:root{
  --navy:#071725;
  --navy-2:#0e2a40;
  --navy-3:#17415f;
  --ink:#112b40;
  --ink-soft:#4b6476;
  --cream:#f4efe6;
  --paper:#fffdfa;
  --paper-blue:#edf5f7;
  --paper-warm:#f5ecdf;
  --ice:#637ff1;
  --cyan:#38b9e4;
  --green:#34b978;
  --gold:#ffc05c;
  --orange:#ff8a4d;
  --red:#ff543d;
  --purple:#7869df;
  --line:rgba(17,43,64,.12);
  --shadow:0 24px 70px rgba(7,23,37,.13);
  --shadow-sm:0 14px 38px rgba(7,23,37,.08);
  --radius:28px;
  --max:1200px;
  --spectrum:linear-gradient(90deg,var(--ice) 0%,var(--cyan) 25%,var(--green) 45%,var(--gold) 67%,var(--orange) 82%,var(--red) 100%);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,Aptos,"Segoe UI",system-ui,-apple-system,sans-serif;
  color:var(--ink);
  line-height:1.6;
  background:var(--cream);
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
button,input{font:inherit}
svg{display:block;width:100%;height:100%}
.wrap{width:min(calc(100% - 42px),var(--max));margin-inline:auto}
.muted{color:var(--ink-soft)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;text-transform:uppercase;letter-spacing:.16em;font-weight:900;font-size:.74rem;color:var(--ink-soft)}
.eyebrow::before{content:"";width:34px;height:3px;border-radius:999px;background:var(--spectrum)}

/* NAV */
.nav{position:sticky;top:0;z-index:100;color:white;background:rgba(7,23,37,.88);backdrop-filter:blur(18px);border-bottom:1px solid rgba(255,255,255,.08);box-shadow:0 10px 34px rgba(7,23,37,.2)}
.nav::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--spectrum);opacity:.72}
.nav-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:26px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:900;white-space:nowrap}
.brand-mark{font-size:1.32rem;letter-spacing:-.05em;padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.11);box-shadow:inset 0 1px rgba(255,255,255,.13)}
.brand-name{font-size:.77rem;letter-spacing:.1em;color:rgba(255,255,255,.66)}
.nav-links{display:flex;align-items:center;gap:22px;font-size:.91rem}
.nav-links a{position:relative;text-decoration:none;color:rgba(255,255,255,.73);font-weight:700;padding:11px 0}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:3px;height:2px;border-radius:999px;background:linear-gradient(90deg,var(--gold),var(--red));transform:scaleX(0);transform-origin:left;transition:.22s ease}
.nav-links a:hover,.nav-links a.active,.nav-links a:focus-visible{color:white}
.nav-links a:hover::after,.nav-links a.active::after,.nav-links a:focus-visible::after{transform:scaleX(1)}
.menu-btn{display:none;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.06);color:white;border-radius:999px;padding:9px 14px;font-weight:850}

/* BUTTONS */
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{border:0;border-radius:999px;padding:14px 22px;font-weight:900;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,#fffdfa,#ffefd0);color:var(--navy);box-shadow:0 14px 32px rgba(255,192,92,.2)}
.btn-ghost{border:1px solid rgba(255,255,255,.55);background:rgba(255,255,255,.03);color:white}
.btn-dark{background:linear-gradient(135deg,var(--navy),#194563);color:white;box-shadow:0 12px 30px rgba(7,23,37,.17)}

/* HOME HERO */
.hero{position:relative;overflow:hidden;color:white;background:
  radial-gradient(circle at 82% 18%,rgba(255,84,61,.27),transparent 26%),
  radial-gradient(circle at 14% 82%,rgba(56,185,228,.18),transparent 31%),
  linear-gradient(155deg,#06131f 0%,#092238 57%,#123954 100%)}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(to bottom,#000 0%,transparent 94%);pointer-events:none}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:9px;background:var(--spectrum)}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.06fr .94fr;gap:clamp(46px,7vw,104px);align-items:center;padding:100px 0 122px}
.hero-copy h1{margin:10px 0 14px;font-size:clamp(6.2rem,14vw,11.8rem);line-height:.78;letter-spacing:-.085em;color:white;text-shadow:0 18px 50px rgba(0,0,0,.22)}
.hero-copy h1 .degree{color:var(--gold)}
.hero-copy h2{margin:0 0 20px;font-size:clamp(1.85rem,4.2vw,4rem);line-height:1.02;letter-spacing:-.05em;max-width:760px}
.hero-copy p{max-width:680px;font-size:clamp(1.04rem,1.45vw,1.2rem);color:rgba(255,255,255,.8)}
.hero .eyebrow,.page-hero .eyebrow{color:var(--gold)}
.hero .eyebrow::before,.page-hero .eyebrow::before{background:linear-gradient(90deg,var(--gold),var(--red))}
.formula-pill{display:inline-flex;margin-top:22px;padding:11px 18px;border:1px solid rgba(255,255,255,.18);border-radius:999px;background:rgba(255,255,255,.08);font-weight:900;letter-spacing:.02em;backdrop-filter:blur(12px)}

/* HERO THERMOMETER */
.hero-scale{position:relative;width:min(350px,80vw);height:575px;margin-inline:auto;filter:drop-shadow(0 28px 40px rgba(0,0,0,.18))}
.hero-scale::before{content:"";position:absolute;left:48%;top:80px;transform:translateX(-50%);width:230px;height:330px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.1),transparent 66%);filter:blur(10px)}
.tube{position:absolute;left:48%;transform:translateX(-50%);top:24px;bottom:65px;width:52px;border-radius:34px 34px 14px 14px;background:linear-gradient(90deg,rgba(255,255,255,.04),rgba(255,255,255,.15),rgba(255,255,255,.04));border:2px solid rgba(255,255,255,.45);box-shadow:inset 0 0 26px rgba(255,255,255,.09);overflow:hidden}
.tube::after{content:"";position:absolute;top:16px;bottom:16px;left:10px;width:5px;border-radius:999px;background:rgba(255,255,255,.24)}
.tube-fill{position:absolute;bottom:0;left:8px;right:8px;height:37%;border-radius:18px 18px 7px 7px;background:linear-gradient(to top,#d92f29,#ff5f48 55%,#ff9a75);box-shadow:0 0 30px rgba(255,84,61,.48)}
.bulb{position:absolute;left:48%;transform:translateX(-50%);bottom:10px;width:122px;height:122px;border-radius:50%;border:3px solid rgba(255,255,255,.44);background:radial-gradient(circle at 35% 29%,#ffe0d7 0 4%,#ff684f 9%,#e3352d 58%,#8b1118 100%);box-shadow:0 18px 50px rgba(0,0,0,.28),0 0 52px rgba(255,84,61,.28)}
.scale-line{position:absolute;left:48%;top:20px;bottom:78px;width:190px;transform:translateX(-50%);border-right:1px solid rgba(255,255,255,.13)}
.scale-tick{position:absolute;right:-92px;display:flex;align-items:center;gap:9px;color:rgba(255,255,255,.7);font-weight:750;font-variant-numeric:tabular-nums}
.scale-tick::before{content:"";width:35px;height:1px;background:rgba(255,255,255,.36)}
.scale-tick strong{font-size:1.08rem;color:white}.t0{bottom:0}.t40{bottom:20%}.t74{bottom:37%}.t100{bottom:50%}.t200{bottom:100%}
.hero-scale-note{position:absolute;left:-10px;bottom:14px;width:150px;color:rgba(255,255,255,.6);font-size:.78rem}

/* LANDMARK STRIP */
.anchor-strip{position:relative;z-index:5;margin-top:-48px}
.anchors{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.anchor-card{position:relative;overflow:hidden;background:rgba(255,253,250,.96);border:1px solid rgba(17,43,64,.07);border-radius:26px;padding:26px;box-shadow:var(--shadow);text-decoration:none;transition:.2s ease}
.anchor-card:hover{transform:translateY(-4px);box-shadow:0 30px 74px rgba(7,23,37,.16)}
.anchor-card::before{content:"";position:absolute;left:0;right:0;top:0;height:6px;background:var(--spectrum)}
.anchor-icon{width:56px;height:56px;border-radius:18px;padding:13px;margin-bottom:18px;background:#edf4f7;color:var(--ice);box-shadow:inset 0 0 0 1px rgba(17,43,64,.06)}
.anchor-card:nth-child(2) .anchor-icon{background:#ecf8f1;color:var(--green)}
.anchor-card:nth-child(3) .anchor-icon{background:#fff0ec;color:var(--red)}
.anchor-card .big{font-size:clamp(2.6rem,5vw,4.6rem);font-weight:950;letter-spacing:-.075em;line-height:.95}
.anchor-card p{margin:12px 0 0;color:var(--ink-soft);max-width:29ch}.anchor-card:nth-child(1) .big{color:var(--ice)}.anchor-card:nth-child(2) .big{color:var(--green)}.anchor-card:nth-child(3) .big{color:var(--red)}

/* PAGE HERO */
.page-hero{position:relative;overflow:hidden;color:white;background:
 radial-gradient(circle at 87% 18%,rgba(255,192,92,.17),transparent 26%),
 radial-gradient(circle at 10% 90%,rgba(56,185,228,.12),transparent 25%),
 linear-gradient(155deg,#06131f,#0a2338 55%,#123a55 100%)}
.page-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:46px 46px;mask-image:linear-gradient(to right,#000 0%,transparent 100%)}
.page-hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:6px;background:var(--spectrum)}
.page-hero-layout{position:relative;z-index:2;min-height:520px;display:grid;grid-template-columns:1.02fr .98fr;gap:70px;align-items:center;padding:74px 0 84px}
.page-hero-copy{max-width:720px}
.page-hero h1{margin:10px 0 18px;font-size:clamp(3.5rem,7vw,6.7rem);line-height:.92;letter-spacing:-.065em}
.page-hero p{max-width:720px;font-size:1.1rem;color:rgba(255,255,255,.77)}
.breadcrumbs{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;margin-bottom:16px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.1);font-size:.8rem;color:rgba(255,255,255,.66)}
.breadcrumbs a{text-decoration:none;color:white}
.page-hero-art{min-height:340px;display:grid;place-items:center;position:relative}

/* page-specific hero art */
.thermostat-pair{display:flex;align-items:center;justify-content:center;gap:14px;transform:rotate(-2deg)}
.thermostat-screen{width:185px;border-radius:28px;padding:24px 22px;background:linear-gradient(160deg,#f9fbfc,#dce8ed);color:var(--ink);border:1px solid rgba(255,255,255,.8);box-shadow:0 28px 50px rgba(0,0,0,.22),inset 0 1px rgba(255,255,255,.9)}
.thermostat-screen span{display:block;font-size:.66rem;letter-spacing:.14em;font-weight:900;color:var(--ink-soft)}
.thermostat-screen strong{display:block;font-size:3.15rem;line-height:1;letter-spacing:-.07em;margin:20px 0 10px}.thermostat-screen small{color:var(--ink-soft)}
.g-screen{background:linear-gradient(160deg,#fff9e9,#ffe5ad)}.g-screen strong{color:#d74c2e}
.math-chip{width:64px;height:64px;display:grid;place-items:center;border-radius:50%;background:var(--red);color:white;font-weight:950;font-size:1.3rem;box-shadow:0 16px 34px rgba(255,84,61,.3);z-index:3}
.art-caption{position:absolute;bottom:8px;font-size:.88rem;letter-spacing:.05em;color:rgba(255,255,255,.64)}

.dial{position:relative;width:320px;height:320px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(from 225deg,var(--ice),var(--cyan),var(--green),var(--gold),var(--red),rgba(255,255,255,.12) 82%);box-shadow:0 24px 60px rgba(0,0,0,.22)}
.dial::before{content:"";position:absolute;inset:18px;border-radius:50%;background:linear-gradient(145deg,#0b2033,#123b56);box-shadow:inset 0 0 0 1px rgba(255,255,255,.12)}
.dial::after{content:"";position:absolute;width:8px;height:118px;top:47px;left:50%;transform-origin:50% 111px;transform:translateX(-50%) rotate(42deg);border-radius:999px;background:linear-gradient(#fff,var(--gold));box-shadow:0 0 18px rgba(255,192,92,.4)}
.dial-center{position:relative;z-index:2;text-align:center}.dial-center span{display:block;font-size:.7rem;letter-spacing:.16em;color:rgba(255,255,255,.58);font-weight:900}.dial-center strong{display:block;font-size:4.6rem;line-height:1;letter-spacing:-.08em;color:white}.dial-center small{color:rgba(255,255,255,.7)}
.dial-tags{position:absolute;inset:0;pointer-events:none}.dial-tags span{position:absolute;padding:6px 10px;border-radius:999px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.12);font-size:.75rem;font-weight:900}.dial-tags span:nth-child(1){left:0;bottom:45px}.dial-tags span:nth-child(2){right:-8px;top:70px}.dial-tags span:nth-child(3){right:14px;bottom:32px}

.hero-art-learn{padding:20px}
.learn-scale{position:relative;width:360px;height:330px;border-radius:34px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);box-shadow:0 28px 60px rgba(0,0,0,.17);backdrop-filter:blur(12px)}
.learn-gradient{position:absolute;left:64px;top:38px;bottom:38px;width:20px;border-radius:999px;background:linear-gradient(to top,var(--ice),var(--cyan),var(--green),var(--gold),var(--red));box-shadow:0 0 30px rgba(56,185,228,.2)}
.learn-marker{position:absolute;left:106px;display:flex;align-items:baseline;gap:10px;color:white}.learn-marker::before{content:"";position:absolute;left:-42px;width:32px;height:1px;background:rgba(255,255,255,.38)}.learn-marker b{font-size:1.65rem;letter-spacing:-.05em}.learn-marker span{font-size:.86rem;color:rgba(255,255,255,.63)}
.learn-marker.m0{bottom:35px}.learn-marker.m40{bottom:91px}.learn-marker.m74{bottom:139px}.learn-marker.m100{bottom:177px}.learn-marker.m200{top:28px}

.history-stack{position:relative;width:390px;height:330px}.history-scale-card{position:absolute;width:170px;height:210px;padding:22px;border-radius:26px;border:1px solid rgba(255,255,255,.13);background:rgba(255,255,255,.08);box-shadow:0 24px 50px rgba(0,0,0,.18);backdrop-filter:blur(12px);display:flex;flex-direction:column;justify-content:flex-end}.history-scale-card span{position:absolute;top:18px;right:18px;font-size:.7rem;letter-spacing:.12em;color:rgba(255,255,255,.55)}.history-scale-card strong{font-size:4rem;line-height:.9;letter-spacing:-.07em}.history-scale-card small{color:rgba(255,255,255,.62);margin-top:8px}.history-scale-card.f{left:0;top:36px;color:var(--gold);transform:rotate(-7deg)}.history-scale-card.c{left:104px;top:0;color:var(--cyan);z-index:2;transform:rotate(2deg)}.history-scale-card.k{right:0;top:44px;color:#fff;transform:rotate(8deg)}.history-scale-card.g{left:118px;bottom:-12px;height:130px;width:158px;color:var(--red);z-index:4;transform:rotate(-2deg);background:rgba(255,84,61,.12)}

.spec-sheet{width:350px;min-height:360px;border-radius:16px;background:linear-gradient(180deg,#f7fbfd,#e7eff3);padding:24px;color:var(--ink);box-shadow:0 32px 65px rgba(0,0,0,.25);transform:rotate(3deg);position:relative;overflow:hidden}.spec-sheet::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(31,81,111,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(31,81,111,.06) 1px,transparent 1px);background-size:18px 18px}.spec-sheet>*{position:relative}.spec-sheet-head{display:flex;justify-content:space-between;align-items:center;font-size:.7rem;letter-spacing:.12em;font-weight:900;color:var(--ink-soft)}.spec-sheet-head b{font-size:2.4rem;color:var(--red)}.spec-sheet-title{font-weight:950;font-size:1.15rem;letter-spacing:.04em;margin-top:26px}.spec-sheet-formula{font-size:3rem;letter-spacing:-.05em;font-weight:900;margin:24px 0;color:var(--navy)}.spec-sheet-rule{height:5px;border-radius:999px;background:var(--spectrum);margin-bottom:24px}.spec-sheet-lines{display:grid;gap:9px}.spec-sheet-lines i{height:7px;border-radius:999px;background:#c8d7df}.spec-sheet-lines i:nth-child(2){width:83%}.spec-sheet-lines i:nth-child(3){width:92%}.spec-sheet-lines i:nth-child(4){width:65%}.spec-sheet-doi{margin-top:26px;font-size:.72rem;font-weight:850;color:var(--ink-soft)}

.hero-art-landmark .landmark-orbit{width:330px;height:330px;border-radius:50%;display:grid;place-items:center;align-content:center;text-align:center;border:1px solid rgba(255,255,255,.15);background:radial-gradient(circle,rgba(255,255,255,.12),rgba(255,255,255,.03) 56%,transparent 57%);box-shadow:0 0 0 22px rgba(255,255,255,.03),0 0 0 46px rgba(255,255,255,.018)}
.landmark-icon{width:74px;height:74px;padding:14px;border-radius:24px;margin-bottom:10px}.landmark-cold .landmark-icon{color:#9fb6ff;background:rgba(99,127,241,.16)}.landmark-human .landmark-icon{color:#75e2a5;background:rgba(52,185,120,.15)}.landmark-hot .landmark-icon{color:#ff927f;background:rgba(255,84,61,.15)}
.landmark-orbit strong{display:block;color:white;font-size:5.2rem;line-height:1;letter-spacing:-.08em}.landmark-orbit span{color:rgba(255,255,255,.66);font-weight:800}

/* SECTION RHYTHM */
section{position:relative;padding:98px 0}
.section-cool{background:linear-gradient(180deg,#eaf3f5,#eef6f7)}
.section-warm{background:linear-gradient(180deg,#f4eadc,#f8f1e7)}
.section-head{display:grid;grid-template-columns:.75fr 1.25fr;gap:42px;align-items:end;margin-bottom:42px;position:relative}
.section-head h2{margin:0;font-size:clamp(2.5rem,5vw,4.9rem);line-height:.96;letter-spacing:-.055em}.section-head h2::after{content:"";display:block;margin-top:15px;width:84px;height:5px;border-radius:999px;background:linear-gradient(90deg,var(--gold),var(--red))}
.section-head p{margin:0;max-width:700px;font-size:1.07rem;color:var(--ink-soft)}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card,.feature,.thermo-panel,.convert-panel,.climate-card,.nav-card,.quiz,.citation-box{position:relative;overflow:hidden;background:rgba(255,253,250,.96);border:1px solid rgba(17,43,64,.08);box-shadow:var(--shadow-sm)}
.card::before,.feature::before,.thermo-panel::before,.convert-panel::before,.climate-card::before,.nav-card::before,.quiz::before,.citation-box::before{content:"";position:absolute;left:0;right:0;top:0;height:5px;background:var(--spectrum)}
.card{border-radius:var(--radius);padding:30px;transition:.2s ease}.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.card h3{margin:0 0 10px;font-size:1.42rem;letter-spacing:-.02em}.card p{margin:0;color:var(--ink-soft)}.card .letter{font-family:Georgia,serif;font-size:3.55rem;line-height:1;font-weight:700;color:var(--red)}
.number-card .big{font-size:3.75rem;font-weight:950;letter-spacing:-.07em;line-height:.95}.number-card .equiv{margin:10px 0 8px;font-weight:900;color:var(--ink-soft)}
.feature{border-radius:34px;padding:clamp(32px,5vw,58px)}.feature h2{margin:0 0 14px}.giant-formula{font-size:clamp(3.3rem,8vw,6.5rem);font-weight:950;letter-spacing:-.075em;line-height:.95}.giant-formula span{color:var(--red)}
.callout{margin-top:22px;border-radius:22px;padding:24px 26px;background:linear-gradient(125deg,var(--navy),#164564);color:white;box-shadow:0 18px 40px rgba(7,23,37,.18)}.callout strong{color:var(--gold)}

/* THERMOSTAT MOCKUP */
.thermostat-demo{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:center;margin-bottom:30px;padding:24px;border-radius:26px;background:linear-gradient(145deg,#eef4f6,#fdfbf7);border:1px solid rgba(17,43,64,.08)}
.thermostat-demo.compact{margin:28px 0 8px}
.thermo-ui{min-height:190px;border-radius:28px;padding:24px;background:linear-gradient(160deg,#f9fbfc,#dce8ed);box-shadow:0 20px 40px rgba(7,23,37,.1),inset 0 1px white;display:flex;flex-direction:column;justify-content:center;text-align:center}.g-ui{background:linear-gradient(160deg,#fff9e8,#ffe7b2)}
.thermo-ui-label{font-size:.7rem;letter-spacing:.16em;font-weight:950;color:var(--ink-soft)}.thermo-ui-value{font-size:clamp(3rem,6vw,5.2rem);font-weight:950;letter-spacing:-.075em;line-height:1;margin:14px 0}.thermo-ui-value span{font-size:.35em;letter-spacing:-.02em}.g-ui .thermo-ui-value{color:#d24a2e}.thermo-ui-buttons{display:flex;justify-content:center;gap:10px}.thermo-ui-buttons i{font-style:normal;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:white;border:1px solid rgba(17,43,64,.08);font-weight:900}.thermo-equals{text-align:center;color:var(--ink-soft)}.thermo-equals span{display:block;font-size:.72rem;text-transform:uppercase;letter-spacing:.11em;font-weight:850}.thermo-equals b{display:block;font-size:2.2rem;color:var(--red)}
.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:9px;margin-top:26px}.step{padding:14px 8px;text-align:center;border-radius:16px;background:linear-gradient(180deg,#fff,#edf4f6);border:1px solid rgba(17,43,64,.07);font-weight:950}.step small{display:block;color:var(--ink-soft);font-weight:700;margin-top:2px}

/* CONVERTER */
.converter-section{background:linear-gradient(180deg,#e6f0f2,#edf5f6)}
.converter{display:grid;grid-template-columns:.72fr 1.28fr;gap:22px}.thermo-panel,.convert-panel{border-radius:30px}.thermo-panel{min-height:490px;display:grid;place-items:center;padding:28px;background:linear-gradient(160deg,#0c2539,#143e5b);color:white}.thermo-panel::before{height:7px}.interactive-thermo{height:410px;width:124px;position:relative}.interactive-tube{position:absolute;left:50%;top:0;bottom:63px;width:38px;transform:translateX(-50%);border:2px solid rgba(255,255,255,.48);background:rgba(255,255,255,.08);border-radius:25px 25px 9px 9px;overflow:hidden}.interactive-tube::after{content:"";position:absolute;left:8px;top:12px;bottom:12px;width:5px;border-radius:999px;background:rgba(255,255,255,.18)}.thermo-fill{position:absolute;bottom:0;left:5px;right:5px;height:52%;border-radius:16px 16px 4px 4px;background:linear-gradient(to top,var(--ice),var(--cyan) 35%,var(--gold) 68%,var(--red));transition:height .2s ease}.interactive-bulb{position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:94px;height:94px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#ffd7ce 0 5%,var(--red) 10%,#c72728 70%);border:3px solid rgba(255,255,255,.45);box-shadow:0 16px 34px rgba(0,0,0,.2)}.thermo-read{position:absolute;left:90px;top:48%;transform:translateY(-50%);font-size:2.1rem;font-weight:950;letter-spacing:-.06em;min-width:150px}.convert-panel{padding:clamp(30px,5vw,50px)}.convert-panel h3{margin:0;font-size:clamp(2.2rem,4vw,3.4rem);letter-spacing:-.045em}.range-wrap{margin:30px 0 26px}.range-wrap input[type=range]{width:100%;accent-color:var(--red)}.range-labels{display:flex;justify-content:space-between;font-size:.76rem;color:var(--ink-soft);font-weight:700}.inputs{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.inputs.four{grid-template-columns:repeat(4,1fr)}.field span{display:block;margin:0 0 7px 5px;font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;font-weight:900;color:var(--ink-soft)}.field input{width:100%;border:1px solid #c4d2d9;border-radius:17px;background:white;padding:15px;font-size:1.18rem;font-weight:900;color:var(--ink);outline:none}.field input:focus{border-color:var(--cyan);box-shadow:0 0 0 4px rgba(56,185,228,.14)}.converter-note{margin-top:18px;padding:16px 18px;border-radius:17px;background:#f1f6f7;color:var(--ink-soft);border:1px solid rgba(17,43,64,.06)}

/* LEARN */
.spectrum-board{margin:-4px 0 30px;padding:25px 28px 62px;border-radius:28px;background:linear-gradient(145deg,#0b2235,#164766);color:white;box-shadow:var(--shadow);position:relative}.spectrum-title{display:flex;justify-content:space-between;align-items:center;font-size:.68rem;letter-spacing:.12em;color:rgba(255,255,255,.58)}.spectrum-title b{color:white;font-size:.73rem}.spectrum-track{position:relative;height:18px;border-radius:999px;margin-top:24px;background:rgba(255,255,255,.12)}.spectrum-fill{position:absolute;inset:0;border-radius:999px;background:var(--spectrum)}.sp{position:absolute;top:30px;transform:translateX(-50%);font-size:.77rem;font-weight:950;color:white;white-space:nowrap}.sp small{display:block;font-weight:600;color:rgba(255,255,255,.56)}.sp0{left:10%}.sp40{left:40%}.sp74{left:63%}.sp100{left:82%}
.climate-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.climate-card{border-radius:25px;padding:26px}.climate-card h3{margin:0;font-size:1.35rem}.climate-card p{margin:6px 0 20px;color:var(--ink-soft)}.climate-track{height:13px;background:#dbe5e8;border-radius:999px;position:relative;overflow:hidden}.climate-fill{position:absolute;top:0;bottom:0;border-radius:999px}.winter{left:8.333%;width:33.333%;background:linear-gradient(90deg,var(--ice),var(--cyan))}.spring{left:25%;width:33.333%;background:linear-gradient(90deg,var(--cyan),var(--green))}.summer{left:50%;width:41.667%;background:linear-gradient(90deg,var(--gold),var(--red))}.climate-scale{display:flex;justify-content:space-between;margin-top:9px;font-size:.72rem;color:var(--ink-soft)}
.quiz{border-radius:24px;padding:30px}.quiz strong{font-size:1.4rem}.answer{display:none;margin-top:16px;padding:12px 14px;border-radius:14px;background:#e8f7ef;color:#167248;font-weight:900}.answer.show{display:block}

/* HISTORY */
.history-band{background:linear-gradient(180deg,#06131f,#0a2235 45%,#0b293f);color:white}.history-band .section-head p{color:rgba(255,255,255,.7)}.history-band .section-head h2::after{background:linear-gradient(90deg,var(--cyan),var(--gold))}.timeline{position:relative;display:grid;gap:18px}.timeline::before{content:"";position:absolute;left:109px;top:28px;bottom:28px;width:2px;background:linear-gradient(180deg,rgba(255,255,255,.05),var(--gold),var(--cyan),rgba(255,255,255,.05))}.event{display:grid;grid-template-columns:90px 1fr;gap:38px;position:relative}.year{text-align:right;padding-top:24px;font-size:1.02rem;font-weight:950;color:var(--gold)}.event-card{position:relative;padding:25px 27px;border-radius:23px;background:rgba(255,255,255,.065);border:1px solid rgba(255,255,255,.12);box-shadow:0 18px 42px rgba(0,0,0,.13);backdrop-filter:blur(8px)}.event-card::before{content:"";position:absolute;left:-45px;top:31px;width:14px;height:14px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 7px #0a2235}.event-card h3{margin:0 0 7px;font-size:1.33rem}.event-card p{margin:0;color:rgba(255,255,255,.72)}.fact{margin-top:16px;padding:16px 18px;border-left:3px solid var(--gold);border-radius:0 15px 15px 0;background:rgba(255,192,92,.08);color:rgba(255,255,255,.86)}.history-letter-badge{position:absolute;left:-4px;top:-5px;width:72px;height:72px;border-radius:24px;background:linear-gradient(145deg,var(--navy),#174765);color:var(--gold);display:grid;place-items:center;font-family:Georgia,serif;font-size:2.8rem;font-weight:700;box-shadow:var(--shadow-sm);transform:rotate(-5deg);z-index:4}.history-letter-badge+.section-head{} .page-history main>section:not(.history-band) .section-head{padding-left:92px}
.source-list{display:grid;gap:10px}.source-list a{display:block;padding:16px 18px;border-radius:16px;background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow-sm);text-decoration:none}.source-list a:hover{text-decoration:underline}

/* WHY / G STORY */
.card .letter{min-height:58px}.page-why-galliera .grid4 .card:nth-child(1)::before{background:var(--red)}.page-why-galliera .grid4 .card:nth-child(2)::before{background:var(--cyan)}.page-why-galliera .grid4 .card:nth-child(3)::before{background:var(--gold)}.page-why-galliera .grid4 .card:nth-child(4)::before{background:var(--purple)}
.faq{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}details{border:1px solid var(--line);border-radius:19px;background:var(--paper);box-shadow:var(--shadow-sm);padding:0 20px}summary{cursor:pointer;font-weight:900;padding:20px 0}details p{margin:-3px 0 20px;color:var(--ink-soft)}

/* SPEC */
.spec-card{position:relative;overflow:hidden;display:grid;grid-template-columns:1.08fr .92fr;gap:42px;align-items:center;padding:clamp(38px,7vw,72px);border-radius:36px;background:linear-gradient(145deg,#06131f,#0c2b43 55%,#154865);color:white;box-shadow:0 28px 80px rgba(7,23,37,.22)}.spec-card::after{content:"";position:absolute;left:0;right:0;bottom:0;height:7px;background:var(--spectrum)}.spec-card h2{margin:8px 0 14px;font-size:clamp(2.5rem,5vw,4.7rem);line-height:.96;letter-spacing:-.055em}.spec-card p{color:rgba(255,255,255,.73)}.spec-meta{display:grid;gap:7px}.spec-meta div{display:flex;justify-content:space-between;gap:20px;padding:11px 0;border-bottom:1px solid rgba(255,255,255,.12)}.spec-meta span:first-child{color:rgba(255,255,255,.53)}.spec-meta strong{text-align:right}.spec-ribbon{position:absolute;right:-55px;top:34px;transform:rotate(38deg);padding:8px 66px;background:var(--gold);color:var(--navy);font-size:.68rem;letter-spacing:.08em;font-weight:950}.citation-box{border-radius:20px;padding:23px;overflow-wrap:anywhere}.citation-box a{color:#176b9a;font-weight:850}

/* LANDMARK PAGES */
.feature-landmark-icon{width:82px;height:82px;padding:17px;border-radius:26px;margin-bottom:18px;background:#eef4f6;color:var(--ice)}.page-74 .feature-landmark-icon{color:var(--green);background:#edf8f2}.page-200 .feature-landmark-icon{color:var(--red);background:#fff0ec}
.page-0 .feature::before{background:linear-gradient(90deg,var(--ice),var(--cyan))}.page-74 .feature::before{background:linear-gradient(90deg,var(--cyan),var(--green))}.page-200 .feature::before{background:linear-gradient(90deg,var(--gold),var(--red))}

/* EXPLORE CARDS */
.nav-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.nav-card{display:flex;flex-direction:column;justify-content:space-between;min-height:250px;padding:28px;border-radius:25px;text-decoration:none;transition:.2s ease}.nav-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.nav-symbol{font-size:3.2rem;font-weight:950;letter-spacing:-.07em;color:var(--red);line-height:1}.nav-card:nth-child(2) .nav-symbol{color:var(--gold)}.nav-card:nth-child(3) .nav-symbol{color:var(--green)}.nav-card:nth-child(4) .nav-symbol{color:var(--ice)}.nav-card h3{font-size:1.42rem;margin:18px 0 8px;letter-spacing:-.02em}.nav-card p{margin:0;color:var(--ink-soft)}.nav-card .arrow{margin-top:22px;font-size:1.7rem;color:var(--red)}

/* TABLE */
.table-wrap{overflow-x:auto}.data-table{width:100%;border-collapse:separate;border-spacing:0 9px;font-variant-numeric:tabular-nums}.data-table th{text-align:left;padding:0 16px 6px;font-size:.74rem;text-transform:uppercase;letter-spacing:.1em;color:var(--ink-soft)}.data-table td{padding:16px;background:rgba(255,253,250,.95);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.data-table td:first-child{border-left:1px solid var(--line);border-radius:14px 0 0 14px}.data-table td:last-child{border-right:1px solid var(--line);border-radius:0 14px 14px 0}.g-val{font-weight:950;color:var(--red);font-size:1.12rem}

/* FOOTER */
footer{position:relative;background:linear-gradient(180deg,#03101b,#061725);color:rgba(255,255,255,.66);padding:48px 0}footer::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--spectrum);opacity:.6}.footer-grid{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:end}.footer-title{color:white;font-size:1.48rem;font-weight:950}.footer-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:15px}.footer-links a{text-decoration:none;color:rgba(255,255,255,.76)}.footer-links a:hover{color:white}

/* MOTION */
@keyframes breathe{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
@keyframes glow{0%,100%{filter:drop-shadow(0 28px 40px rgba(0,0,0,.18))}50%{filter:drop-shadow(0 30px 54px rgba(255,84,61,.12))}}
.hero-scale{animation:glow 5s ease-in-out infinite}.page-hero-art{animation:breathe 6s ease-in-out infinite}

/* TABLET */
@media(max-width:980px){
  .nav-links{display:none}.menu-btn{display:block}
  .nav.open .nav-links{display:flex;position:absolute;left:0;right:0;top:72px;flex-direction:column;align-items:stretch;gap:0;padding:10px 20px 18px;background:#071725;border-bottom:1px solid rgba(255,255,255,.08)}
  .nav.open .nav-links a{padding:13px 4px;border-bottom:1px solid rgba(255,255,255,.06)}
  .hero-grid,.page-hero-layout,.section-head,.converter,.spec-card{grid-template-columns:1fr}
  .hero-grid{padding:88px 0 112px}.hero-copy{max-width:760px}.hero-scale{height:470px;width:290px}
  .page-hero-layout{min-height:auto;padding:68px 0 76px;gap:34px}.page-hero-copy{max-width:800px}.page-hero-art{min-height:320px}
  .anchors{grid-template-columns:1fr}.anchor-strip{margin-top:-34px}.anchor-card p{max-width:none}
  .grid4,.nav-cards{grid-template-columns:repeat(2,1fr)}.grid3,.climate-grid{grid-template-columns:1fr}.inputs.four{grid-template-columns:repeat(2,1fr)}
  .thermostat-pair{transform:none}.page-history main>section:not(.history-band) .section-head{padding-left:0}.history-letter-badge{position:static;margin-bottom:-24px}
}

/* MOBILE */
@media(max-width:640px){
  .wrap{width:min(calc(100% - 28px),var(--max))}
  .nav-inner{min-height:66px}.brand-name{display:none}.nav.open .nav-links{top:66px}
  section{padding:72px 0}.hero-grid{padding:72px 0 86px}.hero-copy h1{font-size:5.45rem}.hero-copy h2{font-size:2rem}.hero-copy p{font-size:1rem}.hero-scale{display:none}
  .page-hero-layout{padding:56px 0 62px;gap:24px}.page-hero h1{font-size:3.4rem}.page-hero p{font-size:1rem}.page-hero-art{min-height:250px;animation:none}
  .thermostat-pair{gap:8px;transform:scale(.82)}.thermostat-screen{width:155px;padding:18px 16px;border-radius:22px}.thermostat-screen strong{font-size:2.5rem}.math-chip{width:52px;height:52px;font-size:1rem}.art-caption{display:none}
  .dial{width:250px;height:250px}.dial::after{height:88px;top:39px;transform-origin:50% 82px}.dial-center strong{font-size:3.6rem}.dial-tags{display:none}
  .learn-scale{width:min(100%,330px);height:250px}.learn-gradient{left:44px;top:26px;bottom:26px}.learn-marker{left:85px}.learn-marker::before{left:-35px;width:26px}.learn-marker b{font-size:1.35rem}.learn-marker.m0{bottom:25px}.learn-marker.m40{bottom:67px}.learn-marker.m74{bottom:102px}.learn-marker.m100{bottom:132px}.learn-marker.m200{top:20px}
  .history-stack{transform:scale(.75);margin:-30px 0}.spec-sheet{width:290px;min-height:310px;padding:20px}.spec-sheet-formula{font-size:2.45rem}.hero-art-landmark .landmark-orbit{width:250px;height:250px}.landmark-orbit strong{font-size:4.1rem}
  .section-head{gap:18px}.section-head h2{font-size:2.65rem}.section-head p{font-size:1rem}.grid2,.grid4,.nav-cards,.faq{grid-template-columns:1fr}
  .thermostat-demo{grid-template-columns:1fr;padding:18px}.thermo-ui{min-height:150px}.thermo-equals b{transform:rotate(90deg);line-height:1}.thermo-equals span{display:none}.thermo-ui-value{font-size:3.5rem}.steps{grid-template-columns:repeat(3,1fr)}
  .inputs,.inputs.four{grid-template-columns:1fr}.thermo-panel{min-height:400px}.interactive-thermo{height:330px}.thermo-read{left:83px;font-size:1.6rem}
  .spectrum-board{padding:22px 18px 58px}.spectrum-title b{display:none}.sp small{display:none}.sp100{left:86%}.sp74{left:64%}
  .timeline::before{left:14px}.event{grid-template-columns:1fr;gap:8px;padding-left:36px}.year{text-align:left;padding:0}.event-card::before{left:-29px;top:28px}.history-letter-badge{margin-bottom:-12px}
  .spec-meta div{display:grid;gap:3px}.spec-meta strong{text-align:left}.spec-ribbon{display:none}
  .data-table{min-width:650px}.footer-grid{grid-template-columns:1fr}.footer-links{justify-content:flex-start}
}
@media(max-width:380px){.thermostat-pair{transform:scale(.72)}.hero-copy h1{font-size:4.8rem}.page-hero h1{font-size:3rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

/* =========================================================
   READABILITY & ACCESSIBILITY PASS — 20 Aug 2026
   Target: comfortable reading for a wide audience at normal
   desktop and mobile viewing distances. Relative units remain
   intact so browser zoom and user accessibility settings work.
   ========================================================= */
html{font-size:112.5%}
body{font-size:1rem;line-height:1.68}
:root{--ink-soft:#36556c}
p,li,td,summary,.source-list a,.citation-box{line-height:1.68}
p{font-size:1rem}

/* General secondary copy: never tiny. */
.eyebrow{font-size:.84rem;letter-spacing:.14em}
.brand-name{font-size:.84rem}
.nav-links{font-size:.96rem}
.breadcrumbs{font-size:.9rem}
.hero-copy p{font-size:clamp(1.08rem,1.15rem + .12vw,1.28rem);line-height:1.62}
.hero-scale-note{font-size:.9rem;line-height:1.5}
.scale-tick{font-size:.94rem}.scale-tick strong{font-size:1.12rem}
.anchor-card p{font-size:1.02rem;line-height:1.6}
.page-hero p{font-size:1.16rem;line-height:1.65;color:rgba(255,255,255,.86)}
.section-head p{font-size:1.14rem;line-height:1.67}
.card p,.nav-card p,.climate-card p,.feature p,.quiz p,.citation-box{font-size:1.03rem}
.number-card .equiv{font-size:1rem}

/* Informational graphics and labels. */
.thermostat-screen span{font-size:.82rem}
.thermostat-screen small{font-size:.94rem}
.art-caption{font-size:.96rem;color:rgba(255,255,255,.8)}
.dial-center span{font-size:.82rem}.dial-center small{font-size:.92rem;color:rgba(255,255,255,.82)}
.dial-tags span{font-size:.86rem}
.learn-marker span{font-size:.94rem;color:rgba(255,255,255,.78)}
.history-scale-card span{font-size:.82rem}.history-scale-card small{font-size:.92rem;color:rgba(255,255,255,.78)}
.spec-sheet-head{font-size:.82rem}.spec-sheet-doi{font-size:.86rem}
.thermo-ui-label{font-size:.84rem}.thermo-equals span{font-size:.84rem}
.step small{font-size:.9rem}
.range-labels{font-size:.9rem}
.field span{font-size:.86rem}
.converter-note{font-size:1.02rem;line-height:1.6}
.spectrum-title{font-size:.82rem}.spectrum-title b{font-size:.86rem}.sp{font-size:.9rem}.sp small{font-size:.82rem}
.climate-scale{font-size:.86rem}
.data-table th{font-size:.86rem}.data-table td{font-size:1rem}
.spec-ribbon{font-size:.8rem}
.footer-note{margin-top:10px;font-size:.94rem;line-height:1.6;max-width:70ch}
.footer-links{font-size:.95rem}

/* Dark-history copy gets stronger contrast and a larger reading size. */
.history-band .section-head p{color:rgba(255,255,255,.84)}
.event-card p{font-size:1rem;color:rgba(255,255,255,.84);line-height:1.68}
.event-card h3{font-size:1.4rem;line-height:1.3}
.fact{font-size:1rem;color:rgba(255,255,255,.94);line-height:1.65}
.year{font-size:1rem;white-space:nowrap}

/* Timeline date collision fix: reserve a proper date lane before the dot. */
.timeline::before{left:132px}
.event{grid-template-columns:116px 1fr;gap:44px}
.event-card::before{left:-53px}

/* Formula notation: distinguish numerical reading relation from unit interval. */
.formula-pill{gap:12px;font-size:1.08rem}
.formula-pill sub,.giant-formula sub{font-size:.55em;line-height:0}
.formula-caption{padding-left:12px;margin-left:3px;border-left:1px solid rgba(255,255,255,.24);font-size:.82rem;font-weight:750;letter-spacing:.04em;color:rgba(255,255,255,.72)}
.formula-help{font-size:1.04rem!important;line-height:1.6}

/* Keep text measures comfortable instead of stretching tiny copy wide. */
.section-head>p,.page-hero-copy>p,.hero-copy>p,.event-card p,.card p,.nav-card p{max-width:68ch}

@media(max-width:980px){
  .nav.open .nav-links{font-size:1rem}
}
@media(max-width:640px){
  html{font-size:112.5%}
  .hero-copy p{font-size:1.08rem}
  .page-hero p{font-size:1.08rem}
  .section-head p{font-size:1.06rem}
  .card p,.nav-card p,.climate-card p,.feature p,.quiz p{font-size:1rem}
  .eyebrow{font-size:.8rem}
  .field span{font-size:.84rem}
  .range-labels{font-size:.84rem}
  .timeline::before{left:14px}
  .event{grid-template-columns:1fr;gap:9px;padding-left:38px}
  .event-card::before{left:-31px}
  .year{font-size:.94rem;text-align:left;padding:0}
  .formula-pill{align-items:center;flex-wrap:wrap}
  .formula-caption{font-size:.78rem}
}


/* =========================================================
   VERSION 1.1 — WHOLE-NUMBER GRANULARITY VISUALS
   21 Aug 2026
   ========================================================= */
.granularity-section{background:linear-gradient(180deg,#f4f0e8,#fbfaf6);position:relative;overflow:hidden}
.granularity-section::before{content:"";position:absolute;right:-140px;top:-120px;width:430px;height:430px;border-radius:50%;background:radial-gradient(circle,rgba(65,184,224,.14),transparent 68%);pointer-events:none}
.granularity-section .section-head p{max-width:760px}
.range-focus{border:1px solid var(--line);border-radius:32px;background:rgba(255,253,250,.94);box-shadow:var(--shadow);overflow:hidden}
.range-focus-copy{padding:26px 30px 20px;display:flex;align-items:baseline;gap:18px;flex-wrap:wrap;border-bottom:1px solid var(--line)}
.range-kicker{font-size:.88rem;font-weight:900;letter-spacing:.12em;color:var(--ink-soft)}
.range-focus-copy strong{font-size:clamp(2rem,4vw,3.3rem);letter-spacing:-.05em;color:var(--navy)}
.range-focus-copy small{font-size:1rem;color:var(--ink-soft)}
.interval-compare{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.interval-card{padding:28px 28px 30px;border-right:1px solid var(--line);position:relative}.interval-card:last-child{border-right:0}
.interval-card.galliera{background:linear-gradient(180deg,#f1fbf5,#fffdf9)}
.interval-top{display:flex;justify-content:space-between;align-items:flex-end;gap:16px}.interval-top span{font-size:1.12rem;font-weight:900}.interval-top b{font-size:clamp(3.4rem,6vw,5.5rem);line-height:.85;letter-spacing:-.07em;color:var(--navy)}
.interval-card.galliera .interval-top b{color:var(--green)}.interval-card.fahrenheit .interval-top b{color:var(--gold-deep)}.interval-card.celsius .interval-top b{color:var(--ice)}
.interval-card p{margin:8px 0 22px;color:var(--ink-soft);font-weight:750}
.interval-ruler{height:52px;border-radius:14px;background-color:#e9eff2;background-image:repeating-linear-gradient(90deg,rgba(11,49,75,.30) 0 1px,transparent 1px calc(100% / var(--ticks)));border:1px solid rgba(11,49,75,.08);position:relative;overflow:hidden}
.interval-ruler::after{content:"";position:absolute;left:0;right:0;bottom:0;height:8px;background:linear-gradient(90deg,var(--ice),var(--cyan));opacity:.9}.fahrenheit .interval-ruler::after{background:linear-gradient(90deg,var(--gold),var(--red))}.galliera .interval-ruler::after{background:linear-gradient(90deg,var(--cyan),var(--green))}
.interval-endpoints{display:flex;justify-content:space-between;margin-top:9px;font-weight:850;color:var(--ink-soft)}
.interval-badge{margin-top:18px;padding:10px 12px;border-radius:14px;background:#e6f5ed;color:#17724a;font-weight:900;font-size:.92rem;text-align:center}
.granularity-footer{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:16px}.granularity-footer>div{padding:20px 22px;border-radius:20px;background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow-sm)}.granularity-footer b,.granularity-footer span{display:block}.granularity-footer b{font-size:1.08rem}.granularity-footer span{margin-top:6px;color:var(--ink-soft)}.granularity-footer strong{color:var(--green)}
.precision-note{margin:18px 0 0;padding:16px 18px;border-left:4px solid var(--cyan);border-radius:0 16px 16px 0;background:rgba(65,184,224,.08);color:var(--ink-soft)}
.precision-note.dark{color:rgba(255,255,255,.78);background:rgba(65,184,224,.09)}
.section-dark.granularity-section{background:linear-gradient(160deg,#071725,#0c2b42 58%,#143c57);color:white}.section-dark.granularity-section .section-head p{color:rgba(255,255,255,.78)}.section-dark.granularity-section .eyebrow{color:var(--gold)}
.unit-size-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:18px}.unit-size-row article{padding:24px;border-radius:22px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12)}.unit-size-row span,.unit-size-row strong,.unit-size-row small{display:block}.unit-size-row span{color:rgba(255,255,255,.72);font-weight:850}.unit-size-row strong{font-size:clamp(2rem,4vw,3.4rem);letter-spacing:-.04em;margin:5px 0}.unit-size-row small{font-size:.94rem;color:rgba(255,255,255,.62)}.unit-size-row .featured{background:linear-gradient(145deg,rgba(52,183,119,.20),rgba(255,255,255,.08));border-color:rgba(52,183,119,.34)}.unit-size-row .featured strong{color:#8de0b3}
.comparison-matrix{border-radius:24px;overflow:hidden;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.05)}.comparison-head,.comparison-row{display:grid;grid-template-columns:1.55fr repeat(3,.72fr);align-items:stretch}.comparison-head{background:rgba(255,255,255,.09);font-weight:900;color:rgba(255,255,255,.84)}.comparison-head span,.comparison-row>b,.comparison-row>span{padding:16px 18px;border-right:1px solid rgba(255,255,255,.10)}.comparison-head span:last-child,.comparison-row>span:last-child{border-right:0}.comparison-row{border-top:1px solid rgba(255,255,255,.10)}.comparison-row>b{font-size:1rem}.comparison-row b small{display:block;margin-top:2px;font-size:.88rem;color:rgba(255,255,255,.56);font-weight:700}.comparison-row>span{display:grid;place-items:center;font-size:clamp(2rem,4vw,3.25rem);font-weight:950;letter-spacing:-.05em}.comparison-row .gwin{color:#8de0b3;background:rgba(52,183,119,.11)}
.comparison-caption{margin-top:14px;color:rgba(255,255,255,.68);font-size:.96rem}
.benefit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}.benefit-grid article{padding:24px;border-radius:22px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12)}.benefit-grid h3{margin:6px 0 8px;font-size:1.3rem}.benefit-grid p{color:rgba(255,255,255,.72);margin:0}.benefit-number{font-size:2.6rem;font-weight:950;color:var(--gold);letter-spacing:-.05em}
.learn-step-visual{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.learn-step-visual>div{padding:26px;border-radius:24px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);text-align:center}.learn-step-visual span,.learn-step-visual strong,.learn-step-visual small{display:block}.learn-step-visual span{font-weight:900;color:rgba(255,255,255,.75)}.learn-step-visual strong{font-size:clamp(4rem,8vw,6.5rem);line-height:1;margin:10px 0;color:white;letter-spacing:-.07em}.learn-step-visual small{font-size:1rem;color:rgba(255,255,255,.64)}.learn-step-visual .featured{background:linear-gradient(145deg,rgba(52,183,119,.23),rgba(255,255,255,.08));border-color:rgba(52,183,119,.32)}.learn-step-visual .featured strong{color:#8de0b3}
.math-inline{white-space:nowrap;font-weight:850}
.spec-meta a{color:white;text-decoration:underline;text-decoration-color:rgba(255,255,255,.35);text-underline-offset:3px}
@media(max-width:900px){.interval-compare,.unit-size-row,.benefit-grid,.learn-step-visual{grid-template-columns:1fr}.interval-card{border-right:0;border-bottom:1px solid var(--line)}.interval-card:last-child{border-bottom:0}.granularity-footer{grid-template-columns:1fr}.comparison-head,.comparison-row{grid-template-columns:1.35fr repeat(3,.65fr)}.comparison-head span,.comparison-row>b,.comparison-row>span{padding:14px 10px}.comparison-row>span{font-size:2rem}}
@media(max-width:640px){.range-focus-copy{padding:22px 20px 16px;display:block}.range-focus-copy strong,.range-focus-copy small{display:block}.range-focus-copy strong{margin:4px 0}.interval-card{padding:24px 20px}.interval-top span{font-size:1.08rem}.comparison-matrix{overflow-x:auto}.comparison-head,.comparison-row{min-width:610px}.comparison-caption{font-size:1rem}.benefit-grid article{padding:22px}.granularity-section .section-head h2{font-size:2.55rem}}

/* Formula legibility: explicit subscripts in T_G and T_C notation. */
sub{font-size:.68em;line-height:0;vertical-align:-.26em}
.formula-pill sub,.giant-formula sub,.spec-sheet-formula sub,.math-inline sub,.footer-note sub,.formula-help sub{font-size:.62em;vertical-align:-.28em}

/* Keep explanatory microcopy comfortably readable. */
.range-kicker{font-size:.94rem}
.interval-badge{font-size:1rem}
.unit-size-row small,.comparison-row b small,.comparison-caption,.learn-step-visual small{font-size:1rem}
/* Force equation subscripts to render below the baseline consistently. */
.formula-pill sub,.giant-formula sub,.spec-sheet-formula sub,.math-inline sub,.footer-note sub,.formula-help sub,.spec-card sub{position:relative;top:.34em;vertical-align:baseline;font-size:.62em;line-height:0}
.eq-sub{display:inline-block;font-size:.62em;line-height:1;transform:translateY(.30em);margin-left:.02em;margin-right:.01em}
.eq-sub{transform:none!important;vertical-align:-.38em!important;position:static!important}
.eq-var{display:inline-block;position:relative;padding-right:.38em;line-height:1;white-space:nowrap}
.eq-var>span{position:absolute;right:0;bottom:-.22em;font-size:.52em;line-height:1;font-weight:inherit}


/* =========================================================
   FINAL TIMELINE ALIGNMENT — 21 Aug 2026
   Keep date labels fully clear of the timeline markers.
   ========================================================= */
@media (min-width: 901px){
  .page-history .timeline::before{left:176px}
  .page-history .event{grid-template-columns:148px minmax(0,1fr);gap:60px}
  .page-history .year{padding-top:24px;padding-right:0;text-align:right;white-space:nowrap;overflow:visible}
  .page-history .event-card::before{left:-39px}
}
@media (min-width:641px) and (max-width:900px){
  .page-history .timeline::before{left:146px}
  .page-history .event{grid-template-columns:122px minmax(0,1fr);gap:48px}
  .page-history .year{padding-top:24px;padding-right:0;text-align:right;white-space:nowrap;overflow:visible;font-size:.96rem}
  .page-history .event-card::before{left:-31px}
}

/* Final visual QA: give timeline dates a generous clear lane. */
@media (min-width: 901px){
  .page-history .timeline::before{left:194px}
  .page-history .event{grid-template-columns:144px minmax(0,1fr);gap:88px}
  .page-history .event-card::before{left:-45px}
}
@media (min-width:641px) and (max-width:900px){
  .page-history .timeline::before{left:147px}
  .page-history .event{grid-template-columns:110px minmax(0,1fr);gap:70px}
  .page-history .event-card::before{left:-40px}
}

/* Timeline QA v3: visibly separate labels from markers at every non-mobile width. */
@media (min-width: 901px){
  .page-history .timeline::before{left:225px}
  .page-history .event{grid-template-columns:150px minmax(0,1fr);gap:130px}
  .page-history .event-card::before{left:-62px}
}
@media (min-width:641px) and (max-width:900px){
  .page-history .timeline::before{left:160px}
  .page-history .event{grid-template-columns:110px minmax(0,1fr);gap:90px}
  .page-history .event-card::before{left:-47px}
}