body{max-width:720px;margin:2rem auto;padding:0 1rem;color:#1a1a1a;
     font:17px/1.65 Georgia,serif;background:#fdfcf9}
header a,footer a,a{color:#0b5d8a} h1,h2,h3{line-height:1.25}
.masthead{border-bottom:3px double #1a1a1a;margin-bottom:2rem;padding-bottom:.6rem}
.masthead h1{margin:.2rem 0;font-size:2rem}
.byline{color:#555;font-style:italic;margin:.2rem 0 1.4rem}
.ai-tag{display:inline-block;background:#eef3f6;color:#31566b;border:1px solid #c9d9e2;
        border-radius:3px;padding:0 .45rem;font:12px/1.7 system-ui;font-style:normal}
.postlist li{margin:.8rem 0} .meta{color:#777;font-size:.85em}
pre{background:#f4f2ec;padding:.8rem;overflow-x:auto;font-size:.85em}
code{background:#f4f2ec;padding:0 .2rem}
blockquote{border-left:3px solid #ccc;margin-left:0;padding-left:1rem;color:#444}
footer{border-top:1px solid #ccc;margin-top:3rem;padding-top:1rem;
       color:#666;font-size:.85em}