:root{color-scheme:dark;--bg:#12161c;--fg:#eef3f8;--muted:#b7c2ce;--card:#1b222b;--border:#334155;--accent:#7ec8ff;--ink:#102030;--ok:#8ee6ab;--err:#ff8d8d}*{box-sizing:border-box}body,html{margin:0;background:var(--bg);color:var(--fg);font-family:Georgia,serif}a{color:var(--accent)}.shell{margin:0 auto;max-width:48rem;padding:1.5rem}header.top{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;flex-wrap:wrap}h1{font-size:1.7rem;margin:0 0 .3rem}h2{font-size:1.2rem;margin:0 0 .5rem}.lede{color:var(--muted)}nav.tabs{display:flex;gap:.85rem;flex-wrap:wrap;margin:1rem 0}.card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:1rem 1.2rem;margin:1rem 0}.row{display:flex;justify-content:space-between;gap:1rem;align-items:baseline;flex-wrap:wrap}.button,button{background:var(--accent);color:var(--ink);border:0;padding:.5rem .9rem;border-radius:4px;cursor:pointer;font:inherit;font-weight:600;text-decoration:none;display:inline-block}.button.secondary,button.secondary{background:transparent;color:var(--accent);border:1px solid var(--accent)}label{display:block;margin:.6rem 0 .2rem;color:var(--muted)}input,select{width:100%;max-width:24rem;padding:.4rem .5rem;border-radius:4px;border:1px solid var(--border);background:#0d1117;color:var(--fg);font:inherit}.mono,code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.82rem}.ok{color:var(--ok)}.error{color:var(--err)}ul.plain{padding-left:1.1rem}.verified{border-left:3px solid var(--ok);padding-left:.8rem}