/* ============================================================
   AeroBI — shared design system
   Midnight ground · considered blue accent · signal-green reserved
   Display: Space Grotesk · Body: Inter
   ============================================================ */
:root{
  --ink:#0B1220;          /* midnight ground */
  --ink-2:#111a2e;        /* raised panel */
  --line:rgba(255,255,255,.09);
  --blue:#3B82F6;         /* working accent */
  --blue-soft:#60A5FA;
  --green:#16A34A;        /* reserved: live increase only */
  --green-soft:#4ade80;
  --amber:#fbbf24;
  --paper:#F4F6FB;        /* light section */
  --paper-ink:#0B1220;
  --paper-muted:#54617a;
  --muted:#8A97AE;        /* muted text on dark */
  --white:#EEF2F9;
  --radius:16px;
  --maxw:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--ink);color:var(--white);
  line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
h1,h2,h3,.display{font-family:'Space Grotesk',sans-serif;letter-spacing:-.02em;line-height:1.08}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{font-family:'Space Grotesk';font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--blue-soft)}

/* ---- BUTTONS ---- */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:'Space Grotesk';font-weight:600;font-size:14.5px;
  padding:10px 18px;border-radius:11px;cursor:pointer;transition:transform .15s ease, box-shadow .2s, background .2s, border-color .2s;border:0}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 24px rgba(59,130,246,.32)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 30px rgba(59,130,246,.45)}
.btn-ghost{background:transparent;color:var(--white);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--blue-soft);color:var(--blue-soft)}
.btn-lg{font-size:16px;padding:14px 24px}

/* ---- NAV ---- */
nav{position:sticky;top:0;z-index:50;background:rgba(11,18,32,.72);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:11px;font-family:'Space Grotesk';font-weight:700;font-size:20px;letter-spacing:-.01em;color:var(--white)}
.logo-mark{width:30px;height:30px;border-radius:9px;
  background:conic-gradient(from 210deg at 50% 50%, var(--blue), var(--blue-soft), #8ec5ff, var(--blue));
  display:grid;place-items:center;box-shadow:0 6px 20px rgba(59,130,246,.35)}
.logo-mark svg{width:17px;height:17px}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{color:var(--muted);font-size:14.5px;font-weight:500;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--white)}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--white);margin:4px 0;border-radius:2px;transition:.2s}

/* ---- PAGE HEADER (interior pages) ---- */
.page-head{position:relative;padding:80px 0 40px;overflow:hidden}
.page-head::before{content:"";position:absolute;inset:0;z-index:0;
  background:radial-gradient(680px 340px at 80% 0%, rgba(59,130,246,.16), transparent 70%);pointer-events:none}
.page-head .wrap{position:relative;z-index:1}
.page-head h1{font-size:46px;font-weight:700;margin:16px 0 16px;max-width:760px}
.page-head p.lead{font-size:19px;color:var(--muted);max-width:600px}

/* ---- SECTIONS ---- */
section.block{padding:88px 0}
.section-head{max-width:660px;margin-bottom:52px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:36px;font-weight:700;margin:14px 0 16px}
.section-head p{color:var(--muted);font-size:17px}
.shift{background:var(--paper);color:var(--paper-ink)}
.shift .eyebrow{color:var(--blue)}
.shift .section-head p,.shift p.lead{color:var(--paper-muted)}
.shift h1,.shift h2,.shift h3{color:var(--paper-ink)}

/* ---- CARDS ---- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:#fff;border:1px solid #e5e9f2;border-radius:var(--radius);padding:28px;transition:transform .18s ease, box-shadow .2s}
.card:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(11,18,32,.08)}
.card h3{font-size:20px;font-weight:600;margin-bottom:10px;color:var(--paper-ink)}
.card p{color:var(--paper-muted);font-size:15px}
.card .ic{width:42px;height:42px;border-radius:11px;background:rgba(59,130,246,.1);display:grid;place-items:center;margin-bottom:16px}
.card .ic svg{width:22px;height:22px;stroke:var(--blue);fill:none;stroke-width:2}
/* dark card variant */
.card-dark{background:linear-gradient(180deg,var(--ink-2),#0d1526);border:1px solid var(--line)}
.card-dark h3{color:var(--white)}
.card-dark p{color:var(--muted)}

/* ---- MOCK / DEMO VISUALS ---- */
.demo{position:relative;background:linear-gradient(180deg,var(--ink-2),#0d1526);border:1px solid var(--line);
  border-radius:20px;padding:22px;box-shadow:0 30px 80px rgba(0,0,0,.5)}
.demo-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.demo-title{font-family:'Space Grotesk';font-weight:600;font-size:14px;color:var(--muted)}
.live-pill{display:inline-flex;align-items:center;gap:7px;font-size:11.5px;font-weight:600;color:var(--green);
  background:rgba(22,163,74,.12);border:1px solid rgba(22,163,74,.3);padding:4px 10px;border-radius:20px;font-family:'Space Grotesk'}
.live-pill.blue{color:var(--blue-soft);background:rgba(59,130,246,.12);border-color:rgba(59,130,246,.3)}
.live-dot{position:relative;width:7px;height:7px}
.live-dot span{position:absolute;inset:0;border-radius:50%;background:var(--green)}
.live-dot span.ping{animation:ping 1.8s cubic-bezier(0,0,.2,1) infinite}
@keyframes ping{75%,100%{transform:scale(2.4);opacity:0}}
.kpi-big{font-family:'Space Grotesk';font-weight:700;font-size:44px;letter-spacing:-.03em;line-height:1}
.kpi-label{color:var(--muted);font-size:13px;margin-top:4px}
.delta{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13.5px;font-weight:600;font-family:'Space Grotesk';
  color:var(--green);background:rgba(22,163,74,.1);border:1px solid rgba(22,163,74,.28);padding:5px 11px;border-radius:10px;
  opacity:0;transform:translateY(-6px);transition:opacity .4s,transform .4s}
.delta.show{opacity:1;transform:translateY(0)}
.spark{margin-top:22px;height:76px;width:100%}
.demo-row{display:flex;gap:12px;margin-top:20px}
.mini{flex:1;background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.mini .v{font-family:'Space Grotesk';font-weight:600;font-size:18px}
.mini .l{color:var(--muted);font-size:11.5px;margin-top:2px}
.bars{display:flex;align-items:flex-end;gap:9px;height:120px;padding-top:10px}
.bars .bar{flex:1;background:linear-gradient(180deg,var(--blue),rgba(59,130,246,.25));border-radius:6px 6px 0 0}
.bars .bar.peak{background:linear-gradient(180deg,var(--green),rgba(22,163,74,.3))}
.insight{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:12px}
.insight .badge{display:inline-block;font-size:10.5px;font-weight:700;font-family:'Space Grotesk';text-transform:uppercase;
  letter-spacing:.08em;padding:3px 8px;border-radius:6px;margin-bottom:9px}
.badge.up{background:rgba(22,163,74,.14);color:var(--green-soft)}
.badge.watch{background:rgba(245,158,11,.14);color:var(--amber)}
.insight p{font-size:13.5px;color:var(--white);margin:0}
.insight .rec{color:var(--blue-soft);font-size:12.5px;margin-top:8px;font-weight:500}

/* ---- SCREEN-RECORDING SLOTS (swap in real captures later) ---- */
.capture-slot{position:relative;border:1px dashed rgba(96,165,250,.4);border-radius:14px;overflow:hidden;
  background:linear-gradient(180deg,var(--ink-2),#0d1526)}
.capture-slot video,.capture-slot img{display:block;width:100%;height:auto}
.capture-badge{position:absolute;top:12px;left:12px;z-index:2;font-family:'Space Grotesk';font-size:11px;font-weight:600;
  color:var(--blue-soft);background:rgba(11,18,32,.7);border:1px solid var(--line);padding:4px 10px;border-radius:20px}

/* ---- HOW-IT-WORKS STEP RAIL ---- */
.rail{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:52px 0;border-bottom:1px solid var(--line)}
.rail:last-child{border-bottom:0}
.rail.flip .rail-visual{order:-1}
.step-no{font-family:'Space Grotesk';font-weight:700;font-size:15px;color:var(--blue-soft);
  display:inline-flex;align-items:center;gap:10px;margin-bottom:14px}
.step-no::before{content:"";width:28px;height:1px;background:var(--blue-soft)}
.rail h3{font-size:28px;font-weight:600;margin-bottom:14px}
.rail p{color:var(--muted);font-size:16px}
.rail-visual{background:linear-gradient(180deg,var(--ink-2),#0d1526);border:1px solid var(--line);
  border-radius:18px;padding:24px;min-height:240px;position:relative;overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,.35)}

/* ---- FEATURE ROWS ---- */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:52px 0;border-bottom:1px solid var(--line)}
.feature:last-child{border-bottom:0}
.feature.flip .feat-visual{order:-1}
.feature h3{font-size:26px;font-weight:600;margin:12px 0 14px}
.feature p{color:var(--muted);font-size:16px;margin-bottom:18px}
.feature ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.feature li{display:flex;gap:11px;align-items:flex-start;font-size:15px;color:var(--white)}
.feature li svg{width:19px;height:19px;stroke:var(--green);fill:none;stroke-width:2;flex-shrink:0;margin-top:2px}
.feat-visual{background:linear-gradient(180deg,var(--ink-2),#0d1526);border:1px solid var(--line);border-radius:18px;
  padding:24px;min-height:260px;position:relative;overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,.35)}

/* ---- STAT BAR ---- */
.statbar{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.statbar-in{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:30px 20px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat .n{font-family:'Space Grotesk';font-weight:700;font-size:30px;color:var(--white)}
.stat .n b{color:var(--blue-soft)}
.stat .t{color:var(--muted);font-size:13px;margin-top:4px}

/* ---- PRICING ---- */
.price-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.price-calc{background:linear-gradient(180deg,var(--ink-2),#0d1526);border:1px solid var(--line);border-radius:20px;padding:30px;box-shadow:0 30px 80px rgba(0,0,0,.5)}
.calc-row{margin-bottom:22px}
.calc-row label{display:block;font-family:'Space Grotesk';font-size:13px;font-weight:600;color:var(--muted);margin-bottom:10px}
.seg{display:flex;gap:8px;flex-wrap:wrap}
.seg button{flex:1;min-width:64px;background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--white);
  border-radius:11px;padding:11px 8px;font-family:'Space Grotesk';font-weight:600;font-size:14px;cursor:pointer;transition:.18s}
.seg button.on{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 6px 18px rgba(59,130,246,.35)}
.calc-out{border-top:1px solid var(--line);margin-top:8px;padding-top:22px;text-align:center}
.calc-out .est{font-family:'Space Grotesk';font-weight:700;font-size:38px;letter-spacing:-.02em}
.calc-out .est span{font-size:15px;color:var(--muted);font-weight:500}
.calc-out .cap{color:var(--muted);font-size:13px;margin-top:6px}
.price-principles{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:16px}
.principle{background:linear-gradient(180deg,var(--ink-2),#0d1526);border:1px solid var(--line);border-radius:14px;padding:24px}
.principle .ic{width:40px;height:40px;border-radius:10px;background:rgba(59,130,246,.12);display:grid;place-items:center;margin-bottom:14px}
.principle .ic svg{width:20px;height:20px;stroke:var(--blue-soft);fill:none;stroke-width:2}
.principle h3{font-size:17px;font-weight:600;margin-bottom:8px}
.principle p{color:var(--muted);font-size:14px}

/* ---- FORM ---- */
.form-wrap{max-width:640px;margin:0 auto}
form.lead{display:grid;grid-template-columns:1fr 1fr;gap:16px}
form.lead .full{grid-column:1/-1}
.field label{display:block;font-size:12.5px;font-weight:600;color:var(--muted);margin-bottom:6px;font-family:'Space Grotesk'}
.field input,.field select,.field textarea{width:100%;background:rgba(255,255,255,.04);border:1px solid var(--line);
  border-radius:11px;padding:12px 14px;color:var(--white);font-size:15px;font-family:inherit;transition:border-color .2s}
.field input::placeholder,.field textarea::placeholder{color:#5c6a83}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue)}
.field select option{background:var(--ink-2)}
.field textarea{resize:vertical;min-height:96px}
form.lead .btn{grid-column:1/-1;justify-content:center}
.form-note{grid-column:1/-1;text-align:center;color:var(--muted);font-size:13px}
.form-msg{grid-column:1/-1;border-radius:11px;padding:14px;text-align:center;font-size:14.5px;display:none}
.form-msg.ok{background:rgba(22,163,74,.12);border:1px solid rgba(22,163,74,.3);color:var(--green-soft)}
.form-msg.err{background:rgba(220,38,38,.12);border:1px solid rgba(220,38,38,.3);color:#f87171}

/* ---- CTA STRIP ---- */
.cta{background:radial-gradient(700px 340px at 50% 0%, rgba(59,130,246,.18), transparent 70%),var(--ink-2);border-top:1px solid var(--line)}
.cta-in{max-width:620px;margin:0 auto;text-align:center}
.cta h2{font-size:38px;font-weight:700;margin-bottom:14px}
.cta p{color:var(--muted);font-size:17px;margin-bottom:30px}

/* ---- FOOTER ---- */
footer{border-top:1px solid var(--line);padding:48px 0 40px}
.foot-in{display:flex;justify-content:space-between;align-items:flex-start;gap:40px;flex-wrap:wrap}
.foot-brand{max-width:300px}
.foot-brand p{color:var(--muted);font-size:14px;margin-top:14px}
.foot-cols{display:flex;gap:60px;flex-wrap:wrap}
.foot-col h4{font-family:'Space Grotesk';font-size:13px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-bottom:14px}
.foot-col a{display:block;color:var(--white);font-size:14.5px;margin-bottom:10px;transition:color .2s}
.foot-col a:hover{color:var(--blue-soft)}
.foot-bottom{border-top:1px solid var(--line);margin-top:40px;padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;color:var(--muted);font-size:13px}

/* ---- RESPONSIVE ---- */
@media(max-width:900px){
  .grid-2,.grid-3,.price-principles,form.lead,.price-hero{grid-template-columns:1fr}
  .rail,.rail.flip,.feature,.feature.flip{grid-template-columns:1fr;gap:28px}
  .rail.flip .rail-visual,.feature.flip .feat-visual{order:0}
  .statbar-in{grid-template-columns:1fr 1fr}
  .stat:nth-child(2){border-right:0}
  .stat{border-bottom:1px solid var(--line)}
  .page-head h1{font-size:36px}
  .nav-links,.nav-cta .btn-ghost{display:none}
  .nav-toggle{display:block}
  .nav-links.open{display:flex;position:absolute;top:68px;left:0;right:0;flex-direction:column;
    background:var(--ink);border-bottom:1px solid var(--line);padding:16px 24px;gap:16px}
  .nav-links.open a{font-size:16px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto}}
:focus-visible{outline:2px solid var(--blue-soft);outline-offset:3px;border-radius:6px}