/* Eutech Systems — site styles. One typeface (Archivo, variable width + weight), no build step. */
@font-face{font-family:"Archivo";src:url("../fonts/archivo-var.woff2") format("woff2");font-weight:100 900;font-stretch:62% 125%;font-display:swap}

:root{
  --paper:#F3F6F4; --white:#FFFFFF; --ink:#10272B; --muted:#496166;
  --river:#0E5C63; --deep:#083B41; --sky:#DDEAEC; --silt:#D8CCAE; --silt-dark:#B9A980;
  --signal:#E8A317; --signal-ink:#3A2800; --bad:#A3271B; --ok:#1F6B3A;
  --line:rgba(16,39,43,.16); --line-strong:rgba(16,39,43,.4);
  --wrap:76rem; --gut:clamp(1rem,4vw,2.5rem);
  --r-s:4px; --r-m:10px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:400 1.0625rem/1.6 "Archivo",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;font-stretch:100%;text-rendering:optimizeLegibility}
img,svg{max-width:100%;display:block}
a{color:var(--river);text-decoration-thickness:1px;text-underline-offset:.18em}
a:hover{color:var(--deep)}
:focus-visible{outline:3px solid var(--signal);outline-offset:3px;border-radius:2px}
h1,h2,h3{font-stretch:116%;font-weight:640;line-height:1.08;letter-spacing:-.015em;margin:0;text-wrap:balance}
h1{font-size:clamp(2.3rem,5.4vw,4.3rem)}
h2{font-size:clamp(1.6rem,3vw,2.4rem)}
h3,.h3{font-size:1.3rem;line-height:1.2;letter-spacing:-.005em}
p{margin:0 0 1em;text-wrap:pretty}
ul.plain,ol.plain,.plain{list-style:none;margin:0;padding:0}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gut)}
.narrow{max-width:46rem}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--paper);padding:.6rem 1rem;z-index:20}
.skip:focus{left:0}
.lede{font-size:clamp(1.15rem,1.6vw,1.35rem);line-height:1.5;max-width:40rem;color:var(--muted)}
.tag{display:block;font-stretch:88%;font-weight:560;font-size:.9rem;color:var(--river);margin-bottom:.35rem}
.more{font-weight:560}

/* Buttons */
.btn{display:inline-block;background:var(--river);color:var(--white);font:inherit;font-weight:580;padding:.8rem 1.35rem;border:2px solid var(--river);border-radius:var(--r-s);text-decoration:none;cursor:pointer;line-height:1.2}
.btn:hover{background:var(--deep);border-color:var(--deep);color:var(--white)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.btn-signal{background:var(--signal);border-color:var(--signal);color:var(--signal-ink)}
.btn-signal:hover{background:#F4B73A;border-color:#F4B73A;color:var(--signal-ink)}
.btn-small{padding:.55rem 1rem;font-size:.95rem}
.actions{display:flex;flex-wrap:wrap;gap:.75rem;margin:1.75rem 0 0}

/* Masthead */
.masthead{position:sticky;top:0;z-index:10;background:rgba(243,246,244,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.masthead-in{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:4.25rem}
.brand{display:flex;align-items:center;gap:.65rem;color:var(--ink);text-decoration:none}
.brand-mark{width:2.1rem;height:2.1rem;color:var(--river);flex:none}
.brand-name{font-stretch:118%;font-weight:680;font-size:1.15rem;letter-spacing:-.01em;white-space:nowrap}
.site-nav{display:flex;align-items:center;gap:clamp(1rem,2.4vw,2rem)}
.site-nav a:not(.btn){color:var(--ink);text-decoration:none;font-weight:520;padding:.4rem 0;border-bottom:2px solid transparent}
.site-nav a:not(.btn):hover,.site-nav a[aria-current]{border-bottom-color:var(--signal)}
.nav-toggle{display:none;font:inherit;font-weight:580;background:none;border:2px solid var(--line-strong);border-radius:var(--r-s);padding:.45rem .9rem;color:var(--ink);cursor:pointer}
@media (max-width:820px){
  .masthead-in{flex-wrap:wrap;padding-block:.6rem}
  .site-nav{flex-wrap:wrap;gap:.25rem 1.25rem}
  .js .masthead-in{flex-wrap:nowrap;padding-block:0}
  .js .nav-toggle{display:block}
  .js .site-nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:.5rem var(--gut) 1.25rem}
  .js .site-nav.open{display:flex}
  .js .site-nav a:not(.btn){padding:.85rem 0;border-bottom:1px solid var(--line)}
  .js .site-nav .btn{margin-top:1rem;text-align:center}
}

/* Hero */
.hero{background:linear-gradient(180deg,var(--sky) 0%,var(--paper) 78%);padding-block:clamp(2.5rem,6vw,5rem) clamp(2.5rem,5vw,4rem);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(1.5rem,4vw,4rem);align-items:start}
.hero-copy h1{max-width:13ch}
.hero-copy .lede{margin-top:1.4rem;color:var(--ink)}
.hero-art{border-radius:var(--r-m);overflow:hidden;border:1px solid var(--line);background:var(--white)}
.key{list-style:none;counter-reset:k;margin:2.5rem 0 0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 1.5rem;border-top:1px solid var(--line-strong)}
.key li{counter-increment:k;border-bottom:1px solid var(--line)}
.key a{display:grid;grid-template-columns:1.9rem 1fr;gap:0 .6rem;padding:.7rem 0;color:var(--ink);text-decoration:none;line-height:1.3}
.key a::before{content:counter(k);grid-row:span 2;width:1.7rem;height:1.7rem;border-radius:50%;background:var(--ink);color:var(--paper);font-weight:620;font-size:.9rem;display:grid;place-items:center;margin-top:.1rem}
.key strong{font-weight:600}
.key span{grid-column:2;color:var(--muted);font-size:.95rem}
.key a:hover strong{text-decoration:underline;text-decoration-color:var(--signal);text-decoration-thickness:2px;text-underline-offset:.2em}
.key a:hover::before{background:var(--river)}
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .hero-art{max-width:30rem}
}
@media (max-width:520px){.key{grid-template-columns:1fr}}

/* Cross-section diagram */
.profile{width:100%;height:auto}
.pf-sky{fill:var(--sky)}
.pf-sun{fill:var(--signal)}
.pf-ray{stroke:var(--signal);stroke-width:1.5;stroke-dasharray:3 6;fill:none}
.pf-ground{fill:var(--silt)}
.pf-sat{fill:var(--river);opacity:.2}
.pf-water{fill:var(--river);opacity:.82}
.pf-wave{fill:none;stroke:var(--white);stroke-width:2;opacity:.7}
.pf-table{stroke:var(--river);stroke-width:2;stroke-dasharray:8 6;fill:none}
.pf-strata{stroke:var(--silt-dark);stroke-width:1.5;fill:none}
.pf-surface{stroke:var(--ink);stroke-width:2.5;fill:none;stroke-linejoin:round}
.pf-case{fill:var(--white);stroke:var(--ink);stroke-width:2}
.pf-ink{fill:var(--ink)}
.pf-mast{stroke:var(--ink);stroke-width:3;fill:none;stroke-linecap:round}
.pf-cable{stroke:var(--ink);stroke-width:1.5;fill:none}
.pf-sensor{fill:var(--signal);stroke:var(--ink);stroke-width:1.5}
.pf-signal{stroke:var(--river);stroke-width:2;fill:none;stroke-linecap:round}
.pf-rotor{fill:var(--ink);opacity:.45}
.pf-swath{stroke:var(--ink);stroke-width:1;stroke-dasharray:4 5;fill:none;opacity:.6}
.pf-swath-fill{fill:var(--signal);opacity:.16}
.pf-key circle{fill:var(--ink);stroke:var(--white);stroke-width:2.5}
.pf-key text{fill:var(--paper);font-size:15px;font-weight:640;text-anchor:middle}
.pf-key:hover circle,.pf-key:focus-visible circle{fill:var(--river)}
@media (prefers-reduced-motion:no-preference){
  .pf-key{opacity:0;animation:pf-in .5s ease-out forwards}
  .pf-key.k2{animation-delay:.35s}.pf-key.k1{animation-delay:.6s}.pf-key.k3{animation-delay:.85s}.pf-key.k4{animation-delay:1.1s}.pf-key.k5{animation-delay:1.35s}
  @keyframes pf-in{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:none}}
}

/* Bands */
.band{padding-block:clamp(3rem,7vw,5.5rem)}
.band-tight{padding-top:clamp(1.5rem,3vw,2.5rem)}
.band-sky{background:var(--sky)}
.band-deep{background:var(--deep);color:var(--paper)}
.head{max-width:44rem;margin-bottom:clamp(1.75rem,3vw,2.75rem)}
.head p{margin:1rem 0 0;font-size:1.15rem;color:var(--muted)}
.band-deep .head p{color:#B9D3D6}
.head-row{max-width:none;display:flex;align-items:baseline;justify-content:space-between;gap:1rem;flex-wrap:wrap}

/* Strata list (solutions on home) */
.strata{border-top:2px solid var(--ink)}
.strata li{border-bottom:1px solid var(--line)}
.strata a{display:grid;grid-template-columns:9rem minmax(0,5fr) minmax(0,6fr);gap:.25rem 2rem;align-items:baseline;padding:1.35rem 0;color:var(--ink);text-decoration:none}
.strata-layer{font-stretch:88%;font-weight:560;color:var(--river)}
.strata-title{font-stretch:116%;font-weight:640;font-size:clamp(1.25rem,2vw,1.6rem);line-height:1.15;letter-spacing:-.01em}
.strata-short{color:var(--muted)}
.strata a:hover{background:var(--white)}
.strata a:hover .strata-title{text-decoration:underline;text-decoration-color:var(--signal);text-decoration-thickness:3px;text-underline-offset:.2em}
@media (max-width:760px){.strata a{grid-template-columns:1fr;padding:1.1rem 0}}

/* Steps (a true sequence) */
.steps{list-style:none;counter-reset:s;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2.5rem 2.5rem}
.steps li{counter-increment:s;border-top:1px solid rgba(243,246,244,.3);padding-top:1.1rem}
.steps li::before{content:counter(s);display:block;font-stretch:118%;font-weight:680;font-size:2.4rem;line-height:1;color:var(--signal);margin-bottom:.8rem}
.steps h3{margin-bottom:.5rem}
.steps p{margin:0;color:#C9DEE0}
@media (max-width:860px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.steps{grid-template-columns:1fr;gap:1.75rem}}

/* Work */
.work{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:2.5rem 2rem}
.work-item{grid-column:span 6;color:var(--ink);text-decoration:none;display:block}
.work-lead{grid-column:span 12;display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:0 2rem;align-content:start}
.work-lead .cover{grid-row:1 / span 4;margin:0;height:100%;min-height:16rem}
.work-lead h3{font-size:clamp(1.5rem,2.6vw,2.1rem);line-height:1.1}
.work-lead .tag{align-self:end;margin-top:.5rem}
.work-even .work-item{grid-column:span 4}
.work-item h3,.work-item .h3{font-stretch:116%;font-weight:640;margin:0 0 .5rem}
.work-item p{color:var(--muted);margin:0}
.work-item:hover h3,.work-item:hover .h3{text-decoration:underline;text-decoration-color:var(--signal);text-decoration-thickness:3px;text-underline-offset:.2em}
.cover{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-m);margin-bottom:1rem;background:var(--sky)}
.cover-wide{aspect-ratio:16/9;margin-bottom:2rem}
@media (max-width:900px){.work-even .work-item{grid-column:span 6}.work-lead{grid-template-columns:1fr}.work-lead .cover{grid-row:auto;min-height:0;margin-bottom:1rem}}
@media (max-width:600px){.work-item,.work-even .work-item{grid-column:span 12}}
/* generated covers */
.pt-bg{fill:var(--deep)}
.pt-line{fill:none;stroke:var(--signal);stroke-width:3;stroke-linejoin:round;stroke-linecap:round}
.pt-faint{fill:none;stroke:#7FB1B6;stroke-width:1.5;opacity:.6}
.pt-dot{fill:var(--signal)}
.pt-cell{fill:#7FB1B6;opacity:.28}
.pt-box{fill:none;stroke:#7FB1B6;stroke-width:2}
.pt-bar{fill:#7FB1B6;opacity:.5}
.pt-hot{stroke:var(--signal);fill:var(--signal);fill-opacity:.25;opacity:1}
.pt-bar.pt-hot{fill-opacity:1;stroke:none}

/* Sectors */
.sectors{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:2rem;margin:0}
.sectors div{border-top:2px solid var(--ink);padding-top:1rem}
.sectors dt{font-stretch:116%;font-weight:640;font-size:1.2rem;margin-bottom:.5rem}
.sectors dd{margin:0;color:var(--muted)}
@media (max-width:900px){.sectors{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.sectors{grid-template-columns:1fr}}

/* Notes */
.notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2rem}
.notes li{border-top:2px solid var(--ink)}
.notes a{display:block;padding-top:1rem;color:var(--ink);text-decoration:none}
.notes h3,.notes .h3{margin:0 0 .5rem}
.notes p{color:var(--muted);margin:0}
.notes a:hover h3,.notes a:hover .h3{text-decoration:underline;text-decoration-color:var(--signal);text-decoration-thickness:3px;text-underline-offset:.2em}
.notes-list{grid-template-columns:1fr;max-width:48rem;gap:0}
.notes-list li{border-top:1px solid var(--line)}
.notes-list li:first-child{border-top:2px solid var(--ink)}
.notes-list a{padding:1.5rem 0}
@media (max-width:820px){.notes{grid-template-columns:1fr}}

/* CTA */
.cta{background:var(--river);color:var(--white);padding-block:clamp(2.5rem,5vw,4rem)}
.cta-in{display:flex;align-items:center;justify-content:space-between;gap:2rem;flex-wrap:wrap}
.cta h2{margin-bottom:.6rem}
.cta p{margin:0;max-width:38rem;color:#D3E6E8}

/* Inner pages */
.page-head{background:linear-gradient(180deg,var(--sky),var(--paper));padding-block:clamp(2.5rem,6vw,4.5rem) clamp(1.5rem,3vw,2.5rem)}
.page-head h1{font-size:clamp(2.1rem,4.6vw,3.6rem);max-width:20ch}
.page-head .lede{margin:1.2rem 0 0;color:var(--ink)}
.crumb{margin:0 0 1rem;font-weight:560}
.crumb a{text-decoration:none}
.crumb a::before{content:"\2039\00a0"}
.byline{color:var(--muted);margin:1.2rem 0 0}
.split{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,4fr);gap:clamp(2rem,5vw,5rem);align-items:start}
@media (max-width:860px){.split{grid-template-columns:1fr}}
.prose{max-width:44rem}
.prose h2{font-size:1.6rem;margin:2.4rem 0 .9rem}
.prose h3{margin:1.8rem 0 .6rem}
.prose>:first-child{margin-top:0}
.prose ul{padding-left:1.2rem;margin:0 0 1.2em}
.prose li{margin-bottom:.4em}
.prose li::marker{color:var(--river)}
.prose blockquote{margin:1.5rem 0;padding-left:1.2rem;border-left:3px solid var(--signal);font-size:1.15rem}
.prose code{background:var(--sky);padding:.1em .35em;border-radius:3px;font-size:.92em}
.caps{margin:0;display:grid;gap:0}
.caps div{border-top:1px solid var(--line);padding:1.1rem 0}
.caps dt{font-weight:640;font-stretch:112%;font-size:1.1rem;margin-bottom:.25rem}
.caps dd{margin:0;color:var(--muted)}
.side{background:var(--white);border:1px solid var(--line);border-radius:var(--r-m);padding:1.5rem 1.6rem}
.side h2{font-size:1.1rem;font-stretch:112%;letter-spacing:0;margin:1.6rem 0 .7rem}
.side h2:first-child{margin-top:0}
.side p:last-child{margin-bottom:0}
.ticks li{position:relative;padding:.45rem 0 .45rem 1.5rem;border-top:1px solid var(--line)}
.ticks li:first-child{border-top:0}
.ticks li::before{content:"";position:absolute;left:.1rem;top:.95rem;width:.6rem;height:.32rem;border-left:2px solid var(--river);border-bottom:2px solid var(--river);transform:rotate(-45deg)}
.facts{margin:0}
.facts div{padding:.6rem 0;border-top:1px solid var(--line)}
.facts div:first-child{border-top:0;padding-top:0}
.facts dt{font-stretch:88%;font-weight:560;font-size:.9rem;color:var(--muted)}
.facts dd{margin:0;font-weight:520}
.sol-row{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:1rem 3rem;padding:2.25rem 0;border-top:1px solid var(--line)}
.sol-row:first-child{border-top:2px solid var(--ink)}
.sol-row h2{font-size:clamp(1.5rem,2.4vw,2rem)}
.sol-row h2 a{color:var(--ink);text-decoration:none}
.sol-row h2 a:hover{text-decoration:underline;text-decoration-color:var(--signal);text-decoration-thickness:3px;text-underline-offset:.2em}
.chips{display:flex;flex-wrap:wrap;gap:.5rem;margin:1rem 0 1.2rem}
.chips li{border:1px solid var(--line-strong);border-radius:99px;padding:.2rem .8rem;font-size:.95rem}
@media (max-width:760px){.sol-row{grid-template-columns:1fr}}
.filter{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2.25rem}
.filter a{border:1px solid var(--line-strong);border-radius:99px;padding:.35rem 1rem;color:var(--ink);text-decoration:none;font-weight:520}
.filter a:hover{background:var(--white)}
.filter a[aria-current]{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.empty{font-size:1.15rem;color:var(--muted)}

/* Forms */
.form{display:grid;gap:1.25rem;max-width:44rem}
.field-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.25rem}
@media (max-width:600px){.field-pair{grid-template-columns:1fr}}
.field label{display:block;font-weight:580;margin-bottom:.35rem}
.opt{font-weight:400;color:var(--muted);font-size:.92rem}
.field input,.field select,.field textarea{width:100%;font:inherit;color:var(--ink);background:var(--white);border:1.5px solid var(--line-strong);border-radius:var(--r-s);padding:.7rem .8rem}
.field textarea{resize:vertical;min-height:9rem}
.field input:focus,.field select:focus,.field textarea:focus{outline:3px solid var(--signal);outline-offset:1px;border-color:var(--ink)}
.field [aria-invalid="true"]{border-color:var(--bad)}
.field-error{color:var(--bad);font-weight:560;margin:.35rem 0 0;font-size:.97rem}
.hint{color:var(--muted);font-size:.95rem;margin:.4rem 0 0}
.form .btn{justify-self:start}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.notice{border-radius:var(--r-m);padding:1.25rem 1.5rem;margin-bottom:1.5rem;border:1.5px solid;max-width:44rem}
.notice h2{font-size:1.4rem;margin-bottom:.5rem}
.notice p:last-child{margin-bottom:0}
.notice-ok{border-color:var(--ok);background:#E7F2EA}
.notice-bad{border-color:var(--bad);background:#FBEAE7}

/* Footer */
.footer{background:var(--ink);color:#C4D3D5;padding-top:clamp(2.5rem,5vw,4rem);font-size:.98rem}
.footer a{color:#E6EEEE;text-decoration:none}
.footer a:hover{text-decoration:underline;color:var(--white)}
.footer-grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,4fr) minmax(0,2fr) minmax(0,3fr);gap:2rem 2.5rem}
.footer-name{font-stretch:116%;font-weight:680;font-size:1.2rem;color:var(--white);margin-bottom:.6rem}
.footer-about p{max-width:22rem}
.footer-h{font-size:1rem;font-stretch:100%;font-weight:620;letter-spacing:0;color:var(--white);margin-bottom:.8rem}
.footer li{margin-bottom:.45rem;line-height:1.4}
.footer-base{margin-top:2.5rem;padding-block:1.25rem;border-top:1px solid rgba(243,246,244,.18);color:#9DB2B5}
@media (max-width:860px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:480px){.footer-grid{grid-template-columns:1fr}}

@media print{.masthead,.cta,.footer,.nav-toggle{display:none}body{background:#fff}}