body{font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;max-width:820px;margin:0 auto;padding:24px;color:#1a1a1a;line-height:1.6;background:#fff}
header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #e5e5e5;padding-bottom:12px;margin-bottom:24px;flex-wrap:wrap;gap:8px}
header .brand{font-weight:700;font-size:1.2em}
nav a{margin-left:16px;color:#065fd4;text-decoration:none}
nav a:hover{text-decoration:underline}
h1{font-size:1.8em;margin-bottom:4px}
h2{font-size:1.25em;margin-top:28px}
a{color:#065fd4}
.yt{display:inline-flex;align-items:center;gap:10px;border:1px solid #e5e5e5;border-radius:8px;padding:12px 16px;margin:16px 0}
.yt .play{display:inline-block;width:44px;height:31px;background:#FF0000;border-radius:8px;position:relative}
.yt .play:after{content:"";position:absolute;left:17px;top:9px;border-style:solid;border-width:6.5px 0 6.5px 12px;border-color:transparent transparent transparent #fff}
.yt strong{font-size:1.05em}
.links a{display:inline-block;margin:6px 12px 6px 0;padding:8px 14px;border:1px solid #065fd4;border-radius:6px;text-decoration:none}
.muted{color:#606060;font-size:.92em}
footer{border-top:1px solid #e5e5e5;margin-top:40px;padding-top:12px;color:#606060;font-size:.9em}
code{background:#f2f2f2;padding:1px 5px;border-radius:4px}
ul li{margin:4px 0}