*{box-sizing:border-box}body{font-family:system-ui,-apple-system,Segoe UI,Arial,sans-serif;
line-height:1.6;max-width:760px;margin:0 auto;padding:24px;color:#1a1a1a}
header{border-bottom:2px solid #1a1a1a;padding-bottom:12px;margin-bottom:24px}
nav a{margin-right:16px;color:#0645ad}
footer{border-top:1px solid #ccc;margin-top:40px;padding-top:12px;font-size:.9em;color:#555}
h1{font-size:1.8em}h2{font-size:1.3em;margin-top:32px}
img{max-width:100%;height:auto}
.breadcrumb{font-size:.85em;color:#666;margin-bottom:16px}