@property --c{syntax:'<color>';inherits:true;initial-value:#3A322C}

:root{
  --bg:#000000;
  --bg-2:#080705;
  --surface:#0F0C07;
  --surface-2:#171208;
  --line:rgba(205,163,53,.20);
  --line-soft:rgba(246,239,223,.085);
  --gold:#CDA335;
  --gold-lite:#F5DF85;
  --gold-mid:#E4C256;
  --gold-deep:#80570E;
  --copper:#B28420;
  --cream:#F6EFDF;
  --muted:#A2957A;
  --muted-2:#786C55;
  --disp:'Big Shoulders Display','Saira Condensed',Oswald,Impact,sans-serif;
  --body:'Barlow',system-ui,-apple-system,'Segoe UI',sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,'SF Mono',Menlo,monospace;
  --gut:clamp(20px,5vw,64px);
  --r:18px;--r-sm:12px;
  --max:1280px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--cream);
  font-family:var(--body);font-size:16.5px;line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(70% 50% at 82% -8%,rgba(205,163,53,.15),transparent 62%),
    radial-gradient(55% 45% at 4% 8%,rgba(128,87,14,.16),transparent 60%);
}
main,header,footer{position:relative;z-index:1}
img,svg{max-width:100%}
a{color:inherit}
.wrap{max-width:var(--max);margin:0 auto;padding-inline:var(--gut)}
.disp{font-family:var(--disp)}
.mono{font-family:var(--mono)}

h1,h2,h3{font-family:var(--disp);font-weight:700;line-height:1.03;text-transform:uppercase;letter-spacing:.015em;margin:0}
h2.sec{font-size:clamp(30px,4.6vw,52px);margin:0 0 16px}
.lede{color:var(--muted);font-size:clamp(16px,1.7vw,18.5px);line-height:1.65;max-width:60ch}

.eyebrow{
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--gold);display:flex;align-items:center;gap:11px;margin:0 0 18px;font-weight:500;
}
.eyebrow::before{content:"";width:24px;height:1px;background:linear-gradient(90deg,var(--gold),transparent);flex:none}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-family:var(--body);font-size:14.5px;font-weight:600;letter-spacing:.01em;
  text-decoration:none;padding:13px 26px;border-radius:999px;border:1px solid transparent;
  background:linear-gradient(180deg,var(--gold-lite),var(--gold-mid) 45%,var(--gold));color:#140F03;
  cursor:pointer;transition:transform .18s cubic-bezier(.2,.8,.3,1),box-shadow .18s,filter .18s;
  box-shadow:0 1px 0 rgba(255,255,255,.35) inset,0 8px 24px rgba(205,163,53,.20);
}
.btn:hover{transform:translateY(-2px);box-shadow:0 1px 0 rgba(255,255,255,.4) inset,0 12px 32px rgba(205,163,53,.34)}
.btn.ghost{background:transparent;color:var(--gold);border-color:rgba(205,163,53,.4);box-shadow:none}
.btn.ghost:hover{background:rgba(205,163,53,.1);border-color:var(--gold);box-shadow:none}
.btn[disabled]{opacity:.4;pointer-events:none;filter:grayscale(.5)}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:4px}

/* ---------- live standing seam renderer ---------- */
.seam{
  --c:#3A322C;position:relative;overflow:hidden;isolation:isolate;
  background:
    linear-gradient(100deg,rgba(255,255,255,0) 34%,rgba(255,255,255,.13) 45%,rgba(255,255,255,0) 56%),
    linear-gradient(180deg,rgba(255,255,255,.2),rgba(255,255,255,.03) 32%,rgba(0,0,0,.18) 76%,rgba(0,0,0,.34)),
    repeating-linear-gradient(90deg,
      color-mix(in srgb,var(--c),#000 42%) 0 2px,
      color-mix(in srgb,var(--c),#fff 30%) 2px 5px,
      color-mix(in srgb,var(--c),#fff 9%) 5px 9px,
      var(--c) 9px 74px,
      color-mix(in srgb,var(--c),#000 26%) 74px 78px);
  transition:--c .45s ease,background .45s ease;
}
.seam::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(130% 95% at 16% -5%,rgba(255,255,255,.15),transparent 55%);
}
@media(prefers-reduced-motion:reduce){*{transition-duration:.01ms!important;animation-duration:.01ms!important;scroll-behavior:auto}}

/* ---------- nav ---------- */
header.nav{
  position:sticky;top:0;z-index:60;
  background:rgba(0,0,0,.78);backdrop-filter:blur(16px) saturate(1.3);
  border-bottom:1px solid var(--line-soft);
}
.nav-in{display:flex;align-items:center;gap:18px;justify-content:space-between;
  max-width:var(--max);margin:0 auto;padding:11px var(--gut);min-width:0}
.short{display:none}
.logo{display:flex;align-items:center;text-decoration:none;flex:none;min-width:0}
.logomark{height:58px;width:auto;display:block;flex:none}
.f-logo{height:78px;width:auto;display:block;margin-bottom:20px}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{font-size:14px;font-weight:500;white-space:nowrap;color:var(--muted);text-decoration:none;padding:9px 15px;border-radius:999px;transition:color .16s,background .16s}
.nav-links a:hover{color:var(--cream);background:rgba(246,239,223,.06)}
@media(max-width:980px){.nav-links{display:none}}
.nav-cta{display:flex;align-items:center;gap:10px;flex:none}
@media(max-width:560px){.nav-cta .btn.ghost{display:none}}
@media(max-width:620px){
  .nav-in{gap:12px}
  .logomark{height:42px}
  .nav-cta .btn{padding:11px 18px;font-size:13.5px}
  .long{display:none}
  .short{display:inline}
}

/* ---------- hero ---------- */
.hero{padding-block:clamp(32px,4vw,52px) clamp(36px,4.5vw,60px);position:relative;overflow:hidden}
.hero-in{display:grid;grid-template-columns:1.06fr .94fr;gap:clamp(28px,5vw,64px);align-items:stretch}
@media(max-width:980px){.hero-in{grid-template-columns:1fr;gap:40px}}
.hero h1{font-size:clamp(38px,5.6vw,68px);letter-spacing:.01em;margin:0 0 18px;text-wrap:balance}
.hero h1 em{font-style:normal;display:block;
  background:linear-gradient(100deg,var(--gold-lite),var(--gold-mid) 38%,var(--gold) 62%,var(--gold-deep));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lede{margin:0 0 24px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.spec-strip{display:flex;flex-wrap:wrap;gap:22px 40px;padding-top:20px;border-top:1px solid var(--line-soft);margin:0}
.spec-strip dt{font-family:var(--mono);font-size:10px;letter-spacing:.17em;text-transform:uppercase;color:var(--muted-2);margin-bottom:6px}
.spec-strip dd{margin:0;font-family:var(--disp);font-size:23px;font-weight:600;color:var(--cream)}

/* color lab card */
.lab{
  display:flex;flex-direction:column;
  background:linear-gradient(165deg,var(--surface-2),var(--surface));
  border:1px solid var(--line);border-radius:var(--r);padding:20px;
  box-shadow:0 30px 70px -20px rgba(0,0,0,.85),0 0 0 1px rgba(255,255,255,.02) inset;
}
.lab-vis{flex:1 1 auto;min-height:230px;border-radius:var(--r-sm);box-shadow:0 14px 40px rgba(0,0,0,.5),0 0 0 1px rgba(255,255,255,.07) inset}
@media(max-width:520px){.lab-vis{min-height:180px}}
.lab-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin:18px 3px 2px}
.lab-head .k{font-family:var(--mono);font-size:10px;letter-spacing:.17em;text-transform:uppercase;color:var(--muted-2)}
.lab-head b{font-family:var(--disp);font-size:17px;font-weight:600;color:var(--cream)}

/* ---------- section shell ---------- */
section{padding-block:clamp(36px,4.5vw,60px)}
section[id]{scroll-margin-top:96px}   /* clear the sticky header on anchor jumps */
.sec-head{
  display:grid;grid-template-columns:minmax(0,1.04fr) minmax(0,.96fr);
  column-gap:clamp(28px,5vw,60px);align-items:end;
  margin-bottom:clamp(22px,3vw,34px);
}
.sec-head .eyebrow{grid-column:1/-1;margin-bottom:14px}
.sec-head h2.sec{margin:0}
.sec-head .lede{margin:0}
@media(max-width:900px){.sec-head{grid-template-columns:1fr;row-gap:12px;align-items:start}}

/* ---------- panels ---------- */
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:980px){.pgrid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.pgrid{grid-template-columns:1fr}}
.pcard{
  background:linear-gradient(170deg,var(--surface-2),var(--surface));
  border:1px solid var(--line-soft);border-radius:var(--r);overflow:hidden;
  transition:border-color .2s,transform .2s,box-shadow .2s;
}
.pcard:hover{border-color:var(--line);transform:translateY(-4px);box-shadow:0 24px 55px -24px rgba(0,0,0,.9)}
.pcard .pv{height:104px}
.pcard .pb{padding:18px 20px 22px}
.pcard .tag{font-family:var(--mono);font-size:9.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--gold-deep);display:block;margin-bottom:9px}
.pcard h3{font-size:21px;margin:0 0 4px}
.pcard .sub{font-size:13.5px;color:var(--muted);margin:0 0 15px}
.pcard dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:7px 14px;padding-top:14px;border-top:1px solid var(--line-soft)}
.pcard dt{font-family:var(--mono);font-size:9.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted-2);align-self:center}
.pcard dd{margin:0;font-size:13.5px;color:var(--cream);font-weight:500;text-align:right}

/* ---------- colors ---------- */
.cwrap{display:grid;grid-template-columns:.92fr 1.08fr;gap:clamp(26px,4vw,54px);align-items:start}
@media(max-width:960px){.cwrap{grid-template-columns:1fr}}
.cstage{position:sticky;top:100px}
@media(max-width:960px){.cstage{position:static}}
.cstage .cvis{height:260px;border-radius:var(--r);box-shadow:0 26px 60px -18px rgba(0,0,0,.85),0 0 0 1px rgba(255,255,255,.07) inset}
.cmeta{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:18px;
  background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-sm);padding:15px 18px}
.cmeta .nm{font-family:var(--disp);font-size:20px;font-weight:600}
.cmeta .hx{font-family:var(--mono);font-size:11.5px;color:var(--muted-2);letter-spacing:.08em;margin-top:3px}
.cmeta .fin{font-family:var(--mono);font-size:9.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--gold);
  border:1px solid rgba(205,163,53,.34);border-radius:999px;padding:6px 12px;white-space:nowrap}
.cgroup{margin-bottom:22px}
.cgroup h4{font-family:var(--mono);font-size:10.5px;letter-spacing:.17em;text-transform:uppercase;color:var(--muted-2);margin:0 0 14px;font-weight:500}
.chips{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media(max-width:520px){.chips{grid-template-columns:repeat(2,1fr)}}
.chip{
  border:none;padding:0;cursor:pointer;background:none;text-align:left;
  transition:transform .18s;border-radius:var(--r-sm);
}
.chip .sw{display:block;height:76px;border-radius:var(--r-sm);box-shadow:0 0 0 1px rgba(255,255,255,.10) inset,0 6px 18px rgba(0,0,0,.45);transition:box-shadow .18s}
.chip .cn{display:block;font-size:12.5px;color:var(--muted);margin-top:9px;line-height:1.35;transition:color .18s}
.chip:hover{transform:translateY(-3px)}
.chip:hover .cn{color:var(--cream)}
.chip.sel .sw{box-shadow:0 0 0 2px var(--gold),0 0 0 5px rgba(205,163,53,.2),0 6px 18px rgba(0,0,0,.45)}
.chip.sel .cn{color:var(--gold)}
.note{
  margin-top:22px;padding:16px 18px;border-radius:var(--r-sm);
  background:rgba(205,163,53,.06);border:1px solid rgba(205,163,53,.22);
  font-size:13.5px;color:#D9C9A8;line-height:1.6;
}

/* ---------- problems teaser ---------- */
.band{background:linear-gradient(180deg,transparent,rgba(128,87,14,.10) 40%,transparent)}
.qgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:26px}
@media(max-width:1000px){.qgrid{grid-template-columns:repeat(2,1fr)!important}}
@media(max-width:560px){.qgrid{grid-template-columns:1fr!important}}
.qcard{display:block;text-decoration:none;color:inherit;background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r);padding:24px 22px;transition:border-color .2s,transform .2s}
.qcard:hover{border-color:var(--line);transform:translateY(-3px)}
.qcard .ic{width:34px;height:34px;margin-bottom:16px;color:var(--gold)}
.qcard h3{font-size:18px;margin:0 0 8px;transition:color .2s}
a.qcard:hover h3{color:var(--gold)}
.qcard p{margin:0;font-size:14px;color:var(--muted);line-height:1.6}

/* ---------- quote form ---------- */
.qwrap{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(26px,4vw,54px);align-items:start}
@media(max-width:960px){.qwrap{grid-template-columns:1fr}}
.form{background:linear-gradient(170deg,var(--surface-2),var(--surface));border:1px solid var(--line);border-radius:var(--r);padding:clamp(22px,3vw,32px)}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:520px){.frow{grid-template-columns:1fr}}
.fld{display:flex;flex-direction:column;gap:7px;margin-bottom:15px}
.fld label{font-family:var(--mono);font-size:9.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted-2)}
.fld input,.fld select,.fld textarea{
  font-family:var(--body);font-size:14.5px;padding:12px 14px;color:var(--cream);
  background:rgba(0,0,0,.7);border:1px solid var(--line-soft);border-radius:var(--r-sm);
  transition:border-color .16s,box-shadow .16s;
}
.fld textarea{resize:vertical;min-height:84px}
.fld input::placeholder,.fld textarea::placeholder{color:var(--muted-2)}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(205,163,53,.16)}
.fld select option{background:var(--bg-2);color:var(--cream)}
.segs{display:flex;flex-wrap:wrap;gap:8px}
.seg{font-family:var(--body);font-size:13px;font-weight:500;padding:10px 17px;border-radius:999px;cursor:pointer;
  background:rgba(0,0,0,.7);border:1px solid var(--line-soft);color:var(--muted);transition:all .16s}
.seg:hover{border-color:rgba(205,163,53,.4);color:var(--cream)}
.seg.sel{background:linear-gradient(180deg,var(--gold-lite),var(--gold-mid) 45%,var(--gold));border-color:transparent;color:#140F03;font-weight:600}
.ticket{background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r);overflow:hidden;position:sticky;top:100px}
@media(max-width:960px){.ticket{position:static}}
.tk-vis{height:82px}
.tk-h{padding:16px 20px 13px;border-bottom:1px dashed var(--line);display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.tk-h b{font-family:var(--disp);font-size:16px;font-weight:600}
.tk-h span{font-family:var(--mono);font-size:10px;letter-spacing:.13em;color:var(--muted-2)}
.tk-b{padding:8px 20px 18px}
.tk-b div{display:flex;gap:14px;align-items:baseline;padding:8px 0;border-bottom:1px dotted rgba(246,239,223,.09)}
.tk-b div:last-child{border-bottom:none}
.tk-b dt{font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted-2);width:86px;flex:none}
.tk-b dd{margin:0;font-size:14px;font-weight:500;color:var(--cream)}
.tk-b dd.dim{color:var(--muted-2);font-weight:400;font-style:italic}
.tk-foot{padding:4px 20px 20px}
.formnote{font-size:12.5px;color:var(--muted-2);margin:14px 0 0;line-height:1.55}
.sent{display:none;text-align:center;padding:30px 20px}
.sent.on{display:block}
.sent .big{font-family:var(--disp);font-size:26px;font-weight:600;margin:14px 0 10px}
.sent p{color:var(--muted);font-size:14.5px;margin:0}

/* ---------- placeholder marker ---------- */
.tbd{
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:#F0C775;background:rgba(205,163,53,.13);border:1px dashed rgba(205,163,53,.45);
  border-radius:6px;padding:3px 9px;display:inline-block;
}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line-soft);padding-block:36px 28px}
.f-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:32px;margin-bottom:28px}
@media(max-width:760px){.f-grid{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.f-grid{grid-template-columns:1fr}}
.f-grid h5{font-family:var(--mono);font-size:10px;letter-spacing:.17em;text-transform:uppercase;color:var(--muted-2);margin:0 0 14px;font-weight:500}
.f-grid p,.f-grid a{font-size:14px;color:var(--muted);text-decoration:none;display:block;margin:0 0 9px;line-height:1.6}
.f-grid a:hover{color:var(--gold)}
.f-bot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:26px;border-top:1px solid var(--line-soft);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;color:var(--muted-2);text-transform:uppercase}

/* ================= ARTICLE / FIELD GUIDE ================= */
.ahero{padding-block:clamp(46px,7vw,88px) clamp(28px,4vw,46px);position:relative;overflow:hidden}
.ahero .seamband{position:absolute;left:-6%;right:-6%;top:-80px;height:210px;transform:rotate(-2.4deg);
  border-radius:0 0 28px 28px;opacity:.42;
  -webkit-mask-image:linear-gradient(180deg,#000 12%,rgba(0,0,0,.35) 62%,transparent 96%);
  mask-image:linear-gradient(180deg,#000 12%,rgba(0,0,0,.35) 62%,transparent 96%)}
.ahero .in{position:relative;z-index:2;max-width:70ch}
.ahero h1{font-size:clamp(36px,5.6vw,66px);letter-spacing:.01em;margin:0 0 20px;text-wrap:balance}
.ahero h1 em{font-style:normal;display:block;background:linear-gradient(100deg,var(--gold-lite),var(--gold-mid) 38%,var(--gold) 62%,var(--gold-deep));
  -webkit-background-clip:text;background-clip:text;color:transparent}

.alayout{display:grid;grid-template-columns:242px 1fr;gap:clamp(28px,5vw,64px);align-items:start;
  padding-bottom:clamp(50px,7vw,96px)}
@media(max-width:900px){.alayout{grid-template-columns:1fr}}
.toc{position:sticky;top:96px}
@media(max-width:900px){.toc{position:static;background:var(--surface);border:1px solid var(--line-soft);
  border-radius:var(--r);padding:20px 22px}}
.toc h5{font-family:var(--mono);font-size:10px;letter-spacing:.17em;text-transform:uppercase;
  color:var(--muted-2);margin:0 0 14px;font-weight:500}
.toc ol{list-style:none;margin:0;padding:0;counter-reset:t}
.toc li{counter-increment:t;margin-bottom:2px}
.toc a{display:flex;gap:11px;align-items:baseline;text-decoration:none;color:var(--muted);
  font-size:13.5px;line-height:1.45;padding:7px 11px;border-radius:9px;
  border-left:2px solid transparent;transition:color .16s,background .16s,border-color .16s}
.toc a::before{content:counter(t,decimal-leading-zero);font-family:var(--mono);font-size:10px;
  color:var(--muted-2);flex:none;transition:color .16s}
.toc a:hover{color:var(--cream);background:rgba(246,239,223,.05)}
.toc a.on{color:var(--gold);border-left-color:var(--gold);background:rgba(205,163,53,.07)}
.toc a.on::before{color:var(--gold)}

.prose{max-width:72ch;font-size:17px;line-height:1.72;color:#D8CFB9}
.prose > section{padding-top:14px;padding-bottom:0;margin-bottom:52px;scroll-margin-top:96px}
.prose h2{font-size:clamp(24px,3.2vw,34px);margin:0 0 18px;color:var(--cream);
  display:flex;gap:15px;align-items:baseline}
.prose h2 .num{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--gold);
  flex:none;position:relative;top:-2px}
.prose h3{font-family:var(--body);font-weight:600;text-transform:none;letter-spacing:0;
  font-size:18px;margin:30px 0 10px;color:var(--cream)}
.prose p{margin:0 0 17px}
.prose strong{color:var(--cream);font-weight:600}
.prose ul{margin:0 0 18px;padding:0;list-style:none}
.prose ul li{position:relative;padding-left:22px;margin-bottom:11px}
.prose ul li::before{content:"";position:absolute;left:2px;top:.62em;width:7px;height:2px;
  border-radius:2px;background:var(--gold);opacity:.75}
.prose a{color:var(--gold);text-decoration:underline;text-underline-offset:3px;
  text-decoration-color:rgba(205,163,53,.4);transition:text-decoration-color .16s}
.prose a:hover{text-decoration-color:var(--gold)}
.prose a.btn,.prose a.btn:hover{color:#140F03;text-decoration:none}
.prose hr{border:none;border-top:1px solid var(--line-soft);margin:44px 0}

.callout{background:linear-gradient(170deg,var(--surface-2),var(--surface));
  border:1px solid var(--line);border-left:3px solid var(--gold);border-radius:var(--r-sm);
  padding:20px 22px;margin:0 0 22px;font-size:15.5px;line-height:1.65}
.callout p:last-child{margin-bottom:0}
.callout .lbl{font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--gold);display:block;margin-bottom:9px}

.lead-in{font-size:19px;line-height:1.65;color:var(--muted);margin:0 0 34px;max-width:66ch}
.disclaimer{font-size:13.5px;color:var(--muted-2);line-height:1.6;background:rgba(246,239,223,.035);
  border:1px solid var(--line-soft);border-radius:var(--r-sm);padding:16px 18px;margin:0 0 40px}
.endcard{background:linear-gradient(165deg,var(--surface-2),var(--surface));border:1px solid var(--line);
  border-radius:var(--r);padding:clamp(26px,4vw,40px);margin-top:8px}
.endcard h3{font-size:clamp(22px,3vw,30px);margin:0 0 14px}
.endcard p{color:var(--muted);margin:0 0 22px;font-size:16px}
.sent p a{color:var(--gold);text-decoration:underline;text-underline-offset:3px}