:root{--slate:#0c1a24;--panel:#13283a;--wire:#38bdf8;--text:#e5f3fb}
*{box-sizing:border-box}body{margin:0;background:#0c1a24;color:var(--text);font-family:Georgia,"Times New Roman",serif;font-size:18px;line-height:1.7}
h1,h2,h3{font-family:Georgia,"Times New Roman",serif;line-height:1.1}
.os-nav a{font-family:"SFMono-Regular",Menlo,monospace;}
.os-meta{font-family:"SFMono-Regular",Menlo,monospace;}
.fi-card h2{font-family:"SFMono-Regular",Menlo,monospace;}
a{color:#7dd3fc}a:focus-visible{outline:2px solid var(--wire);outline-offset:3px}
.os-skip{position:absolute;left:-9999px}.os-skip:focus{left:1rem;top:1rem;background:#fff;color:#111;padding:.5rem}
.os-top{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem;padding:1.1rem 5vw;border-bottom:1px solid var(--panel)}
.os-brand{color:var(--text);text-decoration:none;font-size:1.35rem}
.os-nav{display:flex;flex-wrap:wrap;gap:.2rem 1.1rem}.os-nav a{color:var(--text);text-decoration:none;font-size:.88rem}.os-nav a[aria-current]{color:var(--wire)}
.os-main{max-width:1000px;margin:0 auto;padding:3rem 5vw}
.os-main h1{font-size:clamp(2.5rem,6.5vw,4.4rem);margin:0 0 1rem}
.os-th{color:#bae6fd}
.fi-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin:2.4rem 0;border:1px solid var(--wire)}
.fi-card{padding:1.3rem 1.2rem}.fi-card+.fi-card{border-left:1px solid var(--wire)}.fi-card h2{font-size:1rem;margin:0 0 .4rem;color:var(--wire);font-weight:400}.fi-card p{margin:0}
.os-box{border:1px solid var(--panel);padding:1.2rem 1.4rem;margin-top:1.3rem;background:var(--panel)}
.os-hold[hidden]{display:none}
.os-foot{border-top:1px solid var(--panel);padding:1.4rem 5vw 2.6rem;font-size:.9rem}.os-foot p{margin:.2rem 0}.os-foot-links{display:flex;gap:1rem;flex-wrap:wrap}
.os-doc section{margin-top:1.8rem}.os-meta{font-size:.85rem;color:#bae6fd}.os-sum{font-size:.95rem;color:#bae6fd;border-left:2px solid var(--wire);padding-left:.8rem}
@media(max-width:720px){.fi-cards{grid-template-columns:1fr}.fi-card+.fi-card{border-left:0;border-top:1px solid var(--wire)}}