/* ============================================================
   SPECTRA · 视觉盛宴
   A hand-built, dependency-free exhibition.
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root{
  --bg:#05060a;
  --bg-2:#080a11;
  --ink:#f5f3ef;
  --ink-dim:rgba(245,243,239,.62);
  --ink-faint:rgba(245,243,239,.36);
  --line:rgba(245,243,239,.14);
  --line-soft:rgba(245,243,239,.07);
  --accent:#7b5cff;
  --accent-glow:rgba(123,92,255,.35);
  --gold:#ffc36b;
  --cyan:#38e8ff;
  --rose:#ff3d8b;

  --sans:"Inter","Segoe UI","Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei Light","Microsoft YaHei","Noto Sans SC",sans-serif;
  --serif:"Cormorant Garamond","Bodoni 72","Didot","Georgia","Times New Roman",serif;

  --ease:cubic-bezier(.2,.7,.15,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --gutter:clamp(20px,5vw,84px);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.6;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}
::selection{background:var(--accent);color:#08090e;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;}
canvas{display:block;max-width:100%;}
h1,h2,h3,p,dl,dd{margin:0;}
:focus-visible{outline:1px solid var(--accent);outline-offset:4px;}

body::-webkit-scrollbar{width:8px;}
body::-webkit-scrollbar-track{background:#05060a;}
body::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:8px;}
body::-webkit-scrollbar-thumb:hover{background:var(--accent);}

.wrap{width:min(1320px,calc(100% - var(--gutter) * 2));margin-inline:auto;}

/* ---------- 2. Chrome (loader / cursor / grain / progress) ---------- */

/* Loader */
.loader{
  position:fixed;inset:0;z-index:300;
  display:flex;flex-direction:column;justify-content:space-between;
  padding:clamp(20px,4vw,44px);
  background:#04050a;
  clip-path:inset(0 0 0 0);
  transition:clip-path 1.1s var(--ease-out);
}
body.loaded .loader{clip-path:inset(0 0 100% 0);}
.loader.is-gone{visibility:hidden;pointer-events:none;}
.loader__top{
  display:flex;justify-content:space-between;
  font-size:10px;letter-spacing:.32em;text-transform:uppercase;
  color:var(--ink-faint);
}
.loader__center{
  position:absolute;inset:0;display:grid;place-content:center;
  text-align:center;gap:16px;pointer-events:none;
}
.loader__mark{
  font-family:var(--serif);font-style:italic;font-weight:400;
  font-size:clamp(64px,11vw,150px);line-height:.8;
  background:linear-gradient(160deg,#fff,#b9aaff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:loaderMark 2.4s var(--ease-out) both;
}
.loader__word{font-size:10px;letter-spacing:.62em;text-indent:.62em;color:var(--ink-faint);text-transform:uppercase;}
.loader__bottom{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;}
.loader__bar{flex:1;max-width:520px;height:1px;background:var(--line);margin-bottom:14px;}
.loader__bar i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--cyan));transform:scaleX(0);transform-origin:left;box-shadow:0 0 12px var(--accent);}
.loader__count{font-family:var(--serif);font-size:clamp(38px,7vw,84px);line-height:.85;font-variant-numeric:tabular-nums;letter-spacing:.02em;}
.loader__count em{font-size:.32em;font-style:normal;letter-spacing:.1em;color:var(--ink-faint);margin-left:.15em;}
@keyframes loaderMark{
  from{opacity:0;transform:translateY(18px);filter:blur(12px);}
  to{opacity:1;transform:none;filter:blur(0);}
}
.js body:not(.loaded){overflow:hidden;height:100vh;}

/* Custom cursor */
.cursor__dot,.cursor__ring{
  position:fixed;top:0;left:0;z-index:250;pointer-events:none;
  opacity:0;border-radius:50%;
  will-change:transform;
}
.cursor__dot{width:6px;height:6px;background:#fff;mix-blend-mode:difference;}
.cursor__ring{width:36px;height:36px;border:1px solid rgba(255,255,255,.5);}
.cursor__dot.on,.cursor__ring.on{opacity:1;}
.cursor__ring{transition:width .35s var(--ease-out),height .35s var(--ease-out),border-color .35s,background-color .35s,opacity .3s;}
.cursor__ring.is-hover{width:64px;height:64px;border-color:rgba(255,255,255,.85);background:rgba(255,255,255,.06);}
@media (pointer:coarse){.cursor__dot,.cursor__ring{display:none;}}
html.has-cursor,html.has-cursor a,html.has-cursor button,html.has-cursor .swatch{cursor:none;}

/* Grain */
.grain{
  position:fixed;inset:-12%;z-index:200;pointer-events:none;opacity:.05;
  mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size:160px 160px;
}

/* Progress */
.progress{position:fixed;top:0;left:0;right:0;height:2px;z-index:90;pointer-events:none;}
.progress i{
  display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--cyan));
  transform:scaleX(0);transform-origin:left;box-shadow:0 0 14px var(--accent);
  transition:background .6s;
}

/* Spotlight */
.spotlight{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.9;
  background:radial-gradient(560px circle at var(--sx,50%) var(--sy,38%), var(--accent-glow), transparent 70%);
  opacity:.16;
}
@media (pointer:coarse){.spotlight{display:none;}}

/* Color wash */
.color-wash{
  position:fixed;inset:0;z-index:0;pointer-events:none;opacity:0;
  background:radial-gradient(75% 65% at 50% 48%, var(--wash,#7b5cff) 0%, transparent 70%);
  mix-blend-mode:screen;
  transition:opacity .9s var(--ease);
}
.color-wash.is-on{opacity:.15;}

/* ---------- 3. Nav & rail ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:80;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px var(--gutter);
  border-bottom:1px solid transparent;
  transition:background .5s,backdrop-filter .5s,border-color .5s,padding .5s;
}
.nav.is-scrolled{
  padding-top:13px;padding-bottom:13px;
  background:rgba(5,6,10,.55);
  -webkit-backdrop-filter:blur(18px) saturate(1.2);
  backdrop-filter:blur(18px) saturate(1.2);
  border-bottom-color:var(--line-soft);
}
.nav__logo{display:flex;align-items:center;gap:13px;}
.nav__mark{
  display:grid;place-items:center;width:28px;height:28px;
  border:1px solid var(--line);border-radius:50%;
  transition:transform .8s var(--ease-out),border-color .4s;
}
.nav__mark i{
  width:8px;height:8px;background:var(--accent);transform:rotate(45deg);
  box-shadow:0 0 14px var(--accent);transition:background .6s,box-shadow .6s;
}
.nav__logo:hover .nav__mark{transform:rotate(180deg);border-color:var(--accent);}
.nav__name{display:flex;flex-direction:column;font-size:12px;letter-spacing:.26em;line-height:1.2;}
.nav__name em{font-style:normal;font-size:8px;letter-spacing:.22em;color:var(--ink-faint);margin-top:4px;}
.nav__links{display:flex;gap:clamp(16px,2.4vw,40px);}
.nav__links a{position:relative;font-size:12px;letter-spacing:.18em;color:var(--ink-dim);padding:6px 0;transition:color .35s;}
.nav__links a i{font-style:normal;font-family:var(--serif);font-size:9px;letter-spacing:.06em;color:var(--ink-faint);margin-right:5px;vertical-align:super;}
.nav__links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:currentColor;
  transform:scaleX(0);transform-origin:right;transition:transform .55s var(--ease-out);
}
.nav__links a:hover{color:var(--ink);}
.nav__links a:hover::after{transform:scaleX(1);transform-origin:left;}

.tour-btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 15px;border:1px solid var(--line);border-radius:999px;
  background:transparent;color:var(--ink-dim);cursor:pointer;
  font-size:9px;letter-spacing:.26em;text-transform:uppercase;
  transition:border-color .4s,color .4s,background .4s;
}
.tour-btn:hover{border-color:var(--accent);color:var(--ink);}
.tour-btn__icon{
  width:0;height:0;border-left:6px solid currentColor;
  border-top:4px solid transparent;border-bottom:4px solid transparent;
  transition:border .3s,transform .3s;
}
.tour-btn.is-on{color:var(--ink);border-color:var(--accent);background:rgba(255,255,255,.04);}
.tour-btn.is-on .tour-btn__icon{
  width:7px;height:7px;border:0;border-radius:1px;background:currentColor;
}

/* guided-tour HUD */
.tour-hud{
  position:fixed;left:50%;bottom:26px;z-index:70;
  transform:translate(-50%,18px);
  display:flex;align-items:center;gap:14px;
  padding:10px 16px;border:1px solid rgba(245,243,239,.14);border-radius:999px;
  background:rgba(6,7,12,.72);backdrop-filter:blur(14px);
  font-size:9px;letter-spacing:.26em;text-transform:uppercase;color:var(--ink-dim);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .5s var(--ease),transform .5s var(--ease),visibility .5s;
}
.tour-hud.is-live{opacity:1;visibility:visible;transform:translate(-50%,0);}
.tour-hud__idx{color:var(--accent);letter-spacing:.18em;}
.tour-hud__name{color:var(--ink);font-family:var(--cn);font-size:12px;letter-spacing:.3em;text-indent:.3em;}
.tour-hud__line{
  position:relative;display:block;width:clamp(90px,14vw,200px);height:1px;
  background:rgba(245,243,239,.16);overflow:hidden;
}
.tour-hud__line i{
  position:absolute;inset:0;background:var(--accent);
  transform:scaleX(0);transform-origin:left;
}
.tour-hud__hint{opacity:.5;letter-spacing:.2em;}

.rail{
  position:fixed;right:clamp(12px,2vw,26px);top:50%;transform:translateY(-50%);
  z-index:60;display:flex;flex-direction:column;align-items:flex-end;gap:18px;
}
.rail a{
  display:flex;align-items:center;gap:10px;
  font-size:9px;letter-spacing:.2em;color:var(--ink-faint);
  opacity:.5;transition:opacity .4s,color .4s;
}
.rail a::after{
  content:"";width:6px;height:6px;border:1px solid currentColor;border-radius:50%;
  transition:background .4s,border-color .4s,box-shadow .4s,transform .4s;
}
.rail a span{opacity:0;transform:translateX(6px);transition:opacity .4s,transform .4s;color:var(--ink-dim);}
.rail a:hover,.rail a.is-active{opacity:1;}
.rail a:hover span{opacity:1;transform:none;}
.rail a.is-active{color:var(--ink);}
.rail a.is-active::after{
  background:var(--accent);border-color:var(--accent);
  box-shadow:0 0 12px var(--accent);transform:scale(1.2);
}
.rail a.is-active span{opacity:1;transform:none;color:var(--accent);}
@media (max-width:1100px){.rail{display:none;}}

/* ---------- 4. Hero ---------- */
.hero{
  position:relative;isolation:isolate;
  min-height:100svh;min-height:100vh;
  display:grid;place-items:center;
  padding:120px 0 130px;
  overflow:hidden;
}
.hero__canvas{position:absolute;inset:0;width:100%;height:100%;z-index:-2;background:#05060a;}
.hero__veil{
  position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(72% 56% at 50% 44%, rgba(5,6,10,0) 0%, rgba(5,6,10,.28) 58%, rgba(5,6,10,.78) 100%),
    linear-gradient(180deg, rgba(5,6,10,.72) 0%, rgba(5,6,10,0) 26%, rgba(5,6,10,0) 64%, rgba(5,6,10,.96) 100%);
}
.hero__side{
  position:absolute;left:clamp(14px,2.4vw,34px);top:50%;
  transform:translateY(-50%) rotate(180deg);
  writing-mode:vertical-rl;
  font-size:9px;letter-spacing:.42em;text-transform:uppercase;color:var(--ink-faint);
  z-index:2;
}
@media (max-width:900px){.hero__side{display:none;}}

.hero__inner{position:relative;z-index:2;text-align:center;padding:0 var(--gutter);}
.hero__eyebrow{
  display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:12px;
  font-size:9px;letter-spacing:.32em;text-transform:uppercase;color:var(--ink-faint);
  margin-bottom:clamp(22px,3.4vw,40px);
}
.hero__eyebrow .dot{width:3px;height:3px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent);}

.hero__title{
  display:flex;flex-direction:column;align-items:center;
  font-family:var(--cn);font-weight:200;
  font-size:clamp(68px,15vw,218px);
  line-height:.94;letter-spacing:.045em;
  text-indent:.045em;
}
.hero__line{display:flex;overflow:hidden;padding-bottom:.05em;}
.hero__line--2{transform:translateX(clamp(10px,2.4vw,40px));}
.hero__char{
  display:inline-block;
  transform:translateY(112%) rotate(3deg);opacity:0;
  background:linear-gradient(178deg,#ffffff 0%,#efeaff 46%,#b6a5ff 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  transition:transform 1.5s var(--ease-out),opacity 1s ease;
  transition-delay:calc(.18s + var(--i) * .085s);
  will-change:transform;
  padding:0 .012em;
}
body.loaded .hero__char{transform:translateY(0) rotate(0);opacity:1;}

.hero__sub{
  margin-top:clamp(24px,3.4vw,40px);
  font-size:clamp(13px,1.15vw,16px);letter-spacing:.2em;color:var(--ink-dim);
}
.hero__sub .en{
  display:block;margin-top:12px;
  font-family:var(--serif);font-style:italic;
  font-size:1.02em;letter-spacing:.04em;color:var(--ink-faint);
}

.hero__cite{
  margin-top:clamp(16px,2.2vw,26px);
  font-size:clamp(10px,.78vw,11.5px);font-weight:300;
  letter-spacing:.2em;color:rgba(236,240,255,.42);
  display:flex;align-items:center;gap:12px;
}
.hero__cite::before{
  content:"";display:block;flex:0 0 auto;
  width:clamp(18px,2vw,30px);height:1px;
  background:linear-gradient(90deg,transparent,rgba(236,240,255,.34));
}

.hero__foot{
  position:absolute;left:var(--gutter);right:var(--gutter);
  bottom:clamp(20px,3.6vh,42px);z-index:2;
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
}
.hero__facts{
  display:flex;gap:clamp(18px,3.4vw,58px);
  border-top:1px solid var(--line-soft);padding-top:16px;
}
.hero__fact dt{font-size:8px;letter-spacing:.28em;color:var(--ink-faint);text-transform:uppercase;}
.hero__fact dd{margin-top:7px;font-size:10px;letter-spacing:.14em;color:var(--ink-dim);white-space:nowrap;}
.hero__cue{
  display:flex;flex-direction:column;align-items:center;gap:12px;
  font-size:8px;letter-spacing:.36em;text-transform:uppercase;color:var(--ink-faint);
  transition:color .4s;
}
.hero__cue:hover{color:var(--ink);}
.hero__cue i{display:block;width:1px;height:46px;background:rgba(255,255,255,.14);position:relative;overflow:hidden;}
.hero__cue i::after{
  content:"";position:absolute;left:0;top:-50%;width:1px;height:50%;
  background:#fff;animation:cue 2.6s var(--ease) infinite;
}
@keyframes cue{0%{transform:translateY(0);}70%,100%{transform:translateY(300%);}}
.hero__clock{
  display:flex;align-items:baseline;gap:8px;
  font-family:var(--serif);font-size:12px;letter-spacing:.16em;color:var(--ink-dim);
  font-variant-numeric:tabular-nums;
}
.hero__clock em{font-style:normal;font-size:8px;letter-spacing:.2em;color:var(--ink-faint);}

/* ---------- 4.5 Hero star chart ---------- */
.hero__starmap{
  position:absolute;inset:0;width:100%;height:100%;
  z-index:0;pointer-events:none;
  mix-blend-mode:screen;opacity:.96;
}
.hero__coords{
  display:flex;justify-content:center;flex-wrap:wrap;gap:10px 22px;
  margin:16px 0 0;
  font-size:9px;letter-spacing:.24em;text-transform:uppercase;
  color:rgba(236,240,255,.42);
}
.hero__coords span{position:relative;}
.hero__coords span + span::before{
  content:"";position:absolute;left:-12px;top:50%;
  width:2px;height:2px;border-radius:50%;
  background:rgba(236,240,255,.26);transform:translateY(-50%);
}
.hero__title{text-shadow:0 0 90px rgba(123,92,255,.24);}

/* ---------- 5. Manifesto & marquee ---------- */
.manifesto{position:relative;padding:clamp(110px,19vh,220px) 0;}
.manifesto__inner{max-width:1020px;text-align:center;}
.kicker{
  display:inline-flex;align-items:center;gap:14px;
  font-size:9px;letter-spacing:.36em;text-transform:uppercase;color:var(--ink-faint);
}
.kicker::before{content:"";width:36px;height:1px;background:var(--accent);opacity:.85;}
.manifesto__lines{
  margin-top:clamp(28px,4vw,44px);
  font-family:var(--cn);font-weight:200;
  font-size:clamp(27px,4.1vw,56px);line-height:1.55;letter-spacing:.05em;
}
.manifesto__lines em{font-style:normal;color:var(--accent);text-shadow:0 0 40px var(--accent-glow);}
.manifesto__en{
  margin-top:clamp(28px,4vw,48px);
  font-family:var(--serif);font-style:italic;
  font-size:clamp(14px,1.4vw,19px);letter-spacing:.03em;color:var(--ink-faint);
}

.marquee{
  padding:24px 0;border-block:1px solid var(--line-soft);
  overflow:hidden;white-space:nowrap;
}
.marquee__track{display:inline-flex;align-items:center;animation:marquee 52s linear infinite;will-change:transform;}
.marquee span{
  font-family:var(--serif);font-size:clamp(20px,2.5vw,32px);letter-spacing:.16em;
  color:var(--ink-dim);padding:0 26px;
}
.marquee span b{
  font-family:var(--sans);font-weight:400;font-size:9px;letter-spacing:.3em;
  color:var(--accent);vertical-align:middle;
}
@keyframes marquee{to{transform:translateX(-50%);}}

/* ---------- 6. Chapters ---------- */
.chapter{position:relative;padding:clamp(96px,14vh,168px) 0;}
.chapter__head{display:flex;align-items:center;gap:clamp(14px,2vw,26px);margin-bottom:clamp(34px,5vw,64px);}
.chapter__num{font-family:var(--serif);font-size:13px;letter-spacing:.2em;color:var(--accent);}
.chapter__rule{flex:1;height:1px;background:var(--line-soft);}
.chapter__kicker{font-size:9px;letter-spacing:.32em;text-transform:uppercase;color:var(--ink-faint);}
.chapter__title{
  font-family:var(--cn);font-weight:200;
  font-size:clamp(33px,5.3vw,76px);line-height:1.16;letter-spacing:.015em;
  margin-bottom:clamp(20px,3vw,34px);
}
.chapter__text{
  max-width:46ch;font-size:clamp(14px,1.06vw,16.5px);line-height:2.05;
  color:var(--ink-dim);letter-spacing:.02em;
}
.chapter__note{
  margin-top:clamp(26px,3.4vw,42px);
  font-size:9px;letter-spacing:.26em;text-transform:uppercase;color:var(--ink-faint);
}
.chapter__grid{display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(30px,6vw,90px);align-items:center;}
@media (max-width:900px){
  .chapter__grid{grid-template-columns:1fr;}
}

/* Orb */
.orb{position:relative;width:100%;max-width:520px;margin-inline:auto;aspect-ratio:1;filter:saturate(1.12);}
.orb__halo{
  position:absolute;inset:-16%;border-radius:50%;
  background:radial-gradient(circle at 50% 50%, var(--accent-glow), transparent 64%);
  filter:blur(34px);animation:breathe 9s ease-in-out infinite;
}
.orb__core{
  position:absolute;inset:15%;border-radius:50%;
  background:conic-gradient(from 0deg,#7b5cff,#38e8ff,#ff3d8b,#ffc36b,#7b5cff);
  filter:blur(26px) saturate(1.5);opacity:.9;
  animation:spin 24s linear infinite;
}
.orb__ring{
  position:absolute;inset:1%;border-radius:50%;
  background:conic-gradient(from 80deg, rgba(255,255,255,0) 0%, #fff 18%, rgba(255,255,255,.08) 40%, #38e8ff 66%, rgba(255,255,255,0) 92%);
  -webkit-mask:radial-gradient(closest-side, transparent 71%, #000 72%, #000 78%, transparent 79%);
  mask:radial-gradient(closest-side, transparent 71%, #000 72%, #000 78%, transparent 79%);
  animation:spin 38s linear infinite reverse;opacity:.8;
}
.orb__ring--2{
  inset:11%;
  -webkit-mask:radial-gradient(closest-side, transparent 81%, #000 82%, #000 86%, transparent 87%);
  mask:radial-gradient(closest-side, transparent 81%, #000 82%, #000 86%, transparent 87%);
  animation-duration:19s;animation-direction:normal;opacity:.55;
}
.orb__glass{
  position:absolute;inset:17%;border-radius:50%;
  background:radial-gradient(circle at 31% 27%, rgba(255,255,255,.55), rgba(255,255,255,.05) 38%, transparent 62%);
  mix-blend-mode:screen;filter:blur(1.5px);
}
@keyframes spin{to{transform:rotate(360deg);}}
@keyframes breathe{0%,100%{transform:scale(1);opacity:.72;}50%{transform:scale(1.07);opacity:1;}}
.orb-facts{
  display:grid;grid-template-columns:repeat(3,1fr);gap:12px;
  margin-top:clamp(26px,3.4vw,44px);border-top:1px solid var(--line-soft);padding-top:18px;
}
.orb-facts dt{font-size:8px;letter-spacing:.24em;color:var(--ink-faint);text-transform:uppercase;}
.orb-facts dd{margin-top:6px;font-family:var(--serif);font-size:clamp(12px,1vw,14px);letter-spacing:.06em;color:var(--ink-dim);}

/* Colour chapter */
.chapter--color{text-align:center;overflow:hidden;}
.chapter--color::before{
  content:"COLOUR";position:absolute;left:50%;top:52%;transform:translate(-50%,-50%);
  font-family:var(--sans);font-weight:200;font-size:26vw;letter-spacing:.04em;
  color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.055);
  pointer-events:none;white-space:nowrap;
}
.chapter--color .chapter__text{margin-inline:auto;}
.chapter--color .chapter__note{margin-top:clamp(30px,4vw,44px);}
.swatches{
  position:relative;z-index:2;
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:clamp(10px,1.4vw,18px);
  margin-top:clamp(42px,6vw,72px);
}
.swatch{
  position:relative;display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-end;
  gap:5px;padding:clamp(16px,1.8vw,26px);
  aspect-ratio:3/4;overflow:hidden;text-align:left;
  border:1px solid var(--line-soft);background:rgba(255,255,255,.02);
  transition:border-color .5s,transform .7s var(--ease-out);
}
.swatch::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:var(--c);opacity:0;transform:translateY(14%);
  transition:opacity .6s var(--ease),transform .7s var(--ease-out);
}
.swatch:hover::before,.swatch:focus-visible::before{opacity:.95;transform:none;}
.swatch:hover{transform:translateY(-6px);border-color:var(--c);}
.swatch>*{position:relative;z-index:1;transition:color .5s;}
.swatch:hover .swatch__name,.swatch:hover .swatch__en,.swatch:hover .swatch__hex,.swatch:hover .swatch__mood,.swatch:hover .swatch__idx{color:var(--fg);}
.swatch__idx{position:absolute;top:clamp(14px,1.6vw,22px);left:clamp(16px,1.8vw,26px);font-family:var(--serif);font-size:10px;letter-spacing:.2em;color:var(--ink-faint);}
.swatch__dot{
  position:absolute;top:clamp(14px,1.7vw,24px);right:clamp(16px,1.8vw,26px);
  width:9px;height:9px;border-radius:50%;background:var(--c);
  box-shadow:0 0 26px var(--c),0 0 4px var(--c);
}
.swatch__name{font-family:var(--cn);font-weight:300;font-size:clamp(18px,1.75vw,26px);letter-spacing:.08em;line-height:1.2;}
.swatch__en{font-size:8px;letter-spacing:.26em;text-transform:uppercase;color:var(--ink-faint);}
.swatch__hex{font-family:var(--serif);font-size:11px;letter-spacing:.14em;color:var(--ink-faint);margin-top:4px;}
.swatch__mood{font-size:10px;letter-spacing:.08em;color:var(--ink-faint);margin-top:6px;opacity:0;transform:translateY(4px);transition:opacity .5s,transform .5s;}
.swatch:hover .swatch__mood{opacity:1;transform:none;}
/* resting colour presence — the chapter reads as colour before any hover */
.swatch::after{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(118% 82% at 50% 118%,color-mix(in srgb,var(--c) 60%,transparent) 0%,transparent 62%),
    linear-gradient(180deg,transparent 54%,color-mix(in srgb,var(--c) 18%,transparent) 100%);
  opacity:.6;transition:opacity .55s var(--ease);
}
.swatch:hover::after,.swatch:focus-visible::after{opacity:0;}
.swatch__dot{
  width:11px;height:11px;
  box-shadow:0 0 34px var(--c),0 0 6px var(--c),0 0 0 3px color-mix(in srgb,var(--c) 20%,transparent);
}

/* Form chapter */
.chapter--form{padding-bottom:0;}
.form-stage{
  position:relative;margin-top:clamp(32px,5vw,56px);
  height:clamp(360px,66vh,700px);
  border-block:1px solid var(--line-soft);
  overflow:hidden;background:#05060a;
}
.form-stage canvas{position:absolute;inset:0;width:100%;height:100%;}
.form-stage__label,.form-stage__hint{
  position:absolute;z-index:2;font-size:9px;letter-spacing:.28em;
  text-transform:uppercase;color:rgba(245,243,239,.42);pointer-events:none;
}
.form-stage__label{left:var(--gutter);bottom:22px;}
.form-stage__hint{right:var(--gutter);top:22px;}

/* Rhythm chapter */
.chapter--rhythm{text-align:center;overflow:hidden;}
.chapter--rhythm .chapter__text{margin-inline:auto;}
.rhythm-stage{position:relative;margin-top:clamp(44px,6vw,72px);}
.rhythm__word{
  position:absolute;left:50%;top:44%;transform:translate(-50%,-50%);
  font-family:var(--sans);font-weight:200;font-size:clamp(58px,13.5vw,186px);
  letter-spacing:.08em;white-space:nowrap;pointer-events:none;
  color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.09);
}
.rhythm__bars{
  position:relative;z-index:2;
  display:flex;align-items:flex-end;justify-content:center;
  gap:clamp(2px,.45vw,6px);
  height:clamp(150px,23vh,240px);
  max-width:1180px;margin-inline:auto;padding:0 var(--gutter);
}
.rhythm__bars i{
  display:block;flex:1;max-width:6px;height:100%;
  background:linear-gradient(to top,var(--accent) 0%,rgba(255,255,255,.9) 100%);
  border-radius:2px;transform:scaleY(.08);transform-origin:50% 100%;
  opacity:.9;will-change:transform;
}
.rhythm__actions{
  display:flex;flex-direction:column;align-items:center;gap:18px;
  margin-top:clamp(34px,4.5vw,54px);
}
.rhythm__hint{font-size:8px;letter-spacing:.3em;color:var(--ink-faint);text-transform:uppercase;}

.btn{
  position:relative;isolation:isolate;
  display:inline-flex;align-items:center;gap:12px;
  padding:16px 32px;border:1px solid var(--line);border-radius:999px;
  background:transparent;overflow:hidden;
  font-size:10px;letter-spacing:.26em;text-transform:uppercase;
  transition:color .5s,border-color .5s;
}
.btn::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:var(--accent);transform:translateY(101%);
  transition:transform .6s var(--ease-out);
}
.btn:hover::before{transform:translateY(0);}
.btn:hover{color:#08090e;border-color:var(--accent);}
.btn__dot{
  width:6px;height:6px;border-radius:50%;background:currentColor;
  box-shadow:0 0 12px currentColor;
  transition:background .4s;
}
@keyframes pulseDot{0%,100%{opacity:.5;transform:scale(.7);}50%{opacity:1;transform:scale(1.15);}}
.btn--ghost{border-color:var(--line-soft);color:var(--ink-dim);}
.btn--ghost:hover{color:#08090e;}

/* Gallery */
.chapter--gallery{padding-bottom:0;}
.gallery{
  position:relative;margin-top:clamp(32px,5vw,56px);
  overflow-x:auto;overflow-y:hidden;
  scrollbar-width:none;cursor:grab;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
}
.gallery::-webkit-scrollbar{display:none;}
.gallery.is-dragging{cursor:grabbing;scroll-snap-type:none;}
.gallery.is-dragging .tile__frame{border-color:rgba(245,243,239,.2);}
.gallery__track{
  display:flex;gap:clamp(14px,2vw,28px);
  padding:0 var(--gutter) 12px;
  width:max-content;
}
.tile{flex:0 0 auto;width:clamp(272px,31vw,430px);scroll-snap-align:center;}
.tile__frame{
  position:relative;aspect-ratio:4/3;overflow:hidden;
  background:#05060a;border:1px solid var(--line-soft);
}
.tile__frame canvas{width:100%;height:100%;transition:transform 1.4s var(--ease-out);}
.tile:hover .tile__frame canvas{transform:scale(1.055);}
.tile__frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,transparent 58%,rgba(5,6,10,.72) 100%);
}
.tile__meta{display:flex;align-items:baseline;gap:12px;padding-top:15px;font-size:10px;letter-spacing:.18em;color:var(--ink-faint);}
.tile__meta h3{font-family:var(--cn);font-weight:300;font-size:clamp(15px,1.4vw,19px);letter-spacing:.14em;color:var(--ink);}
.tile__meta em{margin-left:auto;font-style:normal;font-size:8px;letter-spacing:.26em;}
.gallery-bar{
  width:min(1320px,calc(100% - var(--gutter) * 2));
  margin:24px auto 0;height:1px;background:var(--line-soft);
}
.gallery-bar i{display:block;height:100%;background:var(--accent);transform-origin:left;transform:scaleX(0);box-shadow:0 0 10px var(--accent);}
.gallery__hint{
  text-align:center;margin-top:20px;
  font-size:8px;letter-spacing:.34em;color:var(--ink-faint);text-transform:uppercase;
}
/* ---------- 7. Finale & footer ---------- */
.finale{
  position:relative;overflow:hidden;
  padding:clamp(120px,20vh,240px) 0 clamp(70px,9vh,110px);
  text-align:center;
}
.finale::before{
  content:"";position:absolute;left:50%;top:48%;
  width:min(1100px,120vw);aspect-ratio:1;transform:translate(-50%,-50%);
  background:radial-gradient(circle,var(--accent-glow),transparent 62%);
  filter:blur(70px);opacity:.55;pointer-events:none;
}
.finale__inner{position:relative;z-index:2;}
.finale__title{
  margin-top:clamp(24px,4vw,46px);
  font-family:var(--cn);font-weight:200;
  font-size:clamp(34px,6.2vw,86px);line-height:1.24;letter-spacing:.03em;
}
.finale__title em{
  font-style:normal;
  background:linear-gradient(100deg,#ffc36b,#ff3d8b 35%,#7b5cff 68%,#38e8ff 100%);
  background-size:220% 100%;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:sheen 9s linear infinite;
}
@keyframes sheen{to{background-position:220% 0;}}
.finale__sub{margin-top:clamp(20px,3vw,32px);font-size:13px;letter-spacing:.2em;color:var(--ink-faint);}
.finale__actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:clamp(34px,4.5vw,52px);}
.finale__small{margin-top:clamp(40px,6vw,72px);font-size:8px;letter-spacing:.32em;color:rgba(245,243,239,.26);text-transform:uppercase;}

.footer{
  position:relative;z-index:2;
  display:flex;align-items:flex-end;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:30px var(--gutter) 38px;
  border-top:1px solid var(--line-soft);
}
.footer__brand{display:flex;flex-direction:column;gap:5px;}
.footer__mark{font-size:12px;letter-spacing:.34em;}
.footer__note{font-family:var(--serif);font-style:italic;font-size:12px;color:var(--ink-faint);letter-spacing:.06em;}
.footer__meta{display:flex;flex-direction:column;align-items:flex-end;gap:5px;font-size:8px;letter-spacing:.22em;color:rgba(245,243,239,.3);text-transform:uppercase;text-align:right;}

/* ---------- 8. Reveals ---------- */
.js [data-reveal]{
  opacity:0;transform:translateY(26px);
  transition:opacity 1.1s var(--ease-out),transform 1.3s var(--ease-out);
  transition-delay:var(--d,0s);
}
.js [data-reveal].is-in{opacity:1;transform:none;}

/* ---------- 9. Responsive ---------- */
@media (max-width:1100px){
  .hero__foot{gap:16px;}
  .hero__fact:nth-child(3){display:none;}
}
@media (max-width:900px){
  .chapter{padding:clamp(76px,11vh,120px) 0;}
  .hero__foot{bottom:22px;}
  .hero__facts{position:absolute;left:0;bottom:74px;}
  .hero__clock{display:none;}
  .swatches{grid-template-columns:repeat(2,1fr);}
  .chapter--color::before{font-size:34vw;}
}
@media (max-width:820px){
  .nav__links{display:none;}
  .hero{display:flex;flex-direction:column;justify-content:center;align-items:stretch;}
  .hero__inner{width:100%;max-width:720px;margin-inline:auto;}
  .hero__facts{display:none;}
  .hero__coords{display:none;}
  .footer{flex-direction:column;align-items:flex-start;}
  .footer__meta{align-items:flex-start;text-align:left;}
  .chart{}
}
@media (max-width:560px){
  .nav{padding-left:18px;padding-right:18px;gap:10px;}
  .nav__name{font-size:11px;letter-spacing:.22em;}
  .nav__name em{font-size:7px;letter-spacing:.18em;}
  .tour-btn{padding:8px 12px;gap:7px;background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.18);}
  .tour-btn__label{display:none;}
  .hero__sub{font-size:12px;letter-spacing:.12em;}
  .hero__sub .en{font-size:.9em;letter-spacing:.015em;}
  .hero__title{font-size:clamp(60px,17vw,120px);}
  .hero__eyebrow{font-size:8px;letter-spacing:.24em;gap:9px;}
  .hero__eyebrow span:nth-child(3){display:none;}
  .hero__eyebrow .dot{display:none;}
  .swatches{gap:8px;}
  .swatch{aspect-ratio:4/5;padding:14px;}
  .swatch__mood{display:none;}
  .orb-facts{grid-template-columns:1fr 1fr;}
  .orb-facts div:last-child{display:none;}
  .rhythm__word{font-size:22vw;}
  .form-stage__hint{display:none;}
  .tile{width:76vw;}
}

/* ---------- 9. Pointer vs touch copy ---------- */
.hint-touch{display:none;}
@media (hover:none),(pointer:coarse){
  .hint-pointer{display:none;}
  .hint-touch{display:inline;}
  .tile__open span{opacity:1;transform:none;padding:8px 12px;font-size:8px;
    border-color:rgba(245,243,239,.24);background:rgba(5,6,10,.45);}
  .tile__open{padding-bottom:18px;}
}
.is-touch .tile__open span{opacity:1;transform:none;padding:8px 12px;font-size:8px;
  border-color:rgba(245,243,239,.24);background:rgba(5,6,10,.45);}

/* ---------- 9.5 Live presence ---------- */
.footer__live{display:inline-flex;align-items:center;gap:8px;color:var(--ink-dim);}
.footer__live b{color:var(--ink);font-weight:400;font-variant-numeric:tabular-nums;}
.footer__dot{width:5px;height:5px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 10px var(--accent-glow);animation:presenceDot 2.6s ease-in-out infinite;}
@keyframes presenceDot{
  0%,100%{opacity:.35;transform:scale(.85);}
  50%{opacity:1;transform:scale(1.12);}
}

/* ---------- 9.6 Gallery · enter affordance ---------- */
.tile__spec{
  position:absolute;top:14px;right:16px;z-index:2;pointer-events:none;
  font-size:8px;letter-spacing:.2em;color:rgba(245,243,239,.45);
  text-shadow:0 1px 12px rgba(0,0,0,.6);
}
.tile__open{
  position:absolute;inset:0;z-index:3;width:100%;
  display:flex;align-items:flex-end;justify-content:center;
  padding:0 0 26px;border:0;background:transparent;cursor:pointer;
  -webkit-tap-highlight-color:transparent;
}
.tile__open span{
  display:inline-block;padding:10px 16px;
  border:1px solid rgba(245,243,239,.3);
  background:rgba(5,6,10,.5);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  font-family:var(--cn);font-size:9px;letter-spacing:.24em;color:var(--ink);
  opacity:0;transform:translateY(10px);
  transition:opacity .45s var(--ease-out),transform .45s var(--ease-out),border-color .45s;
}
.tile:hover .tile__open span,.tile__open:focus-visible span,.tile__open:focus span{
  opacity:1;transform:none;border-color:var(--accent);
}
.tile__open:focus-visible{outline:1px solid var(--accent);outline-offset:-1px;}
.tile:hover .tile__frame{border-color:rgba(245,243,239,.22);}
.tile__frame{transition:border-color .6s;}
.tile__seed{
  margin-left:10px;font-style:normal;font-size:8px;letter-spacing:.2em;
  color:rgba(245,243,239,.26);
}

/* ---------- 10. Studio overlay ---------- */
.studio{
  position:fixed;inset:0;z-index:120;
  display:flex;align-items:center;justify-content:center;
  padding:clamp(10px,2.2vw,32px);
  opacity:0;visibility:hidden;
  transition:opacity .45s var(--ease-out),visibility .45s;
}
.studio.is-open{opacity:1;visibility:visible;}
.studio__bg{
  position:absolute;inset:0;
  background:rgba(3,4,8,.9);
  backdrop-filter:blur(20px) saturate(1.15);
  -webkit-backdrop-filter:blur(20px) saturate(1.15);
}
.studio__box{
  position:relative;display:grid;
  grid-template-columns:minmax(0,1fr) 336px;
  gap:clamp(12px,1.4vw,24px);
  width:min(1380px,100%);height:min(88vh,880px);
}
.studio__stage{
  position:relative;min-height:0;overflow:hidden;background:#05060a;
  border:1px solid rgba(245,243,239,.12);
}
#studioCanvas{display:block;width:100%;height:100%;cursor:crosshair;touch-action:none;}
.studio__x{
  position:absolute;top:14px;right:14px;z-index:4;
  width:34px;height:34px;display:flex;align-items:center;justify-content:center;
  border-radius:50%;border:1px solid rgba(245,243,239,.2);
  background:rgba(6,7,12,.62);color:rgba(245,243,239,.72);
  font-size:15px;line-height:1;font-family:var(--cn);
  cursor:pointer;transition:border-color .3s var(--ease),color .3s var(--ease),background .3s var(--ease);
}
.studio__x:hover,.studio__x:focus-visible{border-color:var(--accent);color:var(--ink);background:rgba(6,7,12,.9);}
.studio__stagebar{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  display:flex;align-items:center;gap:18px;padding:16px 18px;
  font-size:8px;letter-spacing:.22em;color:rgba(245,243,239,.5);
  background:linear-gradient(0deg,rgba(5,6,10,.78),rgba(5,6,10,0));
  pointer-events:none;
}
.studio__stagebar .studio__hint{margin-left:auto;color:rgba(245,243,239,.3);}
.studio__share{
  pointer-events:auto;cursor:pointer;
  margin-left:18px;padding:6px 11px;border-radius:999px;
  border:1px solid rgba(245,243,239,.16);background:rgba(6,7,12,.5);
  color:rgba(245,243,239,.62);font-size:8px;letter-spacing:.2em;font-family:var(--cn);
  transition:border-color .3s var(--ease),color .3s var(--ease);
}
.studio__share:hover,.studio__share:focus-visible{border-color:var(--accent);color:var(--ink);}
.studio__toast{
  position:absolute;left:50%;bottom:64px;z-index:5;
  transform:translate(-50%,10px);opacity:0;visibility:hidden;
  padding:9px 16px;border-radius:999px;border:1px solid rgba(245,243,239,.16);
  background:rgba(6,7,12,.88);backdrop-filter:blur(10px);
  font-size:9px;letter-spacing:.18em;color:var(--ink);
  transition:opacity .35s var(--ease),transform .35s var(--ease),visibility .35s;
  pointer-events:none;
}
.studio__toast.is-live{opacity:1;visibility:visible;transform:translate(-50%,0);}

.studio__panel{
  display:flex;flex-direction:column;gap:18px;
  padding:clamp(18px,1.5vw,26px);
  border:1px solid rgba(245,243,239,.12);
  background:rgba(10,11,16,.72);
  overflow-y:auto;
}
.studio__kicker{
  font-size:8px;letter-spacing:.26em;color:var(--ink-faint);text-transform:uppercase;
}
.studio__kicker b{color:var(--accent);font-weight:400;}
.studio__head h3{
  margin-top:10px;font-family:var(--cn);font-weight:300;
  font-size:clamp(24px,2.2vw,32px);letter-spacing:.16em;color:var(--ink);
}
.studio__head em{
  display:block;margin-top:6px;font-family:var(--serif);font-style:italic;
  font-size:11px;letter-spacing:.28em;color:var(--ink-faint);
}
.studio__desc{
  margin-top:14px;font-size:12px;line-height:2;letter-spacing:.08em;color:var(--ink-dim);
}
.studio__controls{display:flex;flex-direction:column;gap:16px;margin-top:2px;}
.ctl{display:grid;grid-template-columns:1fr auto;align-items:center;gap:2px 10px;}
.ctl__name{font-size:10px;letter-spacing:.18em;color:var(--ink-dim);}
.ctl__name em{
  font-style:normal;font-size:7px;letter-spacing:.22em;
  color:rgba(245,243,239,.32);margin-left:8px;
}
.ctl__val{
  font-size:10px;color:rgba(245,243,239,.55);
  font-variant-numeric:tabular-nums;letter-spacing:.06em;
}
.ctl input[type="range"]{
  grid-column:1/-1;width:100%;height:16px;margin:2px 0 0;
  -webkit-appearance:none;appearance:none;background:transparent;cursor:pointer;
}
.ctl input[type="range"]::-webkit-slider-runnable-track{
  height:1px;background:rgba(245,243,239,.18);
}
.ctl input[type="range"]::-webkit-slider-thumb{
  -webkit-appearance:none;width:10px;height:10px;margin-top:-4.5px;
  border-radius:50%;background:var(--accent);border:0;
  box-shadow:0 0 0 3px rgba(5,6,10,.9),0 0 14px var(--accent-glow);
}
.ctl input[type="range"]::-moz-range-track{height:1px;background:rgba(245,243,239,.18);}
.ctl input[type="range"]::-moz-range-thumb{
  width:10px;height:10px;border-radius:50%;background:var(--accent);border:0;
  box-shadow:0 0 12px var(--accent-glow);
}
.ctl input[type="range"]:focus-visible{outline:1px solid var(--accent);outline-offset:6px;}

.studio__actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;}
.studio__actions button,.studio__nav button{
  padding:11px 10px;border:1px solid rgba(245,243,239,.16);
  background:transparent;color:var(--ink-dim);
  font-family:var(--cn);font-size:10px;letter-spacing:.16em;cursor:pointer;
  transition:border-color .3s,color .3s,background .3s;
}
.studio__actions button:hover,.studio__nav button:hover{
  border-color:var(--accent);color:var(--ink);background:rgba(245,243,239,.04);
}
.studio__actions button.is-active{border-color:var(--accent);color:var(--ink);}
.studio__note{
  margin-top:auto;padding-top:14px;
  border-top:1px solid rgba(245,243,239,.08);
  font-size:9px;line-height:1.95;letter-spacing:.14em;color:rgba(245,243,239,.34);
}
.studio__note span{color:rgba(245,243,239,.2);}
.studio__nav{display:flex;gap:8px;padding-top:2px;}
.studio__nav button{flex:1;}
.studio__nav .studio__close{border-color:rgba(245,243,239,.3);color:var(--ink);}

body.studio-open{overflow:hidden;}

@media (max-width:900px){
  .studio{padding:0;}
  .studio__box{
    grid-template-columns:1fr;grid-template-rows:minmax(0,1fr) auto;
    height:100%;gap:0;
  }
  .studio__stage{border-left:0;border-right:0;border-top:0;}
  .studio__panel{
    max-height:46vh;border-left:0;border-right:0;border-bottom:0;
    gap:14px;padding:20px var(--gutter) 24px;
  }
  .studio__head h3{font-size:26px;}
  .studio__desc{font-size:12px;line-height:1.9;}
  .studio__stagebar{padding:12px 16px;gap:12px;}
  .studio__stagebar .studio__hint{display:none;}
}

/* ---------- 10.5 Refract · interactive chapter ---------- */
.chapter--refract{overflow:hidden;padding-bottom:clamp(86px,12vh,150px);}
.chapter--refract::before{
  content:"REFRACT";position:absolute;right:-1.5vw;top:12%;
  font-family:var(--sans);font-weight:200;font-size:clamp(80px,13vw,210px);
  letter-spacing:.09em;line-height:.8;
  color:transparent;-webkit-text-stroke:1px rgba(56,232,255,.055);
  pointer-events:none;white-space:nowrap;
}
.refract__grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:minmax(0,.86fr) minmax(0,1.14fr);
  gap:clamp(34px,6vw,86px);align-items:center;
}
.refract__copy{max-width:560px;}
.refract__copy .chapter__text{max-width:44ch;}
.refract__lead{
  margin-top:clamp(12px,1.5vw,18px);
  color:var(--ink-faint)!important;
  font-size:clamp(12px,1vw,14px)!important;
}
.refract__facts{
  display:grid;grid-template-columns:repeat(3,1fr);gap:14px;
  margin-top:clamp(26px,3.4vw,40px);
  padding-top:18px;border-top:1px solid var(--line-soft);
}
.refract__facts dt{
  font-size:8px;letter-spacing:.26em;text-transform:uppercase;
  color:rgba(245,243,239,.3);
}
.refract__facts dd{
  margin-top:6px;font-family:var(--cn);font-weight:300;
  font-size:clamp(13px,1.2vw,17px);letter-spacing:.1em;color:var(--ink-dim);
}
.refract__stage-wrap{position:relative;isolation:isolate;min-width:0;}
.refract__stage-wrap::before{
  content:"";position:absolute;inset:3% -4% 10%;
  z-index:-1;pointer-events:none;
  background:radial-gradient(60% 60% at 52% 46%,rgba(56,232,255,.14),transparent 72%);
  filter:blur(46px);
}
.refract-stage{
  position:relative;display:block;width:min(100%,620px);margin-inline:auto;
  aspect-ratio:1/1;padding:0;overflow:hidden;isolation:isolate;
  border:1px solid rgba(56,232,255,.17);
  background:
    radial-gradient(72% 66% at 50% 50%,#071015 0%,#04070a 62%,#030507 100%);
  color:var(--ink);cursor:pointer;text-align:left;
  transition:border-color .55s var(--ease-out),transform .7s var(--ease-out),box-shadow .7s;
}
.refract-stage::before{
  content:"";position:absolute;inset:11px;z-index:3;pointer-events:none;
  border:1px solid rgba(245,243,239,.06);
  transition:border-color .55s var(--ease-out);
}
.refract-stage:hover,.refract-stage:focus-visible{
  border-color:rgba(56,232,255,.55);
  transform:translateY(-4px);
  box-shadow:0 34px 80px -36px rgba(56,232,255,.36);
  outline:none;
}
.refract-stage:hover::before,.refract-stage:focus-visible::before{border-color:rgba(56,232,255,.16);}
.refract-stage__art{
  display:block;width:100%;height:100%;
  transition:transform 1.6s var(--ease-out),opacity .8s;
}
.refract-stage:hover .refract-stage__art{transform:scale(1.018);}
.refract-stage__art text{font-family:var(--sans);}
.refract-stage__glow{
  position:absolute;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(42% 36% at 35% 50%,rgba(255,239,204,.1),transparent 70%);
  opacity:.5;transition:opacity .7s var(--ease);
}
.refract-stage:hover .refract-stage__glow{opacity:1;}
.refract-stage__badge,.refract-stage__meta{
  position:absolute;top:20px;z-index:4;
  font-size:8px;letter-spacing:.24em;text-transform:uppercase;
  color:rgba(245,243,239,.54);
}
.refract-stage__badge{left:22px;display:inline-flex;align-items:center;gap:8px;}
.refract-stage__badge i{
  width:5px;height:5px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 9px var(--cyan);animation:presenceDot 2.6s ease-in-out infinite;
}
.refract-stage__meta{right:22px;color:rgba(245,243,239,.32);font-family:var(--serif);letter-spacing:.18em;}
.refract-stage__cta{
  position:absolute;left:50%;bottom:24px;z-index:4;
  display:inline-flex;align-items:center;gap:11px;
  transform:translateX(-50%);white-space:nowrap;
  padding:11px 18px;border:1px solid rgba(245,243,239,.22);
  background:rgba(4,8,11,.7);backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  font-family:var(--cn);font-size:10px;letter-spacing:.22em;color:var(--ink);
  transition:background .45s var(--ease-out),color .45s,border-color .45s;
}
.refract-stage__cta i{
  font-style:normal;font-family:var(--sans);font-size:7px;
  letter-spacing:.2em;color:var(--cyan);transition:color .45s;
}
.refract-stage__cta b{font-weight:400;font-size:13px;line-height:1;transition:transform .45s var(--ease-out);}
.refract-stage:hover .refract-stage__cta,.refract-stage:focus-visible .refract-stage__cta{
  background:var(--cyan);border-color:var(--cyan);color:#031014;
}
.refract-stage:hover .refract-stage__cta i,.refract-stage:focus-visible .refract-stage__cta i{color:#031014;}
.refract-stage:hover .refract-stage__cta b{transform:translate(2px,-2px);}
.refract__caption{
  display:flex;justify-content:space-between;gap:18px;
  width:min(100%,620px);margin:14px auto 0;
  font-size:8px;letter-spacing:.24em;text-transform:uppercase;
  color:rgba(245,243,239,.26);
}

/* ---------- 10.6 Refract · fullscreen exhibit ---------- */
.refract-overlay{
  position:fixed;inset:0;z-index:150;
  display:flex;flex-direction:column;
  background:#04060a;
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .5s var(--ease-out),transform .65s var(--ease-out),visibility .5s;
}
.refract-overlay::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;z-index:6;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);
  opacity:.55;pointer-events:none;
}
.refract-overlay.is-open{opacity:1;visibility:visible;transform:none;}
.refract-chrome{
  position:relative;z-index:4;flex:0 0 auto;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px;
  min-height:58px;padding:12px clamp(16px,3vw,34px);
  border-bottom:1px solid rgba(245,243,239,.1);
  background:rgba(4,6,10,.92);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
}
.refract-chrome__kicker{
  font-size:8px;letter-spacing:.26em;text-transform:uppercase;color:rgba(245,243,239,.32);
}
.refract-chrome__kicker span{color:rgba(245,243,239,.72);}
.refract-chrome__title{
  font-family:var(--cn);font-weight:300;font-size:15px;letter-spacing:.3em;
  color:var(--ink);white-space:nowrap;text-indent:.3em;
}
.refract-chrome__title em{
  margin-left:9px;font-family:var(--serif);font-style:italic;
  font-size:10px;letter-spacing:.18em;color:rgba(245,243,239,.38);text-indent:0;
}
.refract-close{
  justify-self:end;display:inline-flex;align-items:center;gap:10px;
  min-height:34px;padding:6px 10px 6px 14px;
  border:1px solid rgba(245,243,239,.16);border-radius:999px;
  background:transparent;color:rgba(245,243,239,.66);
  font-family:var(--cn);font-size:9px;letter-spacing:.16em;cursor:pointer;
  transition:border-color .3s,color .3s,background .3s;
}
.refract-close kbd{
  font-family:var(--sans);font-size:7px;letter-spacing:.14em;
  color:rgba(245,243,239,.3);border:1px solid rgba(245,243,239,.12);
  border-radius:3px;padding:2px 4px;
}
.refract-close b{font-weight:300;font-size:15px;line-height:1;color:rgba(245,243,239,.5);}
.refract-close:hover,.refract-close:focus-visible{
  border-color:var(--cyan);color:var(--ink);background:rgba(56,232,255,.06);outline:none;
}
.refract-close:hover b{color:var(--cyan);}
.refract-frame{position:relative;flex:1 1 auto;min-height:0;background:#050708;}
.refract-frame iframe{
  position:absolute;inset:0;width:100%;height:100%;border:0;
  opacity:0;transition:opacity .65s var(--ease-out);
}
.refract-frame.is-ready iframe{opacity:1;}
.refract-loading{
  position:absolute;inset:0;z-index:3;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  background:#050708;color:rgba(245,243,239,.5);
  transition:opacity .5s,visibility .5s;
}
.refract-frame.is-ready .refract-loading{opacity:0;visibility:hidden;pointer-events:none;}
.refract-loading__mark{
  font-family:var(--cn);font-weight:200;font-size:clamp(48px,7vw,78px);
  line-height:1;color:rgba(245,243,239,.8);
  text-shadow:0 0 60px rgba(56,232,255,.22);
}
.refract-loading__word{font-size:8px;letter-spacing:.4em;text-indent:.4em;color:rgba(245,243,239,.25);}
.refract-loading__line{display:block;width:120px;height:1px;background:rgba(245,243,239,.12);overflow:hidden;}
.refract-loading__line i{
  display:block;height:100%;background:var(--cyan);transform-origin:left;
  animation:rfLoad 1.5s var(--ease-out) infinite;
}
@keyframes rfLoad{
  0%{transform:scaleX(0);opacity:.2;}
  45%{transform:scaleX(1);opacity:1;}
  100%{transform:scaleX(1);transform-origin:right;opacity:0;}
}
body.refract-open{overflow:hidden;}
body.refract-open .cursor__dot,
body.refract-open .cursor__ring{opacity:0!important;}

@media (max-width:900px){
  .chapter--refract::before{top:6%;font-size:26vw;}
  .refract__grid{grid-template-columns:1fr;gap:clamp(30px,6vw,50px);}
  .refract__copy{max-width:640px;}
  .refract-stage{width:min(100%,640px);}
  .refract__caption{width:min(100%,640px);}
  .refract-chrome{grid-template-columns:auto 1fr auto;gap:12px;}
  .refract-chrome__kicker{display:none;}
  .refract-chrome__title{font-size:13px;text-align:left;justify-self:start;}
}
@media (max-width:560px){
  .refract__facts{gap:8px;}
  .refract__facts dt{font-size:7px;letter-spacing:.18em;}
  .refract__facts dd{font-size:13px;}
  .refract-stage__badge,.refract-stage__meta{top:16px;font-size:7px;letter-spacing:.16em;}
  .refract-stage__badge{left:18px;}
  .refract-stage__meta{right:18px;}
  .refract-stage__cta{bottom:18px;padding:10px 15px;font-size:9px;letter-spacing:.18em;}
  .refract__caption{font-size:7px;letter-spacing:.16em;}
  .refract-chrome{min-height:52px;padding:9px 14px;}
  .refract-chrome__title{letter-spacing:.2em;font-size:12px;text-indent:.2em;}
  .refract-chrome__title em{display:none;}
  .refract-close{gap:7px;padding:6px 9px 6px 11px;font-size:8px;letter-spacing:.12em;}
  .refract-close kbd{display:none;}
  .refract-close b{font-size:14px;}
  .refract-loading__word{font-size:7px;letter-spacing:.28em;}
}

/* ---------- 11. Reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .marquee__track{animation:none;}
  .hero__char{transform:none;opacity:1;}
  .js [data-reveal]{opacity:1;transform:none;}
}