/* Lattice Ledger Labs — styles.css
   Design system: Deep Navy / Cobalt / Slate, Verify-Emerald for affirmative
   states only. Self-hosted Poppins. Generated pages consume these tokens. */

/* ---- Fonts (self-hosted, no third-party hot-link) ---- */
@font-face{font-family:Poppins;font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/poppins-400.woff2) format("woff2")}
@font-face{font-family:Poppins;font-style:normal;font-weight:500;font-display:swap;src:url(/fonts/poppins-500.woff2) format("woff2")}
@font-face{font-family:Poppins;font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/poppins-600.woff2) format("woff2")}
@font-face{font-family:Poppins;font-style:normal;font-weight:700;font-display:swap;src:url(/fonts/poppins-700.woff2) format("woff2")}

/* ---- Tokens ---- */
:root{
  --navy:#0A1628;        /* deep navy — dark sections */
  --navy-2:#0F2036;      /* raised navy panel */
  --ink:#0F1B2D;         /* primary text on light */
  --slate:#4A5A70;       /* secondary text */
  --slate-2:#6B7A8F;     /* muted */
  --cobalt:#1F5AE0;      /* primary accent / links */
  --cobalt-deep:#173F9E; /* pressed */
  --emerald:#12B886;     /* Verify-Emerald — affirmative ONLY */
  --paper:#FFFFFF;
  --mist:#F4F6FA;        /* alt light section */
  --mist-2:#EAEEF6;      /* borders on light */
  --line:#DCE3EF;
  --line-dark:rgba(255,255,255,.14);
  --radius:12px;
  --radius-sm:8px;
  --wrap:1120px;
  --shadow:0 1px 2px rgba(15,27,45,.06),0 12px 32px -12px rgba(15,27,45,.18);
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---- Reset ---- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:Poppins,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--ink);background:var(--paper);line-height:1.62;font-weight:400;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--cobalt);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.14;letter-spacing:-.02em;font-weight:600;margin:0}
p{margin:0}
:focus-visible{outline:3px solid var(--cobalt);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-9999px;top:0;background:var(--navy);color:#fff;padding:.7rem 1rem;z-index:100;border-radius:0 0 8px 0}
.skip:focus{left:0}

/* ---- Layout ---- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(20px,5vw,40px)}
section{padding-block:clamp(56px,8vw,104px)}
.eyebrow{font-size:.78rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--cobalt);margin:0 0 1rem}
.dark .eyebrow{color:#7FA6FF}
.lead{font-size:clamp(1.02rem,1.6vw,1.22rem);color:var(--slate);max-width:64ch;margin-top:.4rem}
.lead.light{color:#B9C6DA}
.fine{font-size:.85rem;color:var(--slate-2);margin-top:1.4rem}
.accent{color:var(--cobalt)}

/* ---- Header ---- */
.site-head{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line)}
.head-inner{display:flex;align-items:center;justify-content:space-between;min-height:66px}
.brand{display:inline-flex;align-items:center;gap:.6rem;color:var(--ink);font-weight:600;
  letter-spacing:-.01em}
.brand:hover{text-decoration:none}
.brand-name{font-size:1.06rem}
.wordmark{color:var(--navy);flex:none}
.nav-menu{list-style:none;display:flex;align-items:center;gap:.35rem;margin:0;padding:0}
.nav-menu a{color:var(--ink);font-weight:500;font-size:.95rem;padding:.5rem .8rem;border-radius:8px}
.nav-menu a:hover{background:var(--mist);text-decoration:none;color:var(--cobalt)}
.nav-cta{background:var(--navy);color:#fff!important;padding:.55rem 1.05rem!important}
.nav-cta:hover{background:var(--cobalt)!important;color:#fff!important}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:42px;height:42px;
  align-items:center;justify-content:center;background:none;border:1px solid var(--line);
  border-radius:8px;cursor:pointer}
.nav-toggle span{width:20px;height:2px;background:var(--ink);transition:.25s var(--ease)}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  font-family:inherit;font-weight:600;font-size:.98rem;padding:.82rem 1.5rem;border-radius:var(--radius-sm);
  border:1.5px solid transparent;cursor:pointer;transition:.2s var(--ease);white-space:nowrap}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--cobalt);color:#fff;box-shadow:0 8px 20px -8px rgba(31,90,224,.6)}
.btn-primary:hover{background:var(--cobalt-deep)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--cobalt);color:var(--cobalt)}
.dark .btn-ghost{color:#EAF0FB;border-color:var(--line-dark)}
.dark .btn-ghost:hover{border-color:#7FA6FF;color:#fff}

/* ---- Hero ---- */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden;
  padding-block:clamp(72px,12vw,136px)}
.hero-inner{position:relative;z-index:2;max-width:860px}
.hero-title{font-size:clamp(2.3rem,6.4vw,4.1rem);font-weight:700;letter-spacing:-.03em;
  margin-bottom:1.4rem}
.hero-title .accent{color:var(--emerald)}
.hero-sub{font-size:clamp(1.05rem,1.9vw,1.32rem);color:#C4D0E4;max-width:58ch;font-weight:400}
.hero-actions{display:flex;flex-wrap:wrap;gap:.9rem;margin:2.2rem 0 1.4rem}
.hero-meta{font-size:.85rem;color:#8FA1BE;letter-spacing:.02em}
.hero-grid{position:absolute;inset:0;z-index:1;opacity:.5;
  background:
    radial-gradient(1000px 460px at 82% -8%,rgba(31,90,224,.42),transparent 62%),
    radial-gradient(680px 400px at 8% 108%,rgba(18,184,134,.14),transparent 60%),
    linear-gradient(transparent 95%,rgba(255,255,255,.05) 95%) 0 0/100% 34px,
    linear-gradient(90deg,transparent 95%,rgba(255,255,255,.05) 95%) 0 0/34px 100%}

/* ---- Bands ---- */
.band{background:var(--paper)}
.band:nth-of-type(even){background:var(--mist)}
.band-title{font-size:clamp(1.6rem,3.4vw,2.35rem);max-width:22ch;margin-bottom:.9rem}
.band-title.light{color:#fff}
.dark{background:var(--navy);color:#fff}
.dark .band-title{color:#fff}

/* ---- Pillars ---- */
.pillars{background:var(--paper)}
.pillar-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.pillar{padding:1.9rem;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper);
  transition:.25s var(--ease)}
.pillar:hover{border-color:var(--cobalt);box-shadow:var(--shadow);transform:translateY(-3px)}
.pillar h3{font-size:1.28rem;margin-bottom:.6rem;color:var(--navy)}
.pillar h3::before{content:"";display:block;width:34px;height:3px;background:var(--emerald);
  border-radius:2px;margin-bottom:1rem}
.pillar p{color:var(--slate)}

/* ---- Chip row ---- */
.chip-row{list-style:none;display:flex;flex-wrap:wrap;gap:.7rem;padding:0;margin:1.8rem 0 0}
.chip-row li{background:var(--paper);border:1px solid var(--line);border-radius:999px;
  padding:.5rem 1.05rem;font-size:.9rem;font-weight:500;color:var(--ink)}
.band:nth-of-type(even) .chip-row li{background:#fff}

/* ---- Read-only diagram ---- */
.ro-figure{margin:2.6rem 0 0}
.ro-svg{width:100%;max-width:760px;margin-inline:auto}
.ro-node rect{fill:rgba(255,255,255,.05);stroke:var(--line-dark);stroke-width:1.5}
.ro-node text{fill:#EAF0FB;font-size:13px;font-weight:500;text-anchor:middle;font-family:Poppins,sans-serif}
.ro-node text.sub{fill:#8FA1BE;font-size:11px;font-weight:400}
.ro-engine rect{fill:rgba(31,90,224,.16);stroke:var(--cobalt);stroke-width:1.8}
.ro-engine text{fill:#fff;font-size:15px;font-weight:600;text-anchor:middle;font-family:Poppins,sans-serif}
.ro-engine text.sub{fill:#B9C6DA;font-size:11.5px;font-weight:400}
.ro-flow{stroke:var(--cobalt);stroke-width:2;fill:none}
.ro-label{fill:#8FA1BE;font-size:11px;text-anchor:middle;letter-spacing:.08em;text-transform:uppercase;font-family:Poppins,sans-serif}
.ro-boundary{stroke:var(--emerald);stroke-width:2;stroke-dasharray:5 5;opacity:.85}
.ro-boundary-label{fill:var(--emerald);font-size:10.5px;font-weight:600;letter-spacing:.14em;font-family:Poppins,sans-serif}
.ro-out rect{fill:rgba(18,184,134,.1);stroke:var(--emerald);stroke-width:1.5}
.ro-blocked{stroke:#C9455B;stroke-width:2;fill:none;stroke-dasharray:4 4;opacity:.6}
.ro-nowrite circle{fill:none;stroke:#C9455B;stroke-width:2}
.ro-nowrite line{stroke:#C9455B;stroke-width:2}
.ro-label-red{fill:#E0778A}
.ro-figure figcaption{color:#8FA1BE;font-size:.86rem;text-align:center;max-width:52ch;
  margin:1.2rem auto 0}
.band .ro-figure figcaption{color:var(--slate)}

/* ---- CTA ---- */
.cta{background:var(--navy);color:#fff}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:2rem}
.cta-inner h2{font-size:clamp(1.4rem,3vw,2rem);max-width:24ch;color:#fff}
.cta-inline{display:flex;flex-wrap:wrap;gap:.9rem;margin-top:2rem}

/* ---- Page hero (interior) ---- */
.page-hero{background:var(--navy);color:#fff;padding-block:clamp(64px,10vw,120px)}
.page-hero h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:700;margin-bottom:1.1rem;max-width:18ch}
.page-hero .lead{color:#C4D0E4}
.page-hero.notfound{min-height:56vh;display:flex;align-items:center}

/* ---- Feature list ---- */
.feature-list{display:grid;gap:2.2rem;max-width:820px}
.feature{padding-left:1.6rem;border-left:3px solid var(--emerald)}
.feature h2{font-size:1.5rem;color:var(--navy);margin-bottom:.6rem}
.feature p{color:var(--slate)}

/* ---- Tiles ---- */
.tile-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.3rem}
.tile{padding:1.7rem;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper)}
.tile h2{font-size:1.16rem;color:var(--navy);margin-bottom:.55rem}
.tile h2::before{content:"";display:inline-block;width:9px;height:9px;border-radius:2px;
  background:var(--emerald);margin-right:.55rem;vertical-align:middle}
.tile p{color:var(--slate);font-size:.96rem}

/* ---- Prose ---- */
.prose{max-width:720px}
.prose h2{font-size:1.4rem;color:var(--navy);margin:2.4rem 0 .8rem}
.prose h2:first-child{margin-top:0}
.prose p{color:var(--slate);margin-bottom:1rem}
.prose ul{color:var(--slate);padding-left:1.2rem;margin:0 0 1rem}
.prose li{margin-bottom:.5rem}
.prose code{background:var(--mist-2);padding:.12em .4em;border-radius:5px;font-size:.9em}
.prose-addr,.contact-addr,.foot-addr{font-style:normal;line-height:1.7}
.prose-addr{color:var(--slate);margin:1rem 0 0}

/* ---- Contact ---- */
.contact-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:3rem;align-items:start}
.contact-form .field{margin-bottom:1.15rem}
.contact-form label{display:block;font-weight:500;font-size:.92rem;margin-bottom:.4rem;color:var(--ink)}
.contact-form input,.contact-form textarea{width:100%;font-family:inherit;font-size:1rem;
  padding:.75rem .9rem;border:1.5px solid var(--line);border-radius:var(--radius-sm);
  background:var(--paper);color:var(--ink);transition:.18s var(--ease)}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--cobalt);
  box-shadow:0 0 0 3px rgba(31,90,224,.14)}
.contact-form textarea{resize:vertical}
.form-note{font-size:.85rem;color:var(--slate-2);margin-top:1rem}
.form-note.ok{color:var(--emerald)}
.form-note.err{color:#C9455B}
.contact-aside h2{font-size:1.1rem;color:var(--navy);margin:0 0 .8rem}
.contact-aside h2:nth-of-type(2){margin-top:2rem}
.contact-dl{display:grid;grid-template-columns:auto 1fr;gap:.4rem 1rem;margin:0}
.contact-dl dt{font-weight:500;color:var(--slate)}
.contact-dl dd{margin:0}
.contact-addr{color:var(--slate)}

/* ---- Footer ---- */
.site-foot{background:var(--navy);color:#B9C6DA;padding-top:clamp(48px,7vw,80px)}
.site-foot .wordmark{color:#fff}
.site-foot .brand-name{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.5fr 2fr;gap:2.6rem;padding-bottom:2.4rem}
.foot-tag{margin:1rem 0;max-width:34ch;font-size:.94rem}
.foot-addr{font-size:.9rem;color:#8FA1BE}
.foot-addr a{color:#B9C6DA}
.foot-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem}
.fcol h4{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:#7C8CA6;
  margin:0 0 .9rem;font-weight:600}
.fcol ul{list-style:none;margin:0;padding:0}
.fcol li{margin-bottom:.55rem}
.fcol a{color:#B9C6DA;font-size:.94rem}
.fcol a:hover{color:#fff}
.foot-base{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.6rem;
  padding:1.6rem 0;border-top:1px solid var(--line-dark);font-size:.84rem;color:#7C8CA6}
.foot-note{color:#63728C}

/* ---- Responsive ---- */
@media(max-width:820px){
  .pillar-grid,.tile-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr;gap:2rem}
  .foot-grid{grid-template-columns:1fr;gap:2rem}
  .foot-cols{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:680px){
  .nav-toggle{display:flex}
  .nav-menu{position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:#fff;border-bottom:1px solid var(--line);padding:.8rem clamp(20px,5vw,40px) 1.2rem;
    gap:.2rem;box-shadow:var(--shadow);
    transform:translateY(-8px);opacity:0;pointer-events:none;transition:.2s var(--ease)}
  .nav-menu.open{transform:none;opacity:1;pointer-events:auto}
  .nav-menu a{padding:.75rem .6rem}
  .nav-cta{text-align:center;margin-top:.4rem}
  .foot-cols{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start}
}

/* ---- Reduced motion ---- */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;
    scroll-behavior:auto!important}
  .btn:hover,.pillar:hover{transform:none}
}