/* ============================================================
   HYDCO Engineering — site-wide styles
   Palette from the brand mark: swoosh red on steel charcoal,
   drawing-blue secondary. Signature device: the engineering-
   drawing title block (mono annotations, sheet labels).
   ============================================================ */

:root{
  --bg:#17191d;
  --bg-2:#1b1e23;
  --card:#20242a;
  --card-hover:#252a31;
  --line:#2d3138;
  --line-2:#3a3f47;
  --text:#eef0f2;
  --text-soft:#c9cdd3;
  --muted:#99a0a9;
  --red:#e32526;
  --red-bright:#ff4344;
  --blue:#5b7fc7;
  --paper:#f2f1ec;
  --radius:10px;
  --radius-lg:16px;
  --wrap:1180px;
  --section-y:clamp(72px,9vw,128px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --display:'Archivo',system-ui,sans-serif;
  --body:'IBM Plex Sans',system-ui,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--body);
  font-size:16.5px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
::selection{background:var(--red);color:#fff}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 clamp(20px,4vw,40px)}

/* ---------- Type ---------- */
.h1{
  font-family:var(--display);
  font-weight:800;
  font-size:clamp(2.4rem,5.2vw,4.2rem);
  line-height:1.04;
  letter-spacing:-.02em;
  text-wrap:balance;
}
.h1 em,.h2 em{font-style:normal;color:var(--red-bright)}
.h2{
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(1.7rem,3.2vw,2.6rem);
  line-height:1.12;
  letter-spacing:-.015em;
  text-wrap:balance;
}
.h3{
  font-family:var(--display);
  font-weight:700;
  font-size:1.15rem;
  letter-spacing:-.005em;
  line-height:1.3;
}
.lede{
  font-size:clamp(1.02rem,1.4vw,1.18rem);
  color:var(--text-soft);
  max-width:62ch;
}
.muted{color:var(--muted)}
.small{font-size:.85rem}

/* Drawing-annotation eyebrow: mono label with red tick */
.eyebrow{
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
  display:inline-flex;
  align-items:center;
  gap:.65em;
}
.eyebrow::before{
  content:"";
  width:1.6em;height:2px;
  background:var(--red);
  flex:none;
}

/* ---------- Header ---------- */
header.site{
  position:fixed;inset:0 0 auto 0;z-index:60;
  transition:background .3s,border-color .3s;
  border-bottom:1px solid transparent;
}
header.site.scrolled{
  background:rgba(23,25,29,.92);
  backdrop-filter:blur(10px);
  border-bottom-color:var(--line);
}
header.site .row{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;height:76px;
}
.brand img{height:44px;width:auto}
nav.primary ul{display:flex;gap:6px}
nav.primary a{
  font-size:.92rem;font-weight:500;color:var(--text-soft);
  padding:9px 13px;border-radius:8px;
  transition:color .2s,background .2s;
}
nav.primary a:hover{color:var(--text);background:rgba(255,255,255,.06)}
nav.primary a[aria-current="page"]{color:var(--text)}
nav.primary a[aria-current="page"]{box-shadow:inset 0 -2px 0 var(--red)}
.header-cta{display:flex;align-items:center;gap:14px}
.btn{
  display:inline-flex;align-items:center;gap:.55em;
  font-family:var(--body);font-weight:600;font-size:.95rem;
  padding:12px 22px;border-radius:999px;
  border:1px solid var(--line-2);color:var(--text);
  transition:all .25s var(--ease);cursor:pointer;background:none;
}
.btn:hover{border-color:var(--text-soft);transform:translateY(-1px)}
.btn.primary{background:var(--red);border-color:var(--red);color:#fff}
.btn.primary:hover{background:var(--red-bright);border-color:var(--red-bright)}
.btn .arrow{transition:transform .25s var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}
.btn.sm{padding:9px 16px;font-size:.88rem}

.menu-toggle{
  display:none;background:none;border:0;cursor:pointer;
  width:40px;height:40px;flex-direction:column;justify-content:center;gap:6px;align-items:center;
}
.menu-toggle span{display:block;width:22px;height:2px;background:var(--text);transition:.25s}
.drawer{display:none}

/* ---------- Hero ---------- */
.hero{
  position:relative;min-height:88svh;
  display:flex;align-items:flex-end;
  padding:140px 0 72px;
  overflow:hidden;
}
.hero.short{min-height:62svh;padding-bottom:56px}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(23,25,29,.55) 0%,rgba(23,25,29,.18) 40%,rgba(23,25,29,.92) 100%),
    linear-gradient(90deg,rgba(23,25,29,.55),transparent 55%);
}
.hero .wrap{position:relative;z-index:2;width:100%}
.hero .eyebrow{color:var(--text-soft);margin-bottom:22px}
.hero .h1{max-width:17ch;margin-bottom:22px}
.hero .lede{margin-bottom:34px}
.hero .ctas{display:flex;gap:14px;flex-wrap:wrap}

/* Signature: engineering-drawing title block */
.titleblock{
  position:absolute;right:clamp(20px,4vw,40px);bottom:56px;z-index:2;
  border:1px solid rgba(255,255,255,.28);
  background:rgba(23,25,29,.72);
  backdrop-filter:blur(6px);
  font-family:var(--mono);font-size:.68rem;letter-spacing:.06em;
  color:var(--text-soft);
  min-width:240px;
}
.titleblock .tb-row{
  display:grid;grid-template-columns:82px 1fr;
  border-top:1px solid rgba(255,255,255,.16);
}
.titleblock .tb-row:first-child{border-top:0}
.titleblock .tb-row span{padding:7px 10px}
.titleblock .tb-row span:first-child{
  color:var(--muted);text-transform:uppercase;font-size:.6rem;
  border-right:1px solid rgba(255,255,255,.16);
  display:flex;align-items:center;
}
.titleblock .tb-row .tb-red{color:var(--red-bright)}

/* ---------- Sections ---------- */
.section{padding:var(--section-y) 0}
.section.tint{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{
  display:flex;justify-content:space-between;align-items:flex-end;
  gap:40px;margin-bottom:clamp(36px,5vw,56px);
}
.section-head .h2{max-width:22ch;margin-top:14px}
.section-head .right{max-width:38ch;color:var(--muted);font-size:.98rem}

/* Dimension-line stats (like a drawing dimension callout) */
.dims{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.dim{
  padding:28px 26px 24px;background:var(--card);
  border-left:1px solid var(--line);
  position:relative;
}
.dim:first-child{border-left:0}
.dim .num{
  font-family:var(--display);font-weight:800;
  font-size:clamp(1.7rem,2.6vw,2.3rem);letter-spacing:-.02em;
  display:flex;align-items:center;gap:.4em;
}
.dim .num::before,.dim .num::after{
  content:"";height:1px;background:var(--line-2);flex:1 1 6px;min-width:6px;
}
.dim .num::before{margin-right:.2em}
.dim .num::after{margin-left:.2em}
.dim .lbl{font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-top:10px}
.dims.five{grid-template-columns:repeat(5,1fr)}
.dims.five .dim{padding:26px 20px 22px}
.dims.five .num{font-size:clamp(1.3rem,1.75vw,1.75rem);white-space:nowrap}
.dims.five .lbl{font-size:.65rem}

/* Capability tiles */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.tile{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 28px;display:flex;flex-direction:column;
  transition:border-color .3s,transform .3s var(--ease),background .3s;
  position:relative;
}
a.tile:hover{border-color:var(--red);transform:translateY(-4px);background:var(--card-hover)}
.tile .h3{margin-bottom:10px}
.tile p{color:var(--muted);font-size:.95rem;flex:1}
.tile .link{margin-top:22px;font-size:.86rem;font-weight:600;color:var(--red-bright)}
.tile .tag{
  position:absolute;top:18px;right:18px;
  font-family:var(--mono);font-size:.62rem;letter-spacing:.12em;
  color:var(--muted);text-transform:uppercase;
}
.tile ul{margin-top:6px}
.tile ul li{
  padding:7px 0 7px 20px;position:relative;
  color:var(--text-soft);font-size:.95rem;
  border-top:1px solid var(--line);
}
.tile ul li:first-child{border-top:0}
.tile ul li::before{
  content:"";position:absolute;left:2px;top:1.05em;
  width:8px;height:2px;background:var(--red);
}

/* Feature splits */
.feature .grid{
  display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(40px,6vw,80px);
  align-items:center;
}
.feature .grid.image-left .visual{order:-1}
.feature .copy .eyebrow{margin-bottom:16px}
.feature .copy .h2{margin-bottom:18px}
.feature .copy .lede{margin-bottom:22px}
.feature .copy ul{margin:0 0 26px}
.feature .copy ul li{
  padding:9px 0 9px 26px;position:relative;color:var(--text-soft);
  border-top:1px solid var(--line);
}
.feature .copy ul li:first-child{border-top:0}
.feature .copy ul li::before{
  content:"";position:absolute;left:2px;top:1.25em;
  width:10px;height:2px;background:var(--red);
}
.visual{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);
}
.visual img{width:100%;height:100%;object-fit:cover}
.visual .cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:14px 18px 12px;
  font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--text-soft);
  background:linear-gradient(180deg,transparent,rgba(15,16,19,.85));
}

/* Photo cards (range grids) */
.cards{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}
.pcard{
  position:relative;overflow:hidden;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--card);
  transition:border-color .3s;
}
.pcard:hover{border-color:var(--red)}
.pcard.lg{grid-column:span 8;aspect-ratio:16/10}
.pcard.md,.pcard.sm{grid-column:span 4;aspect-ratio:4/5}
.pcard.half{grid-column:span 6;aspect-ratio:16/11}
.pcard .bg{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  transition:transform 1.1s var(--ease),filter .3s;
  filter:brightness(.82);
}
.pcard:hover .bg{transform:scale(1.05);filter:brightness(.95)}
.pcard::after{
  content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,transparent 45%,rgba(10,11,13,.88));
}
.pcard .label{
  position:absolute;left:22px;right:22px;bottom:20px;z-index:2;
}
.pcard .ttl{font-family:var(--display);font-weight:700;font-size:1.25rem;letter-spacing:-.01em}
.pcard .sub{color:var(--text-soft);font-size:.85rem;margin-top:3px}

/* Track record table */
.track{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.track .t-row{
  display:grid;grid-template-columns:1.1fr 1.6fr 1fr 1.6fr;
  border-top:1px solid var(--line);background:var(--card);
}
.track .t-row:first-child{border-top:0}
.track .t-row.head{background:var(--bg-2)}
.track .t-row>div{padding:18px 22px;font-size:.95rem}
.track .t-row.head>div{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);padding:12px 22px;
}
.track .t-row .c{font-weight:600;font-family:var(--display)}
.track .t-row .p{color:var(--muted)}

/* Standards strip */
.stds{display:flex;flex-wrap:wrap;gap:10px}
.std{
  font-family:var(--mono);font-size:.75rem;letter-spacing:.08em;
  padding:8px 14px;border:1px solid var(--line-2);border-radius:6px;
  color:var(--text-soft);background:var(--card);
}

/* Inline links inside body copy must not rely on colour alone (a11y) */
footer.site p a{text-decoration:underline;text-underline-offset:2px}

/* Platform logo badge (e.g. Xenon in the controls discipline) */
.platform-logo{
  display:block;margin-top:28px;height:64px;width:auto;max-width:100%;
  object-fit:contain;background:#fff;padding:11px 18px;border-radius:8px;
}

/* Logo strip */
.logo-strip{
  display:flex;align-items:center;justify-content:center;
  gap:clamp(14px,2vw,26px);flex-wrap:wrap;
}
.logo-strip img{
  height:72px;width:auto;max-width:210px;object-fit:contain;
  background:#fff;padding:12px 20px;border-radius:8px;
  opacity:.9;transition:opacity .3s;
}
.logo-strip img:hover{opacity:1}
.logo-strip .names{
  font-family:var(--mono);font-size:.8rem;letter-spacing:.1em;color:var(--muted);
}

/* CTA band */
.cta-band{
  position:relative;padding:var(--section-y) 0;overflow:hidden;
  text-align:center;
}
.cta-band .bg{position:absolute;inset:0}
.cta-band .bg img{width:100%;height:100%;object-fit:cover}
.cta-band .bg::after{content:"";position:absolute;inset:0;background:rgba(17,18,21,.88)}
.cta-band .wrap{position:relative;z-index:2}
.cta-band .h2{max-width:24ch;margin:18px auto 20px}
.cta-band .lede{margin:0 auto 34px}
.cta-band .ctas{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- Footer ---------- */
footer.site{
  border-top:1px solid var(--line);background:var(--bg-2);
  padding:64px 0 32px;margin-top:0;
}
footer.site .grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:44px;
}
footer.site .brand-col img{height:40px;width:auto;margin-bottom:18px}
footer.site .brand-col p{color:var(--muted);font-size:.92rem;max-width:34ch}
footer.site .brand-col a{color:var(--text-soft)}
footer.site .brand-col a:hover{color:var(--text)}
footer.site .col-head{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);margin-bottom:16px;font-weight:500;
}
footer.site ul li{margin-bottom:10px}
footer.site ul a{color:var(--text-soft);font-size:.92rem}
footer.site ul a:hover{color:var(--text)}
footer.site .legal{
  border-top:1px solid var(--line);padding-top:26px;
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.06em;color:var(--muted);
}

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

/* ---------- Responsive ---------- */
@media(max-width:1080px){
  .grid-3{grid-template-columns:1fr 1fr}
  .dims,.dims.five{grid-template-columns:1fr 1fr}
  .dim{border-top:1px solid var(--line)}
  .dim:nth-child(-n+2){border-top:0}
  .dim:nth-child(odd){border-left:0}
}
@media(max-width:920px){
  nav.primary{display:none}
  .header-cta .btn{display:none}
  .menu-toggle{display:flex}
  .drawer{
    display:block;position:fixed;inset:76px 0 auto 0;z-index:59;
    background:rgba(20,22,26,.98);border-bottom:1px solid var(--line);
    transform:translateY(-110%);transition:transform .35s var(--ease);
  }
  .drawer.open{transform:none}
  .drawer ul{padding:18px 24px 26px}
  .drawer a{display:block;padding:13px 4px;font-size:1.05rem;border-bottom:1px solid var(--line);color:var(--text-soft)}
  .feature .grid{grid-template-columns:1fr}
  .feature .grid.image-left .visual{order:0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px}
  .pcard.lg,.pcard.md{grid-column:span 12;aspect-ratio:16/10}
  .pcard.sm,.pcard.half{grid-column:span 6}
  .track .t-row{grid-template-columns:1fr 1.4fr}
  .track .t-row>div:nth-child(3),.track .t-row>div:nth-child(4){display:none}
  .track .t-row.head>div:nth-child(3),.track .t-row.head>div:nth-child(4){display:none}
  footer.site .grid{grid-template-columns:1fr 1fr}
  .titleblock{display:none}
}
@media(max-width:640px){
  .grid-3,.grid-2{grid-template-columns:1fr}
  .dims,.dims.five{grid-template-columns:1fr}
  .dim{border-left:0;border-top:1px solid var(--line)}
  .dim:first-child{border-top:0}
  .pcard.sm,.pcard.half{grid-column:span 12;aspect-ratio:16/10}
  .hero{min-height:76svh}
  footer.site .grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .pcard .bg,.btn,.btn .arrow{transition:none}
}
:focus-visible{outline:2px solid var(--red-bright);outline-offset:2px}