.lhead{background:#121921;padding:1.1rem 0}
.lbar{display:flex;justify-content:space-between;align-items:center;gap:1rem}
.lbar img{height:36px;width:auto;display:block}
.back{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:#C9D3DD;text-decoration:underline;text-underline-offset:3px}
.back:hover{color:#FFFFFF}
.doc{max-width:820px;padding-block:3rem 4rem}
.doc h1{font-size:clamp(2rem,4vw,2.8rem);margin:.8rem 0 .4rem}
.doc .upd{font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;color:var(--dim);margin-bottom:2rem}
.doc h2{font-size:1.25rem;margin:2rem 0 .5rem;letter-spacing:-.02em}
.doc p,.doc li{color:#3A4552;line-height:1.7}
.doc ul{padding-left:1.2rem;margin:.4rem 0}
.doc li{margin-bottom:.35rem}
.doc a{color:var(--arc);text-decoration:underline;text-underline-offset:2px}