:root{--paper:#f7f5ef;--ink:#0a0a0a;--muted:#625e57;--line:rgba(10,10,10,.14);--white:#fff;--accent:#2237a8;--ease:cubic-bezier(.16,1,.3,1)}*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--paper)}body{margin:0;overflow-x:hidden;color:var(--ink);background:radial-gradient(circle at 12% 4%,rgba(255,255,255,.98),transparent 24rem),radial-gradient(circle at 92% 10%,rgba(211,219,255,.72),transparent 28rem),linear-gradient(180deg,#fbfaf5,var(--paper));font-family:Geist,"Avenir Next",system-ui,sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit}.shell{width:min(1180px,calc(100% - 40px));margin:0 auto}.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px 0}.brand{display:inline-flex;align-items:center;gap:11px;font-weight:850;letter-spacing:-.03em;text-decoration:none;font-size:1.18rem}.brand 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0;color:rgba(255,255,255,.68);font-size:1.16rem}.cta-panel .button{background:var(--white);color:var(--ink);border-color:var(--white)}.cta-panel .button.secondary{background:transparent;color:var(--white)}footer{padding:48px 0 62px;border-top:1px solid var(--line);color:var(--muted)}.footer-row{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}.footer-links{display:flex;gap:18px;flex-wrap:wrap}@media(max-width:850px){.hero{min-height:auto;padding:56px 0 88px}.hero-grid,.chapter{grid-template-columns:1fr}.hero-mark{min-height:240px}.chapter-title{position:relative;top:auto}.card-grid{grid-template-columns:1fr}.accordion{display:grid}.accordion article:hover,.accordion article:focus-within{transform:none}.content-section{padding:88px 0}}@media(max-width:600px){.shell{width:min(100% - 24px,1180px)}.nav{align-items:flex-start}.nav-links{gap:10px;font-size:.88rem}.hero h1{font-size:clamp(2.9rem,15vw,4.8rem)}.hero-mark{display:none}.cta-panel{border-radius:28px}.footer-row{display:grid}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.marquee-track{animation:none}*{transition-duration:1ms!important}}