:root{
  --bg:#f8fafc;--card:#fff;--ink:#0f172a;--muted:#475569;--line:#e2e8f0;--radius:26px;--accent:#0f172a;--accent-soft:#f0f9ff;--max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.72 Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:linear-gradient(180deg,#fafaf9 0%,#f8fafc 45%,#fff 100%)}
a{color:inherit}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
.nav{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0}
.brand{font-weight:800;font-size:24px;letter-spacing:-.03em;text-decoration:none}
.brand small{display:block;font-size:12px;color:var(--muted);font-weight:600;letter-spacing:0}
.nav-links{display:flex;flex-wrap:wrap;gap:10px}
.nav-links a{display:inline-flex;align-items:center;text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:10px 14px;background:#fff;font-size:14px}
.nav-links a.active,.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.hero{padding:58px 0 26px}
.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#64748b;font-weight:800;margin-bottom:10px}
.breadcrumb{font-size:14px;color:#64748b;margin-bottom:12px}
h1{font-size:58px;line-height:1.02;letter-spacing:-.05em;margin:0 0 14px}
h2{font-size:34px;line-height:1.08;letter-spacing:-.03em;margin:0 0 12px}
h3{font-size:24px;line-height:1.15;letter-spacing:-.02em;margin:0 0 10px}
.lead{font-size:20px;color:var(--muted);max-width:860px;margin:0}
.section{padding:28px 0}
.grid{display:grid;gap:18px}
.cards-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.cards-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 1px 2px rgba(15,23,42,.03)}
.card p{margin:10px 0 0;color:var(--muted)}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:11px 16px;background:#fff;color:var(--ink);font-weight:600}
.sky{background:var(--accent-soft);border-color:#bae6fd}
.center-copy{max-width:760px;margin:0 auto;text-align:center}
.search{width:100%;padding:15px 16px;border-radius:18px;border:1px solid #cbd5e1;background:#fafaf9;font-size:15px}
.row{display:grid;gap:22px;grid-template-columns:minmax(0,1fr) 320px}
.sidebar .card{position:sticky;top:84px}
.toc a{display:block;padding:8px 0;color:var(--muted);text-decoration:none}
.table{overflow:hidden;border-radius:var(--radius);border:1px solid var(--line);background:#fff}
.thead,.trow{display:grid;grid-template-columns:190px 1fr 1fr}
.thead{background:#0f172a;color:#fff;font-weight:700}
.thead div,.trow div{padding:16px 18px}
.trow:nth-child(even){background:#fafaf9}
.footer{margin-top:56px;padding:30px 0 70px;border-top:1px solid var(--line)}
.footer p{font-size:14px;color:#64748b;margin:0 0 14px}
.footer-links{display:flex;gap:12px;flex-wrap:wrap}
.kicker{font-size:15px;font-weight:700;color:#0f172a;margin:0 0 8px}
.quiz-q{padding:16px 0;border-top:1px solid var(--line)}
.choice{display:block;width:100%;text-align:left;margin-top:10px;padding:12px 14px;border-radius:16px;border:1px solid var(--line);background:#fff;cursor:pointer}
.choice.correct{border-color:#16a34a;background:#f0fdf4}
.choice.wrong{border-color:#dc2626;background:#fef2f2}
.inline-links a{color:#0f172a;text-underline-offset:2px}
.callout{padding:18px 20px;border-radius:22px;border:1px solid #dbeafe;background:#eff6ff}
@media (max-width:980px){
  .cards-3,.cards-2,.row,.thead,.trow{grid-template-columns:1fr}
  h1{font-size:42px}
  .lead{font-size:18px}
  .sidebar .card{position:static}
}

.bottom-nav{margin-top:28px;display:grid;gap:14px}
.bottom-nav-grid{display:grid;gap:14px;grid-template-columns:repeat(2,minmax(0,1fr))}
.bottom-nav-card{display:block;text-decoration:none;padding:18px 20px;border:1px solid var(--line);border-radius:22px;background:#fff}
.bottom-nav-card span{display:block;color:#64748b;font-size:12px;text-transform:uppercase;letter-spacing:.12em;font-weight:700;margin-bottom:6px}
.bottom-nav-card strong{display:block;font-size:18px;line-height:1.35;color:var(--ink)}
.quiz-help{margin-top:14px;padding:14px 16px;border:1px solid #dbeafe;border-radius:18px;background:#eff6ff;color:#334155}
.quiz-next{display:none;margin-top:18px}
.quiz-next.show{display:block}
.quiz-next .hero-cta{margin-top:0}


.next-steps{display:none;margin-top:24px}
.next-steps.show{display:block}
.legend{display:flex;flex-wrap:wrap;gap:14px;margin:14px 0 22px;color:#5b6473;font-size:14px}
.legend .dot{display:inline-block;width:10px;height:10px;border-radius:999px;margin-right:8px;vertical-align:middle}
.legend .green{background:#1b8f43}
.legend .red{background:#b42318}


.brand-with-logo{display:flex;align-items:center;gap:12px}
.brand-with-logo span{display:flex;flex-direction:column}
@media (max-width: 640px){
  }


.brand-with-logo{display:flex;align-items:center;gap:10px}
.brand-with-logo span{display:flex;flex-direction:column}
.brand-icon{height:20px;width:20px;display:block;border-radius:4px;flex:0 0 auto}
@media (max-width: 640px){
  .brand-icon{height:18px;width:18px}
}