/* ============================================================
   SeamShield — Evidence-grade infrastructure
   Institutional / authoritative system. Paper + ink, hairline
   grids, monospace custody labels, deep navy, one seal-red.
   ============================================================ */

:root{
  /* surfaces */
  --paper:#F2F1EC;        /* warm architectural white */
  --paper-2:#EBE9E2;      /* slightly deeper panel */
  --paper-3:#E4E2D9;      /* deepest paper */
  --ink:#121317;          /* near-black text */
  --ink-2:#3C3E45;        /* secondary */
  --muted:#62646C;        /* muted body */
  --faint:#8E9098;        /* faint / captions */
  --line:rgba(18,19,23,.16);
  --line-2:rgba(18,19,23,.28);
  --line-soft:rgba(18,19,23,.08);

  /* dark inverted surface */
  --dark:#0E0F12;
  --dark-2:#16181D;
  --dark-line:rgba(255,255,255,.14);
  --dark-line-soft:rgba(255,255,255,.07);
  --paper-on-dark:#EDECE6;
  --muted-on-dark:#9A9CA4;
  --faint-on-dark:#6A6C75;

  /* brand */
  --navy:#1B3A6B;         /* serious deep brand blue */
  --navy-2:#244B86;
  --navy-bright:#2C63B8;  /* interactive only, sparing */
  --seal:#B23A28;         /* rubber-stamp red, very sparing */
  --verify:#1E6E4F;       /* verification green, tiny signals */

  --maxw:1240px;
  --gutter:clamp(20px,4.5vw,56px);

  --sans:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --display:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"SF Mono",ui-monospace,Menlo,Monaco,Consolas,monospace;

  --ease:cubic-bezier(.22,1,.36,1);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
html,body{width:100%;max-width:100%;overflow-x:clip;}
::selection{background:var(--navy);color:#fff;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
h1,h2,h3,h4,h5{font-family:var(--display);font-weight:800;letter-spacing:-.02em;line-height:1.02;margin:0;}
p{margin:0;}

/* paper grain + faint blueprint grid behind everything */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(var(--line-soft) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(120% 90% at 50% 0%,#000 30%,transparent 75%);
          mask-image:radial-gradient(120% 90% at 50% 0%,#000 30%,transparent 75%);
}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:var(--maxw);min-width:0;margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter);position:relative;z-index:1;}
.section{padding:clamp(72px,10vh,128px) 0;position:relative;}
.section.tight{padding:clamp(56px,7vh,88px) 0;}
.divider{border:0;border-top:1px solid var(--line);margin:0;}

/* full-bleed hairline rules that align to container edges */
.rule{height:1px;background:var(--line);width:100%;}

/* ---------- type utilities ---------- */
.label{
  font-family:var(--mono);font-weight:500;font-size:11.5px;
  letter-spacing:.22em;text-transform:uppercase;color:var(--muted);
  display:inline-flex;align-items:center;gap:10px;
}
.label .tick{width:7px;height:7px;border:1px solid var(--navy);background:var(--navy);transform:rotate(45deg);flex:none;}
.label.on-dark{color:var(--muted-on-dark);}
.label.on-dark .tick{border-color:#5C84C4;background:#5C84C4;}

.idx{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--faint);}

.kicker{font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--navy);}

.h-xl{font-size:clamp(40px,6.6vw,82px);line-height:.96;letter-spacing:-.03em;}
.h-lg{font-size:clamp(32px,4.6vw,58px);line-height:1.0;letter-spacing:-.025em;}
.h-md{font-size:clamp(24px,3vw,38px);line-height:1.04;letter-spacing:-.02em;}
.h-sm{font-size:clamp(20px,2.1vw,26px);line-height:1.1;letter-spacing:-.015em;}

.lede{font-size:clamp(17px,1.5vw,20px);line-height:1.55;color:var(--ink-2);max-width:60ch;font-weight:400;}
.muted{color:var(--muted);}
.serif-quote{font-family:var(--sans);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;cursor:pointer;
  font-family:var(--sans);font-weight:600;font-size:15px;letter-spacing:-.01em;
  padding:13px 20px;border:1px solid transparent;border-radius:3px;
  transition:background .2s var(--ease),color .2s,border-color .2s,transform .2s var(--ease);
}
.btn svg{width:15px;height:15px;flex:none;}
.btn-primary{background:var(--ink);color:var(--paper);}
.btn-primary:hover{background:#000;transform:translateY(-1px);}
.btn-ghost{background:transparent;border-color:var(--line-2);color:var(--ink);}
.btn-ghost:hover{border-color:var(--ink);background:rgba(18,19,23,.04);}
.btn-lg{padding:16px 26px;font-size:16px;}
.on-dark .btn-primary,.btn-primary.on-dark{background:var(--paper);color:var(--ink);}
.on-dark .btn-primary:hover,.btn-primary.on-dark:hover{background:#fff;}
.on-dark .btn-ghost,.btn-ghost.on-dark{border-color:var(--dark-line);color:var(--paper-on-dark);}
.on-dark .btn-ghost:hover,.btn-ghost.on-dark:hover{border-color:rgba(255,255,255,.5);background:rgba(255,255,255,.05);}
.link-arrow{font-family:var(--mono);font-size:13px;letter-spacing:.04em;color:var(--navy);display:inline-flex;align-items:center;gap:8px;border-bottom:1px solid transparent;padding-bottom:1px;transition:gap .2s var(--ease),border-color .2s;}
.link-arrow svg{width:14px;height:14px;transition:transform .25s var(--ease);}
.link-arrow:hover{border-color:var(--navy);}
.link-arrow:hover svg{transform:translateX(3px);}

/* ---------- seal / stamp device ---------- */
.seal{
  font-family:var(--mono);font-weight:600;letter-spacing:.18em;text-transform:uppercase;
  font-size:11px;color:var(--seal);border:1.5px solid var(--seal);
  padding:8px 12px;display:inline-flex;align-items:center;gap:8px;border-radius:2px;
  transform:rotate(-3.5deg);position:relative;opacity:.9;
  box-shadow:inset 0 0 0 3px rgba(178,58,40,.0);
}
.seal::before{content:"";width:9px;height:9px;border:1.5px solid var(--seal);border-radius:50%;flex:none;}

/* ---------- corner crop-mark frame ---------- */
.framed{position:relative;}
.framed::before,.framed::after{content:"";position:absolute;width:12px;height:12px;pointer-events:none;}
.framed::before{top:-1px;left:-1px;border-top:1.5px solid var(--ink);border-left:1.5px solid var(--ink);}
.framed::after{bottom:-1px;right:-1px;border-bottom:1.5px solid var(--ink);border-right:1.5px solid var(--ink);}

/* ============================================================
   NAV
   ============================================================ */
.nav{position:sticky;top:0;z-index:60;background:rgba(242,241,236,.82);backdrop-filter:blur(14px) saturate(130%);border-bottom:1px solid var(--line);}
.nav-inner{display:flex;align-items:center;gap:28px;height:82px;}
.brand,.nav-links a,.nav-right .btn,.nav-status{white-space:nowrap;}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:800;font-size:19px;letter-spacing:-.02em;color:var(--ink);}
.brand .mark{width:25px;height:28px;flex:none;color:var(--ink);}
.brand-logo{height:58px;width:auto;display:block;flex:none;}
.brand .mark-img{height:30px;width:auto;flex:none;display:block;}
.brand b{color:var(--navy);font-weight:800;}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:8px;}
.nav-links a{font-size:14.5px;color:var(--ink-2);font-weight:500;position:relative;padding:4px 0;transition:color .2s;}
.nav-links a:hover,.nav-links a.active{color:var(--ink);}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--navy);}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px;}
.nav-status{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--muted);display:inline-flex;align-items:center;gap:7px;}
.nav-status .dot{width:7px;height:7px;border-radius:50%;background:var(--verify);box-shadow:0 0 0 3px rgba(30,110,79,.16);animation:pulse-dot 2.6s var(--ease) infinite;}
@keyframes pulse-dot{0%,100%{box-shadow:0 0 0 2px rgba(30,110,79,.18);}50%{box-shadow:0 0 0 5px rgba(30,110,79,.05);}}
.burger{display:none;background:none;border:1px solid var(--line-2);border-radius:3px;width:40px;height:38px;cursor:pointer;color:var(--ink);align-items:center;justify-content:center;}
.burger svg{width:18px;height:18px;}

/* mobile menu */
.mobile-menu{display:none;position:fixed;inset:66px 0 0;z-index:55;background:var(--paper);padding:24px var(--gutter);flex-direction:column;gap:4px;}
.mobile-menu.open{display:flex;}
.mobile-menu a{font-family:var(--display);font-weight:700;font-size:26px;letter-spacing:-.02em;padding:16px 0;border-bottom:1px solid var(--line);}
.mobile-menu .btn{margin-top:20px;justify-content:center;}

/* ============================================================
   HERO (home)
   ============================================================ */
.hero{padding-top:clamp(48px,7vh,86px);padding-bottom:clamp(56px,8vh,96px);}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(420px,.98fr);gap:clamp(32px,4vw,64px);align-items:center;}
.hero h1{margin:22px 0 0;}
.hero .lede{margin-top:24px;}
.hero-cta{display:flex;gap:12px;margin-top:34px;flex-wrap:wrap;}
.hero-meta{display:flex;gap:0;margin-top:40px;border-top:1px solid var(--line);}
.hero-meta .m{padding:18px 24px 0 0;margin-right:24px;border-right:1px solid var(--line);}
.hero-meta .m:last-child{border-right:0;}
.hero-meta .m .k{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);}
.hero-meta .m .v{font-family:var(--display);font-weight:700;font-size:15px;margin-top:5px;letter-spacing:-.01em;}

/* ============================================================
   CUSTODY RECORD CARD (hero visual) — looks like a dossier
   ============================================================ */
.record{
  background:var(--paper);border:1px solid var(--line-2);border-radius:5px;
  box-shadow:0 1px 0 rgba(255,255,255,.6) inset, 0 30px 60px -42px rgba(18,19,23,.5);
  overflow:hidden;position:relative;
}
.record-top{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--line);background:var(--paper-2);}
.record-top .rt-id{font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;color:var(--muted);}
.record-top .rt-status{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--verify);display:inline-flex;align-items:center;gap:7px;}
.record-top .rt-status .d{width:6px;height:6px;border-radius:50%;background:var(--verify);}
.record-body{padding:6px 0;}
.chain-step{display:grid;grid-template-columns:30px 1fr auto;align-items:center;gap:14px;padding:13px 20px;position:relative;}
.chain-step + .chain-step{border-top:1px solid var(--line-soft);}
.chain-node{position:relative;display:flex;align-items:center;justify-content:center;}
.chain-node i{width:11px;height:11px;border-radius:50%;background:var(--paper);border:2px solid var(--navy);z-index:1;}
.chain-step.done .chain-node i{background:var(--navy);}
.chain-node::after{content:"";position:absolute;top:18px;left:50%;transform:translateX(-50%);width:2px;height:30px;background:var(--line-2);}
.chain-step:last-child .chain-node::after{display:none;}
.chain-main .cs-t{font-family:var(--display);font-weight:700;font-size:14.5px;letter-spacing:-.01em;}
.chain-main .cs-d{font-family:var(--mono);font-size:11px;color:var(--muted);margin-top:2px;letter-spacing:.02em;}
.chain-step .cs-hash{font-family:var(--mono);font-size:11px;color:var(--faint);text-align:right;}
.chain-step .cs-ok{color:var(--verify);}
.record-foot{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-top:1px solid var(--line);background:var(--paper-2);}
.record-foot .rf-l{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--muted);}
.record .stamp{position:absolute;right:18px;bottom:64px;}

/* ============================================================
   LOGO / PROOF STRIP
   ============================================================ */
.proofbar{display:flex;align-items:center;gap:clamp(24px,4vw,56px);flex-wrap:wrap;}
.proofbar .pl{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--faint);}
.proofbar .logos{display:flex;align-items:center;gap:clamp(22px,3.5vw,48px);flex-wrap:wrap;}
.proofbar .logos span{font-family:var(--display);font-weight:700;font-size:18px;letter-spacing:-.01em;color:var(--ink-2);opacity:.78;}

/* ============================================================
   GENERIC SECTION HEAD
   ============================================================ */
.sec-head{display:grid;grid-template-columns:auto 1fr;gap:clamp(28px,5vw,72px);align-items:start;}
.sec-head .sh-no{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--faint);padding-top:8px;white-space:nowrap;}
.sec-head .sh-main{max-width:780px;}
.sec-head h2{margin:14px 0 0;}
.sec-head .lede{margin-top:18px;}

/* ============================================================
   THREAT / FEATURE LEDGER ROWS
   ============================================================ */
.ledger{border-top:1px solid var(--ink);margin-top:48px;}
.ledger-row{display:grid;grid-template-columns:64px 1fr 1.3fr auto;gap:clamp(18px,3vw,44px);align-items:start;padding:26px 0;border-bottom:1px solid var(--line);transition:background .25s;}
.ledger-row:hover{background:rgba(18,19,23,.025);}
.ledger-row .lr-no{font-family:var(--mono);font-size:12px;color:var(--seal);letter-spacing:.06em;padding-top:5px;}
.ledger-row .lr-title{font-family:var(--display);font-weight:700;font-size:clamp(18px,2vw,22px);letter-spacing:-.015em;}
.ledger-row .lr-desc{color:var(--muted);font-size:15px;line-height:1.55;}
.ledger-row .lr-tag{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);white-space:nowrap;padding-top:5px;}

/* ============================================================
   CARDS GRID (surfaces / features)
   ============================================================ */
.cards{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);margin-top:48px;}
.cards.c-3{grid-template-columns:repeat(3,1fr);}
.cards.c-2{grid-template-columns:repeat(2,1fr);}
.card{background:var(--paper);padding:34px 30px;display:flex;flex-direction:column;min-height:248px;transition:background .25s;position:relative;}
.card:hover{background:var(--paper-2);}
.card .c-no{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--faint);}
.card .c-icon{width:30px;height:30px;color:var(--navy);margin:0 0 20px;}
.card h3{font-size:21px;margin:0 0 10px;letter-spacing:-.018em;}
.card p{color:var(--muted);font-size:14.5px;line-height:1.55;margin:0 0 auto;}
.card .c-foot{margin-top:22px;font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-2);display:flex;align-items:center;gap:8px;}
.card .c-foot svg{width:13px;height:13px;color:var(--navy);}

/* ============================================================
   DARK SECTION
   ============================================================ */
.dark{background:var(--dark);color:var(--paper-on-dark);position:relative;}
.dark::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.4;
  background-image:linear-gradient(var(--dark-line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--dark-line-soft) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(120% 100% at 50% 0%,#000 20%,transparent 70%);
          mask-image:radial-gradient(120% 100% at 50% 0%,#000 20%,transparent 70%);
}
.dark h1,.dark h2,.dark h3,.dark h4{color:#fff;}
.dark .lede{color:var(--muted-on-dark);}
.dark .kicker{color:#6E97D6;}
.dark .sec-head .sh-no{color:var(--faint-on-dark);}
.dark .rule,.dark .divider{background:var(--dark-line);border-color:var(--dark-line);}
.dark .ledger{border-top-color:rgba(255,255,255,.5);}
.dark .ledger-row{border-bottom-color:var(--dark-line);}
.dark .ledger-row:hover{background:rgba(255,255,255,.03);}
.dark .ledger-row .lr-desc{color:var(--muted-on-dark);}
.dark .ledger-row .lr-tag{color:var(--faint-on-dark);}
.dark .label{color:var(--muted-on-dark);}
.dark .label .tick{border-color:#5C84C4;background:#5C84C4;}

/* ============================================================
   COMPARE (custody vs scanning)
   ============================================================ */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--dark-line);border:1px solid var(--dark-line);margin-top:48px;}
.compare .col{padding:34px 32px;background:var(--dark);}
.compare .col.us{background:#13161C;}
.compare .col h4{font-family:var(--mono);font-weight:500;font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--faint-on-dark);margin:0 0 22px;}
.compare .col.us h4{color:#6E97D6;}
.compare .row{display:flex;gap:13px;padding:15px 0;border-top:1px solid var(--dark-line-soft);font-size:15px;align-items:flex-start;line-height:1.45;}
.compare .row:first-of-type{border-top:0;}
.compare .row svg{width:17px;height:17px;flex:none;margin-top:3px;}
.compare .them .row{color:var(--muted-on-dark);}
.compare .them .row svg{color:var(--faint-on-dark);}
.compare .us .row{color:var(--paper-on-dark);}
.compare .us .row svg{color:#5C9B79;}

/* ============================================================
   PIPELINE DIAGRAM (platform) — institutional flow
   ============================================================ */
.pipeline{margin-top:52px;border:1px solid var(--line);background:var(--paper);position:relative;}
.pipeline-head{display:flex;justify-content:space-between;align-items:center;padding:13px 20px;border-bottom:1px solid var(--line);background:var(--paper-2);}
.pipeline-head .ph-t{font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);}
.pipeline-stages{display:grid;grid-template-columns:repeat(6,1fr);}
.pstage{padding:26px 18px 24px;border-right:1px solid var(--line);position:relative;}
.pstage:last-child{border-right:0;}
.pstage .ps-no{font-family:var(--mono);font-size:11px;color:var(--faint);letter-spacing:.1em;}
.pstage .ps-icon{width:24px;height:24px;color:var(--navy);margin:16px 0 14px;}
.pstage h4{font-size:15px;letter-spacing:-.01em;margin:0 0 7px;}
.pstage p{font-size:12.5px;color:var(--muted);line-height:1.5;margin:0;}
.pstage .ps-gate{margin-top:14px;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--verify);display:inline-flex;align-items:center;gap:6px;}
.pstage .ps-gate i{width:5px;height:5px;border-radius:50%;background:var(--verify);}
.pipeline-foot{display:flex;justify-content:space-between;align-items:center;padding:13px 20px;border-top:1px solid var(--line);background:var(--paper-2);font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--muted);}

/* ============================================================
   STAT BAND
   ============================================================ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--dark-line);border:1px solid var(--dark-line);}
.stat{padding:36px 28px;background:var(--dark);}
.stat .sv{font-family:var(--display);font-weight:800;font-size:clamp(34px,4vw,52px);letter-spacing:-.03em;color:#fff;line-height:1;}
.stat .sv .u{color:#6E97D6;}
.stat .sl{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-on-dark);margin-top:14px;}

/* light variant stat */
.stats.light{background:var(--line);border-color:var(--line);}
.stats.light .stat{background:var(--paper);}
.stats.light .stat .sv{color:var(--ink);}
.stats.light .stat .sv .u{color:var(--navy);}
.stats.light .stat .sl{color:var(--muted);}

/* ============================================================
   COMPLIANCE / STANDARDS GRID
   ============================================================ */
.standards{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:46px;}
.std{background:var(--paper);padding:26px 22px;display:flex;flex-direction:column;gap:12px;min-height:150px;}
.std .std-top{display:flex;align-items:center;justify-content:space-between;}
.std .std-icon{width:26px;height:26px;color:var(--navy);}
.std .std-status{font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;padding:3px 7px;border-radius:2px;border:1px solid var(--line-2);color:var(--muted);}
.std .std-status.ok{color:var(--verify);border-color:rgba(30,110,79,.4);}
.std .std-name{font-family:var(--display);font-weight:700;font-size:16px;letter-spacing:-.01em;margin-top:auto;}
.std .std-desc{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.02em;}

/* ============================================================
   EVIDENCE / AUDIT TABLE
   ============================================================ */
.atable{width:100%;border-collapse:collapse;margin-top:42px;font-size:14px;}
.atable th{font-family:var(--mono);font-weight:500;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);text-align:left;padding:0 18px 14px;border-bottom:1px solid var(--ink);}
.atable td{padding:16px 18px;border-bottom:1px solid var(--line);vertical-align:middle;}
.atable tr:hover td{background:rgba(18,19,23,.025);}
.atable .a-time{font-family:var(--mono);font-size:12px;color:var(--muted);white-space:nowrap;}
.atable .a-event{font-weight:600;}
.atable .a-hash{font-family:var(--mono);font-size:12px;color:var(--faint);}
.atable .a-verdict{font-family:var(--mono);font-size:11px;letter-spacing:.06em;display:inline-flex;align-items:center;gap:7px;}
.atable .a-verdict.pass{color:var(--verify);}
.atable .a-verdict.block{color:var(--seal);}
.atable .a-verdict i{width:6px;height:6px;border-radius:50%;background:currentColor;}

/* ============================================================
   GENERATIVE TOPOGRAPHIC MESH
   ============================================================ */
.mesh-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;pointer-events:none;z-index:0;}

/* hero: navy ink mesh fanning from the right, masked to fade */
.hero{position:relative;overflow:hidden;}
.hero-mesh{position:absolute;top:-6%;right:-6%;width:74%;height:118%;z-index:0;
  -webkit-mask-image:radial-gradient(120% 90% at 88% 38%,#000 12%,transparent 68%);
          mask-image:radial-gradient(120% 90% at 88% 38%,#000 12%,transparent 68%);}
.hero .wrap{position:relative;z-index:1;}

/* dark section mesh — flows across the top band of the section */
.sec-mesh{position:absolute;top:0;left:0;right:0;height:62%;z-index:0;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,#000 38%,transparent 92%);
          mask-image:linear-gradient(180deg,#000 0%,#000 38%,transparent 92%);}
.dark .wrap{position:relative;z-index:1;}

/* ============================================================
   CTA BAND
   ============================================================ */
.cta-band{text-align:center;padding:clamp(80px,13vh,150px) 0;}
.cta-band h2{margin:0 auto;max-width:18ch;}
.cta-band .lede{margin:22px auto 0;text-align:center;}
.cta-band .cta-row{display:flex;gap:14px;justify-content:center;margin-top:36px;flex-wrap:wrap;}

/* gradient navy→indigo CTA with a mesh manifold behind it */
.cta-band.gradient{position:relative;overflow:hidden;color:var(--paper-on-dark);
  background:
    radial-gradient(130% 120% at 50% -10%, #21407a 0%, #16294d 42%, #0E1530 78%, #0B1022 100%);
  border-top:1px solid var(--dark-line);border-bottom:1px solid var(--dark-line);}
.cta-band.gradient::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(100% 100% at 50% 0%,#000 10%,transparent 70%);
          mask-image:radial-gradient(100% 100% at 50% 0%,#000 10%,transparent 70%);}
.cta-band.gradient h2{color:#fff;}
.cta-band.gradient .lede{color:#C3CEE6;}
.cta-band.gradient .label{color:#A9BBDD;}
.cta-band.gradient .label .tick{border-color:#7E9ED8;background:#7E9ED8;}
.cta-band.gradient .btn-primary{background:var(--paper);color:var(--ink);}
.cta-band.gradient .btn-primary:hover{background:#fff;}
.cta-band.gradient .btn-ghost{border-color:rgba(255,255,255,.28);color:#fff;}
.cta-band.gradient .btn-ghost:hover{border-color:rgba(255,255,255,.55);background:rgba(255,255,255,.06);}
.cta-band .cta-mesh{position:absolute;inset:0;z-index:0;
  -webkit-mask-image:radial-gradient(120% 95% at 50% 22%,#000 8%,transparent 72%);
          mask-image:radial-gradient(120% 95% at 50% 22%,#000 8%,transparent 72%);}
.cta-band .wrap{position:relative;z-index:1;}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{background:var(--dark);color:var(--muted-on-dark);padding:72px 0 36px;border-top:1px solid var(--dark-line);}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;}
.footer .brand{color:#fff;margin-bottom:18px;font-size:38px;gap:18px;}
.footer .brand .mark-img{height:60px;}
.footer .brand .mark{color:#fff;}
.footer .brand b{color:#6E97D6;}
.footer .f-about{font-size:14px;color:var(--muted-on-dark);max-width:34ch;line-height:1.6;}
.footer h5{font-family:var(--mono);font-weight:500;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint-on-dark);margin:0 0 16px;}
.footer ul{list-style:none;margin:0;padding:0;display:grid;gap:11px;}
.footer ul a{font-size:14px;color:var(--muted-on-dark);transition:color .2s;}
.footer ul a:hover{color:#fff;}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;margin-top:56px;padding-top:26px;border-top:1px solid var(--dark-line);}
.footer-bottom .fb-l{font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;color:var(--faint-on-dark);}
.footer-bottom .fb-r{display:flex;gap:22px;}
.footer-bottom .fb-r a{font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;color:var(--faint-on-dark);}
.footer-bottom .fb-r a:hover{color:#fff;}

/* ============================================================
   REVEAL
   ============================================================ */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .8s var(--ease),transform .8s var(--ease);}
.reveal.in{opacity:1;transform:none;}
.reveal.d1{transition-delay:.07s;}
.reveal.d2{transition-delay:.14s;}
.reveal.d3{transition-delay:.21s;}
.reveal.d4{transition-delay:.28s;}
.reveal.d5{transition-delay:.35s;}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1!important;transform:none!important;}}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1080px){
  .cards.c-3{grid-template-columns:repeat(2,1fr);}
  .pipeline-stages{grid-template-columns:repeat(3,1fr);}
  .pstage:nth-child(3n){border-right:0;}
  .pstage:nth-child(-n+3){border-bottom:1px solid var(--line);}
  .standards{grid-template-columns:repeat(2,1fr);}
  .stats{grid-template-columns:repeat(2,1fr);}
  .footer-top{grid-template-columns:1fr 1fr;}
}
@media (max-width:960px){
  .nav-links{display:none;}
  .nav-status{display:none;}
  .nav-right .btn-ghost{display:none;}
  .burger{display:inline-flex;}
  .nav-inner{height:72px;}
  .brand-logo{height:50px;}
  .mobile-menu{top:72px;}
}
@media (max-width:820px){
  .hero-grid{grid-template-columns:1fr;align-items:stretch;}
  .sec-head{grid-template-columns:1fr;gap:16px;}
  .sec-head .sh-no{padding-top:0;}
  .cards.c-3,.cards.c-2{grid-template-columns:1fr;}
  .compare{grid-template-columns:1fr;}
  .pipeline-stages{grid-template-columns:repeat(2,1fr);}
  .pstage:nth-child(3n){border-right:1px solid var(--line);}
  .pstage:nth-child(2n){border-right:0;}
  .pstage:nth-child(-n+4){border-bottom:1px solid var(--line);}
  .ledger-row{grid-template-columns:40px 1fr;gap:14px 18px;}
  .ledger-row .lr-desc{grid-column:2;}
  .ledger-row .lr-tag{grid-column:2;}
  .atable .a-hash{display:none;}
  .footer-top{grid-template-columns:1fr 1fr;}
}
@media (max-width:560px){
  :root{--gutter:20px;}
  .nav-inner{height:72px;gap:10px;}
  .brand{min-width:0;flex:1;}
  .brand-logo{height:42px;max-width:min(210px,52vw);object-fit:contain;}
  .nav-right{display:none;}
  .burger{width:42px;height:42px;flex:none;}
  .mobile-menu{top:72px;}
  .hero{padding-top:46px;padding-bottom:56px;overflow:hidden;}
  .hero-grid,.hero-copy{min-width:0;width:100%;}
  .hero-visual{display:none;}
  .label{font-size:10px;letter-spacing:.16em;line-height:1.35;max-width:100%;flex-wrap:wrap;}
  .h-xl{font-size:clamp(40px,12vw,52px);line-height:1.02;letter-spacing:-.02em;}
  .hero h1{margin-top:20px;max-width:100%;overflow-wrap:normal;}
  .lede{font-size:19px;line-height:1.55;max-width:100%;overflow-wrap:break-word;}
  .hero-cta{display:grid;grid-template-columns:1fr;gap:12px;width:100%;margin-top:30px;}
  .hero-cta .btn{width:100%;justify-content:center;min-height:58px;padding-left:18px;padding-right:18px;text-align:center;}
  .hero-meta{display:grid;grid-template-columns:1fr;margin-top:34px;}
  .hero-meta .m{margin:0;padding:18px 0;border-right:0;border-bottom:1px solid var(--line);}
  .hero-meta .m:last-child{border-bottom:0;}
  .standards{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr;}
  .footer-top{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* ============================================================
   BOUNDARY / SPLIT DIAGRAM (worker vs control plane)
   ============================================================ */
.boundary{position:relative;background:var(--paper);border:1px solid var(--line-2);border-radius:5px;
  box-shadow:0 1px 0 rgba(255,255,255,.6) inset,0 30px 60px -42px rgba(18,19,23,.5);overflow:hidden;}
.bd-zone{padding:17px 18px 19px;}
.bd-zone.plane{background:var(--paper-2);}
.bd-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:13px;}
.bd-k{font-family:var(--mono);font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-2);display:inline-flex;align-items:center;gap:9px;font-weight:500;}
.bd-k .bx{width:8px;height:8px;border:1.5px solid var(--navy);flex:none;transform:rotate(45deg);}
.bd-zone.plane .bd-k .bx{border-color:var(--muted);background:var(--muted);}
.bd-status{font-family:var(--mono);font-size:9.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--verify);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.bd-status .d{width:6px;height:6px;border-radius:50%;background:var(--verify);}
.bd-status.neutral{color:var(--faint);}
.bd-status.neutral .d{background:var(--faint);}
.bd-list{display:flex;flex-direction:column;}
.bd-row{display:flex;align-items:center;gap:10px;padding:7px 0;border-top:1px solid var(--line-soft);font-size:13px;color:var(--ink-2);}
.bd-row:first-child{border-top:0;}
.bd-row svg{width:14px;height:14px;flex:none;}
.bd-row .lk{color:var(--seal);}
.bd-row .em{color:var(--verify);}
.bd-row .h{font-family:var(--mono);font-size:11px;color:var(--faint);margin-left:auto;white-space:nowrap;}
.bd-cross{display:flex;align-items:center;gap:12px;padding:11px 18px;background:var(--ink);color:var(--paper);}
.bd-cross .bc-l{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:#C3CEE6;display:inline-flex;align-items:center;gap:10px;}
.bd-cross svg{width:15px;height:15px;color:#7E9ED8;flex:none;}
.bd-cross .bc-r{margin-left:auto;font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:var(--faint-on-dark);white-space:nowrap;}

/* architecture section layout */
.arch-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(34px,5vw,68px);align-items:center;margin-top:50px;}
.arch-points{display:flex;flex-direction:column;gap:26px;}
.arch-point{display:grid;grid-template-columns:auto 1fr;gap:18px;}
.arch-point .ap-n{font-family:var(--mono);font-size:12px;color:var(--navy);letter-spacing:.1em;padding-top:4px;white-space:nowrap;}
.arch-point h4{font-size:19px;letter-spacing:-.016em;margin:0 0 6px;}
.arch-point p{color:var(--muted);font-size:14.5px;line-height:1.55;}
.dark .arch-point .ap-n{color:#6E97D6;}
.dark .arch-point p{color:var(--muted-on-dark);}
.dark .boundary{box-shadow:0 30px 60px -42px rgba(0,0,0,.7);}

/* ============================================================
   INSPECTABLE ENVELOPE TERMINAL
   ============================================================ */
.term{background:#0D0F13;border:1px solid var(--dark-line);border-radius:6px;overflow:hidden;box-shadow:0 34px 64px -44px rgba(0,0,0,.6);}
.term-head{display:flex;align-items:center;gap:11px;padding:11px 15px;border-bottom:1px solid var(--dark-line-soft);background:#15181E;}
.term-head .tdots{display:flex;gap:6px;}
.term-head .tdots i{width:10px;height:10px;border-radius:50%;background:#2A2E36;display:block;}
.term-head .tt{font-family:var(--mono);font-size:11px;letter-spacing:.04em;color:var(--muted-on-dark);}
.term-head .tt b{color:#C3CEE6;font-weight:500;}
.term-body{padding:17px 19px;font-family:var(--mono);font-size:12.5px;line-height:1.55;color:#C7CAD2;}
.term-line{display:flex;gap:10px;align-items:baseline;padding:2.5px 0;}
.term-line .ic{flex:none;width:14px;}
.term-cmd{color:#fff;margin-bottom:8px;}
.term-cmd .pfx{color:#5C84C4;}
.term-grp{display:block;margin:14px 0 6px;color:var(--faint-on-dark);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;}
.term-grp:first-child{margin-top:0;}
.term .yes{color:#7FC79B;}
.term .up{color:#E7C284;}

/* ============================================================
   CODE CUSTODY MODE — static selector (marketing)
   ============================================================ */
.cmodes{display:flex;flex-direction:column;gap:1px;background:var(--line);border:1px solid var(--line);margin-top:8px;}
.cmode{display:grid;grid-template-columns:auto 1fr auto;gap:15px;align-items:center;padding:18px 22px;background:var(--paper);}
.cmode.sel{background:var(--paper-2);}
.cmode .cm-radio{width:18px;height:18px;border-radius:50%;border:1.5px solid var(--line-2);position:relative;flex:none;}
.cmode.sel .cm-radio{border-color:var(--navy);}
.cmode.sel .cm-radio::after{content:"";position:absolute;inset:3px;border-radius:50%;background:var(--navy);}
.cmode .cm-name{font-family:var(--display);font-weight:700;font-size:16px;letter-spacing:-.01em;}
.cmode .cm-desc{font-size:13.5px;color:var(--muted);margin-top:3px;line-height:1.5;}
.cmode .cm-tag{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--navy);white-space:nowrap;}
.cmode .cm-tag.seal{color:var(--seal);}

/* ============================================================
   PRODUCT LADDER / PRICING TIERS
   ============================================================ */
.tiers{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:48px;}
.tier{background:var(--paper);padding:28px 24px 30px;display:flex;flex-direction:column;position:relative;}
.tier.hot{background:var(--dark);color:var(--paper-on-dark);}
.tier .tr-k{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);}
.tier.hot .tr-k{color:#7E9ED8;}
.tier .tr-name{font-family:var(--display);font-weight:800;font-size:19px;letter-spacing:-.02em;margin:12px 0 6px;}
.tier.hot .tr-name{color:#fff;}
.tier .tr-price{font-size:12.5px;color:var(--muted);min-height:18px;font-weight:500;}
.tier.hot .tr-price{color:var(--muted-on-dark);}
.tier ul{list-style:none;margin:18px 0 0;padding:18px 0 0;border-top:1px solid var(--line);display:grid;gap:11px;}
.tier.hot ul{border-top-color:var(--dark-line);}
.tier li{font-size:13px;color:var(--ink-2);display:flex;gap:9px;align-items:flex-start;line-height:1.42;}
.tier.hot li{color:var(--paper-on-dark);}
.tier li svg{width:14px;height:14px;flex:none;margin-top:2px;color:var(--navy);}
.tier.hot li svg{color:#5C9B79;}

@media (max-width:1080px){.tiers{grid-template-columns:repeat(2,1fr);}}
@media (max-width:820px){
  .arch-grid{grid-template-columns:1fr;gap:34px;}
}
@media (max-width:560px){
  .tiers{grid-template-columns:1fr;}
  .cmode{grid-template-columns:auto 1fr;}
  .cmode .cm-tag{grid-column:2;}
}