/* ClientCaptor — one stylesheet, no build step, no dependencies.
   Design system: measurement. Every number is mono. The caliper wraps
   measured spans only — never counts, never decoration. */

:root{
  --paper:#F7F7F4;
  --ink:#16181A;
  --muted:#6B7176;
  --rule:#DEDFDA;
  --panel:#EFEFEA;
  --read:#0F5C4E;   /* good reading, links, CTAs */
  --flag:#B01F13;   /* failing reading ONLY */
  --read-soft:#A7CCC3;

  --disp:'Archivo',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,'Cascadia Mono',Consolas,monospace;

  --wrap:min(1280px,92vw);
  --measure:66ch;
  --pad-y:clamp(2.6rem,6vw,4.5rem);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--disp);font-size:17px;line-height:1.55;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--read);text-underline-offset:.15em}
a:hover{color:var(--ink)}
:focus-visible{outline:2px solid var(--read);outline-offset:3px}
.wrap{width:var(--wrap);margin-inline:auto}
.skip{position:absolute;left:-9999px}
.skip:focus{left:1rem;top:1rem;z-index:99;background:var(--ink);color:var(--paper);padding:.6rem 1rem}

/* ---------- type ---------- */
.lab{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);margin:0}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-.025em;line-height:1.06}
h1{font-size:clamp(2.3rem,6.2vw,4.5rem);letter-spacing:-.035em}
h2{font-size:clamp(1.7rem,3.6vw,2.5rem)}
h3{font-size:clamp(1.3rem,2.4vw,1.85rem)}
h4{font-size:1.15rem}
p{margin:0 0 1rem;max-width:var(--measure)}
.lede{font-size:clamp(1.05rem,1.6vw,1.24rem);color:var(--muted);max-width:52ch}
.num{font-family:var(--mono);font-weight:700;letter-spacing:-.03em}
.good{color:var(--read)}
.bad{color:var(--flag)}
.strike{text-decoration:line-through;text-decoration-thickness:2px}
hr{border:0;border-top:1px solid var(--rule);margin:0}
.rule-hard{border:0;border-top:2px solid var(--ink);margin:0}

/* ---------- the mark ---------- */
.mark{display:block;flex:none}

/* ---------- masthead ---------- */
.mast{position:sticky;top:0;z-index:20;background:var(--paper);
  border-bottom:2px solid var(--ink)}
.mast .wrap{position:relative;display:flex;align-items:center;gap:1.2rem;
  padding:1rem 0 .95rem}
/* the masthead rule IS the caliper beam — jaws drop at each end */
.mast .wrap::before,.mast .wrap::after{content:"";position:absolute;bottom:-2px;
  width:2px;height:13px;background:var(--ink)}
.mast .wrap::before{left:0}
.mast .wrap::after{right:0}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--ink)}
.brand .wm{font-weight:700;font-size:1.24rem;letter-spacing:-.03em;
  display:inline-block}   /* one flex item — the gap must not split the name */
.brand em{font-style:normal;color:var(--read)}
.brand .mark{margin-bottom:2px}
.mast nav{margin-left:auto;display:none;gap:1.6rem;align-items:center}
.mast nav a{font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;
  text-transform:uppercase;text-decoration:none;color:var(--muted)}
.mast nav a:hover{color:var(--ink)}
.btn-sm{background:var(--ink);color:var(--paper)!important;padding:.6rem .95rem;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;
  text-decoration:none;font-weight:700}
.btn-sm:hover{background:var(--read);color:#fff!important}
@media(min-width:900px){.mast nav{display:flex}}
@media(max-width:899px){.mast .btn-sm{margin-left:auto}}

/* ---------- THE CALIPER DEVICE ----------
   Wraps a measured span. Beam + two jaws + ticks. */
.cal{position:relative;padding-top:2.1rem}
.cal::before{content:"";position:absolute;inset:0 0 auto 0;height:6px;background:var(--ink)}
.cal .jaw{position:absolute;top:0;width:6px;height:28px;background:var(--ink)}
.cal .jaw-l{left:0}
.cal .jaw-r{right:0}
.cal .ticks{position:absolute;top:10px;left:8px;right:8px;height:9px;
  background:repeating-linear-gradient(to right,
    var(--muted) 0 2px, transparent 2px calc(100% / var(--ticks,8)))}
.cal--sm{padding-top:1.5rem}
.cal--sm::before{height:4px}
.cal--sm .jaw{width:4px;height:16px}
.cal--sm .ticks{top:7px;height:6px}
.cal--light::before,.cal--light .jaw{background:var(--read-soft)}

@keyframes jawIn{from{transform:translateX(48px);opacity:0}to{transform:none;opacity:1}}
.cal .jaw-r{animation:jawIn .75s cubic-bezier(.2,.85,.25,1) both}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .cal .jaw-r{animation:none}
  *{transition:none!important}
}

/* the reading inside a caliper */
.reading{display:flex;align-items:flex-end;flex-wrap:wrap;gap:.5rem .9rem;
  padding:.9rem 1.1rem 0}
.reading .from{font-size:clamp(1.3rem,3vw,1.9rem);opacity:.75}
.reading .arrow{font-family:var(--mono);color:var(--muted);padding-bottom:.35rem}
.reading .to{font-size:clamp(2.4rem,6.5vw,3.6rem);line-height:.9}
.reading .unit{font-family:var(--mono);font-size:.85rem;color:var(--muted);
  padding-bottom:.5rem}
.cal-note{font-family:var(--mono);font-size:.72rem;line-height:1.5;
  color:var(--muted);padding:.9rem 1.1rem 0;max-width:52ch}

/* ---------- layout ---------- */
.sec{padding:var(--pad-y) 0}
.two{display:grid;gap:2.2rem}
@media(min-width:960px){.two{grid-template-columns:1fr 1fr;gap:4rem}}
.hero-grid{display:grid;gap:2.6rem}
@media(min-width:1000px){.hero-grid{grid-template-columns:1.5fr 1fr;gap:4rem;align-items:start}}
.hero h1{margin:.9rem 0 0;max-width:20ch;font-size:clamp(2.2rem,4.8vw,3.65rem)}
.hero h1 em{font-style:normal;color:var(--read)}
.geo{color:var(--read);margin-bottom:0}

/* ---------- doors ---------- */
.doors-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:.6rem 1.5rem;
  padding-bottom:.8rem;border-bottom:2px solid var(--ink)}
.doors-head .lab{margin-left:auto}
.doors{display:grid;grid-template-columns:1fr}
@media(min-width:700px){.doors{grid-template-columns:1fr 1fr}}
@media(min-width:1080px){.doors{grid-template-columns:repeat(4,1fr)}}
.door{display:flex;flex-direction:column;gap:.5rem;padding:1.6rem 1.3rem 1.5rem;
  text-decoration:none;color:inherit;border-bottom:1px solid var(--rule);
  transition:background .15s ease}
.door:first-child{padding-left:0}
.door:hover,.door:focus-visible{background:var(--panel)}
@media(min-width:700px){.door{border-right:1px solid var(--rule)}}
@media(min-width:1080px){.door:last-child{border-right:0}}
.door h3{color:var(--ink)}
.door .benefit{color:var(--read);font-size:1.02rem;font-weight:500;margin:0}
.door p{color:var(--muted);font-size:.94rem;margin:0;flex:1}
.door .read{font-family:var(--mono);font-weight:700;font-size:1.35rem;
  letter-spacing:-.02em;color:var(--ink);margin-top:.6rem}
.door .go{font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted)}

/* ---------- proof strip (counts — never the caliper) ---------- */
.proof{background:var(--ink);color:var(--paper);padding:clamp(2rem,4vw,2.8rem) 0}
.proof .lab{color:#9AA3A1}
.proof-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem 1rem;margin-top:1.2rem}
@media(min-width:860px){.proof-grid{grid-template-columns:repeat(4,1fr)}}
.stat b{display:block;font-family:var(--mono);font-weight:700;
  font-size:clamp(1.9rem,4vw,2.6rem);letter-spacing:-.04em;line-height:1}
.stat span{display:block;font-size:.86rem;color:#9AA3A1;margin-top:.35rem}

/* ---------- lists ---------- */
.nots{list-style:none;margin:0;padding:0}
.nots li{padding:.75rem 0;border-bottom:1px solid var(--rule)}
.nots li b{font-weight:600}
.nots li span{color:var(--muted)}
.nots li::before{content:"— ";font-family:var(--mono);color:var(--flag)}

/* ---------- case ---------- */
.case-reads{display:grid;grid-template-columns:1fr 1fr;gap:1.6rem 1.4rem;margin:1.6rem 0}
.case-reads .num{display:block;font-size:1.45rem;color:var(--read);padding-top:.55rem}
.case-reads .lab{display:block;margin-top:.2rem;font-size:.62rem}

/* ---------- steps ---------- */
.steps{display:grid;gap:1.6rem}
@media(min-width:840px){.steps{grid-template-columns:repeat(3,1fr);gap:2rem}}
.step{border-top:2px solid var(--ink);padding-top:1rem}
.step p{color:var(--muted);font-size:.95rem;margin:.4rem 0 0}

/* ---------- table ---------- */
table{width:100%;border-collapse:collapse;font-size:.94rem}
th,td{text-align:left;padding:.7rem .5rem;border-bottom:1px solid var(--rule);
  vertical-align:top}
th{font-family:var(--mono);font-size:.62rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);font-weight:400;
  border-bottom:2px solid var(--ink)}
td:first-child{font-weight:600}
td.n{font-family:var(--mono);white-space:nowrap}

/* ---------- cta ---------- */
.cta{background:var(--read);color:#fff;padding:clamp(2.6rem,6vw,4.5rem) 0}
.cta .lab{color:var(--read-soft)}
.cta h2{margin:.9rem 0 .7rem;max-width:18ch}
.cta p{color:#CFE3DD;max-width:44ch}
.btn{display:inline-block;background:#fff;color:var(--read)!important;
  font-family:var(--mono);font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;
  font-weight:700;padding:.9rem 1.5rem;text-decoration:none;border:2px solid #fff}
.btn:hover{background:transparent;color:#fff!important}
.cta small{display:block;margin-top:1.1rem;font-family:var(--mono);
  font-size:.72rem;color:var(--read-soft)}

/* ---------- footer ---------- */
footer{padding:2.2rem 0 3rem;font-family:var(--mono);font-size:.72rem;color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;gap:.6rem 2rem;justify-content:space-between}
footer a{color:var(--muted)}

@media print{
  .mast,.cta,.btn{display:none}
  body{font-size:11pt}
}

/* ---------- hero spec list ---------- */
.spec{list-style:none;margin:2.2rem 0 0;padding:0;border-top:1px solid var(--rule)}
.spec li{display:flex;justify-content:space-between;gap:1rem;padding:.6rem 0;
  border-bottom:1px solid var(--rule);font-size:.9rem}
.spec b{font-weight:600}
.spec span{font-family:var(--mono);font-size:.78rem;color:var(--muted);
  white-space:nowrap}

/* ---------- dark mode ----------
   Tokens flip. Two exceptions need explicit handling: the proof strip
   inverts to a light panel (fine), and the CTA uses the green as a
   BACKGROUND, so its text colour must flip too or it fails contrast. */
:root{--on-read:#ffffff}
@media (prefers-color-scheme: dark){
  :root{
    --paper:#131517;
    --ink:#ECEDE8;
    --muted:#98A09C;
    --rule:#2A2E31;
    --panel:#1B1E20;
    --read:#5FBFA8;      /* lifted for contrast on dark */
    --flag:#E4776A;      /* lifted for contrast on dark */
    --read-soft:#123C33;
    --on-read:#0E1F1A;   /* text ON the green panel */
  }
  .proof{background:var(--panel);color:var(--ink);
    border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
  .proof .lab,.stat span{color:var(--muted)}
  .stat b{color:var(--ink)}
  .cta{color:var(--on-read)}
  .cta h2{color:var(--on-read)}
  .cta p{color:#14322B}
  .cta .lab{color:#14322B}
  .cta small{color:#14322B}
  .btn{background:var(--on-read);color:var(--read)!important;border-color:var(--on-read)}
  .btn:hover{background:transparent;color:var(--on-read)!important}
  .btn-sm:hover{color:var(--on-read)!important}
  .mast{background:var(--paper)}
}