/* =========================================================
   Throughline AI — shared styles
   Palette:  ink #15202B | paper #FBFAF6 | marigold #E29A3C
             petrol #1C5556 | mist #ECE7DC | muted #5B6573
   Type:     Bricolage Grotesque (display) / IBM Plex Sans (body)
             IBM Plex Mono (labels)
   ========================================================= */

:root{
  --ink:#15202B;
  --ink-soft:#26323F;
  --paper:#FBFAF6;
  --marigold:#E29A3C;
  --marigold-deep:#C77F23;
  --petrol:#1C5556;
  --petrol-soft:#2E6F70;
  --mist:#ECE7DC;
  --line:#DED8CC;
  --muted:#5B6573;
  --muted-on-ink:#A9B4C0;

  --maxw:1120px;
  --gutter:clamp(20px,5vw,64px);
  --radius:14px;

  --display:"Bricolage Grotesque","Inter",system-ui,sans-serif;
  --body:"IBM Plex Sans",system-ui,-apple-system,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}

body{
  font-family:var(--body);
  background:var(--paper);
  color:var(--ink);
  line-height:1.6;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}

/* ---------- type ---------- */
h1,h2,h3,h4{font-family:var(--display);font-weight:600;line-height:1.08;letter-spacing:-0.01em}
.eyebrow{
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--petrol);
  font-weight:500;
  display:inline-flex;
  align-items:center;
  gap:.6em;
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  background:var(--marigold);
  display:inline-block;
}
.eyebrow.on-ink{color:var(--marigold)}

h1{font-size:clamp(2.5rem,6vw,4.3rem)}
h2{font-size:clamp(1.9rem,3.6vw,2.9rem)}
h3{font-size:clamp(1.2rem,1.8vw,1.45rem)}
.lead{font-size:clamp(1.1rem,1.5vw,1.3rem);color:var(--muted);max-width:60ch}
.lead.on-ink{color:var(--muted-on-ink)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.55em;
  font-family:var(--body);font-weight:600;font-size:1rem;
  padding:.85em 1.4em;border-radius:999px;
  border:1.5px solid transparent;cursor:pointer;
  transition:transform .15s ease,background .2s ease,box-shadow .2s ease,color .2s ease;
}
.btn:focus-visible{outline:3px solid var(--petrol);outline-offset:3px}
.btn .arr{transition:transform .2s ease}
.btn:hover .arr{transform:translateX(3px)}
.btn-primary{background:var(--marigold);color:var(--ink);box-shadow:0 1px 0 var(--marigold-deep)}
.btn-primary:hover{background:var(--marigold-deep);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-1px)}
.btn-ghost.on-ink{border-color:rgba(255,255,255,.25);color:var(--paper)}
.btn-ghost.on-ink:hover{border-color:var(--marigold);color:#fff}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(251,250,246,.82);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:.6em;font-family:var(--display);font-weight:700;font-size:1.18rem;letter-spacing:-.02em}
.brand .mark{width:26px;height:26px;flex:none}
.nav-links{display:flex;align-items:center;gap:clamp(14px,2.5vw,34px)}
.nav-links a.navlink{font-size:.96rem;color:var(--ink);font-weight:500;position:relative;padding:4px 0}
.nav-links a.navlink::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--marigold);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.nav-links a.navlink:hover::after,.nav-links a.navlink[aria-current="page"]::after{transform:scaleX(1)}
.nav-cta{padding:.55em 1.05em;font-size:.95rem}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.25s}

@media(max-width:820px){
  .nav-toggle{display:block}
  .nav-links{
    position:absolute;top:68px;left:0;right:0;
    flex-direction:column;align-items:flex-start;gap:18px;
    background:var(--paper);border-bottom:1px solid var(--line);
    padding:22px var(--gutter) 28px;
    transform:translateY(-12px);opacity:0;pointer-events:none;transition:.22s;
  }
  .nav-links.open{transform:none;opacity:1;pointer-events:auto}
  .nav-cta{width:100%;justify-content:center}
}

/* ---------- generic section ---------- */
.block{padding-block:clamp(64px,9vw,120px)}
.block-tight{padding-block:clamp(48px,6vw,80px)}
.section-head{max-width:62ch}
.section-head h2{margin-top:.5rem}
.section-head .lead{margin-top:1rem}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding-block:clamp(70px,11vw,140px)}
.hero .wrap{position:relative;z-index:2}
.hero h1{margin-top:1.1rem;max-width:16ch}
.hero h1 .hl{color:var(--petrol);position:relative}
.hero .lead{margin-top:1.5rem}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:2.2rem}
.hero-meta{margin-top:1.6rem;font-family:var(--mono);font-size:.8rem;color:var(--muted);letter-spacing:.02em}

/* the throughline — vertical signature thread */
.thread{position:absolute;inset:0;z-index:1;pointer-events:none}
.thread svg{width:100%;height:100%}
.thread path{
  fill:none;stroke:var(--marigold);stroke-width:2.5;
  stroke-linecap:round;opacity:.55;
}

/* ---------- value strip ---------- */
.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:2.6rem}
.value-cell{background:var(--paper);padding:26px 22px}
.value-cell .vk{font-family:var(--mono);font-size:.72rem;color:var(--marigold-deep);letter-spacing:.1em;text-transform:uppercase}
.value-cell p{margin-top:.5rem;font-size:1.02rem}
@media(max-width:780px){.value-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:460px){.value-grid{grid-template-columns:1fr}}

/* ---------- dark band ---------- */
.band-ink{background:var(--ink);color:var(--paper)}
.band-ink h2{color:#fff}
.band-ink .lead{color:var(--muted-on-ink)}
.band-petrol{background:var(--petrol);color:#fff}
.band-petrol h2{color:#fff}
.band-petrol .lead{color:rgba(255,255,255,.82)}

/* ---------- maturity ladder (signature) ---------- */
.ladder{margin-top:3rem;position:relative}
.rung{
  display:grid;grid-template-columns:64px 1fr;gap:24px;
  padding:26px 0;border-top:1px solid var(--line);
  align-items:start;
}
.rung:last-child{border-bottom:1px solid var(--line)}
.rung-num{
  font-family:var(--mono);font-size:.8rem;color:var(--muted);
  padding-top:.4rem;position:relative;
}
.rung-dot{width:13px;height:13px;border-radius:50%;background:var(--paper);border:2.5px solid var(--marigold);margin-bottom:.6rem}
.rung-body h3{margin-bottom:.4rem}
.rung-body .need{color:var(--muted);max-width:64ch}
.rung-tag{display:inline-block;margin-top:.8rem;font-family:var(--mono);font-size:.72rem;letter-spacing:.05em;color:var(--petrol);background:var(--mist);padding:.3em .7em;border-radius:999px}
/* progressive indent encodes "climbing" the maturity path */
.rung[data-step="2"] .rung-body{padding-left:clamp(0px,2vw,22px)}
.rung[data-step="3"] .rung-body{padding-left:clamp(0px,4vw,44px)}
.rung[data-step="4"] .rung-body{padding-left:clamp(0px,6vw,66px)}
.rung[data-step="5"] .rung-body{padding-left:clamp(0px,8vw,88px)}
@media(max-width:680px){
  .rung{grid-template-columns:40px 1fr;gap:14px}
  .rung [class^="rung"][class*="body"]{padding-left:0!important}
  .rung-body{padding-left:0!important}
}

/* ---------- process steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:2.8rem;counter-reset:s}
.step{padding:28px 24px 30px;border-left:1px solid rgba(255,255,255,.16);position:relative}
.step:first-child{border-left:0;padding-left:0}
.step .sn{font-family:var(--mono);font-size:.78rem;color:var(--marigold);letter-spacing:.1em}
.step h3{color:#fff;font-size:1.18rem;margin:.7rem 0 .5rem}
.step p{color:var(--muted-on-ink);font-size:.98rem}
@media(max-width:820px){.steps{grid-template-columns:1fr 1fr}.step{border-left:0;padding-left:0;padding-right:18px}}
@media(max-width:480px){.steps{grid-template-columns:1fr}}

/* ---------- service cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:2.8rem}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:0 14px 34px -22px rgba(21,32,43,.5);border-color:var(--marigold)}
.card .ck{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--petrol)}
.card h3{margin:.7rem 0 .55rem;font-size:1.25rem}
.card p{color:var(--muted);font-size:1rem}
.card ul{list-style:none;margin-top:1rem;display:flex;flex-direction:column;gap:.5rem}
.card li{position:relative;padding-left:1.4em;font-size:.97rem}
.card li::before{content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;border-radius:50%;background:var(--marigold)}
@media(max-width:900px){.cards{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.cards{grid-template-columns:1fr}}

/* ---------- catalog (services page) ---------- */
.catalog{display:flex;flex-direction:column;gap:0;margin-top:2.6rem}
.cat-group{border-top:1px solid var(--line);padding:34px 0}
.cat-group:last-child{border-bottom:1px solid var(--line)}
.cat-grid{display:grid;grid-template-columns:240px 1fr;gap:32px;align-items:start}
.cat-grid h3{font-size:1.4rem}
.cat-grid .cat-intro{color:var(--muted);margin-top:.6rem;font-size:.98rem}
.cat-items{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.cat-item .ci-name{font-weight:600;font-family:var(--display);font-size:1.08rem}
.cat-item p{color:var(--muted);font-size:.95rem;margin-top:.25rem}
@media(max-width:760px){.cat-grid{grid-template-columns:1fr;gap:18px}.cat-items{grid-template-columns:1fr}}

/* ---------- prose (about) ---------- */
.prose{max-width:68ch}
.prose p{margin-bottom:1.15rem;font-size:1.08rem}
.prose h2{margin:2.4rem 0 1rem}
.prose h3{margin:1.8rem 0 .6rem}
.prose ul{margin:0 0 1.2rem 1.1rem;display:flex;flex-direction:column;gap:.5rem}
.callout{background:var(--mist);border-left:3px solid var(--marigold);padding:22px 24px;border-radius:0 var(--radius) var(--radius) 0;margin:1.6rem 0}
.callout p{margin:0;font-size:1.02rem}

/* two-col on about */
.split{display:grid;grid-template-columns:1fr 1fr;gap:40px}
@media(max-width:820px){.split{grid-template-columns:1fr;gap:24px}}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;margin-top:2.6rem;align-items:start}
@media(max-width:880px){.contact-grid{grid-template-columns:1fr;gap:28px}}
.embed-card,.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.embed-note{font-family:var(--mono);font-size:.78rem;color:var(--muted);background:var(--mist);border:1px dashed var(--line);border-radius:10px;padding:14px 16px;margin-top:14px;line-height:1.5}
.calendly-slot{margin-top:16px;min-height:300px;border:1px dashed var(--line);border-radius:10px;display:flex;align-items:center;justify-content:center;text-align:center;color:var(--muted);padding:24px;font-size:.95rem}

.field{margin-bottom:16px}
.field label{display:block;font-size:.9rem;font-weight:600;margin-bottom:6px}
.field input,.field textarea,.field select{
  width:100%;font-family:var(--body);font-size:1rem;
  padding:.7em .8em;border:1.5px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink);
  transition:border-color .15s ease,box-shadow .15s ease;
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--petrol);box-shadow:0 0 0 3px rgba(28,85,86,.12)}
.field textarea{min-height:130px;resize:vertical}
.form-hint{font-size:.82rem;color:var(--muted);margin-top:6px}
.form-status{margin-top:12px;font-size:.92rem;display:none}

/* ---------- final CTA ---------- */
.cta-band{text-align:center}
.cta-band .wrap{max-width:720px}
.cta-band h2{margin-bottom:1rem}
.cta-band .btn{margin-top:1.6rem}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--muted-on-ink);padding-block:54px 40px}
.foot-top{display:flex;flex-wrap:wrap;gap:32px;justify-content:space-between;align-items:flex-start}
.foot-brand{display:flex;align-items:center;gap:.6em;font-family:var(--display);font-weight:700;color:#fff;font-size:1.15rem}
.foot-brand .mark{width:24px;height:24px}
.foot-links{display:flex;gap:28px;flex-wrap:wrap}
.foot-links a{color:var(--muted-on-ink);font-size:.95rem}
.foot-links a:hover{color:var(--marigold)}
.foot-bottom{margin-top:36px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:.84rem;color:var(--muted-on-ink)}
.foot-bottom .mono{font-family:var(--mono)}

/* ---------- reveal animation ---------- */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .thread path{animation:none!important}
}