/* ========== Tokens ========== */
:root {
  --bg: #05060a;
  --bg-2: #0a0c14;
  --surface: rgba(255, 255, 255, 0.03);
  --border: rgba(255, 255, 255, 0.08);
  --text: #eef0f6;
  --muted: #8a90a6;
  --cyan: #22d3ee;
  --violet: #8b5cf6;
  --pink: #f472b6;
  --grad: linear-gradient(100deg, var(--cyan), var(--violet) 50%, var(--pink));
  --radius: 20px;
  --max: 1200px;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.05; letter-spacing: -0.03em; margin: 0; }
p { margin: 0; }
::selection { background: var(--violet); color: #fff; }

.grad-text {
  background: var(--grad);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: grad-shift 6s ease-in-out infinite;
}
@keyframes grad-shift { 50% { background-position: 100% center; } }

.mono, .label, .eyebrow, .num { font-family: var(--font-mono); }

/* ========== Cursor glow ========== */
.cursor-glow {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background: radial-gradient(600px circle at var(--cx, 50%) var(--cy, -20%), rgba(139, 92, 246, 0.09), transparent 40%);
}

/* ========== Nav ========== */
.nav {
  position: fixed; top: 16px; left: 50%; transform: translateX(-50%);
  width: min(var(--max), calc(100% - 32px));
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 10px 10px 10px 20px;
  border: 1px solid var(--border); border-radius: 999px;
  background: rgba(10, 12, 20, 0.55);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  z-index: 50;
  transition: background .3s, border-color .3s;
}
.nav.scrolled { background: rgba(10, 12, 20, 0.85); border-color: rgba(139, 92, 246, 0.25); }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; letter-spacing: .18em; font-size: 15px; }
.brand-mark { width: 28px; height: 28px; }
.nav-links { display: flex; gap: 32px; font-size: 14px; color: var(--muted); }
.nav-links a { position: relative; transition: color .2s; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 1px;
  background: var(--grad); transform: scaleX(0); transition: transform .3s;
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { transform: scaleX(1); }

/* ========== Buttons ========== */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px; border-radius: 999px;
  font-weight: 600; font-size: 15px;
  transition: transform .2s, box-shadow .3s, background .3s;
}
.btn:hover { transform: translateY(-2px); }
.btn-sm { padding: 10px 18px; font-size: 14px; }
.btn-lg { padding: 18px 34px; font-size: 18px; }
.btn-glow {
  color: #fff;
  background: var(--grad); background-size: 200% auto;
  box-shadow: 0 0 0 1px rgba(255,255,255,.1) inset, 0 8px 30px -8px rgba(139, 92, 246, .7);
}
.btn-glow:hover { background-position: 100% center; box-shadow: 0 0 0 1px rgba(255,255,255,.2) inset, 0 12px 40px -6px rgba(244, 114, 182, .7); }
.btn-ghost { border: 1px solid var(--border); background: var(--surface); }
.btn-ghost:hover { border-color: rgba(255,255,255,.25); }

/* ========== Hero ========== */
.hero {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: grid; place-items: center;
  padding: 140px 16px 100px;
  overflow: hidden;
}
#neural { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 75%);
}
.hero::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 200px;
  background: linear-gradient(transparent, var(--bg)); pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; max-width: 980px; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 16px; border-radius: 999px;
  border: 1px solid rgba(34, 211, 238, .25); background: rgba(34, 211, 238, .06);
  color: var(--cyan); font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
}
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 0 rgba(34,211,238,.7); animation: pulse 2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 10px rgba(34,211,238,0); } 100% { box-shadow: 0 0 0 0 rgba(34,211,238,0); } }
.hero-title { font-size: clamp(48px, 9vw, 120px); font-weight: 700; margin: 28px 0 28px; }
.scramble { display: inline-block; color: var(--text); }
.hero-sub { max-width: 640px; margin: 0 auto; color: var(--muted); font-size: clamp(17px, 2vw, 20px); }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 40px; }
.scroll-cue {
  position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%); z-index: 2;
  width: 26px; height: 42px; border: 1px solid rgba(255,255,255,.25); border-radius: 14px;
}
.scroll-cue span { position: absolute; top: 8px; left: 50%; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--text); animation: scroll 1.8s infinite; }
@keyframes scroll { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

/* ========== Ticker ========== */
.ticker {
  position: relative; z-index: 1; overflow: hidden;
  border-block: 1px solid var(--border); background: var(--bg-2);
  padding: 22px 0;
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.ticker-track { display: flex; gap: 40px; width: max-content; animation: marquee 40s linear infinite; font-family: var(--font-display); font-size: 22px; font-weight: 500; white-space: nowrap; }
.ticker-track i { font-style: normal; color: var(--violet); }
.ticker:hover .ticker-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ========== Sections ========== */
.section { position: relative; z-index: 1; width: min(var(--max), calc(100% - 32px)); margin: 0 auto; padding: 140px 0 0; }
.section-head { margin-bottom: 56px; }
.label { color: var(--violet); font-size: 13px; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 18px; }
.section h2 { font-size: clamp(38px, 6vw, 72px); font-weight: 700; }

/* Glow cards with cursor-tracked border light */
.glow-card {
  position: relative; padding: 36px; border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.01));
  border: 1px solid var(--border);
  overflow: hidden; isolation: isolate;
  transition: transform .3s ease, border-color .3s;
}
.glow-card::before {
  content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 50%), rgba(139, 92, 246, .18), transparent 45%);
  opacity: 0; transition: opacity .3s;
}
.glow-card::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px; pointer-events: none;
  background: radial-gradient(300px circle at var(--mx, 50%) var(--my, 50%), rgba(34, 211, 238, .8), transparent 50%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .3s;
}
.glow-card:hover::before, .glow-card:hover::after { opacity: 1; }
.glow-card h3 { font-size: 26px; margin-bottom: 12px; }
.glow-card p { color: var(--muted); }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 28px;
  background: linear-gradient(135deg, rgba(34,211,238,.15), rgba(139,92,246,.15));
  border: 1px solid rgba(139, 92, 246, .3);
}
.card-icon svg { width: 26px; height: 26px; fill: none; stroke: var(--cyan); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.num { display: block; color: var(--cyan); font-size: 13px; margin-bottom: 48px; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.split .glow-card { padding: 48px; min-height: 320px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.tilt { transform-style: preserve-3d; will-change: transform; }

/* Featured full-width card (Training) */
.featured {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center;
  padding: 56px;
  border-color: rgba(139, 92, 246, .3);
  background:
    radial-gradient(ellipse 60% 80% at 0% 0%, rgba(34, 211, 238, .10), transparent 60%),
    radial-gradient(ellipse 60% 80% at 100% 100%, rgba(244, 114, 182, .10), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.01));
}
.featured .num { margin-bottom: 24px; }
.featured h3 { font-size: clamp(30px, 3.6vw, 44px); margin-bottom: 20px; }
.featured-copy p { font-size: 18px; }
.featured-topics { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.topic-group { padding: 22px; border-radius: 16px; border: 1px solid var(--border); background: rgba(5, 6, 10, .5); }
.topic-head { font-family: var(--font-display); font-weight: 700; font-size: 18px; color: var(--text) !important; margin-bottom: 12px; }
.topic-head span { color: var(--pink); margin-right: 6px; font-size: 13px; }
.topic-group ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; font-size: 15px; color: var(--muted); }
.topic-group li { padding-left: 16px; position: relative; }
.topic-group li::before { content: ""; position: absolute; left: 0; top: .65em; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.formats { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 10px; }
.formats span { padding: 8px 16px; border-radius: 999px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--cyan); border: 1px solid rgba(34, 211, 238, .3); background: rgba(34, 211, 238, .06); }

/* ========== Bench ========== */
.bench { padding-top: 180px; text-align: center; }
.bench-orb {
  position: absolute; left: 50%; top: 55%; width: 720px; height: 720px; max-width: 120vw; max-height: 120vw;
  transform: translate(-50%, -50%); border-radius: 50%; z-index: -1;
  background: conic-gradient(from 0deg, var(--cyan), var(--violet), var(--pink), var(--cyan));
  filter: blur(120px); opacity: .22;
  animation: spin 18s linear infinite;
}
@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }
.bench-inner { max-width: 900px; margin: 0 auto; }
.mega { font-size: clamp(52px, 10vw, 136px) !important; }
.shimmer { background-image: linear-gradient(100deg, var(--cyan), var(--violet) 30%, #fff 50%, var(--pink) 70%, var(--cyan)); background-size: 300% auto; animation: shimmer 5s linear infinite; }
@keyframes shimmer { to { background-position: -300% center; } }
.bench-sub { max-width: 620px; margin: 32px auto 0; color: var(--muted); font-size: 19px; }
.traits { list-style: none; padding: 0; margin: 48px auto 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.traits li { padding: 12px 20px; border-radius: 999px; border: 1px solid var(--border); background: rgba(10,12,20,.6); backdrop-filter: blur(8px); font-size: 15px; }
.traits span { color: var(--pink); margin-right: 6px; }

/* ========== Timeline ========== */
.timeline { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; position: relative; }
.timeline::before { content: ""; position: absolute; top: 22px; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--violet), var(--cyan), transparent); }
.timeline li { position: relative; padding-top: 64px; counter-increment: step; }
.timeline li::before {
  content: "0" counter(step); position: absolute; top: 0; left: 0;
  width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--font-mono); font-size: 13px; color: var(--cyan);
  background: var(--bg); border: 1px solid rgba(34, 211, 238, .5);
  box-shadow: 0 0 24px rgba(34, 211, 238, .35);
}
.step { display: block; font-family: var(--font-display); font-size: 24px; font-weight: 700; margin-bottom: 10px; }
.timeline p { color: var(--muted); font-size: 16px; }

/* ========== CTA ========== */
.cta { padding-bottom: 140px; }
.cta-card { position: relative; text-align: center; padding: 100px 32px; border-radius: 32px; background: var(--bg-2); overflow: hidden; isolation: isolate; }
.cta-border {
  position: absolute; inset: -50%; z-index: -2;
  background: conic-gradient(from 0deg, transparent 0 70%, var(--cyan), var(--violet), var(--pink), transparent);
  animation: rotate 6s linear infinite;
}
.cta-card::after { content: ""; position: absolute; inset: 1.5px; border-radius: 31px; background: radial-gradient(ellipse at top, #141228, var(--bg-2) 60%); z-index: -1; }
@keyframes rotate { to { transform: rotate(360deg); } }
.cta-card p { color: var(--muted); max-width: 520px; margin: 24px auto 40px; font-size: 19px; }

/* ========== Footer ========== */
.footer { position: relative; z-index: 1; width: min(var(--max), calc(100% - 32px)); margin: 0 auto; padding: 32px 0 48px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }

/* ========== Reveal on scroll ========== */
.reveal { opacity: 0; transform: translateY(32px); filter: blur(6px); transition: opacity .9s cubic-bezier(.2,.7,.2,1), transform .9s cubic-bezier(.2,.7,.2,1), filter .9s; }
.reveal.in { opacity: 1; transform: none; filter: none; }
.grid .reveal:nth-child(3n+2), .timeline .reveal:nth-child(2), .split .reveal:nth-child(2) { transition-delay: .1s; }
.grid .reveal:nth-child(3n), .timeline .reveal:nth-child(3) { transition-delay: .2s; }
.timeline .reveal:nth-child(4) { transition-delay: .3s; }

/* ========== Responsive ========== */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .grid { grid-template-columns: 1fr 1fr; }
  .timeline { grid-template-columns: 1fr 1fr; row-gap: 48px; }
  .timeline::before { display: none; }
  .featured { grid-template-columns: 1fr; gap: 32px; padding: 40px; }
}
@media (max-width: 640px) {
  .split, .grid, .timeline { grid-template-columns: 1fr; }
  .split .glow-card, .glow-card { padding: 28px; min-height: 0; }
  .num { margin-bottom: 24px; }
  .featured-topics { grid-template-columns: 1fr; }
  .section { padding-top: 100px; }
  .cta-card { padding: 72px 20px; }
  .btn-lg { font-size: 16px; padding: 16px 24px; }
}

/* ========== Reduced motion ========== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; filter: none; }
}