s ease-in-out infinite; }
@keyframes blink { 0%, 100% { opacity: .35; } 50% { opacity: 1; } }
.lab__grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr); }
.lab__grid--wide { grid-template-columns: minmax(0, 1.3fr) minmax(310px, .7fr); }
.lab__visual { position: relative; border-right: 1px solid var(--line); min-width: 0; background: rgba(4,6,11,.72); }
.lab__visual--3d { background: radial-gradient(ellipse at 50% 60%, rgba(105,215,230,.045), transparent 65%); }
.lab-canvas-wrap { position: relative; width: 100%; height: 100%; min-height: 360px; }
.lab-canvas-wrap canvas { width: 100%; height: 100%; position: absolute; inset: 0; }
.lab-canvas-wrap--tall { min-height: 430px; }
.lab-canvas-wrap--square { min-height: 440px; }
.lab-canvas-wrap--slit { min-height: 430px; }
.lab-canvas-wrap--3d { min-height: 470px; touch-action: none; }
.lab__legend { position: absolute; left: 18px; right: 18px; bottom: 14px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; font-family: var(--mono); font-size: 7.5px; letter-spacing: .08em; color: var(--dim); pointer-events: none; }
.lab__legend > span { display: flex; align-items: center; gap: 6px; }
.lab__hint { margin-left: auto; color: rgba(236,231,220,.28); }
.dot { width: 6px; height: 6px; border-radius: 50%; display: inline-block; }
.dot--gold { background: var(--gold); box-shadow: 0 0 8px var(--gold); }
.dot--cyan { background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.dot--pink { background: var(--rose); box-shadow: 0 0 8px var(--rose); }
.lab__side { padding: clamp(20px, 3vw, 32px); min-width: 0; }
.readout-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); margin-bottom: 24px; }
.readout { background: rgba(7,10,17,.9); padding: 12px 14px; display: flex; flex-direction: column; gap: 5px; }
.readout span { font-family: var(--mono); font-size: 7.5px; letter-spacing: .1em; color: var(--dim); }
.readout b { font-family: var(--mono); font-size: 16px; font-weight: 400; color: var(--ink); line-height: 1.2; }
.readout b small { font-size: 8px; color: var(--muted); }
.readout-grid--compact .readout b { font-size: 13px; }
.range-label { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; margin: 18px 0 8px; font-size: 11px; color: var(--muted); }
.range-label b { font-family: var(--mono); font-size: 11px; font-weight: 400; color: var(--accent); }
.range { -webkit-appearance: none; appearance: none; width: 100%; height: 20px; background: transparent; margin: 0 0 6px; }
.range::-webkit-slider-runnable-track { height: 2px; background: linear-gradient(to right, var(--accent) 0 var(--fill, 50%), rgba(236,231,220,.14) var(--fill, 50%) 100%); }
.range::-moz-range-track { height: 2px; background: rgba(236,231,220,.14); }
.range::-moz-range-progress { height: 2px; background: var(--accent); }
.range::-webkit-slider-thumb { -webkit-appearance: none; width: 11px; height: 11px; margin-top: -4.5px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px rgba(var(--accent-rgb), .8); border: 2px solid var(--bg); }
.range::-moz-range-thumb { width: 11px; height: 11px; border-radius: 50%; background: var(--accent); border: 2px solid var(--bg); }
.preset-row { display: flex; gap: 6px; margin: 12px 0 18px; }
.preset-row button { flex: 1; background: transparent; border: 1px solid var(--line); padding: 6px 4px; font-family: var(--mono); font-size: 8px; color: var(--muted); transition: all .2s; }
.preset-row button:hover, .preset-row button.is-active { border-color: var(--accent); color: var(--accent); }
.lab__note { font-size: 10.5px; line-height: 1.8; color: var(--muted); border-left: 1px solid var(--line-strong); padding-left: 12px; }
.muon-box { margin-top: 22px; padding: 14px; border: 1px solid var(--line); background: rgba(12,17,28,.5); }
.muon-box .mono { color: var(--accent); }
.muon-box p { font-size: 10px; line-height: 1.7; color: var(--muted); margin-top: 6px; }
.muon-box b { color: var(--ink); }
.lab__overlay { position: absolute; top: 16px; left: 18px; display: flex; flex-direction: column; gap: 4px; font-family: var(--mono); font-size: 8px; letter-spacing: .1em; color: var(--dim); pointer-events: none; }
.lab__overlay b { color: var(--accent); font-weight: 400; font-size: 10px; }
.toggle-list { display: flex; flex-direction: column; gap: 10px; margin: 16px 0 20px; }
.toggle { display: flex; align-items: center; gap: 10px; font-size: 11px; color: var(--muted); cursor: pointer; user-select: none; }
.toggle input { position: absolute; opacity: 0; pointer-events: none; }
.toggle > span { width: 28px; height: 15px; border: 1px solid var(--line-strong); position: relative; flex-shrink: 0; transition: border-color .2s; }
.toggle > span::after { content: ""; position: absolute; top: 2px; left: 2px; width: 9px; height: 9px; background: var(--dim); transition: transform .2s, background .2s; }
.toggle input:checked + span { border-color: var(--accent); }
.toggle input:checked + span::after { transform: translateX(13px); background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.toggle--big { font-size: 12px; color: var(--ink); padding: 10px 0; border-bottom: 1px solid var(--line); }
.toggle-note { font-size: 10px; line-height: 1.7; color: var(--dim); margin: 8px 0 16px; }
.slit-actions { display: flex; gap: 8px; margin-top: 16px; }
.slit-actions .btn { flex: 1; justify-content: center; }

/* ---------- consequences / emc2 ---------- */
.consequences { margin: 56px 0; }
.consequences__head { display: flex; align-items: baseline; gap: 22px; margin-bottom: 24px; }
.consequences__head .mono { color: var(--accent); white-space: nowrap; }
.consequences__head h3 { font-family: var(--serif); font-size: clamp(1.35rem, 2.2vw, 1.8rem); font-weight: 600; }
.consequence-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.consequence { background: rgba(7,10,17,.82); padding: 22px; display: flex; flex-direction: column; gap: 9px; min-height: 190px; transition: background .25s; }
.consequence:hover { background: rgba(var(--accent-rgb), .05); }
.consequence > span { font-family: var(--mono); font-size: 8px; color: var(--accent); }
.consequence h4 { font-family: var(--serif); font-size: 17px; font-weight: 600; }
.consequence p { font-size: 10.5px; line-height: 1.75; color: var(--muted); flex: 1; }
.mini-eq { font-family: var(--mono); font-size: 9px; color: var(--accent); letter-spacing: .02em; padding-top: 8px; border-top: 1px solid var(--line); }
.mini-eq--lg { font-size: 12px; line-height: 1.5; border-top: 0; padding-top: 0; color: var(--ink-2); }
.emc2-block { display: grid; grid-template-columns: minmax(300px, .8fr) minmax(0, 1.2fr); gap: clamp(28px, 6vw, 80px); align-items: center; padding: clamp(30px, 5vw, 56px); margin: 48px 0; border: 1px solid rgba(var(--accent-rgb), .25); background: radial-gradient(ellipse at 20% 50%, rgba(var(--accent-rgb), .09), transparent 60%), rgba(7,10,17,.55); }
.emc2-block__eq { display: flex; flex-direction: column; gap: 10px; }
.emc2-block__eq .mono { color: var(--accent); }
.emc2-block__sub { font-family: var(--mono); font-size: 8px; letter-spacing: .1em; color: var(--dim); }
.emc2-block__copy h3 { font-family: var(--serif); font-size: clamp(1.4rem, 2.2vw, 1.8rem); font-weight: 600; margin-bottom: 12px; }
.emc2-block__copy p { font-size: 12px; line-height: 1.9; color: var(--muted); margin-bottom: 10px; }
.emc2-block__copy b { color: var(--ink); }

/* ---------- equivalence / tests / black hole / cosmology ---------- */
.equivalence-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 36px 0 50px; }
.equivalence-card { display: grid; grid-template-columns: 1fr; border: 1px solid var(--line); background: rgba(7,10,17,.55); overflow: hidden; }
.equivalence-card__art { border-bottom: 1px solid var(--line); padding: 8px; background: radial-gradient(ellipse at 50% 40%, rgba(var(--accent-rgb), .05), transparent 65%); }
.equivalence-card__art svg { width: 100%; height: 150px; }
.equivalence-card > div:last-child { padding: 20px; }
.equivalence-card .mono { color: var(--accent); }
.equivalence-card h4 { font-family: var(--serif); font-size: 18px; margin: 7px 0 6px; font-weight: 600; }
.equivalence-card p { font-size: 11px; line-height: 1.8; color: var(--muted); }
.tests-block { margin: 60px 0; }
.tests-block__head { display: grid; grid-template-columns: 190px 1fr 1fr; gap: 24px; align-items: baseline; margin-bottom: 22px; }
.tests-block__head .mono { color: var(--accent); }
.tests-block__head h3 { font-family: var(--serif); font-size: clamp(1.4rem, 2.2vw, 1.9rem); font-weight: 600; }
.tests-block__head p { font-size: 11px; line-height: 1.8; color: var(--muted); }
.tests-list { border-top: 1px solid var(--line-strong); }
.test-row { display: grid; grid-template-columns: 70px 1fr 110px; gap: 20px; align-items: center; padding: 17px 0; border-bottom: 1px solid var(--line); }
.test-row__year { font-family: var(--mono); font-size: 10px; color: var(--accent); }
.test-row h4 { font-family: var(--serif); font-size: 16px; font-weight: 600; margin-bottom: 3px; }
.test-row p { font-size: 10.5px; line-height: 1.7; color: var(--muted); }
.test-row > b { font-family: var(--mono); font-size: 8px; color: var(--green); text-align: right; font-weight: 400; }
.tests-block__note { margin-top: 16px; font-size: 10px; color: var(--dim); line-height: 1.7; }
.blackhole-block { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr); gap: clamp(30px, 6vw, 80px); align-items: center; margin: 70px 0; padding: clamp(26px, 4vw, 44px); border: 1px solid rgba(var(--accent-rgb), .22); background: rgba(5,8,14,.55); }
.blackhole-block__copy .mono { color: var(--accent); }
.blackhole-block__copy h3 { font-family: var(--serif); font-size: clamp(1.7rem, 3vw, 2.5rem); font-weight: 600; margin: 8px 0 14px; }
.blackhole-block__copy p { font-size: 12px; line-height: 1.9; color: var(--muted); margin-bottom: 10px; }
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); margin-top: 22px; border: 1px solid var(--line); }
.stat-row > div { background: rgba(7,10,17,.9); padding: 12px; display: flex; flex-direction: column; gap: 4px; }
.stat-row span { font-size: 8.5px; color: var(--dim); }
.stat-row b { font-family: var(--mono); font-size: 12px; color: var(--accent); font-weight: 400; }
.blackhole-block__art svg { width: 100%; height: auto; }
.cosmology-block { margin: 60px 0 30px; }
.cosmology-block__head { display: grid; grid-template-columns: 190px 1fr 1fr; gap: 24px; align-items: baseline; margin-bottom: 24px; }
.cosmology-block__head .mono { color: var(--accent); }
.cosmology-block__head h3 { font-family: var(--serif); font-size: clamp(1.5rem, 2.4vw, 2rem); font-weight: 600; }
.cosmology-block__head p { font-size: 11px; line-height: 1.8; color: var(--muted); }
.cosmology-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.cosmology-card { background: rgba(7,10,17,.85); padding: 24px; display: flex; flex-direction: column; gap: 14px; }
.cosmology-card .mono { color: var(--dim); }
.cosmology-card p { font-size: 10.5px; line-height: 1.8; color: var(--muted); }
.energy-pie { display: flex; flex-direction: column; gap: 7px; font-size: 10px; color: var(--muted); }
.energy-pie > span { width: 64px; height: 64px; border-radius: 50%; background: conic-gradient(var(--accent) 0 68%, var(--cyan) 68% 95%, var(--rose) 95% 100%); margin-bottom: 6px; }
.energy-pie div b { color: var(--ink); font-family: var(--mono); font-weight: 400; margin-right: 8px; }
.cosmic-timeline { display: flex; flex-direction: column; }
.cosmic-timeline li { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; border-bottom: 1px solid var(--line); font-size: 9.5px; color: var(--muted); }
.cosmic-timeline b { font-family: var(--mono); color: var(--accent); font-weight: 400; }
.cosmology-note { margin-top: 16px; font-size: 10px; color: var(--dim); line-height: 1.7; }

/* ---------- quantum ---------- */
.quantum-intro { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, .6fr); gap: clamp(34px, 6vw, 90px); align-items: start; margin-bottom: 44px; }
.quantum-quote { border-left: 1px solid var(--accent); padding-left: 24px; align-self: center; }
.quantum-quote .mono { color: var(--accent); }
.quantum-quote blockquote { font-family: var(--serif); font-size: clamp(1.2rem, 2vw, 1.6rem); line-height: 1.55; font-style: italic; margin: 16px 0 12px; }
.quantum-quote cite { font-family: var(--mono); font-size: 8px; color: var(--dim); font-style: normal; letter-spacing: .1em; }
.quantum-quote__line { width: 34px; height: 1px; background: var(--accent); margin: 20px 0 14px; opacity: .6; }
.quantum-quote > p { font-size: 11px; line-height: 1.8; color: var(--muted); }
.old-quantum { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-bottom: 34px; }
.old-card { background: rgba(7,10,17,.82); padding: 20px; display: flex; flex-direction: column; gap: 8px; min-height: 210px; transition: background .25s; }
.old-card:hover { background: rgba(var(--accent-rgb), .045); }
.old-card__year { font-family: var(--mono); font-size: 9px; color: var(--accent); letter-spacing: .1em; }
.old-card h4 { font-family: var(--serif); font-size: 17px; font-weight: 600; }
.old-card p { font-size: 10px; line-height: 1.75; color: var(--muted); flex: 1; }
.dual-theory { display: grid; grid-template-columns: 1fr 56px 1fr; gap: 0; align-items: stretch; margin-bottom: 36px; }
.theory-card { border: 1px solid var(--line); background: rgba(7,10,17,.62); padding: clamp(22px, 3vw, 32px); }
.theory-card--matrix { border-top-color: rgba(216,178,106,.5); }
.theory-card--wave { border-top-color: rgba(105,215,230,.5); }
.theory-card__head { display: flex; justify-content: space-between; align-items: center; }
.theory-card__head .mono { color: var(--dim); }
.theory-card__no { font-family: var(--serif); font-size: 26px; color: var(--accent); font-style: italic; }
.theory-card h3 { font-family: var(--serif); font-size: clamp(1.45rem, 2.2vw, 1.9rem); margin: 14px 0 10px; font-weight: 600; }
.theory-card p { font-size: 11px; line-height: 1.9; color: var(--muted); margin-bottom: 14px; }
.theory-card .mini-eq { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 12px 0; margin-bottom: 10px; font-size: 11px; }
.theory-card__note { font-size: 10px !important; color: var(--dim) !important; margin-bottom: 0 !important; }
.theory-vs { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; font-family: var(--mono); font-size: 7px; color: var(--dim); }
.theory-vs i { width: 1px; height: 38px; background: linear-gradient(to bottom, transparent, var(--accent), transparent); }
.wavefunction-block { display: grid; grid-template-columns: minmax(280px, .72fr) minmax(0, 1.28fr); gap: clamp(28px, 6vw, 80px); align-items: center; padding: clamp(26px, 4vw, 42px); border: 1px solid rgba(var(--accent-rgb), .22); background: rgba(7,10,17,.55); margin: 38px 0 48px; }
.wavefunction-block__eq { display: flex; flex-direction: column; gap: 14px; text-align: center; }
.wavefunction-block__eq .mono { color: var(--accent); text-align: left; }
.wavefunction-block__complex { font-family: var(--mono); font-size: 8px; letter-spacing: .08em; color: var(--dim); }
.wavefunction-block__copy p { font-size: 11.5px; line-height: 1.9; color: var(--muted); margin-bottom: 10px; }
.formula-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 18px; }
.formula-strip > div { background: rgba(7,10,17,.9); padding: 10px; display: flex; flex-direction: column; gap: 4px; }
.formula-strip b { font-family: var(--serif); font-size: 15px; font-weight: 400; color: var(--accent); }
.formula-strip span { font-size: 9px; color: var(--dim); }
.orbital-tabs { display: flex; gap: 1px; background: var(--line); border: 1px solid var(--line); margin-bottom: 22px; }
.orbital-tabs button { flex: 1; background: rgba(7,10,17,.9); border: 0; padding: 10px; font-family: var(--mono); font-size: 11px; color: var(--muted); transition: all .2s; }
.orbital-tabs button:hover, .orbital-tabs button.is-active { background: var(--accent); color: var(--bg); }
.orbital-info .mono { color: var(--accent); }
.orbital-info h4 { font-family: var(--serif); font-size: 22px; margin: 8px 0 7px; font-weight: 600; }
.orbital-info p { font-size: 10.5px; line-height: 1.8; color: var(--muted); margin-bottom: 18px; }
.concept-section { margin: 60px 0; }
.concept-section__head { display: grid; grid-template-columns: 190px 1fr 1.1fr; gap: 24px; align-items: baseline; margin-bottom: 24px; }
.concept-section__head .mono { color: var(--accent); }
.concept-section__head h3 { font-family: var(--serif); font-size: clamp(1.4rem, 2.2vw, 1.9rem); font-weight: 600; }
.concept-section__head p { font-size: 11px; line-height: 1.8; color: var(--muted); }
.concept-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.concept-card { background: rgba(7,10,17,.82); padding: 18px; display: flex; flex-direction: column; gap: 8px; min-height: 160px; cursor: pointer; transition: background .25s; text-align: left; border: 0; color: inherit; }
.concept-card:hover { background: rgba(var(--accent-rgb), .06); }
.concept-card__top { display: flex; justify-content: space-between; gap: 8px; font-family: var(--mono); font-size: 7px; letter-spacing: .1em; color: var(--dim); }
.concept-card__top span:last-child { color: var(--accent); opacity: 0; transition: opacity .2s; }
.concept-card:hover .concept-card__top span:last-child { opacity: 1; }
.concept-card h4 { font-family: var(--serif); font-size: 16px; font-weight: 600; line-height: 1.4; }
.concept-card .mini-eq { padding-top: 6px; font-size: 8px; }
.concept-card p { font-size: 10px; line-height: 1.7; color: var(--muted); max-height: 0; overflow: hidden; opacity: 0; transition: max-height .35s var(--ease), opacity .25s; }
.concept-card.is-open p { max-height: 140px; opacity: 1; }
.entanglement-block { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr); gap: clamp(28px, 6vw, 70px); align-items: center; margin: 64px 0; padding: clamp(24px, 4vw, 40px); border: 1px solid rgba(var(--accent-rgb), .22); background: rgba(7,10,17,.55); }
.entanglement-block__copy .mono { color: var(--accent); }
.entanglement-block__copy h3 { font-family: var(--serif); font-size: clamp(1.6rem, 2.6vw, 2.2rem); font-weight: 600; margin: 8px 0 14px; }
.entanglement-block__copy p { font-size: 11.5px; line-height: 1.9; color: var(--muted); margin-bottom: 10px; }
.bell-eq { margin: 20px 0 16px; padding: 16px; border: 1px solid var(--line); background: rgba(5,8,14,.6); }
.bell-eq .mono { font-size: 8px; color: var(--dim); }
.bell-eq .m { margin-top: 8px; font-size: 14px; color: var(--ink); }
.bell-eq__vs { font-family: var(--mono); font-size: 8px; font-style: normal; color: var(--dim); }
.bell-eq__q { color: var(--accent); }
.entanglement-block__art svg { width: 100%; height: auto; }
.qft-block { margin: 64px 0; }
.qft-block__head { display: grid; grid-template-columns: 200px 1fr 1.1fr; gap: 24px; align-items: baseline; margin-bottom: 24px; }
.qft-block__head .mono { color: var(--accent); }
.qft-block__head h3 { font-family: var(--serif); font-size: clamp(1.5rem, 2.4vw, 2rem); font-weight: 600; }
.qft-block__head p { font-size: 11px; line-height: 1.8; color: var(--muted); }
.qft-grid { display: grid; grid-template-columns: 1.2fr .9fr .9fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.qft-card { background: rgba(7,10,17,.85); padding: 24px; display: flex; flex-direction: column; gap: 10px; }
.qft-card .mono { color: var(--dim); }
.qft-card h4 { font-family: var(--serif); font-size: 18px; font-weight: 600; }
.qft-card p { font-size: 10.5px; line-height: 1.8; color: var(--muted); }
.particle-table { display: flex; flex-direction: column; gap: 5px; }
.particle-table > div { display: grid; grid-template-columns: auto 1fr auto 1fr auto 1fr; gap: 4px 8px; align-items: baseline; border-bottom: 1px solid var(--line); padding-bottom: 5px; }
.particle-table b { font-family: var(--serif); font-size: 12px; font-weight: 500; color: var(--ink); }
.particle-table span { font-family: var(--mono); font-size: 9px; color: var(--accent); }
.boson-list { display: flex; flex-direction: column; gap: 0; }
.boson-list li { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 11px; }
.boson-list b { font-weight: 500; color: var(--ink); }
.boson-list span { font-family: var(--mono); font-size: 8px; color: var(--dim); }
.quantum-tech { margin: 60px 0; }
.quantum-tech__head { display: flex; align-items: baseline; gap: 22px; margin-bottom: 24px; }
.quantum-tech__head .mono { color: var(--accent); white-space: nowrap; }
.quantum-tech__head h3 { font-family: var(--serif); font-size: clamp(1.35rem, 2.2vw, 1.8rem); font-weight: 600; }
.tech-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.tech-card { background: rgba(7,10,17,.82); padding: 20px; min-height: 150px; }
.tech-card > span { font-family: var(--mono); font-size: 8px; color: var(--accent); }
.tech-card h4 { font-family: var(--serif); font-size: 17px; font-weight: 600; margin: 8px 0 6px; }
.tech-card p { font-size: 10px; line-height: 1.75; color: var(--muted); }

/* ---------- history ---------- */
.history-feature { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr); gap: clamp(26px, 5vw, 64px); align-items: center; margin-bottom: clamp(50px, 7vw, 80px); }
.history-photo { border: 1px solid var(--line); background: rgba(7,10,17,.6); padding: 10px; }
.history-photo img { width: 100%; aspect-ratio: 16/10; object-fit: cover; filter: grayscale(1) contrast(1.05) sepia(.15); opacity: .92; transition: filter .5s, opacity .5s; }
.history-photo:hover img { filter: grayscale(.65) contrast(1.05) sepia(.1); opacity: 1; }
.history-photo figcaption { padding: 12px 4px 3px; font-size: 9.5px; line-height: 1.7; color: var(--dim); }
.history-photo figcaption span { display: block; font-family: var(--mono); font-size: 8px; letter-spacing: .12em; color: var(--accent); margin-bottom: 3px; }
.history-feature__copy .mono { color: var(--accent); }
.history-feature__copy h3 { font-family: var(--serif); font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 600; margin: 9px 0 14px; }
.history-feature__copy p { font-size: 11.5px; line-height: 1.9; color: var(--muted); margin-bottom: 11px; }
.history-feature__meta { display: flex; gap: 20px; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 14px; margin-top: 18px; }
.history-feature__meta span { display: flex; align-items: baseline; gap: 6px; font-size: 9px; color: var(--dim); }
.history-feature__meta b { font-family: var(--serif); font-size: 19px; font-weight: 400; color: var(--accent); }
.history-controls { display: flex; justify-content: space-between; align-items: center; gap: 20px; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line); padding: 13px 0; margin-bottom: 8px; flex-wrap: wrap; }
.filters { display: flex; gap: 4px; flex-wrap: wrap; }
.filters button { background: transparent; border: 1px solid transparent; color: var(--muted); padding: 7px 12px; font-size: 10.5px; transition: all .2s; }
.filters button span { font-family: var(--mono); font-size: 7px; color: var(--dim); margin-left: 4px; }
.filters button:hover { color: var(--ink); }
.filters button.is-active { border-color: var(--accent); color: var(--accent); background: rgba(var(--accent-rgb), .05); }
.filters button.is-active span { color: var(--accent); }
.history-count { display: flex; gap: 18px; font-family: var(--mono); font-size: 8px; color: var(--dim); letter-spacing: .08em; }
.timeline { position: relative; margin: 0 0 50px; }
.timeline::before { content: ""; position: absolute; left: 92px; top: 0; bottom: 0; width: 1px; background: linear-gradient(to bottom, transparent, var(--line-strong) 6%, var(--line-strong) 94%, transparent); }
.timeline-item { display: grid; grid-template-columns: 72px 40px minmax(0, 1fr); gap: 0; position: relative; padding: 18px 0; border-bottom: 1px solid rgba(236,231,220,.07); transition: opacity .3s, transform .3s; }
.timeline-item.is-hidden { display: none; }
.timeline-item__year { font-family: var(--mono); font-size: 12px; color: var(--accent); padding-top: 2px; }
.timeline-item__dot { position: relative; display: flex; justify-content: center; }
.timeline-item__dot i { width: 7px; height: 7px; border-radius: 50%; background: var(--bg); border: 1px solid var(--accent); margin-top: 6px; position: relative; z-index: 1; transition: background .25s, box-shadow .25s; }
.timeline-item:hover .timeline-item__dot i { background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.timeline-item__body { padding-left: 20px; }
.timeline-item__top { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.timeline-item__top h4 { font-family: var(--serif); font-size: clamp(1.05rem, 1.5vw, 1.25rem); font-weight: 600; }
.timeline-item__top .mono { font-size: 7.5px; color: var(--dim); }
.timeline-item__field { border: 1px solid var(--line); padding: 2px 6px; font-family: var(--mono); font-size: 7px; color: var(--muted); white-space: nowrap; }
.timeline-item p { margin-top: 7px; font-size: 11px; line-height: 1.8; color: var(--muted); max-width: 86ch; }
.timeline-item__note { display: block; margin-top: 6px; font-size: 9.5px; color: var(--dim); font-style: italic; }
.timeline-item__note::before { content: "↳ "; color: var(--accent); }
.history-essay { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 50px 0; }
.history-essay article { background: rgba(7,10,17,.92); padding: 24px; }
.history-essay .mono { color: var(--accent); }
.history-essay h3 { font-family: var(--serif); font-size: 18px; font-weight: 600; margin: 10px 0 8px; }
.history-essay p { font-size: 10.5px; line-height: 1.8; color: var(--muted); }
.archive-gap { border: 1px solid var(--line); background: rgba(7,10,17,.55); padding: clamp(24px, 4vw, 38px); }
.archive-gap__head { display: flex; align-items: baseline; gap: 20px; margin-bottom: 22px; }
.archive-gap__head .mono { color: var(--accent); white-space: nowrap; }
.archive-gap__head h3 { font-family: var(--serif); font-size: clamp(1.3rem, 2.2vw, 1.8rem); font-weight: 600; }
.archive-gap__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.archive-gap__grid > div { background: rgba(7,10,17,.9); padding: 18px; display: flex; flex-direction: column; gap: 5px; }
.archive-gap__grid b { font-family: var(--serif); font-size: 15px; font-weight: 600; color: var(--accent); }
.archive-gap__grid span { font-size: 10.5px; line-height: 1.75; color: var(--muted); }
.archive-gap__note { font-size: 10px; line-height: 1.7; color: var(--dim); margin-top: 14px; }

/* ---------- people ---------- */
.people-map { display: grid; grid-template-columns: minmax(280px, .75fr) minmax(0, 1.25fr); gap: clamp(24px, 5vw, 60px); align-items: center; border: 1px solid var(--line); background: rgba(7,10,17,.86); padding: clamp(22px, 4vw, 36px); margin-bottom: 36px; }
.people-map__intro .mono { color: var(--accent); }
.people-map__intro h3 { font-family: var(--serif); font-size: clamp(1.4rem, 2.4vw, 1.9rem); font-weight: 600; margin: 8px 0 10px; }
.people-map__intro p { font-size: 11px; line-height: 1.8; color: var(--muted); }
.people-map__nodes { position: relative; min-height: 250px; color: var(--accent); }
.people-map__nodes > svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.people-map__nodes > div { position: absolute; left: var(--x); top: var(--y); transform: translate(-50%, -50%); display: flex; flex-direction: column; gap: 2px; padding: 7px 9px; background: rgba(5,8,14,.82); border: 1px solid var(--line); backdrop-filter: blur(4px); }
.people-map__nodes b { font-family: var(--serif); font-size: 12px; font-weight: 600; color: var(--ink); white-space: nowrap; }
.people-map__nodes span { font-family: var(--mono); font-size: 6.5px; letter-spacing: .05em; color: var(--dim); white-space: nowrap; }
.people-controls { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin: 30px 0 24px; flex-wrap: wrap; border-bottom: 1px solid var(--line); padding-bottom: 12px; }
.people-hint { font-family: var(--mono); font-size: 8px; letter-spacing: .08em; color: var(--dim); }
.people-hint span { color: var(--accent); }
.people-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.person-card { position: relative; border: 1px solid var(--line); background: rgba(7,10,17,.7); overflow: hidden; cursor: pointer; text-align: left; color: inherit; padding: 0; transition: border-color .3s, transform .3s; }
.person-card:hover { border-color: rgba(var(--accent-rgb), .55); transform: translateY(-4px); }
.person-card__photo { position: relative; aspect-ratio: 3/3.8; overflow: hidden; background: linear-gradient(145deg, #111827, #06080d); }
.person-card__photo img { width: 100%; height: 100%; object-fit: cover; object-position: var(--pos, 50% 25%); filter: grayscale(1) contrast(1.04); opacity: .82; transition: transform .7s var(--ease), filter .5s, opacity .5s; }
.person-card:hover .person-card__photo img { transform: scale(1.045); filter: grayscale(.55) contrast(1.03); opacity: 1; }
.person-card__photo::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 40%, rgba(5,7,13,.2) 62%, rgba(5,7,13,.94)); pointer-events: none; }
.person-card__fallback { position: absolute; inset: 0; display: grid; place-items: center; font-family: var(--serif); font-size: 18px; letter-spacing: .16em; color: rgba(var(--accent-rgb), .38); background: radial-gradient(ellipse at 50% 40%, rgba(var(--accent-rgb), .08), transparent 60%); opacity: .15; transition: opacity .3s, font-size .3s; }
.person-card__tag { position: absolute; top: 10px; left: 10px; z-index: 2; font-family: var(--mono); font-size: 7px; letter-spacing: .1em; color: var(--accent); border: 1px solid rgba(var(--accent-rgb), .35); padding: 3px 6px; background: rgba(5,7,13,.55); backdrop-filter: blur(4px); }
.person-card__num { position: absolute; top: 8px; right: 10px; z-index: 2; font-family: var(--mono); font-size: 8px; color: rgba(236,231,220,.5); }
.person-card__body { position: absolute; left: 0; right: 0; bottom: 0; z-index: 2; padding: 14px; }
.person-card__body h3 { font-family: var(--serif); font-size: clamp(1.05rem, 1.5vw, 1.3rem); font-weight: 600; line-height: 1.25; }
.person-card__body .en { display: block; font-family: var(--mono); font-size: 7px; letter-spacing: .08em; color: var(--dim); margin-top: 3px; }
.person-card__body .years { display: block; font-family: var(--mono); font-size: 8px; color: var(--accent); margin-top: 6px; }
.person-card__summary { font-size: 9px; line-height: 1.6; color: var(--muted); max-height: 0; overflow: hidden; opacity: 0; transition: max-height .35s var(--ease), opacity .25s, margin .35s; }
.person-card:hover .person-card__summary, .person-card:focus-visible .person-card__summary { max-height: 60px; opacity: 1; margin-top: 6px; }
.nobel-strip { display: grid; grid-template-columns: 200px 1fr auto; gap: 26px; align-items: center; margin: 48px 0 20px; padding: 22px 0; border-top: 1px solid rgba(var(--accent-rgb), .35); border-bottom: 1px solid rgba(var(--accent-rgb), .35); }
.nobel-strip .mono { color: var(--accent); }
.nobel-strip h3 { font-family: var(--serif); font-size: 20px; font-weight: 600; margin-top: 5px; }
.nobel-strip p { font-size: 10.5px; line-height: 1.75; color: var(--muted); }
.people-disclaimer { margin-top: 22px; font-size: 9.5px; line-height: 1.7; color: var(--dim); }
.people-disclaimer a { color: var(--accent); border-bottom: 1px solid rgba(var(--accent-rgb), .3); }

/* ---------- experiments ---------- */
.evidence-gallery { display: grid; grid-template-columns: 1.25fr .75fr; grid-template-rows: auto auto; gap: 12px; margin-bottom: 42px; }
.evidence-photo { border: 1px solid var(--line); background: rgba(7,10,17,.62); padding: 8px; min-width: 0; }
.evidence-photo--wide { grid-row: span 2; }
.evidence-photo img { width: 100%; height: 100%; aspect-ratio: 16/10; object-fit: cover; filter: grayscale(.9) contrast(1.05) sepia(.12); opacity: .86; transition: filter .5s, opacity .5s; }
.evidence-photo--wide img { aspect-ratio: auto; min-height: 100%; }
.evidence-photo:hover img { filter: grayscale(.5) contrast(1.03) sepia(.06); opacity: 1; }
.evidence-photo figcaption { padding: 9px 3px 2px; font-size: 9px; line-height: 1.6; color: var(--dim); }
.evidence-photo figcaption span { display: block; font-family: var(--mono); font-size: 7px; letter-spacing: .1em; color: var(--accent); margin-bottom: 2px; }
.experiment-controls { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin: 26px 0 22px; flex-wrap: wrap; border-bottom: 1px solid var(--line); padding-bottom: 12px; }
.experiment-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.experiment-card { border: 1px solid var(--line); background: rgba(7,10,17,.74); transition: border-color .25s, background .25s; }
.experiment-card:hover { border-color: rgba(var(--accent-rgb), .4); }
.experiment-card__head { width: 100%; background: transparent; border: 0; text-align: left; color: inherit; padding: 20px; display: grid; grid-template-columns: 62px 1fr 24px; gap: 14px; align-items: start; }
.experiment-card__year { font-family: var(--mono); font-size: 9px; color: var(--accent); padding-top: 3px; }
.experiment-card__title h3 { font-family: var(--serif); font-size: clamp(1.15rem, 1.7vw, 1.45rem); font-weight: 600; line-height: 1.35; }
.experiment-card__title .mono { display: block; font-size: 7px; color: var(--dim); margin-top: 4px; }
.experiment-card__plus { width: 22px; height: 22px; border: 1px solid var(--line); position: relative; transition: transform .3s, border-color .3s; }
.experiment-card__plus::before, .experiment-card__plus::after { content: ""; position: absolute; top: 50%; left: 50%; background: var(--accent); transform: translate(-50%, -50%); transition: opacity .3s; }
.experiment-card__plus::before { width: 8px; height: 1px; }
.experiment-card__plus::after { width: 1px; height: 8px; }
.experiment-card.is-open .experiment-card__plus { transform: rotate(45deg); border-color: var(--accent); }
.experiment-card__body { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .4s var(--ease); }
.experiment-card.is-open .experiment-card__body { grid-template-rows: 1fr; }
.experiment-card__body > div { overflow: hidden; }
.experiment-card__inner { padding: 0 20px 22px 96px; }
.experiment-card__row { display: grid; grid-template-columns: 58px 1fr; gap: 10px; padding: 8px 0; border-top: 1px solid var(--line); }
.experiment-card__row b { font-family: var(--mono); font-size: 7px; letter-spacing: .08em; color: var(--accent); padding-top: 2px; }
.experiment-card__row p { font-size: 10.5px; line-height: 1.75; color: var(--muted); }
.experiment-card__status { display: inline-flex; align-items: center; gap: 6px; margin-top: 8px; font-family: var(--mono); font-size: 8px; color: var(--green); }
.experiment-card__status::before { content: ""; width: 4px; height: 4px; border-radius: 50%; background: var(--green); }
.method-block { margin: 60px 0; }
.method-block__head { display: grid; grid-template-columns: 190px 1fr 1.1fr; gap: 24px; align-items: baseline; margin-bottom: 24px; }
.method-block__head .mono { color: var(--accent); }
.method-block__head h3 { font-family: var(--serif); font-size: clamp(1.45rem, 2.4vw, 2rem); font-weight: 600; }
.method-block__head p { font-size: 11px; line-height: 1.8; color: var(--muted); }
.method-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); counter-reset: step; }
.method-steps li { background: rgba(7,10,17,.94); padding: 20px; display: flex; gap: 14px; }
.method-steps li > span { font-family: var(--mono); font-size: 8px; color: var(--accent); }
.method-steps b { font-family: var(--serif); font-size: 16px; font-weight: 600; display: block; margin-bottom: 5px; }
.method-steps p { font-size: 10px; line-height: 1.7; color: var(--muted); }
.open-evidence { display: grid; grid-template-columns: 220px 1fr; gap: 30px; padding: 24px; border: 1px solid rgba(var(--accent-rgb), .25); background: rgba(7,10,17,.5); }
.open-evidence .mono { color: var(--accent); }
.open-evidence h3 { font-family: var(--serif); font-size: 21px; font-weight: 600; margin-top: 6px; }
.open-evidence__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 24px; }
.open-evidence__grid p { font-size: 10px; line-height: 1.7; color: var(--muted); }
.open-evidence__grid b { color: var(--ink); }

/* ---------- interpretations ---------- */
.interpretation-intro { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr); gap: clamp(26px, 5vw, 64px); align-items: center; margin-bottom: 36px; }
.measurement-chain { border: 1px solid var(--line); background: rgba(7,10,17,.6); padding: 22px; }
.measurement-chain .mono { color: var(--accent); }
.chain { display: flex; align-items: center; justify-content: space-between; gap: 4px; margin: 18px 0 14px; }
.chain > div { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 8px 4px; border: 1px solid var(--line); background: rgba(5,8,14,.7); text-align: center; }
.chain b { font-family: var(--serif); font-size: 11px; font-weight: 500; color: var(--ink); }
.chain span { font-family: var(--mono); font-size: 6.5px; color: var(--dim); }
.chain i { color: var(--accent); font-style: normal; font-size: 10px; }
.measurement-chain > p { font-size: 9.5px; line-height: 1.7; color: var(--dim); }
.interpretation-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 30px 0 40px; }
.interpretation-card { border: 1px solid var(--line); background: rgba(7,10,17,.9); padding: 22px; display: flex; flex-direction: column; gap: 8px; }
.interpretation-card:nth-child(3n) { grid-column: span 2; }
.interpretation-card__head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.interpretation-card__head h3 { font-family: var(--serif); font-size: 20px; font-weight: 600; }
.interpretation-card__head .mono { font-size: 7px; color: var(--dim); }
.interpretation-card__core { font-size: 11px; line-height: 1.8; color: var(--muted); }
.interpretation-card__meta { display: flex; gap: 12px; flex-wrap: wrap; font-family: var(--mono); font-size: 7px; color: var(--dim); border-top: 1px solid var(--line); padding-top: 8px; }
.interpretation-card__meta span b { color: var(--accent); font-weight: 400; }
.interpretation-card__quote { font-family: var(--serif); font-style: italic; font-size: 12px; color: var(--ink-2); border-left: 1px solid var(--accent); padding-left: 10px; }
.interpretation-table-wrap { margin: 40px 0; }
.interpretation-table-head { display: flex; align-items: baseline; gap: 20px; margin-bottom: 16px; }
.interpretation-table-head .mono { color: var(--accent); }
.interpretation-table-head h3 { font-family: var(--serif); font-size: clamp(1.3rem, 2.2vw, 1.7rem); font-weight: 600; }
.interpretation-table { border: 1px solid var(--line); overflow-x: auto; }
.it-row { display: grid; grid-template-columns: 1.2fr 1fr 1fr 1fr 1.2fr 1.4fr; min-width: 760px; border-bottom: 1px solid var(--line); }
.it-row > div { padding: 11px 13px; font-size: 10px; line-height: 1.6; color: var(--muted); border-right: 1px solid var(--line); }
.it-row > div:first-child { color: var(--ink); font-family: var(--serif); font-size: 13px; }
.it-row > div:last-child { border-right: 0; }
.it-row--head > div { font-family: var(--mono); font-size: 7px; letter-spacing: .1em; color: var(--accent); }
.interpretation-quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 44px 0; }
.interpretation-quotes blockquote { background: rgba(7,10,17,.85); padding: 24px; }
.interpretation-quotes p { font-family: var(--serif); font-style: italic; font-size: 20px; line-height: 1.45; }
.interpretation-quotes cite { display: block; margin-top: 10px; font-family: var(--mono); font-size: 7px; letter-spacing: .08em; color: var(--dim); font-style: normal; line-height: 1.6; }
.interpretation-essay { display: grid; grid-template-columns: 280px 1fr; gap: clamp(24px, 5vw, 60px); padding-top: 26px; border-top: 1px solid var(--line); }
.interpretation-essay .mono { color: var(--accent); }
.interpretation-essay h3 { font-family: var(--serif); font-size: clamp(1.4rem, 2.3vw, 1.9rem); font-weight: 600; margin-top: 8px; }

/* ---------- frontier ---------- */
.open-problems { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 54px; }
.problem-card { border: 1px solid var(--line); background: rgba(7,10,17,.9); padding: 22px; display: flex; flex-direction: column; gap: 9px; min-height: 190px; }
.problem-card--large { grid-column: span 2; background: radial-gradient(ellipse at 20% 20%, rgba(var(--accent-rgb), .09), transparent 60%), rgba(7,10,17,.75); }
.problem-card__no { font-family: var(--mono); font-size: 8px; color: var(--accent); }
.problem-card .mono { font-size: 7px; color: var(--dim); }
.problem-card h3 { font-family: var(--serif); font-size: clamp(1.2rem, 1.8vw, 1.55rem); font-weight: 600; }
.problem-card p { font-size: 10.5px; line-height: 1.8; color: var(--muted); }
.problem-card__eq { margin-top: auto; font-family: var(--mono); font-size: 11px; color: var(--accent); border-top: 1px solid var(--line); padding-top: 12px; }
.quantum-gravity-block { margin: 54px 0; }
.quantum-gravity-block__head { display: grid; grid-template-columns: 210px 1fr 1.1fr; gap: 24px; align-items: baseline; margin-bottom: 22px; }
.quantum-gravity-block__head .mono { color: var(--accent); }
.quantum-gravity-block__head h3 { font-family: var(--serif); font-size: clamp(1.45rem, 2.3vw, 1.9rem); font-weight: 600; }
.quantum-gravity-block__head p { font-size: 11px; line-height: 1.8; color: var(--muted); }
.qg-table { border: 1px solid var(--line); overflow-x: auto; }
.qg-row { display: grid; grid-template-columns: 1.1fr 1.9fr 1.5fr 1.5fr; min-width: 760px; border-bottom: 1px solid var(--line); }
.qg-row > div { padding: 13px; font-size: 10px; line-height: 1.7; color: var(--muted); border-right: 1px solid var(--line); }
.qg-row > div:last-child { border-right: 0; }
.qg-row > div:first-child { display: flex; flex-direction: column; gap: 3px; }
.qg-row b { font-family: var(--serif); font-size: 14px; font-weight: 600; color: var(--ink); }
.qg-row span { font-family: var(--mono); font-size: 6.5px; letter-spacing: .08em; color: var(--dim); }
.qg-row--head > div { font-family: var(--mono); font-size: 7px; letter-spacing: .12em; color: var(--accent); }
.information-block { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(24px, 5vw, 60px); align-items: center; padding: clamp(24px, 4vw, 40px); border: 1px solid rgba(var(--accent-rgb), .25); background: rgba(7,10,17,.55); margin: 50px 0; }
.information-block__copy .mono { color: var(--accent); }
.information-block__copy h3 { font-family: var(--serif); font-size: clamp(1.6rem, 2.6vw, 2.1rem); font-weight: 600; margin: 8px 0 14px; }
.information-block__copy p { font-size: 11.5px; line-height: 1.9; color: var(--muted); margin-bottom: 10px; }
.information-block__art svg { width: 100%; height: auto; }
.roadmap { margin: 60px 0; }
.roadmap__head { display: flex; align-items: baseline; gap: 20px; margin-bottom: 24px; }
.roadmap__head .mono { color: var(--accent); white-space: nowrap; }
.roadmap__head h3 { font-family: var(--serif); font-size: clamp(1.4rem, 2.3vw, 1.9rem); font-weight: 600; }
.roadmap-line { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.roadmap-item { background: rgba(7,10,17,.94); padding: 20px; position: relative; }
.roadmap-item::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: var(--accent); opacity: .45; }
.roadmap-item > span { font-family: var(--mono); font-size: 8px; color: var(--accent); }
.roadmap-item h4 { font-family: var(--serif); font-size: 16px; font-weight: 600; margin: 8px 0 6px; }
.roadmap-item p { font-size: 10px; line-height: 1.75; color: var(--muted); }
.frontier-note { display: grid; grid-template-columns: 170px 1fr; gap: 24px; border-top: 1px solid var(--line); padding-top: 20px; }
.frontier-note .mono { color: var(--accent); }
.frontier-note p { font-size: 11px; line-height: 1.8; color: var(--muted); }
.frontier-note b { color: var(--ink); }

/* ---------- archive ---------- */
.archive-stats { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-bottom: 50px; }
.archive-stats > div { background: rgba(7,10,17,.85); padding: 18px; display: flex; flex-direction: column; gap: 3px; }
.archive-stats b { font-family: var(--serif); font-size: 28px; line-height: 1; font-weight: 400; color: var(--accent); }
.archive-stats span { font-size: 9px; color: var(--dim); }
.archive-section { margin: 58px 0; scroll-margin-top: 90px; }
.archive-section__head { display: grid; grid-template-columns: 190px 1fr 1.1fr; gap: 24px; align-items: end; margin-bottom: 24px; }
.archive-section__head .mono { color: var(--accent); }
.archive-section__head h3 { font-family: var(--serif); font-size: clamp(1.3rem, 1.9vw, 1.65rem); font-weight: 600; text-wrap: balance; }
.archive-section__head p { font-size: 10.5px; line-height: 1.7; color: var(--muted); }
.glossary-search { position: relative; grid-column: 3; display: flex; align-items: center; gap: 8px; border-bottom: 1px solid var(--line-strong); padding: 8px 0; }
.glossary-search svg { width: 14px; height: 14px; color: var(--dim); }
.glossary-search input { width: 100%; background: none; border: 0; outline: 0; font-size: 12px; color: var(--ink); }
.glossary-search input::placeholder { color: var(--dim); }
.equation-wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.eq-card { background: rgba(7,10,17,.9); padding: 18px; display: flex; flex-direction: column; gap: 9px; cursor: pointer; text-align: left; color: inherit; border: 0; min-height: 124px; transition: background .25s; }
.eq-card:hover { background: rgba(var(--accent-rgb), .05); }
.eq-card__label { display: flex; justify-content: space-between; gap: 8px; font-family: var(--mono); font-size: 7px; letter-spacing: .08em; color: var(--dim); }
.eq-card__label span:last-child { color: var(--accent); opacity: 0; transition: opacity .2s; }
.eq-card:hover .eq-card__label span:last-child { opacity: 1; }
.eq-card__body { font-family: var(--serif); font-size: clamp(17px, 1.55vw, 21px); line-height: 1.5; color: var(--ink); word-break: break-word; }
.eq-card__text { font-size: 10px; line-height: 1.7; color: var(--muted); max-height: 0; overflow: hidden; opacity: 0; transition: max-height .35s, opacity .25s; }
.eq-card.is-open .eq-card__text { max-height: 180px; opacity: 1; }
.glossary-list { columns: 2; column-gap: 36px; border-top: 1px solid var(--line); padding-top: 10px; }
.glossary-item { break-inside: avoid; padding: 11px 0; border-bottom: 1px solid var(--line); }
.glossary-item dt { font-family: var(--serif); font-size: 14px; color: var(--ink); margin-bottom: 3px; }
.glossary-item dd { font-size: 10px; line-height: 1.7; color: var(--muted); }
.glossary-item.is-hidden { display: none; }
.glossary-empty { padding: 20px 0; font-size: 11px; color: var(--dim); }
.reading-list { border-top: 1px solid var(--line-strong); }
.reading-item { display: grid; grid-template-columns: 62px minmax(0, 1.1fr) minmax(0, 1fr); gap: 18px; padding: 16px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.reading-item__type { font-family: var(--mono); font-size: 7px; color: var(--accent); letter-spacing: .08em; }
.reading-item h4 { font-family: var(--serif); font-size: 15px; font-weight: 600; line-height: 1.4; }
.reading-item h4 span { display: block; font-family: var(--sans); font-size: 9px; color: var(--dim); font-weight: 400; margin-top: 2px; }
.reading-item p { font-size: 10px; line-height: 1.7; color: var(--muted); }
.credits-table { border-top: 1px solid var(--line-strong); }
.credit-row { display: grid; grid-template-columns: 1.2fr 1.4fr .8fr .8fr; gap: 14px; padding: 10px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.credit-row > div { font-size: 9.5px; color: var(--muted); }
.credit-row > div:first-child { font-family: var(--serif); font-size: 12px; color: var(--ink); }
.credit-row a { color: var(--accent); border-bottom: 1px solid rgba(var(--accent-rgb), .3); }
.credit-row--head > div { font-family: var(--mono); font-size: 7px; letter-spacing: .1em; color: var(--accent); }
.credits-note { margin-top: 14px; font-size: 9.5px; line-height: 1.7; color: var(--dim); }
.method-note { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 50px 0; }
.method-note__col { background: rgba(7,10,17,.84); padding: 26px; }
.method-note .mono { color: var(--accent); }
.method-note h3 { font-family: var(--serif); font-size: 21px; font-weight: 600; margin: 8px 0 10px; }
.method-note p { font-size: 10.5px; line-height: 1.8; color: var(--muted); }
.shortcut-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 14px; font-size: 9px; color: var(--dim); }
kbd { font-family: var(--mono); font-size: 8px; border: 1px solid var(--line); padding: 2px 5px; color: var(--muted); }
.final-cta { text-align: center; padding: clamp(50px, 8vw, 100px) 0 20px; border-top: 1px solid var(--line); }
.final-cta .mono { color: var(--accent); }
.final-cta h2 { font-family: var(--serif); font-size: clamp(2.4rem, 5vw, 4.5rem); line-height: 1.15; font-weight: 600; margin: 18px 0 16px; }
.final-cta h2 em { font-style: italic; font-weight: 400; color: var(--accent); }
.final-cta p { max-width: 54ch; margin: 0 auto; font-family: var(--serif); font-size: 13px; line-height: 1.9; color: var(--muted); }
.final-cta__actions { display: flex; justify-content: center; gap: 12px; margin-top: 28px; flex-wrap: wrap; }

/* ---------- footer ---------- */
.footer { position: relative; z-index: 2; border-top: 1px solid var(--line); background: rgba(4,6,10,.75); padding: 50px var(--pad) 24px; }
.footer__top { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 1.2fr 1.4fr; gap: 48px; padding-bottom: 36px; border-bottom: 1px solid var(--line); }
.footer__brand .mono { color: var(--accent); }
.footer__wordmark { font-family: var(--serif); font-size: clamp(2rem, 3.5vw, 3rem); line-height: 1.2; margin: 16px 0 12px; }
.footer__wordmark span { font-style: italic; color: var(--accent); font-size: .7em; }
.footer__brand p { font-family: var(--mono); font-size: 8px; line-height: 1.8; letter-spacing: .1em; color: var(--dim); }
.footer__nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.footer__nav > div { display: flex; flex-direction: column; gap: 5px; }
.footer__nav span { font-family: var(--mono); font-size: 7px; letter-spacing: .15em; color: var(--accent); margin-bottom: 6px; }
.footer__nav a { font-size: 11px; color: var(--muted); transition: color .2s; }
.footer__nav a:hover { color: var(--ink); }
.footer__bottom { max-width: var(--max); margin: 18px auto 0; display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; font-family: var(--mono); font-size: 7.5px; letter-spacing: .06em; color: var(--dim); }
.footer__bottom a { color: var(--accent); }

/* ---------- modals ---------- */
.modal { border: 1px solid var(--line-strong); background: #080c15; color: var(--ink); padding: 0; max-width: min(940px, 92vw); width: 100%; max-height: 88vh; overflow: auto; }
.modal::backdrop { background: rgba(3,5,9,.82); backdrop-filter: blur(8px); }
.modal__bar { position: sticky; top: 0; z-index: 3; display: flex; justify-content: space-between; align-items: center; padding: 13px 18px; background: rgba(8,12,21,.96); border-bottom: 1px solid var(--line); font-family: var(--mono); font-size: 8px; letter-spacing: .15em; color: var(--dim); backdrop-filter: blur(8px); }
.modal__close { background: none; border: 1px solid var(--line); color: var(--muted); width: 28px; height: 28px; font-size: 18px; line-height: 1; display: grid; place-items: center; transition: all .2s; }
.modal__close:hover { color: var(--ink); border-color: var(--accent); }
.person-modal__body { padding: clamp(20px, 3.4vw, 36px); }
.person-modal__grid { display: grid; grid-template-columns: minmax(220px, .72fr) minmax(0, 1.28fr); gap: clamp(22px, 4vw, 44px); }
.person-modal__photo { position: sticky; top: 64px; align-self: start; border: 1px solid var(--line); background: #0a0e17; }
.person-modal__photo img { width: 100%; aspect-ratio: 3/3.8; object-fit: cover; object-position: var(--pos, 50% 25%); filter: grayscale(.7) contrast(1.04); }
.person-modal__photo .credit { padding: 8px; font-family: var(--mono); font-size: 6.5px; line-height: 1.5; color: var(--dim); }
.person-modal__tag { display: inline-flex; gap: 8px; align-items: center; font-family: var(--mono); font-size: 7.5px; letter-spacing: .1em; color: var(--accent); }
.person-modal__tag i { width: 4px; height: 4px; border-radius: 50%; background: var(--accent); }
.person-modal h2 { font-family: var(--serif); font-size: clamp(2rem, 4vw, 3rem); line-height: 1.15; font-weight: 600; margin: 10px 0 4px; }
.person-modal__en { font-family: var(--mono); font-size: 8px; letter-spacing: .12em; color: var(--dim); }
.person-modal__years { font-family: var(--mono); font-size: 9px; color: var(--muted); margin-top: 6px; }
.person-modal__quote { margin: 18px 0; padding: 14px 18px; border-left: 1px solid var(--accent); background: rgba(var(--accent-rgb), .04); font-family: var(--serif); font-style: italic; font-size: 15px; line-height: 1.6; }
.person-modal__quote cite { display: block; margin-top: 6px; font-family: var(--mono); font-size: 7px; font-style: normal; color: var(--dim); }
.person-modal__bio { font-family: var(--serif); font-size: 12px; line-height: 1.95; color: var(--ink-2); }
.person-modal__section { margin-top: 20px; }
.person-modal__section h4 { font-family: var(--mono); font-size: 7.5px; letter-spacing: .14em; color: var(--accent); margin-bottom: 8px; }
.person-modal__list { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 12px; }
.person-modal__list li { font-size: 10px; line-height: 1.6; color: var(--muted); padding-left: 12px; position: relative; }
.person-modal__list li::before { content: "—"; position: absolute; left: 0; color: var(--accent); }
.person-modal__note { font-size: 10px; line-height: 1.8; color: var(--muted); border: 1px solid var(--line); padding: 12px; background: rgba(5,8,14,.5); }
.person-modal__links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.person-modal__links a { font-family: var(--mono); font-size: 7.5px; border: 1px solid var(--line); padding: 6px 9px; color: var(--muted); transition: all .2s; }
.person-modal__links a:hover { border-color: var(--accent); color: var(--accent); }
.search-modal { max-width: min(760px, 94vw); }
.search-modal__head { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.search-modal__head .mono { color: var(--accent); }
.search-modal__input { display: flex; align-items: center; gap: 12px; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.search-modal__input svg { width: 18px; height: 18px; color: var(--accent); flex-shrink: 0; }
.search-modal__input input { flex: 1; background: none; border: 0; outline: 0; font-size: 17px; font-family: var(--serif); color: var(--ink); }
.search-modal__input input::placeholder { color: var(--dim); }
.search-modal__input kbd { flex-shrink: 0; }
.search-modal__hint { padding: 10px 20px; display: flex; gap: 7px; flex-wrap: wrap; align-items: center; font-family: var(--mono); font-size: 8px; color: var(--dim); border-bottom: 1px solid var(--line); }
.search-modal__hint button { background: none; border: 1px solid var(--line); color: var(--muted); padding: 3px 7px; font-size: 9px; }
.search-modal__hint button:hover { border-color: var(--accent); color: var(--accent); }
.search-results { max-height: 52vh; overflow: auto; padding: 8px; }
.search-empty { padding: 20px; font-size: 11px; color: var(--dim); text-align: center; }
.search-result { display: block; width: 100%; text-align: left; background: none; border: 0; border-bottom: 1px solid rgba(236,231,220,.07); padding: 11px 12px; color: inherit; transition: background .2s; }
.search-result:hover, .search-result:focus-visible { background: rgba(var(--accent-rgb), .06); }
.search-result__type { font-family: var(--mono); font-size: 6.5px; letter-spacing: .1em; color: var(--accent); }
.search-result__title { font-family: var(--serif); font-size: 14px; margin-top: 2px; }
.search-result__desc { font-size: 9px; line-height: 1.5; color: var(--dim); margin-top: 2px; }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); z-index: 300; background: var(--ink); color: var(--bg); font-family: var(--mono); font-size: 9px; letter-spacing: .08em; padding: 10px 18px; opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s; }
.toast.is-show { opacity: 1; transform: translate(-50%, 0); }
img.is-missing { opacity: 0 !important; }
.person-card__photo.has-missing, .person-modal__photo.has-missing, .history-photo.has-missing, .evidence-photo.has-missing { background: radial-gradient(ellipse at 50% 38%, rgba(var(--accent-rgb), .14), rgba(5,8,14,.9) 68%); }
.person-card__photo.has-missing .person-card__fallback, .person-modal__photo.has-missing .person-card__fallback { opacity: 1; font-size: 64px; letter-spacing: 0; }
.history-photo.has-missing::before, .evidence-photo.has-missing::before { content: "IMAGE ARCHIVE / 暂缺"; display: grid; place-items: center; aspect-ratio: 16/10; font-family: var(--mono); font-size: 8px; letter-spacing: .16em; color: var(--dim); }
.person-modal__photo.has-missing::before { content: ""; display: block; aspect-ratio: 3/3.8; }
body.is-exploring #cosmos { cursor: grab; }
body.is-exploring #cosmos:active { cursor: grabbing; }
body.is-exploring .hero__scroll { opacity: 0; }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1280px) {
  .chapter-rail { display: none; }
  .section-head { grid-template-columns: 90px minmax(0, 1.15fr) minmax(240px, .85fr); gap: 26px; }
  .section-head__index span:first-child { font-size: 30px; }
  .hero__title .hero__line--cn { font-size: clamp(4.2rem, 10vw, 8rem); }
  .old-quantum { grid-template-columns: repeat(3, 1fr); }
  .old-card:nth-child(4), .old-card:nth-child(5) { min-height: 160px; }
  .concept-grid { grid-template-columns: repeat(3, 1fr); }
  .archive-stats { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1120px) {
  .nav { display: none; }
  .menu-btn { display: flex; }
  .topbar__actions { margin-left: auto; }
  .sound-label { display: none; }
  .hero__grid { grid-template-columns: minmax(0, 1.2fr) minmax(240px, .8fr); }
  .hero__stage { min-height: 300px; }
  .stage-crosshair { width: 130px; height: 130px; }
  .section-head { grid-template-columns: 82px 1fr; }
  .section-head__lede { grid-column: 2; max-width: 62ch; }
  .section-head__title { font-size: clamp(2.5rem, 4.2vw, 3.9rem); }
  .scale-block__head, .tests-block__head, .cosmology-block__head, .concept-section__head, .qft-block__head, .method-block__head, .quantum-gravity-block__head, .archive-section__head { grid-template-columns: 150px 1fr; }
  .scale-block__head p, .tests-block__head p, .cosmology-block__head p, .concept-section__head p, .qft-block__head p, .method-block__head p, .quantum-gravity-block__head p, .archive-section__head p { grid-column: 2; }
  .glossary-search { grid-column: 2; }
  .consequence-grid { grid-template-columns: 1fr 1fr; }
  .qft-grid { grid-template-columns: 1fr 1fr; }
  .qft-card:last-child { grid-column: span 2; }
  .tech-grid { grid-template-columns: 1fr 1fr; }
  .people-grid { grid-template-columns: repeat(3, 1fr); }
  .method-steps { grid-template-columns: 1fr 1fr; }
  .roadmap-line { grid-template-columns: 1fr 1fr; }
  .equation-wall { grid-template-columns: 1fr 1fr; }
  .archive-section__head { align-items: end; }
}

@media (max-width: 980px) {
  .hero { min-height: auto; padding-top: 130px; padding-bottom: 90px; }
  .hero__grid { grid-template-columns: 1fr; gap: 20px; }
  .hero__stage { position: absolute; right: -10%; top: 8%; width: 55%; height: 60%; opacity: .55; min-height: 0; z-index: -1; }
  .stage-note--top, .stage-note--right { display: none; }
  .stage-note--bottom { left: auto; right: 10%; bottom: 6%; }
  .hero__stats { margin-top: 38px; }
  .hero__hud { grid-template-columns: 1fr 1fr; margin-top: 40px; }
  .hud-cell { border-bottom: 1px solid var(--line); }
  .hud-cell:nth-child(2n) { border-right: 0; }
  .hud-cell--wide { grid-column: span 2; border-bottom: 0; }
  .hero__scroll { display: none; }
  .overview-intro, .quantum-intro, .rel-intro, .rel-intro--reverse, .history-feature, .people-map, .interpretation-intro, .information-block { grid-template-columns: 1fr; }
  .rel-intro--reverse .prose { order: 0; }
  .quantum-quote, .pullquote { border-left: 0; border-top: 1px solid var(--line); padding: 18px 0 0; }
  .overview-aside { border-left: 0; border-top: 1px solid var(--line); padding: 20px 0 0; }
  .lab__grid, .lab__grid--wide { grid-template-columns: 1fr; }
  .lab__visual { border-right: 0; border-bottom: 1px solid var(--line); }
  .lab-canvas-wrap--3d { min-height: 400px; }
  .lab__side { padding: 24px; }
  .postulates { grid-template-columns: 1fr; }
  .train-thought, .emc2-block, .wavefunction-block, .entanglement-block, .blackhole-block, .interpretation-essay { grid-template-columns: 1fr; }
  .equivalence-grid { grid-template-columns: 1fr; }
  .cosmology-grid { grid-template-columns: 1fr; }
  .history-essay { grid-template-columns: 1fr; }
  .archive-gap__grid { grid-template-columns: 1fr; }
  .evidence-gallery { grid-template-columns: 1fr; }
  .evidence-photo--wide { grid-row: auto; }
  .evidence-photo--wide img { min-height: 0; aspect-ratio: 16/10; }
  .experiment-grid { grid-template-columns: 1fr; }
  .interpretation-grid { grid-template-columns: 1fr; }
  .interpretation-card:nth-child(3n) { grid-column: auto; }
  .interpretation-quotes { grid-template-columns: 1fr; }
  .open-evidence { grid-template-columns: 1fr; }
  .open-problems { grid-template-columns: 1fr 1fr; }
  .problem-card--large { grid-column: span 2; }
  .information-block__art { max-width: 520px; }
  .archive-stats { grid-template-columns: repeat(3, 1fr); }
  .people-map__nodes { min-height: 300px; }
  .nobel-strip { grid-template-columns: 1fr; gap: 10px; }
  .footer__top { grid-template-columns: 1fr; gap: 30px; }
  .person-modal__grid { grid-template-columns: 1fr; }
  .person-modal__photo { position: static; max-width: 340px; }
}

@media (max-width: 760px) {
  .hero::after { content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none; background: linear-gradient(to bottom, rgba(5,7,13,.18), rgba(5,7,13,.5) 40%, rgba(5,7,13,.88) 72%, #05070d 100%); }
  .hero__grid, .hero__hud, .hero__scroll { position: relative; z-index: 1; }
  .hero__stage { display: none; }
  .hero__line--cn { font-size: clamp(3.3rem, 16vw, 4.5rem); }
  .hero__lede { text-shadow: 0 1px 18px rgba(5,7,13,.9); }
  .hero__copy { position: relative; }
  .hero__copy::before { content: ""; position: absolute; inset: -24px -28px -24px -22px; z-index: -1; pointer-events: none; background: radial-gradient(ellipse at 22% 48%, rgba(5,7,13,.94) 0%, rgba(5,7,13,.66) 48%, rgba(5,7,13,0) 76%); }
  .topbar__actions { gap: 0; }
  .sound-btn { display: none; }
  .hero__stats dd { font-size: 1.35rem; }

  :root { --pad: 20px; }
  body { font-size: 15px; }
  .topbar { height: 62px; padding: 0 18px; gap: 12px; }
  .brand__copy strong { font-size: 13px; }
  .brand__copy small { font-size: 6px; }
  .brand__mark { width: 30px; height: 30px; }
  .icon-btn__hint, .archive-link { display: none; }
  .topbar__actions { gap: 5px; }
  .section { padding: 72px 0; }
  .section-head { grid-template-columns: 1fr; gap: 14px; margin-bottom: 42px; padding-top: 16px; }
  .section-head__index { flex-direction: row; align-items: center; gap: 10px; }
  .section-head__index span:first-child { font-size: 24px; }
  .section-head__index i { width: 24px; }
  .section-head__title { font-size: clamp(2.1rem, 8.4vw, 3.1rem); }
  .section-head__lede { grid-column: 1; font-size: 13px; line-height: 1.85; }
  .hero { padding: 106px 20px 74px; }
  .hero__title { margin: 26px 0 24px; }
  .hero__line--cn { font-size: clamp(3.8rem, 17vw, 5.8rem); }
  .hero__line--en { font-size: 10px; letter-spacing: .28em; line-height: 1.7; }
  .hero__lede { font-size: 13px; line-height: 1.9; }
  .hero__stats { grid-template-columns: 1fr 1fr; }
  .hero__stats > div:nth-child(2n) { border-right: 0; }
  .hero__stats > div { padding: 11px 10px 0 0; }
  .hero__stats dt { font-size: 8px; }
  .hero__hud { grid-template-columns: 1fr 1fr; }
  .hud-cell { padding: 10px; }
  .hud-cell--wide { padding: 12px 10px; }
  .hud-cell b { font-size: 9.5px; }
  .hero__actions { gap: 8px; }
  .btn { padding: 12px 16px; font-size: 9px; }
  .prose p { font-size: 14px; line-height: 1.95; }
  .prose .dropcap::first-letter { font-size: 3.4em; }
  .scale-block, .compare-block, .archive-gap, .method-note__col { padding: 18px; }
  .scale-block__head, .tests-block__head, .cosmology-block__head, .concept-section__head, .qft-block__head, .method-block__head, .quantum-gravity-block__head, .archive-section__head { grid-template-columns: 1fr; gap: 8px; }
  .scale-block__head p, .tests-block__head p, .cosmology-block__head p, .concept-section__head p, .qft-block__head p, .method-block__head p, .quantum-gravity-block__head p, .archive-section__head p { grid-column: 1; }
  .scale-ruler { height: 190px; overflow: hidden; }
  .scale-tick span { font-size: 7px; }
  .scale-tick b { font-size: 8px; }
  .scale-band { font-size: 6px; }
  .compare-row { grid-template-columns: 80px 1fr 1fr; }
  .compare-row > div { padding: 9px 8px; font-size: 9.5px; }
  .compare-row > div:first-child { font-size: 11px; }
  .compare-head { flex-direction: column; gap: 6px; }
  .consequence-grid, .concept-grid, .qft-grid, .tech-grid, .method-steps, .old-quantum, .open-problems, .people-grid, .archive-stats, .equation-wall, .roadmap-line { grid-template-columns: 1fr 1fr; }
  .concept-grid { grid-template-columns: 1fr; }
  .qft-card:last-child, .problem-card--large { grid-column: span 2; }
  .old-card:nth-child(5) { grid-column: span 2; }
  .consequence { min-height: 170px; padding: 16px; }
  .emc2-block, .wavefunction-block, .entanglement-block, .blackhole-block, .information-block, .history-feature { padding: 18px; }
  .equation { padding: 18px; }
  .equation__meta { flex-direction: column; gap: 4px; }
  .equation__body { padding: 24px 0 18px; }
  .equation__foot { grid-template-columns: 1fr; }
  .equation__chips { text-align: left; }
  .equation__legend { grid-template-columns: 1fr 1fr; }
  .m--lg { font-size: 21px; }
  .m--mega { font-size: clamp(3.4rem, 17vw, 5rem); }
  .train-thought { padding: 18px; }
  .train-thought__art { order: -1; }
  .formula-strip { grid-template-columns: 1fr 1fr; }
  .postulate { padding: 18px; }
  .lab__head { flex-direction: column; gap: 8px; padding: 16px 18px; }
  .lab__side { padding: 18px; }
  .lab-canvas-wrap--tall, .lab-canvas-wrap--square, .lab-canvas-wrap--slit { min-height: 340px; }
  .lab-canvas-wrap--3d { min-height: 330px; }
  .lab__legend { gap: 10px; font-size: 6.5px; left: 12px; right: 12px; bottom: 10px; }
  .lab__hint { display: none; }
  .readout b { font-size: 14px; }
  .history-controls { align-items: flex-start; flex-direction: column; gap: 10px; }
  .filters button { padding: 6px 8px; font-size: 9.5px; }
  .timeline::before { left: 58px; }
  .timeline-item { grid-template-columns: 44px 28px 1fr; padding: 14px 0; }
  .timeline-item__year { font-size: 9px; }
  .timeline-item__body { padding-left: 8px; }
  .timeline-item__top h4 { font-size: 14px; }
  .timeline-item p { font-size: 10px; line-height: 1.7; }
  .timeline-item__note { font-size: 8.5px; }
  .people-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .person-card__body { padding: 10px; }
  .person-card__summary { display: none; }
  .people-map__nodes { min-height: 260px; }
  .people-map__nodes > div { padding: 4px 5px; }
  .people-map__nodes b { font-size: 9px; }
  .people-map__nodes span { display: none; }
  .evidence-gallery { gap: 8px; }
  .experiment-card__head { grid-template-columns: 44px 1fr 22px; padding: 15px; gap: 10px; }
  .experiment-card__inner { padding: 0 15px 16px 69px; }
  .experiment-card__row { grid-template-columns: 48px 1fr; }
  .interpretation-essay { grid-template-columns: 1fr; }
  .chain { flex-wrap: wrap; }
  .chain > div { min-width: 30%; }
  .chain i { display: none; }
  .archive-stats { grid-template-columns: 1fr 1fr 1fr; }
  .archive-stats b { font-size: 22px; }
  .glossary-list { columns: 1; }
  .reading-item { grid-template-columns: 46px 1fr; gap: 10px; }
  .reading-item p { grid-column: 2; }
  .credit-row { grid-template-columns: 1fr 1fr; gap: 5px 12px; }
  .credit-row--head { display: none; }
  .method-note { grid-template-columns: 1fr; }
  .footer { padding: 36px 20px 20px; }
  .footer__nav { grid-template-columns: 1fr 1fr 1fr; }
  .footer__bottom { flex-direction: column; gap: 6px; }
  .modal { max-width: 96vw; max-height: 92vh; }
  .person-modal__list { grid-template-columns: 1fr; }
  .search-modal__input { padding: 12px 14px; }
  .search-modal__input input { font-size: 15px; }
  .search-modal__hint { padding: 8px 14px; }
  .toast { width: max-content; max-width: 90vw; text-align: center; }
  .topbar.is-scrolled { height: 54px; }
}

@media (max-width: 480px) {
  .hero__line--cn { font-size: clamp(3.3rem, 18vw, 4.6rem); }
  .hero__stats { grid-template-columns: 1fr 1fr; }
  .hero__hud { grid-template-columns: 1fr 1fr; }
  .hud-cell { border-right: 1px solid var(--line); }
  .hud-cell:nth-child(2n) { border-right: 0; }
  .hud-cell--wide { grid-column: span 2; }
  .concept-grid, .consequence-grid, .qft-grid, .tech-grid, .method-steps, .old-quantum, .open-problems, .people-grid, .archive-stats, .equation-wall, .roadmap-line { grid-template-columns: 1fr; }
  .qft-card:last-child, .problem-card--large, .old-card:nth-child(5) { grid-column: auto; }
  .people-grid { grid-template-columns: 1fr 1fr; }
  .archive-stats { grid-template-columns: 1fr 1fr; }
  .section-head__title { font-size: clamp(2.05rem, 8.4vw, 2.8rem); }
  .lab-canvas-wrap--tall, .lab-canvas-wrap--square, .lab-canvas-wrap--slit, .lab-canvas-wrap--3d { min-height: 290px; }
  .footer__nav { grid-template-columns: 1fr 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
  .grain { display: none; }
}

/* touch devices: show summary permanently */
@media (hover: none) {
  .person-card__summary { max-height: 60px; opacity: 1; margin-top: 6px; }
  .concept-card p { max-height: 140px; opacity: 1; }
}