/* ============================================================
   THE PURPLE OCEAN ENGINE — deck-consistent editorial web doc
   dark: #0A0A0A · deck purple: #CDADFF · light accent: #6D28D9
   ============================================================ */
:root{
  --dark:#0A0A0A;
  --dark-2:#131316;
  --card:#18181D;
  --purple:#CDADFF;
  --purple-deep:#6D28D9;
  --purple-pale:#F4EEFF;
  --paper:#FCFBF9;
  --ink:#141416;
  --mute:#5C5C66;
  --line:#E5E2DC;
  --line-dark:#2A2A32;
  --green:#15803D;
  --green-bright:#4ADE80;
  --red:#B91C1C;
  --red-bright:#FF5A5F;
  --blue-bright:#4FA3FF;
  --disp:"Archivo Black","Archivo",Arial,sans-serif;
  --sans:"Archivo",Arial,sans-serif;
  --serif:"Source Serif 4",Georgia,serif;
  --mono:ui-monospace,"Cascadia Code",Menlo,Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
[id]{scroll-margin-top:76px}
html:focus-within{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--serif);font-size:1.075rem;line-height:1.72;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--purple-deep)}
::selection{background:var(--purple);color:var(--dark)}

/* ---------- progress bar + nav ---------- */
#progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--purple-deep),var(--purple));z-index:60}
nav{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;gap:18px;
  padding:12px 20px;background:rgba(10,10,10,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(205,173,255,.14);transform:translateY(-110%);transition:transform .35s ease}
nav.on{transform:translateY(0)}
nav .brand{display:flex;align-items:center;gap:10px;margin-right:auto;text-decoration:none}
nav .brand img{height:15px;width:auto}
nav a.lnk{font-family:var(--sans);font-weight:500;font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;
  color:#C9C9D2;text-decoration:none;transition:color .2s}
nav a.lnk:hover{color:var(--purple)}
nav a.lnk.hot{color:var(--purple)}
@media(max-width:760px){nav a.lnk{display:none}nav a.lnk.always{display:block}}

/* ---------- shared layout ---------- */
.wrap{max-width:760px;margin:0 auto;padding:0 22px}
.wrap.wide{max-width:960px}
section.reading{padding:56px 0 8px}
.kicker{font-family:var(--sans);font-weight:700;font-size:.76rem;letter-spacing:.22em;text-transform:uppercase;color:var(--purple-deep);margin-bottom:14px}
.dark .kicker{color:var(--purple)}
h2.sec{font-family:var(--disp);font-weight:400;font-size:clamp(1.7rem,4.2vw,2.4rem);line-height:1.08;letter-spacing:-.01em;margin:0 0 18px}
h3.sub{font-family:var(--sans);font-weight:700;font-size:1.12rem;letter-spacing:-.005em;color:var(--purple-deep);margin:40px 0 12px}
h4{font-family:var(--sans);font-weight:700;font-size:1rem;margin:22px 0 8px}
p{margin:0 0 18px}
p.lede{font-size:1.22rem;line-height:1.6;color:#3A3A42}
ul,ol{margin:0 0 18px 22px}
li{margin-bottom:8px}
strong{font-weight:600}
.small{font-size:.86rem;color:var(--mute)}
.num{color:var(--purple-deep);margin-right:.35em}

/* ---------- hero ---------- */
header.hero{background:var(--dark);color:#fff;position:relative;overflow:hidden;padding:96px 0 84px}
header.hero::before{content:"";position:absolute;inset:-40% -20% auto;height:120%;
  background:radial-gradient(ellipse 60% 55% at 72% 18%,rgba(109,40,217,.5),transparent 65%),
             radial-gradient(ellipse 45% 40% at 18% 82%,rgba(205,173,255,.16),transparent 70%);
  pointer-events:none}
header.hero::after{content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.055) 1px,transparent 1px);background-size:26px 26px}
.hero-in{position:relative;z-index:2}
.hero .logo{height:17px;width:auto;margin-bottom:56px}
.hero .kick{font-family:var(--sans);font-weight:700;font-size:.78rem;letter-spacing:.24em;text-transform:uppercase;color:var(--purple);margin-bottom:22px}
.hero h1{font-family:var(--disp);font-weight:400;font-size:clamp(2.6rem,8.2vw,5.1rem);line-height:.98;letter-spacing:-.015em;margin-bottom:26px}
.hero h1 .p{color:var(--purple)}
.hero .talk-title{font-family:var(--serif);font-style:italic;font-size:clamp(1.08rem,2.6vw,1.4rem);line-height:1.5;color:#E6E6EE;max-width:620px;margin-bottom:34px}
.hero .promise{font-family:var(--sans);font-weight:500;font-size:.95rem;line-height:1.65;color:#B9B9C6;max-width:560px;margin-bottom:42px}
.hero .promise strong{color:#fff;font-weight:700}
.hero .byline{display:flex;align-items:center;gap:14px;margin-bottom:46px}
.hero .byline img{width:52px;height:52px;border-radius:50%;object-fit:cover;object-position:top;border:2px solid rgba(205,173,255,.45)}
.hero .byline .t{font-family:var(--sans);font-size:.88rem;line-height:1.45;color:#C9C9D2}
.hero .byline .t b{color:#fff}
.scrollcue{margin-top:54px;font-family:var(--sans);font-weight:500;font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:#8B8B98}
.scrollcue span{display:inline-block;animation:bob 2.2s ease-in-out infinite;margin-right:8px;color:var(--purple)}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(5px)}}

/* ---------- dark divider bands ---------- */
.band{background:var(--dark);color:#fff;padding:76px 0;position:relative;overflow:hidden;margin:64px 0 0}
.band::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse 55% 70% at 85% 30%,rgba(109,40,217,.38),transparent 65%)}
.band .in{position:relative;z-index:2}
.band .step-no{font-family:var(--disp);font-size:clamp(3.4rem,10vw,5.6rem);line-height:1;color:var(--purple);margin-bottom:8px}
.band h2{font-family:var(--disp);font-weight:400;font-size:clamp(1.9rem,5.4vw,3rem);line-height:1.05;letter-spacing:-.01em;margin-bottom:16px}
.band p.sub{font-family:var(--sans);font-weight:400;font-size:1.02rem;line-height:1.65;color:#C9C9D2;max-width:600px;margin:0}
.band .tick{color:var(--green-bright)}

/* ---------- figure ---------- */
figure{margin:28px 0}
figure img{border-radius:14px;border:1px solid var(--line);box-shadow:0 18px 50px -18px rgba(20,20,22,.28)}
figure.dark-img img{border-color:var(--line-dark)}
figcaption{font-family:var(--sans);font-size:.82rem;color:var(--mute);margin-top:10px;line-height:1.5}
.fig-2{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
@media(max-width:640px){.fig-2{grid-template-columns:1fr}}
.fig-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;align-items:start}
@media(max-width:640px){.fig-3{grid-template-columns:1fr}}

/* ---------- probability bars ---------- */
.bars{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 22px 14px;margin:26px 0;font-family:var(--sans)}
.bars .prompt-line{font-size:.95rem;margin-bottom:16px}
.barrow{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.barrow .w{width:104px;text-align:right;font-size:.86rem;flex-shrink:0}
.barrow .track{flex:1;background:#F0EEE9;border-radius:5px;overflow:hidden}
.barrow .fill{height:16px;border-radius:5px;background:#D4D1CA;width:0;transition:width 1s cubic-bezier(.2,.7,.2,1)}
.barrow.top .fill{background:var(--purple-deep)}
.barrow .pct{width:44px;font-size:.86rem;font-weight:700;flex-shrink:0}
.barrow.top .pct{color:var(--purple-deep)}
.bars .note{font-size:.82rem;color:var(--mute);margin:14px 0 6px;line-height:1.55}

/* ---------- ocean cards ---------- */
.oceans{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px;margin:28px 0}
@media(max-width:640px){.oceans{grid-template-columns:1fr}}
.ocean{background:var(--dark);color:#fff;border-radius:16px;padding:24px 20px;position:relative;overflow:hidden}
.ocean h4{font-family:var(--disp);font-weight:400;font-size:1.35rem;margin:0 0 8px}
.ocean p{font-family:var(--sans);font-size:.88rem;line-height:1.55;color:#C9C9D2;margin:0}
.ocean.red h4{color:var(--red-bright)}
.ocean.blue h4{color:var(--blue-bright)}
.ocean.purple{border:1.5px solid var(--purple);box-shadow:0 14px 44px -14px rgba(109,40,217,.55)}
.ocean.purple h4{color:var(--purple)}
.ocean.purple::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 90% 70% at 50% 115%,rgba(109,40,217,.4),transparent 70%);pointer-events:none}

/* ---------- engine overview cards ---------- */
.engine-cards{display:grid;gap:14px;margin:30px 0}
.ecard{display:flex;gap:18px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;text-decoration:none;color:var(--ink);transition:border-color .2s,transform .2s,box-shadow .2s}
.ecard:hover{border-color:var(--purple-deep);transform:translateY(-2px);box-shadow:0 16px 40px -18px rgba(109,40,217,.35)}
.ecard .n{font-family:var(--disp);font-size:1.9rem;line-height:1;color:var(--purple-deep);flex-shrink:0;width:44px}
.ecard .h{font-family:var(--sans);font-weight:700;font-size:1.05rem;margin-bottom:5px}
.ecard .d{font-family:var(--sans);font-size:.9rem;line-height:1.6;color:var(--mute)}

/* ---------- chain diagram ---------- */
.chain{display:flex;align-items:stretch;gap:8px;margin:28px 0;flex-wrap:nowrap}
.chain .link{flex:1;background:var(--dark);color:#fff;border-radius:10px;padding:14px 8px;text-align:center;
  font-family:var(--sans);font-weight:700;font-size:.72rem;letter-spacing:.05em;display:flex;align-items:center;justify-content:center;line-height:1.35}
.chain .link.hot{background:#221639;color:var(--purple);border:1.5px solid var(--purple)}
.chain .arr{align-self:center;color:var(--mute);font-weight:700;flex-shrink:0}
@media(max-width:640px){
  .chain{flex-direction:column;gap:6px}
  .chain .link{padding:12px}
  .chain .arr{transform:rotate(90deg)}
}
.chain-label{font-family:var(--sans);font-weight:700;font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;color:var(--purple-deep);text-align:center;margin:-16px 0 28px}

/* ---------- callouts / boxes ---------- */
.callout{background:var(--purple-pale);border-left:4px solid var(--purple-deep);border-radius:0 12px 12px 0;padding:18px 22px;margin:26px 0}
.callout .t{font-family:var(--sans);font-weight:700;color:var(--purple-deep);margin-bottom:6px;font-size:.95rem}
.callout p{margin:0;font-size:1rem}
.callout p+p{margin-top:10px}
.honesty{border:1.5px solid var(--ink);border-radius:14px;padding:22px 24px;margin:28px 0;background:#fff}
.honesty .t{font-family:var(--sans);font-weight:700;font-size:1.02rem;margin-bottom:10px}
.honesty ul{margin-bottom:0}
.honesty li{font-size:.98rem}
.yes{color:var(--green);font-weight:700}
.no{color:var(--red);font-weight:700}

/* ---------- prompt boxes ---------- */
.prompt-unit{margin:26px 0}
.promptlabel{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--purple-deep);color:#fff;
  border-radius:12px 12px 0 0;padding:10px 16px;font-family:var(--sans);font-weight:700;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase}
.copybtn{font-family:var(--sans);font-weight:700;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;
  background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.35);border-radius:7px;padding:5px 12px;cursor:pointer;transition:background .2s}
.copybtn:hover{background:rgba(255,255,255,.3)}
.copybtn.ok{background:var(--green);border-color:var(--green)}
.promptbox{background:var(--dark);color:#E9E9F2;border-radius:0 0 12px 12px;padding:20px 22px;
  font-family:var(--mono);font-size:.83rem;line-height:1.65;white-space:pre-wrap;overflow-x:auto}

/* ---------- number cards (worked example) ---------- */
.numrow{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:28px 0}
@media(max-width:640px){.numrow{grid-template-columns:1fr}}
.numcard{background:var(--dark);border-radius:16px;padding:24px 18px;text-align:center}
.numcard .big{font-family:var(--disp);font-size:2.4rem;line-height:1;margin-bottom:6px}
.numcard .unit{font-family:var(--sans);font-weight:700;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:10px}
.numcard .desc{font-family:var(--sans);color:#C9C9D2;font-size:.84rem;line-height:1.55}
.numcard .src{color:#8B8B98;font-size:.74rem;font-style:italic;margin-top:10px;font-family:var(--sans)}
.c-white{color:#fff}.c-purple{color:var(--purple)}.c-green{color:var(--green-bright)}

/* ---------- steps ---------- */
.step{display:flex;gap:16px;margin:0 0 22px}
.step .n{flex:0 0 34px;height:34px;border-radius:10px;background:var(--purple-deep);color:#fff;
  font-family:var(--sans);font-weight:700;font-size:1.05rem;display:flex;align-items:center;justify-content:center}
.step .body .h{font-family:var(--sans);font-weight:700;font-size:1.08rem;margin-bottom:5px}
.step .body p{margin-bottom:10px}
.step .body p:last-child{margin-bottom:0}

/* ---------- tables ---------- */
.tblwrap{overflow-x:auto;margin:24px 0;-webkit-overflow-scrolling:touch}
table{width:100%;min-width:560px;border-collapse:collapse;font-size:.92rem;font-family:var(--sans)}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 16px;font-family:var(--sans)}
.chip{background:var(--dark);color:#fff;border-radius:100px;padding:9px 18px;font-weight:700;font-size:.86rem;letter-spacing:.03em}
.chip.hot{background:var(--purple-deep)}
.chip.more{background:transparent;border:1.5px dashed var(--mute);color:var(--mute);font-weight:500}
th{background:var(--dark);color:#fff;text-align:left;padding:10px 12px;font-size:.8rem;letter-spacing:.04em;text-transform:uppercase}
th:first-child{border-radius:10px 0 0 0}th:last-child{border-radius:0 10px 0 0}
td{border-bottom:1px solid var(--line);padding:11px 12px;vertical-align:top;line-height:1.55}
td em{font-family:var(--serif)}

/* ---------- payoff ---------- */
.payoff{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:28px 0}
@media(max-width:640px){.payoff{grid-template-columns:1fr}}
.pay{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px 20px}
.pay .arrow{font-family:var(--disp);font-size:1.7rem;line-height:1;margin-bottom:8px}
.pay .m{font-family:var(--sans);font-weight:700;font-size:1rem;margin-bottom:6px}
.pay .d{font-family:var(--sans);font-size:.87rem;line-height:1.6;color:var(--mute)}
.pay.down .arrow{color:var(--green)}
.pay.up .arrow{color:var(--purple-deep)}

/* ---------- quote ---------- */
.quote{font-family:var(--serif);font-style:italic;font-size:1.35rem;line-height:1.5;margin:30px 0;padding-left:22px;border-left:3px solid var(--purple)}

/* ---------- takeaways ---------- */
.takeaways{display:grid;gap:14px;margin:30px 0}
.take{background:var(--dark);color:#fff;border-radius:16px;padding:26px 24px;position:relative;overflow:hidden}
.take::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 70% 90% at 100% 0%,rgba(109,40,217,.3),transparent 60%);pointer-events:none}
.take .n{font-family:var(--disp);color:var(--purple);font-size:1rem;margin-bottom:8px}
.take .h{font-family:var(--disp);font-weight:400;font-size:1.5rem;margin-bottom:8px}
.take p{font-family:var(--sans);color:#C9C9D2;font-size:.93rem;line-height:1.6;margin:0;position:relative;z-index:2}

/* ---------- appendix ---------- */
.study{border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin-bottom:14px;background:#fff}
.study .cite{font-family:var(--sans);font-size:.88rem;line-height:1.6;margin-bottom:8px}
.study .cite b{font-weight:700}
.study .find{font-size:.95rem;line-height:1.6;margin:0}
.study .pmid{display:inline-block;font-family:var(--mono);font-size:.76rem;background:var(--purple-pale);color:var(--purple-deep);border-radius:6px;padding:2px 8px;margin-left:6px;text-decoration:none;font-weight:600}

/* ---------- CTA / footer ---------- */
.cta-band{background:var(--dark);color:#fff;padding:80px 0;margin-top:72px;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 60% 80% at 50% 120%,rgba(109,40,217,.45),transparent 70%);pointer-events:none}
.cta-band .in{position:relative;z-index:2}
.cta-band h2{font-family:var(--disp);font-weight:400;font-size:clamp(1.9rem,5.5vw,3rem);line-height:1.12;margin-bottom:20px}
.cta-band p{color:#C9C9D2;font-family:var(--sans);font-size:1rem;line-height:1.7;max-width:600px}
.btnrow{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.btn{display:inline-block;font-family:var(--sans);font-weight:700;font-size:.92rem;letter-spacing:.02em;text-decoration:none;
  border-radius:12px;padding:15px 28px;transition:transform .2s,box-shadow .2s}
.btn.primary{background:var(--purple);color:var(--dark)}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px -10px rgba(205,173,255,.5)}
.btn.ghost{border:1.5px solid rgba(205,173,255,.5);color:var(--purple)}
.btn.ghost:hover{border-color:var(--purple);transform:translateY(-2px)}
footer{background:var(--dark);color:#8B8B98;padding:40px 0 48px;border-top:1px solid var(--line-dark)}
footer .frow{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer img{height:14px;width:auto;opacity:.85}
footer p{font-family:var(--sans);font-size:.8rem;line-height:1.6;margin:0}
footer a{color:#B9B9C6}

/* ---------- language switch ---------- */
.langsw{display:inline-flex;border:1px solid rgba(205,173,255,.35);border-radius:100px;overflow:hidden;font-family:var(--sans);font-weight:700;font-size:.72rem;letter-spacing:.08em;flex-shrink:0}
.langsw a{color:#C9C9D2;text-decoration:none;padding:6px 13px;transition:color .2s}
.langsw a:hover{color:#fff}
.langsw a.on{background:var(--purple);color:var(--dark)}
.langsw a.on:hover{color:var(--dark)}
.hero-topline{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:56px}
.hero-topline .logo{margin-bottom:0}

/* ---------- reveal on scroll ---------- */
.rv{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;transition:none}
  .scrollcue span{animation:none}
  html{scroll-behavior:auto}
}

/* ---------- print ---------- */
@media print{
  nav,#progress,.scrollcue,.copybtn,.btnrow{display:none!important}
  body{font-size:10.5pt}
  header.hero,.band,.cta-band,footer{background:#fff!important;color:#000!important;-webkit-print-color-adjust:exact}
  header.hero h1,.band h2,.band .step-no{color:#000!important}
  .hero .talk-title,.hero .promise,.band p.sub{color:#333!important}
  .rv{opacity:1!important;transform:none!important}
  section.reading,.band{page-break-inside:avoid-page}
}