/* SignalDart — early access landing. Plain CSS, no build step. */

:root{
  --bg:#fafbfd; --ink:#0b1220; --sub:#5b6472; --muted:#8a93a3;
  --line:#e8ebf1; --card:#fff;
  --orange:#ff7a1a; --orange-d:#ff6b00; --orange-l:#ffb347;
  --dark:#0b1120; --green:#16a34a;
  --max:1180px; --r:16px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  letter-spacing:-.011em; -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}
.container.narrow{max-width:800px}
.grad{
  background:linear-gradient(103deg,var(--orange-d) 0%,#ff8a2b 48%,var(--orange-l) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.accent{color:var(--orange-d)}

/* ---------- nav ---------- */
.nav{position:fixed;inset:0 0 auto 0;z-index:60;display:flex;justify-content:center;padding:12px 16px}
.nav-inner{
  display:flex;align-items:center;gap:16px;width:100%;max-width:var(--max);
  padding:10px 14px;border-radius:16px;border:1px solid transparent;transition:.28s;
}
.nav.stuck .nav-inner{
  background:rgba(255,255,255,.97);
  backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);
  border-color:var(--line);box-shadow:0 10px 30px -16px rgba(15,23,42,.28);
}
.brand{display:flex;align-items:center;gap:10px}
.wordmark{font-size:21px;font-weight:800;letter-spacing:-.02em}
.wordmark.small{font-size:19px}
.nav-links{display:flex;gap:4px;margin-left:12px}
.nav-links a{padding:8px 12px;border-radius:9px;font-size:14px;font-weight:500;color:var(--sub);transition:.2s}
.nav-links a:hover{background:#f4f6fa;color:var(--ink)}
.nav-inner .btn{margin-left:auto}
@media(max-width:820px){.nav-links{display:none}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;cursor:pointer;
  border:0;border-radius:11px;font-family:inherit;font-size:15px;font-weight:600;
  padding:13px 22px;transition:transform .18s,box-shadow .18s,opacity .18s;white-space:nowrap;
}
.btn-sm{font-size:14px;padding:10px 16px;border-radius:10px}
.btn-primary{
  background:linear-gradient(103deg,var(--orange-d),#ff922f 55%,#ffab52);
  color:#fff;box-shadow:0 14px 30px -12px rgba(255,107,0,.85);
}
.btn-primary:hover{transform:translateY(-1px)}
.btn-primary:disabled{opacity:.65;cursor:not-allowed;transform:none}
.arr{transition:transform .18s}
.btn:hover .arr{transform:translateX(3px)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:150px 0 60px;text-align:center}
.grid-bg{
  position:absolute;inset:0;z-index:-2;
  background-image:linear-gradient(to right,rgba(15,23,42,.045) 1px,transparent 1px),
                   linear-gradient(to bottom,rgba(15,23,42,.045) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(70% 55% at 50% 0%,#000,transparent);
          mask-image:radial-gradient(70% 55% at 50% 0%,#000,transparent);
}
.orb{position:absolute;border-radius:50%;filter:blur(90px);z-index:-1;pointer-events:none}
.orb-a{width:420px;height:420px;left:-120px;top:-90px;background:rgba(255,107,0,.20)}
.orb-b{width:360px;height:360px;right:-80px;top:40px;background:rgba(255,179,71,.22)}
.hero-inner{max-width:840px}

.badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:999px;
  border:1px solid #ffd9b8;background:rgba(255,244,234,.85);
  font-size:12px;font-weight:700;letter-spacing:.13em;text-transform:uppercase;color:#c2410c;
}
.badge.dark{border-color:rgba(255,255,255,.14);background:rgba(255,255,255,.06);color:var(--orange-l)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--orange-d);animation:pulse 1.9s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

.hero h1{margin:26px 0 0;font-size:clamp(38px,6.2vw,66px);line-height:1.04;letter-spacing:-.03em;font-weight:800}
.lede{margin:22px auto 0;max-width:620px;font-size:18px;line-height:1.65;color:var(--sub)}

/* capture form */
.capture{display:flex;gap:10px;justify-content:center;margin:32px auto 0;max-width:520px}
.capture input{
  flex:1;min-width:0;padding:14px 16px;border-radius:12px;border:1px solid #e5e8ee;
  background:#fff;font-family:inherit;font-size:15px;color:var(--ink);outline:0;transition:.2s;
}
.capture input::placeholder{color:#a0a8b5}
.capture input:focus{border-color:var(--orange);box-shadow:0 0 0 3px rgba(255,122,26,.18)}
.capture.on-dark input{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.16);color:#fff}
.capture.on-dark input::placeholder{color:#8b95a7}
.capture.invalid input{border-color:#ef4444;box-shadow:0 0 0 3px rgba(239,68,68,.15)}
.form-note{margin:12px 0 0;font-size:12.5px;color:var(--muted)}
.form-note.light{color:#8b95a7}
.form-note.error{color:#ef4444;font-weight:500}
.form-note.ok{color:var(--green);font-weight:600}
@media(max-width:560px){.capture{flex-direction:column}.capture .btn{width:100%}}

.trust{display:flex;flex-wrap:wrap;gap:8px 22px;justify-content:center;margin:26px 0 0;padding:0;list-style:none}
.trust li{display:flex;align-items:center;gap:7px;font-size:13.5px;font-weight:500;color:var(--sub)}
.tick{color:var(--green);font-weight:800}

/* ---------- dashboard preview ---------- */
.preview{
  margin-top:60px;border-radius:18px;overflow:hidden;background:#fff;
  border:1px solid #e7eaf0;box-shadow:0 40px 110px -40px rgba(15,23,42,.5);text-align:left;
}
.preview-chrome{display:flex;align-items:center;gap:7px;padding:11px 14px;background:#fbfcfe;border-bottom:1px solid var(--line)}
.c{width:10px;height:10px;border-radius:50%}
.c1{background:#ff5f57}.c2{background:#febc2e}.c3{background:#28c840}
.url{
  margin:0 auto;display:flex;align-items:center;gap:7px;padding:4px 14px;border-radius:7px;
  background:#fff;box-shadow:inset 0 0 0 1px var(--line);font-size:11px;color:var(--muted);
}
.live{width:7px;height:7px;border-radius:50%;background:rgba(22,163,74,.75)}
.preview-body{display:flex;min-height:330px}
.p-side{width:180px;flex:0 0 180px;background:var(--dark);padding:14px 10px;display:flex;flex-direction:column;gap:3px}
.p-brand{display:flex;align-items:center;gap:8px;padding:0 6px 12px;color:#fff;font-size:13px;font-weight:800}
.p-nav{padding:8px 11px;border-radius:8px;font-size:11.5px;font-weight:500;color:#8a93a3}
.p-nav.active{background:linear-gradient(103deg,var(--orange-d),#ff9a3c);color:#fff}
.p-main{flex:1;min-width:0;padding:14px;background:#f7f8fb;display:flex;flex-direction:column;gap:11px}
.p-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.p-stat{background:#fff;border:1px solid var(--line);border-radius:10px;padding:11px;display:flex;flex-direction:column;gap:3px}
.p-stat .k{font-size:10px;color:var(--muted);font-weight:500}
.p-stat .v{font-size:21px;font-weight:800;line-height:1}
.p-stat .d{font-size:10px;font-weight:700;color:var(--green)}
.p-row{display:grid;grid-template-columns:1.35fr 1fr;gap:11px}
.p-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:11px}
.p-card-h{display:flex;justify-content:space-between;font-size:11.5px;font-weight:700;margin-bottom:8px}
.p-card-h span{color:var(--orange-d);font-weight:600;font-size:10px}
.p-card-h.light{color:#fff}
.p-table{width:100%;border-collapse:collapse;font-size:11px}
.p-table td{padding:6px 0;border-top:1px solid #f0f2f6}
.p-table tr:first-child td{border-top:0}
.p-table td:nth-child(2),.p-table td:nth-child(3){text-align:right;font-weight:600}
.p-table .up{color:var(--green)}
.sw{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:7px}
.p-table em{font-style:normal;margin-left:6px;padding:1px 5px;border-radius:4px;background:#fff1e6;color:#c2410c;font-size:8.5px;font-weight:800}
.p-dark{background:linear-gradient(180deg,#3a1e08,#160b02);border-color:transparent}
.p-rec{display:flex;justify-content:space-between;align-items:center;gap:8px;background:rgba(255,255,255,.07);border-radius:7px;padding:7px 9px;margin-bottom:6px;font-size:10.5px;color:#fff}
.p-rec b{background:rgba(22,163,74,.22);color:#7fe0a6;border-radius:4px;padding:1px 6px;font-size:9.5px}
.bars{display:flex;align-items:flex-end;gap:4px;height:86px}
.bars i{flex:1;border-radius:3px 3px 0 0;background:linear-gradient(#ff6b00,#ff9a3c)}
.bars i.f{background:#ffd0a8}
@media(max-width:900px){.preview-body{flex-direction:column}.p-side{width:100%;flex:none;flex-direction:row;overflow-x:auto}.p-row{grid-template-columns:1fr}.p-stats{grid-template-columns:repeat(2,1fr)}}

/* ---------- sections ---------- */
.section{padding:90px 0}
.kicker{
  display:inline-block;padding:6px 14px;border-radius:999px;border:1px solid #ffd9b8;background:#fff4ea;
  font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#c2410c;
}
.section h2{margin:18px 0 0;font-size:clamp(30px,4.2vw,45px);line-height:1.1;letter-spacing:-.022em;font-weight:800}
.section .sub{margin:14px 0 0;max-width:600px;font-size:16.5px;line-height:1.65;color:var(--sub)}
.section > .container{text-align:center}
.section > .container > .sub{margin-left:auto;margin-right:auto}
.section .sub.left{margin-left:0}
h2.light,.sub.light{color:#fff}
.sub.light{color:#9aa4b6}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:46px;text-align:left}
.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;transition:.24s}
.card:hover{transform:translateY(-5px);box-shadow:0 28px 60px -30px rgba(15,23,42,.3)}
.ico{
  display:inline-flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:14px;
  font-size:20px;color:#fff;background:linear-gradient(135deg,var(--t),color-mix(in srgb,var(--t) 70%,#fff));
  box-shadow:0 12px 26px -12px var(--t);
}
.card h3{margin:16px 0 0;font-size:17.5px;font-weight:700}
.card p{margin:8px 0 0;font-size:14.5px;line-height:1.65;color:var(--sub)}
@media(max-width:900px){.cards{grid-template-columns:1fr}}

/* proof */
.proof-inner{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;text-align:left}
.proof-inner > div:first-child{text-align:left}
.checks{list-style:none;padding:0;margin:26px 0 0;display:flex;flex-direction:column;gap:11px}
.checks li{display:flex;gap:10px;font-size:14.5px;font-weight:500;color:var(--sub)}
.evidence{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 30px 70px -40px rgba(15,23,42,.35)}
.ev-row{padding:13px 0;border-top:1px solid #f0f2f6}
.ev-row:first-child{border-top:0;padding-top:2px}
.ev-head{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:13.5px}
.ev-head span{font-weight:700}
.ev-head .ok{font-size:10px;padding:2px 8px;border-radius:999px;background:#eafaf1;color:var(--green);font-weight:700}
.chips{margin-top:8px}
.chip{
  display:inline-flex;align-items:center;gap:5px;padding:4px 9px;border-radius:999px;
  border:1px solid var(--line);background:#f6f8fb;font-size:10.5px;font-weight:500;color:var(--sub);
}
.diff{margin-top:8px;display:flex;align-items:center;gap:8px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10.5px}
.was{background:#f4f6fa;color:var(--muted);padding:2px 7px;border-radius:5px;text-decoration:line-through}
.now{background:#fff1e6;color:#c2410c;padding:2px 7px;border-radius:5px;font-weight:700}
@media(max-width:900px){.proof-inner{grid-template-columns:1fr;gap:34px}}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:46px;text-align:left}
.step{position:relative;padding-top:20px;border-top:2px solid #ffe1c7}
.step .n{font-size:12px;font-weight:800;letter-spacing:.1em;color:var(--orange-l)}
.step h3{margin:8px 0 0;font-size:17px;font-weight:700}
.step p{margin:6px 0 0;font-size:14px;line-height:1.6;color:var(--sub)}
@media(max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.steps{grid-template-columns:1fr}}

/* cta */
.cta{position:relative;overflow:hidden;border-radius:34px;background:var(--dark);padding:74px 26px;text-align:center}
.cta-glow{position:absolute;left:50%;top:-40px;width:620px;height:420px;transform:translateX(-50%);background:rgba(255,107,0,.32);filter:blur(120px);pointer-events:none}
.cta-inner{position:relative;max-width:660px;margin:0 auto}
.cta .capture{margin-top:30px}

/* faq */
.faq{margin-top:40px;text-align:left;display:flex;flex-direction:column;gap:11px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.faq summary{
  display:flex;justify-content:space-between;align-items:center;gap:16px;cursor:pointer;
  padding:17px 20px;font-size:15.5px;font-weight:600;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.pm{position:relative;flex:0 0 26px;height:26px;border-radius:50%;background:#fff1e6}
.pm::before,.pm::after{content:"";position:absolute;left:50%;top:50%;background:var(--orange-d);transform:translate(-50%,-50%);transition:.22s}
.pm::before{width:11px;height:2px}
.pm::after{width:2px;height:11px}
.faq details[open] .pm::after{height:0}
.faq details p{margin:0;padding:0 20px 19px;font-size:14.5px;line-height:1.7;color:var(--sub)}

/* footer */
.footer{border-top:1px solid var(--line);background:#fff;padding:44px 0}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center}
.footer .tag{margin:0;font-size:14px;color:var(--sub)}
.footer .copy{margin:0;font-size:13px;color:var(--muted)}

/* toast */
.toast{
  position:fixed;left:50%;bottom:30px;transform:translate(-50%,26px);z-index:120;
  padding:13px 22px;border-radius:12px;background:var(--dark);color:#fff;
  font-size:14px;font-weight:600;box-shadow:0 20px 45px -18px rgba(0,0,0,.6);
  opacity:0;pointer-events:none;transition:.28s;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .65s cubic-bezier(.22,1,.36,1),transform .65s cubic-bezier(.22,1,.36,1)}
.reveal.in{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}