/* ==========================================================================
   GRIDSTONE - site stylesheet
   Palette is LOCKED: charcoal + bronze + cream. Never green.
   Brand tokens are isolated in :root below so Peta can retune in one place.
   ========================================================================== */
:root{
  --ink:#14161A;          /* black / charcoal          */
  --ink-2:#1d2126;
  --bronze:#A47438;       /* metallic bronze - primary */
  --patina:#6E4C22;
  --gold:#C9A35A;
  --sandstone:#C6A87A;
  --limestone:#ECE4D3;
  --parchment:#F6F1E8;
  --body:#2c2a26;
  --muted:#6b6459;
  --rule:#ddd3bf;
  --serif:Georgia,"Times New Roman",serif;
  --sans:"Segoe UI",system-ui,-apple-system,Helvetica,Arial,sans-serif;
  --wrap:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--parchment);color:var(--body);
  font-family:var(--sans);font-size:16.5px;line-height:1.65;
  -webkit-font-smoothing:antialiased}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 26px}
a{color:var(--patina)}
img{max-width:100%}

/* ---------- masthead (canonical Gridstone banner) ---------- */
header.masthead{background:linear-gradient(180deg,#15181c 0%,#191c20 60%,#1d2126 100%);
  color:#f3efe6;border-bottom:3px solid var(--bronze);position:relative;overflow:hidden;
  -webkit-print-color-adjust:exact;print-color-adjust:exact}
header.masthead::before{content:"";position:absolute;inset:0;opacity:.10;
  background-image:linear-gradient(var(--sandstone) 1px,transparent 1px),
                   linear-gradient(90deg,var(--sandstone) 1px,transparent 1px);
  background-size:34px 34px;
  -webkit-mask-image:radial-gradient(120% 90% at 80% 0%,#000 30%,transparent 75%);
  mask-image:radial-gradient(120% 90% at 80% 0%,#000 30%,transparent 75%)}
.mast-inner{position:relative;display:flex;align-items:center;justify-content:space-between;
  gap:24px;padding:18px 0;flex-wrap:wrap}
.logo-lockup{display:flex;align-items:center;gap:14px;text-decoration:none}
.logo-mark{height:52px;width:auto;flex:0 0 auto;display:block;
  filter:drop-shadow(0 2px 7px rgba(0,0,0,.45))}
.wordmark-img{height:26px;width:auto;display:block;
  filter:drop-shadow(0 1px 4px rgba(0,0,0,.4))}
nav.mainnav{display:flex;gap:26px;flex-wrap:wrap;align-items:center}
nav.mainnav a{color:#d8cfbe;text-decoration:none;font-size:13px;letter-spacing:.11em;
  text-transform:uppercase;padding-bottom:3px;border-bottom:1px solid transparent}
nav.mainnav a:hover,nav.mainnav a.here{color:#fff;border-bottom-color:var(--bronze)}
nav.mainnav a.cta{background:var(--bronze);color:#15181c;border:0;border-radius:3px;
  padding:9px 16px;font-weight:700}
nav.mainnav a.cta:hover{background:var(--gold)}
/* phone fold-away menu (Nathan 2026-10-22) - hidden on wider screens; without JS the full menu shows */
.navtoggle{display:none;align-items:center;gap:9px;background:none;cursor:pointer;
  border:1px solid rgba(198,168,122,.55);border-radius:3px;color:#e7d8bd;font:inherit;
  font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;padding:9px 13px}
.navtoggle svg{width:18px;height:13px;stroke:currentColor;stroke-width:2;fill:none}
.navtoggle:hover,.navtoggle[aria-expanded="true"]{border-color:var(--gold);color:#fff}
@media (max-width:760px){
  .js .navtoggle{display:inline-flex}
  .js .mast-inner{gap:14px 18px}
  .js .logo-mark{height:42px}
  .js .wordmark-img{height:19px}
  .js nav.mainnav{display:none;width:100%;flex-direction:column;align-items:flex-start;gap:16px;
    padding:6px 0 4px;border-top:1px solid rgba(198,168,122,.25);padding-top:16px}
  .js nav.mainnav.open{display:flex}
}

/* ---------- hero ---------- */
.hero{background:linear-gradient(180deg,#1d2126 0%,#23272d 55%,#2a2f35 100%);
  color:#f3efe6;position:relative;overflow:hidden;
  -webkit-print-color-adjust:exact;print-color-adjust:exact}
.hero::after{content:"";position:absolute;right:-90px;top:50%;transform:translateY(-50%);
  width:620px;height:620px;opacity:.07;pointer-events:none;
  background:url("keystone.png") no-repeat center/contain}
.hero-inner{position:relative;padding:76px 0 82px;max-width:860px}
.kicker{font-size:11.5px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--sandstone);margin:0 0 16px;font-weight:600}
.hero h1{font-family:var(--serif);font-weight:600;font-size:52px;line-height:1.08;
  margin:0 0 6px;color:#f7f3ea;letter-spacing:.005em}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero .sequence{font-family:var(--serif);font-size:23px;color:var(--sandstone);
  margin:14px 0 22px;letter-spacing:.06em}
.hero p.lede{font-size:18.5px;color:#cfc8ba;max-width:660px;margin:0 0 30px;line-height:1.62}
.btnrow{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.btn{display:inline-block;text-decoration:none;border-radius:3px;font-size:14.5px;
  padding:13px 26px;font-weight:700;letter-spacing:.03em}
.btn-primary{background:var(--bronze);color:#15181c}
.btn-primary:hover{background:var(--gold)}
.btn-ghost{border:1px solid rgba(198,168,122,.45);color:#e7d8bd}
.btn-ghost:hover{border-color:var(--gold);color:#fff}
.hero-chips{display:flex;flex-wrap:wrap;gap:8px 10px;margin-top:34px}
.chip{display:inline-block;font-size:11.5px;padding:6px 12px;border-radius:20px;
  background:rgba(196,168,122,.14);color:#e7d8bd;border:1px solid rgba(196,168,122,.32)}
.chip b{color:#fff;font-weight:700}

/* ---------- sections ---------- */
section{padding:74px 0}
section.tint{background:var(--limestone)}
section.dark{background:var(--ink);color:#e9e2d4}
.sec-head{max-width:760px;margin:0 0 44px}
h2{font-family:var(--serif);font-weight:600;font-size:34px;line-height:1.2;
  margin:0 0 14px;color:var(--ink);letter-spacing:.01em}
section.dark h2{color:#f4efe4}
h2.caps{text-transform:uppercase;letter-spacing:.1em;font-size:27px}
.sec-head p{font-size:17.5px;color:var(--muted);margin:0}
section.dark .sec-head p{color:#b3aa9a}
h3{font-family:var(--serif);font-weight:600;font-size:21px;margin:0 0 9px;color:var(--ink)}
.eyebrow{font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--patina);font-weight:700;margin:0 0 12px}
section.dark .eyebrow{color:var(--sandstone)}

/* ---------- the superstructure sequence ---------- */
.seq{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin:0 0 8px;
  border:1px solid var(--rule);background:#fff}
.seq-step{padding:26px 22px;border-right:1px solid var(--rule);position:relative}
.seq-step:last-child{border-right:0}
.seq-step .n{font-family:var(--serif);font-size:13px;color:var(--bronze);
  letter-spacing:.2em;font-weight:700}
.seq-step h4{font-family:var(--serif);font-size:19px;margin:8px 0 6px;color:var(--ink)}
.seq-step p{font-size:14.5px;color:var(--muted);margin:0}
.handoffs{margin-top:34px;display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.handoff{background:#fff;border:1px solid var(--rule);border-left:3px solid var(--bronze);
  padding:20px 22px}
.handoff .hx{font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--bronze);font-weight:700;margin:0 0 7px}
.handoff p{margin:0;font-size:15px;color:var(--body)}

/* ---------- engine cards ---------- */
.engines{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.engine{background:#fff;border:1px solid var(--rule);padding:30px 30px 26px;
  display:flex;flex-direction:column;transition:border-color .15s,box-shadow .15s}
.engine:hover{border-color:var(--bronze);box-shadow:0 6px 24px rgba(20,22,26,.09)}
.engine .ename{font-family:var(--serif);font-size:27px;color:var(--ink);margin:0 0 4px}
.engine .ename span{color:var(--bronze)}
.engine .etag{font-size:14px;color:var(--patina);font-weight:600;margin:0 0 14px;
  letter-spacing:.02em}
.engine p{font-size:15.5px;color:var(--body);margin:0 0 16px}
.engine ul{margin:0 0 18px;padding-left:18px;font-size:14.5px;color:var(--muted)}
.engine ul li{margin-bottom:5px}
.engine .more{margin-top:auto;font-size:13px;letter-spacing:.1em;text-transform:uppercase;
  font-weight:700;color:var(--patina);text-decoration:none}
.engine .more:hover{color:var(--bronze)}
.status{display:inline-block;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  font-weight:700;padding:4px 10px;border-radius:2px;margin-left:10px;vertical-align:middle}
.status.live{background:rgba(164,116,56,.16);color:var(--patina);
  border:1px solid rgba(164,116,56,.4)}
.status.trial{background:#f2ece1;color:var(--muted);border:1px solid var(--rule)}

/* ---------- deliverable list ---------- */
.deliv{display:grid;grid-template-columns:repeat(2,1fr);gap:0 46px}
.deliv-item{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--rule)}
.deliv-item .num{font-family:var(--serif);font-size:26px;color:var(--bronze);
  line-height:1;flex:0 0 38px;font-weight:600}
.deliv-item h4{font-family:var(--serif);font-size:17.5px;margin:0 0 5px;color:var(--ink)}
.deliv-item p{margin:0;font-size:14.5px;color:var(--muted)}

/* ---------- steps ---------- */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.step{position:relative;padding-top:18px;border-top:2px solid rgba(196,168,122,.35)}
.step::before{counter-increment:s;content:"0" counter(s);font-family:var(--serif);
  font-size:13px;letter-spacing:.18em;color:var(--sandstone);font-weight:700}
.step h4{font-family:var(--serif);font-size:19px;margin:9px 0 7px;color:#f4efe4}
.step p{margin:0;font-size:14.5px;color:#b3aa9a}

/* ---------- plain feature grid ---------- */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.feat h3{margin-bottom:8px}
.feat p{margin:0;font-size:15.5px;color:var(--muted)}
section.dark .feat h3{color:#f4efe4}
section.dark .feat p{color:#b3aa9a}

/* ---------- honesty block ---------- */
.note{background:#fff;border:1px solid var(--rule);border-left:3px solid var(--bronze);
  padding:26px 30px;margin:0}
.note p{margin:0 0 12px;font-size:16px}
.note p:last-child{margin-bottom:0}
.note strong{color:var(--ink)}

/* ---------- table ---------- */
table.gs{width:100%;border-collapse:collapse;background:#fff;font-size:15px}
table.gs th{background:var(--ink);color:#f0ebdf;text-align:left;padding:13px 16px;
  font-size:12px;letter-spacing:.12em;text-transform:uppercase;font-weight:700;
  -webkit-print-color-adjust:exact;print-color-adjust:exact}
table.gs td{padding:13px 16px;border-bottom:1px solid var(--rule);vertical-align:top}
table.gs tbody tr:nth-child(even){background:#faf7f1}
table.gs td.lead{font-weight:600;color:var(--ink);white-space:nowrap}

/* ---------- contact ---------- */
.contact-card{background:var(--ink);color:#e9e2d4;padding:44px 46px;
  border-top:3px solid var(--bronze);-webkit-print-color-adjust:exact;print-color-adjust:exact}
.contact-card h2{color:#f4efe4;margin-bottom:10px}
.contact-card p{color:#b3aa9a;font-size:17px;max-width:620px}
.contact-card a.mail{color:var(--gold);font-family:var(--serif);font-size:23px;
  text-decoration:none;border-bottom:1px solid rgba(201,163,90,.4)}
.contact-card a.mail:hover{color:#fff}

/* ---------- footer ---------- */
footer.site{background:#0f1113;color:#8b8478;padding:44px 0 50px;font-size:13.5px}
footer.site .frow{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;
  align-items:flex-start}
footer.site a{color:#b3aa9a;text-decoration:none}
footer.site a:hover{color:var(--gold)}
footer.site .tagline{font-family:var(--serif);font-size:16px;color:var(--sandstone);
  letter-spacing:.14em;text-transform:uppercase}
footer.site .disclaim{margin-top:26px;padding-top:22px;border-top:1px solid #23262a;
  max-width:820px;line-height:1.7;color:#6f6a60}
.flinks{display:flex;gap:22px;flex-wrap:wrap}

/* ---------- engine page bits ---------- */
.crumb{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--sandstone);
  margin:0 0 14px}
.crumb a{color:var(--sandstone);text-decoration:none}
.crumb a:hover{color:#fff}
.two-col{display:grid;grid-template-columns:1.55fr 1fr;gap:52px;align-items:start}
.side{background:#fff;border:1px solid var(--rule);padding:26px 28px}
.side h4{font-family:var(--serif);font-size:16px;margin:0 0 12px;color:var(--ink);
  text-transform:uppercase;letter-spacing:.08em}
.side ul{margin:0 0 20px;padding-left:17px;font-size:14.5px;color:var(--muted)}
.side ul:last-child{margin-bottom:0}
.side li{margin-bottom:6px}
.longform p{font-size:16.5px;margin:0 0 18px}
.longform ul{font-size:16px;padding-left:20px;margin:0 0 22px}
.longform li{margin-bottom:9px}
.longform h3{margin-top:34px}

/* ---------- front page (index.html) - added 29 Sep 2026 ---------- */
section.dark a{color:var(--gold)}
section.dark a:hover{color:#fff}
.hero.home::after{display:none}   /* the keystone is the hero figure here, not a watermark */
.hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:40px;
  align-items:center}
.hero.home .hero-inner{max-width:none;padding:72px 0 78px}
.hero-figure{margin:0;padding:26px 0}
.hero-figure svg{display:block;width:100%;height:auto;max-width:500px;margin-left:auto}
.kd-serif{font-family:var(--serif);fill:#C6A87A}
.kd-mono{font-family:Consolas,"SFMono-Regular",Menlo,monospace;fill:#C6A87A}

.minis{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--rule);
  background:#fff}
.mini{display:flex;flex-direction:column;align-items:flex-start;gap:6px;padding:26px 22px 24px;
  border-right:1px solid var(--rule);text-decoration:none;color:inherit;transition:background .15s}
.mini:last-child{border-right:0}
.mini:hover{background:#fbf8f2}
.mini-step{font-family:var(--serif);font-size:12.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--bronze);font-weight:700}
.mini-name{font-family:var(--serif);font-size:25px;color:var(--ink);line-height:1.2}
.mini-name span{color:var(--bronze)}
.mini-tag{font-size:14px;color:var(--patina);font-weight:600}
.mini .status{margin:8px 0 0}

.rules{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.rule{border-top:2px solid rgba(196,168,122,.35);padding-top:18px}
.rule .rn{font-family:var(--serif);font-size:30px;line-height:1;color:var(--gold);
  letter-spacing:.06em;margin:0 0 12px}
.rule h3{font-size:19px;color:#f4efe4;margin:0 0 8px}
.rule p{margin:0;font-size:14.5px;color:#b3aa9a}
.pull{margin:56px 0 0;padding:32px 0 0;border-top:1px solid rgba(196,168,122,.22);max-width:860px}
.pull p{font-family:var(--serif);font-style:italic;font-size:27px;line-height:1.42;
  color:#f4efe4;margin:0 0 16px}
.pull cite{font-style:normal;font-size:12px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--sandstone)}

.founders{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.founder{display:flex;gap:22px;align-items:flex-start;background:#fff;border:1px solid var(--rule);
  padding:28px 30px}
.initials{flex:0 0 64px;height:64px;display:flex;align-items:center;justify-content:center;
  background:var(--ink);color:var(--gold);font-family:var(--serif);font-size:22px;
  letter-spacing:.08em;border-bottom:3px solid var(--bronze);
  -webkit-print-color-adjust:exact;print-color-adjust:exact}
.founder h3{margin:0 0 2px}
.founder .role{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--patina);
  font-weight:700;margin:0 0 10px}
.founder p{margin:0;font-size:15.5px;color:var(--muted)}

@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:0}
  .hero.home .hero-inner{padding:54px 0 10px}
  .hero-figure{padding:0 0 44px}
  .hero-figure svg{max-width:380px;margin:0 auto}
  .minis{grid-template-columns:repeat(2,1fr)}
  .mini:nth-child(2n){border-right:0}
  .mini:nth-child(-n+2){border-bottom:1px solid var(--rule)}
  .rules{grid-template-columns:repeat(2,1fr)}
  .founders{grid-template-columns:1fr}
  .pull p{font-size:22px}
}
@media (max-width:600px){
  .hero-figure{display:none}
  .hero.home .hero-inner{padding-bottom:58px}
  .minis,.rules{grid-template-columns:1fr}
  .mini{border-right:0;border-bottom:1px solid var(--rule)}
  .mini:last-child{border-bottom:0}
  .founder{flex-direction:column;padding:24px}
}

@media (max-width:900px){
  .seq,.engines,.deliv,.steps,.grid3,.grid2,.handoffs,.two-col{grid-template-columns:1fr}
  .seq-step{border-right:0;border-bottom:1px solid var(--rule)}
  .hero h1{font-size:36px}
  .hero-inner{padding:54px 0 58px}
  nav.mainnav{gap:16px}
  .two-col{gap:34px}
  .contact-card{padding:32px 26px}
}
@media print{
  nav.mainnav,.btnrow{display:none}
  body{background:#fff}
}