/* =========================================================
   BTI AI OS — Premium Design System (Global-500 grade)
   Fonts: Sora (display) + Inter (body) via Google Fonts
   ========================================================= */
:root{
  --font-display:'Sora',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-body:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --navy:#071a33; --navy-2:#0b2a52;
  --ink:#0b1220; --muted:#5b6678;
  --blue:#2563eb; --blue-600:#1d4ed8; --blue-50:#eef4ff;
  --accent:#22d3ee;
  --bg:#ffffff; --bg-2:#f5f8fd; --line:#e6ecf5;
  --radius:20px; --radius-sm:13px;
  --shadow-sm:0 1px 2px rgba(7,26,51,.05),0 6px 16px rgba(7,26,51,.06);
  --shadow-md:0 12px 34px rgba(7,26,51,.10);
  --shadow-lg:0 30px 70px rgba(7,26,51,.18);
  --maxw:1200px; --ease:cubic-bezier(.22,.61,.36,1);
}
/* Hawkland accent override */
body.hawkland{--blue:#0ea5e9;--blue-600:#0284c7;--blue-50:#eaf6ff;--accent:#14b8a6;}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-body);color:var(--ink);background:var(--bg);
  line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.12;color:var(--navy);margin:0;letter-spacing:-.02em;font-weight:700}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.muted{color:var(--muted)}
.eyebrow{display:inline-block;font-family:var(--font-body);font-size:13px;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;color:var(--blue);margin-bottom:14px}
.grad-text{background:linear-gradient(100deg,var(--blue),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:clamp(17px,2vw,20px);color:var(--muted);max-width:640px}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:15px;
  background:var(--blue);color:#fff;padding:13px 24px;border-radius:12px;cursor:pointer;border:0;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s}
.btn:hover{background:var(--blue-600);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn.ghost{background:transparent;color:var(--navy);border:1.5px solid var(--line)}
.btn.ghost:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-50)}
.btn .ar{transition:transform .25s var(--ease)}
.btn:hover .ar{transform:translateX(4px)}

/* Header / nav */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.72);
  backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid transparent;transition:.3s}
.site-header.scrolled{background:rgba(255,255,255,.9);border-color:var(--line);box-shadow:var(--shadow-sm)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-display);font-weight:800;font-size:19px;color:var(--navy)}
.brand .logo{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--blue),var(--navy));
  display:grid;place-items:center;color:#fff;font-weight:800;font-size:15px;box-shadow:var(--shadow-sm)}
.nav-links{display:flex;gap:30px;list-style:none;margin:0;padding:0}
.nav-links a{position:relative;font-weight:600;font-size:14.5px;color:var(--ink);opacity:.78;padding:6px 0;transition:.2s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;background:var(--blue);
  transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.nav-links a:hover,.nav-links a.active{opacity:1;color:var(--navy)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px}
.dm-toggle{width:40px;height:40px;border-radius:11px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:16px;transition:.2s}
.dm-toggle:hover{border-color:var(--blue);color:var(--blue)}
.menu-btn{display:none;background:none;border:0;font-size:26px;cursor:pointer;color:var(--navy)}
.mobile-menu{display:none;position:fixed;inset:74px 0 auto 0;background:#fff;border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-md);padding:18px 24px;z-index:59}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:13px 0;font-weight:600;border-bottom:1px solid var(--line)}
@media(max-width:880px){.nav-links{display:none}.menu-btn{display:block}}

/* Hero */
.hero{position:relative;min-height:90vh;display:flex;align-items:center;color:#fff;overflow:hidden;
  background:#06182f}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.05)}
.hero-bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(6,20,38,.94) 30%,rgba(6,20,38,.55) 70%,rgba(6,20,38,.35)),
             radial-gradient(900px 500px at 85% 10%,rgba(34,211,238,.22),transparent)}
.hero .container{position:relative;z-index:2;padding:120px 24px 90px}
.hero .chip{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.22);backdrop-filter:blur(8px);padding:7px 15px;border-radius:99px;
  font-size:12.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:#dbeafe}
.hero h1{color:#fff;font-size:clamp(40px,6.2vw,76px);margin:18px 0 0;max-width:14ch}
.hero .lead{color:rgba(255,255,255,.86);margin-top:22px;font-size:clamp(17px,2vw,21px)}
.hero-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero-cta .btn.ghost{color:#fff;border-color:rgba(255,255,255,.35)}
.hero-cta .btn.ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff}
.hero-stats{display:flex;gap:30px;flex-wrap:wrap;margin-top:48px}
.hero-stat .num{font-family:var(--font-display);font-size:38px;font-weight:800;color:#fff;line-height:1}
.hero-stat .num span{color:var(--accent)}
.hero-stat .lbl{color:rgba(255,255,255,.74);font-size:13.5px;margin-top:6px;letter-spacing:.02em}
.scroll-ind{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:2;
  color:rgba(255,255,255,.6);font-size:12px;letter-spacing:.2em;text-transform:uppercase}
.scroll-ind::after{content:"";display:block;width:1px;height:34px;margin:10px auto 0;
  background:linear-gradient(rgba(255,255,255,.6),transparent);animation:scrolly 1.8s var(--ease) infinite}
@keyframes scrolly{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* Sections */
.section{padding:96px 0}
.section.alt{background:var(--bg-2)}
.sec-head{max-width:720px;margin-bottom:48px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head h2{font-size:clamp(28px,3.6vw,44px)}
.sec-head p{color:var(--muted);font-size:18px;margin-top:14px}

/* Feature cards */
.grid{display:grid;gap:24px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
@media(max-width:980px){.grid.c3,.grid.c4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;
  box-shadow:var(--shadow-sm);transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s}
.card:hover{transform:translateY(-7px);box-shadow:var(--shadow-lg);border-color:rgba(37,99,235,.4)}
.card .ic{width:58px;height:58px;border-radius:15px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--blue-50),#fff);color:var(--blue);margin-bottom:18px;
  border:1px solid var(--line);transition:.35s}
.card:hover .ic{background:linear-gradient(135deg,var(--blue),var(--navy));color:#fff;transform:scale(1.05)}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px;margin:0}
.card .more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;color:var(--blue);font-weight:600;font-size:14px}

/* Stats band */
.statband{background:linear-gradient(120deg,var(--navy),var(--navy-2));color:#fff;border-radius:var(--radius);
  padding:54px 40px;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.statband .num{font-family:var(--font-display);font-size:clamp(34px,4vw,52px);font-weight:800;color:#fff}
.statband .num span{color:var(--accent)}
.statband .lbl{color:rgba(255,255,255,.72);margin-top:8px;font-size:14.5px}
@media(max-width:820px){.statband{grid-template-columns:repeat(2,1fr)}}

/* Process timeline */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;counter-reset:step;margin-top:10px}
.timeline .step{position:relative;padding:30px 22px 0;border-top:2px solid var(--line)}
.timeline .step::before{counter-increment:step;content:counter(step,decimal-leading-zero);
  font-family:var(--font-display);font-weight:800;color:var(--blue);font-size:15px}
.timeline .step h4{margin:14px 0 8px;font-size:17px}
.timeline .step p{color:var(--muted);font-size:14.5px;margin:0}
@media(max-width:820px){.timeline{grid-template-columns:repeat(2,1fr)}}

/* Logo marquee */
.marquee{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.marquee .track{display:flex;gap:18px;width:max-content;animation:scrollx 28s linear infinite}
.marquee .track .p{flex:0 0 auto;background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:16px 26px;font-weight:700;color:var(--muted);font-family:var(--font-display);white-space:nowrap}
@keyframes scrollx{to{transform:translateX(-50%)}}
.marquee:hover .track{animation-play-state:paused}

/* CTA band */
.cta-band{position:relative;overflow:hidden;border-radius:26px;padding:64px 48px;
  background:linear-gradient(120deg,var(--blue),var(--navy));color:#fff;text-align:center}
.cta-band h2{color:#fff;font-size:clamp(26px,3.4vw,40px)}
.cta-band p{color:rgba(255,255,255,.85);max-width:560px;margin:14px auto 28px;font-size:17px}
.cta-band .btn{background:#fff;color:var(--navy)}
.cta-band .btn:hover{background:#eef4ff}

/* Quote */
.quote{font-family:var(--font-display);font-size:clamp(22px,3vw,32px);line-height:1.4;color:var(--navy);
  font-weight:600;max-width:820px}
.quote .mark{color:var(--accent)}
.byline{margin-top:22px;display:flex;align-items:center;gap:14px}
.byline .av{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--navy))}
.byline .who{font-weight:700;color:var(--navy)}
.byline .role{color:var(--muted);font-size:14px}

/* Forms */
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:16px}
.field label{font-size:13.5px;font-weight:600;color:var(--ink)}
.field input,.field textarea{padding:13px 15px;border:1px solid var(--line);border-radius:11px;font:inherit;
  font-size:15px;transition:.2s;background:#fff}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 4px var(--blue-50)}
.notice{background:#eaf6ff;border:1px solid #b9e0ff;color:var(--blue-600);padding:13px 15px;border-radius:11px;font-size:14.5px}

/* Footer */
.site-footer{background:var(--navy);color:#c4d2e8;padding:72px 0 30px;margin-top:0}
.site-footer h3{color:#fff;font-size:17px;margin-bottom:16px}
.site-footer a{color:#c4d2e8;transition:.2s}
.site-footer a:hover{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
.foot-brand{font-family:var(--font-display);font-weight:800;font-size:20px;color:#fff;display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--blue),var(--navy));display:grid;place-items:center;color:#fff;font-weight:800;font-size:14px}
.foot-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px}
.socials{display:flex;gap:10px;margin-top:18px}
.socials a{width:38px;height:38px;border-radius:10px;background:rgba(255,255,255,.08);display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.12);transition:.2s}
.socials a:hover{background:var(--blue);border-color:var(--blue)}
.newsletter{display:flex;gap:8px;margin-top:8px}
.newsletter input{flex:1;padding:11px 14px;border-radius:10px;border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);color:#fff;font:inherit}
.newsletter input::placeholder{color:#8aa0c4}
.newsletter button{background:var(--blue);color:#fff;border:0;border-radius:10px;padding:0 18px;font-weight:600;cursor:pointer}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:46px;padding-top:22px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13.5px;color:#8aa0c4}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.marquee .track{animation:none}.scroll-ind::after{animation:none}}

/* ===================== DARK MODE ===================== */
body.dark{background:#0b1424;color:#dbe4f1}
body.dark h1,body.dark h2,body.dark h3,body.dark h4{color:#f1f6ff}
body.dark .muted{color:#9fb0cb}
body.dark .site-header,
body.dark .site-header.scrolled{background:rgba(11,20,36,.92)!important;border-color:#1d2a44;box-shadow:0 1px 2px rgba(0,0,0,.35)}
body.dark .site-header .brand{color:#f1f6ff}
body.dark .nav-links a{color:#c4d2e8}
body.dark .nav-links a:hover,body.dark .nav-links a.active{color:#fff}
body.dark .dm-toggle{background:#121d33;border-color:#1d2a44;color:#c4d2e8}
body.dark .mobile-menu{background:#0b1424;border-color:#1d2a44}
body.dark .mobile-menu a{color:#c4d2e8;border-color:#1d2a44}
body.dark .card{background:#121d33;border-color:#1d2a44;box-shadow:none}
body.dark .card .ic{background:linear-gradient(135deg,#16243f,#121d33);border-color:#1d2a44}
body.dark .card:hover .ic{background:linear-gradient(135deg,var(--blue),var(--navy-2))}
body.dark .section.alt{background:#0f1a30}
body.dark .btn.ghost{color:#f1f6ff;border-color:#1d2a44}
body.dark .btn.ghost:hover{background:#16243f;border-color:var(--blue);color:#fff}
body.dark .field input,body.dark .field textarea{background:#0f1a30;border-color:#1d2a44;color:#f1f6ff}
body.dark .field label{color:#dbe4f1}
body.dark .notice{background:#0f2230;border-color:#1d4a5e;color:#9fe6f0}
body.dark .statband{background:linear-gradient(120deg,#0b1424,#0f1a30)}
body.dark .statband .num span{color:var(--accent)}
body.dark .cta-band{background:linear-gradient(120deg,var(--blue-600),var(--navy-2))}
body.dark .timeline .step{border-color:#1d2a44}
body.dark .timeline .step h4{color:#f1f6ff}
body.dark .marquee .track .p{background:#121d33;border-color:#1d2a44;color:#9fb0cb}
body.dark .socials a{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14)}
body.dark .foot-brand{color:#fff}