:root{--paper:#f7f1e6;--ink:#172b37;--muted:#50646d;--coral:#ae3931;--cyan:#136e83;--line:#c8cfc8;--panel:#fffdf8;--steel:#324b58;--gold:#dfb054;color-scheme:light}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}
a{color:var(--cyan);text-underline-offset:4px}
a:hover{color:var(--coral)}
a:focus-visible{outline:3px solid var(--cyan);outline-offset:5px}
h1,h2,h3{line-height:1.1;letter-spacing:-.035em}
h1{font-size:clamp(2.8rem,8vw,5rem);margin:.3em 0}
h2{font-size:clamp(1.7rem,4vw,2.5rem)}
h3{font-size:1.25rem}
p{max-width:68ch}
header,main,footer{width:min(1120px,calc(100% - 40px));margin:auto}
header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:26px 0;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.04em;text-decoration:none;color:var(--ink)}
.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:13px;background:var(--ink);color:var(--paper);font-size:28px}
nav{display:flex;flex-wrap:wrap;gap:22px;font-size:.95rem}
nav a{color:var(--ink)}
.skip{position:absolute;left:20px;top:-80px;background:var(--panel);padding:12px}
.skip:focus{top:10px}
.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:70px;align-items:center;padding:70px 0}
.eyebrow{font-size:.8rem;text-transform:uppercase;letter-spacing:.13em;font-weight:750;color:var(--muted)}
.intro{font-size:1.15rem;color:var(--muted)}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0}
.button{display:inline-flex;min-height:48px;align-items:center;padding:12px 20px;border:1px solid var(--ink);border-radius:10px;text-decoration:none;font-weight:700;color:var(--paper);background:var(--ink)}
.button:hover{background:var(--coral);color:white}
.button.secondary{background:transparent;color:var(--ink)}
.illustration{margin:0}
.arena{aspect-ratio:3/4;background:var(--ink);border-radius:28px;border:10px solid var(--panel);box-shadow:0 15px 35px #172b3720;padding:14px}
.arena svg{display:block;width:100%;height:100%}
figcaption{color:var(--muted);font-size:.83rem;margin-top:14px;text-align:center}
.section{padding:42px 0;border-top:1px solid var(--line)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--panel);padding:26px;border:1px solid var(--line);border-radius:16px}
.card p{color:var(--muted)}
.number{font-size:.8rem;font-weight:800;color:var(--coral);letter-spacing:.08em}
.callout{padding:24px 28px;border-left:4px solid var(--cyan);background:var(--panel);border-radius:0 12px 12px 0;margin:32px 0}
.prose{max-width:820px;margin:auto;padding:56px 0}
.prose h1{font-size:clamp(2.4rem,6vw,4.2rem)}
.prose h2{font-size:1.6rem;margin-top:2em}
.prose ul{padding-left:24px}
.prose li{margin:8px 0}
.prose .eyebrow{margin-bottom:0}
.meta{color:var(--muted);font-size:.9rem}
.toc{display:flex;flex-wrap:wrap;gap:8px 20px;padding:20px 0;border-block:1px solid var(--line)}
details{padding:20px 0;border-bottom:1px solid var(--line)}
summary{font-weight:700;cursor:pointer;min-height:44px;display:list-item}
footer{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding:32px 0;margin-top:40px;border-top:1px solid var(--line);font-size:.86rem;color:var(--muted)}
footer p{margin:0}
@media(max-width:760px){header{align-items:flex-start;flex-direction:column;gap:16px}
.hero{grid-template-columns:1fr;gap:36px;padding:42px 0}
.illustration{max-width:390px;margin:auto;width:100%}
.cards{grid-template-columns:1fr}
.prose{padding:34px 0}
nav{gap:16px}
.actions .button{flex:1;justify-content:center}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
}
@media print{header,footer,.toc,.actions,.skip{display:none}
body{background:white;color:black}
.prose{padding:0;max-width:none}
a{color:black}
.callout{border:1px solid #888}
}

.brand-art{margin:34px 0}
.brand-art img{width:100%;height:auto;display:block;border-radius:16px;border:1px solid var(--line)}