/* ==========================================================================
   Fullstay — Design System
   Monochrome. Editorial. Framer-adjacent.
   ========================================================================== */

:root{
  --ink:#0A0A0A;
  --ink-80:rgba(10,10,10,.80);
  --ink-60:rgba(10,10,10,.58);
  --ink-40:rgba(10,10,10,.38);
  --ink-15:rgba(10,10,10,.14);
  --ink-08:rgba(10,10,10,.075);
  --ink-04:rgba(10,10,10,.035);
  --paper:#FFFFFF;
  --bone:#F4F3F1;
  --bone-2:#EDEBE8;
  --paper-80:rgba(255,255,255,.80);
  --paper-60:rgba(255,255,255,.60);
  --paper-40:rgba(255,255,255,.38);
  --paper-15:rgba(255,255,255,.16);

  --maxw:1360px;
  --gut:clamp(20px,4.5vw,72px);
  --radius:2px;
  --radius-lg:4px;

  --ease:cubic-bezier(.22,1,.36,1);
  --ease-io:cubic-bezier(.65,.05,.36,1);

  --f-display:"Inter Tight","Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  --f-body:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--f-body);
  font-size:17px;
  line-height:1.62;
  font-weight:400;
  letter-spacing:-0.011em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
body.is-locked{overflow:hidden}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
::selection{background:var(--ink);color:var(--paper)}

/* ---------- Typography ---------- */
h1,h2,h3,h4,h5{
  font-family:var(--f-display);
  font-weight:500;
  letter-spacing:-0.035em;
  line-height:1.03;
  margin:0;
  text-wrap:balance;
}
.h-xxl{font-size:clamp(2.9rem,7.6vw,7.2rem);letter-spacing:-0.045em;line-height:.95}
.h-xl {font-size:clamp(2.3rem,5.1vw,4.6rem);letter-spacing:-0.04em;line-height:1.0}
.h-lg {font-size:clamp(1.9rem,3.5vw,3.1rem);letter-spacing:-0.035em;line-height:1.06}
.h-md {font-size:clamp(1.4rem,2.1vw,1.95rem);letter-spacing:-0.03em;line-height:1.14}
.h-sm {font-size:clamp(1.12rem,1.4vw,1.32rem);letter-spacing:-0.024em;line-height:1.26}

p{margin:0 0 1.15em}
p:last-child{margin-bottom:0}

.lede{font-size:clamp(1.08rem,1.55vw,1.42rem);line-height:1.5;color:var(--ink-60);letter-spacing:-0.018em;font-weight:400}
.lede-invert{color:var(--paper-60)}
.body-lg{font-size:1.06rem;line-height:1.68;color:var(--ink-60)}
.muted{color:var(--ink-60)}
.small{font-size:.925rem;line-height:1.6}

.eyebrow{
  font-family:var(--f-mono);
  font-size:.688rem;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--ink-40);
  display:flex;align-items:center;gap:.7em;
  margin:0 0 1.6rem;
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;flex:none;opacity:.55}
.eyebrow-invert{color:var(--paper-40)}
.eyebrow-center{justify-content:center}

.num{font-family:var(--f-mono);font-size:.688rem;letter-spacing:.14em;color:var(--ink-40)}

/* ---------- Layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gut);width:100%}
.wrap-narrow{max-width:900px;margin:0 auto;padding-inline:var(--gut);width:100%}
.wrap-wide{max-width:1680px;margin:0 auto;padding-inline:var(--gut);width:100%}
.bleed{width:100%}

section{position:relative}
.sec{padding-block:clamp(72px,10vw,160px)}
.sec-sm{padding-block:clamp(52px,6vw,96px)}
.sec-lg{padding-block:clamp(96px,13vw,210px)}

.ink-bg{background:var(--ink);color:var(--paper)}
.ink-bg .muted,.ink-bg .lede{color:var(--paper-60)}
.ink-bg .eyebrow{color:var(--paper-40)}
.bone-bg{background:var(--bone)}

.grid{display:grid;gap:clamp(20px,2.4vw,34px)}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
.g-12{grid-template-columns:repeat(12,1fr)}
.split{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:clamp(32px,5.5vw,96px);align-items:start}
.split-head{grid-template-columns:minmax(0,1.14fr) minmax(0,.86fr)}
.split-even{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,80px);align-items:center}

.sec-head{max-width:820px;margin-bottom:clamp(40px,5.5vw,80px)}
.sec-head-center{margin-inline:auto;text-align:center}
.sec-head-center .eyebrow{justify-content:center}
.sec-head p{margin-top:1.3rem}

.rule{height:1px;background:var(--ink-15);border:0;margin:0}
.ink-bg .rule{background:var(--paper-15)}

/* ---------- Buttons ---------- */
.btn{
  --bg:var(--ink); --fg:var(--paper); --bd:var(--ink);
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:.62em;
  padding:1.02em 1.85em;
  background:var(--bg);color:var(--fg);border:1px solid var(--bd);
  border-radius:100px;
  font-family:var(--f-body);font-size:.925rem;font-weight:500;letter-spacing:-0.012em;
  cursor:pointer;overflow:hidden;isolation:isolate;
  transition:color .45s var(--ease),border-color .45s var(--ease),background .45s var(--ease),transform .45s var(--ease);
  -webkit-appearance:none;appearance:none;
}
.btn::after{
  content:"";position:absolute;inset:0;z-index:-1;background:var(--fg);
  transform:translateY(101%);transition:transform .55s var(--ease);border-radius:inherit;
}
.btn:hover::after{transform:translateY(0)}
.btn:hover{color:var(--bg)}
.btn:active{transform:scale(.985)}
.btn:focus-visible{outline:2px solid currentColor;outline-offset:3px}
.btn svg{transition:transform .45s var(--ease);flex:none}
.btn:hover svg{transform:translateX(4px)}

.btn-ghost{--bg:transparent;--fg:var(--ink);--bd:var(--ink-15)}
.btn-ghost:hover{color:var(--paper);border-color:var(--ink)}
.btn-ghost::after{background:var(--ink)}

.btn-invert{--bg:var(--paper);--fg:var(--ink);--bd:var(--paper)}
.btn-ghost-invert{--bg:transparent;--fg:var(--paper);--bd:var(--paper-15)}
.btn-ghost-invert:hover{color:var(--ink);border-color:var(--paper)}
.btn-ghost-invert::after{background:var(--paper)}

.btn-sm{padding:.72em 1.32em;font-size:.855rem}
.btn-lg{padding:1.18em 2.3em;font-size:1rem}

.link-u{
  display:inline-flex;align-items:center;gap:.5em;
  font-weight:500;font-size:.94rem;letter-spacing:-0.012em;
  padding-bottom:3px;background-image:linear-gradient(currentColor,currentColor);
  background-size:100% 1px;background-repeat:no-repeat;background-position:0 100%;
  transition:background-size .5s var(--ease),gap .35s var(--ease);
}
.link-u:hover{background-size:0% 1px;gap:.85em}
.link-u svg{transition:transform .4s var(--ease)}
.link-u:hover svg{transform:translateX(4px)}

/* ---------- Header ---------- */
.hdr{
  position:fixed;inset:0 0 auto 0;z-index:900;
  padding-block:20px;
  transition:padding .5s var(--ease),background .5s var(--ease),box-shadow .5s var(--ease),backdrop-filter .5s var(--ease);
  color:var(--paper);
}
.hdr-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.hdr.is-solid{
  padding-block:12px;background:rgba(255,255,255,.82);backdrop-filter:blur(18px) saturate(1.5);
  -webkit-backdrop-filter:blur(18px) saturate(1.5);
  box-shadow:0 1px 0 var(--ink-08);color:var(--ink);
}
.hdr.is-hidden{transform:translateY(-102%)}
body.no-hero .hdr{
  color:var(--ink);background:rgba(255,255,255,.86);
  backdrop-filter:blur(18px) saturate(1.5);-webkit-backdrop-filter:blur(18px) saturate(1.5);
  box-shadow:0 1px 0 var(--ink-08);
}
.hdr{transform:translateY(0);transition:transform .55s var(--ease),padding .5s var(--ease),background .5s var(--ease),box-shadow .5s var(--ease),color .4s var(--ease)}
.hdr.on-light{color:var(--ink)}

.logo{display:inline-flex;align-items:baseline;gap:.42em;font-family:var(--f-display);font-weight:600;font-size:1.32rem;letter-spacing:-0.055em}
.logo .dot{width:6px;height:6px;border-radius:50%;background:currentColor;display:inline-block;margin-left:-.18em}
.logo small{font-family:var(--f-mono);font-size:.5rem;letter-spacing:.18em;text-transform:uppercase;opacity:.45;font-weight:400;transform:translateY(-.55em)}

.nav{display:flex;align-items:center;gap:4px}
.nav a,.nav button.navlink{
  position:relative;display:inline-flex;align-items:center;gap:.4em;
  padding:.55em .9em;font-size:.905rem;font-weight:450;letter-spacing:-0.012em;
  background:none;border:0;cursor:pointer;opacity:.82;transition:opacity .3s var(--ease);
}
.nav a:hover,.nav button.navlink:hover{opacity:1}
.nav a::after{
  content:"";position:absolute;left:.9em;right:.9em;bottom:.34em;height:1px;background:currentColor;
  transform:scaleX(0);transform-origin:0 50%;transition:transform .45s var(--ease);
}
.nav a:hover::after{transform:scaleX(1)}
.hdr-cta{margin-left:14px}

.has-mega{position:static}
.mega{
  position:absolute;left:0;right:0;top:100%;
  background:var(--paper);color:var(--ink);
  border-top:1px solid var(--ink-08);box-shadow:0 30px 60px -30px rgba(0,0,0,.22);
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .38s var(--ease),transform .38s var(--ease),visibility .38s;
  padding:44px 0 40px;
}
.has-mega:hover .mega,.mega:hover,.mega.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.mega-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr .9fr;gap:44px}
.mega h5{font-family:var(--f-mono);font-size:.64rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-40);font-weight:500;margin-bottom:16px}
.mega ul{list-style:none;margin:0;padding:0;display:grid;gap:1px}
.mega ul a{display:flex;align-items:baseline;gap:.5em;padding:.42em 0;font-size:.94rem;opacity:1;font-weight:450}
.mega ul a::after{display:none}
.mega ul a span.t{background-image:linear-gradient(currentColor,currentColor);background-size:0% 1px;background-repeat:no-repeat;background-position:0 100%;transition:background-size .45s var(--ease);padding-bottom:2px}
.mega ul a:hover span.t{background-size:100% 1px}
.mega ul a em{font-style:normal;font-family:var(--f-mono);font-size:.6rem;letter-spacing:.1em;color:var(--ink-40);text-transform:uppercase}
.mega-feature{background:var(--bone);padding:26px;border-radius:var(--radius-lg)}
.mega-feature p{font-size:.9rem;color:var(--ink-60);margin-bottom:1.1em}

.burger{display:none;width:44px;height:44px;align-items:center;justify-content:center;background:none;border:0;cursor:pointer;margin-left:6px}
.burger span{display:block;width:20px;height:1.5px;background:currentColor;position:relative;transition:background .3s}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:20px;height:1.5px;background:currentColor;transition:transform .45s var(--ease)}
.burger span::before{top:-6px}.burger span::after{top:6px}
body.menu-open .burger span{background:transparent}
body.menu-open .burger span::before{transform:translateY(6px) rotate(45deg)}
body.menu-open .burger span::after{transform:translateY(-6px) rotate(-45deg)}

.mobnav{
  position:fixed;inset:0;z-index:880;background:var(--ink);color:var(--paper);
  padding:104px var(--gut) 40px;overflow-y:auto;
  clip-path:inset(0 0 100% 0);transition:clip-path .7s var(--ease);
}
body.menu-open .mobnav{clip-path:inset(0 0 0 0)}
.mobnav a{display:block;font-family:var(--f-display);font-size:clamp(1.6rem,7vw,2.4rem);letter-spacing:-0.04em;padding:.28em 0;border-bottom:1px solid var(--paper-15);opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
body.menu-open .mobnav a{opacity:1;transform:none}
.mobnav .sub{font-size:1rem;font-family:var(--f-body);letter-spacing:-0.01em;color:var(--paper-60);padding:.42em 0;border-bottom:1px solid rgba(255,255,255,.07)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;overflow:hidden;background:var(--ink);color:var(--paper)}
.hero-media{position:absolute;inset:0;z-index:0;overflow:hidden}
.hero-media img{
  width:100%;height:118%;object-fit:cover;
  filter:grayscale(1) contrast(1.06) brightness(.78);
  transform:scale(1.06);will-change:transform;
}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,10,10,.62) 0%,rgba(10,10,10,.22) 34%,rgba(10,10,10,.55) 72%,rgba(10,10,10,.88) 100%);
}
.hero-inner{position:relative;z-index:2;width:100%;padding-block:clamp(120px,15vh,170px) clamp(40px,6vh,62px)}
.hero h1{max-width:16ch}
.hero .lede{max-width:52ch;margin-top:1.7rem;color:var(--paper-60)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:2.4rem}
.hero-meta{display:flex;flex-wrap:wrap;gap:clamp(20px,4vw,54px);margin-top:clamp(44px,7vh,86px);padding-top:26px;border-top:1px solid var(--paper-15)}
.hero-meta div{max-width:200px}
.hero-meta strong{display:block;font-family:var(--f-display);font-size:1.9rem;font-weight:500;letter-spacing:-0.04em;line-height:1}
.hero-meta strong span{font-size:inherit;color:inherit;display:inline;margin:0}
.hero-meta>div>span{font-size:.83rem;color:var(--paper-60);display:block;margin-top:.45em;line-height:1.45}

.scroll-cue{position:absolute;right:var(--gut);bottom:clamp(40px,6vh,62px);z-index:3;display:flex;align-items:center;gap:.7em;font-family:var(--f-mono);font-size:.62rem;letter-spacing:.18em;text-transform:uppercase;color:var(--paper-40)}
.scroll-cue i{display:block;width:1px;height:42px;background:linear-gradient(var(--paper-40),transparent);position:relative;overflow:hidden}
.scroll-cue i::after{content:"";position:absolute;inset:0;background:var(--paper);animation:cue 2.4s var(--ease-io) infinite}
@keyframes cue{0%{transform:translateY(-100%)}60%,100%{transform:translateY(100%)}}
@media (max-width:900px){.scroll-cue{display:none}}

/* ---------- Marquee ---------- */
.marquee{overflow:hidden;position:relative;padding-block:26px;user-select:none;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 9%,#000 91%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 9%,#000 91%,transparent)}
.marquee-track{display:flex;width:max-content;animation:slide 46s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes slide{to{transform:translateX(-50%)}}
.marquee-item{display:inline-flex;align-items:center;gap:.65em;padding-inline:clamp(20px,2.6vw,42px);
  font-family:var(--f-display);font-size:clamp(1.05rem,1.6vw,1.55rem);font-weight:500;letter-spacing:-0.035em;
  color:var(--ink-40);white-space:nowrap;transition:color .4s var(--ease)}
.marquee-item:hover{color:var(--ink)}
.marquee-item::before{content:"";width:5px;height:5px;border-radius:50%;background:currentColor;opacity:.45}
.ink-bg .marquee-item{color:var(--paper-40)}
.ink-bg .marquee-item:hover{color:var(--paper)}

/* ---------- Reveal ---------- */
[data-rv]{opacity:0;transform:translateY(26px);transition:opacity .95s var(--ease),transform .95s var(--ease)}
[data-rv].in{opacity:1;transform:none}
[data-rv-mask]{clip-path:inset(0 0 100% 0);transition:clip-path 1.15s var(--ease)}
[data-rv-mask].in{clip-path:inset(0 0 0 0)}
[data-rv-img]{overflow:hidden}
[data-rv-img] img{transform:scale(1.14);transition:transform 1.5s var(--ease),filter .7s var(--ease)}
[data-rv-img].in img{transform:scale(1)}
@media (prefers-reduced-motion:reduce){
  [data-rv],[data-rv-mask]{opacity:1!important;transform:none!important;clip-path:none!important}
  [data-rv-img] img{transform:none!important}
  .marquee-track{animation:none}
}

/* ---------- Cards ---------- */
.card{
  position:relative;background:var(--paper);border:1px solid var(--ink-15);border-radius:var(--radius-lg);
  padding:clamp(24px,2.6vw,38px);display:flex;flex-direction:column;gap:14px;
  transition:border-color .5s var(--ease),transform .5s var(--ease),box-shadow .5s var(--ease);
  overflow:hidden;
}
.card:hover{border-color:var(--ink);transform:translateY(-3px);box-shadow:0 24px 50px -34px rgba(0,0,0,.35)}
.card .num{margin-bottom:6px}
.card p{color:var(--ink-60);font-size:.965rem;line-height:1.62}
.card-link::after{content:"";position:absolute;inset:0}
.card .link-u{align-self:flex-start}
.ink-bg .card{background:transparent;border-color:var(--paper-15)}
.ink-bg .card:hover{border-color:var(--paper)}
.ink-bg .card p{color:var(--paper-60)}

.pain-card{border:0;border-top:1px solid var(--ink-15);border-radius:0;padding:30px 0 0;background:none}
.pain-card:hover{transform:none;box-shadow:none;border-color:var(--ink-15)}
.pain-card .ico{width:30px;height:30px;margin-bottom:12px;opacity:.85}
.ink-bg .pain-card{border-top-color:var(--paper-15);background:none}

/* platform tile */
.ptile{
  position:relative;display:flex;flex-direction:column;justify-content:space-between;gap:28px;
  min-height:190px;padding:26px;border:1px solid var(--ink-15);border-radius:var(--radius-lg);
  background:var(--paper);overflow:hidden;
  transition:color .5s var(--ease),border-color .5s var(--ease),transform .5s var(--ease);
}
.ptile::before{content:"";position:absolute;inset:0;background:var(--ink);transform:translateY(100%);transition:transform .6s var(--ease);z-index:0}
.ptile:hover::before{transform:translateY(0)}
.ptile:hover{color:var(--paper);border-color:var(--ink)}
.ptile>*{position:relative;z-index:1}
.ptile .pname{font-family:var(--f-display);font-size:1.42rem;font-weight:500;letter-spacing:-0.038em;line-height:1.05}
.ptile .pdesc{font-size:.845rem;line-height:1.5;color:var(--ink-60);transition:color .5s var(--ease)}
.ptile:hover .pdesc{color:var(--paper-60)}
.ptile .parrow{display:flex;align-items:center;justify-content:space-between;font-family:var(--f-mono);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-40);transition:color .5s var(--ease)}
.ptile:hover .parrow{color:var(--paper-60)}
.ptile .parrow svg{transition:transform .5s var(--ease)}
.ptile:hover .parrow svg{transform:translate(4px,-4px)}
.ptile[data-tier="1"] .pname::after{content:"";display:inline-block;width:5px;height:5px;border-radius:50%;background:currentColor;margin-left:.4em;vertical-align:middle;opacity:.4}

/* ---------- Media ---------- */
.figure{position:relative;overflow:hidden;border-radius:var(--radius-lg);background:var(--bone)}
.figure img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.04);transition:filter .8s var(--ease),transform 1.4s var(--ease)}
.figure:hover img{filter:grayscale(0) contrast(1)}
.figure.tall{aspect-ratio:3/4}
.figure.wide{aspect-ratio:16/10}
.figure.sq{aspect-ratio:1/1}
.figure.cine{aspect-ratio:21/9}
.figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:22px;color:var(--paper);
  background:linear-gradient(transparent,rgba(10,10,10,.72));
  font-size:.86rem;letter-spacing:-0.01em;
  display:flex;justify-content:space-between;align-items:flex-end;gap:16px;
}
.figure figcaption em{font-style:normal;font-family:var(--f-mono);font-size:.6rem;letter-spacing:.13em;text-transform:uppercase;opacity:.7}

.bleed-media{position:relative;height:clamp(360px,72vh,760px);overflow:hidden}
.bleed-media img{width:100%;height:126%;object-fit:cover;filter:grayscale(1) contrast(1.05) brightness(.82);will-change:transform}
.bleed-media .overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,10,10,.42),rgba(10,10,10,.62));display:flex;align-items:center}
.bleed-media .overlay .wrap{color:var(--paper)}

/* ---------- Stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--paper-15)}
.stat{padding:clamp(26px,3.4vw,46px) clamp(16px,2vw,32px) 0;border-right:1px solid var(--paper-15)}
.stat:last-child{border-right:0}
.stat b{display:block;font-family:var(--f-display);font-size:clamp(2.4rem,5.2vw,4.4rem);font-weight:500;letter-spacing:-0.05em;line-height:.94}
.stat span{display:block;margin-top:.85em;font-size:.885rem;line-height:1.5;color:var(--paper-60);max-width:26ch}
.stat i{font-style:normal;font-size:.5em;vertical-align:super;letter-spacing:-0.02em}

/* ---------- Process (sticky) ---------- */
.proc{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:clamp(36px,6vw,110px);align-items:start}
.proc-sticky{position:sticky;top:120px}
.proc-steps{display:grid}
.proc-step{padding:clamp(30px,3.6vw,52px) 0;border-top:1px solid var(--ink-15);display:grid;grid-template-columns:56px 1fr;gap:clamp(16px,2vw,28px)}
.proc-step:last-child{border-bottom:1px solid var(--ink-15)}
.proc-step .num{padding-top:.55em}
.proc-step h3{margin-bottom:.55rem}
.proc-step p{color:var(--ink-60);font-size:.985rem;margin:0}
.proc-step ul{margin:1.1em 0 0;padding:0;list-style:none;display:grid;gap:.42em}
.proc-step li{font-size:.9rem;color:var(--ink-60);padding-left:1.2em;position:relative}
.proc-step li::before{content:"";position:absolute;left:0;top:.62em;width:6px;height:1px;background:var(--ink-40)}

/* ---------- Accordion ---------- */
.acc{border-top:1px solid var(--ink-15)}
.acc-item{border-bottom:1px solid var(--ink-15)}
.acc-btn{width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:clamp(20px,2.2vw,30px) 0;background:none;border:0;cursor:pointer;text-align:left;
  font-family:var(--f-display);font-size:clamp(1.02rem,1.5vw,1.28rem);font-weight:500;letter-spacing:-0.028em;line-height:1.3}
.acc-ico{flex:none;width:20px;height:20px;position:relative}
.acc-ico::before,.acc-ico::after{content:"";position:absolute;background:currentColor;transition:transform .5s var(--ease),opacity .4s var(--ease)}
.acc-ico::before{left:0;top:9.5px;width:20px;height:1.5px}
.acc-ico::after{left:9.5px;top:0;width:1.5px;height:20px}
.acc-item.open .acc-ico::after{transform:scaleY(0);opacity:0}
.acc-panel{overflow:hidden;height:0;transition:height .6s var(--ease)}
.acc-panel-in{padding:0 0 clamp(22px,2.4vw,32px);max-width:70ch;color:var(--ink-60);font-size:.99rem}
.ink-bg .acc,.ink-bg .acc-item{border-color:var(--paper-15)}
.ink-bg .acc-panel-in{color:var(--paper-60)}

/* ---------- Footer ---------- */
.ftr{background:var(--ink);color:var(--paper);padding-top:clamp(64px,8vw,110px)}
.ftr-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1fr;gap:clamp(28px,3vw,44px);padding-bottom:clamp(48px,6vw,80px)}
.ftr h5{font-family:var(--f-mono);font-size:.63rem;letter-spacing:.16em;text-transform:uppercase;color:var(--paper-40);font-weight:500;margin-bottom:16px}
.ftr ul{list-style:none;margin:0;padding:0;display:grid;gap:.5em}
.ftr ul a{font-size:.9rem;color:var(--paper-60);transition:color .35s var(--ease)}
.ftr ul a:hover{color:var(--paper)}
.ftr-brand p{max-width:34ch;color:var(--paper-60);font-size:.94rem;margin-top:1.2rem}
.ftr-bottom{display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between;align-items:center;
  padding-block:26px;border-top:1px solid var(--paper-15);font-size:.82rem;color:var(--paper-40)}
.ftr-bottom nav{display:flex;gap:22px;flex-wrap:wrap}
.ftr-wordmark{font-family:var(--f-display);font-weight:600;letter-spacing:-0.06em;
  font-size:clamp(4rem,17vw,15rem);line-height:.78;color:transparent;
  -webkit-text-stroke:1px rgba(255,255,255,.16);
  padding-bottom:.06em;user-select:none;white-space:nowrap;overflow:hidden}

/* ---------- CTA band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--ink);color:var(--paper)}
.cta-band .bgimg{position:absolute;inset:0;opacity:.26}
.cta-band .bgimg img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.1)}
.cta-band .wrap{position:relative;z-index:1}
.cta-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:2rem}
.chip{display:inline-flex;align-items:center;gap:.5em;padding:.5em 1em;border:1px solid var(--paper-15);border-radius:100px;font-size:.82rem;color:var(--paper-60)}
.chip svg{opacity:.6}

/* ---------- Breadcrumbs ---------- */
.crumbs{display:flex;flex-wrap:wrap;gap:.5em;align-items:center;font-family:var(--f-mono);font-size:.63rem;letter-spacing:.13em;text-transform:uppercase;color:var(--ink-40);margin-bottom:1.8rem}
.crumbs a:hover{color:var(--ink)}
.crumbs span{opacity:.4}
.crumbs-invert{color:var(--paper-40)}
.crumbs-invert a:hover{color:var(--paper)}

/* ---------- Quiz ---------- */
.quiz-shell{position:relative;border:1px solid var(--ink-15);border-radius:var(--radius-lg);background:var(--paper);overflow:hidden}
.quiz-bar{height:2px;background:var(--ink-08);position:relative}
.quiz-bar i{position:absolute;inset:0 auto 0 0;width:0;background:var(--ink);transition:width .7s var(--ease)}
.quiz-head{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px clamp(22px,3vw,44px);border-bottom:1px solid var(--ink-08)}
.quiz-head .num{margin:0}
.quiz-body{padding:clamp(28px,4vw,56px) clamp(22px,3vw,44px)}
.quiz-step{display:none;animation:qin .55s var(--ease) both}
.quiz-step.active{display:block}
@keyframes qin{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.quiz-q{font-family:var(--f-display);font-size:clamp(1.5rem,2.9vw,2.35rem);font-weight:500;letter-spacing:-0.035em;line-height:1.1;margin-bottom:.6rem}
.quiz-help{color:var(--ink-60);font-size:.955rem;margin-bottom:clamp(22px,2.6vw,34px);max-width:56ch}
.opts{display:grid;gap:10px}
.opts-2{grid-template-columns:repeat(2,1fr)}
.opts-3{grid-template-columns:repeat(3,1fr)}
.opt{
  position:relative;display:flex;align-items:center;gap:14px;
  padding:1.02em 1.25em;border:1px solid var(--ink-15);border-radius:var(--radius-lg);
  cursor:pointer;background:var(--paper);text-align:left;font-size:.975rem;letter-spacing:-0.012em;
  transition:border-color .35s var(--ease),background .35s var(--ease),color .35s var(--ease),transform .35s var(--ease);
}
.opt:hover{border-color:var(--ink-40);transform:translateY(-1px)}
.opt .tick{flex:none;width:18px;height:18px;border:1px solid var(--ink-15);border-radius:50%;position:relative;transition:border-color .3s,background .3s}
.opt .tick::after{content:"";position:absolute;inset:4px;border-radius:50%;background:var(--paper);transform:scale(0);transition:transform .3s var(--ease)}
.opt.sel{border-color:var(--ink);background:var(--ink);color:var(--paper)}
.opt.sel .tick{border-color:var(--paper);background:var(--paper)}
.opt.sel .tick::after{background:var(--ink);transform:scale(1)}
.opt .sub{display:block;font-size:.79rem;opacity:.55;margin-top:.15em}
.opt-body{min-width:0}

.field{display:grid;gap:7px;margin-bottom:16px}
.field label{font-family:var(--f-mono);font-size:.63rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-40)}
.field input,.field textarea,.field select{
  width:100%;padding:.92em 1.05em;border:1px solid var(--ink-15);border-radius:var(--radius-lg);
  background:var(--paper);font-family:inherit;font-size:.985rem;color:var(--ink);
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease);-webkit-appearance:none;appearance:none;
}
.field input:focus,.field textarea:focus,.field select:focus{outline:0;border-color:var(--ink);box-shadow:0 0 0 3px var(--ink-08)}
.field textarea{min-height:112px;resize:vertical}
.field.invalid input,.field.invalid textarea{border-color:#0A0A0A;box-shadow:0 0 0 3px rgba(10,10,10,.09)}
.field .err{font-size:.78rem;color:var(--ink);opacity:0;height:0;transition:opacity .3s}
.field.invalid .err{opacity:.75;height:auto}
.field-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}

.quiz-foot{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:20px clamp(22px,3vw,44px);border-top:1px solid var(--ink-08);background:var(--bone)}
.quiz-foot .hint{font-size:.8rem;color:var(--ink-60)}
.btn-back{background:none;border:0;cursor:pointer;font-size:.9rem;color:var(--ink-60);display:inline-flex;align-items:center;gap:.5em;transition:color .3s,gap .3s}
.btn-back:hover{color:var(--ink);gap:.75em}
.btn-back[hidden]{display:none}
.quiz-done{text-align:center;padding:clamp(44px,7vw,90px) clamp(22px,3vw,44px)}
.quiz-done .tickbig{width:56px;height:56px;border-radius:50%;border:1px solid var(--ink-15);display:grid;place-items:center;margin:0 auto 22px}
.summary{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.summary .chip{border-color:var(--ink-15);color:var(--ink-60)}

/* ---------- Data ---------- */
.dgrid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--ink-15);border-left:1px solid var(--ink-15)}
.dcell{padding:clamp(24px,3vw,42px);border-right:1px solid var(--ink-15);border-bottom:1px solid var(--ink-15);display:flex;flex-direction:column;gap:.55rem}
.dcell b{font-family:var(--f-display);font-size:clamp(2.2rem,4.4vw,3.5rem);font-weight:500;letter-spacing:-0.05em;line-height:.95}
.dcell b i{font-style:normal;font-size:.46em;vertical-align:super;letter-spacing:-0.02em;margin-left:.04em}
.dcell b i.unit{font-size:.42em;vertical-align:baseline;margin-left:.06em;letter-spacing:-0.01em;opacity:.72}
.dcell p{font-size:.94rem;line-height:1.55;color:var(--ink-60);margin:0}
.dcell .src{margin-top:auto;padding-top:1.1rem;font-family:var(--f-mono);font-size:.58rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-40)}
.ink-bg .dgrid{border-color:var(--paper-15)}
.ink-bg .dcell{border-color:var(--paper-15)}
.ink-bg .dcell p{color:var(--paper-60)}
.ink-bg .dcell .src{color:var(--paper-40)}

.dtable{width:100%;border-collapse:collapse;font-size:.95rem}
.dtable caption{text-align:left;font-family:var(--f-mono);font-size:.62rem;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-40);padding-bottom:14px}
.dtable th,.dtable td{text-align:left;padding:.95em 1em;border-bottom:1px solid var(--ink-15);vertical-align:top}
.dtable thead th{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-40);font-weight:500;border-bottom-color:var(--ink)}
.dtable tbody th{font-weight:500;letter-spacing:-0.015em;width:34%}
.dtable td.figure-cell{font-family:var(--f-display);font-size:1.15rem;font-weight:500;letter-spacing:-0.03em;white-space:nowrap;width:22%}
.dtable td:last-child{color:var(--ink-60);font-size:.9rem}
.dtable tbody tr:hover{background:var(--ink-04)}
.ink-bg .dtable th,.ink-bg .dtable td{border-bottom-color:var(--paper-15)}
.ink-bg .dtable thead th{color:var(--paper-40);border-bottom-color:var(--paper)}
.ink-bg .dtable td:last-child{color:var(--paper-60)}
.ink-bg .dtable tbody tr:hover{background:rgba(255,255,255,.04)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* ---------- Question / answer layer (visible, snippet-shaped) ---------- */
.qa{display:grid;gap:0;border-top:1px solid var(--ink-15)}
.qa-item{padding:clamp(26px,3vw,40px) 0;border-bottom:1px solid var(--ink-15);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);gap:clamp(18px,3vw,56px)}
.qa-item h3{font-size:clamp(1.05rem,1.55vw,1.34rem);letter-spacing:-0.028em;line-height:1.24;max-width:26ch}
.qa-answer>p:first-child{font-size:1.02rem;line-height:1.6;color:var(--ink);letter-spacing:-0.014em}
.qa-answer>p+p{font-size:.945rem;color:var(--ink-60);margin-top:.9em}
.ink-bg .qa,.ink-bg .qa-item{border-color:var(--paper-15)}
.ink-bg .qa-answer>p:first-child{color:var(--paper)}
.ink-bg .qa-answer>p+p{color:var(--paper-60)}
@media (max-width:860px){.qa-item{grid-template-columns:1fr;gap:14px}}

/* ---------- Disambiguation callout ---------- */
.callout{
  position:relative;border:1px solid var(--ink);border-radius:var(--radius-lg);
  padding:clamp(26px,3.2vw,46px);display:grid;grid-template-columns:auto minmax(0,1fr);gap:clamp(18px,2.4vw,34px);align-items:start;
}
.callout .mark{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-40);white-space:nowrap;padding-top:.35em}
.callout h3{font-size:clamp(1.25rem,2vw,1.7rem);letter-spacing:-0.032em;margin-bottom:.8rem}
.callout p{color:var(--ink-60);font-size:1rem;max-width:68ch}
.ink-bg .callout{border-color:var(--paper)}
.ink-bg .callout p{color:var(--paper-60)}
.ink-bg .callout .mark{color:var(--paper-40)}
@media (max-width:760px){.callout{grid-template-columns:1fr;gap:14px}}

.srcs{margin-top:clamp(28px,3vw,44px);padding-top:20px;border-top:1px solid var(--ink-15)}
.srcs h6{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-40);font-weight:500;margin:0 0 12px}
.srcs ol{margin:0;padding-left:1.3em;display:grid;gap:.45em}
.srcs li{font-size:.79rem;line-height:1.5;color:var(--ink-40)}
.srcs a{background-image:linear-gradient(currentColor,currentColor);background-size:100% 1px;background-repeat:no-repeat;background-position:0 100%;transition:color .3s}
.srcs a:hover{color:var(--ink)}
.ink-bg .srcs{border-top-color:var(--paper-15)}
.ink-bg .srcs h6,.ink-bg .srcs li{color:var(--paper-40)}
.ink-bg .srcs a:hover{color:var(--paper)}
sup.ref{font-family:var(--f-mono);font-size:.58em;letter-spacing:0;vertical-align:super;opacity:.5;margin-left:.15em}

/* ---------- Misc ---------- */
.tag{display:inline-flex;align-items:center;gap:.5em;padding:.42em .85em;border:1px solid var(--ink-15);border-radius:100px;font-family:var(--f-mono);font-size:.6rem;letter-spacing:.13em;text-transform:uppercase;color:var(--ink-60)}
.ink-bg .tag{border-color:var(--paper-15);color:var(--paper-60)}
.list-check{list-style:none;margin:0;padding:0;display:grid;gap:.85em}
.list-check li{position:relative;padding-left:1.9em;font-size:.985rem;color:var(--ink-60)}
.list-check li::before{content:"";position:absolute;left:0;top:.52em;width:11px;height:6px;border-left:1.5px solid var(--ink);border-bottom:1.5px solid var(--ink);transform:rotate(-45deg)}
.ink-bg .list-check li{color:var(--paper-60)}
.ink-bg .list-check li::before{border-color:var(--paper)}

.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--paper);padding:12px 18px;z-index:1000}
.skip:focus{left:12px;top:12px}

/* ---------- Responsive ---------- */
@media (max-width:1180px){
  .mega-grid{grid-template-columns:1fr 1fr 1fr;gap:32px}
  .mega-feature{display:none}
  .ftr-top{grid-template-columns:1.3fr 1fr 1fr;gap:34px}
}
@media (max-width:980px){
  .nav{display:none}
  .burger{display:flex}
  .hdr-cta{display:none}
  .split,.split-even,.proc{grid-template-columns:1fr}
  .proc-sticky{position:static}
  .g-3,.g-4{grid-template-columns:repeat(2,1fr)}
  .dgrid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat{border-bottom:1px solid var(--paper-15)}
  .stat:nth-child(2n){border-right:0}
  .stat:nth-last-child(-n+2){border-bottom:0}
}
@media (max-width:760px){
  body{font-size:16px}
  .g-2,.g-3,.g-4{grid-template-columns:1fr}
  .dgrid{grid-template-columns:1fr}
  .table-scroll{overflow:visible}
  .dtable,.dtable tbody,.dtable tr,.dtable th,.dtable td{display:block;width:auto}
  .dtable thead{display:none}
  .dtable tr{padding:1.15em 0;border-bottom:1px solid var(--ink-15)}
  .ink-bg .dtable tr{border-bottom-color:var(--paper-15)}
  .dtable th,.dtable td{border:0;padding:0}
  .dtable tbody th{font-size:1rem;margin-bottom:.25em}
  .dtable td.figure-cell{font-size:1.75rem;margin-bottom:.45em}
  .dtable td:last-child{font-size:.86rem}
  .dtable tbody tr:hover{background:none}
  .opts-2,.opts-3{grid-template-columns:1fr}
  .field-2{grid-template-columns:1fr}
  .ftr-top{grid-template-columns:1fr 1fr}
  .hero-meta div{max-width:none;flex:1 1 140px}
  .quiz-foot{flex-direction:column-reverse;align-items:stretch}
  .quiz-foot .btn{width:100%}
  .btn{width:auto}
  .hero-actions .btn{flex:1 1 100%}
}