/* Layout: technical drawing sheets on graph paper. Sticky title-block nav; one sheet per page of the original site, routed by #hash */
:root{
  --paper:#EDEFEA; --sheet:#F8F9F5; --ink:#1A2027; --ink-2:#4C5761; --rule:#CBD0C8; --grid:#DDE1DA;
  --accent:#2457A6; --accent-soft:#DFE7F3; --safety:#E8B300; --on-safety:#1A2027;
  --f-display:"Barlow Condensed","Arial Narrow",Arial,sans-serif;
  --f-body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#11151A; --sheet:#171C22; --ink:#E5E8E3; --ink-2:#A2ACB5; --rule:#2F3740; --grid:#1B2128;
  --accent:#86ABE8; --accent-soft:#1E2B40; --safety:#F2C230; --on-safety:#1A2027; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#11151A; --sheet:#171C22; --ink:#E5E8E3; --ink-2:#A2ACB5; --rule:#2F3740; --grid:#1B2128;
  --accent:#86ABE8; --accent-soft:#1E2B40; --safety:#F2C230; --on-safety:#1A2027; color-scheme:dark}

*{box-sizing:border-box}
html{scroll-padding-top:90px}
body{background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.62;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:28px 28px;background-attachment:fixed}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--ink)}
a{color:var(--accent);text-underline-offset:3px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
h1,h2,h3,h4{font-family:var(--f-display);text-wrap:balance;margin:0;line-height:1.05;letter-spacing:.01em}
p{margin:0;max-width:68ch}
.mono{font-family:var(--f-mono);font-size:12px;letter-spacing:.07em;text-transform:uppercase;color:var(--ink-2)}
.gut{padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}

/* Top bar */
.bar{position:sticky;top:env(safe-area-inset-top,0px);z-index:9;background:var(--ink);color:var(--sheet)}
.bar-in{max-width:1080px;margin:0 auto;display:flex;align-items:center;gap:20px;padding-block:10px}
.brand{font-family:var(--f-display);font-weight:700;font-size:22px;letter-spacing:.04em;text-transform:uppercase;color:var(--sheet);text-decoration:none;white-space:nowrap}
.brand span{color:var(--safety)}
.nav{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;min-width:0;flex:1}
.nav::-webkit-scrollbar{display:none}
.nav a{font-family:var(--f-mono);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--sheet);opacity:.72;text-decoration:none;padding:7px 10px;white-space:nowrap;border:1px solid transparent}
.nav a:hover{opacity:1}
.nav a[aria-current="page"]{opacity:1;border-color:var(--safety);color:var(--safety)}
.nav .sep{width:1px;background:var(--sheet);opacity:.2;margin:4px 6px;flex:none}

main{max-width:1080px;margin:0 auto;padding-block:28px 56px}
.view{display:flex;flex-direction:column;gap:26px}

/* Sheets */
.sheet{background:var(--sheet);border:1.5px solid var(--ink);position:relative;min-width:0}
.pad{padding:30px clamp(18px,4vw,44px)}
.tag{position:absolute;top:-1px;right:-1px;background:var(--ink);color:var(--sheet);font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;padding:4px 10px}
.crumbs{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.crumbs a{font-family:var(--f-mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;text-decoration:none}
.crumbs span{color:var(--ink-2);font-family:var(--f-mono);font-size:12px}
.page-h{display:flex;flex-direction:column;gap:12px}
.page-h h1{font-size:clamp(48px,8vw,88px);font-weight:700;text-transform:uppercase}
.page-h .dek{font-size:18px;color:var(--ink-2)}
.meta-row{display:flex;flex-wrap:wrap;gap:0;border-top:1px solid var(--ink);margin-top:8px}
.meta-row div{padding:10px 16px 10px 0;margin-right:16px;display:flex;flex-direction:column;gap:1px;border-right:1px solid var(--rule)}
.meta-row div:last-child{border-right:none}
.meta-row b{font-family:var(--f-display);font-size:20px;font-weight:600}

/* Home hero */
.hero{display:grid;grid-template-columns:1.55fr 1fr}
.hero-main{padding:36px clamp(18px,4vw,44px);border-right:1.5px solid var(--ink);display:flex;flex-direction:column;gap:18px;min-width:0}
.hero h1{font-size:clamp(56px,10vw,112px);font-weight:700;text-transform:uppercase}
.hero h1 span{display:block;color:var(--accent)}
.hero .dek{font-size:18px;color:var(--ink-2)}
.tblock{display:grid;grid-template-columns:1fr 1fr}
.tblock div{border-bottom:1px solid var(--ink);border-left:1px solid var(--rule);padding:10px 14px;display:flex;flex-direction:column;gap:2px;min-width:0}
.tblock div:nth-child(odd){border-left:none}
.tblock .wide{grid-column:span 2}
.tblock div:last-child{border-bottom:none}
.tblock b{font-family:var(--f-display);font-size:22px;font-weight:600;line-height:1.15;overflow-wrap:anywhere}
.cert{display:inline-flex;gap:8px;font-family:var(--f-mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;background:var(--safety);color:var(--on-safety);padding:5px 10px;align-self:flex-start}

/* Home: about + spec cards */
.two{display:grid;grid-template-columns:1.3fr 1fr;gap:34px}
.two > *{min-width:0}
h2.sec{font-size:clamp(32px,5vw,46px);font-weight:700;text-transform:uppercase;margin-bottom:14px}
.lead{font-size:18px}
.specs{display:grid;grid-template-columns:repeat(3,1fr);border-top:1.5px solid var(--ink)}
.spec{padding:20px clamp(14px,3vw,24px);border-left:1px solid var(--rule);display:flex;flex-direction:column;gap:12px;min-width:0}
.spec:first-child{border-left:none}
.spec h3{font-size:26px;font-weight:600;text-transform:uppercase}
.spec ul{margin:0;padding-left:18px}
.spec .thumb{aspect-ratio:16/9}

.figs{display:grid;grid-template-columns:repeat(4,1fr);border-top:1.5px solid var(--ink)}
.fig{padding:16px clamp(14px,3vw,22px);border-left:1px solid var(--rule);display:flex;flex-direction:column;gap:2px}
.fig:first-child{border-left:none}
.fig b{font-family:var(--f-display);font-size:40px;font-weight:700;line-height:1;font-variant-numeric:tabular-nums}
.fig span{font-size:14px;color:var(--ink-2)}

/* Index cards (links to subpages) */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.card{display:flex;flex-direction:column;border:1.5px solid var(--ink);background:var(--sheet);text-decoration:none;color:var(--ink);min-width:0;transition:transform .15s}
.card:hover{transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--ink)}
.card .ph{aspect-ratio:16/10;border-bottom:1.5px solid var(--ink)}
.card .ph .logo{position:absolute;left:10px;bottom:10px;width:38%;max-width:120px;height:auto;object-fit:contain;background:#fff;padding:6px 8px;border:1px solid var(--ink)}
.card .cb{padding:12px 14px 14px;display:flex;flex-direction:column;gap:4px}
.card h3{font-size:24px;font-weight:600;text-transform:uppercase}
.card p{font-size:14px;color:var(--ink-2);line-height:1.45}

/* Photos */
.ph{position:relative;overflow:hidden;background:var(--paper);max-width:100%}
.ph img{display:block;width:100%;height:100%;object-fit:cover}
.ph.empty{background-image:repeating-linear-gradient(135deg,var(--rule) 0 1px,transparent 1px 10px);display:flex;align-items:flex-end}
.ph.empty .pl{background:var(--sheet);border:1px solid var(--rule);margin:10px;padding:4px 8px;font-family:var(--f-mono);font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:var(--ink-2)}
figure{margin:0;display:flex;flex-direction:column;gap:6px;min-width:0}
figure .ph{border:1.5px solid var(--ink);aspect-ratio:4/3}
figure.natural .ph{aspect-ratio:auto}
figure.natural .ph img{height:auto;object-fit:contain}
figcaption{font-family:var(--f-mono);font-size:11.5px;letter-spacing:.04em;color:var(--ink-2)}
figcaption b{color:var(--accent);font-weight:500}
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}

/* Prose page body */
.body{display:flex;flex-direction:column;gap:30px}
.step{display:grid;grid-template-columns:110px 1fr;gap:20px;padding-top:22px;border-top:1px dashed var(--rule)}
.step:first-child{border-top:none;padding-top:0}
.step > *{min-width:0}
.step .k{font-family:var(--f-mono);font-size:12px;letter-spacing:.07em;color:var(--accent);padding-top:4px}
.step .k b{display:block;font-family:var(--f-display);font-size:34px;font-weight:700;color:var(--ink);letter-spacing:0;line-height:1}
.step .c{display:flex;flex-direction:column;gap:14px}
.step h3{font-size:26px;font-weight:600;text-transform:uppercase}
.step.wimg .c{display:grid;grid-template-columns:1fr minmax(220px,340px);gap:20px;align-items:start}
.step.wimg .txt{display:flex;flex-direction:column;gap:12px;min-width:0}
.step ul{margin:0;padding-left:18px;max-width:68ch}
.step li{margin-bottom:6px}

.file{display:inline-flex;align-items:center;gap:10px;border:1px solid var(--ink);padding:8px 12px;text-decoration:none;color:var(--ink);font-size:14px;align-self:flex-start;background:var(--paper);max-width:100%}
.file::before{content:"PDF";font-family:var(--f-mono);font-size:10px;background:var(--ink);color:var(--sheet);padding:2px 5px}
.file.mov::before{content:"MOV"}
.file span{overflow-wrap:anywhere}
.vid{display:inline-flex;align-items:center;gap:8px;font-family:var(--f-mono);font-size:12px;letter-spacing:.05em;text-transform:uppercase;text-decoration:none;color:var(--accent);border:1px solid var(--accent);padding:6px 10px;align-self:flex-start}
.vid::before{content:"";border-left:7px solid currentColor;border-top:5px solid transparent;border-bottom:5px solid transparent}
.vid:hover{background:var(--accent);color:var(--sheet)}
.note{border-left:3px solid var(--safety);padding:8px 14px;background:var(--paper);font-size:15px;max-width:68ch}

.divider{display:flex;align-items:center;gap:12px}
.divider::after{content:"";flex:1;height:1px;background:var(--ink)}

/* FluidSIM unit table */
.units{display:grid;grid-template-columns:repeat(2,1fr);border:1.5px solid var(--ink)}
.unit{padding:16px 18px;border-bottom:1px solid var(--rule);border-right:1px solid var(--rule);display:flex;gap:14px;min-width:0}
.unit:nth-child(2n){border-right:none}
.unit:nth-last-child(-n+2){border-bottom:none}
.unit .n{font-family:var(--f-display);font-size:30px;font-weight:700;line-height:1;color:var(--accent);min-width:34px;font-variant-numeric:tabular-nums}
.unit h3{font-size:21px;font-weight:600;margin-bottom:4px}
.unit p{font-size:15px;line-height:1.5}
.unit .pill{display:inline-block;font-family:var(--f-mono);font-size:10px;letter-spacing:.07em;background:var(--safety);color:var(--on-safety);padding:1px 6px;margin-bottom:6px}

/* Pager */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.pager a{border:1.5px solid var(--ink);background:var(--sheet);padding:14px 18px;text-decoration:none;color:var(--ink);display:flex;flex-direction:column;gap:2px;min-width:0}
.pager a:hover{background:var(--ink);color:var(--sheet)}
.pager a:hover .mono{color:var(--sheet)}
.pager a.next{text-align:right;grid-column:2}
.pager b{font-family:var(--f-display);font-size:24px;font-weight:600;text-transform:uppercase}

/* Contact */
.contact{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.contact h2{font-size:clamp(28px,4.5vw,40px);text-transform:uppercase}
.email{display:flex;align-items:center;gap:8px;flex-wrap:wrap;min-width:0}
.email code{font-family:var(--f-mono);font-size:15px;background:var(--paper);border:1px solid var(--rule);padding:8px 12px;user-select:all;overflow-wrap:anywhere}
.email button{font-family:var(--f-mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;background:var(--accent);color:var(--sheet);border:none;padding:10px 14px;cursor:pointer}
footer{font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;color:var(--ink-2);text-align:center;text-transform:uppercase;padding-bottom:28px}

@media (max-width:820px){
  .hero{grid-template-columns:1fr}
  .hero-main{border-right:none;border-bottom:1.5px solid var(--ink)}
  .two{grid-template-columns:1fr}
  .specs{grid-template-columns:1fr}
  .spec{border-left:none;border-top:1px solid var(--rule)}
  .spec:first-child{border-top:none}
  .figs{grid-template-columns:repeat(2,1fr)}
  .fig:nth-child(3){border-left:none}
  .fig:nth-child(n+3){border-top:1px solid var(--rule)}
  .step{grid-template-columns:1fr;gap:8px}
  .step .k b{display:inline;font-size:26px;margin-right:6px}
  .step.wimg .c{grid-template-columns:1fr}
  .units{grid-template-columns:1fr}
  .unit{border-right:none!important}
  .unit:nth-last-child(2){border-bottom:1px solid var(--rule)}
  .bar-in{gap:12px}
  .brand{font-size:18px}
}
@media (max-width:520px){ .pager{grid-template-columns:1fr} .pager a.next{grid-column:1} }
@media (prefers-reduced-motion:no-preference){
  .view{animation:in .28s ease-out}
  @keyframes in{from{opacity:.5;transform:translateY(4px)}to{opacity:1;transform:none}}
}
@media (prefers-reduced-motion:reduce){ .card{transition:none} }