/* ===========================================================
   wav3line — site stylesheet
   See DESIGN.md for the token rationale and information architecture.
   =========================================================== */

:root{
  --ink:#0B0E14; --ink-2:#12172A; --paper:#F5F3EE; --paper-2:#EBE7DD;
  --signal:#45E0C8; --amber:#E8A63A;
  --line:#232A3D; --line-light:#D8D3C6;
  --ink-mute:#8C93A6; --mute:#6B6558;
  /* Darkened variants of --amber/--signal for text/icons on paper — the bright
     versions above are ~1.5–1.9:1 there and fail WCAG AA; these clear 4.5:1+. */
  --amber-on-light:#8A5F17;
  --signal-on-light:#1b7a63;
  --shadow-md:0 20px 44px rgba(11,14,20,.16);
  --ease:cubic-bezier(.4,0,.2,1);
  --font-display:'Fraunces', Georgia, serif;
  --font-body:'Manrope', -apple-system, "Segoe UI", sans-serif;
  --font-mono:'IBM Plex Mono', ui-monospace, Menlo, Consolas, monospace;
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{ font-family:var(--font-body); color:var(--ink); line-height:1.6; background:var(--paper); -webkit-font-smoothing:antialiased; }
h1,h2,h3{ font-family:var(--font-display); font-weight:600; }
a{ color:inherit; text-decoration:none; }
img{ display:block; max-width:100%; }
.wrap{ max-width:1120px; margin:0 auto; padding:0 24px; }
section{ padding:96px 0; }

.mono{ font-family:var(--font-mono); letter-spacing:.04em; }
.eyebrow{ font-family:var(--font-mono); font-size:11.5px; font-weight:500; letter-spacing:.14em; text-transform:uppercase; color:var(--signal); margin-bottom:14px; }
.eyebrow.on-paper{ color:var(--amber-on-light); }
.tag{ display:inline-block; font-family:var(--font-mono); font-size:11px; letter-spacing:.1em; color:var(--mute); border:1px solid var(--line-light); padding:4px 10px; border-radius:3px; margin-bottom:16px; }
.bullets{ list-style:none; }
.bullets li{ font-size:14px; color:var(--ink); padding:6px 0 6px 20px; position:relative; }
.bullets li::before{ content:"—"; position:absolute; left:0; color:var(--amber-on-light); }

/* Sections on the ink background reuse this instead of repeating per-section overrides */
.on-ink .section-head h2{ color:#fff; }
.on-ink .section-head p{ color:var(--ink-mute); }

/* Accessibility: skip link + visible keyboard focus */
.skip-link{ position:absolute; left:-9999px; top:0; background:var(--signal); color:var(--ink); padding:12px 18px; font-family:var(--font-mono); font-size:13px; font-weight:600; z-index:100; border-radius:0 0 6px 0; }
.skip-link:focus{ left:0; }
a:focus-visible, button:focus-visible, summary:focus-visible, .nav-toggle:focus-visible{ outline:2px solid var(--signal); outline-offset:3px; border-radius:2px; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}

/* ---------- Nav ---------- */
header.nav{ position:sticky; top:0; z-index:50; background:rgba(11,14,20,.92); backdrop-filter:blur(8px); border-bottom:1px solid var(--line); }
.nav-inner{ max-width:1120px; margin:0 auto; padding:14px 24px; display:flex; align-items:center; justify-content:space-between; gap:16px; }
.brand{ display:flex; align-items:center; gap:10px; color:#fff; font-family:var(--font-mono); font-size:16px; font-weight:600; letter-spacing:.01em; }
.brand img{ width:32px; height:32px; }
.brand b{ color:var(--signal); font-weight:700; }
nav.links{ display:flex; align-items:center; gap:22px; }
nav.links a{ font-family:var(--font-mono); color:var(--ink-mute); font-size:12.5px; letter-spacing:.03em; transition:color .2s var(--ease); white-space:nowrap; }
nav.links a:hover, nav.links a:focus-visible{ color:#fff; }
nav.links a.nav-cta{ color:var(--ink); background:var(--amber); padding:9px 16px; border-radius:3px; }
nav.links a.nav-cta:hover{ color:var(--ink); filter:brightness(1.08); }

.nav-toggle{ display:none; width:36px; height:36px; border-radius:6px; background:rgba(255,255,255,.06); border:1px solid var(--line); cursor:pointer; position:relative; }
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{ content:""; position:absolute; left:9px; right:9px; height:1.5px; background:#fff; transition:transform .25s var(--ease), opacity .25s var(--ease); }
.nav-toggle span{ top:17px; }
.nav-toggle span::before{ top:-6px; }
.nav-toggle span::after{ top:6px; }
.nav-toggle[aria-expanded="true"] span{ background:transparent; }
.nav-toggle[aria-expanded="true"] span::before{ transform:translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after{ transform:translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero{ background:var(--ink); color:#fff; padding:86px 0 0; position:relative; overflow:hidden; }
.hero-trace{ position:absolute; inset:0; width:100%; height:100%; opacity:.55; }
.hero-trace path{ stroke-dasharray:1500; stroke-dashoffset:1500; animation:draw 2.4s var(--ease) .15s forwards; }
@keyframes draw{ to{ stroke-dashoffset:0; } }
@media (prefers-reduced-motion: reduce){ .hero-trace path{ stroke-dashoffset:0; animation:none; } }

.hero .wrap{ position:relative; z-index:1; }
.hero-grid{ display:grid; grid-template-columns:1.35fr 1fr; gap:48px; align-items:end; padding-bottom:64px; }
.hero h1{ font-size:50px; line-height:1.1; letter-spacing:-.01em; max-width:620px; margin-bottom:22px; }
.hero h1 em{ font-style:italic; font-weight:300; color:var(--signal); }
.hero p{ font-size:16.5px; color:var(--ink-mute); max-width:540px; margin-bottom:34px; }

.btn{ display:inline-block; padding:13px 24px; border-radius:3px; font-family:var(--font-mono); font-size:13px; font-weight:500; letter-spacing:.02em; cursor:pointer; transition:transform .2s var(--ease), filter .2s var(--ease), background .2s var(--ease); }
.btn-primary{ background:var(--amber); color:var(--ink); }
.btn-primary:hover{ filter:brightness(1.08); transform:translateY(-1px); }
.btn-ghost{ background:transparent; color:#fff; border:1px solid var(--line); margin-left:10px; }
.btn-ghost:hover{ border-color:var(--ink-mute); transform:translateY(-1px); }

/* Products panel — signature element */
.status-panel{ background:var(--ink-2); border:1px solid var(--line); border-radius:8px; padding:18px 20px; opacity:0; transform:translateY(10px); animation:settle .5s var(--ease) 1.4s forwards; }
@keyframes settle{ to{ opacity:1; transform:translateY(0); } }
@media (prefers-reduced-motion: reduce){ .status-panel{ opacity:1; transform:none; animation:none; } }
.status-panel-head{ font-family:var(--font-mono); font-size:11px; letter-spacing:.12em; color:var(--signal); margin-bottom:14px; }
@keyframes pulse{ 0%,100%{ opacity:1; } 50%{ opacity:.45; } }
.status-row{ display:flex; align-items:baseline; justify-content:space-between; gap:12px; font-family:var(--font-mono); font-size:12.5px; padding:8px 0; border-top:1px solid var(--line); }
.status-row:first-of-type{ border-top:none; }
.status-row .p{ color:#fff; font-weight:500; }
.status-row .v{ color:var(--ink-mute); }

/* ---------- Status bar strip ---------- */
.statusbar{ background:var(--ink); border-top:1px solid var(--line); }
.statusbar .wrap{ display:flex; flex-wrap:wrap; gap:28px; padding:26px 24px; }
.statusbar .item{ flex:1; min-width:170px; font-family:var(--font-mono); }
.statusbar .item .k{ display:block; font-size:10.5px; letter-spacing:.12em; color:var(--ink-mute); margin-bottom:6px; }
.statusbar .item .v{ font-size:14px; color:var(--signal); font-weight:500; }

/* ---------- Section headers ---------- */
.section-head{ max-width:640px; margin-bottom:56px; }
.section-head h2{ font-size:34px; color:var(--ink); margin-bottom:14px; letter-spacing:-.01em; }
.section-head p{ color:var(--mute); font-size:15.5px; }

/* ---------- Products (asymmetric rows) ---------- */
.product-row{ display:grid; grid-template-columns:.85fr 1.15fr; gap:56px; align-items:center; }
.product-row + .product-row{ margin-top:88px; }
.product-row.reverse{ grid-template-columns:1.15fr .85fr; }
.product-row.reverse .product-copy{ order:1; }
.product-row.reverse .product-visual{ order:2; }

.map-panel{ aspect-ratio:4/3; border-radius:12px; background:var(--ink-2); position:relative; overflow:hidden; border:1px solid var(--line); }
.map-panel::before{ content:""; position:absolute; inset:0; background-image:linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size:28px 28px; opacity:.5; }
.map-panel .chip{ position:absolute; top:16px; left:16px; font-family:var(--font-mono); font-size:10.5px; letter-spacing:.08em; color:#fff; background:rgba(0,0,0,.35); border:1px solid var(--line); padding:5px 10px; border-radius:3px; z-index:2; }
.map-panel svg{ position:absolute; inset:0; width:100%; height:100%; }
.map-panel .stop{ fill:var(--ink-mute); }
.map-panel .here{ fill:var(--amber); }
.map-panel.gate .here{ fill:var(--signal); }
.map-panel .here-ring{ fill:none; stroke:var(--amber); stroke-width:1.5; opacity:.5; animation:pulse 2.2s ease-in-out infinite; }
.map-panel.gate .here-ring{ stroke:var(--signal); }

.product-copy h3{ font-size:28px; color:var(--ink); margin-bottom:12px; }
.product-copy p{ color:var(--mute); font-size:15px; margin-bottom:18px; }
.product-copy ul{ margin-bottom:20px; }
.product-row.reverse .product-copy .bullets li::before{ color:var(--signal-on-light); }
.product-meta{ font-family:var(--font-mono); font-size:11.5px; letter-spacing:.06em; color:var(--mute); margin-bottom:18px; }
.row-link{ display:inline-flex; align-items:center; gap:6px; font-family:var(--font-mono); font-size:13px; font-weight:500; color:var(--ink); border-bottom:1px solid var(--ink); padding-bottom:2px; transition:opacity .2s var(--ease); }
.row-link:hover{ opacity:.6; }

/* ---------- Technology: signal-fusion diagram ---------- */
.tech{ background:var(--ink); color:#fff; }
.fusion{ max-width:760px; }
.fusion-row{ display:grid; grid-template-columns:150px 1fr; gap:20px; align-items:center; padding:20px 0; border-top:1px solid var(--line); }
.fusion-row:first-child{ border-top:none; }
.fusion-label{ font-family:var(--font-mono); font-size:12px; letter-spacing:.08em; color:var(--ink-mute); }
.fusion-row.result .fusion-label{ color:var(--signal); }
.fusion-main{ display:flex; flex-direction:column; gap:8px; }
.fusion-trace{ height:2px; width:100%; position:relative; }
.source.ble .fusion-trace{ background:repeating-linear-gradient(90deg, var(--amber) 0 7px, transparent 7px 13px); }
.source.wifi .fusion-trace{ background:repeating-linear-gradient(90deg, var(--ink-mute) 0 2px, transparent 2px 8px); }
.source.motion .fusion-trace{ background:repeating-linear-gradient(90deg, var(--ink-mute) 0 3px, transparent 3px 6px, var(--ink-mute) 6px 9px, transparent 9px 16px); }
.result .fusion-trace{ background:var(--signal); }
.ping{ position:absolute; top:50%; left:0; width:9px; height:9px; margin-top:-4.5px; border-radius:50%; background:var(--signal); box-shadow:0 0 0 4px rgba(69,224,200,.22); animation:pingmove 3.4s linear infinite; }
@keyframes pingmove{ 0%{ left:0; } 100%{ left:calc(100% - 9px); } }
.fusion-desc{ font-size:13.5px; color:var(--ink-mute); }
.result .fusion-desc{ color:#C9E9E2; }

/* ---------- AI-powered navigation / generic 3-up info cards ---------- */
.card-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.info-card{ background:var(--paper-2); border:1px solid var(--line-light); border-radius:8px; padding:24px; }
.info-card .k{ display:block; font-family:var(--font-mono); font-size:11px; letter-spacing:.1em; color:var(--amber-on-light); margin-bottom:10px; }
.info-card p{ font-size:14px; color:var(--mute); }

/* ---------- Industries: benefit rows ---------- */
.benefit-grid{ display:grid; grid-template-columns:1fr 1fr; gap:40px; }
.benefit-card h3{ font-size:21px; color:var(--ink); margin-bottom:10px; }
.benefit-card p{ color:var(--mute); font-size:14.5px; margin-bottom:16px; }

/* ---------- Analytics ---------- */
.metrics{ background:var(--ink); color:#fff; }
.metric-grid{ display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.metric-card{ background:var(--ink-2); border:1px solid var(--line); border-radius:8px; padding:22px; }
.metric-card .k{ display:block; font-family:var(--font-mono); font-size:11px; letter-spacing:.1em; color:var(--signal); margin-bottom:10px; }
.metric-card p{ font-size:13.5px; color:var(--ink-mute); }

/* ---------- Enterprise deployment: process list ---------- */
.process{ max-width:820px; }
.process-step{ display:grid; grid-template-columns:48px 1fr; gap:20px; padding:22px 0; border-top:1px solid var(--line-light); }
.process-step:first-child{ border-top:none; }
.step-num{ font-family:var(--font-mono); font-size:13px; color:var(--amber-on-light); font-weight:600; }
.process-step h3{ font-size:15.5px; margin-bottom:6px; color:var(--ink); }
.process-step p{ font-size:14px; color:var(--mute); }
.process-note{ max-width:760px; color:var(--mute); font-size:14.5px; margin-top:28px; padding-top:24px; border-top:1px solid var(--line-light); }

/* ---------- Two-column split (Why GPS fails, Security, Business model) ---------- */
.split{ display:flex; gap:48px; align-items:flex-start; }
.split .col{ flex:1; }
.split h2{ font-size:30px; margin-bottom:18px; letter-spacing:-.01em; color:var(--ink); }
.split p{ color:var(--mute); font-size:15px; margin-bottom:15px; }
.split .highlight{ background:var(--paper-2); border-left:2px solid var(--amber); padding:20px 24px; border-radius:0 8px 8px 0; font-size:14px; color:var(--ink); }

/* ---------- FAQ ---------- */
.faq-list{ max-width:820px; border-bottom:1px solid var(--line-light); }
.faq-item{ border-top:1px solid var(--line-light); padding:18px 0; }
.faq-item summary{ cursor:pointer; font-weight:700; font-size:15.5px; color:var(--ink); list-style:none; display:flex; justify-content:space-between; align-items:center; gap:16px; }
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{ content:"+"; font-family:var(--font-mono); color:var(--amber-on-light); font-size:20px; flex-shrink:0; }
.faq-item[open] summary::after{ content:"–"; }
.faq-item .faq-a{ padding-top:12px; font-size:14.5px; color:var(--mute); max-width:660px; }

/* ---------- Company ---------- */
.about{ background:var(--ink); color:#fff; }
.about .wrap{ display:flex; gap:52px; align-items:center; flex-wrap:wrap; }
.about-photo{ width:104px; height:104px; border-radius:8px; border:1px solid var(--line); background:var(--ink-2); flex-shrink:0; display:flex; align-items:center; justify-content:center; font-family:var(--font-mono); font-size:30px; font-weight:600; color:var(--signal); }
.about-text{ flex:1; min-width:280px; }
.about-text h2{ font-size:27px; margin-bottom:8px; }
.about-text .role{ font-family:var(--font-mono); color:var(--amber); font-size:11.5px; font-weight:500; letter-spacing:.1em; margin-bottom:18px; }
.about-text p{ color:var(--ink-mute); font-size:15px; max-width:560px; }

/* ---------- Contact ---------- */
.contact{ text-align:center; }
.contact h2{ font-size:32px; margin-bottom:14px; letter-spacing:-.01em; }
.contact > .wrap > p{ color:var(--mute); font-size:15.5px; margin-bottom:40px; }
.cta-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-bottom:44px; text-align:left; }
.cta-card{ background:var(--paper-2); border:1px solid var(--line-light); border-radius:8px; padding:22px; }
.cta-card h3{ font-family:var(--font-body); font-size:16px; margin-bottom:8px; color:var(--ink); }
.cta-card p{ font-size:13.5px; color:var(--mute); margin-bottom:16px; }
.cta-card a.cta-link{ font-family:var(--font-mono); font-size:12.5px; font-weight:600; color:var(--ink); border-bottom:1px solid var(--ink); padding-bottom:2px; }
.cta-card a.cta-link:hover{ opacity:.6; }
.contact-note{ font-size:13px; color:var(--mute); margin-bottom:14px; }
.contact-links{ display:flex; flex-direction:column; align-items:center; gap:10px; }
.contact a.email{ font-family:var(--font-mono); font-size:17px; font-weight:500; color:var(--ink); border-bottom:1px solid var(--line-light); padding-bottom:2px; }
.contact a.phone{ font-family:var(--font-mono); font-size:13.5px; color:var(--mute); }
.contact a.email:hover, .contact a.phone:hover{ color:var(--signal-on-light); }

/* ---------- Footer ---------- */
footer.site-footer{ background:var(--ink); color:var(--ink-mute); padding:44px 0 26px; border-top:1px solid var(--line); }
footer.site-footer .wrap{ display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:16px; }
.footer-brand{ display:flex; align-items:center; gap:10px; font-family:var(--font-mono); font-weight:600; color:#fff; font-size:14px; }
.footer-brand img{ width:26px; height:26px; }
.footer-brand b{ color:var(--signal); }
footer.site-footer nav{ display:flex; gap:20px; flex-wrap:wrap; }
footer.site-footer nav a{ font-family:var(--font-mono); font-size:12px; color:var(--ink-mute); transition:color .2s var(--ease); }
footer.site-footer nav a:hover{ color:#fff; }
footer.site-footer .copy{ width:100%; text-align:center; font-family:var(--font-mono); font-size:11px; color:#525A72; margin-top:26px; padding-top:20px; border-top:1px solid var(--line); }

/* ---------- Back to top ---------- */
.to-top{ position:fixed; right:22px; bottom:22px; width:40px; height:40px; border-radius:6px; background:var(--ink); color:var(--signal); border:1px solid var(--line); display:flex; align-items:center; justify-content:center; box-shadow:var(--shadow-md); opacity:0; pointer-events:none; transform:translateY(10px); transition:opacity .25s var(--ease), transform .25s var(--ease); z-index:40; font-family:var(--font-mono); }
.to-top.visible{ opacity:1; pointer-events:auto; transform:translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 900px){
  .nav-toggle{ display:block; }
  nav.links{
    position:absolute; top:100%; left:0; right:0; background:var(--ink); flex-direction:column;
    align-items:flex-start; padding:18px 24px 22px; gap:16px; border-top:1px solid var(--line);
    transform:translateY(-8px); opacity:0; pointer-events:none; transition:opacity .2s var(--ease), transform .2s var(--ease);
  }
  nav.links.open{ transform:translateY(0); opacity:1; pointer-events:auto; }
  nav.links a.nav-cta{ margin-top:4px; }
}

@media (max-width: 860px){
  .hero-grid{ grid-template-columns:1fr; gap:36px; padding-bottom:48px; }
  .hero h1{ font-size:36px; }
  .product-row, .product-row.reverse{ grid-template-columns:1fr; gap:28px; }
  .product-row.reverse .product-copy, .product-row.reverse .product-visual{ order:initial; }
  .fusion-row{ grid-template-columns:1fr; gap:8px; }
  .card-grid{ grid-template-columns:1fr; }
  .benefit-grid{ grid-template-columns:1fr; gap:36px; }
  .metric-grid{ grid-template-columns:1fr; }
  .cta-grid{ grid-template-columns:1fr; }
}

@media (max-width: 760px){
  section{ padding:72px 0; }
  .split{ flex-direction:column; }
  .about .wrap{ flex-direction:column; text-align:center; }
  footer.site-footer .wrap{ flex-direction:column; text-align:center; }
}