/* =============================================================
   base.css — layout, type and colour.
   Contains NO animation. Everything that moves lives in motion.css
   ============================================================= */

@font-face{font-family:'Bricolage';src:url('../assets/fonts/bricolage-var.woff2') format('woff2');font-weight:700 800;font-display:swap}
@font-face{font-family:'Instrument';src:url('../assets/fonts/instrument-var.woff2') format('woff2');font-weight:400 500;font-display:swap}
@font-face{font-family:'MartianMono';src:url('../assets/fonts/martianmono-400.woff2') format('woff2');font-weight:400;font-display:swap}

:root{
  /* ---- colour ---- */
  --ink:        #07080a;
  --ink-2:      #0c0e12;
  --ink-3:      #131720;
  --paper:      #f2ede3;
  --text:       #e8e3d8;
  --text-dim:   #9a9587;
  --line:       rgba(232,227,216,.12);
  --accent:     #ff4a1c;
  --accent-2:   #ffb457;
  --mint:       #6fe3bd;

  /* ---- type ---- */
  --display: 'Bricolage', Georgia, serif;
  --body:    'Instrument', system-ui, sans-serif;
  --mono:    'MartianMono', ui-monospace, monospace;

  /* ---- rhythm ---- */
  --gutter: clamp(20px, 5vw, 72px);
  --maxw: 1240px;
  --radius: 14px;

  /* ---- motion tokens (durations/easings consumed by motion.css) ---- */
  --dur-fast:  180ms;
  --dur-hover: 260ms;
  --dur-reveal: 900ms;
  --ease-out:  cubic-bezier(.16,1,.3,1);
  --ease-soft: cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--body);
  font-size:clamp(15px,.55vw + 13.6px,17px);
  line-height:1.62;
  letter-spacing:.005em;
  overflow-x:clip;
  -webkit-font-smoothing:antialiased;
}
img,canvas,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--accent-2);outline-offset:3px;border-radius:4px}

/* =============== ambient backdrop =============== */
.ambient{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
#ambient-canvas{position:absolute;inset:0;width:100%;height:100%}
/* The softness comes from the gradient itself, NOT from filter:blur().
   A blur filter on a half-viewport element is re-rasterised on every
   frame it animates and was the single most expensive thing on the page. */
.ambient__glow{position:absolute;border-radius:50%;opacity:.5}
.ambient__glow--a{width:76vw;height:76vw;left:-24vw;top:-26vw;
  background:radial-gradient(circle closest-side,rgba(255,74,28,.30),rgba(255,74,28,.12) 42%,transparent 72%)}
.ambient__glow--b{width:68vw;height:68vw;right:-20vw;top:16vh;
  background:radial-gradient(circle closest-side,rgba(111,227,189,.16),rgba(111,227,189,.06) 40%,transparent 72%)}
.ambient__grain{
  position:absolute;inset:-120px;opacity:.16;
  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='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* =============== nav =============== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  display:flex;align-items:center;gap:24px;
  padding:16px var(--gutter);
  background:rgba(7,8,10,0);
  border-bottom:1px solid transparent;
}
.nav.is-stuck{
  background:rgba(7,8,10,.72);
  backdrop-filter:blur(14px) saturate(1.3);
  -webkit-backdrop-filter:blur(14px) saturate(1.3);
  border-bottom-color:var(--line);
}
.nav__brand{
  display:flex;align-items:center;gap:10px;
  font-family:var(--display);font-weight:800;font-size:17px;letter-spacing:-.02em;
  margin-right:auto;
}
.nav__mark{
  width:13px;height:13px;border-radius:3px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
}
.nav__links{display:flex;gap:26px;font-size:13.5px;color:var(--text-dim)}
.nav__links a{position:relative;padding:4px 0}
.nav__links a::after{
  content:'';position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
}
.nav__tools{display:flex;align-items:center;gap:14px}

.fps{
  display:flex;align-items:baseline;gap:5px;
  font-family:var(--mono);font-size:10.5px;color:var(--text-dim);
  padding:5px 9px;border:1px solid var(--line);border-radius:999px;
}
.fps__dot{width:6px;height:6px;border-radius:50%;background:var(--mint);align-self:center}
.fps__val{color:var(--text);min-width:2ch;text-align:right}
.fps.is-low .fps__dot{background:var(--accent-2)}

.toggle{
  display:flex;align-items:center;gap:9px;
  background:none;border:1px solid var(--line);border-radius:999px;
  padding:5px 12px 5px 7px;color:var(--text-dim);cursor:pointer;
  font-family:var(--body);font-size:12.5px;
}
.toggle:hover{border-color:rgba(232,227,216,.3);color:var(--text)}
.toggle__track{
  width:30px;height:17px;border-radius:999px;
  background:rgba(232,227,216,.14);position:relative;flex:none;
}
.toggle__thumb{
  position:absolute;top:2.5px;left:2.5px;width:12px;height:12px;border-radius:50%;
  background:var(--text-dim);
}
.toggle[aria-pressed="true"] .toggle__track{background:rgba(255,74,28,.32)}
.toggle[aria-pressed="true"] .toggle__thumb{background:var(--accent);transform:translateX(13px)}
.toggle__label b{color:var(--text);font-weight:500}
.toggle__label{white-space:nowrap}

/* =============== motion index rail =============== */
.rail{
  position:fixed;right:calc(var(--gutter) - 8px);top:50%;transform:translateY(-50%);
  z-index:40;pointer-events:none;
}
.rail ol{list-style:none;margin:0;padding:0;display:grid;gap:11px;justify-items:end}
.rail li{
  display:flex;align-items:center;gap:10px;
  font-size:11.5px;color:var(--text-dim);opacity:.42;
}
.rail i{font-family:var(--mono);font-size:9.5px;font-style:normal;order:2;
  width:18px;text-align:right}
.rail span{
  order:1;max-width:0;overflow:hidden;white-space:nowrap;
  opacity:0;
}
.rail li.is-active{opacity:1;color:var(--text)}
.rail li.is-active i{color:var(--accent)}
.rail li.is-active span{max-width:150px;opacity:1}
/* the rail is decorative — it is hidden long before it could overlap copy */
@media (max-width:1439px){.rail{display:none}}

/* =============== shared type =============== */
.eyebrow,.kicker{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--text-dim);margin:0 0 18px;display:flex;align-items:center;gap:9px;
}
.eyebrow__pip{width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}
.h2{
  font-family:var(--display);font-weight:800;
  font-size:clamp(30px,4.6vw,58px);line-height:1.04;letter-spacing:-.035em;
  margin:0 0 20px;
}
.h2--xl{font-size:clamp(38px,7vw,88px)}
.h2 em{font-style:normal;color:var(--accent)}
.section__lede{color:var(--text-dim);max-width:54ch;margin:0;font-size:1.03em}
code{font-family:var(--mono);font-size:.82em;color:var(--accent-2)}

.section{
  position:relative;z-index:2;
  max-width:var(--maxw);margin:0 auto;
  padding:clamp(88px,13vh,160px) var(--gutter);
}
.section__head{margin-bottom:clamp(44px,6vw,72px);max-width:var(--maxw)}
.section__head--center{text-align:center;margin-inline:auto;max-width:640px}
.section__head--center .kicker{justify-content:center}
.section__head--center .section__lede{margin-inline:auto}

/* =============== buttons =============== */
.btn{
  position:relative;display:inline-flex;align-items:center;gap:10px;
  padding:14px 26px;border-radius:999px;border:1px solid transparent;
  font-family:var(--body);font-size:14.5px;font-weight:500;letter-spacing:.005em;
  cursor:pointer;
}
.btn--primary{background:var(--text);color:var(--ink)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:rgba(232,227,216,.34)}
.btn--xl{
  padding:22px 46px;font-size:17px;
  background:linear-gradient(120deg,var(--accent),var(--accent-2));color:#180a04;font-weight:600;
}
.btn > *{position:relative;z-index:1}

/* =============== hero =============== */
.hero{
  position:relative;z-index:2;
  min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  max-width:var(--maxw);margin:0 auto;
  padding:104px var(--gutter) 58px;
}
.hero__layers{position:absolute;inset:0;overflow:hidden;pointer-events:none}
/* centred with inset+margin rather than translate(-50%,-50%), so the
   parallax engine owns `transform` outright and never has to re-state it */
.hero__ring{
  position:absolute;inset:0;margin:auto;
  border-radius:50%;border:1px solid var(--line);
  aspect-ratio:1;
}
.hero__ring--1{width:min(70vw,720px)}
.hero__ring--2{width:min(100vw,1040px);border-color:rgba(232,227,216,.07)}
.hero__ring--3{width:min(132vw,1400px);border-color:rgba(232,227,216,.045)}

.hero__inner{position:relative;max-width:900px}
.hero__title{
  font-family:var(--display);font-weight:800;
  font-size:clamp(38px,7.2vw,92px);line-height:.98;letter-spacing:-.042em;
  margin:0 0 24px;
}
.hero__title .line{display:block;overflow:hidden;padding-bottom:.06em}
.hero__title .line > span{display:block}
.hero__title em{font-style:normal;background:linear-gradient(100deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero__lede{max-width:55ch;color:var(--text-dim);font-size:clamp(15.5px,1.1vw,17.5px);margin:0 0 30px}
.hero__lede em{font-style:italic;color:var(--text)}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:clamp(26px,4.4vh,50px)}
.hero__facts{display:flex;flex-wrap:wrap;gap:0;margin:0;border-top:1px solid var(--line);padding-top:20px}
.hero__facts > div{padding-right:44px;margin-right:44px;border-right:1px solid var(--line)}
.hero__facts > div:last-child{border-right:0;padding-right:0;margin-right:0}
.hero__facts dt{font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--text-dim)}
.hero__facts dd{margin:5px 0 0;font-size:15px;color:var(--text)}
.hero__cue{position:absolute;right:var(--gutter);bottom:30px;width:1px;height:56px;overflow:hidden}
.hero__cue-line{display:block;width:1px;height:100%;background:linear-gradient(180deg,transparent,var(--accent))}

/* =============== marquee =============== */
.marquee{
  position:relative;z-index:2;overflow:hidden;
  border-block:1px solid var(--line);padding:16px 0;
  background:rgba(12,14,18,.5);
}
.marquee__track{display:flex;gap:34px;align-items:center;width:max-content;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-dim)}
.marquee__track i{color:var(--accent);font-style:normal;font-size:8px}

/* =============== cards =============== */
.cards{overflow-x:clip;display:grid;grid-template-columns:repeat(auto-fit,minmax(248px,1fr));gap:18px}
.card{
  position:relative;overflow:hidden;
  padding:30px 26px 26px;border-radius:var(--radius);
  background:linear-gradient(170deg,rgba(255,255,255,.055),rgba(255,255,255,.018));
  border:1px solid var(--line);
}
.card__glow{
  position:absolute;width:260px;height:260px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(255,74,28,.22),transparent 65%);
  opacity:0;left:0;top:0;margin:-130px 0 0 -130px;
}
.card__idx{font-family:var(--mono);font-size:10px;color:var(--accent);letter-spacing:.14em}
.card h3{font-family:var(--display);font-weight:700;font-size:20px;letter-spacing:-.02em;margin:14px 0 10px}
.card p{margin:0 0 18px;font-size:14.2px;color:var(--text-dim);line-height:1.58}
.card code{display:inline-block;padding:4px 9px;border-radius:6px;background:rgba(255,74,28,.1);
  border:1px solid rgba(255,74,28,.2);font-size:11px}

/* =============== split =============== */
/* `clip` (not `hidden`) contains the sideways travel of the reveal
   pre-states without turning the section into a scroll container. */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,72px);align-items:center;
  overflow-x:clip}
/* a grid/flex item defaults to min-width:auto, so the wide <pre> inside the
   code panel was able to push the whole page sideways on a phone */
.split > *,.cards > *,.stats > *,.panel{min-width:0}
@media (max-width:900px){.split{grid-template-columns:1fr}}
.split__body p{color:var(--text-dim);max-width:46ch}
.panel{
  border-radius:var(--radius);border:1px solid var(--line);overflow:hidden;
  background:rgba(8,10,14,.82);
}
.panel__bar{display:flex;align-items:center;gap:7px;padding:11px 14px;border-bottom:1px solid var(--line);
  font-family:var(--mono);font-size:10px;color:var(--text-dim)}
.panel__bar i{width:8px;height:8px;border-radius:50%;background:rgba(232,227,216,.18)}
.panel__bar i:first-child{background:rgba(255,74,28,.55)}
.panel__bar span{margin-left:8px}
.panel__code{margin:0;padding:22px 20px;overflow-x:auto;max-width:100%;
  font-family:var(--mono);font-size:clamp(10px,2.2vw,11.4px);line-height:2;color:var(--text-dim);
  -webkit-overflow-scrolling:touch}
.panel__code b{color:var(--text);font-weight:400}
.panel__code u{color:var(--accent-2);text-decoration:none}
.panel__note{margin:0;padding:14px 20px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-dim)}
.ticks{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:13px}
.ticks li{position:relative;padding-left:26px;font-size:14.4px;color:var(--text-dim)}
.ticks li::before{
  content:'';position:absolute;left:0;top:.62em;width:11px;height:2px;background:var(--accent);
}

/* =============== depth =============== */
.depth{position:relative;z-index:2;overflow:hidden;
  padding:clamp(120px,20vh,220px) var(--gutter);
  border-block:1px solid var(--line);
  background:linear-gradient(180deg,rgba(19,23,32,.75),rgba(7,8,10,.4))}
.depth__scene{position:absolute;inset:-18% 0;pointer-events:none}
.depth__layer{position:absolute;border-radius:50%}
.depth__layer--far{width:44vw;height:44vw;left:4%;top:4%;
  background:radial-gradient(circle at 34% 34%,rgba(255,180,87,.13),transparent 62%)}
.depth__layer--mid{width:30vw;height:30vw;right:6%;top:22%;
  background:radial-gradient(circle at 60% 40%,rgba(255,74,28,.2),transparent 62%)}
.depth__layer--near{width:16vw;height:16vw;left:64%;bottom:10%;border:1px solid rgba(255,74,28,.28);
  background:radial-gradient(circle,rgba(255,74,28,.07),transparent 70%)}
.depth__grid{
  position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(232,227,216,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(232,227,216,.05) 1px,transparent 1px);
  background-size:78px 78px;
  mask-image:radial-gradient(ellipse 70% 60% at 50% 50%,#000,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 50%,#000,transparent 78%);
}
.depth__content{position:relative;max-width:var(--maxw);margin:0 auto}
.depth__lede{max-width:52ch;color:var(--text-dim);margin:0 0 30px}
.depth__legend{display:flex;flex-wrap:wrap;gap:9px}
.depth__legend span{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;
  padding:7px 13px;border-radius:999px;border:1px solid var(--line);color:var(--text-dim);
}

/* =============== field (light surface — the "light shift") =============== */
.field{background:var(--paper);color:#17140f;border-radius:0;max-width:none;width:100%}
.field .kicker,.field .section__lede{color:#6d6656}
.field .h2 em{color:var(--accent)}
.field__stage{
  position:relative;max-width:var(--maxw);margin:0 auto;
  aspect-ratio:16/8;min-height:280px;border-radius:var(--radius);overflow:hidden;
  background:#e8e1d3;border:1px solid rgba(23,20,15,.1);
}
@media (max-width:640px){.field__stage{aspect-ratio:4/5}}
#field-canvas{position:absolute;inset:0;width:100%;height:100%;touch-action:pan-y}
.field__hint{
  position:absolute;left:16px;bottom:12px;margin:0;
  font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:rgba(23,20,15,.42);
}

/* =============== numbers =============== */
.stats{overflow-x:clip;display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.stat{background:var(--ink);padding:30px 26px 28px}
.stat b{
  display:block;font-family:var(--display);font-weight:800;
  font-size:clamp(38px,5.4vw,62px);line-height:1;letter-spacing:-.045em;
  color:var(--text);margin-bottom:12px;font-variant-numeric:tabular-nums;
}
.stat span{font-size:13.4px;color:var(--text-dim);line-height:1.55;display:block}

/* =============== cta =============== */
.cta{position:relative;z-index:2;text-align:center;padding:clamp(110px,18vh,190px) var(--gutter)}
.cta__inner{max-width:720px;margin:0 auto}
.cta__inner > p{color:var(--text-dim);max-width:48ch;margin:0 auto 38px}
.cta__actions{display:flex;justify-content:center;margin-bottom:34px}
.cta__foot{font-size:12.8px;color:var(--text-dim);opacity:.72;max-width:46ch;margin:0 auto}

/* =============== footer =============== */
.foot{
  position:relative;z-index:2;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding:26px var(--gutter);border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-dim);
}
.foot p{margin:0}
.foot__meta{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em}

@media (max-width:760px){
  .nav__links{display:none}
  .hero__facts > div{padding-right:22px;margin-right:22px}
  .toggle__label{display:none}
  .toggle{padding:5px 7px}
}