:root{
  --ink:#121829;          /* deck navy */
  --ink-2:#1a2238;
  --ink-3:#252e48;
  --void:#0b0f1c;
  --paper:#f4f3f0;
  --paper-2:#ebe9e4;
  --white:#ffffff;
  --orange:#e35b32;
  --orange-hi:#ff7a4d;
  --orange-lo:#a8401f;
  --mute:#6b7280;
  --mute-d:#9aa3b8;       /* muted text on dark */
  --line:rgba(18,24,41,.14);
  --line-d:rgba(255,255,255,.12);
  --teal:#3fb8a6;         /* secondary accent: "existing/typical" data */
  --sans:"Inter",system-ui,-apple-system,sans-serif;
  --display:"Inter Tight","Inter",system-ui,sans-serif;
  --mono:"Space Mono",ui-monospace,SFMono-Regular,monospace;
  --gut:clamp(16px,5vw,96px);
  --max:1360px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scrollbar-color:#e35b3266 var(--void);scrollbar-width:thin}
body{background:var(--void);color:var(--paper);font-family:var(--sans);overflow-x:hidden;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body.loading{overflow:hidden}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--orange);color:#fff}
:focus-visible{outline:2px solid var(--orange-hi);outline-offset:3px}
img,svg,canvas{display:block;max-width:100%}

/* ---------- section themes ---------- */
main>section{position:relative;overflow:clip}
.t-dark{background:var(--ink);color:var(--paper)}
.t-void{background:var(--void);color:var(--paper)}
.t-light{background:var(--paper);color:var(--ink)}
.t-white{background:var(--white);color:var(--ink)}

.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
.pad{padding-top:clamp(96px,14vh,180px);padding-bottom:clamp(96px,14vh,180px)}

/* ---------- type ---------- */
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.28em;text-transform:uppercase;color:var(--orange);font-weight:700;display:flex;align-items:center;gap:14px}
.eyebrow .n{color:inherit;opacity:.55}
.eyebrow:before{content:"";width:28px;height:1px;background:currentColor}
.h1,.h2,.h3{font-family:var(--display);font-weight:800;letter-spacing:-.035em;line-height:.98}
.h1{font-size:clamp(48px,8.4vw,136px)}
.h2{font-size:clamp(38px,5.6vw,88px)}
.h3{font-size:clamp(24px,2.6vw,38px);letter-spacing:-.025em;line-height:1.05}
.accent{color:var(--orange)}
.lede{font-size:clamp(18px,1.55vw,23px);line-height:1.5;max-width:46ch;opacity:.82}
.t-light .lede,.t-white .lede{opacity:1;color:#3e4558}
.mono{font-family:var(--mono)}
.label{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;opacity:.6}
.stat{font-family:var(--display);font-weight:800;letter-spacing:-.04em;line-height:.9;font-size:clamp(44px,5.5vw,84px);color:var(--orange)}
.fine{font-size:12px;opacity:.55;line-height:1.5}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.08s}.reveal[data-d="2"]{transition-delay:.16s}.reveal[data-d="3"]{transition-delay:.24s}.reveal[data-d="4"]{transition-delay:.32s}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- loader ---------- */
#loader{position:fixed;inset:0;z-index:200;background:var(--void);display:grid;place-items:center;transition:opacity .9s .1s,visibility 0s 1s}
#loader.done{opacity:0;visibility:hidden}
#loader .lw{font-family:var(--display);font-weight:800;font-size:clamp(36px,6vw,64px);letter-spacing:-.04em;color:#fff;display:flex;align-items:baseline}
#loader .lw i{color:var(--orange);font-style:normal;animation:blink 1s steps(2) infinite}
#loader .lt{font-family:var(--mono);font-size:11px;letter-spacing:.3em;text-transform:uppercase;color:var(--mute-d);margin-top:18px;text-align:center}
#loader .lbar{width:220px;height:1px;background:#ffffff1a;margin:14px auto 0;overflow:hidden}
#loader .lbar i{display:block;height:100%;width:0;background:var(--orange);box-shadow:0 0 12px var(--orange);transition:width .3s}
@keyframes blink{50%{opacity:.2}}

/* ---------- nav ---------- */
#nav{position:fixed;inset:0 0 auto;z-index:80;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:18px var(--gut);font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--paper);transition:background .4s,color .4s,border-color .4s;border-bottom:1px solid transparent}
#nav.solid{background:#0b0f1ccc;backdrop-filter:blur(12px) saturate(1.3);-webkit-backdrop-filter:blur(12px) saturate(1.3);border-color:var(--line-d)}
#nav.ink{color:var(--ink)}
#nav.ink.solid{background:#f4f3f0d9;border-color:var(--line)}
#nav .brand{font-family:var(--display);font-weight:800;font-size:22px;letter-spacing:-.03em;text-transform:none;text-decoration:none;display:flex;align-items:baseline}
#nav .brand i{color:var(--orange);font-style:normal}
#nav .links{display:flex;gap:28px}
#nav .links a{text-decoration:none;opacity:.72;transition:opacity .3s,color .3s;position:relative;white-space:nowrap}
#nav .links a:hover,#nav .links a.on{opacity:1;color:var(--orange)}
#nav .cta{padding:10px 16px;border:1px solid currentColor;text-decoration:none;white-space:nowrap;transition:background .3s,color .3s,border-color .3s}
#nav .cta:hover{background:var(--orange);border-color:var(--orange);color:#fff}
@media (max-width:980px){#nav .links{display:none}}

/* ---------- chapter rail ---------- */
#rail{position:fixed;right:clamp(10px,1.6vw,26px);top:50%;transform:translateY(-50%);z-index:70;display:flex;flex-direction:column;gap:12px;mix-blend-mode:difference}
#rail a{display:flex;align-items:center;justify-content:flex-end;gap:10px;text-decoration:none;color:#fff;font-family:var(--mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase}
#rail a span{opacity:0;transform:translateX(6px);transition:opacity .3s,transform .3s;white-space:nowrap}
#rail a:hover span,#rail a.on span{opacity:.9;transform:none}
#rail a b{width:8px;height:8px;border:1px solid #fff;transition:background .3s,transform .3s}
#rail a.on b{background:#fff;transform:rotate(45deg)}
@media (max-width:760px){#rail{display:none}}
#progress{position:fixed;left:0;top:0;height:2px;width:100%;transform-origin:0 50%;transform:scaleX(0);background:var(--orange);z-index:90}

/* ---------- grain ---------- */
#grain{position:fixed;inset:-100px;z-index:85;pointer-events:none;opacity:.04;animation:grain .9s steps(5) infinite;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E")}
@keyframes grain{0%{transform:translate(0)}20%{transform:translate(-37px,21px)}40%{transform:translate(23px,-49px)}60%{transform:translate(-11px,33px)}80%{transform:translate(41px,9px)}to{transform:translate(0)}}
@media (prefers-reduced-motion:reduce){#grain{animation:none}}

/* ---------- 3D canvas helper ---------- */
.gl{position:absolute;inset:0;width:100%;height:100%;display:block}
.pin-stage{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden}

/* ---------- footer ---------- */
footer{background:var(--void);color:var(--mute-d);font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;padding-top:28px;padding-bottom:28px;border-top:1px solid var(--line-d)}
footer a{color:var(--orange);text-decoration:none}
@media (max-width:1280px){#rail a span{display:none}}