:root{
    --bg:#fbfaf8; --fg:#1c1b1a; --muted:#6b6760; --line:#e7e3dc;
    --accent:#2f6f4f; --accent2:#7a4ea0; --warn:#b4541a; --code:#f1efe9;
    --card:#ffffff; --shadow:0 1px 3px rgba(0,0,0,.06),0 8px 24px rgba(0,0,0,.04);
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{margin:0;background:var(--bg);color:var(--fg);
    font:17px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    -webkit-font-smoothing:antialiased}
  .wrap{max-width:880px;margin:0 auto;padding:0 22px 120px}
  header.hero{padding:64px 0 28px;border-bottom:1px solid var(--line);margin-bottom:34px}
  .kicker{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:700;margin-bottom:14px}
  h1{font-size:38px;line-height:1.12;margin:0 0 14px;letter-spacing:-.02em}
  .sub{font-size:19px;color:var(--muted);margin:0;max-width:680px}
  .meta{margin-top:22px;font-size:14px;color:var(--muted)}
  .meta b{color:var(--fg)}
  h2{font-size:26px;margin:54px 0 14px;letter-spacing:-.01em;padding-top:10px}
  h3{font-size:20px;margin:30px 0 10px}
  p{margin:0 0 16px}
  a{color:var(--accent);text-decoration:none;border-bottom:1px solid rgba(47,111,79,.3)}
  a:hover{border-bottom-color:var(--accent)}
  code{background:var(--code);padding:.12em .4em;border-radius:5px;font:14px/1.4 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
  ul,ol{margin:0 0 16px;padding-left:24px}
  li{margin:6px 0}
  .lead{font-size:18px}
  /* TOC */
  nav.toc{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 24px;margin:0 0 14px;box-shadow:var(--shadow)}
  nav.toc h4{margin:0 0 10px;font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
  nav.toc ol{margin:0;padding-left:20px;columns:2;column-gap:34px}
  nav.toc a{border:none}
  /* callouts */
  .box{border-radius:14px;padding:20px 24px;margin:22px 0;box-shadow:var(--shadow)}
  .insight{background:#eef6f0;border:1px solid #cfe6d8}
  .insight .tag{color:var(--accent)}
  .warn{background:#fdf2ea;border:1px solid #f3d9c4}
  .warn .tag{color:var(--warn)}
  .note{background:#f3eef8;border:1px solid #e0d2ee}
  .note .tag{color:var(--accent2)}
  .tag{font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase;display:block;margin-bottom:8px}
  .box p:last-child{margin-bottom:0}
  /* tables */
  .tablewrap{overflow-x:auto;margin:20px 0}
  table{border-collapse:collapse;width:100%;font-size:15px}
  th,td{text-align:left;padding:11px 13px;border-bottom:1px solid var(--line);vertical-align:top}
  th{background:#f5f2ec;font-size:13px;letter-spacing:.03em;text-transform:uppercase;color:var(--muted)}
  tbody tr:hover{background:#faf8f4}
  td.ok{color:var(--accent);font-weight:600}
  td.no{color:var(--warn);font-weight:600}
  /* path cards */
  .paths{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:22px 0}
  .path{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:var(--shadow)}
  .path h3{margin-top:0}
  .path .badge{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:3px 10px;border-radius:999px;margin-bottom:10px}
  .p1 .badge{background:#f3eef8;color:var(--accent2)}
  .p2 .badge{background:#eef6f0;color:var(--accent)}
  .path ul{padding-left:18px;font-size:15px}
  /* steps */
  .flow{counter-reset:step;list-style:none;padding:0;margin:20px 0}
  .flow li{position:relative;padding:4px 0 16px 46px;margin:0}
  .flow li::before{counter-increment:step;content:counter(step);position:absolute;left:0;top:2px;
    width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;
    display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
  .flow li:not(:last-child)::after{content:"";position:absolute;left:14px;top:34px;bottom:2px;width:2px;background:var(--line)}
  .schema{background:#1c1b1a;color:#e8e6e1;border-radius:12px;padding:16px 20px;margin:18px 0;
    font:14.5px/1.7 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;overflow-x:auto}
  .schema .ctx{color:#7fd1a2}.schema .q{color:#c9a0ec}.schema .a{color:#f0a868}
  .refs{font-size:14.5px}
  .refs li{margin:9px 0}
  .src-tag{font-size:11px;font-weight:700;color:var(--muted);background:#efece5;padding:2px 7px;border-radius:5px;margin-left:6px;letter-spacing:.04em}
  hr{border:none;border-top:1px solid var(--line);margin:48px 0}
  .footer{color:var(--muted);font-size:14px;margin-top:40px}
  @media(max-width:680px){.paths{grid-template-columns:1fr}nav.toc ol{columns:1}h1{font-size:30px}}

/* ============ site additions (landing + nav) ============ */
.site-bar{display:flex;justify-content:space-between;align-items:center;
  padding:18px 0;margin-bottom:10px;border-bottom:1px solid var(--line);font-size:14px}
.site-bar a{border:none;color:var(--muted)}
.site-bar a:hover{color:var(--accent)}
.site-bar .home{font-weight:700;color:var(--fg);letter-spacing:-.01em;font-size:15px}

/* landing hero */
.lp-hero{padding:54px 0 30px;border-bottom:1px solid var(--line);margin-bottom:8px}
.lp-hero h1{font-size:40px;margin:0 0 10px}
.lp-hero .tagline{font-size:19px;color:var(--muted);margin:0;max-width:640px}
.lp-hero .links{margin-top:20px;font-size:15px;display:flex;gap:18px;flex-wrap:wrap}

/* section label */
.lp-label{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);
  font-weight:700;margin:42px 0 6px}

/* writeup list */
.entries{list-style:none;padding:0;margin:18px 0}
.entry{display:block;text-decoration:none;border:none;background:var(--card);
  border:1px solid var(--line);border-radius:14px;padding:22px 24px;margin:14px 0;
  box-shadow:var(--shadow);transition:transform .12s ease,box-shadow .12s ease}
.entry:hover{transform:translateY(-2px);box-shadow:0 4px 10px rgba(0,0,0,.07),0 16px 40px rgba(0,0,0,.06)}
.entry .e-top{display:flex;align-items:center;gap:12px;margin-bottom:8px;flex-wrap:wrap}
.entry .date{font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums;
  background:#efece5;padding:3px 9px;border-radius:6px;letter-spacing:.02em}
.entry h2{font-size:21px;margin:0;color:var(--fg);letter-spacing:-.01em;padding:0}
.entry .desc{color:var(--muted);margin:0 0 12px;font-size:15.5px}
.entry .tags{display:flex;gap:7px;flex-wrap:wrap}
.entry .t{font-size:11.5px;font-weight:600;color:var(--accent);background:#eef6f0;
  border:1px solid #cfe6d8;padding:2px 9px;border-radius:999px;letter-spacing:.02em}
.entry.draft{opacity:.62}
.entry.draft .t{color:var(--muted);background:#f1efe9;border-color:var(--line)}

.lp-foot{color:var(--muted);font-size:14px;margin-top:50px;padding-top:22px;border-top:1px solid var(--line)}