:root{
  --paper:#F7F5F0;
  --paper-line:#E4DFD2;
  --ink:#16213D;
  --ink-soft:#445068;
  --gold:#B8955A;
  --gold-light:#C8A96E;
  --graphite:#7A8499;
  --card:#FFFFFF;
  --card-border:#DDD9CF;

  --dark-bg:#0F1419;
  --dark-line:#1E2D3D;
  --dark-ink:#E8E0D0;
  --dark-ink-soft:#B8CAD8;
  --dark-gold:#C8A96E;
  --dark-gold-light:#E0C898;
  --dark-graphite:#7A90A4;
  --dark-card:#141C26;
  --dark-card-border:#243040;

  --display:"Space Grotesk","Archivo",sans-serif;
  --body:"IBM Plex Sans","Inter",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
  --max:1120px;
  --gutter:24px;
}
@media(min-width:760px){:root{--gutter:48px;}}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important;}}

body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;}
h1,h2,h3,h4{font-family:var(--display);font-weight:600;margin:0 0 .5em;color:inherit;letter-spacing:-.01em;}
p{margin:0 0 1em;color:var(--ink-soft);}
a{color:var(--gold);}
.mono{font-family:var(--mono);}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter);}

/* ── LIGHT sections (default) ── */
section{padding:48px 0;border-top:1px solid var(--paper-line);background:var(--paper);}
section.tight{padding:32px 0;}

/* ── DARK sections ── */
.dark-section{
  background:var(--dark-bg);
  color:var(--dark-ink);
  border-top:none;
  background-image:linear-gradient(var(--dark-line) 1px,transparent 1px),linear-gradient(90deg,var(--dark-line) 1px,transparent 1px);
  background-size:100% 38px,38px 100%;
}
.dark-section h1,.dark-section h2,.dark-section h3,.dark-section h4{color:var(--dark-ink);}
.dark-section p{color:var(--dark-ink-soft);}
.dark-section .eyebrow{color:var(--dark-gold);}
.dark-section .eyebrow::before{background:var(--dark-gold);}
.dark-section .lede{color:var(--dark-ink-soft);}
.dark-section .state-block{border-color:var(--dark-card-border);}
.dark-section .state-block .tag{color:var(--dark-graphite);}
.dark-section .state-block .val{color:var(--dark-ink);}
.dark-section .state-arrow{color:var(--dark-gold);}
.dark-section .state-arrow .line{background:var(--dark-gold);}
.dark-section .schematic{background:var(--dark-card);border-color:var(--dark-card-border);}
.dark-section .btn{color:var(--dark-ink);border-color:var(--dark-card-border);}
.dark-section .btn:hover{background:var(--dark-card-border);border-color:var(--dark-gold);}
.dark-section .btn.primary{background:var(--dark-gold);color:var(--dark-bg);border-color:var(--dark-gold);}
.dark-section .btn.primary:hover{background:var(--dark-gold-light);border-color:var(--dark-gold-light);}
.dark-section .spec-list li{color:var(--dark-ink-soft);border-bottom-color:var(--dark-line);}
.dark-section .spec-list li::before{color:var(--dark-gold);}
.dark-section .title-block{border-color:var(--dark-card-border);color:var(--dark-graphite);}
.dark-section .title-block strong{color:var(--dark-gold);}

/* ── DARK metrics (used in both light and dark sections) ── */
.metrics{display:grid;gap:1px;background:var(--dark-card-border);border:1px solid var(--dark-card-border);grid-template-columns:repeat(2,1fr);}
@media(min-width:680px){.metrics{grid-template-columns:repeat(4,1fr);}}
.metric{background:var(--dark-card);padding:20px 16px;}
.metric .tag{font-family:var(--mono);font-size:10.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--dark-graphite);display:block;margin-bottom:6px;}
.metric .val{font-family:var(--display);font-size:clamp(20px,3vw,28px);font-weight:700;color:var(--dark-ink);}
.metric .val .from{color:var(--dark-graphite);font-weight:400;font-size:.75em;}
.metric .val .arrow{color:var(--dark-gold);margin:0 4px;}

/* ── EYEBROW ── */
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--gold);}

/* ── NAV ── */
.site-header{position:sticky;top:0;z-index:50;background:var(--dark-bg);border-bottom:1px solid var(--dark-card-border);}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--dark-ink);font-family:var(--display);font-weight:700;font-size:18px;}
.brand .mark{width:30px;height:30px;flex:none;border:1.5px solid var(--dark-gold);display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:12px;font-weight:700;color:var(--dark-gold);}
.brand small{display:block;font-family:var(--mono);font-weight:400;font-size:10.5px;letter-spacing:.08em;color:var(--dark-graphite);text-transform:uppercase;}
nav.primary{display:none;gap:28px;}
nav.primary a{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;text-decoration:none;color:var(--dark-ink-soft);padding:4px 0;border-bottom:1px solid transparent;}
nav.primary a:hover,nav.primary a.active{color:var(--dark-ink);border-bottom-color:var(--dark-gold);}
@media(min-width:880px){nav.primary{display:flex;align-items:center;}}
.menu-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:1.5px solid var(--dark-card-border);background:none;cursor:pointer;color:var(--dark-ink);}
@media(min-width:880px){.menu-btn{display:none;}}
.menu-btn svg{width:18px;height:18px;}
.mobile-nav{display:none;flex-direction:column;border-bottom:1px solid var(--dark-card-border);background:var(--dark-bg);}
.mobile-nav.open{display:flex;}
.mobile-nav a{padding:16px var(--gutter);text-decoration:none;font-family:var(--mono);font-size:13px;letter-spacing:.05em;text-transform:uppercase;color:var(--dark-ink);border-top:1px solid var(--dark-line);}
@media(min-width:880px){.mobile-nav{display:none!important;}}

/* ── HERO (dark) ── */
.hero{padding:56px 0 40px;}
@media(min-width:760px){.hero{padding:96px 0 64px;}}
.hero h1{font-size:clamp(32px,6vw,56px);line-height:1.05;max-width:14ch;}
.hero .lede{font-size:18px;max-width:52ch;}
.schematic{margin-top:40px;border:1px solid var(--dark-card-border);background:var(--dark-card);padding:20px;}
.schematic-row{display:flex;flex-direction:column;gap:18px;}
@media(min-width:680px){.schematic-row{flex-direction:row;align-items:stretch;gap:0;}}
.state-block{flex:1;padding:18px;border:1px dashed var(--dark-line);}
.state-block .tag{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--dark-graphite);display:block;margin-bottom:8px;}
.state-block .val{font-family:var(--display);font-weight:700;font-size:21px;color:var(--dark-ink);}
.state-arrow{display:flex;align-items:center;justify-content:center;padding:6px 0;color:var(--dark-gold);font-family:var(--mono);font-size:13px;}
@media(min-width:680px){.state-arrow{padding:0 14px;flex-direction:column;gap:6px;}.state-arrow .line{width:1px;flex:1;background:var(--dark-gold);}}
.state-arrow .line{height:1px;width:100%;background:var(--dark-gold);}

/* ── LIGHT section components ── */
.section-head{max-width:62ch;margin-bottom:32px;}
.section-head h2{font-size:clamp(24px,4vw,34px);}
.section-head .lede{color:var(--ink-soft);font-size:16.5px;}
.grid{display:grid;gap:18px;}
@media(min-width:680px){.grid.cols-2{grid-template-columns:1fr 1fr;}}
@media(min-width:880px){.grid.cols-3{grid-template-columns:repeat(3,1fr);}}
.card{border:1px solid var(--card-border);background:var(--card);padding:24px;}
.card .num{font-family:var(--mono);font-size:12px;color:var(--gold);display:block;margin-bottom:10px;}
.card h3{font-size:18px;margin-bottom:8px;color:var(--ink);}
.card p{font-size:14.5px;margin-bottom:0;}
.spec-list{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
.spec-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--ink-soft);padding-bottom:10px;border-bottom:1px solid var(--paper-line);}
.spec-list li::before{content:"—";color:var(--gold);font-family:var(--mono);flex:none;}
blockquote{border-left:2px solid var(--gold);margin:0;padding:4px 0 4px 20px;font-family:var(--display);font-size:19px;color:var(--ink);}

/* ── BUTTONS (light bg default) ── */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:13px;letter-spacing:.05em;text-transform:uppercase;padding:13px 22px;border:1.5px solid var(--card-border);text-decoration:none;color:var(--ink);background:transparent;cursor:pointer;transition:background .15s,color .15s,border-color .15s;}
.btn:hover{background:var(--paper-line);border-color:var(--gold);}
.btn.primary{background:var(--ink);color:var(--paper);border-color:var(--ink);}
.btn.primary:hover{background:var(--dark-bg);border-color:var(--dark-bg);}

.case{padding:26px 0;border-top:1px solid var(--paper-line);display:grid;gap:10px;}
.case h3{font-size:19px;color:var(--ink);}
.case .frame{font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--gold);}
.case p{font-size:15px;}
.cluster-label{font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--graphite);margin:36px 0 4px;}
.article-tile{border-top:1px solid var(--paper-line);padding:20px 0;}
.article-tile h3{font-size:17px;margin-bottom:6px;color:var(--ink);}
.article-tile p{font-size:14.5px;}

/* ── FORM ── */
form.contact-form{display:grid;gap:14px;max-width:560px;}
.form-row{display:grid;gap:14px;}
@media(min-width:560px){.form-row.two{grid-template-columns:1fr 1fr;}}
label{font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--graphite);display:block;margin-bottom:6px;}
input,textarea{width:100%;border:1px solid var(--card-border);background:var(--card);padding:12px;font-family:var(--body);font-size:15px;color:var(--ink);}
input:focus,textarea:focus,a:focus-visible,button:focus-visible{outline:2px solid var(--gold);outline-offset:2px;}
textarea{min-height:120px;resize:vertical;}
.form-status{font-family:var(--mono);font-size:13px;min-height:20px;}
.form-status.ok{color:#3C6E47;}
.form-status.err{color:#B85A16;}

/* ── FOOTER (dark) ── */
footer.site-footer{background:var(--dark-bg);border-top:1px solid var(--dark-card-border);margin-top:0;padding:40px 0 28px;}
.footer-grid{display:grid;gap:28px;}
@media(min-width:680px){.footer-grid{grid-template-columns:1.2fr 1fr 1fr;}}
.footer-grid h4{font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--dark-graphite);margin-bottom:10px;}
.footer-grid p{color:var(--dark-ink-soft);}
.footer-grid a{display:block;text-decoration:none;color:var(--dark-ink-soft);font-size:14.5px;margin-bottom:6px;}
.footer-grid a:hover{color:var(--dark-gold);}
.footer-bottom{margin-top:32px;padding-top:18px;border-top:1px solid var(--dark-line);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-family:var(--mono);font-size:11.5px;color:var(--dark-graphite);}

/* ── PAGE HERO (dark, sub-pages) ── */
.page-hero{padding:48px 0 40px;}
.page-hero .eyebrow{margin-bottom:18px;}
.page-hero h1{font-size:clamp(28px,5vw,44px);max-width:18ch;}
.page-hero .lede{max-width:60ch;}
.title-block{border:1px solid var(--card-border);padding:14px 18px;margin-top:24px;display:flex;flex-wrap:wrap;gap:8px 20px;font-family:var(--mono);font-size:11px;color:var(--graphite);text-transform:uppercase;letter-spacing:.06em;}
.title-block strong{color:var(--gold);}

/* ── PHOTO PLACEHOLDER ── */
.photo-placeholder{width:100%;aspect-ratio:3/4;max-width:240px;background:var(--card);border:1px dashed var(--card-border);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;font-family:var(--mono);font-size:11px;color:var(--graphite);text-transform:uppercase;letter-spacing:.08em;}
.photo-placeholder svg{width:40px;height:40px;opacity:.3;}