:root{--bg:#101719;--panel:#182326;--ink:#EDF4F1;--accent:#62D6B4;--muted:#B7C7C1;--line:#2A3A3D;--max:1240px;--article:760px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 Arial,Helvetica,"Segoe UI",sans-serif}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:3px}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.skip{position:absolute;left:-999px}.skip:focus{left:1rem;top:1rem;background:var(--panel);padding:.5rem .8rem;z-index:9}
.wrap{width:min(100% - 2rem,var(--max));margin:0 auto}
.site-header{border-bottom:1px solid var(--line);padding:1rem 0;position:sticky;top:0;background:rgba(16,23,25,.94);z-index:5}
.nav{display:flex;flex-wrap:wrap;gap:.8rem 1.2rem;justify-content:space-between;align-items:center}
.brand{font-weight:700;color:var(--ink);letter-spacing:.04em}.nav-links{display:flex;flex-wrap:wrap;gap:.7rem 1rem;list-style:none;margin:0;padding:0;font-size:.92rem}.nav-links a{color:var(--muted)}
.hero{display:grid;grid-template-columns:1.35fr .95fr;gap:2rem;padding:2.2rem 0 1.8rem;align-items:start}
.eyebrow{font-family:Consolas,"Courier New",monospace;font-size:.78rem;letter-spacing:.1em;color:var(--accent);margin:0 0 .7rem}
.hero h1{font-size:clamp(2rem,4vw,3rem);line-height:1.12;margin:0 0 .7rem}
.role{color:var(--muted);margin:0 0 1rem}.lede{color:var(--muted);max-width:38rem;margin:0 0 1.3rem}
.cta-row{display:flex;flex-wrap:wrap;gap:.7rem}.btn{display:inline-flex;align-items:center;min-height:44px;padding:.65rem 1rem;border:1px solid var(--accent);font-size:.92rem}
.btn-primary{background:var(--accent);color:#102018;font-weight:700}.btn-secondary{color:var(--accent)}
.id-card{background:var(--panel);border:1px solid var(--line);padding:1rem;display:grid;grid-template-columns:110px 1fr;gap:1rem;align-items:center}
.profile-photo{display:block;width:100%;max-width:100%;height:auto;aspect-ratio:1/1;object-fit:cover;object-position:center;border:1px solid var(--line)}
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:.7rem;margin-top:1rem}
.flow article{background:var(--panel);border:1px solid var(--line);padding:.85rem}.flow .code{font-family:Consolas,monospace;color:var(--accent);font-size:.78rem}.flow h3{margin:.35rem 0;font-size:1rem}.flow p{margin:0;color:var(--muted);font-size:.9rem}
.section{padding:1.8rem 0;border-top:1px solid var(--line)}.section h2{margin:0 0 1rem;font-size:1.4rem}
.archive{display:grid;gap:0}.row{display:grid;grid-template-columns:5.5rem 1fr;gap:1rem;padding:1rem 0;border-top:1px solid var(--line)}
.row:first-child{border-top:0}.code{font-family:Consolas,monospace;color:var(--accent)}.row h3{margin:0 0 .35rem;font-size:1.15rem}.row h3 a{color:var(--ink)}.meta{color:var(--muted);font-size:.88rem}
.table-wrap{overflow:auto;border:1px solid var(--line)}table{width:100%;border-collapse:collapse;min-width:560px;background:var(--panel)}th,td{border-bottom:1px solid var(--line);padding:.75rem .8rem;text-align:left;vertical-align:top}th{color:var(--accent);font-family:Consolas,monospace;font-weight:600;font-size:.85rem}
.panel{background:var(--panel);border:1px solid var(--line);padding:1rem 1.1rem}.formula{font-family:Consolas,monospace;background:#0C1214;border:1px solid var(--line);padding:.85rem 1rem;overflow:auto}
.site-footer{border-top:1px solid var(--line);padding:1.5rem 0 2.3rem;color:var(--muted);font-size:.9rem}
.article-wrap{width:min(100% - 2rem,var(--article));margin:0 auto;padding:1.5rem 0 2.4rem}
.notice{background:#132022;border:1px solid var(--line);padding:.85rem 1rem;margin:1rem 0 1.3rem;font-size:.92rem;color:var(--muted)}
.takeaways{background:var(--panel);border:1px solid var(--line);padding:1rem 1rem 1rem 2rem}.toc{list-style:none;padding:0;margin:0 0 1.3rem}.toc a{color:var(--muted)}.article-wrap h2{margin:1.6rem 0 .65rem;font-size:1.25rem}.related{margin-top:2rem;padding-top:1rem;border-top:1px solid var(--line)}
@media (max-width:900px){.hero,.id-card,.flow,.row{grid-template-columns:1fr}.flow{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.flow{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}