/* ═══════════════════════════════════════════════════════════
   JERNIH — process-schematic engineering (P&ID)
   plant white · wet slate · potable cyan · out-of-spec amber
   ═══════════════════════════════════════════════════════════ */

:root{
  --plant:#F4F6F5;
  --panel:#EAEDEC;
  --white:#FDFEFD;
  --slate:#38434A;
  --slate-70:#5F6C74;
  --slate-40:#93A0A7;
  --line:#D5DBDA;
  --cyan:#1FA8B8;
  --cyan-d:#137A87;
  --amber:#E8A33D;
  --dark:#222B31;

  --f-disp:"Host Grotesk",system-ui,sans-serif;
  --f-body:"Sofia Sans",system-ui,sans-serif;
  --f-mono:"PT Mono",ui-monospace,monospace;

  --s-1:clamp(.7rem,.67rem + .14vw,.78rem);
  --s0:clamp(1rem,.96rem + .2vw,1.09rem);
  --s1:clamp(1.12rem,1.02rem + .45vw,1.34rem);
  --s2:clamp(1.4rem,1.15rem + 1.1vw,2.05rem);
  --s3:clamp(1.85rem,1.3rem + 2.4vw,3.2rem);
  --s4:clamp(2.2rem,1.4rem + 3.6vw,4.4rem);

  --gut:clamp(1.35rem,5vw,4.5rem);
  --maxw:82rem;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--plant);color:var(--slate);
  font-family:var(--f-body);font-size:var(--s0);line-height:1.62;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img,canvas,svg{display:block;max-width:100%}
a{color:inherit}
h1,h2,h3{margin:0;font-family:var(--f-disp);font-weight:600;line-height:1.06;letter-spacing:-.018em;text-wrap:balance}
p{margin:0 0 1em}
::selection{background:var(--cyan);color:#fff}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.skip{position:absolute;left:-999px;top:0;z-index:200;background:var(--slate);color:var(--white);padding:.7rem 1.1rem;font-family:var(--f-mono);font-size:var(--s-1)}
.skip:focus{left:0}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

.kicker{font-family:var(--f-mono);font-size:var(--s-1);letter-spacing:.14em;text-transform:uppercase;color:var(--slate-40);margin:0 0 1rem}

@media (prefers-reduced-motion:no-preference){
  @supports (animation-timeline:view()){
    .reveal{animation:up linear both;animation-timeline:view();animation-range:entry 4% cover 20%}
  }
  @supports not (animation-timeline:view()){
    .js .reveal{opacity:0;transform:translateY(14px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
    .js .reveal.in{opacity:1;transform:none}
  }
}
@keyframes up{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}

/* header */
.hdr{position:fixed;inset:0 0 auto;z-index:60;transition:transform .34s,background .3s}
.hdr.up{transform:translateY(-102%)}
.hdr.solid{background:rgba(244,246,245,.95);border-bottom:1px solid var(--line)}
.hdr__in{max-width:var(--maxw);margin-inline:auto;padding:.9rem var(--gut);display:flex;align-items:center;gap:1.3rem}
.mark{font-family:var(--f-disp);font-weight:600;font-size:1.1rem;letter-spacing:.1em;text-decoration:none;display:flex;align-items:baseline;gap:.55rem;white-space:nowrap}
.mark span{font-family:var(--f-mono);font-size:.58rem;letter-spacing:.12em;text-transform:uppercase;color:var(--slate-40)}
.nav{margin-left:auto;display:flex;align-items:center;gap:1.4rem}
.nav a{text-decoration:none;font-size:var(--s-1);color:var(--slate-70);white-space:nowrap;padding:.5rem 0;border-bottom:1px solid transparent;transition:.2s}
.nav a:hover{color:var(--slate);border-bottom-color:var(--cyan)}
.nav__cta{background:var(--slate);color:var(--white)!important;padding:.55rem .95rem!important;border:0!important;border-radius:2px}
.nav__cta:hover{background:var(--cyan)}
.burger{display:none}
@media (max-width:1120px){
  .nav{position:fixed;inset:0;z-index:65;background:var(--plant);flex-direction:column;justify-content:center;gap:1.4rem;margin:0;visibility:hidden;opacity:0;transition:.3s}
  .nav.open{visibility:visible;opacity:1}
  .nav a{font-size:1.12rem}
  .burger{display:flex;flex-direction:column;justify-content:center;gap:5px;margin-left:auto;width:44px;height:44px;padding:0 10px;background:none;border:0;cursor:pointer;z-index:70}
  .burger span{display:block;height:1.6px;background:var(--slate);transition:.3s}
  .burger[aria-expanded="true"] span:first-child{transform:translateY(3.3px) rotate(45deg)}
  .burger[aria-expanded="true"] span:last-child{transform:translateY(-3.3px) rotate(-45deg)}
}

/* ── hero ───────────────────────────────────────────────── */
.hero{position:relative;padding:8rem var(--gut) clamp(3rem,7vh,5rem);overflow:hidden}
.hero__pipe{position:absolute;left:0;right:0;bottom:0;width:100%;height:min(46vh,340px);z-index:0}
.hero__in{position:relative;z-index:1;max-width:var(--maxw);margin-inline:auto}
.hero__h{font-size:var(--s4);line-height:1.04;margin-bottom:1.4rem}
.hero__sub{max-width:40rem;color:var(--slate-70);font-size:var(--s1);line-height:1.55}
.hero__acts{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.9rem}
.btn{
  display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:.7rem 1.3rem;text-decoration:none;
  border:1px solid var(--slate);border-radius:2px;background:none;color:var(--slate);
  font-family:var(--f-mono);font-size:var(--s-1);cursor:pointer;transition:.2s;white-space:nowrap;
}
.btn:hover{background:var(--slate);color:var(--white)}
.btn--go{background:var(--slate);color:var(--white)}
.btn--go:hover{background:var(--cyan);border-color:var(--cyan)}
.btn--big{min-height:54px;padding:.9rem 1.9rem}
.hero__stats{display:flex;flex-wrap:wrap;gap:1.4rem 2.6rem;margin:2.6rem 0 min(38vh,290px);border-top:1px solid var(--line);padding-top:1.1rem}
.hero__stats div{display:flex;flex-direction:column}
.hero__stats dt{font-family:var(--f-mono);font-size:.62rem;letter-spacing:.13em;text-transform:uppercase;color:var(--slate-40)}
.hero__stats dd{margin:0;font-family:var(--f-mono);font-size:1.02rem;color:var(--slate);font-variant-numeric:tabular-nums}

/* ── lede ───────────────────────────────────────────────── */
.lede{max-width:58rem;margin-inline:auto;padding:clamp(3rem,8vh,5.5rem) var(--gut);border-top:1px solid var(--line)}
.lede p{font-size:var(--s1);line-height:1.6;color:var(--slate-70)}
.lede p:first-child{color:var(--slate)}

/* ══ THE TRAIN ═════════════════════════════════════════════ */
.train{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:clamp(3rem,8vh,5rem) 0 0}
.train__hd{max-width:var(--maxw);margin:0 auto;padding:0 var(--gut) 2rem}
.train__hd h2{font-size:var(--s3)}
.train__lead{margin-top:1.2rem;max-width:44rem;color:var(--slate-70)}
.train__stick{position:sticky;top:56px;z-index:20;background:var(--panel);padding:.6rem var(--gut) .9rem;border-bottom:1px solid var(--line)}
#pid{width:100%;height:min(30svh,220px);max-width:var(--maxw);margin-inline:auto}
.gauges{
  max-width:var(--maxw);margin:.5rem auto 0;display:grid;gap:1px;background:var(--line);
  border:1px solid var(--line);grid-template-columns:repeat(2,1fr);
}
@media (min-width:640px){.gauges{grid-template-columns:repeat(4,1fr)}}
.g{background:var(--panel);padding:.45rem .7rem;display:flex;flex-direction:column;gap:.05rem}
.g__l{font-family:var(--f-mono);font-size:.58rem;letter-spacing:.14em;text-transform:uppercase;color:var(--slate-40)}
.g b{font-family:var(--f-mono);font-weight:400;font-size:clamp(1rem,2.6vw,1.35rem);color:var(--cyan-d);font-variant-numeric:tabular-nums}
.g b i{font-style:normal;font-size:.6em;color:var(--slate-40)}

.stages{list-style:none;margin:0;padding:0;max-width:var(--maxw);margin-inline:auto}
.stg{
  padding:clamp(2.4rem,7vh,4.5rem) var(--gut);border-bottom:1px solid var(--line);
  display:grid;gap:.7rem 2.4rem;grid-template-columns:1fr;max-width:60rem;
  opacity:.42;transition:opacity .4s ease;
}
.stg.on{opacity:1}
html.no-js .stg{opacity:1}
.stg__no{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);margin:0}
.stg h3{font-size:var(--s2)}
.stg>p{color:var(--slate-70);margin:0}
.stg__kv{display:flex;flex-wrap:wrap;gap:.9rem 2rem;margin:.6rem 0 0}
.stg__kv div{display:flex;flex-direction:column}
.stg__kv dt{font-family:var(--f-mono);font-size:.58rem;letter-spacing:.13em;text-transform:uppercase;color:var(--slate-40)}
.stg__kv dd{margin:0;font-family:var(--f-mono);font-size:.86rem;color:var(--slate)}

/* ── sections ───────────────────────────────────────────── */
.sect{max-width:var(--maxw);margin-inline:auto;padding:clamp(3.2rem,8vh,6rem) var(--gut)}
.sect__hd{margin-bottom:clamp(2rem,5vh,3.2rem);max-width:48rem}
.sect__hd h2{font-size:var(--s3)}
.sect__lead{margin-top:1.2rem;color:var(--slate-70);max-width:44rem}

/* 6 cards — column counts are explicit divisors of 6 (1 / 2 / 3) so the last
   row is never short. The hairline is drawn per-cell rather than by painting
   the container behind a 1px gap: an auto-fit track that goes unfilled would
   otherwise render as a grey slab. Rings overlap inside the 1px gap, so the
   rule stays exactly 1px and the outer edge gets its border for free. */
.grid5{display:grid;gap:1px;grid-template-columns:1fr}
@media (min-width:640px){.grid5{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1000px){.grid5{grid-template-columns:repeat(3,1fr)}}
.cardx{background:var(--plant);padding:1.5rem 1.4rem;box-shadow:0 0 0 1px var(--line)}
.cardx h3{font-size:var(--s1);margin-bottom:.6rem}
.cardx p{color:var(--slate-70);font-size:calc(var(--s0) * .93);margin:0}
.cardx--no{background:var(--dark);color:rgba(253,254,253,.82)}
.cardx--no h3{color:var(--amber)}
.cardx--no p{color:rgba(253,254,253,.72)}

/* tables */
.tablewrap{overflow-x:auto;border-top:1px solid var(--slate);border-bottom:1px solid var(--slate)}
.tbl{width:100%;border-collapse:collapse;min-width:42rem;font-size:calc(var(--s0) * .92)}
.tbl th,.tbl td{text-align:left;padding:.8rem 1rem .8rem 0;border-bottom:1px solid var(--line);vertical-align:top}
.tbl thead th{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;color:var(--slate-40);font-weight:400}
.tbl tbody th{font-weight:500;font-family:var(--f-disp);font-size:.98rem;padding-right:1.2rem}
.tbl td{color:var(--slate-70)}
.tbl .num{font-family:var(--f-mono);color:var(--cyan-d);white-space:nowrap;font-variant-numeric:tabular-nums}
.tbl .raw{font-family:var(--f-mono);color:var(--amber);font-variant-numeric:tabular-nums;white-space:nowrap}
.tbl .mar{font-family:var(--f-mono);color:var(--slate-40);font-variant-numeric:tabular-nums}
.tbl tfoot th,.tbl tfoot td{border-bottom:0;padding-top:1rem;color:var(--slate)}
.tbl--cost tfoot .num{font-size:1.15em;color:var(--cyan-d)}

.costwrap{display:grid;gap:1.8rem;grid-template-columns:1fr}
@media (min-width:1020px){.costwrap{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:2.4rem;align-items:start}}
.costnote{background:var(--dark);color:rgba(253,254,253,.84);padding:1.6rem 1.5rem;border-radius:2px}
.costnote h3{font-family:var(--f-mono);font-weight:400;font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--amber);margin-bottom:1rem}
.costnote p{font-size:calc(var(--s0) * .93);color:rgba(253,254,253,.78)}
.costnote b{color:var(--white);font-weight:600}
.costnote__f{font-family:var(--f-mono);font-size:.68rem!important;color:rgba(253,254,253,.42)!important;margin-bottom:0!important}

/* om */
/* 4 cards — 1 / 2 / 4, all divisors of 4, so no orphan on the last row. */
.om{display:grid;gap:1.2rem;grid-template-columns:1fr}
@media (min-width:600px){.om{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1020px){.om{grid-template-columns:repeat(4,1fr)}}
.om__card{border-top:2px solid var(--cyan);padding-top:1rem}
.om__n{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.16em;color:var(--cyan)}
.om__card h3{font-size:var(--s1);margin:.4rem 0 .5rem}
.om__card p{color:var(--slate-70);font-size:calc(var(--s0) * .92);margin:0}

/* faq */
.faq{border-top:1px solid var(--line)}
.q{border-bottom:1px solid var(--line)}
.q summary{cursor:pointer;list-style:none;padding:1.05rem 2.4rem 1.05rem 0;position:relative;font-family:var(--f-disp);font-weight:500;font-size:var(--s1);min-height:44px;display:flex;align-items:center}
.q summary::-webkit-details-marker{display:none}
.q summary::after{content:"+";position:absolute;right:.3rem;top:50%;transform:translateY(-50%);color:var(--cyan);font-family:var(--f-mono)}
.q[open] summary::after{content:"–"}
.q p{color:var(--slate-70);max-width:48rem;padding-bottom:1.2rem;margin:0;font-size:calc(var(--s0) * .93)}

/* contact */
.contact{background:var(--dark);color:var(--white);padding:clamp(3.4rem,10vh,7rem) var(--gut)}
.contact__in{max-width:var(--maxw);margin-inline:auto}
.contact .kicker{color:rgba(253,254,253,.45)}
.contact h2{font-size:var(--s3);margin-bottom:1.2rem}
.contact__lead{max-width:42rem;color:rgba(253,254,253,.74)}
/* 3 blocks — 1 / 3, so the row is always complete. */
.contact__grid{display:grid;gap:1.5rem;grid-template-columns:1fr;margin:2.4rem 0 0;border-top:1px solid rgba(253,254,253,.2);padding-top:1.5rem}
@media (min-width:760px){.contact__grid{grid-template-columns:repeat(3,1fr)}}
.contact__grid h3{font-family:var(--f-mono);font-weight:400;font-size:.62rem;letter-spacing:.15em;text-transform:uppercase;color:rgba(253,254,253,.45);margin-bottom:.55rem}
.contact__grid p{color:rgba(253,254,253,.82);margin:0;line-height:1.75}
.contact__grid a{color:var(--cyan);text-decoration:none}
.contact__grid a:hover{text-decoration:underline}
.contact .btn{border-color:rgba(253,254,253,.4);color:var(--white);margin-top:1.8rem}
.contact .btn--go{background:var(--cyan);border-color:var(--cyan);color:#03242A}
.contact .btn--go:hover{background:var(--white);color:var(--dark);border-color:var(--white)}

/* footer */
.ftr{padding:2.4rem var(--gut) 3rem;border-top:1px solid var(--line)}
.ftr__in{max-width:var(--maxw);margin-inline:auto}
.ftr__mark{font-family:var(--f-disp);font-weight:600;font-size:.95rem;letter-spacing:.12em;margin-bottom:.45rem}
.ftr p{color:var(--slate-40);font-size:var(--s-1);margin:0 0 .3rem}
.ftr__fine{margin-top:.9rem!important;max-width:52rem;color:#AAB4B9!important}

@media (max-width:700px){
  .train__stick{top:52px}
  #pid{height:150px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .stg{opacity:1}
}