/* ============================================================
   CHEON:AI — shared stylesheet
   Design system matched to antigravity.google:
   font: Google Sans Flex · surface #FFFFFF · text #121317
   containers #F8F9FC / #EFF2F7 · outline rgba(33,34,38,.12)
   Brand accent: copper #C0763B (colon, small details only)
   ============================================================ */
:root{
  --white:#FFFFFF;
  --paper:#F8F9FC;          /* surface-container  (grey-10)  */
  --paper-2:#EFF2F7;        /* surface-container-high (grey-20) */
  --paper-3:#E6EAF0;        /* surface-container-higher (grey-50) */
  --ink:#121317;            /* on-surface (grey-1200) */
  --ink-soft:#2F3034;       /* grey-900 */
  --muted:#45474D;          /* on-surface-variant (grey-800) */
  --copper:#C0763B;
  --copper-deep:#A8622C;
  --line:rgba(33,34,38,.12);      /* outline */
  --line-weak:rgba(33,34,38,.06); /* outline-variant */
  --line-strong:rgba(33,34,38,.22);
  --radius:24px;
  --radius-lg:32px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Google Sans Flex','Google Sans',Roboto,sans-serif;
  background:var(--white);
  color:var(--ink);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:var(--copper);color:#fff}

/* dot-canvas sits behind everything */
#dotfield{position:fixed;inset:0;z-index:0;pointer-events:none}
main,header,footer{position:relative;z-index:1}

/* ---------- wordmark: bold CHEON + copper colon + regular AI ---------- */
.wordmark{
  font-family:'Jost',sans-serif;font-weight:600;letter-spacing:.22em;
  font-size:1rem;color:var(--ink);text-decoration:none;white-space:nowrap;
}
.wordmark .colon{color:var(--copper);letter-spacing:0;margin-left:-.19em;margin-right:-.03em}
.wordmark .ai{color:var(--ink);font-weight:400}

/* hero brand lockup (logo above headline) */
.hero-lockup{
  display:inline-flex;align-items:center;gap:14px;margin-bottom:36px;
  font-family:'Jost',sans-serif;font-weight:600;letter-spacing:.22em;
  font-size:1.05rem;color:var(--ink);
}
.hero-lockup .mark{display:inline-flex;flex-direction:column;gap:5px}
.hero-lockup .mark i{width:8px;height:8px;border-radius:50%;background:var(--copper);display:block}
.hero-lockup .colon{color:var(--copper);letter-spacing:0;margin-left:-.19em;margin-right:-.03em}
.hero-lockup .ai{color:var(--ink);font-weight:400}

/* ---------- nav (antigravity: plain links + dark pill CTA) ---------- */
header{position:fixed;top:0;left:0;right:0;z-index:100;padding:14px 0;background:#fff;transition:box-shadow .3s ease}
header.scrolled{box-shadow:0 1px 0 var(--line-weak),0 1px 12px rgba(33,34,38,.05)}
.nav-shell{
  max-width:1360px;margin:0 auto;padding:0 32px;
  display:flex;align-items:center;gap:40px;
}
.nav-pill{display:flex;align-items:center;gap:4px;margin-right:auto}
.nav-pill a{
  font-size:.9rem;font-weight:500;color:var(--ink);text-decoration:none;
  padding:9px 16px;border-radius:999px;transition:background .2s ease;
}
.nav-pill a:hover{background:var(--paper-2)}
.nav-pill a.active{background:var(--paper-2)}
.nav-cta{
  font-size:.9rem;font-weight:500;text-decoration:none;color:#fff;
  background:var(--ink);padding:11px 22px;border-radius:999px;
  transition:background .2s ease;white-space:nowrap;
}
.nav-cta:hover{background:var(--ink-soft)}
.nav-logo{display:flex;align-items:center;gap:10px}

/* mobile nav */
.menu-btn{display:none;background:var(--paper-2);border:none;border-radius:999px;padding:10px 18px;font-family:inherit;font-size:.9rem;font-weight:500;cursor:pointer;color:var(--ink)}

/* ---------- typography (Google Sans Flex, medium, tight) ---------- */
h1,.display{
  font-weight:500;letter-spacing:-.02em;line-height:1.08;color:var(--ink);
}
h1 em,.display em{font-style:normal;color:inherit;font-weight:inherit}
h2 em{font-style:normal;color:var(--copper);font-weight:inherit}
h2{
  font-weight:500;font-size:clamp(1.9rem,3.6vw,3rem);
  line-height:1.12;letter-spacing:-.015em;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:12px;
  font-size:.78rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);
}
.eyebrow::before{content:"";width:30px;height:1px;background:var(--copper)}
.eyebrow.center::before{display:none}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--copper);display:inline-block}

/* ---------- layout ---------- */
.container{max-width:1280px;margin:0 auto;padding:0 32px}
.narrow{max-width:880px}
section{padding:104px 0}

/* ---------- hero ---------- */
.hero{
  min-height:86vh;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:180px 32px 100px;position:relative;
}
.hero h1{font-size:clamp(3rem,6.4vw,5.4rem);max-width:17ch}
.hero .sub{margin-top:32px;max-width:56ch;font-size:1.12rem;color:var(--muted)}
.hero-actions{display:flex;align-items:center;gap:14px;margin-top:44px;flex-wrap:wrap;justify-content:center}

.page-hero{
  padding:210px 32px 84px;text-align:center;
  display:flex;flex-direction:column;align-items:center;
}
.page-hero .eyebrow{margin-bottom:28px}
.page-hero h1{font-size:clamp(2.6rem,5.2vw,4.4rem);max-width:19ch}
.page-hero .sub{margin-top:28px;max-width:54ch;font-size:1.08rem;color:var(--muted)}

/* ---------- buttons (antigravity pills) ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;text-decoration:none;
  font-size:.95rem;font-weight:500;padding:15px 30px;border-radius:999px;
  transition:background .2s ease,transform .2s ease;
}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--ink-soft)}
.btn-light{background:var(--paper-2);color:var(--ink)}
.btn-light:hover{background:var(--paper-3)}
.btn .arr{transition:transform .2s ease}
.btn:hover .arr{transform:translateX(4px)}
.link-arrow{
  font-size:.95rem;font-weight:500;color:var(--ink);text-decoration:none;
  display:inline-flex;align-items:center;gap:8px;transition:color .2s ease;
}
.link-arrow:hover{color:var(--copper)}
.link-arrow:hover .arr{transform:translateX(4px)}
.link-arrow .arr{transition:transform .2s ease}

/* ---------- section head ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:60px;flex-wrap:wrap}
.section-head p{max-width:44ch;color:var(--muted)}
.section-head.center{flex-direction:column;align-items:center;text-align:center}
.section-head.center p{max-width:54ch}
.section-head .eyebrow{margin-bottom:20px}

/* ---------- cards ---------- */
.card{
  background:#fff;border:1px solid var(--line-weak);border-radius:var(--radius);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:0 20px 44px -24px rgba(18,19,23,.16);border-color:var(--line)}
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cap-card{padding:40px 34px;display:flex;flex-direction:column;min-height:380px;text-decoration:none;color:inherit;background:var(--paper)}
.cap-num{font-size:.85rem;font-weight:500;color:var(--copper);margin-bottom:auto}
.cap-card h3{font-weight:500;font-size:1.55rem;line-height:1.2;margin:48px 0 12px;letter-spacing:-.01em}
.cap-card p{font-size:.95rem;color:var(--muted)}
.cap-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.cap-tags span{
  font-size:.72rem;font-weight:500;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-soft);border-radius:999px;padding:7px 13px;background:#fff;border:1px solid var(--line-weak);
}
.cap-card .link-arrow{margin-top:24px}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.split .eyebrow{margin-bottom:22px}
.split h2{margin-bottom:22px}
.split p{color:var(--muted)}
.split p+p{margin-top:16px}
.frame{
  border:1px solid var(--line-weak);border-radius:var(--radius-lg);overflow:hidden;background:#fff;
}
.frame img,.frame svg{width:100%;display:block}
.frame figcaption{padding:20px 26px;font-size:.84rem;color:var(--muted);border-top:1px solid var(--line-weak);background:var(--paper)}

/* ---------- band (now plain white — separation comes from whitespace) ---------- */
.band{background:#fff}
.band .card,.band .cap-card{background:var(--paper)}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.stat{padding:40px 36px;text-align:left;background:var(--paper)}
.stat .big{font-weight:500;font-size:3rem;line-height:1;letter-spacing:-.02em}
.stat .big span{color:var(--copper)}
.stat p{margin-top:14px;font-size:.9rem;color:var(--muted)}

/* ---------- list rows ---------- */
.rows{border-top:1px solid var(--line)}
.row{
  display:grid;grid-template-columns:64px 1fr 1.2fr;gap:32px;align-items:baseline;
  padding:32px 6px;border-bottom:1px solid var(--line-weak);
}
.row .k{font-size:.85rem;font-weight:500;color:var(--copper)}
.row h4{font-size:1.12rem;font-weight:500;letter-spacing:-.005em}
.row p{font-size:.95rem;color:var(--muted)}

/* ---------- process steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{padding:34px 30px;background:#fff}
.step .n{
  width:44px;height:44px;border-radius:50%;background:var(--paper-2);
  display:flex;align-items:center;justify-content:center;
  font-weight:500;color:var(--ink);margin-bottom:24px;
}
.step h4{font-size:1.05rem;font-weight:500;margin-bottom:10px}
.step p{font-size:.9rem;color:var(--muted)}

/* ---------- CTA panel ---------- */
.cta-panel{
  background:var(--paper);border:1px solid var(--line-weak);border-radius:var(--radius-lg);
  padding:92px 60px;text-align:center;
}
.cta-panel h2{max-width:22ch;margin:0 auto 20px}
.cta-panel p{color:var(--muted);max-width:50ch;margin:0 auto 40px}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line-weak);background:#fff;margin-top:40px}
.footer-grid{
  max-width:1280px;margin:0 auto;padding:68px 32px 40px;
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;
}
.footer-grid .tagline{margin-top:18px;font-size:.9rem;color:var(--muted);max-width:30ch}
.footer-grid h5{
  font-size:.74rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);margin-bottom:18px;
}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:10px}
.footer-grid a{font-size:.92rem;color:var(--ink-soft);text-decoration:none;transition:color .2s ease}
.footer-grid a:hover{color:var(--copper)}
.footer-base{
  max-width:1280px;margin:0 auto;padding:0 32px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-base small{font-size:.8rem;color:var(--muted)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}

/* ---------- marquee ---------- */
.marquee{border-top:1px solid var(--line-weak);border-bottom:1px solid var(--line-weak);overflow:hidden;padding:18px 0;background:#fff}
.marquee-track{display:flex;gap:60px;width:max-content;animation:mscroll 38s linear infinite}
.marquee-track span{
  font-size:.82rem;font-weight:500;
  letter-spacing:.2em;text-transform:uppercase;color:var(--muted);white-space:nowrap;
  display:inline-flex;align-items:center;gap:60px;
}
.marquee-track span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--copper)}
@keyframes mscroll{to{transform:translateX(-50%)}}

/* ---------- badge ---------- */
.badge{
  display:inline-block;font-size:.74rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--copper);background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;
}

/* ---------- statement (big left-aligned mission text) ---------- */
.statement{padding:140px 0}
.statement p{
  font-size:clamp(1.7rem,3.6vw,2.7rem);font-weight:500;line-height:1.3;
  letter-spacing:-.015em;color:var(--ink);max-width:26ch;
}
.caret{
  display:inline-block;width:3px;height:.95em;background:var(--copper);
  vertical-align:-.12em;margin-left:.12em;animation:blink 1.15s steps(1) infinite;
}
@keyframes blink{50%{opacity:0}}

/* ---------- feature rows (text left, glowing media card right) ---------- */
.feature{display:grid;grid-template-columns:.85fr 1.15fr;gap:80px;align-items:center;padding:70px 0}
.feature.flip .feature-media{order:-1}
.feature .knum{font-size:.85rem;font-weight:500;color:var(--copper);display:block;margin-bottom:18px}
.feature h2{margin-bottom:20px}
.feature p{color:var(--muted);max-width:44ch}
.feature .btn{margin-top:32px}
.feature-media{min-height:440px;display:flex;align-items:center;justify-content:center}

.media-card{
  width:100%;min-height:440px;border-radius:32px;padding:48px 40px;
  display:flex;align-items:center;justify-content:center;
}
.glow-blue{background:
  radial-gradient(65% 55% at 28% 18%, rgba(50,121,249,.20), transparent 70%),
  radial-gradient(55% 45% at 82% 85%, rgba(123,108,178,.16), transparent 70%),
  var(--paper)}
.glow-warm{background:
  radial-gradient(65% 55% at 75% 15%, rgba(217,106,62,.16), transparent 70%),
  radial-gradient(55% 45% at 18% 85%, rgba(242,169,59,.15), transparent 70%),
  var(--paper)}
.glow-green{background:
  radial-gradient(65% 55% at 30% 20%, rgba(62,158,107,.16), transparent 70%),
  radial-gradient(55% 45% at 80% 80%, rgba(50,121,249,.12), transparent 70%),
  var(--paper)}
.glow-violet{background:
  radial-gradient(65% 55% at 70% 18%, rgba(123,108,178,.18), transparent 70%),
  radial-gradient(55% 45% at 20% 85%, rgba(50,121,249,.12), transparent 70%),
  var(--paper)}

/* mock UI inside media cards */
.mock{
  background:#fff;border:1px solid var(--line-weak);border-radius:18px;
  box-shadow:0 24px 48px -24px rgba(18,19,23,.22);
  width:100%;max-width:430px;padding:22px 24px;
}
.mock-head{display:flex;align-items:center;gap:6px;margin-bottom:16px}
.mock-head .mdot{width:8px;height:8px;border-radius:50%;background:var(--paper-3)}
.mock-head .mtitle{margin-left:10px;font-size:.74rem;font-weight:500;color:var(--muted);letter-spacing:.02em}
.mock-row{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--line-weak)}
.mock-row:last-child{border-bottom:none}
.mock-row .mlabel{font-size:.76rem;color:var(--ink-soft);font-weight:500;min-width:118px}
.mock-row .mtrack{flex:1;height:6px;border-radius:999px;background:var(--paper-2);overflow:hidden}
.mock-row .mtrack i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#3279F9,#7B6CB2)}
.mock-row .mok{width:8px;height:8px;border-radius:50%;background:#3E9E6B;flex-shrink:0}
.mock-row .mwarn{width:8px;height:8px;border-radius:50%;background:#F2A93B;flex-shrink:0}
.mock-row .mval{margin-left:auto;font-size:.74rem;color:var(--muted);white-space:nowrap}
.mock .bubble{background:var(--paper);border-radius:14px;padding:12px 16px;font-size:.8rem;color:var(--ink-soft);margin-bottom:10px;line-height:1.5}
.mock .bubble.user{background:var(--paper-2);color:var(--ink);max-width:82%}
.mock .bubble.bot{border:1px solid var(--line-weak);background:#fff;margin-left:auto;max-width:88%}
.mock-input{
  display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;
  border:1px solid var(--line);border-radius:999px;padding:11px 18px;font-size:.78rem;color:var(--muted);
}
.mock-input b{width:26px;height:26px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:500}
.mock-chart{display:flex;align-items:flex-end;gap:10px;height:132px;padding:12px 2px 0}
.mock-chart i{flex:1;border-radius:8px 8px 4px 4px;background:var(--paper-3)}
.mock-chart i.hi{background:linear-gradient(180deg,#F2A93B,#D96A3E)}
.mock-chart i.up{background:linear-gradient(180deg,#3E9E6B,#2F7D54)}
.mock-chart i.fc{background:repeating-linear-gradient(45deg,var(--paper-3) 0 6px,#fff 6px 10px);border:1px dashed var(--line)}
.mock-legend{display:flex;gap:16px;margin-top:12px;font-size:.72rem;color:var(--muted)}
.mock-legend span{display:inline-flex;align-items:center;gap:6px}
.mock-legend span::before{content:"";width:8px;height:8px;border-radius:3px;background:var(--paper-3)}
.mock-legend span.a::before{background:#D96A3E}

/* ---------- flow stepper (Engineer → Operate → Learn → Earn) ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.flow-step{background:var(--paper);border:1px solid var(--line-weak);border-radius:20px;padding:30px 26px;position:relative}
.flow-step .fnum{font-size:.78rem;font-weight:600;color:var(--copper);letter-spacing:.08em}
.flow-step h4{font-size:1.2rem;font-weight:500;margin:14px 0 8px;letter-spacing:-.01em}
.flow-step p{font-size:.88rem;color:var(--muted)}
.flow-step:not(:last-child)::after{
  content:"→";position:absolute;right:-19px;top:50%;transform:translateY(-50%);
  color:var(--copper);font-size:1.1rem;z-index:2;
}

/* ---------- blog & post ---------- */
.post-meta{display:flex;align-items:center;gap:14px;justify-content:center;color:var(--muted);font-size:.86rem}
.post-meta .tagchip{border:1px solid var(--line);border-radius:999px;padding:5px 14px;font-size:.72rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--copper)}
.post-body{max-width:720px;margin:0 auto;font-size:1.05rem;line-height:1.85;color:var(--ink-soft)}
.post-body h2{font-size:1.5rem;margin:44px 0 14px}
.post-body h3{font-size:1.2rem;font-weight:600;margin:32px 0 10px}
.post-body p{margin-bottom:18px}
.post-body a{color:var(--copper);text-decoration:none;border-bottom:1px solid var(--copper)}
.post-body code{background:var(--paper-2);border-radius:6px;padding:2px 7px;font-size:.9em;font-family:'Google Sans Code',monospace}
.empty-note{text-align:center;color:var(--muted);padding:80px 0;font-size:1rem}

/* ---------- dot-grid duo section ---------- */
.dotgrid{
  background-image:radial-gradient(rgba(18,19,23,.20) 1.1px,transparent 1.1px);
  background-size:24px 24px;
}
.duo{display:grid;grid-template-columns:1fr 1fr;gap:48px;padding:40px 0}
.duo>div{text-align:center;padding:40px 24px}
.duo h3{font-size:clamp(1.6rem,2.6vw,2.2rem);font-weight:500;letter-spacing:-.015em;line-height:1.2}
.duo .subhead{font-size:clamp(1.6rem,2.6vw,2.2rem);font-weight:500;letter-spacing:-.015em;line-height:1.25;color:var(--muted);margin-bottom:30px}
.duo .btn{margin-top:0}

/* ---------- latest cards ---------- */
.latest-head{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:40px}
.latest-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.latest-card{text-decoration:none;color:inherit;display:block}
.latest-card .thumb{
  aspect-ratio:16/10;border-radius:20px;display:flex;align-items:center;justify-content:center;
  color:#fff;font-family:'Jost',sans-serif;font-weight:500;letter-spacing:.2em;font-size:.9rem;
  transition:transform .3s ease;position:relative;overflow:hidden;
}
.latest-card:hover .thumb{transform:translateY(-4px)}
.thumb-a{background:radial-gradient(80% 90% at 30% 20%, #2a3a68, #121317)}
.thumb-b{background:radial-gradient(80% 90% at 70% 25%, #5a3320, #121317)}
.thumb-c{background:radial-gradient(80% 90% at 30% 80%, #1f4634, #121317)}
.thumb-d{background:radial-gradient(80% 90% at 75% 75%, #45264f, #121317)}
.latest-card h4{margin-top:16px;font-size:1rem;font-weight:500;letter-spacing:-.005em}
.latest-card p{margin-top:6px;font-size:.86rem;color:var(--muted)}

/* ---------- responsive ---------- */
@media(max-width:1020px){
  .nav-pill{display:none}
  .menu-btn{display:block}
  .nav-shell{justify-content:space-between}
  .mobile-menu{
    position:fixed;top:70px;left:16px;right:16px;z-index:99;
    background:#fff;border:1px solid var(--line-weak);border-radius:20px;
    padding:12px;display:none;flex-direction:column;box-shadow:0 24px 60px -20px rgba(18,19,23,.25);
  }
  .mobile-menu.open{display:flex}
  .mobile-menu a{padding:14px 18px;border-radius:12px;text-decoration:none;color:var(--ink);font-weight:500}
  .mobile-menu a:hover{background:var(--paper)}
  .cap-grid,.stats,.steps{grid-template-columns:1fr}
  .cap-card{min-height:auto}
  .cap-card h3{margin-top:28px}
  .split{grid-template-columns:1fr;gap:48px}
  .row{grid-template-columns:44px 1fr;gap:16px}
  .row p{grid-column:2}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  section{padding:80px 0}
  .cta-panel{padding:68px 28px}
  .statement{padding:90px 0}
  .flow{grid-template-columns:1fr}
  .flow-step:not(:last-child)::after{content:"↓";right:auto;left:50%;top:auto;bottom:-21px;transform:translateX(-50%)}
  .feature{grid-template-columns:1fr;gap:40px;padding:48px 0}
  .feature.flip .feature-media{order:0}
  .feature-media,.media-card{min-height:360px}
  .duo{grid-template-columns:1fr;gap:16px}
  .latest-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:620px){
  .latest-grid{grid-template-columns:1fr}
}
@media(min-width:1021px){.mobile-menu{display:none !important}}