/* ============================================================
   GuardTalk.io — design system
   Dark protective register. Tokens per Brand Book §4 / Web Brief §4.
   Self-hosted only. No third-party origins. No webfont CDN.
   Brand fonts (Space Grotesk / Inter / JetBrains Mono) degrade to a
   system stack until the .woff2 files are dropped into /assets/fonts.
   ============================================================ */

:root{
  /* Grounds & structure */
  --obsidian:#0A0B0C;   /* primary ground */
  --black:#000000;      /* full-bleed hero */
  --carbon:#121417;     /* raised surfaces, cards */
  --graphite:#1C2026;   /* secondary surfaces */
  --steel:#363C45;      /* structure, borders */
  --steel-line:#23272E; /* hairlines */

  /* THE accent */
  --signal:#C3FF61;
  --signal-deep:#A6E83C;
  --signal-ink:#4C6B12;

  /* Functional status semantics — reserved, never decorative */
  --tripwire:#FF5247;   /* a threat: detected / blocked */
  --caution:#FFB020;    /* attention: degraded / pending */
  --anon:#5BC8FF;       /* Tor-routed / anonymised / info */

  /* Text on dark */
  --paper:#F6F7F5;      /* primary text */
  --fog:#A7AEB8;        /* secondary text */
  --mist:#D8DDE3;       /* tertiary text */

  --display:'Space Grotesk','Inter',system-ui,-apple-system,Segoe UI,sans-serif;
  --text:'Inter',system-ui,-apple-system,Segoe UI,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,'SF Mono',Menlo,Consolas,monospace;

  --container:1200px;
  --radius:8px;
  --ease:cubic-bezier(0.22,0.8,0.2,1);
}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  background:var(--obsidian);
  color:var(--paper);
  font-family:var(--text);
  font-weight:400;
  line-height:1.65;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:3px;}
::selection{background:rgba(195,255,97,.25);color:#fff;}

/* ---------- Layout primitives ---------- */
.wrap{max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--tight{padding:64px 0;}
.section--alt{background:var(--carbon);}
.divider{height:1px;background:var(--steel-line);border:0;}
.eyebrow{
  font-family:var(--mono);font-size:11px;letter-spacing:.26em;
  text-transform:uppercase;color:var(--signal-ink);margin-bottom:18px;
  display:flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--signal);}
.sig-rule{height:3px;width:56px;background:var(--signal);border-radius:2px;margin:0 0 28px;}

/* ---------- Type ---------- */
h1,h2,h3{font-family:var(--display);font-weight:600;letter-spacing:-.025em;color:var(--paper);line-height:1.06;}
h1{font-size:clamp(20px,2.2vw,32px);margin-bottom:24px;}
h2{font-size:clamp(28px,4vw,40px);margin-bottom:20px;letter-spacing:-.02em;}
h3{font-size:22px;margin-bottom:12px;letter-spacing:-.01em;}
.lead{font-family:var(--display);font-weight:500;font-size:clamp(19px,2.4vw,26px);line-height:1.4;color:var(--mist);letter-spacing:-.01em;max-width:40ch;}
p{max-width:64ch;margin-bottom:16px;color:var(--fog);}
p strong,strong{color:var(--paper);font-weight:600;}
.muted{color:var(--fog);}
.micro{font-size:13.5px;line-height:1.6;color:var(--fog);}

/* The technical layer — every verifiable fact is mono */
.mono{font-family:var(--mono);}
code,.code{font-family:var(--mono);font-size:.92em;color:var(--mist);}
.kbd-label{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--fog);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--text);font-weight:600;font-size:15px;
  padding:13px 22px;border-radius:6px;min-height:44px;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn--primary{background:var(--signal);color:#16210a;border-color:var(--signal-deep);}
.btn--primary:hover{background:var(--signal-deep);}
.btn--outline{background:transparent;color:var(--paper);border-color:var(--steel);}
.btn--outline:hover{border-color:var(--signal);color:var(--signal);}
.btn--ghost{background:transparent;color:var(--signal);padding-left:0;padding-right:0;}
.btn--ghost:hover{color:var(--signal-deep);}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:8px;}

/* arrow link */
.alink{color:var(--signal);font-weight:600;display:inline-flex;align-items:center;gap:7px;}
.alink:hover{color:var(--signal-deep);}
.alink::after{content:"→";transition:transform .18s var(--ease);}
.alink:hover::after{transform:translateX(3px);}
.alink--ext::after{content:"↗";}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(10,11,12,.72);
  backdrop-filter:saturate(140%) blur(12px);
  border-bottom:1px solid var(--steel-line);
}
.site-header .wrap{display:flex;align-items:center;gap:24px;min-height:64px;}
.brandmark{display:inline-flex;align-items:center;color:var(--signal);flex:none;}
.brandmark svg{display:block;}
.mainnav{display:flex;gap:18px;margin-left:8px;}
.mainnav a{font-size:14.5px;color:var(--fog);font-weight:500;white-space:nowrap;transition:color .18s var(--ease);}
.mainnav a:hover,.mainnav a[aria-current="page"]{color:var(--paper);}
.header-cta{margin-left:auto;display:flex;align-items:center;gap:14px;}

/* posture pill */
.posture-pill{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--mono);font-size:11px;letter-spacing:.04em;
  color:var(--fog);border:1px solid var(--steel-line);
  background:var(--carbon);border-radius:20px;padding:6px 13px;
  white-space:nowrap;
}
.posture-pill .dot{width:7px;height:7px;border-radius:50%;background:var(--signal-deep);flex:none;}
.onion-link{font-family:var(--mono);font-size:11px;color:var(--anon);letter-spacing:.02em;}
.onion-link:hover{text-decoration:underline;}

.menu-toggle{display:none;}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--black);border-bottom:1px solid var(--steel-line);}
.hero-grid,.hud-grid{
  position:absolute;inset:0;
  background-image:linear-gradient(var(--steel-line) 1px,transparent 1px),linear-gradient(90deg,var(--steel-line) 1px,transparent 1px);
  background-size:58px 58px;opacity:.5;
  -webkit-mask-image:radial-gradient(circle at 50% 38%,#000,transparent 76%);
          mask-image:radial-gradient(circle at 50% 38%,#000,transparent 76%);
}
.hero-glow{
  position:absolute;width:900px;height:900px;left:50%;top:34%;
  transform:translate(-50%,-50%);pointer-events:none;
  background:radial-gradient(circle,rgba(195,255,97,.13),transparent 60%);
}
.hero .wrap{position:relative;z-index:1;padding-top:96px;padding-bottom:96px;}
.hero-inner{max-width:760px;}
.hero h1{margin-bottom:20px;}
.hero .lead{max-width:54ch;color:var(--mist);}

/* posture strip */
.posture-strip{display:flex;flex-wrap:wrap;gap:8px;margin:26px 0 30px;}
.chip{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;
  color:var(--mist);border:1px solid var(--steel-line);background:rgba(18,20,23,.6);
  border-radius:4px;padding:6px 11px;display:inline-flex;align-items:center;gap:7px;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
a.chip:hover{border-color:var(--signal);color:var(--signal);}
.chip .dot{width:6px;height:6px;border-radius:50%;background:var(--signal-deep);}

.tagline{font-family:var(--mono);font-size:12px;letter-spacing:.32em;text-transform:uppercase;color:var(--signal);margin-top:34px;}

/* ---------- Cards & grids ---------- */
.grid{display:grid;gap:22px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
.card{
  background:var(--carbon);border:1px solid var(--steel-line);
  border-radius:var(--radius);padding:28px;
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.card--link:hover{border-color:var(--steel);transform:translateY(-2px);}
.card h3{margin-bottom:10px;}
.card p{font-size:15px;margin-bottom:0;}
.card .icon{width:40px;height:40px;border-radius:9px;display:flex;align-items:center;justify-content:center;background:rgba(195,255,97,.1);color:var(--signal);margin-bottom:18px;border:1px solid rgba(166,232,60,.25);}
.card .icon svg{width:22px;height:22px;}
.card .tag{margin-bottom:16px;}

/* tags / labels */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;
  padding:4px 9px;border:1px solid var(--steel-line);border-radius:3px;color:var(--fog);
}
.tag--alpha{color:var(--caution);border-color:rgba(255,176,32,.4);}
.tag--planned{color:var(--anon);border-color:rgba(91,200,255,.4);}
.tag--live{color:var(--signal);border-color:rgba(166,232,60,.4);}

/* status dots (never colour-only — always a label) */
.status{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;letter-spacing:.06em;}
.status .dot{width:8px;height:8px;border-radius:50%;flex:none;}
.status--ok .dot{background:var(--signal-deep);}
.status--threat .dot{background:var(--tripwire);}
.status--caution .dot{background:var(--caution);}
.status--anon .dot{background:var(--anon);}
.status--off .dot{background:var(--fog);}

/* ---------- Mechanism / protection-limit ---------- */
.mech{border:1px solid var(--steel-line);border-radius:var(--radius);overflow:hidden;background:var(--carbon);}
.mech + .mech{margin-top:16px;}
.mech-head{padding:20px 24px;border-bottom:1px solid var(--steel-line);display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;}
.mech-head h3{margin:0;font-size:19px;}
.mech-body{display:grid;grid-template-columns:1fr 1fr;}
.mech-body > div{padding:20px 24px;}
.mech-body > div + div{border-left:1px solid var(--steel-line);}
.mech-label{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;margin-bottom:8px;display:block;}
.mech-protects .mech-label{color:var(--signal-ink);}
.mech-limit .mech-label{color:var(--caution);}
.mech p{font-size:14.5px;margin:0;color:var(--mist);}

/* protection ↔ limit table */
.pl-table{width:100%;border-collapse:collapse;font-size:15px;}
.pl-table th,.pl-table td{text-align:left;padding:16px 18px;vertical-align:top;border-bottom:1px solid var(--steel-line);}
.pl-table thead th{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--fog);font-weight:500;}
.pl-table tbody th{font-family:var(--display);font-weight:600;color:var(--paper);width:24%;}
.pl-table .protects{color:var(--mist);}
.pl-table .limit{color:var(--fog);}
.pl-table .limit::before{content:"limit — ";font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--caution);}

/* spec rows */
.spec{border-top:1px solid var(--steel-line);}
.spec-row{display:flex;justify-content:space-between;gap:24px;padding:13px 0;border-bottom:1px solid var(--steel-line);font-family:var(--mono);font-size:13.5px;}
.spec-row .k{color:var(--fog);}
.spec-row .v{color:var(--paper);text-align:right;}

/* callout */
.callout{border:1px solid var(--steel-line);border-left:3px solid var(--signal);background:var(--carbon);border-radius:var(--radius);padding:22px 24px;}
.callout--anon{border-left-color:var(--anon);}
.callout--caution{border-left-color:var(--caution);}
.callout p:last-child{margin-bottom:0;}

/* out-of-scope list */
.scope-list{list-style:none;display:grid;gap:12px;}
.scope-list li{position:relative;padding-left:28px;color:var(--mist);font-size:15px;max-width:70ch;}
.scope-list li::before{content:"";position:absolute;left:0;top:8px;width:10px;height:10px;border:1.5px solid var(--tripwire);border-radius:2px;transform:rotate(45deg);}
.feature-list{list-style:none;display:grid;gap:12px;}
.feature-list li{position:relative;padding-left:24px;color:var(--mist);font-size:15.5px;max-width:64ch;}
.feature-list li::before{content:"";position:absolute;left:0;top:9px;width:9px;height:9px;background:var(--signal);border:1px solid var(--signal-deep);transform:rotate(45deg);}

/* ---------- Air-gap diagram ---------- */
.diagram{border:1px solid var(--steel-line);border-radius:var(--radius);background:var(--obsidian);padding:32px;position:relative;overflow:hidden;}
.diagram svg{width:100%;height:auto;}
.diagram figcaption{font-family:var(--mono);font-size:12px;color:var(--fog);margin-top:18px;letter-spacing:.02em;}

/* ---------- Steps ---------- */
.steps{counter-reset:step;display:grid;gap:18px;}
.step{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start;border:1px solid var(--steel-line);border-radius:var(--radius);padding:22px 24px;background:var(--carbon);}
.step .num{counter-increment:step;font-family:var(--mono);font-size:13px;color:var(--signal);border:1px solid rgba(166,232,60,.35);border-radius:50%;width:38px;height:38px;display:flex;align-items:center;justify-content:center;flex:none;}
.step .num::before{content:counter(step,decimal-leading-zero);}
.step h3{font-size:18px;margin-bottom:6px;}
.step p{font-size:14.5px;margin:0;}

/* ---------- Pricing / access ---------- */
.price-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.price{background:var(--carbon);border:1px solid var(--steel-line);border-radius:var(--radius);padding:30px;display:flex;flex-direction:column;}
.price--feature{border-color:var(--signal-deep);}
.price .amount{font-family:var(--display);font-weight:600;font-size:40px;color:var(--paper);margin:14px 0 4px;letter-spacing:-.02em;}
.price .amount small{font-size:15px;color:var(--fog);font-weight:400;font-family:var(--text);}
.price .feature-list{margin:18px 0 24px;}
.price .btn{margin-top:auto;justify-content:center;}

/* ---------- Comparison table ---------- */
.cmp{width:100%;border-collapse:collapse;font-size:15px;}
.cmp th,.cmp td{padding:14px 16px;border-bottom:1px solid var(--steel-line);text-align:left;vertical-align:top;}
.cmp thead th{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--fog);font-weight:500;}
.cmp thead th:last-child{color:var(--signal);}
.cmp tbody th{font-weight:600;color:var(--paper);width:22%;}
.cmp .bad{color:var(--fog);}
.cmp .good{color:var(--mist);}
.cmp td:last-child{color:var(--paper);}

/* ---------- CTA banner ---------- */
.cta-banner{position:relative;overflow:hidden;border:1px solid var(--steel-line);border-radius:12px;background:var(--carbon);padding:56px 48px;text-align:center;}
.cta-banner .hud-grid{opacity:.35;}
.cta-banner > *{position:relative;z-index:1;}
.cta-banner h2{margin-bottom:14px;}
.cta-banner .btn-row{justify-content:center;}

/* ---------- Footer ---------- */
.site-footer{background:var(--obsidian);border-top:1px solid var(--steel-line);padding:64px 0 40px;}
.foot-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1fr;gap:32px;margin-bottom:40px;}
.foot-col h4{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--fog);margin-bottom:16px;font-weight:500;}
.foot-col a{display:block;color:var(--mist);font-size:14.5px;margin-bottom:10px;transition:color .18s var(--ease);}
.foot-col a:hover{color:var(--signal);}
.foot-brand .lead{font-size:15px;color:var(--fog);max-width:30ch;margin-top:16px;font-family:var(--text);font-weight:400;}
.foot-posture{display:flex;flex-wrap:wrap;gap:8px;margin:28px 0;}
.foot-meta{border-top:1px solid var(--steel-line);padding-top:24px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;}
.foot-meta p{font-size:13px;color:var(--fog);margin:0;max-width:none;}
.anti-honeypot{color:var(--mist)!important;}

/* ---------- Page header (interior pages) ---------- */
.page-hero{position:relative;overflow:hidden;background:var(--black);border-bottom:1px solid var(--steel-line);}
.page-hero .wrap{position:relative;z-index:1;padding:80px 24px 64px;}
.page-hero h1{max-width:18ch;}
.page-hero .lead{max-width:58ch;margin-top:8px;}

/* prose (legal / docs) */
.prose{max-width:72ch;}
.prose h2{font-size:24px;margin:40px 0 14px;}
.prose h3{font-size:18px;margin:28px 0 10px;}
.prose p,.prose li{color:var(--fog);}
.prose ul{margin:0 0 16px 22px;}
.prose li{margin-bottom:8px;}
.prose a{color:var(--signal);text-decoration:underline;text-underline-offset:3px;}

/* skip link */
.skip{position:absolute;left:-9999px;top:0;background:var(--signal);color:#16210a;padding:10px 16px;border-radius:0 0 6px 0;z-index:100;font-weight:600;}
.skip:focus{left:0;}

/* utilities */
.center{text-align:center;}
.mx-auto{margin-left:auto;margin-right:auto;}
.mt-0{margin-top:0;}
.mb-0{margin-bottom:0!important;}
.stack > * + *{margin-top:16px;}
.lim{max-width:760px;}
.lim-wide{max-width:900px;}

/* ---------- Animation: "the air gap holds" ---------- */
@keyframes probe-travel{
  0%{transform:translateX(0);opacity:0;}
  15%{opacity:1;}
  70%{transform:translateX(var(--travel,120px));opacity:1;}
  72%{opacity:1;}
  100%{transform:translateX(var(--travel,120px));opacity:0;}
}
@keyframes shield-pulse{
  0%,60%{opacity:.35;}
  72%{opacity:1;stroke-width:3;}
  100%{opacity:.85;}
}
@keyframes drop-mark{
  0%,70%{opacity:0;}
  82%{opacity:1;}
  100%{opacity:1;}
}
.diagram .probe{animation:probe-travel 1.9s var(--ease) .4s 1 both;}
.diagram .barrier{animation:shield-pulse 1.9s var(--ease) .4s 1 both;}
.diagram .blocked-mark{animation:drop-mark 1.9s var(--ease) .4s 1 both;}

@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
  .diagram .barrier{opacity:.85;stroke-width:2;}
  .diagram .blocked-mark{opacity:1;}
  .diagram .probe{opacity:0;}
}

/* ---------- Responsive ---------- */
@media (max-width:1150px){
  .header-cta .posture-pill{display:none;}
}
@media (max-width:960px){
  .foot-top{grid-template-columns:1fr 1fr;}
  .grid-4{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:820px){
  .mainnav,.header-cta .posture-pill,.header-cta .btn--outline{display:none;}
  .menu-toggle{display:inline-flex;margin-left:auto;}
  .grid-2,.grid-3,.grid-4,.price-grid{grid-template-columns:1fr;}
  .mech-body{grid-template-columns:1fr;}
  .mech-body > div + div{border-left:0;border-top:1px solid var(--steel-line);}
  .foot-top{grid-template-columns:1fr 1fr;}
  .section{padding:64px 0;}
  .cta-banner{padding:40px 24px;}
  .pl-table tbody th{width:auto;display:block;}
}
@media (max-width:560px){
  .foot-top{grid-template-columns:1fr;}
  .grid-4{grid-template-columns:1fr;}
  .foot-meta{flex-direction:column;}
}

/* ---------- No-JS / mobile menu (checkbox hack, JS-free) ---------- */
.mobile-drawer{display:none;}
#mnav{position:absolute;left:-9999px;}
#mnav:checked ~ .mobile-drawer{display:block;}
.mobile-drawer{
  position:fixed;inset:64px 0 0;background:var(--obsidian);z-index:49;
  padding:24px;overflow:auto;border-top:1px solid var(--steel-line);
}
.mobile-drawer a{display:block;padding:14px 0;font-size:18px;color:var(--paper);border-bottom:1px solid var(--steel-line);}
.mobile-drawer .drawer-foot{margin-top:24px;display:grid;gap:12px;}
@media (min-width:821px){.mobile-drawer,#mnav{display:none;}}