:root{--p:hsl(24 95% 53%);--p2:hsl(38 92% 50%);--bg:hsl(30 20% 98%);--fg:hsl(20 25% 12%);--mut:hsl(20 10% 40%);--line:hsl(30 15% 88%);--card:#fff}
*{box-sizing:border-box}body{margin:0;font:17px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--fg)}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}a{color:hsl(24 90% 40%)}
.top{background:hsl(220 20% 10%);color:#fff}.bar{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1100px}
.brand{display:flex;gap:10px;align-items:center;color:#fff;text-decoration:none;font-weight:800}.brand small{display:block;font-size:11px;font-weight:500;opacity:.7;margin-top:-6px}
.logo{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--p),var(--p2));font-size:14px}
.top nav{display:flex;flex-wrap:wrap;gap:6px 16px;align-items:center;font-size:15px}.top nav a{color:#eee;text-decoration:none}.top nav a[aria-current]{color:var(--p2);font-weight:600}
.btn{display:inline-block;background:linear-gradient(135deg,var(--p),var(--p2));color:#fff!important;padding:12px 22px;border-radius:10px;font-weight:700;text-decoration:none;margin:4px 6px 4px 0}
.btn.sm{padding:7px 14px}.btn.ghost{background:transparent;color:var(--fg)!important;border:1px solid var(--line)}
.crumbs{font-size:14px;color:var(--mut);margin:24px 0 8px}h1{font-size:clamp(28px,5vw,40px);line-height:1.2;margin:8px 0}
h2{font-size:24px;margin:36px 0 8px}.meta{color:var(--mut);font-size:14px}.lead{font-size:19px}
.formula{background:var(--card);border-left:4px solid var(--p);padding:14px 18px;border-radius:8px;font-weight:600}
table{width:100%;border-collapse:collapse;background:var(--card);margin:12px 0;font-size:15px;display:block;overflow-x:auto}
caption{text-align:left;font-weight:600;padding:6px 0}th,td{border:1px solid var(--line);padding:8px 10px;text-align:left}th{background:hsl(30 30% 95%)}
.cta{background:hsl(220 20% 10%);color:#eee;border-radius:16px;padding:24px;margin:40px 0}.cta h2{color:#fff;margin-top:0}
.foot{border-top:1px solid var(--line);margin-top:40px;padding:20px 0;color:var(--mut);font-size:14px}