/* HAXAL marketing site — "Signal on Graphite" design system
   Source of truth: docs/design/visual-identity.md (v0.1) */

:root {
  /* ground */
  --hx-bg-900:#0B0C10; --hx-bg-800:#111319; --hx-bg-700:#181B23;
  --hx-bg-600:#21252F; --hx-line:#2A2F3A;
  /* ink */
  --hx-ink-100:#F4F6FB; --hx-ink-300:#C2C8D6; --hx-ink-500:#8A93A3; --hx-ink-700:#5B6373;
  /* accent: Helix Cyan */
  --hx-cyan-300:#6FF1E0; --hx-cyan-500:#19E3C2; --hx-cyan-700:#0FB39A;
  /* secondary: Lineage Indigo (heritage #3A45D8) */
  --hx-indigo-300:#8E97F2; --hx-indigo-500:#3A45D8; --hx-indigo-700:#2B33A8;
  /* status */
  --hx-ok-500:#2FD27A; --hx-warn-500:#F2B33A; --hx-alert-500:#FF5A52; --hx-info-500:#19E3C2;
  --hx-ok-tint:#11271E; --hx-warn-tint:#2A2412; --hx-alert-tint:#2A1413;
  /* gradient (the ONLY sanctioned one) */
  --hx-helix-flow:linear-gradient(120deg,var(--hx-indigo-700) 0%,var(--hx-cyan-500) 100%);
  /* type */
  --hx-font-display:"Space Grotesk","Inter",system-ui,sans-serif;
  --hx-font-body:"Inter",system-ui,-apple-system,sans-serif;
  --hx-font-mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,monospace;
  /* scale */
  --hx-display-xl:clamp(2.6rem,1.3rem + 5.2vw,4.4rem);
  --hx-display-l:clamp(2rem,1.3rem + 2.6vw,2.9rem);
  --hx-display-m:clamp(1.5rem,1.1rem + 1.4vw,1.95rem);
  --hx-title:1.25rem; --hx-body:1rem; --hx-body-sm:.875rem; --hx-mono:.875rem; --hx-micro:.6875rem;
  /* spacing (8px base) */
  --hx-2:4px; --hx-1:8px; --hx-2x:12px; --hx-3:16px; --hx-4:24px;
  --hx-5:32px; --hx-6:48px; --hx-7:64px; --hx-8:96px;
  /* radius */
  --hx-r-sm:6px; --hx-r-md:10px; --hx-r-lg:16px; --hx-r-pill:999px;
  /* motion */
  --hx-ease-out:cubic-bezier(0.16,1,0.3,1);
  --hx-ease-in-out:cubic-bezier(0.65,0,0.35,1);
  --hx-dur-ui:200ms; --hx-dur-fast:120ms; --hx-dur-ambient:1000ms;
  /* effects */
  --hx-glow-cyan:0 0 0 1px rgba(25,227,194,.30),0 0 28px rgba(25,227,194,.16);
  --hx-ring-focus:0 0 0 2px var(--hx-bg-900),0 0 0 4px var(--hx-cyan-500);
  --hx-maxw:1200px;
  /* glyph color hooks (consumed by the inline logomark) */
  --gx-axis:var(--hx-line); --gx-indigo:var(--hx-indigo-500);
  --gx-indigo-300:var(--hx-indigo-300); --gx-cyan:var(--hx-cyan-500);
}
@media (prefers-reduced-motion: reduce){ :root{ --hx-dur-ambient:0ms; } }

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  background:var(--hx-bg-900);
  color:var(--hx-ink-300);
  font-family:var(--hx-font-body);
  font-size:var(--hx-body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
  /* atmosphere: faint indigo + cyan field on graphite (NO blob mesh) */
  background-image:
    radial-gradient(900px 520px at 82% -10%,rgba(25,227,194,.06),transparent 60%),
    radial-gradient(820px 540px at -8% 4%,rgba(58,69,216,.09),transparent 55%);
  background-attachment:fixed;
  overflow-x:hidden;
}
/* hairline control-room grid, very faint, fixed */
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(var(--hx-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--hx-line) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.18;
  -webkit-mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 72%);
  mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 72%);
}

h1,h2,h3,h4{font-family:var(--hx-font-display);color:var(--hx-ink-100);font-weight:500;letter-spacing:-0.01em;line-height:1.12;margin:0}
p{margin:0}
a{color:var(--hx-cyan-300);text-decoration:none;transition:color var(--hx-dur-fast) var(--hx-ease-out)}
a:hover{color:var(--hx-cyan-500)}
code,kbd,pre,.mono{font-family:var(--hx-font-mono)}
img,svg{max-width:100%}
:focus-visible{outline:none;box-shadow:var(--hx-ring-focus);border-radius:var(--hx-r-sm)}
::selection{background:rgba(25,227,194,.24);color:var(--hx-ink-100)}

.micro{font-size:var(--hx-micro);letter-spacing:.10em;text-transform:uppercase;font-weight:600;color:var(--hx-ink-500);font-family:var(--hx-font-body)}
.mono-label{font-family:var(--hx-font-mono);font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--hx-cyan-300)}
.grad{background:var(--hx-helix-flow);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.cyan{color:var(--hx-cyan-500)}
.indigo{color:var(--hx-indigo-300)}

.wrap{max-width:var(--hx-maxw);margin:0 auto;padding:0 var(--hx-4)}
.section{padding:var(--hx-8) 0}
.section-tight{padding:var(--hx-7) 0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:var(--hx-3)}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--hx-cyan-500);display:inline-block}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:saturate(140%) blur(6px);
  background:rgba(11,12,16,.72);border-bottom:1px solid var(--hx-line)}
.nav-inner{max-width:var(--hx-maxw);margin:0 auto;display:flex;align-items:center;gap:var(--hx-4);
  padding:14px var(--hx-4)}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand .wm{font-family:var(--hx-font-display);font-weight:700;letter-spacing:.06em;color:var(--hx-ink-100);font-size:1.1rem}
.brand .glyph{width:27px;height:27px;flex:0 0 auto}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:var(--hx-4)}
.nav-links a{color:var(--hx-ink-300);font-size:.92rem;padding:8px 12px;border-radius:var(--hx-r-sm);font-weight:500;
  border:1px solid transparent}
.nav-links a:hover{color:var(--hx-ink-100);background:var(--hx-bg-700)}
.nav-links a[aria-current="page"]{color:var(--hx-ink-100);border-color:var(--hx-line);background:var(--hx-bg-800)}
.nav-cta{margin-left:auto;display:flex;align-items:center;gap:var(--hx-2x)}
.nav-toggle{display:none;margin-left:auto;background:var(--hx-bg-700);border:1px solid var(--hx-line);color:var(--hx-ink-100);
  border-radius:var(--hx-r-sm);padding:8px 12px;font-size:.85rem;cursor:pointer}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--hx-font-body);font-weight:600;font-size:.92rem;
  padding:11px 18px;border-radius:var(--hx-r-md);border:1px solid transparent;cursor:pointer;
  transition:transform var(--hx-dur-fast) var(--hx-ease-out),box-shadow var(--hx-dur-ui) var(--hx-ease-out),background var(--hx-dur-fast)}
.btn-primary{background:var(--hx-cyan-500);color:#04110E;box-shadow:var(--hx-glow-cyan)}
.btn-primary:hover{color:#04110E;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(25,227,194,.5),0 0 36px rgba(25,227,194,.28)}
.btn-ghost{background:transparent;color:var(--hx-ink-100);border-color:var(--hx-line)}
.btn-ghost:hover{color:var(--hx-ink-100);border-color:var(--hx-cyan-700);background:var(--hx-bg-800)}
.btn-link{color:var(--hx-ink-300);padding:11px 6px}
.btn-link:hover{color:var(--hx-cyan-300)}
.btn-sm{padding:8px 14px;font-size:.86rem}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none}
.btn .arr{transition:transform var(--hx-dur-fast) var(--hx-ease-out)}
.btn:hover .arr{transform:translateX(3px)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:var(--hx-8) 0 var(--hx-7)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:var(--hx-7);align-items:center}
.hero h1{font-size:var(--hx-display-xl);font-weight:700;letter-spacing:-0.02em;margin:0 0 var(--hx-4)}
.hero .sub{font-size:1.12rem;color:var(--hx-ink-300);max-width:54ch;margin-bottom:var(--hx-5)}
.hero-cta{display:flex;flex-wrap:wrap;align-items:center;gap:var(--hx-2x);margin-bottom:var(--hx-5)}
.trust-chips{display:flex;flex-wrap:wrap;gap:var(--hx-2x);color:var(--hx-ink-500);font-size:.82rem}
.trust-chips span{display:inline-flex;align-items:center;gap:7px}
.trust-chips span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--hx-cyan-500);box-shadow:0 0 8px rgba(25,227,194,.6)}

/* axis rail behind hero */
.axis{position:absolute;top:0;bottom:0;left:32%;width:1px;background:linear-gradient(180deg,transparent,var(--hx-line) 12%,var(--hx-line) 88%,transparent);z-index:-1}

/* ---------- two-pane agent demo ---------- */
.agentview{border:1px solid var(--hx-line);border-radius:var(--hx-r-lg);overflow:hidden;
  background:linear-gradient(180deg,var(--hx-bg-800),var(--hx-bg-900));box-shadow:0 24px 80px -40px rgba(0,0,0,.8)}
.agentview .av-bar{display:flex;align-items:center;gap:8px;padding:10px 14px;border-bottom:1px solid var(--hx-line);
  background:var(--hx-bg-700)}
.av-dot{width:9px;height:9px;border-radius:50%;background:var(--hx-bg-600)}
.av-bar .av-title{margin-left:8px;font-family:var(--hx-font-mono);font-size:.74rem;color:var(--hx-ink-500)}
.av-body{display:grid;grid-template-columns:1fr 1fr}
.av-board{padding:var(--hx-3);border-right:1px solid var(--hx-line);min-width:0}
.av-chat{padding:var(--hx-3);display:flex;flex-direction:column;gap:10px;min-width:0;background:var(--hx-bg-900)}
.board-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.board-head .micro{margin:0}
.minicards{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.mc{background:var(--hx-bg-700);border:1px solid var(--hx-line);border-radius:var(--hx-r-sm);padding:10px}
.mc.flag{background:var(--hx-alert-tint);border-color:rgba(255,90,82,.35);animation:pulse 2.4s var(--hx-ease-in-out) infinite}
@media (prefers-reduced-motion: reduce){.mc.flag{animation:none}}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(255,90,82,0)}50%{box-shadow:0 0 0 1px rgba(255,90,82,.35),0 0 18px rgba(255,90,82,.18)}}
.mc .mc-h{display:flex;align-items:center;gap:7px;margin-bottom:8px}
.mc .mono{font-size:.66rem;color:var(--hx-ink-100);font-weight:500}
.mc .dot{width:7px;height:7px;border-radius:50%}
.dot-ok{background:var(--hx-ok-500)}.dot-warn{background:var(--hx-warn-500)}.dot-alert{background:var(--hx-alert-500)}
.mc .big{font-family:var(--hx-font-mono);font-size:1.05rem;color:var(--hx-ink-100)}
.mc .lbl{font-size:.6rem;color:var(--hx-ink-500);text-transform:uppercase;letter-spacing:.05em}
.bubble{border-radius:var(--hx-r-md);padding:10px 12px;font-size:.84rem;max-width:92%}
.bubble.user{align-self:flex-end;background:var(--hx-bg-700);border:1px solid var(--hx-line);color:var(--hx-ink-100)}
.bubble.agent{align-self:flex-start;background:var(--hx-bg-800);border:1px solid var(--hx-line)}
.bubble.agent .evid{margin-top:8px;display:flex;flex-wrap:wrap;gap:6px}
.chip{font-family:var(--hx-font-mono);font-size:.64rem;padding:3px 7px;border-radius:var(--hx-r-pill);
  border:1px solid var(--hx-line);background:var(--hx-bg-900);color:var(--hx-ink-300)}
.chip.conf{color:var(--hx-ok-500);border-color:rgba(47,210,122,.4)}
.chip.live{color:var(--hx-cyan-300);border-color:rgba(25,227,194,.4)}
.confbar{height:5px;border-radius:var(--hx-r-pill);background:var(--hx-bg-600);overflow:hidden;margin-top:8px}
.confbar i{display:block;height:100%;width:92%;background:var(--hx-helix-flow);border-radius:inherit}

/* ---------- trace strip ---------- */
.trace{display:flex;align-items:stretch;border:1px solid var(--hx-line);border-radius:var(--hx-r-md);overflow:hidden;
  background:var(--hx-bg-800);counter-reset:tn}
.trace .node{flex:1;padding:var(--hx-3) var(--hx-3);border-right:1px solid var(--hx-line);position:relative}
.trace .node:last-child{border-right:none}
.trace .node .t{font-family:var(--hx-font-mono);font-size:.7rem;color:var(--hx-cyan-300);text-transform:uppercase;letter-spacing:.06em;display:flex;align-items:center;gap:6px}
.trace .node .t::before{counter-increment:tn;content:counter(tn,decimal-leading-zero);color:var(--hx-ink-700)}
.trace .node .d{font-size:.82rem;color:var(--hx-ink-300);margin-top:6px}
.trace .node .m{font-family:var(--hx-font-mono);font-size:.68rem;color:var(--hx-ink-500);margin-top:6px}
.trace .node.verify{background:var(--hx-ok-tint)}
.trace .node.verify .t{color:var(--hx-ok-500)}
.trace .node.verify .t::before{color:var(--hx-ok-500)}
@media(max-width:760px){.trace{flex-direction:column}.trace .node{border-right:none;border-bottom:1px solid var(--hx-line)}.trace .node:last-child{border-bottom:none}}

/* ---------- cards / grids ---------- */
.grid{display:grid;gap:var(--hx-3)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--hx-bg-800);border:1px solid var(--hx-line);border-radius:var(--hx-r-lg);padding:var(--hx-4);
  transition:border-color var(--hx-dur-ui) var(--hx-ease-out),transform var(--hx-dur-ui) var(--hx-ease-out),background var(--hx-dur-ui)}
.card:hover{border-color:var(--hx-bg-600);transform:translateY(-2px);background:var(--hx-bg-700)}
.card h3{font-size:var(--hx-title);margin-bottom:8px}
.card p{font-size:.92rem;color:var(--hx-ink-300)}
.card .k{display:inline-block;font-family:var(--hx-font-mono);font-size:.66rem;text-transform:uppercase;letter-spacing:.06em;
  color:var(--hx-cyan-300);margin-bottom:12px}
.card .ico{width:38px;height:38px;border-radius:var(--hx-r-md);display:grid;place-items:center;margin-bottom:14px;
  border:1px solid var(--hx-line);background:var(--hx-bg-900);color:var(--hx-cyan-500)}

.lead{font-size:1.05rem;color:var(--hx-ink-300);max-width:62ch}
h2.head{font-size:var(--hx-display-l);margin-bottom:var(--hx-3)}
h2.head + .lead{margin-bottom:var(--hx-6)}

/* verb triad */
.triad{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--hx-line);border-radius:var(--hx-r-lg);overflow:hidden}
.triad .v{padding:var(--hx-5);border-right:1px solid var(--hx-line);position:relative;background:var(--hx-bg-800)}
.triad .v:last-child{border-right:none}
.triad .v .num{font-family:var(--hx-font-mono);color:var(--hx-cyan-700);font-size:.8rem}
.triad .v h3{font-size:1.5rem;margin:10px 0 8px;font-family:var(--hx-font-display)}
.triad .v p{font-size:.92rem;color:var(--hx-ink-300)}
.triad .v.verify{background:linear-gradient(180deg,var(--hx-ok-tint),var(--hx-bg-800))}
@media(max-width:820px){.triad{grid-template-columns:1fr}.triad .v{border-right:none;border-bottom:1px solid var(--hx-line)}.triad .v:last-child{border-bottom:none}}

/* comparison matrix */
.matrix{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--hx-line);border-radius:var(--hx-r-lg);overflow:hidden}
.matrix th,.matrix td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--hx-line);vertical-align:top;font-size:.9rem}
.matrix thead th{background:var(--hx-bg-700);color:var(--hx-ink-100);font-family:var(--hx-font-display);font-weight:500;font-size:.95rem}
.matrix thead th.haxal{color:var(--hx-cyan-300)}
.matrix tbody tr:last-child td{border-bottom:none}
.matrix td.task{color:var(--hx-ink-100);font-weight:500;width:24%}
.matrix td.pass{color:var(--hx-ink-500)}
.matrix td.haxal{color:var(--hx-ink-100);background:rgba(25,227,194,.04)}
.matrix td.haxal strong{color:var(--hx-cyan-300);font-weight:600}
@media(max-width:760px){.matrix thead{display:none}.matrix td{display:block;border-bottom:none}.matrix tbody tr{display:block;border-bottom:1px solid var(--hx-line);padding:8px 0}}

/* schema triptych */
.codeblock{background:var(--hx-bg-900);border:1px solid var(--hx-line);border-radius:var(--hx-r-md);padding:var(--hx-3);
  font-family:var(--hx-font-mono);font-size:.78rem;line-height:1.7;overflow:auto;color:var(--hx-ink-300);margin:0}
.codeblock .key{color:var(--hx-ink-100)}
.codeblock .val{color:var(--hx-cyan-300)}
.codeblock .ref{color:var(--hx-indigo-300)}
.codeblock .com{color:var(--hx-ink-700)}
.triptych{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--hx-3);align-items:start}
.triptych .stepcap{font-family:var(--hx-font-mono);font-size:.68rem;color:var(--hx-cyan-700);text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px;display:block}
@media(max-width:880px){.triptych{grid-template-columns:1fr}}

/* gradient band */
.gradband{border-radius:var(--hx-r-lg);background:var(--hx-helix-flow);padding:1px}
.gradband > .inner{background:var(--hx-bg-900);border-radius:calc(var(--hx-r-lg) - 1px);padding:var(--hx-6);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--hx-4)}
.gradband h2{font-size:var(--hx-display-m);margin-bottom:8px}

/* trust primitives list */
.prims{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--hx-3)}
.prim{border:1px solid var(--hx-line);border-radius:var(--hx-r-md);padding:var(--hx-4);background:var(--hx-bg-800)}
.prim .k{font-family:var(--hx-font-mono);font-size:.68rem;color:var(--hx-cyan-300);text-transform:uppercase;letter-spacing:.05em}
.prim h4{font-size:1.05rem;margin:8px 0 6px}
.prim p{font-size:.86rem;color:var(--hx-ink-300)}
@media(max-width:880px){.prims{grid-template-columns:1fr}}

/* feature list (icon rows) */
.feat-list{list-style:none;padding:0;margin:var(--hx-4) 0 0;display:flex;flex-direction:column;gap:14px}
.feat-list li{display:flex;gap:12px;align-items:flex-start;font-size:.95rem;color:var(--hx-ink-300)}
.feat-list .fdot{margin-top:7px;width:8px;height:8px;border-radius:50%;flex:0 0 auto}

/* persona / use-case rows */
.usecase{border:1px solid var(--hx-line);border-radius:var(--hx-r-lg);overflow:hidden;background:var(--hx-bg-800);margin-bottom:var(--hx-4)}
.usecase .uc-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px;padding:var(--hx-4) var(--hx-5) 0}
.usecase .uc-head .k{font-family:var(--hx-font-mono);font-size:.66rem;text-transform:uppercase;letter-spacing:.06em;color:var(--hx-cyan-300)}
.usecase .uc-head .who{font-size:.78rem;color:var(--hx-ink-500)}
.usecase .uc-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:var(--hx-5);padding:var(--hx-3) var(--hx-5) var(--hx-5)}
.usecase h3{font-size:1.4rem;margin:8px 0 10px}
.usecase p{font-size:.95rem;color:var(--hx-ink-300)}
.uc-side{border:1px solid var(--hx-line);border-radius:var(--hx-r-md);background:var(--hx-bg-900);padding:var(--hx-4);align-self:start}
.uc-side .micro{display:block;margin-bottom:10px}
.uc-side .bubble{max-width:100%;margin-bottom:8px}
@media(max-width:820px){.usecase .uc-grid{grid-template-columns:1fr}}

/* integrations grid */
.intg{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--hx-3)}
.intg .ig{border:1px solid var(--hx-line);border-radius:var(--hx-r-md);background:var(--hx-bg-800);padding:var(--hx-4);
  transition:border-color var(--hx-dur-ui) var(--hx-ease-out),transform var(--hx-dur-ui) var(--hx-ease-out)}
.intg .ig:hover{border-color:var(--hx-bg-600);transform:translateY(-2px)}
.intg .ig-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.intg .ig-mark{width:34px;height:34px;border-radius:var(--hx-r-sm);display:grid;place-items:center;
  border:1px solid var(--hx-line);background:var(--hx-bg-900);font-family:var(--hx-font-mono);font-size:.9rem;color:var(--hx-cyan-300)}
.intg .ig .tag{font-family:var(--hx-font-mono);font-size:.6rem;text-transform:uppercase;letter-spacing:.05em;color:var(--hx-ink-500);
  border:1px solid var(--hx-line);border-radius:var(--hx-r-pill);padding:2px 8px}
.intg .ig h4{font-size:1.02rem;margin:0 0 6px}
.intg .ig p{font-size:.85rem;color:var(--hx-ink-300)}
@media(max-width:880px){.intg{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.intg{grid-template-columns:1fr}}

/* FAQ */
.faq details{border:1px solid var(--hx-line);border-radius:var(--hx-r-md);padding:0;margin-bottom:10px;background:var(--hx-bg-800);overflow:hidden}
.faq summary{cursor:pointer;padding:16px 18px;font-family:var(--hx-font-display);font-weight:500;color:var(--hx-ink-100);
  font-size:1rem;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--hx-cyan-500);font-family:var(--hx-font-mono);font-size:1.2rem;transition:transform var(--hx-dur-ui)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 18px 18px;font-size:.92rem;color:var(--hx-ink-300);max-width:70ch}

/* ---------- signup form ---------- */
.signup-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--hx-7);align-items:start}
.form-card{background:var(--hx-bg-800);border:1px solid var(--hx-line);border-radius:var(--hx-r-lg);padding:var(--hx-5)}
.field{margin-bottom:var(--hx-4)}
.field label{display:block;font-size:.8rem;font-weight:600;color:var(--hx-ink-100);margin-bottom:7px}
.field label .req{color:var(--hx-cyan-500)}
.field input,.field select,.field textarea{
  width:100%;background:var(--hx-bg-900);border:1px solid var(--hx-line);border-radius:var(--hx-r-md);
  color:var(--hx-ink-100);font-family:var(--hx-font-body);font-size:.95rem;padding:11px 13px;
  transition:border-color var(--hx-dur-fast) var(--hx-ease-out)}
.field textarea{min-height:96px;resize:vertical;line-height:1.5}
.field input::placeholder,.field textarea::placeholder{color:var(--hx-ink-700)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--hx-cyan-700);box-shadow:var(--hx-glow-cyan)}
.field input[aria-invalid="true"],.field select[aria-invalid="true"],.field textarea[aria-invalid="true"]{border-color:var(--hx-alert-500)}
.field .err{display:none;color:var(--hx-alert-500);font-size:.76rem;margin-top:6px;font-family:var(--hx-font-mono)}
.field.invalid .err{display:block}
.form-note{font-size:.78rem;color:var(--hx-ink-500);margin-top:var(--hx-3)}
.form-status{border-radius:var(--hx-r-md);padding:13px 15px;font-size:.9rem;margin-bottom:var(--hx-4);display:none}
.form-status.show{display:block}
.form-status.ok{background:var(--hx-ok-tint);border:1px solid rgba(47,210,122,.4);color:var(--hx-ink-100)}
.form-status.bad{background:var(--hx-alert-tint);border:1px solid rgba(255,90,82,.4);color:var(--hx-ink-100)}
.form-success{text-align:left;display:none}
.form-success.show{display:block}
.form-success .tick{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;margin-bottom:var(--hx-3);
  background:var(--hx-ok-tint);border:1px solid rgba(47,210,122,.5);color:var(--hx-ok-500)}
@media(max-width:880px){.signup-grid{grid-template-columns:1fr;gap:var(--hx-5)}}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--hx-line);margin-top:var(--hx-8);padding:var(--hx-7) 0 var(--hx-6);position:relative}
.footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:2px;background:var(--hx-helix-flow);opacity:.7}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:var(--hx-5)}
.foot-grid h5{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--hx-ink-500);font-family:var(--hx-font-body);
  font-weight:600;margin:0 0 14px}
.foot-grid ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.foot-grid a{color:var(--hx-ink-300);font-size:.9rem}
.foot-grid a:hover{color:var(--hx-cyan-300)}
.foot-brand p{font-size:.88rem;color:var(--hx-ink-500);max-width:34ch;margin-top:12px}
.ask-ai{margin-top:18px;border:1px solid var(--hx-line);border-radius:var(--hx-r-md);padding:12px 14px;background:var(--hx-bg-800)}
.ask-ai .micro{margin-bottom:8px;display:block}
.ask-ai a{font-family:var(--hx-font-mono);font-size:.74rem;margin-right:12px}
.foot-base{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:var(--hx-6);padding-top:var(--hx-4);
  border-top:1px solid var(--hx-line);color:var(--hx-ink-500);font-size:.82rem}
.foot-base .mono{font-family:var(--hx-font-mono);font-size:.74rem}

/* ---------- reveal-on-load stagger ---------- */
.reveal{opacity:0;transform:translateY(14px);animation:reveal .7s var(--hx-ease-out) forwards}
@keyframes reveal{to{opacity:1;transform:none}}
@media (prefers-reduced-motion: reduce){.reveal{animation:none;opacity:1;transform:none}}
.d1{animation-delay:.05s}.d2{animation-delay:.14s}.d3{animation-delay:.24s}.d4{animation-delay:.34s}.d5{animation-delay:.44s}

/* helix idle (hero glyph) */
.helix-spin{animation:helixspin 14s linear infinite;transform-origin:center}
@media (prefers-reduced-motion: reduce){.helix-spin{animation:none}}
@keyframes helixspin{to{transform:rotate(360deg)}}

/* 404 */
.notfound{min-height:62vh;display:grid;place-items:center;text-align:center}
.notfound .code{font-family:var(--hx-font-mono);font-size:5rem;color:var(--hx-ink-700)}
.notfound h1{font-size:var(--hx-display-l);margin:8px 0 14px}

/* ---------- responsive ---------- */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:var(--hx-5)}
  .axis{display:none}
  .grid-3,.grid-4{grid-template-columns:1fr 1fr}
  .prims{grid-template-columns:1fr 1fr}
}
@media(max-width:720px){
  .nav-links,.nav-cta .btn-link{display:none}
  .nav-toggle{display:inline-block}
  .nav.open .nav-links{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;
    background:var(--hx-bg-800);border-bottom:1px solid var(--hx-line);padding:10px;margin:0;gap:4px}
  .nav.open .nav-links a{width:100%}
  .grid-3,.grid-2,.grid-4,.foot-grid,.triptych{grid-template-columns:1fr}
  .prims{grid-template-columns:1fr}
  .av-body{grid-template-columns:1fr}
  .av-board{border-right:none;border-bottom:1px solid var(--hx-line)}
  .section{padding:var(--hx-7) 0}
  .gradband > .inner{padding:var(--hx-4)}
}

/* ---------- brand art (generated abstract motifs, ambient layers) ----------
   Decorative only (aria-hidden, pointer-events:none). Sit behind/beside content
   at low opacity so they read as intentional brand texture, not stock imagery.
   Source PNGs are transparent (luminance-keyed on graphite). See assets/img/. */
.brandart{position:absolute;pointer-events:none;z-index:0;user-select:none}
.brandart img{display:block;width:100%;height:auto}
.has-art{position:relative;overflow:hidden}
.has-art > .wrap{position:relative;z-index:1}

/* hero motif: a helix drifting off the upper-right, behind the two-pane view.
   z-index:-1 so the live agent card sits cleanly on top; the strand bleeds
   past the card edges as ambient brand texture. */
.art-hero{top:-14%;right:-12%;width:min(64%,820px);
  opacity:.85;z-index:-1;
  -webkit-mask-image:radial-gradient(circle at 62% 55%,#000 30%,transparent 74%);
  mask-image:radial-gradient(circle at 62% 55%,#000 30%,transparent 74%)}

/* product: a run-trace ribbon drifting across the upper-right of the section,
   behind the header and the schedule code block */
.art-trace{top:6%;right:-5%;width:min(66%,760px);opacity:.6;z-index:0;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 22%);
  mask-image:linear-gradient(90deg,transparent,#000 22%)}

/* solutions hero: agent constellation drifting top-right */
.art-grid{top:-18%;right:-4%;width:min(46%,520px);opacity:.42;
  -webkit-mask-image:radial-gradient(circle at 70% 40%,#000 35%,transparent 72%);
  mask-image:radial-gradient(circle at 70% 40%,#000 35%,transparent 72%)}

/* integrations hero: sources braiding into one axis, right side */
.art-converge{top:50%;right:-3%;width:min(54%,680px);transform:translateY(-46%);
  opacity:.6;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 22%);
  mask-image:linear-gradient(90deg,transparent,#000 22%)}

/* about: tall helix weave, faint texture behind the commitments band */
.art-weave{top:-6%;right:6%;width:min(26%,320px);opacity:.4;
  -webkit-mask-image:linear-gradient(180deg,#000 70%,transparent);
  mask-image:linear-gradient(180deg,#000 70%,transparent)}

@media (prefers-reduced-motion: no-preference){
  .art-hero,.art-converge{transition:opacity 600ms var(--hx-ease-out)}
}
@media(max-width:980px){
  .art-hero,.art-converge{display:none}
  .art-grid{opacity:.3;width:60%}
}
@media(max-width:720px){
  .art-trace,.art-grid,.art-weave{display:none}
}