*{box-sizing:border-box}body{margin:0;background:#ffffff;color:#222;font-family:ui-monospace, 'SFMono-Regular', Menlo, monospace;line-height:1.65}
header{border-bottom:1px solid #e3e0da;padding:22px 0}.wrap{max-width:860px;margin:0 auto;padding:0 22px}
.brand{font-size:1.35rem;color:#0f766e;text-decoration:none;font-weight:700}.tag{color:#666;font-size:.92rem;margin-top:2px}
nav{margin-top:14px}nav a{color:#333;margin-right:18px;text-decoration:none;font-size:.95rem}nav a:hover,nav a.on{color:#0f766e;border-bottom:2px solid #0f766e}
main{padding:34px 0 48px}h1{font-size:1.9rem;margin:0 0 18px;color:#0f766e}p{margin:0 0 14px;max-width:640px}
footer{border-top:1px solid #e3e0da;padding:18px 0;color:#777;font-size:.85rem}