/* Archstone — drawing-set redesign. See DESIGN.md; it is binding. */
:root{
  --vellum:#F4F5F2;
  --vellum-deep:#EBEDE8;
  --graphite:#20242B;
  --graphite-2:#575D66;
  --graphite-3:#6E737B;
  --hair:#D8DAD3;
  --print:#1C3D99;
  --print-deep:#152E75;
  --manw-red:#D63A2B;
  --panel:#0D0D0D;
  --display:'Archivo',Helvetica,Arial,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --r:2px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto;}}
body{
  font-family:var(--display);
  background:var(--vellum);
  color:var(--graphite);
  font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .18s ease-out,background .18s ease-out,border-color .18s ease-out;}
a:focus-visible,button:focus-visible{outline:2px solid var(--print);outline-offset:3px;}
img{max-width:100%;}
.sheet{max-width:1220px;margin:0 auto;padding:0 34px;}
@media(max-width:640px){
  .sheet{padding:0 20px;}
  .nav nav a:not(.ink){display:none;}
}

h1,h2,h3{font-weight:600;letter-spacing:-0.025em;line-height:1.02;}

/* mono annotation */
.ann{
  font-family:var(--mono);font-size:11.5px;font-weight:500;
  letter-spacing:.14em;text-transform:uppercase;color:var(--graphite-3);
}

/* ---------- nav ---------- */
.nav{border-bottom:1px solid var(--hair);background:var(--vellum);}
.nav .sheet{display:flex;align-items:center;height:62px;gap:34px;}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:17.5px;letter-spacing:-0.01em;}
.brand svg{width:21px;height:21px;display:block;}
.nav nav{margin-left:auto;display:flex;gap:26px;align-items:center;}
.nav nav a{font-size:15px;color:var(--graphite-2);}
.nav nav a:hover,.nav nav a[aria-current]{color:var(--graphite);}
.ink{
  display:inline-block;background:var(--graphite);color:var(--vellum);
  font-size:15px;font-weight:500;padding:10px 20px;border-radius:var(--r);
}
.ink:hover{background:var(--print-deep);color:var(--vellum);}
.nav .ink{padding:8px 16px;font-size:14px;}

/* ---------- rail sections ---------- */
.rail-sec{border-top:1px solid var(--hair);padding:96px 0;}
.rail-sec:first-of-type{border-top:none;}
.rail-grid{display:grid;grid-template-columns:170px minmax(0,1fr);gap:44px;align-items:start;}
.rail{position:sticky;top:24px;}
@media(max-width:860px){
  .rail-grid{grid-template-columns:1fr;gap:26px;}
  .rail{position:static;}
  .rail-sec{padding:70px 0;}
}

/* ---------- hero ---------- */
.hero{padding:88px 0 96px;}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center;}
.hero h1{font-size:clamp(46px,6.4vw,88px);margin:26px 0 28px;max-width:14ch;}
.hero .sub{font-size:19px;color:var(--graphite-2);max-width:36ch;margin-bottom:40px;}
.hero .row{display:flex;gap:24px;align-items:center;flex-wrap:wrap;}
.mono-link{
  font-family:var(--mono);font-size:14px;color:var(--graphite);
  border-bottom:1px solid var(--hair);padding-bottom:3px;
}
.mono-link:hover{border-color:var(--print);color:var(--print);}
.arch-fig{display:block;width:100%;height:auto;}
@media(max-width:860px){
  .hero-grid{grid-template-columns:1fr;gap:48px;}
  .hero{padding:64px 0 72px;}
  .arch-fig{max-width:420px;margin:0 auto;}
}

/* ---------- hero arch elevation ---------- */
.arch-fig .ln{stroke:var(--print);fill:none;}
.arch-fig .joint{stroke:var(--print);opacity:.45;}
.arch-fig .key{stroke:var(--print);}
.arch-fig .ctr{stroke:var(--graphite-3);opacity:.55;}
.arch-fig .dim{stroke:var(--graphite-3);}
.arch-fig text{
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;
  text-transform:uppercase;fill:var(--graphite-3);
}

/* ---------- steps (the four-stage sequence) ---------- */
.step{
  display:grid;grid-template-columns:170px minmax(0,.9fr) minmax(0,1.1fr);
  gap:44px;padding:46px 0;border-top:1px solid var(--hair);align-items:baseline;
}
.step:first-of-type{border-top:none;padding-top:0;}
.step:last-of-type{padding-bottom:0;}
.step .n{font-family:var(--mono);font-size:14px;font-weight:500;color:var(--print);font-variant-numeric:tabular-nums;}
.step h3{font-size:25px;}
.step p{color:var(--graphite-2);font-size:16.5px;max-width:54ch;}
@media(max-width:860px){
  .step{grid-template-columns:1fr;gap:12px;padding:34px 0;}
  .step>div:first-child{display:flex;gap:12px;align-items:baseline;}
  .step>div:first-child br{display:none;}
}

/* ---------- purpose ---------- */
.purpose h2{font-size:clamp(32px,4.2vw,52px);max-width:18ch;margin-bottom:22px;}
.purpose .lead{font-size:18.5px;color:var(--graphite-2);max-width:58ch;margin-bottom:58px;}
.principle{
  display:grid;grid-template-columns:76px minmax(0,1fr);gap:30px;
  border-top:1px solid var(--hair);padding:34px 0;max-width:820px;
}
.principle:first-of-type{border-top:none;padding-top:0;}
.principle:last-of-type{padding-bottom:0;}
.principle .n{font-family:var(--mono);font-size:14px;font-weight:500;color:var(--print);}
.principle p{font-size:17.5px;max-width:58ch;}
@media(max-width:640px){.principle{grid-template-columns:52px 1fr;gap:16px;}}

/* ---------- work ---------- */
.work h2{font-size:clamp(32px,4.2vw,52px);max-width:20ch;margin-bottom:58px;}
.workrow{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:60px;align-items:center;}
.worktag{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--manw-red);display:block;margin-bottom:16px;}
.workrow h3{font-size:clamp(27px,3vw,38px);margin-bottom:18px;}
.workrow p{color:var(--graphite-2);margin-bottom:30px;max-width:46ch;}
.dark-panel{
  background:var(--panel);border-radius:var(--r);
  display:flex;align-items:center;justify-content:center;
  padding:58px 44px;
}
.dark-panel img{width:100%;max-width:430px;height:auto;display:block;}
@media(max-width:860px){.workrow{grid-template-columns:1fr;gap:40px;}}

/* ---------- contact ---------- */
.contact h2{font-size:clamp(32px,4.2vw,52px);margin-bottom:24px;max-width:18ch;}
.contact-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:60px;align-items:start;}
.contact .lead{font-size:18.5px;color:var(--graphite-2);max-width:54ch;margin-bottom:38px;}
.contact .alt{margin-top:18px;font-family:var(--mono);font-size:13.5px;color:var(--graphite-3);}
.contact .alt a{color:var(--graphite-2);border-bottom:1px solid var(--hair);}
.contact .alt a:hover{color:var(--print);border-color:var(--print);}
.meta{font-size:15px;color:var(--graphite-2);line-height:1.65;}
.meta strong{display:block;font-family:var(--mono);font-size:11.5px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--graphite-3);margin-bottom:4px;}
.meta div+div{margin-top:24px;}
@media(max-width:860px){.contact-grid{grid-template-columns:1fr;gap:40px;}}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--hair);padding:30px 0 38px;}
footer .sheet{display:flex;gap:24px;align-items:baseline;flex-wrap:wrap;}
footer,footer a{font-family:var(--mono);font-size:12.5px;color:var(--graphite-3);}
footer nav{margin-left:auto;display:flex;gap:22px;}
footer a:hover{color:var(--graphite);}

/* ---------- portfolio ---------- */
.pagehead{padding:88px 0 90px;}
.pagehead h1{font-size:clamp(42px,5.8vw,76px);margin:26px 0 26px;max-width:15ch;}
.pagehead .sub{font-size:18.5px;color:var(--graphite-2);max-width:56ch;}
.case h2{font-size:clamp(34px,4.4vw,54px);margin-bottom:26px;max-width:16ch;}
.case .lede{font-size:18.5px;color:var(--graphite-2);max-width:60ch;margin-bottom:64px;}
.case .lede strong{color:var(--graphite);font-weight:600;}

.gallery{display:grid;grid-template-columns:1.5fr 1fr;gap:18px;margin-bottom:84px;}
.gallery .cell{background:var(--panel);border-radius:var(--r);display:flex;align-items:center;justify-content:center;padding:46px;}
.gallery .cell.light{background:transparent;border:1px solid var(--hair);}
.gallery img{width:100%;max-width:470px;height:auto;display:block;}
.gallery .side{display:grid;gap:18px;}
.gallery .side .cell{padding:32px;}
.gallery .side img{max-width:340px;}
@media(max-width:860px){.gallery{grid-template-columns:1fr;}}

.prose{max-width:66ch;margin-bottom:76px;}
.prose h3{font-size:26px;margin:54px 0 18px;}
.prose h3:first-child{margin-top:0;}
.prose p{color:var(--graphite-2);margin-bottom:16px;}

.shipped h3{font-size:26px;margin-bottom:30px;}
.shipped ol{list-style:none;max-width:820px;}
.shipped li{
  display:grid;grid-template-columns:76px minmax(0,1fr);gap:30px;
  border-top:1px solid var(--hair);padding:19px 0;
  font-size:18px;font-weight:500;letter-spacing:-0.01em;
}
.shipped li:first-child{border-top:none;}
.shipped .n{font-family:var(--mono);font-size:13.5px;font-weight:500;color:var(--print);font-variant-numeric:tabular-nums;align-self:center;}
@media(max-width:640px){.shipped li{grid-template-columns:52px 1fr;gap:16px;}}

/* ---------- schedule ---------- */
.sched-shell{border:1px solid var(--hair);border-radius:var(--r);overflow:hidden;background:#fff;}
.sched-shell iframe{display:block;width:100%;height:760px;border:0;}
.sched-alt{margin-top:20px;font-family:var(--mono);font-size:13.5px;color:var(--graphite-3);}
.sched-alt a{color:var(--graphite-2);border-bottom:1px solid var(--hair);}
.sched-alt a:hover{color:var(--print);border-color:var(--print);}