/* Quantulus marketing + docs — shared layout on Signal tokens */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ground);color:var(--fg-1);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
section{position:relative}

/* ---------- eyebrow / headings ---------- */
.eyebrow{font-size:12px;font-weight:600;letter-spacing:var(--tracking-caps);text-transform:uppercase;color:var(--accent);margin:0 0 14px}
h1,h2,h3{margin:0;letter-spacing:var(--tracking-title);text-wrap:balance}
.lead{color:var(--fg-2);font-size:18px;line-height:1.55;text-wrap:pretty}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--ground) 82%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--separator)}
.nav-in{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:-.02em;color:var(--fg-1)}
.brand svg{flex:none}
.nav-links{margin-left:auto;display:flex;align-items:center;gap:8px}
.nav-links a{color:var(--fg-2);font-size:15px;font-weight:500;padding:8px 12px;border-radius:8px;transition:color .15s,background .15s}
.nav-links a:hover{color:var(--fg-1);background:var(--fill-quiet)}
.nav-cta{display:flex}
.nav-burger{display:none;margin-left:auto;background:var(--elevated);border:1px solid var(--border-strong);color:var(--fg-1);width:40px;height:40px;border-radius:10px;cursor:pointer;align-items:center;justify-content:center}

/* ---------- App Store button ---------- */
.appstore{display:inline-flex;align-items:center;gap:11px;background:#fff;color:#000;border-radius:12px;padding:10px 18px 10px 16px;text-decoration:none;transition:transform .12s var(--ease),box-shadow .15s}
.appstore:hover{color:#000;transform:translateY(-1px);box-shadow:0 8px 24px rgba(0,0,0,.5)}
.appstore svg{flex:none}
.appstore .as-t{display:flex;flex-direction:column;line-height:1.1;text-align:left}
.appstore .as-t small{font-size:10px;font-weight:500;letter-spacing:.02em}
.appstore .as-t strong{font-size:17px;font-weight:600;letter-spacing:-.01em}
.appstore.dark{background:var(--elevated);color:var(--fg-1);border:1px solid var(--border-strong)}
.appstore.dark:hover{color:var(--fg-1);background:var(--elevated-hover)}

/* ---------- hero ---------- */
.hero{padding:72px 0 96px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(38px,6vw,60px);font-weight:700;line-height:1.02;letter-spacing:-.035em}
.hero h1 .accent{color:var(--accent)}
.hero .lead{margin:22px 0 30px;max-width:520px;font-size:19px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-meta{display:flex;gap:22px;margin-top:30px;flex-wrap:wrap}
.hero-meta .m{display:flex;flex-direction:column;gap:2px}
.hero-meta .m b{font-family:var(--font-mono);font-size:22px;font-weight:600;color:var(--fg-1)}
.hero-meta .m span{font-size:13px;color:var(--fg-2)}
.hero-glow{position:absolute;width:620px;height:620px;top:-140px;right:-160px;background:radial-gradient(circle,var(--accent-glow),transparent 62%);filter:blur(20px);pointer-events:none;z-index:0}

/* ---------- phone frame ---------- */
.phone{position:relative;width:300px;max-width:100%;margin:0 auto;border-radius:46px;background:#0c0c0e;border:1px solid var(--border-strong);padding:11px;box-shadow:0 40px 80px -20px rgba(0,0,0,.7),0 0 0 1px rgba(255,255,255,.03)}
.phone::before{content:"";position:absolute;top:14px;left:50%;transform:translateX(-50%);width:98px;height:26px;background:#000;border-radius:999px;z-index:3}
.phone .screen{position:relative;border-radius:36px;overflow:hidden;background:#000;aspect-ratio:1242/2688}
.phone .screen img{width:100%;height:100%;object-fit:cover;object-position:top}
.phone-float{position:relative}
.phone-tag{position:absolute;z-index:4;background:var(--elevated);border:1px solid var(--border-strong);border-radius:12px;padding:10px 13px;display:flex;align-items:center;gap:9px;box-shadow:var(--shadow-pop);font-size:13px;font-weight:600}
.phone-tag .dot{width:8px;height:8px;border-radius:50%;background:var(--pos)}

/* animated progress overlay */
.progress-overlay{position:absolute;top:28.55%;left:9.2%;width:32%;height:0.4%;background:#FF6A1A;border-radius:2px;z-index:10;overflow:hidden;box-shadow:0 1px 4px rgba(255,106,26,0.5)}
.progress-overlay::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.7) 50%,transparent 100%);animation:strobe 1.8s linear infinite}
@keyframes strobe{0%{transform:translateX(-100%)}100%{transform:translateX(100%)}}

/* live clock overlay */
.clock-overlay{position:absolute;top:1.8%;left:12.5%;z-index:100;color:#fff;font-size:65%;font-weight:600;font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,sans-serif;letter-spacing:-0.01em;text-shadow:0 1px 2px rgba(0,0,0,0.3)}
.clock-bg{position:absolute;top:1.6%;left:9%;width:14%;height:2.8%;background:#000;z-index:99}

/* ---------- section shell ---------- */
.band{padding:88px 0}
.band-head{max-width:620px;margin-bottom:52px}
.band-head h2{font-size:clamp(28px,4.4vw,42px);font-weight:700;letter-spacing:-.03em;line-height:1.05}
.band-head .lead{margin-top:16px}

/* ---------- feature grid (overview) ---------- */
.fgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.fcard{background:var(--elevated);border:1px solid var(--border);border-radius:16px;padding:24px;transition:border-color .15s,transform .15s}
.fcard:hover{border-color:var(--border-hover);transform:translateY(-2px)}
.fic{width:42px;height:42px;border-radius:11px;background:var(--accent-soft);border:1px solid var(--accent-soft-border);display:flex;align-items:center;justify-content:center;color:var(--accent);margin-bottom:16px}
.fcard h3{font-size:18px;font-weight:600;letter-spacing:-.01em;margin-bottom:8px}
.fcard p{margin:0;color:var(--fg-2);font-size:14px;line-height:1.5}

/* ---------- alternating deep-dive rows ---------- */
.rows{display:flex;flex-direction:column;gap:96px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.row.flip .row-media{order:2}
.row-copy .eyebrow{margin-bottom:12px}
.row-copy h3{font-size:clamp(24px,3.2vw,32px);font-weight:700;letter-spacing:-.02em;line-height:1.1}
.row-copy .lead{margin-top:14px;font-size:17px}
.row-list{list-style:none;padding:0;margin:22px 0 0;display:flex;flex-direction:column;gap:12px}
.row-list li{display:flex;gap:11px;align-items:flex-start;color:var(--fg-2);font-size:15px;line-height:1.45}
.row-list li svg{flex:none;color:var(--accent);margin-top:2px}

/* framed bare screenshot */
.shot{position:relative;border-radius:24px;overflow:hidden;border:1px solid var(--border-strong);background:#000;box-shadow:0 30px 70px -30px rgba(0,0,0,.8)}
.shot::after{content:"";position:absolute;inset:0;border-radius:24px;box-shadow:inset 0 0 0 1px rgba(255,255,255,.04);pointer-events:none}
.shot.crop-top img{aspect-ratio:1242/1500;object-fit:cover;object-position:top}
.shot-glow{position:absolute;inset:-40px;background:radial-gradient(circle at 50% 40%,var(--accent-glow),transparent 60%);filter:blur(30px);z-index:-1}
.media-hold{position:relative;max-width:360px;margin:0 auto}

/* ---------- setup teaser ---------- */
.setup{background:var(--surface);border:1px solid var(--border);border-radius:24px;padding:48px;display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center}
.steps{display:flex;flex-direction:column;gap:14px}
.step{display:flex;gap:14px;align-items:flex-start}
.step .n{flex:none;width:30px;height:30px;border-radius:999px;background:var(--accent-soft);border:1px solid var(--accent-soft-border);color:var(--accent);font-family:var(--font-mono);font-weight:600;font-size:14px;display:flex;align-items:center;justify-content:center}
.step .st b{display:block;font-size:15px;font-weight:600;color:var(--fg-1);margin-bottom:2px}
.step .st span{font-size:14px;color:var(--fg-2);line-height:1.45}

/* ---------- final CTA ---------- */
.cta{text-align:center;padding:110px 0}
.cta h2{font-size:clamp(30px,5vw,52px);font-weight:700;letter-spacing:-.03em;line-height:1.03}
.cta .lead{max-width:520px;margin:20px auto 32px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;align-items:center}
.cta-glow{position:absolute;left:50%;top:40%;transform:translate(-50%,-50%);width:700px;height:400px;max-width:100%;background:radial-gradient(ellipse,var(--accent-glow),transparent 65%);filter:blur(30px);pointer-events:none}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--separator);padding:48px 0 40px}
.footer-in{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}
.footer .brand{margin-bottom:14px}
.footer p{color:var(--fg-2);font-size:14px;max-width:340px;line-height:1.5;margin:0}
.footer .cols{display:flex;gap:56px;flex-wrap:wrap}
.footer .col h4{font-size:12px;text-transform:uppercase;letter-spacing:var(--tracking-caps);color:var(--fg-3);margin:0 0 14px}
.footer .col a{display:block;color:var(--fg-2);font-size:14px;padding:5px 0;transition:color .15s}
.footer .col a:hover{color:var(--fg-1)}
.footer .fine{margin-top:36px;padding-top:24px;border-top:1px solid var(--separator);color:var(--fg-3);font-size:13px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* ---------- docs page ---------- */
.doc-hero{padding:64px 0 40px}
.doc-hero h1{font-size:clamp(34px,5vw,52px);font-weight:700;letter-spacing:-.035em;line-height:1.03}
.doc-hero .lead{margin-top:18px;max-width:600px}
.doc-body{display:grid;grid-template-columns:230px 1fr;gap:56px;padding-bottom:100px;align-items:start}
.toc{position:sticky;top:88px;display:flex;flex-direction:column;gap:4px}
.toc .toc-t{font-size:12px;text-transform:uppercase;letter-spacing:var(--tracking-caps);color:var(--fg-3);margin-bottom:8px}
.toc a{color:var(--fg-2);font-size:14px;padding:7px 12px;border-radius:8px;border-left:2px solid transparent;transition:color .15s,background .15s}
.toc a:hover{color:var(--fg-1);background:var(--fill-quiet)}
.toc a.on{color:var(--accent);border-left-color:var(--accent)}
.doc-main{max-width:760px;min-width:0}
.doc-step{padding:36px 0;border-top:1px solid var(--separator)}
.doc-step:first-child{border-top:none;padding-top:0}
.doc-step>.stnum{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px}
.doc-step .stnum .b{width:30px;height:30px;border-radius:999px;background:var(--accent);color:var(--ground);font-family:var(--font-mono);font-weight:700;font-size:15px;display:flex;align-items:center;justify-content:center}
.doc-step .stnum span{font-size:12px;text-transform:uppercase;letter-spacing:var(--tracking-caps);color:var(--fg-3)}
.doc-step h2{font-size:clamp(23px,3.2vw,30px);font-weight:700;letter-spacing:-.02em;line-height:1.1;margin-bottom:14px}
.doc-main p{color:var(--fg-2);font-size:16px;line-height:1.65;margin:0 0 16px;text-wrap:pretty}
.doc-main p strong{color:var(--fg-1);font-weight:600}
.doc-main a{color:var(--accent);text-decoration:underline;text-decoration-color:var(--accent-soft-border);text-underline-offset:3px}
.doc-main a:hover{color:var(--accent-hover)}
.doc-main ol,.doc-main ul{color:var(--fg-2);font-size:16px;line-height:1.6;padding-left:22px;margin:0 0 16px}
.doc-main li{margin-bottom:9px}
.doc-main li::marker{color:var(--accent)}
.note{display:flex;gap:13px;background:var(--accent-soft);border:1px solid var(--accent-soft-border);border-radius:12px;padding:16px 18px;margin:20px 0;align-items:flex-start}
.note svg{flex:none;color:var(--accent);margin-top:1px}
.note p{margin:0;color:var(--fg-1);font-size:14px;line-height:1.55}
.note.plain{background:var(--surface);border-color:var(--border)}
.note.plain svg{color:var(--fg-2)}
.cmd{background:#08080a;border:1px solid var(--border);border-radius:12px;padding:16px 18px;margin:18px 0;font-family:var(--font-mono);font-size:14px;color:var(--fg-1);overflow-x:auto}
.cmd .prompt{color:var(--accent);user-select:none}
.cmd .cmt{color:var(--fg-3)}
.cmd .ln{white-space:pre;display:block}
.credgrid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0}
.done-feat{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:8px}
.done-card{background:var(--elevated);border:1px solid var(--border);border-radius:14px;padding:18px}
.done-card .ic{width:36px;height:36px;border-radius:10px;background:var(--accent-soft);border:1px solid var(--accent-soft-border);color:var(--accent);display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.done-card b{display:block;font-size:15px;font-weight:600;margin-bottom:5px}
.done-card p{margin:0;font-size:14px;line-height:1.5}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-media{order:-1}
  .fgrid{grid-template-columns:repeat(2,1fr)}
  .row,.row.flip .row-media{grid-template-columns:1fr;order:0;gap:32px}
  .row .row-media{order:-1}
  .setup{grid-template-columns:1fr;padding:36px 28px}
  .doc-body{grid-template-columns:1fr;gap:8px}
  .toc{position:relative;top:0;flex-direction:row;flex-wrap:wrap;gap:6px;padding-bottom:24px;border-bottom:1px solid var(--separator);margin-bottom:8px}
  .toc .toc-t{display:none}
  .toc a{border-left:none;background:var(--fill-quiet)}
  .toc a.on{background:var(--accent-soft)}
  .nav-links.desktop{display:none}
  .nav-cta.desktop{display:none}
  .nav-burger{display:flex}
}
@media(max-width:560px){
  .wrap{padding:0 18px}
  .fgrid{grid-template-columns:1fr}
  .hero{padding:44px 0 64px}
  .band{padding:60px 0}
  .rows{gap:64px}
  .cta{padding:72px 0}
  .credgrid,.done-feat{grid-template-columns:1fr}
  .hero-meta{gap:16px}
}
/* mobile menu */
.mobile-menu{display:none;flex-direction:column;gap:2px;padding:8px 0 16px;border-top:1px solid var(--separator)}
.mobile-menu.open{display:flex}
.mobile-menu a{color:var(--fg-1);font-size:16px;padding:12px 4px}
.mobile-menu .appstore{margin-top:10px;align-self:flex-start;color:#000!important}
.mobile-menu .appstore.dark{color:var(--fg-1)!important}