/* ============================================================
   ELYONAI — Design tokens & base
   ============================================================ */
:root{
  /* brand */
  --cyan: #2BC5FF;
  --cyan-2: #5BD4FF;
  --cyan-deep: #0C82BC;     /* readable cyan on white */
  --cyan-ink: #0a6f9f;

  /* neutrals */
  --ink-900: #11151B;
  --ink-700: #33373D;       /* brand gray */
  --ink-500: #5A626C;
  --ink-300: #8A929C;

  /* dark surfaces */
  --bg-dark: #0A0E13;
  --bg-dark-2: #0D131A;
  --surface-dark: #111922;
  --surface-dark-2: #0F161E;
  --line-dark: rgba(255,255,255,.09);
  --line-dark-2: rgba(255,255,255,.05);
  --txt-d: #E9EFF5;
  --txt-d-mut: #93A1AE;

  /* light surfaces */
  --bg-light: #FFFFFF;
  --bg-light-2: #F3F7FA;
  --surface-light: #FFFFFF;
  --line-light: rgba(17,21,27,.09);
  --line-light-2: rgba(17,21,27,.05);
  --txt-l: #161B22;
  --txt-l-mut: #5A626C;

  /* accent (tweakable) */
  --accent: var(--cyan);
  --accent-deep: var(--cyan-deep);

  /* type (tweakable) */
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Manrope", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* rhythm */
  --density: 1;
  --section-y: calc(120px * var(--density));
  --container: 1200px;
  --radius: 16px;
  --radius-lg: 22px;
  --radius-sm: 10px;

  /* glow (tweakable) */
  --glow: 1;

  --shadow-card: 0 1px 2px rgba(17,21,27,.04), 0 12px 32px -12px rgba(17,21,27,.12);
  --shadow-pop: 0 30px 80px -30px rgba(11,16,22,.55);
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){ html{ scroll-behavior:auto; } }
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--bg-dark);
  color:var(--txt-d);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4{ font-family:var(--font-display); font-weight:600; letter-spacing:-.02em; line-height:1.05; margin:0; }
p{ margin:0; }
a{ color:inherit; text-decoration:none; }
img{ display:block; max-width:100%; }
.container{ width:min(var(--container), 92vw); margin-inline:auto; }

/* selection */
::selection{ background:color-mix(in oklab, var(--accent) 28%, transparent); color:#fff; }

/* ---------- shared section frames ---------- */
.section{ position:relative; padding-block:var(--section-y); }
.sec-dark{ background:var(--bg-dark); color:var(--txt-d); }
.sec-dark-2{ background:var(--bg-dark-2); color:var(--txt-d); }
.sec-light{ background:var(--bg-light); color:var(--txt-l); }
.sec-light-2{ background:var(--bg-light-2); color:var(--txt-l); }

/* eyebrow / mono label */
.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px; font-weight:500; letter-spacing:.16em; text-transform:uppercase;
  display:inline-flex; align-items:center; gap:10px; color:var(--accent-deep);
}
.sec-dark .eyebrow, .sec-dark-2 .eyebrow{ color:var(--cyan); }
.eyebrow::before{ content:""; width:22px; height:1px; background:currentColor; opacity:.6; }

.h-kicker{ margin-bottom:18px; }
.sec-title{ font-size:clamp(30px, 4.2vw, 50px); line-height:1.04; }
.sec-sub{ margin-top:18px; font-size:clamp(16px,1.5vw,19px); line-height:1.6; max-width:62ch; color:var(--txt-l-mut); }
.sec-dark .sec-sub, .sec-dark-2 .sec-sub{ color:var(--txt-d-mut); }
.sec-head{ max-width:760px; }
.sec-head.center{ margin-inline:auto; text-align:center; }
.sec-head.center .sec-sub{ margin-inline:auto; }
.sec-head.center .eyebrow::before{ display:none; }

/* ---------- buttons ---------- */
.btn{
  --b-pad-y:14px; --b-pad-x:24px;
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  font-family:var(--font-body); font-weight:600; font-size:15px; letter-spacing:.005em;
  padding:var(--b-pad-y) var(--b-pad-x); border-radius:999px; cursor:pointer;
  border:1px solid transparent; transition:transform .25s cubic-bezier(.2,.7,.3,1), box-shadow .25s, background .25s, border-color .25s, color .2s;
  white-space:nowrap;
}
.btn svg{ width:17px; height:17px; }
.btn-primary{
  background:linear-gradient(180deg, color-mix(in oklab, var(--accent) 92%, white), var(--accent));
  color:#062231;
  box-shadow: 0 1px 0 rgba(255,255,255,.4) inset, 0 calc(14px*var(--glow)) calc(34px*var(--glow)) -14px color-mix(in oklab, var(--accent) 70%, transparent);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 1px 0 rgba(255,255,255,.5) inset, 0 calc(22px*var(--glow)) calc(46px*var(--glow)) -14px color-mix(in oklab, var(--accent) 80%, transparent); }
.btn-ghost{ background:transparent; border-color:var(--line-dark); color:var(--txt-d); }
.btn-ghost:hover{ border-color:color-mix(in oklab, var(--cyan) 55%, transparent); background:rgba(255,255,255,.03); transform:translateY(-2px); }
.sec-light .btn-ghost, .sec-light-2 .btn-ghost{ border-color:var(--line-light); color:var(--txt-l); }
.sec-light .btn-ghost:hover, .sec-light-2 .btn-ghost:hover{ background:color-mix(in oklab, var(--cyan) 7%, transparent); border-color:color-mix(in oklab, var(--cyan) 45%, transparent); }
.btn-lg{ --b-pad-y:17px; --b-pad-x:30px; font-size:16px; }
.btn .arrow{ transition:transform .25s; }
.btn:hover .arrow{ transform:translateX(3px); }

/* chips */
.chip{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-mono); font-size:12.5px; font-weight:500; letter-spacing:.02em;
  padding:8px 13px; border-radius:999px; border:1px solid var(--line-dark);
  color:var(--txt-d-mut); background:rgba(255,255,255,.02);
}
.chip .dot{ width:6px; height:6px; border-radius:50%; background:var(--cyan); box-shadow:0 0 0 3px color-mix(in oklab, var(--cyan) 22%, transparent); }
.sec-light .chip, .sec-light-2 .chip{ border-color:var(--line-light); color:var(--txt-l-mut); background:#fff; }

/* ============================================================
   NAVBAR
   ============================================================ */
.nav{
  position:fixed; inset:0 0 auto 0; z-index:60;
  display:flex; align-items:center; justify-content:center;
  transition:background .3s, border-color .3s, backdrop-filter .3s;
  border-bottom:1px solid transparent;
}
.nav-inner{ width:min(var(--container), 92vw); display:flex; align-items:center; justify-content:space-between; padding:18px 0; }
.nav.scrolled{ background:color-mix(in oklab, var(--bg-dark) 78%, transparent); backdrop-filter:blur(14px) saturate(1.2); border-bottom-color:var(--line-dark); }
.nav.scrolled .nav-inner{ padding:12px 0; }
.brand{ display:flex; align-items:center; gap:12px; }
.brand img{ height:38px; width:auto; filter:drop-shadow(0 4px 12px rgba(43,197,255,.25)); }
.brand .wm{ font-family:var(--font-display); font-weight:700; font-size:22px; letter-spacing:-.01em; color:#fff; }
.brand .wm b{ color:var(--cyan); font-weight:700; }
.nav-links{ display:flex; align-items:center; gap:6px; }
.nav-links a{
  font-size:14.5px; font-weight:500; color:var(--txt-d-mut); padding:9px 14px; border-radius:999px;
  transition:color .2s, background .2s; position:relative;
}
.nav-links a:hover{ color:#fff; background:rgba(255,255,255,.04); }
.nav-links a.active{ color:#fff; }
.nav-cta{ display:flex; align-items:center; gap:14px; }
.nav-toggle{ display:none; }

@media (max-width: 940px){
  .nav-links, .nav-cta .btn{ display:none; }
  .nav-toggle{ display:inline-flex; align-items:center; justify-content:center; width:44px; height:44px; border-radius:12px; border:1px solid var(--line-dark); background:rgba(255,255,255,.03); cursor:pointer; }
  .nav-toggle span{ position:relative; width:18px; height:2px; background:#fff; border-radius:2px; transition:.3s; }
  .nav-toggle span::before,.nav-toggle span::after{ content:""; position:absolute; left:0; width:18px; height:2px; background:#fff; border-radius:2px; transition:.3s; }
  .nav-toggle span::before{ top:-6px; } .nav-toggle span::after{ top:6px; }
  body.menu-open .nav-toggle span{ background:transparent; }
  body.menu-open .nav-toggle span::before{ top:0; transform:rotate(45deg); }
  body.menu-open .nav-toggle span::after{ top:0; transform:rotate(-45deg); }
}
/* mobile drawer */
.drawer{
  position:fixed; inset:0; z-index:55; background:color-mix(in oklab, var(--bg-dark) 96%, transparent);
  backdrop-filter:blur(8px); display:flex; flex-direction:column; gap:6px; padding:120px 7vw 40px;
  opacity:0; pointer-events:none; transition:opacity .3s; transform:translateY(-8px);
}
body.menu-open .drawer{ opacity:1; pointer-events:auto; transform:none; }
.drawer a{ font-family:var(--font-display); font-size:30px; font-weight:600; color:#fff; padding:12px 0; border-bottom:1px solid var(--line-dark); }
.drawer .btn{ margin-top:24px; }

/* ============================================================
   HERO
   ============================================================ */
.hero{
  position:relative; min-height:100vh; display:flex; align-items:center;
  padding-top:120px; padding-bottom:80px; overflow:hidden;
  background:
    radial-gradient(120% 90% at 100% -10%, color-mix(in oklab, var(--cyan) calc(16%*var(--glow)), transparent), transparent 55%),
    radial-gradient(80% 70% at -10% 110%, color-mix(in oklab, var(--cyan) calc(8%*var(--glow)), transparent), transparent 60%),
    var(--bg-dark);
}
#hero-particles{ position:absolute; inset:0; z-index:0; pointer-events:none; }
.hero-grid{
  position:absolute; inset:0; z-index:0; opacity:.5;
  background-image:
    linear-gradient(var(--line-dark-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-dark-2) 1px, transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(120% 100% at 50% 0%, #000 30%, transparent 78%);
          mask-image:radial-gradient(120% 100% at 50% 0%, #000 30%, transparent 78%);
}
.hero .container{ position:relative; z-index:2; display:grid; grid-template-columns:1.04fr .96fr; gap:54px; align-items:center; }
.hero-left{ max-width:600px; }
.hero h1{ font-size:clamp(38px, 5.4vw, 66px); line-height:1.0; letter-spacing:-.025em; }
.hero h1 .accent{ color:var(--cyan); }
.hero-sub{ margin-top:24px; font-size:clamp(16px,1.55vw,19px); line-height:1.62; color:var(--txt-d-mut); max-width:55ch; }
.hero-cta{ margin-top:34px; display:flex; gap:14px; flex-wrap:wrap; }
.hero-badges{ margin-top:40px; display:flex; flex-wrap:wrap; gap:10px; }
.hero-pill{ display:inline-flex; align-items:center; gap:8px; font-family:var(--font-mono); font-size:12px; letter-spacing:.02em; color:var(--txt-d-mut); padding:7px 12px; border-radius:999px; border:1px solid var(--line-dark); background:rgba(255,255,255,.02); }
.hero-pill svg{ width:14px; height:14px; color:var(--cyan); }

/* hero visual / node diagram */
.hero-visual{ position:relative; height:520px; }
.flow-svg{ position:absolute; inset:0; width:100%; height:100%; overflow:visible; z-index:1; }
.flow-svg path{ fill:none; stroke:var(--line-dark); stroke-width:1.5; }
.flow-svg path.live{ stroke:color-mix(in oklab, var(--cyan) 70%, transparent); stroke-width:1.6; stroke-dasharray:7 9; animation:dashflow 1.1s linear infinite; }
@keyframes dashflow{ to{ stroke-dashoffset:-32; } }
.flow-svg .pulse{ fill:var(--cyan); filter:drop-shadow(0 0 6px var(--cyan)); }

.node-card{
  position:absolute; z-index:2; background:color-mix(in oklab, var(--surface-dark) 92%, transparent);
  border:1px solid var(--line-dark); border-radius:14px; padding:13px 15px; min-width:172px;
  box-shadow:var(--shadow-pop); backdrop-filter:blur(8px);
  display:flex; align-items:center; gap:11px;
}
.node-card .ic{ width:34px; height:34px; border-radius:9px; display:grid; place-items:center; flex:none; background:rgba(255,255,255,.05); border:1px solid var(--line-dark); }
.node-card .ic svg{ width:18px; height:18px; }
.node-card .tt{ font-size:13px; font-weight:600; color:var(--txt-d); line-height:1.2; }
.node-card .st{ font-family:var(--font-mono); font-size:10.5px; color:var(--txt-d-mut); margin-top:3px; letter-spacing:.02em; }
.node-card.is-accent{ border-color:color-mix(in oklab, var(--cyan) 45%, transparent); box-shadow:var(--shadow-pop), 0 0 0 1px color-mix(in oklab, var(--cyan) 30%, transparent), 0 calc(20px*var(--glow)) calc(50px*var(--glow)) -20px color-mix(in oklab, var(--cyan) 80%, transparent); }
.node-card.is-accent .ic{ background:color-mix(in oklab, var(--cyan) 16%, transparent); border-color:color-mix(in oklab, var(--cyan) 35%, transparent); color:var(--cyan); }

/* central engine card */
.engine{
  position:absolute; left:50%; top:50%; transform:translate(-50%,-50%); z-index:3;
  width:198px; border-radius:18px; background:linear-gradient(180deg, var(--surface-dark), var(--surface-dark-2));
  border:1px solid color-mix(in oklab, var(--cyan) 30%, var(--line-dark));
  box-shadow:var(--shadow-pop), 0 calc(40px*var(--glow)) calc(90px*var(--glow)) -30px color-mix(in oklab, var(--cyan) 60%, transparent);
  padding:16px;
}
.engine .eg-top{ display:flex; align-items:center; gap:10px; }
.engine .eg-logo{ width:30px; height:30px; }
.engine .eg-name{ font-family:var(--font-display); font-weight:700; font-size:15px; }
.engine .eg-name b{ color:var(--cyan); }
.engine .eg-row{ display:flex; justify-content:space-between; align-items:center; margin-top:13px; font-family:var(--font-mono); font-size:10.5px; color:var(--txt-d-mut); }
.engine .eg-bar{ height:5px; border-radius:3px; background:rgba(255,255,255,.07); overflow:hidden; margin-top:6px; }
.engine .eg-bar i{ display:block; height:100%; border-radius:3px; background:linear-gradient(90deg, var(--cyan), var(--cyan-2)); width:0; animation:egfill 2.6s ease-in-out infinite alternate; }
@keyframes egfill{ from{ width:24%; } to{ width:92%; } }
.engine .eg-stat{ font-family:var(--font-mono); color:var(--cyan); }

@media (prefers-reduced-motion: reduce){
  .flow-svg path.live{ animation:none; } .engine .eg-bar i{ animation:none; width:72%; }
}

/* ---------- tech marquee strip ---------- */
.strip{ border-block:1px solid var(--line-light); background:var(--bg-light-2); padding:34px 0; overflow:hidden; }
.strip .lbl{ text-align:center; font-family:var(--font-mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:var(--txt-l-mut); margin-bottom:22px; }
.marquee{ display:flex; gap:0; overflow:hidden; -webkit-mask-image:linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image:linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track{ display:flex; gap:54px; padding-right:54px; flex:none; animation:marq 28s linear infinite; }
@keyframes marq{ to{ transform:translateX(-100%); } }
.marquee:hover .marquee-track{ animation-play-state:paused; }
.tech-word{ display:inline-flex; align-items:center; gap:10px; font-family:var(--font-display); font-weight:600; font-size:21px; color:var(--ink-700); opacity:.62; white-space:nowrap; transition:opacity .2s, color .2s; }
.tech-word:hover{ opacity:1; color:var(--ink-900); }
.tech-word .glyph{ width:26px; height:26px; border-radius:7px; display:grid; place-items:center; background:#fff; border:1px solid var(--line-light); color:var(--cyan-deep); }
.tech-word .glyph svg{ width:15px; height:15px; }
@media (prefers-reduced-motion: reduce){ .marquee-track{ animation:none; } }