/* SignalFlow landing · v1.0 · Manrope, light base, teal accent */
:root{
  --bg:#FFFFFF; --bg-alt:#F6F8FB; --ink:#0F172A; --muted:#5B6472; --line:#E3E8EF;
  --acc:#0E9C8F; --acc-2:#14B8A6; --acc-soft:#E6FBF8; --pearl-1:#EEF0FF; --pearl-2:#E6FBF8;
  --noise:#CBD2DB; --radius:12px; --wrap:1120px;
  --shadow:0 20px 50px -30px rgba(15,23,42,.25);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Manrope",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
img,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;line-height:1.15;letter-spacing:-.02em;text-wrap:balance}
h1{font-size:clamp(34px,4.6vw,54px);font-weight:800}
h2{font-size:clamp(26px,3.2vw,38px);font-weight:800}
h3{font-size:19px;font-weight:700}
p{margin:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.wrap.narrow{max-width:760px}
.lead{font-size:19px;color:var(--muted);max-width:60ch}
.muted{color:var(--muted)}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--acc);margin-bottom:16px}
.section{padding:88px 0}
.section.alt{background:var(--bg-alt)}
.sec-head{margin-bottom:40px;display:flex;flex-direction:column;gap:14px}
.sec-head .lead{margin-top:4px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 22px;border-radius:10px;font-weight:700;font-size:16px;border:1px solid transparent;cursor:pointer;transition:background .2s,color .2s,border-color .2s,transform .15s;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--acc);color:#fff}
.btn-primary:hover{background:#0B8579}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--acc);color:var(--acc)}
.btn-sm{padding:10px 16px;font-size:14px}
.btn-lg{padding:16px 28px;font-size:17px}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(20,184,166,.45);outline-offset:2px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:28px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.02em}
.logo-img{height:30px;width:auto}
.nav{display:flex;gap:26px;margin-left:auto;font-size:15px;font-weight:600;color:var(--muted)}
.nav a:hover{color:var(--ink)}
.burger{display:none;margin-left:auto;background:none;border:0;width:40px;height:40px;padding:8px;cursor:pointer}
.burger span{display:block;height:2px;background:var(--ink);margin:6px 0;transition:transform .2s,opacity .2s}
.mobile-nav{display:none;flex-direction:column;gap:6px;padding:12px 24px 20px;border-top:1px solid var(--line);background:#fff}
.mobile-nav a{padding:10px 0;font-weight:600}
.mobile-nav .btn{margin-top:8px}
.site-header.open .mobile-nav{display:flex}
.site-header.open .burger span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.site-header.open .burger span:nth-child(2){opacity:0}
.site-header.open .burger span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* hero */
.hero{padding:72px 0 80px;background:linear-gradient(180deg,var(--pearl-1) 0%,var(--pearl-2) 55%,#fff 100%)}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero .lead{margin-top:20px;color:var(--ink);opacity:.8}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.hero-visual .caption{margin-top:12px;font-size:13px;color:var(--muted);text-align:center}
.device{position:relative;border-radius:16px;overflow:hidden;background:#0B1220;box-shadow:var(--shadow);aspect-ratio:16/10}
.device .teaser{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:none}
.device.has-video .teaser{display:block}
.device.has-video .panel-mock{display:none}

/* panel mock (placeholder until teaser video is ready) */
.panel-mock{position:absolute;inset:0;display:grid;grid-template-columns:132px 1fr;font-size:11px;color:#C7D0DC}
.pm-side{background:#0F172A;border-right:1px solid #1E293B;padding:14px 10px;display:flex;flex-direction:column;gap:10px}
.pm-logo{width:26px;height:26px;border-radius:7px;background:var(--acc-2);margin-bottom:8px}
.pm-side b{font-weight:600;padding:6px 8px;border-radius:6px;color:#94A3B8}
.pm-side b.on{background:#1E293B;color:#fff}
.pm-main{padding:14px 16px;background:#0B1220}
.pm-top{display:flex;align-items:center;gap:10px;margin-bottom:12px;color:#fff;font-weight:700;font-size:13px}
.pm-pill{margin-left:auto;font-weight:500;font-size:10px;color:#94A3B8;border:1px solid #1E293B;border-radius:6px;padding:3px 8px}
.pm-run{font-size:10px;font-weight:700;color:#0B1220;background:var(--acc-2);border-radius:6px;padding:4px 9px}
.pm-card{background:#111A2E;border:1px solid #1E293B;border-radius:8px;padding:10px 12px;display:flex;flex-direction:column;gap:8px}
.pm-row label{display:block;font-size:9px;color:#94A3B8;margin-bottom:3px}
.pm-row.two{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.pm-input{background:#0B1220;border:1px solid #243049;border-radius:5px;padding:5px 8px;color:#E2E8F0;font-size:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pm-list{margin-top:10px;display:flex;flex-direction:column;gap:6px}
.pm-li{display:flex;align-items:center;gap:10px;background:#111A2E;border:1px solid #1E293B;border-radius:7px;padding:7px 10px;color:#E2E8F0}
.pm-li span{color:#64748B;width:12px}
.pm-li em{font-style:normal;font-weight:600;flex:1}
.pm-li i{font-style:normal;font-size:9px;padding:2px 7px;border-radius:5px;background:#0F2D2A;color:#5EEAD4}

/* columns */
.cols3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.cols2{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.col h3{margin-bottom:10px}
.col p{color:var(--muted)}
.col ul{margin:0;padding-left:18px;color:var(--muted)}
.col li{margin-bottom:8px}
.conclusion{margin-top:44px;padding:22px 26px;border-left:4px solid var(--acc);background:var(--acc-soft);font-weight:600;font-size:19px;max-width:62ch}

/* steps */
.steps{list-style:none;margin:0 0 36px;padding:0;display:grid;grid-template-columns:repeat(7,1fr);gap:10px;counter-reset:s}
.steps li{position:relative;background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 12px 12px;font-size:14px;font-weight:600;line-height:1.35}
.steps li span{display:inline-block;width:22px;height:22px;border-radius:50%;background:var(--acc);color:#fff;font-size:12px;font-weight:800;text-align:center;line-height:22px;margin-bottom:8px}
.steps li::after{content:"";position:absolute;right:-8px;top:50%;width:6px;height:6px;border-top:2px solid var(--noise);border-right:2px solid var(--noise);transform:translateY(-50%) rotate(45deg)}
.steps li:last-child::after{display:none}

/* flow animation */
.flow{display:grid;grid-template-columns:1fr 120px 1fr;gap:20px;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}
.flow-label{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.flow-lines{display:flex;flex-direction:column;gap:7px}
.flow-lines i{display:block;height:9px;border-radius:5px;background:var(--noise);opacity:.55;transform-origin:left;transition:opacity .6s,background .6s,transform .6s}
.flow-lines i:nth-child(3n){width:78%}.flow-lines i:nth-child(3n+1){width:92%}.flow-lines i:nth-child(3n+2){width:64%}
.flow.on .flow-lines i{opacity:.28}
.flow.on .flow-lines i.keep{opacity:1;background:var(--acc-2);transform:scaleX(1.03)}
.flow-filter{display:flex;align-items:center;justify-content:center}
.flow-filter-body{width:100%;min-height:150px;border-radius:60px;background:linear-gradient(180deg,var(--acc-soft),var(--acc));position:relative;display:flex;align-items:center;justify-content:center}
.flow-filter-body span{font-size:11px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:#fff;transform:rotate(-90deg)}
.flow-out{display:flex;flex-direction:column;gap:10px}
.hit{border:1px solid var(--acc-soft);background:linear-gradient(180deg,#fff,#F3FBF8);border-radius:10px;padding:12px 14px;opacity:0;transform:translateX(12px);transition:opacity .5s,transform .5s}
.flow.on .hit{opacity:1;transform:none}
.flow.on .hit:nth-child(2){transition-delay:.15s}.flow.on .hit:nth-child(3){transition-delay:.3s}.flow.on .hit:nth-child(4){transition-delay:.45s}
.hit b{display:block;font-size:14px;line-height:1.35}
.hit small{color:var(--muted);font-size:12px}
.how-text{margin-top:30px;max-width:76ch;color:var(--muted)}
.integrations{margin-top:16px;font-size:14px;color:var(--ink)}
.integrations span{font-weight:700;color:var(--muted)}
.integrations .sep{margin:0 10px;color:var(--noise)}

/* product */
.video-frame{border-radius:16px;overflow:hidden;background:#0B1220;box-shadow:var(--shadow);aspect-ratio:16/9;margin-bottom:40px}
.video-frame video{width:100%;height:100%;object-fit:cover}
.states{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.state{margin:0}
.state figcaption{margin-top:14px}
.state figcaption b{display:block;font-size:16px;margin-bottom:4px}
.state figcaption span{color:var(--muted);font-size:15px}
.shot{aspect-ratio:4/3;border-radius:12px;background:#0B1220;color:#E2E8F0;padding:16px;font-size:11px;overflow:hidden;box-shadow:var(--shadow)}
.s-title{font-weight:700;font-size:13px;color:#fff;margin-bottom:12px}
.s-field{margin-bottom:9px}
.s-field label{display:block;font-size:9px;color:#94A3B8;margin-bottom:3px}
.s-field div{background:#111A2E;border:1px solid #243049;border-radius:5px;padding:6px 8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.s-btn{margin-top:6px;background:var(--acc-2);color:#0B1220;font-weight:800;text-align:center;border-radius:6px;padding:7px}
.s-period{display:flex;gap:8px;margin-bottom:12px}
.s-period span{flex:1;background:#111A2E;border:1px solid #243049;border-radius:5px;padding:6px 8px;color:#fff}
.s-src{display:flex;align-items:center;gap:8px;background:#111A2E;border:1px solid #1E293B;border-radius:7px;padding:7px 10px;margin-bottom:6px;color:#fff;font-weight:600}
.s-src i{width:18px;height:18px;border-radius:50%;background:#1E3A8A;display:inline-block}
.s-src em{margin-left:auto;font-style:normal;font-size:9px;padding:2px 7px;border-radius:5px;background:#0F2D2A;color:#5EEAD4;font-weight:600}
.shot-tg{background:#E7EFE3;color:#1c2430;padding:0;display:flex;flex-direction:column}
.tg-head{display:flex;align-items:center;gap:10px;padding:10px 12px;background:#fff;border-bottom:1px solid #d9e2d4}
.tg-head i{width:28px;height:28px;border-radius:50%;background:var(--acc);color:#fff;font-style:normal;font-weight:800;display:flex;align-items:center;justify-content:center}
.tg-head b{display:block;font-size:12px}.tg-head small{font-size:10px;color:#6b7a6b}
.tg-msg{margin:10px;background:#fff;border-radius:10px;padding:10px 12px;font-size:10.5px;line-height:1.45;overflow:hidden}
.tg-msg p{margin:0 0 8px}

/* tiers */
.tiers{margin:0;display:flex;flex-direction:column;gap:12px;max-width:820px}
.tier{display:grid;grid-template-columns:200px 1fr;gap:18px;align-items:baseline;padding:16px 20px;border:1px solid var(--line);border-radius:10px;background:#fff}
.tier dt{font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.tier dd{margin:0;font-weight:600;font-size:17px}
.tier.focus{border-color:var(--acc);background:linear-gradient(90deg,var(--acc-soft),#fff)}
.tier.focus dt{color:var(--acc)}

/* beta */
.beta{background:linear-gradient(180deg,#fff,var(--pearl-1) 60%,var(--pearl-2))}
.beta .col{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 24px}

/* form */
.form-wrap{max-width:760px}
.form{background:#fff;border:1px solid var(--line);border-radius:14px;padding:32px;display:flex;flex-direction:column;gap:20px}
.field label,.field .label{display:block;font-weight:600;font-size:15px;margin-bottom:8px}
.field label b,.field .label b{color:var(--acc);font-weight:700}
.field input[type=text],.field textarea{width:100%;font:inherit;font-size:16px;padding:12px 14px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--ink);transition:border-color .2s}
.field input:focus,.field textarea:focus{border-color:var(--acc);outline:none;box-shadow:0 0 0 3px rgba(20,184,166,.2)}
.field textarea{resize:vertical;min-height:88px}
.field.invalid input,.field.invalid textarea{border-color:#C2410C}
.choices{display:flex;flex-wrap:wrap;gap:8px}
.choices label{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border:1px solid var(--line);border-radius:9px;cursor:pointer;font-size:15px}
.choices input{accent-color:var(--acc)}
.choices label:has(input:checked){border-color:var(--acc);background:var(--acc-soft)}
.more{border-top:1px solid var(--line);padding-top:16px}
.more summary{cursor:pointer;font-weight:700;color:var(--acc);list-style:none;display:inline-flex;align-items:center;gap:8px}
.more summary::before{content:"+";display:inline-block;width:20px;height:20px;border:1px solid var(--acc);border-radius:50%;text-align:center;line-height:18px;font-size:14px}
.more[open] summary::before{content:"–"}
.more .field{margin-top:18px}
.hp{position:absolute;left:-9999px;top:-9999px;height:0;overflow:hidden}
.form-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.fine{font-size:13px;color:var(--muted)}
.form-msg{font-size:14px;color:#C2410C;min-height:1em}
.form-success{background:#fff;border:1px solid var(--acc);border-radius:14px;padding:40px;text-align:center}
.form-success .check{width:56px;height:56px;border-radius:50%;background:var(--acc);margin:0 auto 18px;position:relative}
.form-success .check::after{content:"";position:absolute;left:20px;top:14px;width:12px;height:22px;border-right:4px solid #fff;border-bottom:4px solid #fff;transform:rotate(45deg)}
.form-success h3{font-size:24px;margin-bottom:8px}
.form-success p{color:var(--muted)}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:40px 0}
.footer-inner{display:grid;grid-template-columns:1.2fr 1fr auto;gap:24px;align-items:start;font-size:14px}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-links a:hover{color:var(--acc)}
.copy{align-self:end}

/* reveal */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.12s}.reveal.d2{transition-delay:.24s}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.hit{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}
.no-anim .reveal{opacity:1;transform:none;transition:none}
.no-anim .hit{opacity:1;transform:none;transition:none}
.no-anim .flow-lines i{transition:none}

/* responsive */
@media (max-width:1000px){
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .cols3{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(4,1fr)}
  .steps li::after{display:none}
  .states{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
}
@media (max-width:760px){
  body{font-size:16px}
  .section{padding:64px 0}
  .hero{padding:44px 0 56px}
  .nav,.header-inner > .btn{display:none}
  .burger{display:block}
  .cols2{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .flow{grid-template-columns:1fr;gap:16px}
  .flow-filter-body{min-height:56px;border-radius:28px}
  .flow-filter-body span{transform:none}
  .tier{grid-template-columns:1fr;gap:6px}
  .form{padding:22px}
  .lead{font-size:17px}
}