/* Self-hosted fonts (latin subset, woff2). Replaces the third-party Google
   Fonts request — removes the render-blocking chain and the font-swap CLS. */
@font-face{font-family:"Archivo";font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/archivo-400.woff2) format("woff2");}
@font-face{font-family:"Archivo";font-style:normal;font-weight:500;font-display:swap;src:url(/fonts/archivo-500.woff2) format("woff2");}
@font-face{font-family:"Archivo";font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/archivo-600.woff2) format("woff2");}
@font-face{font-family:"Archivo";font-style:normal;font-weight:700;font-display:swap;src:url(/fonts/archivo-700.woff2) format("woff2");}
@font-face{font-family:"Archivo";font-style:normal;font-weight:800;font-display:swap;src:url(/fonts/archivo-800.woff2) format("woff2");}
@font-face{font-family:"Archivo";font-style:normal;font-weight:900;font-display:swap;src:url(/fonts/archivo-900.woff2) format("woff2");}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/ibm-plex-sans-400.woff2) format("woff2");}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:500;font-display:swap;src:url(/fonts/ibm-plex-sans-500.woff2) format("woff2");}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/ibm-plex-sans-600.woff2) format("woff2");}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:700;font-display:swap;src:url(/fonts/ibm-plex-sans-700.woff2) format("woff2");}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/ibm-plex-mono-400.woff2) format("woff2");}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:500;font-display:swap;src:url(/fonts/ibm-plex-mono-500.woff2) format("woff2");}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/ibm-plex-mono-600.woff2) format("woff2");}
/* ============================================================
   GROUNDLOCK — Engineered duotone · RESPONSIVE site system
   Breakpoints:  base ≤639 (mobile) · md ≥640 · lg ≥900 (iPad)
                 · xl ≥1200 (desktop)
   ============================================================ */
:root{
  --ink:#13161B;
  --ink-2:#1C212A;
  --ink-3:#2A313D;
  --paper:#ECE6D9;
  --paper-2:#E3DBC9;
  --paper-card:#F4EFE4;
  --line:rgba(19,22,27,.16);
  --line-soft:rgba(19,22,27,.09);
  --line-paper:rgba(236,230,217,.16);
  --accent:#EC5524;
  --accent-deep:#C23C12;
  --accent-soft:rgba(236,85,36,.12);
  --steel:#5C6B7E;
  --steel-2:#7E8C9C;
  --ok:#3B7D5C;
  --warn:#C8761C;
  --danger:#C03522;
  --muted:#6A6457;
  --muted-ink:rgba(236,230,217,.62);

  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:"IBM Plex Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --disp:"Archivo","IBM Plex Sans",sans-serif;

  --wrap:1240px;
  --pad:clamp(20px,5.2vw,72px);
  --gutter:clamp(14px,2.4vw,28px);
  --header-h:64px;
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html,body{margin:0;padding:0;}
html{scroll-behavior:smooth;scroll-padding-top:80px;}
body{
  background:var(--ink);
  color:var(--ink);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
::selection{background:var(--accent);color:#fff;}
img{max-width:100%;display:block;}

/* ---------- Site shell (fluid, full width) ---------- */
.site{width:100%;position:relative;background:var(--paper);overflow:clip;}

/* inner container */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad);}

/* ---------- Type scale (fluid) ---------- */
.mono{font-family:var(--mono);text-transform:uppercase;letter-spacing:.2em;font-size:11px;font-weight:500;}
.eyebrow{
  font-family:var(--mono);font-size:clamp(10px,1.2vw,12px);font-weight:500;
  text-transform:uppercase;letter-spacing:.22em;
  display:inline-flex;align-items:center;gap:9px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;display:inline-block;flex:none;}
h1,h2,h3{margin:0;font-family:var(--disp);font-weight:800;font-stretch:118%;line-height:.98;letter-spacing:-.018em;}
h1{font-size:clamp(42px,7.2vw,92px);}
h2{font-size:clamp(30px,4.6vw,56px);}
h3{font-size:clamp(18px,2.1vw,22px);letter-spacing:-.01em;font-stretch:112%;}
p{margin:0;line-height:1.56;}
.lede{font-size:clamp(16px,1.9vw,21px);line-height:1.55;color:#36322A;}
.small{font-size:clamp(13px,1.4vw,15px);line-height:1.55;}
.dim{color:var(--muted);}
.measure{max-width:40ch;}

/* ---------- Section frame ---------- */
.sec{padding-top:clamp(52px,7vw,104px);padding-bottom:clamp(52px,7vw,104px);position:relative;}
.sec-ink{background:var(--ink);color:var(--paper);}
.sec-ink h1,.sec-ink h2,.sec-ink h3{color:var(--paper);}
.sec-paper{background:var(--paper);}
.sec-paper-2{background:var(--paper-2);}
.rule{height:1px;background:var(--line);width:100%;}
.rule-ink{height:1px;background:var(--line-paper);width:100%;}

.sec-tag{
  font-family:var(--mono);font-size:clamp(9px,1.1vw,11px);letter-spacing:.2em;
  text-transform:uppercase;color:var(--muted);opacity:.85;
}
.sec-ink .sec-tag{color:var(--muted-ink);}

/* head row used across sections (desktop) */
.head-row{display:flex;flex-direction:column;gap:6px;}
@media(min-width:900px){
  .head-row{flex-direction:row;justify-content:space-between;align-items:flex-end;gap:32px;}
  .head-row .head-aside{text-align:right;flex:none;max-width:34ch;}
}

/* ---------- Buttons ---------- */
.btn{
  appearance:none;border:none;cursor:pointer;
  font-family:var(--mono);font-size:clamp(12px,1.3vw,13.5px);font-weight:600;
  letter-spacing:.06em;text-transform:uppercase;
  padding:16px 22px;border-radius:2px;
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  width:100%;text-decoration:none;
  transition:transform .12s ease, background .15s ease, box-shadow .15s ease;
}
.btn-auto{width:auto;}
.btn:active{transform:translateY(1px) scale(.997);}
.btn-accent{background:var(--accent-deep);color:#fff;box-shadow:inset 0 0 0 1px var(--accent-deep), 0 1px 0 var(--accent-deep);}
.btn-accent:hover{background:#a8330e;}
.btn-ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink);}
.sec-ink .btn-ghost{color:var(--paper);box-shadow:inset 0 0 0 1.5px rgba(236,230,217,.5);}
.btn-ghost:hover{background:rgba(19,22,27,.05);}
.sec-ink .btn-ghost:hover{background:rgba(236,230,217,.08);}
.btn .arr{transition:transform .15s ease;}
.btn:hover .arr{transform:translateX(3px);}

.btn-row{display:flex;flex-direction:column;gap:10px;}
@media(min-width:520px){.btn-row{flex-direction:row;flex-wrap:wrap;}.btn-row .btn{width:auto;}}

/* ---------- Ticks ---------- */
.tick-row{display:flex;flex-wrap:wrap;gap:9px 18px;}
.tick{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:clamp(10px,1.2vw,12px);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);}
.sec-ink .tick{color:var(--muted-ink);}
.tick svg{flex:none;}

/* ---------- Logo ---------- */
.logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:inherit;}
.logo-mark{width:28px;height:28px;flex:none;}
.logo-word{font-family:var(--disp);font-weight:800;font-stretch:120%;letter-spacing:.01em;font-size:18px;line-height:1;}
.logo-word b{color:var(--accent);font-weight:800;}

/* ============================================================
   HEADER — real nav on desktop, compact on mobile
   ============================================================ */
.header{
  position:sticky;top:0;z-index:50;
  background:rgba(19,22,27,.92);backdrop-filter:blur(12px);
  color:var(--paper);
  border-bottom:1px solid var(--line-paper);
}
.header-in{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);}
.nav-links{display:none;}
.header .logo-word{color:var(--paper);}
.header-cta{display:flex;align-items:center;gap:12px;}
.header .call{
  font-family:var(--mono);font-size:12.5px;font-weight:600;letter-spacing:.04em;
  color:var(--paper);text-decoration:none;display:inline-flex;align-items:center;gap:8px;
  padding:9px 13px;border-radius:2px;box-shadow:inset 0 0 0 1px var(--line-paper);
  white-space:nowrap;
}
.header .call b{color:var(--accent);}
.header .call .num{display:none;}
.header .btn{display:none;}

@media(min-width:900px){
  .nav-links{display:flex;align-items:center;gap:26px;}
  .nav-links a{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-ink);text-decoration:none;transition:color .14s ease;}
  .nav-links a:hover{color:var(--paper);}
  .header .call .num{display:inline;}
  .header .btn{display:inline-flex;width:auto;padding:11px 18px;font-size:12px;}
}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  background:var(--ink);color:var(--paper);position:relative;overflow:hidden;
  padding-top:clamp(40px,6vw,72px);padding-bottom:clamp(48px,6vw,80px);
}
.hero-grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(236,230,217,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(236,230,217,.05) 1px,transparent 1px);background-size:clamp(28px,4vw,46px) clamp(28px,4vw,46px);pointer-events:none;mask-image:radial-gradient(120% 90% at 30% 10%,#000,transparent 75%);}
.hero h1,.hero h2,.hero h3{color:var(--paper);}
.hero-inner{position:relative;}
.hero-split{display:grid;gap:clamp(32px,5vw,56px);align-items:center;}
.hero-copy{min-width:0;}
.hero-visual{min-width:0;}
@media(min-width:980px){
  .hero-split{grid-template-columns:1.05fr .95fr;}
}
.underline-word{position:relative;color:var(--accent);white-space:nowrap;}
.underline-word svg{position:absolute;left:0;bottom:-.12em;width:100%;height:.18em;}

/* hero stat strip */
.hero-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line-paper);border:1px solid var(--line-paper);border-radius:3px;overflow:hidden;}
@media(min-width:560px){.hero-stats{grid-template-columns:repeat(4,1fr);}}
.hero-stat{background:var(--ink);padding:16px 16px;}
.hero-stat .statnum{font-size:clamp(22px,3vw,30px);}

/* hero visual card (blueprint spec) */
.spec-card{
  border:1px solid var(--line-paper);border-radius:4px;background:#0F1318;overflow:hidden;
  box-shadow:0 30px 80px -40px rgba(0,0,0,.8);
}
.spec-card-h{display:flex;justify-content:space-between;align-items:center;padding:13px 16px;border-bottom:1px solid var(--line-paper);}
.spec-card-b{padding:8px 0 0;}

/* ---------- Stat ---------- */
.statnum{font-family:var(--disp);font-weight:800;font-stretch:120%;line-height:.9;letter-spacing:-.02em;}

/* ---------- Cards ---------- */
.card{background:var(--paper-card);border:1px solid var(--line);border-radius:3px;}
.card-ink{background:var(--ink-2);border:1px solid var(--line-paper);border-radius:3px;}
.card-pad{padding:clamp(18px,2.4vw,26px);}

/* generic responsive grids */
.grid{display:grid;gap:var(--gutter);}
.cols-2{grid-template-columns:1fr;}
.cols-3{grid-template-columns:1fr;}
.cols-4{grid-template-columns:repeat(2,1fr);}
@media(min-width:640px){
  .cols-2{grid-template-columns:repeat(2,1fr);}
  .cols-3{grid-template-columns:repeat(2,1fr);}
}
@media(min-width:900px){
  .cols-3{grid-template-columns:repeat(3,1fr);}
  .cols-4{grid-template-columns:repeat(4,1fr);}
}

/* split content+media */
.split{display:grid;gap:clamp(28px,4vw,56px);align-items:center;}
@media(min-width:900px){
  .split{grid-template-columns:1fr 1fr;}
  .split.media-first .split-media{order:-1;}
  .split.wide-copy{grid-template-columns:1.1fr .9fr;}
}

/* ---------- Inputs ---------- */
.field{margin-bottom:16px;}
.field label{display:block;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted-ink);margin-bottom:8px;}
.input,.select,.textarea{
  width:100%;font-family:var(--sans);font-size:16px;color:var(--paper);
  background:var(--ink-2);border:1px solid var(--line-paper);border-radius:2px;
  padding:15px 15px;outline:none;transition:border .15s ease, box-shadow .15s ease;
}
.input::placeholder{color:rgba(236,230,217,.34);}
.input:focus,.select:focus,.textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);}
.input.err{border-color:var(--danger);box-shadow:0 0 0 3px rgba(192,53,34,.18);}
.errmsg{font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;color:#F08A6E;margin-top:6px;text-transform:uppercase;}
.field-2{display:grid;grid-template-columns:1fr;gap:0 16px;}
@media(min-width:560px){.field-2{grid-template-columns:1fr 1fr;}}

/* segmented */
.seg{display:grid;grid-auto-flow:column;gap:0;border:1px solid var(--line-paper);border-radius:2px;overflow:hidden;}
.seg button{appearance:none;border:none;background:var(--ink-2);color:var(--muted-ink);font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;padding:14px 6px;cursor:pointer;border-right:1px solid var(--line-paper);transition:all .12s ease;}
.seg button:last-child{border-right:none;}
.seg button.on{background:var(--accent-deep);color:#fff;}

/* ---------- Symptom checker ---------- */
.sympgrid{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
@media(min-width:560px){.sympgrid{grid-template-columns:repeat(3,1fr);}}
@media(min-width:900px){.sympgrid{grid-template-columns:repeat(4,1fr);}}
.symp{
  display:flex;align-items:center;gap:11px;text-align:left;
  background:var(--paper-card);border:1px solid var(--line);border-radius:3px;
  padding:14px 13px;cursor:pointer;font-family:var(--sans);
  transition:all .14s ease;position:relative;
}
.symp .sicon{flex:none;color:var(--steel);transition:color .14s ease;}
.symp .stxt{font-size:13.5px;line-height:1.2;font-weight:500;color:#2C2A23;}
.symp .sbox{position:absolute;top:10px;right:10px;width:16px;height:16px;border:1.5px solid var(--line);border-radius:2px;display:flex;align-items:center;justify-content:center;}
.symp.on{border-color:var(--accent);background:#fff;box-shadow:0 0 0 1px var(--accent), 0 6px 18px -10px rgba(236,85,36,.5);}
.symp.on .sicon{color:var(--accent);}
.symp.on .sbox{background:var(--accent);border-color:var(--accent);}

/* diagnostic layout: stack on mobile, side-by-side readout on desktop */
.diag-split{display:grid;gap:var(--gutter);align-items:start;}
@media(min-width:980px){.diag-split{grid-template-columns:1.4fr 1fr;}}

.gauge{height:10px;border-radius:6px;background:var(--paper-2);overflow:hidden;box-shadow:inset 0 0 0 1px var(--line);}
.gauge-fill{height:100%;border-radius:6px;transition:width .5s cubic-bezier(.2,.8,.2,1), background .4s ease;}

/* diagram */
.diagram-wrap{width:100%;border:1px solid var(--line-paper);border-radius:3px;background:#0F1318;overflow:hidden;}
.diag-cap{display:flex;justify-content:space-between;padding:12px 14px;border-top:1px solid var(--line-paper);font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted-ink);}

.kvs{display:grid;grid-template-columns:auto 1fr;gap:11px 18px;font-family:var(--mono);font-size:12.5px;}
.kvs dt{color:var(--muted);letter-spacing:.1em;text-transform:uppercase;font-size:10.5px;align-self:center;}
.kvs dd{margin:0;font-weight:600;color:var(--ink);}
.sec-ink .kvs dd{color:var(--paper);}
.sec-ink .kvs dt{color:var(--muted-ink);}

.quote{font-family:var(--disp);font-weight:600;font-stretch:108%;font-size:clamp(17px,2vw,21px);line-height:1.3;letter-spacing:-.01em;}

/* process steps row -> grid on desktop */
.steps{display:grid;gap:0;}
.step{display:flex;gap:18px;padding:18px 0;border-top:1px solid var(--line-paper);}
@media(min-width:900px){
  .steps{grid-template-columns:repeat(2,1fr);gap:0 40px;}
  .step{border-top:1px solid var(--line-paper);}
}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .7s ease, transform .7s cubic-bezier(.2,.8,.2,1);}
.reveal.in{opacity:1;transform:none;}

/* ---------- Sticky mobile action bar (hidden on desktop) ---------- */
.actionbar{
  position:fixed;bottom:0;left:0;right:0;z-index:60;
  display:grid;grid-template-columns:1fr 1.5fr;gap:9px;
  padding:11px clamp(14px,4vw,20px) calc(11px + env(safe-area-inset-bottom));
  background:rgba(19,22,27,.94);backdrop-filter:blur(10px);
  border-top:1px solid var(--line-paper);
  transform:translateY(120%);
  transition:transform .3s cubic-bezier(.2,.8,.2,1);
}
.actionbar.show{transform:translateY(0);}
.actionbar .btn{padding:15px 14px;font-size:12.5px;}
@media(min-width:900px){.actionbar{display:none !important;}}

/* footer */
.foot-grid{display:grid;gap:clamp(28px,4vw,48px);}
@media(min-width:760px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr;}}

/* ---------- Diagram animation ---------- */
.diagram-svg .pier-seg{opacity:0;transform:translateY(-46px);transform-box:fill-box;transform-origin:center;}
.diagram-svg.in .pier-seg{animation:pierdrop .42s cubic-bezier(.2,.7,.3,1) forwards;}
@keyframes pierdrop{from{opacity:0;transform:translateY(-46px);}to{opacity:1;transform:translateY(0);}}
.diagram-svg .slab-grp{transform:rotate(3.6deg);transform-box:fill-box;transform-origin:84% 96%;transition:transform 1.1s cubic-bezier(.34,1.25,.4,1) .75s;}
.diagram-svg.in .slab-grp{transform:rotate(0deg);}
.diagram-svg .bracket{opacity:0;transition:opacity .4s ease .7s;}
.diagram-svg.in .bracket{opacity:1;}
.diagram-svg .lift-arrow{opacity:0;transform:translateY(12px);transform-box:fill-box;transition:all .6s ease 1.5s;}
.diagram-svg.in .lift-arrow{opacity:1;transform:translateY(0);}

@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  .diagram-svg .pier-seg{opacity:1;transform:none;animation:none;}
  .diagram-svg .slab-grp{transform:rotate(0deg);transition:none;}
  .diagram-svg .bracket,.diagram-svg .lift-arrow{opacity:1;transform:none;transition:none;}
}