/* Rodin Academy — design system. Tokens mirror brand/BRAND.md. */
:root {
  --bg: #07070C;
  --bg-elev: #0E0E18;
  --bg-elev-2: #14141F;
  --ink: #F2F4F8;
  --muted: #9AA4B2;
  --muted-dim: #6B7280;
  --cyan: #19D3F3;
  --blue: #2E7BEF;
  --indigo: #3A2BD8;
  --violet: #8B3CF0;
  --mint: #34E0B8;
  --line: rgba(255,255,255,0.08);
  --line-strong: rgba(255,255,255,0.16);
  --grad: linear-gradient(135deg, #19D3F3 0%, #2E7BEF 45%, #8B3CF0 100%);
  --grad-soft: linear-gradient(135deg, rgba(25,211,243,0.14), rgba(139,60,240,0.14));
  --maxw: 1140px;
  --r: 16px;
  --r-lg: 24px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow: 0 24px 60px -24px rgba(0,0,0,0.7);
  --glow: 0 0 60px -12px rgba(46,123,239,0.55);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* Ambient background glow */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(900px 600px at 78% -8%, rgba(139,60,240,0.16), transparent 60%),
    radial-gradient(800px 600px at 10% 0%, rgba(25,211,243,0.12), transparent 55%),
    radial-gradient(1000px 800px at 50% 110%, rgba(46,123,239,0.10), transparent 60%);
  pointer-events: none;
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12.5px; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--cyan); opacity: .7; }
.grad-text {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.muted { color: var(--muted); }
.center { text-align: center; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 24px; border-radius: 999px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s;
  white-space: nowrap;
}
.btn-primary { background: var(--grad); color: #05060a; box-shadow: var(--glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 80px -10px rgba(46,123,239,0.8); }
.btn-ghost { border-color: var(--line-strong); color: var(--ink); background: rgba(255,255,255,0.02); }
.btn-ghost:hover { border-color: var(--cyan); transform: translateY(-2px); }
.btn-lg { padding: 16px 30px; font-size: 16px; }

/* Header / nav */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(7,7,12,0.72);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.brand { display: flex; align-items: center; gap: 12px; font-family: 'Space Grotesk', sans-serif; }
.brand img { width: 38px; height: 38px; border-radius: 9px; }
.brand-name { font-weight: 600; font-size: 18px; letter-spacing: 0.02em; }
.brand-name b { font-weight: 700; }
.brand-name span { color: var(--muted); font-weight: 400; letter-spacing: 0.22em; font-size: 12px; text-transform: uppercase; display: block; margin-top: -2px; }
.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links a { font-size: 14.5px; color: var(--muted); transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-toggle { display: none; background: none; border: 0; color: var(--ink); cursor: pointer; }

/* Hero */
.hero { padding: 96px 0 72px; position: relative; }
.hero h1 { font-size: clamp(40px, 6.4vw, 76px); margin: 22px 0 22px; max-width: 16ch; }
.hero p.lede { font-size: clamp(17px, 2vw, 21px); color: var(--muted); max-width: 56ch; }
.hero .cta-row { display: flex; gap: 14px; margin-top: 36px; flex-wrap: wrap; }
.hero-meta { display: flex; gap: 28px; margin-top: 48px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
.hero-meta b { color: var(--ink); font-family: 'Space Grotesk', sans-serif; }

/* Sections */
section { padding: 80px 0; }
.section-head { max-width: 60ch; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(30px, 4vw, 46px); margin: 16px 0 14px; }
.section-head p { color: var(--muted); font-size: 18px; }

/* Cards / grid */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: linear-gradient(180deg, var(--bg-elev), var(--bg));
  border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 32px; transition: transform .3s var(--ease), border-color .3s;
}
.card:hover { transform: translateY(-4px); border-color: var(--line-strong); }
.card h3 { font-size: 22px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15.5px; }
.card .ico {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center;
  background: var(--grad-soft); border: 1px solid var(--line); margin-bottom: 20px; font-size: 22px;
}
.pillar-list { list-style: none; margin-top: 18px; display: flex; flex-direction: column; gap: 12px; }
.pillar-list li { display: flex; gap: 12px; align-items: flex-start; color: var(--ink); font-size: 15.5px; }
.pillar-list li::before { content: ""; flex: none; width: 8px; height: 8px; margin-top: 8px; border-radius: 3px; background: var(--grad); }

/* Two-up feature */
.feature-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.feature-2 .card { padding: 40px; }
.tag { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line-strong); color: var(--cyan); margin-bottom: 18px; }
.tag.muscle { color: var(--violet); }

/* Quote / metaphor band */
.band {
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--grad-soft); padding: 56px; text-align: center;
}
.band blockquote { font-family: 'Space Grotesk', sans-serif; font-size: clamp(22px, 3vw, 32px); line-height: 1.3; max-width: 24ch; margin: 0 auto; letter-spacing: -0.02em; }
.band cite { display: block; margin-top: 22px; color: var(--muted); font-style: normal; font-size: 14px; letter-spacing: .1em; text-transform: uppercase; }

/* CTA band */
.cta-band { text-align: center; padding: 88px 0; }
.cta-band h2 { font-size: clamp(32px, 5vw, 56px); margin-bottom: 18px; }
.cta-band p { color: var(--muted); font-size: 19px; max-width: 50ch; margin: 0 auto 34px; }

/* Waitlist form */
.waitlist { display: flex; gap: 12px; max-width: 480px; margin: 0 auto; flex-wrap: wrap; justify-content: center; }
.waitlist input {
  flex: 1; min-width: 240px; padding: 15px 20px; border-radius: 999px;
  background: var(--bg-elev); border: 1px solid var(--line-strong); color: var(--ink); font-size: 15px; font-family: inherit;
}
.waitlist input:focus { outline: none; border-color: var(--cyan); }
.form-note { margin-top: 16px; font-size: 13px; color: var(--muted-dim); }
.form-success { color: var(--mint); font-weight: 600; margin-top: 18px; display: none; }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q { width: 100%; text-align: left; background: none; border: 0; color: var(--ink); cursor: pointer;
  padding: 26px 0; font-size: 19px; font-weight: 600; font-family: 'Space Grotesk', sans-serif;
  display: flex; justify-content: space-between; gap: 20px; align-items: center; }
.faq-q .plus { color: var(--cyan); font-size: 26px; transition: transform .3s var(--ease); flex: none; }
.faq-q[aria-expanded="true"] .plus { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); }
.faq-a p { padding-bottom: 26px; color: var(--muted); max-width: 70ch; }

/* About / prose */
.prose { max-width: 70ch; }
.prose p { margin-bottom: 22px; color: var(--muted); font-size: 18px; }
.prose p.lead { color: var(--ink); font-size: 22px; }
.prose h2 { font-size: 30px; margin: 44px 0 18px; }

/* Steps */
.steps { counter-reset: step; display: grid; gap: 20px; }
.step { display: flex; gap: 20px; align-items: flex-start; }
.step .num { counter-increment: step; flex: none; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--grad-soft); border: 1px solid var(--line); font-family: 'Space Grotesk', sans-serif; font-weight: 700; }
.step .num::before { content: counter(step); }
.step h3 { font-size: 19px; margin-bottom: 6px; }
.step p { color: var(--muted); font-size: 15.5px; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 56px 0 40px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 40px; }
.footer-grid h4 { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted-dim); margin-bottom: 16px; font-family: 'Inter'; font-weight: 600; }
.footer-grid a { display: block; color: var(--muted); font-size: 14.5px; margin-bottom: 10px; transition: color .2s; }
.footer-grid a:hover { color: var(--ink); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; border-top: 1px solid var(--line); color: var(--muted-dim); font-size: 13px; flex-wrap: wrap; gap: 14px; }
.social-row { display: flex; gap: 14px; }
.social-row a { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line); display: grid; place-items: center; color: var(--muted); transition: all .2s; }
.social-row a:hover { color: var(--ink); border-color: var(--cyan); transform: translateY(-2px); }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .feature-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; position: absolute; top: 70px; left: 0; right: 0; flex-direction: column; background: var(--bg-elev); padding: 20px 24px; border-bottom: 1px solid var(--line); gap: 18px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
}
@media (max-width: 560px) {
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .band { padding: 36px 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  section { padding: 60px 0; }
}
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } * { scroll-behavior: auto; } }