:root{--primary:#4F46E5;--primary-hover:#4338CA;--primary-light:#EEF2FF;--ink:#1E293B;--ink-2:#334155;--muted:#586474;--border:#E2E8F0;--bg:#F8FAFC;--white:#fff}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:1rem}
a{color:var(--primary);text-underline-offset:3px}
a:hover{color:var(--primary-hover)}
:focus-visible{outline:3px solid var(--primary);outline-offset:2px;border-radius:3px}
.wrap{max-width:46rem;margin:0 auto;padding:0 16px}
header.site{background:var(--white);border-bottom:1px solid var(--border)}
header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:0 16px}
.brand{display:inline-flex;align-items:center;gap:8px;min-height:44px;font-weight:700;color:var(--ink);text-decoration:none;font-size:1.05rem}
.brand:hover{color:var(--ink)}
nav.top{display:flex;flex-wrap:wrap;gap:0 4px}
nav.top a,footer a{display:inline-flex;align-items:center;min-height:44px;padding:0 8px;color:var(--ink-2);text-decoration:none;font-size:.95rem}
nav.top a:hover,footer a:hover{color:var(--primary);text-decoration:underline}
main{padding:32px 0 48px}
h1{font-size:clamp(1.75rem,4vw + .75rem,2.5rem);line-height:1.2;margin:0 0 16px}
h2{font-size:1.4rem;margin:40px 0 8px;line-height:1.3}
p,li{overflow-wrap:anywhere}
.lead{font-size:1.15rem;color:var(--ink-2)}
.meta{color:var(--muted);font-size:.9rem}
ol,ul{padding-left:1.4rem}
li{margin:6px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 22px;background:var(--primary);color:var(--white);border-radius:8px;font-weight:600;text-decoration:none}
.btn:hover{background:var(--primary-hover);color:var(--white)}
.note{background:var(--primary-light);border-left:4px solid var(--primary);padding:12px 16px;border-radius:4px}
footer{background:var(--white);border-top:1px solid var(--border);padding:16px 0 24px}
footer nav{display:flex;flex-wrap:wrap;gap:0 8px}
footer p{margin:8px 0 0;color:var(--muted);font-size:.875rem}