/* The Brown Gene — shared styles (homepage + /handbook/).
   Brand tokens from existing TBG assets: ink, terracotta→orange gradient, helix mark, Space Grotesk / Plus Jakarta Sans / JetBrains Mono.
   Provisional: Instrument Serif as the editorial display voice, warm paper + espresso neutrals. */
:root{
  --esp:#16110F; --esp-2:#211915; --esp-3:#2C201A;
  --paper:#F3ECE3; --paper-2:#E8DDD0; --line:#D9CBBB;
  --cream:#FAF6F1; --ink:#1C1917; --ink-soft:#4A403A; --mute:#8A7E76;
  --terra:#C2410C; --orange:#FB923C; --peach:#FDBA74; --saffron:#F5A524;
  --grad:linear-gradient(135deg,#C2410C,#FB923C);
  --serif:'Instrument Serif',Georgia,'Times New Roman',serif;
  --sans:'Plus Jakarta Sans',system-ui,sans-serif;
  --grot:'Space Grotesk',system-ui,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;
  --pad:clamp(20px,4.6vw,72px); --max:1320px;
  --ease:cubic-bezier(.16,1,.3,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html.lenis,html.lenis body{height:auto}
body{background:var(--esp);color:var(--cream);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden;text-rendering:optimizeLegibility}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
em{font-family:var(--serif);font-style:italic;font-weight:400}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.skip{position:absolute;left:-999px;top:10px;z-index:200;background:var(--cream);color:var(--ink);padding:8px 14px;border-radius:8px}
.skip:focus{left:10px}
::selection{background:var(--peach);color:var(--ink)}
:focus-visible{outline:2px solid var(--orange);outline-offset:3px}
/* static grain, baked into body (no animated blend layer) */
body:before{content:"";position:fixed;inset:0;z-index:90;pointer-events:none;opacity:.07;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .9 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

/* ---------- type scale ---------- */
.d-xl,.d-l{font-family:var(--serif);font-weight:400;letter-spacing:-.02em;line-height:.98}
.d-xl{font-size:clamp(52px,7.2vw,118px)}
.d-l{font-size:clamp(40px,5vw,80px)}
.d-xl em,.d-l em{color:var(--orange)}
.paper .d-xl em,.paper .d-l em{color:var(--terra)}
.lead{font-size:clamp(18px,1.45vw,21px);line-height:1.5;font-weight:500}
.kicker{font-family:var(--grot);font-weight:500;font-size:14px;letter-spacing:.02em;color:rgba(250,246,241,.75);display:flex;align-items:center;gap:10px}
.kicker .dot{width:7px;height:7px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 4px rgba(251,146,60,.18)}
.sec-mark{font-family:var(--grot);font-weight:500;font-size:14px;color:var(--terra);display:flex;gap:10px;margin-bottom:28px}
.sec-mark span{font-family:var(--mono);font-size:12px;padding-top:2px;opacity:.8}
.sec-mark.light{color:var(--peach)}
.paper{background:var(--paper);color:var(--ink)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;font:700 15.5px/1 var(--sans);padding:17px 26px;border-radius:999px;border:0;cursor:pointer;transition:transform .5s var(--ease),box-shadow .4s,background .3s;white-space:nowrap}
.btn-solid{background:var(--grad);color:var(--esp);box-shadow:0 12px 30px -12px rgba(251,146,60,.8)}
.btn-solid:hover{transform:translateY(-2px);box-shadow:0 18px 40px -12px rgba(251,146,60,1)}
.btn-dark{background:var(--ink);color:var(--cream)}
.btn-dark:hover{background:var(--terra)}
.btn-sm{padding:12px 18px;font-size:14px}
.btn-lg{padding:20px 30px;font-size:16.5px}
.btn-block{width:100%}
.btn .arr{display:inline-block;transition:transform .5s var(--ease)}
.btn:hover .arr{transform:translateX(5px)}
.tlink{font-weight:600;font-size:15.5px;color:rgba(250,246,241,.8);border-bottom:1px solid rgba(250,246,241,.3);padding-bottom:3px;transition:color .3s,border-color .3s}
.tlink:hover{color:var(--peach);border-color:var(--peach)}

/* ---------- nav ---------- */
.nav{position:fixed;inset:0 0 auto 0;z-index:60;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:20px var(--pad);transition:background .4s,padding .4s,border-color .4s;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(22,17,15,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);padding-top:12px;padding-bottom:12px;border-color:rgba(250,246,241,.07)}
.nav .btn{justify-self:end}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--grot);font-weight:600;font-size:18px;letter-spacing:-.02em}
.brand img{border-radius:22%}
.nav-links{display:flex;gap:6px;padding:5px;border-radius:999px;background:rgba(250,246,241,.05);border:1px solid rgba(250,246,241,.08)}
.nav-links a{font-size:14px;font-weight:600;padding:8px 16px;border-radius:999px;color:rgba(250,246,241,.75);transition:background .3s,color .3s}
.nav-links a:hover,.nav-links a[aria-current]{background:rgba(250,246,241,.09);color:var(--cream)}

/* ---------- hero (home) ---------- */
.hero{position:relative;min-height:100vh;min-height:100svh;padding:130px var(--pad) 0;display:flex;flex-direction:column;overflow:hidden;isolation:isolate}
.hero-bg{position:absolute;inset:0;z-index:-2;background:
  radial-gradient(55% 65% at 78% 40%,rgba(194,65,12,.42),transparent 70%),
  radial-gradient(40% 40% at 70% 95%,rgba(245,165,36,.12),transparent 70%),
  linear-gradient(180deg,#1B1411,#16110F)}
.helix{position:absolute;z-index:-1;right:12%;top:-5%;height:115%;width:auto;aspect-ratio:400/1400;opacity:.32}
svg[data-helix] path{fill:none;stroke-linecap:round}
.hero-grid{flex:1;display:grid;grid-template-columns:repeat(12,1fr);column-gap:24px;align-items:center;max-width:var(--max);width:100%;margin:0 auto}
.hero-copy{grid-column:1/9;position:relative;z-index:2}
.hero-title{font-family:var(--serif);font-weight:400;font-size:clamp(50px,6.3vw,104px);line-height:.94;letter-spacing:-.025em;margin:26px 0 40px}
.hero-title .ln{display:block;overflow:hidden;padding-bottom:.14em;margin-bottom:-.12em}
.hero-title .w{display:inline-block}
.hero-title .it{font-style:italic;color:rgba(250,246,241,.92)}
.hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;padding-right:.06em}
.hero-foot{display:grid;grid-template-columns:minmax(0,30em) auto;gap:40px;align-items:end}
.hero-sub{font-size:clamp(16.5px,1.25vw,19px);color:rgba(250,246,241,.74);line-height:1.55}
.hero-ctas{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.hero-visual{grid-column:9/13;position:relative;align-self:center;width:100%;height:clamp(560px,74vh,760px)}
.hv-glow{position:absolute;left:50%;top:50%;width:150%;aspect-ratio:1;transform:translate(-50%,-50%);border-radius:50%;background:radial-gradient(closest-side,rgba(251,146,60,.30),rgba(194,65,12,.14) 45%,transparent 72%);pointer-events:none}
.hv-helix{position:absolute;left:50%;top:0;height:100%;width:auto;aspect-ratio:400/1400;transform:translateX(-50%);opacity:.8}
.chip{position:absolute;display:grid;grid-template-columns:auto 1fr;column-gap:10px;align-items:center;padding:11px 16px 11px 12px;border-radius:14px;background:rgba(22,17,15,.72);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(250,246,241,.12);font-family:var(--grot);font-weight:600;font-size:13.5px;box-shadow:0 20px 40px -20px rgba(0,0,0,.7);white-space:nowrap}
.chip i{grid-row:span 2;width:8px;height:8px;border-radius:50%;background:var(--orange)}
.chip b{font-family:var(--mono);font-weight:500;font-size:11px;color:var(--peach);letter-spacing:.02em}
.chip-a{left:-16%;top:17%}.chip-b{right:-6%;top:47%}.chip-c{left:-8%;bottom:15%}
.hero-rule{max-width:var(--max);width:100%;margin:56px auto 0;display:flex;justify-content:space-between;padding:20px 0 26px;border-top:1px solid rgba(250,246,241,.1);font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:rgba(250,246,241,.45)}
.cue:after{content:" ↓";color:var(--orange)}

/* ---------- tension ---------- */
.tension{position:relative}
.tension-pin{min-height:100vh;display:flex;flex-direction:column;justify-content:center;padding:120px var(--pad);max-width:calc(var(--max) + 2*var(--pad));margin:0 auto}
.tension-text{font-family:var(--serif);font-size:clamp(38px,5.2vw,84px);line-height:1.06;letter-spacing:-.02em;max-width:16.5em;color:var(--ink)}
.tension-text em{color:var(--terra)}
.tension-text .sw{transition:none}

/* ---------- story (pinned horizontal) ---------- */
.story{background:var(--esp);overflow:hidden;position:relative}
.story-pin{height:100vh;display:flex;flex-direction:column;justify-content:center;position:relative}
.story-head{position:absolute;top:100px;left:var(--pad);right:var(--pad);display:flex;justify-content:space-between;align-items:center}
.story-head .sec-mark{margin:0}
.story-progress{width:min(260px,28vw);height:2px;background:rgba(250,246,241,.12);overflow:hidden;border-radius:2px}
.story-progress i{display:block;height:100%;background:var(--grad);transform-origin:left;transform:scaleX(0)}
.story-track{display:flex;gap:28px;padding:40px var(--pad) 0;width:max-content;align-items:stretch;will-change:transform}
.panel{width:min(480px,82vw);min-height:min(60vh,540px);padding:40px 38px;border-radius:26px;display:flex;flex-direction:column;position:relative;background:var(--esp-2);border:1px solid rgba(250,246,241,.08)}
.panel-intro{width:min(720px,86vw);background:none;border:0;padding-left:0;justify-content:center}
.panel-intro p{color:rgba(250,246,241,.6);font-size:19px;margin-top:24px;max-width:24em}
.panel:nth-child(3){background:linear-gradient(165deg,#C2410C,#7A2C10)}
.panel-last{background:var(--paper)!important;color:var(--ink)}
.p-n{font-family:var(--serif);font-style:italic;font-size:30px;color:var(--peach);line-height:1}
.panel-last .p-n{color:var(--terra)}
.panel h3{font-family:var(--serif);font-weight:400;font-size:clamp(38px,3.4vw,56px);line-height:1;letter-spacing:-.02em;margin:auto 0 18px}
.panel h3 em{color:var(--peach)}
.panel-last h3 em{color:var(--terra)}
.panel p{font-size:16px;opacity:.82;max-width:27em}
.range{margin-top:28px;font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase}
.range>span{display:inline-block;padding:7px 12px;border-radius:999px;border:1px dashed rgba(250,246,241,.3);opacity:.75}
.zones{display:grid;grid-template-columns:1fr 1.6fr 1fr;margin-bottom:10px;opacity:.85}
.zones b{font-weight:500}.zones b:nth-child(2){text-align:center}.zones b:nth-child(3){text-align:right}
.track{height:8px;border-radius:8px;position:relative;background:linear-gradient(90deg,rgba(250,246,241,.25) 0 24%,rgba(250,246,241,.5) 24% 76%,var(--peach) 76%)}
.mk{position:absolute;top:50%;left:30%;width:18px;height:18px;margin:-9px 0 0 -9px;border-radius:50%;background:var(--cream);box-shadow:0 0 0 5px rgba(250,246,241,.25)}
.habits{list-style:none;margin-top:26px;display:flex;flex-wrap:wrap;gap:8px}
.habits li{font-family:var(--grot);font-size:13px;font-weight:500;padding:7px 12px;border-radius:999px;background:rgba(250,246,241,.08);border:1px solid rgba(250,246,241,.12)}
.curve{margin-top:24px;width:100%;height:90px}
.curve path{fill:none;stroke:var(--terra);stroke-width:3;stroke-linecap:round}

/* ---------- founder ---------- */
.founder{padding:clamp(110px,12vw,180px) var(--pad)}
.founder-grid{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:repeat(12,1fr);column-gap:24px;row-gap:40px}
.founder-grid>.sec-mark{grid-column:1/-1;margin:0}
.founder-quote{grid-column:1/11;font-family:var(--serif);font-size:clamp(40px,5.4vw,86px);line-height:1;letter-spacing:-.02em}
.founder-quote em{color:var(--terra)}
.founder-photo{grid-column:1/5}
.ph{aspect-ratio:4/5;border-radius:18px;display:flex;align-items:flex-end;padding:22px;background:linear-gradient(160deg,var(--paper-2),#D4C2AE);border:1px dashed #BFAA93;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:#7C6B5C}
.founder-copy{grid-column:6/12;align-self:end;display:grid;gap:20px}
.founder-copy p:not(.lead):not(.sig){color:var(--ink-soft);max-width:34em}
.sig{font-family:var(--serif);font-size:30px;font-style:italic;margin-top:8px;display:flex;flex-direction:column;line-height:1.1}
.sig span{font-family:var(--grot);font-style:normal;font-size:13px;color:var(--mute);margin-top:6px}

/* ---------- handbook teaser ---------- */
.hb-teaser{position:relative;overflow:hidden;padding:clamp(110px,12vw,180px) var(--pad);background:linear-gradient(180deg,#1B1411,#16110F)}
.hbt-glow{position:absolute;inset:-10% -10% -10% 30%;background:radial-gradient(45% 50% at 60% 50%,rgba(194,65,12,.5),transparent 70%);pointer-events:none}
.hbt-grid{position:relative;max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:repeat(12,1fr);column-gap:24px;align-items:center}
.hbt-copy{grid-column:1/7}
.hbt-copy .d-xl{margin-bottom:24px}
.hbt-copy .lead{color:rgba(250,246,241,.8);max-width:27em}
.hbt-list{list-style:none;margin:36px 0 40px;border-top:1px solid rgba(250,246,241,.12)}
.hbt-list li{display:flex;gap:18px;padding:15px 0;border-bottom:1px solid rgba(250,246,241,.12);font-weight:500;color:rgba(250,246,241,.86)}
.hbt-list span{font-family:var(--mono);font-size:12px;color:var(--orange);padding-top:4px}
.hbt-cta{display:flex;align-items:center;gap:26px;flex-wrap:wrap}
.price-inline{font-size:15px;color:rgba(250,246,241,.7);display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.price-inline b{font-family:var(--grot);font-size:26px;color:var(--cream);letter-spacing:-.02em}
.price-inline s{opacity:.55}
.price-inline small{flex-basis:100%;font-size:13px;opacity:.7}
.hbt-grid .book-stage{grid-column:8/13}

/* ---------- 3D book ---------- */
.book-stage{perspective:1600px;display:flex;flex-direction:column;align-items:center;padding:20px 0}
.book{--w:min(340px,64vw);--h:calc(var(--w)*1.36);--d:40px;width:var(--w);height:var(--h);position:relative;transform-style:preserve-3d;transform:rotateY(-26deg) rotateX(6deg);transition:transform .6s var(--ease)}
.book>div{position:absolute;inset:0}
.book-front{border-radius:3px 12px 12px 3px;transform:translateZ(calc(var(--d)/2));padding:30px 28px;display:flex;flex-direction:column;overflow:hidden;
  background:radial-gradient(90% 55% at 70% 100%,rgba(251,146,60,.6),transparent 65%),linear-gradient(160deg,#2C201A,#16110F 60%,#5A220C);
  box-shadow:inset 5px 0 8px -3px rgba(0,0,0,.6),inset -1px 0 0 rgba(255,255,255,.08)}
.book-front:after{content:"";position:absolute;inset:0;background:linear-gradient(105deg,transparent 40%,rgba(255,255,255,.13) 50%,transparent 60%);transform:translateX(var(--shine,-70%));transition:transform .6s var(--ease)}
.bf-top{display:flex;align-items:center;gap:9px;font-family:var(--grot);font-weight:600;font-size:13px;position:relative;z-index:1}
.bf-top img{width:24px;border-radius:22%}
.bf-helix{position:absolute;right:-8%;top:-10%;height:85%;width:auto;aspect-ratio:400/1400;opacity:.45;transform:rotate(12deg)}
.bf-title{margin-top:auto;position:relative;z-index:1}
.bf-title small{font-family:var(--mono);font-size:10px;letter-spacing:.3em;text-transform:uppercase;color:var(--orange)}
.bf-title strong{display:block;font-family:var(--serif);font-weight:400;font-size:calc(var(--w)*.15);line-height:.92;letter-spacing:-.02em;margin:6px 0 2px}
.bf-title em{font-size:calc(var(--w)*.12);color:var(--peach)}
.bf-foot{margin-top:20px;padding-top:12px;border-top:1px solid rgba(250,246,241,.15);font-family:var(--mono);font-size:9.5px;letter-spacing:.18em;text-transform:uppercase;opacity:.6;position:relative;z-index:1}
.book-spine{width:var(--d)!important;transform:translateX(calc(var(--d)/-2)) rotateY(-90deg);background:linear-gradient(90deg,#0E0A09,#2C201A);display:flex;align-items:center;justify-content:center}
.book-spine span{writing-mode:vertical-rl;transform:rotate(180deg);font-family:var(--mono);font-size:9px;letter-spacing:.22em;text-transform:uppercase;color:var(--orange);white-space:nowrap}
.book-pages{left:auto!important;right:0;width:var(--d)!important;top:5px!important;bottom:5px!important;transform:translateX(calc(var(--d)/2)) rotateY(90deg);background:repeating-linear-gradient(90deg,#F3ECE3 0 2px,#DCCFBF 2px 3px)}
.book-back{transform:translateZ(calc(var(--d)/-2));background:#0E0A09;border-radius:12px 3px 3px 12px}
.book-shadow{width:70%;max-width:300px;height:36px;margin-top:36px;background:radial-gradient(closest-side,rgba(0,0,0,.65),transparent);filter:blur(6px)}
.mock-note{margin-top:8px;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:rgba(250,246,241,.35)}

/* ---------- letter ---------- */
.letter{padding:clamp(100px,11vw,160px) var(--pad)}
.letter-grid{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:repeat(12,1fr);column-gap:24px;align-items:end}
.letter-grid>div:first-child{grid-column:1/7}
.letter-side{grid-column:8/13;display:grid;gap:22px;color:var(--ink-soft)}
.ss-form{display:flex;gap:8px;padding:6px;border-radius:999px;background:var(--cream);border:1px solid var(--line)}
.ss-form input{flex:1;min-width:0;border:0;outline:0;background:transparent;font:500 16px var(--sans);padding:0 16px;color:var(--ink)}
.socials{display:flex;gap:22px;flex-wrap:wrap;font-family:var(--grot);font-weight:600;font-size:15px;color:var(--ink)}
.socials a{border-bottom:1px solid var(--line);padding-bottom:2px;transition:color .3s,border-color .3s}
.socials a:hover{color:var(--terra);border-color:var(--terra)}

/* ---------- footer ---------- */
.footer{padding:90px var(--pad) 36px;background:var(--esp);overflow:hidden}
.footer-big{max-width:var(--max);margin:0 auto 70px;font-family:var(--serif);font-size:clamp(56px,10vw,170px);line-height:.9;letter-spacing:-.03em;color:rgba(250,246,241,.92)}
.footer-big em{color:var(--orange)}
.footer-row{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:auto 1fr auto;gap:40px;padding-top:28px;border-top:1px solid rgba(250,246,241,.1);align-items:start}
.disclaimer{font-size:13px;color:rgba(250,246,241,.58);max-width:60em}
.disclaimer strong{color:var(--peach)}
.copy{font-size:13px;color:rgba(250,246,241,.42)}

/* ================= HANDBOOK PAGE ================= */
.wrap{max-width:var(--max);margin:0 auto}
.hb-hero{position:relative;min-height:100vh;min-height:100svh;padding:120px var(--pad) 60px;display:flex;align-items:center;overflow:hidden;isolation:isolate}
.hbh-grid{max-width:var(--max);width:100%;margin:0 auto;display:grid;grid-template-columns:repeat(12,1fr);column-gap:24px;align-items:center}
.hbh-copy{grid-column:1/8}
.hbh-title{font-family:var(--serif);font-weight:400;font-size:clamp(60px,9vw,150px);line-height:.9;letter-spacing:-.03em;margin:24px 0 34px}
.hbh-title .ln{display:block;overflow:hidden;padding:0 .08em .16em 0;margin-bottom:-.12em}
.hbh-title .w{display:inline-block}
.hbh-title .it{font-style:italic}
.hb-hero .hero-sub{max-width:31em;margin-bottom:40px}
.buy-row{display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.book-stage-hero{grid-column:8/13}
.book-stage-hero .book{--w:min(360px,62vw)}

.who{padding:clamp(100px,11vw,170px) var(--pad)}
.who .d-l{max-width:15em;margin-bottom:60px}
.who-grid{display:grid;grid-template-columns:repeat(12,1fr);column-gap:24px}
.who-yes{grid-column:1/8;list-style:none;border-top:1px solid var(--line)}
.who-yes li{position:relative;padding:22px 0 22px 44px;border-bottom:1px solid var(--line);font-size:clamp(18px,1.5vw,22px);font-weight:500;line-height:1.4}
.who-yes li:before{content:"";position:absolute;left:4px;top:30px;width:18px;height:10px;border-left:2px solid var(--terra);border-bottom:2px solid var(--terra);transform:rotate(-45deg)}
.who-no{grid-column:9/13;align-self:start;padding:28px;border-radius:18px;background:var(--paper-2);color:var(--ink-soft)}
.who-no .label{font-family:var(--serif);font-style:italic;font-size:30px;color:var(--ink);margin-bottom:8px;line-height:1}

.inside{padding:clamp(100px,11vw,170px) var(--pad);background:var(--esp)}
.inside .d-l{margin-bottom:60px}
.parts{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.part{padding:30px 26px 34px;border-radius:22px;background:var(--esp-2);border:1px solid rgba(250,246,241,.08);min-height:300px;display:flex;flex-direction:column;transition:transform .6s var(--ease),border-color .4s}
.part:hover{transform:translateY(-6px);border-color:rgba(251,146,60,.4)}
.part:nth-child(3){background:linear-gradient(165deg,#C2410C,#7A2C10)}
.part-n{font-family:var(--mono);font-size:12px;color:var(--peach)}
.part h3{font-family:var(--serif);font-weight:400;font-size:34px;line-height:1;margin:auto 0 14px;letter-spacing:-.01em}
.part p{font-size:15px;opacity:.78}
.contents{margin-top:90px;display:grid;grid-template-columns:repeat(12,1fr);column-gap:24px}
.contents-head{grid-column:1/5}
.contents-head h3{font-family:var(--serif);font-weight:400;font-size:44px;line-height:1}
.contents-head p{margin-top:10px;font-size:14px;color:rgba(250,246,241,.5)}
.toc{grid-column:5/13;list-style:none;counter-reset:toc;border-top:1px solid rgba(250,246,241,.12)}
.toc li{counter-increment:toc;display:grid;grid-template-columns:52px 1fr auto;align-items:baseline;padding:16px 0;border-bottom:1px solid rgba(250,246,241,.12);transition:padding .5s var(--ease),color .3s}
.toc li:before{content:counter(toc,decimal-leading-zero);font-family:var(--mono);font-size:12px;color:var(--orange)}
.toc span{font-size:18px;font-weight:500}
.toc i{font-style:normal;font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:rgba(250,246,241,.45)}
.toc li:hover{padding-left:10px;color:var(--peach)}

.author{padding:clamp(100px,11vw,170px) var(--pad)}
.author-grid{display:grid;grid-template-columns:repeat(12,1fr);column-gap:24px;align-items:center}
.author-grid .founder-photo{grid-column:1/5}
.author-grid>div{grid-column:6/12;display:grid;gap:20px}
.author-grid .sec-mark{margin:0}
.author-grid p:not(.lead):not(.sec-mark){color:var(--ink-soft);max-width:34em}

.pricing{position:relative;overflow:hidden;padding:clamp(100px,11vw,170px) var(--pad);background:var(--esp);display:flex;justify-content:center}
.pricing .hbt-glow{inset:0}
.price-card{position:relative;width:min(560px,100%);padding:clamp(30px,4vw,52px);border-radius:30px;background:rgba(33,25,21,.85);border:1px solid rgba(251,146,60,.28);box-shadow:0 50px 100px -40px rgba(0,0,0,.8);backdrop-filter:blur(10px)}
.pc-price{display:flex;align-items:baseline;gap:14px}
.pc-price b{font-family:var(--serif);font-weight:400;font-size:clamp(72px,8vw,104px);line-height:.9;letter-spacing:-.03em}
.pc-price s{font-size:22px;opacity:.45}
.pc-sub{margin:10px 0 28px;color:rgba(250,246,241,.65)}
.pc-list{list-style:none;margin-bottom:32px;border-top:1px solid rgba(250,246,241,.1)}
.pc-list li{padding:13px 0 13px 30px;border-bottom:1px solid rgba(250,246,241,.1);position:relative;font-weight:500}
.pc-list li:before{content:"";position:absolute;left:2px;top:19px;width:12px;height:7px;border-left:2px solid var(--orange);border-bottom:2px solid var(--orange);transform:rotate(-45deg)}
.pc-note{margin-top:14px;text-align:center;font-size:13px;color:rgba(250,246,241,.45)}

.faq{padding:clamp(100px,11vw,170px) var(--pad)}
.faq-grid{display:grid;grid-template-columns:repeat(12,1fr);column-gap:24px}
.faq-grid>div:first-child{grid-column:1/5}
.faq-list{grid-column:6/13;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:24px 40px 24px 0;font-family:var(--grot);font-weight:600;font-size:clamp(18px,1.5vw,21px);position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";position:absolute;right:4px;top:18px;font-family:var(--serif);font-size:34px;color:var(--terra);transition:transform .4s var(--ease)}
.faq details[open] summary:after{transform:rotate(45deg)}
.faq details p{padding:0 40px 24px 0;color:var(--ink-soft)}
.ph-text{display:inline-block;margin-top:4px;padding:2px 8px;border-radius:6px;background:#F7D9BE;color:#7A2C10;font-size:14px}

.sticky-buy{position:fixed;left:50%;bottom:18px;z-index:55;display:flex;align-items:center;gap:16px;padding:8px 8px 8px 20px;border-radius:999px;background:rgba(22,17,15,.85);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(250,246,241,.12);box-shadow:0 20px 40px -16px rgba(0,0,0,.7);transform:translate(-50%,140%);transition:transform .6s var(--ease);font-size:14px}
.sticky-buy b{font-family:var(--grot);font-size:17px}
.sticky-buy.show{transform:translate(-50%,0)}

/* ---------- JS-driven initial states ---------- */
.js-anim .reveal{opacity:0;transform:translateY(36px)}
.js-anim .reveal-clip{clip-path:inset(100% 0 0 0)}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .chip-a{left:-8%}.chip-c{left:-2%}.chip-b{right:-2%}
  .parts{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .hero-grid,.hbt-grid,.hbh-grid,.founder-grid,.letter-grid,.who-grid,.contents,.author-grid,.faq-grid{grid-template-columns:1fr}
  .hero-grid>*,.hbt-grid>*,.hbh-grid>*,.founder-grid>*,.letter-grid>*,.who-grid>*,.contents>*,.author-grid>*,.faq-grid>*{grid-column:1/-1!important}
  .hero-foot{grid-template-columns:1fr;gap:26px}
  .hero-visual{display:none}
  .helix{right:-30%;opacity:.32}
  .founder-photo{max-width:420px}
  .who-no{margin-top:30px}
  .toc{margin-top:28px}
  .faq-list{margin-top:30px}
  .letter-side{margin-top:20px}
  .book-stage-hero{margin-top:40px;order:2}
  .hbt-grid .book-stage{margin-top:50px}
}
@media (max-width:767px){
  body{font-size:16px}
  .nav{grid-template-columns:1fr auto;padding:16px var(--pad)}
  .nav-links{display:none}
  .brand span{font-size:16.5px}
  .hero{padding-top:110px}
  .hero-title{margin:20px 0 28px;font-size:clamp(40px,11.6vw,64px)}
  .nav .btn{padding:10px 15px;font-size:13px;box-shadow:none}
  .hero-ctas{flex-direction:column;align-items:stretch;text-align:center}
  .hero-ctas .tlink{align-self:center}
  .hero-rule span:nth-child(2){display:none}
  .hero-rule{margin-top:36px}
  .tension-pin{min-height:auto;padding:100px var(--pad)}
  .story-pin{height:auto;padding:100px 0 70px}
  .story-head{position:static;padding:0 var(--pad)}
  .story-progress{display:none}
  .story-track{flex-direction:column;width:auto;padding-top:28px}
  .panel,.panel-intro{width:auto;min-height:0}
  .panel h3{margin-top:60px}
  .panel-intro h3,.panel-intro{padding:0}
  .parts{grid-template-columns:1fr}
  .part{min-height:220px}
  .hb-hero{align-items:flex-start;padding-top:110px}
  .hbh-title{margin:18px 0 24px}
  .buy-row{flex-direction:column;align-items:stretch}
  .buy-row .price-inline{justify-content:center;text-align:center}
  .footer-row{grid-template-columns:1fr;gap:18px}
  .ss-form{flex-direction:column;border-radius:20px}
  .ss-form input{padding:14px}
  .toc li{grid-template-columns:40px 1fr}
  .toc i{display:none}
}

/* ---------- hero belief line ---------- */
.hero-belief{font-family:var(--serif);font-style:italic;font-size:clamp(21px,1.75vw,27px);line-height:1.25;color:var(--peach);margin-bottom:16px;max-width:22em}

/* ---------- what is the brown gene ---------- */
.about{padding:clamp(100px,11vw,170px) var(--pad) clamp(90px,9vw,140px);position:relative}
.about-wrap{max-width:var(--max);margin:0 auto}
.about-statement{font-family:var(--serif);font-weight:400;font-size:clamp(38px,4.9vw,80px);line-height:1.03;letter-spacing:-.02em;max-width:15.5em;color:var(--ink)}
.about-statement em{color:var(--terra)}
.strands{margin-top:clamp(64px,7vw,110px);display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:clamp(18px,2.4vw,40px);align-items:start}
.strand{display:grid;gap:14px}
.strand-line{width:100%;height:24px;overflow:visible}
.strand-line path{fill:none;stroke:var(--terra);stroke-width:1.6;stroke-linecap:round;vector-effect:non-scaling-stroke}
.s-n{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--terra);margin-top:10px}
.strand h3{font-family:var(--serif);font-weight:400;font-size:clamp(38px,3.4vw,54px);line-height:1;letter-spacing:-.02em}
.strand p{color:var(--ink-soft);max-width:24em;line-height:1.6}
.strand-x{font-family:var(--serif);font-size:clamp(34px,3vw,48px);line-height:1;color:var(--orange);padding-top:64px;display:inline-block}
.founder-line{margin-top:clamp(70px,8vw,120px);padding-top:34px;border-top:1px solid rgba(28,25,23,.14);display:grid;grid-template-columns:auto 1fr auto;gap:26px;align-items:center}
.fl-avatar{width:72px;height:72px;border-radius:50%;overflow:hidden;flex:none;background:linear-gradient(160deg,#F4E3D3,#E9CDB4);box-shadow:inset 0 0 0 1px rgba(28,25,23,.10),0 0 0 4px rgba(194,65,12,.08);display:grid;place-items:center;color:rgba(28,25,23,.5);font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase}
.fl-avatar img{width:100%;height:100%;object-fit:cover;display:block}
.founder-line p{font-family:var(--serif);font-size:clamp(21px,1.8vw,28px);line-height:1.25;max-width:30em}
.founder-line p em{color:var(--terra)}
.founder-line p span{display:block;margin-top:10px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft)}
.fl-links{display:flex;gap:18px;font-family:var(--grot);font-weight:600;font-size:14px}
.fl-links a{border-bottom:1px solid rgba(28,25,23,.25);padding-bottom:2px;transition:color .3s,border-color .3s}
.fl-links a:hover{color:var(--terra);border-color:var(--terra)}
.about .sw{transition:none}
@media (max-width:900px){
  .strands{grid-template-columns:1fr;gap:34px}
  .strand-x{padding:0;justify-self:start;font-size:32px}
  .founder-line{grid-template-columns:auto 1fr;}
  .fl-avatar{width:56px;height:56px;align-self:start;margin-top:4px}
  .fl-links{grid-column:1/-1}
}
@media (prefers-reduced-motion:reduce){
  *,*:before,*:after{animation:none!important;transition:none!important}
  .story-pin{height:auto;padding:110px 0 80px}
  .story-head{position:static;padding:0 var(--pad)}
  .story-track{width:auto;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:24px}
  .panel{flex:none;scroll-snap-align:start}
  .tension-pin{min-height:auto}
}
.footer-socials{display:block;margin-bottom:10px}.footer-socials a{color:var(--peach)}

/* ---------- homepage hero headline: restored serif header (round 3), South Asian women in flat terracotta ---------- */
.page-home .nav{grid-template-columns:1fr auto}
.page-home .hero-title .acc{color:var(--terra)}
.page-home .hero-title .hero-tag{font-size:.76em}
.page-home .hero-title .hero-tag.first{margin-top:.2em}
@media (min-width:768px){.page-home .hero-title{font-size:clamp(48px,5.7vw,98px);margin-bottom:28px}}
.page-home .hero-belief{text-wrap:balance}
.page-home .hero-foot{display:grid;grid-template-columns:1fr;gap:0;max-width:30em}
.page-home .hero-belief{margin-bottom:16px}
.page-home .hero-sub{margin:0 0 26px}
.page-home .hero-ctas{align-items:flex-start}
@media (max-width:767px){
  .page-home .hero-title{font-size:clamp(40px,11.4vw,62px)}
  .page-home .hero-title .acc{white-space:nowrap}
  .page-home .hero-ctas{align-items:stretch}
}

/* ---------- 3D DNA hero (hero3d.js). .has-3d is only added once WebGL is running. ---------- */
.dna3d{position:absolute;pointer-events:none;display:block}
.dna-main{left:-40%;top:-12%;width:180%;height:124%;z-index:1}
.dna3d{-webkit-mask-image:linear-gradient(180deg,transparent 0,#000 14%,#000 86%,transparent 100%);mask-image:linear-gradient(180deg,transparent 0,#000 14%,#000 86%,transparent 100%)}
.hero-visual .chip{z-index:3}
.dna-bg{right:-22%;top:6%;width:82%;height:92%;z-index:-1;opacity:.4;-webkit-mask-image:linear-gradient(180deg,transparent,#000 14%,#000 86%,transparent),linear-gradient(90deg,transparent 0,#000 60%);mask-image:linear-gradient(180deg,transparent,#000 14%,#000 86%,transparent),linear-gradient(90deg,transparent 0,#000 60%);-webkit-mask-composite:source-in;mask-composite:intersect}
.has-3d .hero > .helix,.has-3d .hv-helix{display:none}

/* free-chapters link (sales page) */
.free-link{color:var(--cream);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(250,246,241,.45);font-weight:600}
.free-link:hover{text-decoration-color:#C2410C}
.price-inline small .free-link{opacity:1}
.pc-note .free-link{display:block;margin-top:10px}
.pc-guarantee{color:var(--cream);font-weight:600}
.price-inline [data-tbg="label"]{font-size:13px;color:#FB923C;font-weight:600}

/* black TBG mark: hairline ring so the black tile reads on espresso as well as on paper */
.brand img,.bf-top img{box-shadow:0 0 0 1px rgba(250,246,241,.16)}

/* author slot until a real photo is supplied: quiet brand tile, no placeholder text */
.ph.ph-brand{align-items:center;justify-content:center;padding:0;border:0;background:radial-gradient(120% 90% at 30% 20%,#2C201A,#16110F)}
.ph.ph-brand img{width:22%;height:auto;border-radius:22%;box-shadow:0 0 0 1px rgba(250,246,241,.14)}

/* ---------- round: calmer hero, sage accent, clean strands, unclipped handbook title ---------- */
:root{--sage:#4D7C6F;--sage-l:#8FBFB1}
/* home hero: headline + one line + one CTA */
.page-home .hero-title{margin-top:0}
.page-home .hero-foot .hero-sub{font-size:clamp(17px,1.35vw,20px);color:rgba(250,246,241,.78);max-width:26em;margin:0 0 30px;text-wrap:pretty}
/* Genetics / Culture / History: hairline dividers, sage numerals */
.strands{grid-template-columns:repeat(3,1fr)}
.strand{border-top:1px solid var(--line);padding-top:22px}
.s-n{color:var(--sage);margin-top:0}
@media (max-width:767px){.strands{grid-template-columns:1fr;gap:40px}}
/* sage as the supporting accent */
.paper .sec-mark span{color:var(--sage);opacity:1}
.free-link{text-decoration-color:var(--sage-l)}
.free-link:hover{color:var(--sage-l);text-decoration-color:var(--sage-l)}
/* /handbook/ title: one treatment, solid terracotta, nothing clipped */
.hbh-title .ln{padding-bottom:.26em;margin-bottom:-.22em}
.hbh-title .hbh-acc{color:var(--terra)}
/* no author photo yet: on single-column layouts skip the empty tile rather than show a big dark block */
@media (max-width:900px){.founder-photo:has(.ph-brand){display:none}}

/* ---------- review round: real contents, notes, contrast, mobile helix ---------- */
/* --terra-ink: terracotta darkened for small text on paper/cream (5.5:1 on #F3ECE3); --sage-ink likewise (5.2:1). */
:root{--terra-ink:#A63A0B;--sage-ink:#3F6A5E;--mute-ink:#6F645D}
.paper .sec-mark,.paper .s-n,.s-n{color:var(--terra-ink)}
.paper .sec-mark span{color:var(--sage-ink);opacity:1}
.sig span,.founder-line p span{color:var(--mute-ink)}
.copy{color:rgba(250,246,241,.66)}
.copy a{display:inline-block;padding:5px 0;min-height:24px}
.footer-socials a{display:inline-block;padding:5px 0}
.contents-head p{color:rgba(250,246,241,.66)}
.toc-real li{counter-increment:none;grid-template-columns:52px 1fr auto;padding:18px 0}
.toc-real li:before{content:none}
.toc-real .n{font-family:var(--mono);font-weight:500;font-size:12px;color:var(--orange)}
.toc-real span small{display:block;margin-top:6px;font-size:14.5px;line-height:1.5;font-weight:400;color:rgba(250,246,241,.68);max-width:44em}
.toc-real i.free{color:var(--sage-l);border:1px solid rgba(143,191,177,.45);border-radius:999px;padding:3px 9px 2px;align-self:start;margin-top:2px}
.toc-real li:hover small{color:rgba(250,246,241,.8)}
.soon-note{margin-top:14px;font-size:13.5px;color:rgba(250,246,241,.72)}
.pricing .soon-note,.price-card .soon-note{margin:14px 0 0;text-align:center}

@media (max-width:900px){
  .toc-real li{grid-template-columns:40px 1fr auto}
  .toc i.free{display:inline-block}
  .toc-real span{font-size:17px}

  /* mobile hero: the 3D helix sits further right and fainter so the paragraph reads cleanly */
  .dna-bg{right:-38%;opacity:.22}
  .page-home .hero > .helix{opacity:.35}
}

/* ---------- sticky buy bar v2: two calm lines + button; full-width bar on phones ---------- */
.sticky-buy{gap:18px;padding:8px 8px 8px 22px;white-space:nowrap;bottom:calc(18px + env(safe-area-inset-bottom,0px))}
.sticky-buy:not(.show){transform:translate(-50%,calc(100% + 40px + env(safe-area-inset-bottom,0px)))}
.sb-info{display:flex;align-items:baseline;gap:12px;min-width:0}
.sb-price{display:inline-flex;align-items:baseline;gap:8px}
.sb-price b{font-family:var(--grot);font-size:17px;font-weight:600;letter-spacing:-.01em;color:var(--cream)}
.sb-price s{font-size:13px;color:rgba(250,246,241,.5)}
.sb-meta{font-size:13px;color:rgba(250,246,241,.7);overflow:hidden;text-overflow:ellipsis}
.sb-short,.sb-mid{display:none}
.sb-btn{flex:none}
@media (max-width:640px){
  .sticky-buy{left:12px;right:12px;width:auto;transform:none;justify-content:space-between;gap:12px;padding:10px 10px 10px 18px;border-radius:18px;bottom:calc(12px + env(safe-area-inset-bottom,0px));background:rgba(22,17,15,.92)}
  .sticky-buy.show{transform:none}
  .sticky-buy:not(.show){transform:translateY(calc(100% + 24px + env(safe-area-inset-bottom,0px)))}
  .sb-info{flex-direction:column;align-items:flex-start;gap:2px}
  .sb-price b{font-size:18px;line-height:1.1}
  .sb-meta{font-size:12px;line-height:1.3;max-width:100%}
  .sb-btn{padding-left:18px;padding-right:18px;min-height:44px}
  .sb-long{display:none}.sb-mid{display:inline}
}
@media (max-width:360px){
  .sb-mid{display:none}.sb-short{display:inline}
  .sticky-buy{padding-left:14px;gap:10px}
  .sb-btn{padding-left:14px;padding-right:14px;font-size:13px}
}

/* ---------- one style per heading: no italic or colour-accent words ---------- */
h1 em,h2 em,h3 em,.footer-big em{font:inherit;font-style:normal;color:inherit}
.page-home .hero-title .acc,.hero-title .acc,.hero-title .it,.hbh-title .it{color:inherit;font-style:normal}
.who-no .label{font-style:normal}
.nav-buy .nb-open{display:inline-flex;gap:.45em}
/* deliberate exceptions to the heading reset (kept by request) */
.paper h2.d-l em.h-accent{font-family:var(--serif);font-style:italic;font-weight:400;color:var(--terra)}
.hbh-title .w.hbh-acc{color:var(--terra)}