:root{
  --bg:#0A0C0F; --panel:#13171D; --panel-2:#171C23; --line:#262C35; --line-soft:#1d232b;
  --ink:#E7EBF1; --ink-mid:#AEB6C2; --ink-dim:#737D8B;
  --off:#F5A524; --off-bright:#FFC25A; --def:#35CFE0; --def-deep:#1f9aa8; --crit:#E5484D;
  --maxw:820px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"IBM Plex Sans",system-ui,sans-serif;font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(900px 500px at 85% -10%, rgba(245,165,36,.06), transparent 60%),
    radial-gradient(900px 600px at -10% 30%, rgba(53,207,224,.05), transparent 55%);
  background-attachment:fixed;
}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace}

/* sticky top bar */
header.bar{position:sticky;top:0;z-index:50;background:rgba(10,12,15,.82);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.bar-in{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;gap:14px;padding:11px 22px}
.bar .brand{font-family:"IBM Plex Mono";font-weight:700;font-size:13px;letter-spacing:.02em;color:var(--ink);
  display:flex;align-items:center;gap:8px;white-space:nowrap}
.bar .dot{width:8px;height:8px;border-radius:2px;background:linear-gradient(135deg,var(--off),var(--def));
  box-shadow:0 0 12px rgba(245,165,36,.5)}
.bar .back{margin-left:auto;font-family:"IBM Plex Mono";font-size:12px;color:var(--ink-dim);
  text-decoration:none;padding:6px 10px;border-radius:6px;transition:.15s;white-space:nowrap}
.bar .back:hover{color:var(--ink);background:var(--panel)}

main{max-width:var(--maxw);margin:0 auto;padding:54px 22px 40px}
.eyebrow{font-family:"IBM Plex Mono";font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-dim);margin-bottom:16px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.eyebrow .box{font-weight:600}
.eyebrow .box.wb{color:var(--off-bright)}
.eyebrow .box.bb{color:var(--def)}
h1{font-family:"IBM Plex Mono";font-weight:700;font-size:clamp(28px,5vw,42px);line-height:1.08;
  margin:0 0 10px;letter-spacing:-.01em}
.authors{color:var(--ink-dim);font-size:13.5px;margin:0 0 22px;font-family:"IBM Plex Mono"}

/* paper link banner — pinned at top */
.paperlink{display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--off);
  border-radius:10px;padding:14px 16px;margin:0 0 30px}
.paperlink .lbl{font-family:"IBM Plex Mono";font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-dim);flex-shrink:0}
.paperlink a{color:var(--def);text-decoration:none;font-weight:600;font-size:15px;word-break:break-word}
.paperlink a:hover{text-decoration:underline}

h2{font-family:"IBM Plex Mono";font-weight:600;font-size:19px;margin:34px 0 10px;letter-spacing:-.01em;color:var(--ink)}
p{margin:0 0 15px;color:var(--ink-mid);max-width:68ch}
p strong{color:var(--ink);font-weight:600}
.lead{font-size:18px;color:var(--ink)}
ul{margin:0 0 15px;padding-left:0;list-style:none}
li{color:var(--ink-mid);padding:6px 0 6px 22px;position:relative;max-width:68ch}
li::before{content:"\25B8";position:absolute;left:0;color:var(--off)}
.callout{border-left:2px solid var(--def);background:rgba(53,207,224,.05);
  padding:13px 16px;border-radius:0 10px 10px 0;margin:18px 0;font-size:14.5px;color:var(--ink-mid)}
.callout.off{border-left-color:var(--off);background:rgba(245,165,36,.05)}
.lnk{color:var(--def);text-decoration:none;border-bottom:1px solid rgba(53,207,224,.35);transition:.15s}
.lnk:hover{border-bottom-color:var(--def);color:var(--off-bright)}
.tag{font-family:"IBM Plex Mono";font-size:11px;padding:2px 8px;border-radius:5px;border:1px solid;font-weight:500;white-space:nowrap}
.tag.wb{color:var(--off-bright);border-color:rgba(245,165,36,.35);background:rgba(245,165,36,.07)}
.tag.bb{color:var(--def);border-color:rgba(53,207,224,.35);background:rgba(53,207,224,.07)}

footer{max-width:var(--maxw);margin:30px auto 0;padding:24px 22px 60px;color:var(--ink-dim);
  font-size:12.5px;font-family:"IBM Plex Mono";border-top:1px solid var(--line-soft)}
footer a{color:var(--ink-dim)}
:focus-visible{outline:2px solid var(--def);outline-offset:3px;border-radius:4px}

/* essay-page helpers (Yegge field map) */
blockquote.q{margin:20px 0;padding:16px 20px;border-left:3px solid var(--def);
  background:var(--panel);border-radius:0 10px 10px 0;color:var(--ink);font-size:16.5px;line-height:1.55}
blockquote.q.off{border-left-color:var(--off)}
blockquote.q em{font-style:italic;color:var(--off-bright)}
blockquote.q .cite{display:block;margin-top:10px;font-family:"IBM Plex Mono";font-size:12px;color:var(--ink-dim)}
blockquote.q .cite a{color:var(--ink-dim);text-decoration:none;border-bottom:1px solid var(--line)}
blockquote.q .cite a:hover{color:var(--def)}
.tldr{border-left:3px solid var(--off);background:rgba(245,165,36,.05);
  padding:14px 18px;border-radius:0 10px 10px 0;margin:0 0 26px;font-size:15px;color:var(--ink-mid)}
.tldr b{color:var(--ink)}
.kv{font-family:"IBM Plex Mono";font-size:12.5px;color:var(--ink-dim);margin:0 0 16px}

/* field-map addition: unclassed links inside the page body follow the accent, not browser blue */
main a:not([class]){color:var(--def);text-decoration:underline;text-decoration-color:var(--ink-dim);text-underline-offset:2px;text-decoration-thickness:1px}
main a:not([class]):hover{text-decoration-color:var(--def)}

/* lecture + transcript pages (CS336 map) */
.outline,.readings,.exercises{padding-left:1.25em;margin:14px 0 26px}
.outline li,.readings li,.exercises li{margin:7px 0;line-height:1.6}
.outline a,.readings a,.exercises a{color:var(--def);text-decoration:none;border-bottom:1px solid var(--ink-dim)}
.outline a:hover,.readings a:hover,.exercises a:hover{border-bottom-color:var(--def)}
.outline a{font-family:'IBM Plex Mono',monospace;font-size:12.5px}
.code{display:inline-block;font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;padding:1px 6px;margin-left:6px;border:1px solid var(--def);color:var(--def);border-radius:3px;vertical-align:middle}
.transcript p{margin:0 0 16px;line-height:1.75}
.transcript h2{margin-top:40px}
.transcript a.ts{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--ink-dim);text-decoration:none;margin-right:8px;border-bottom:1px solid transparent}

/* problem → solution walkthrough (orchestrator-shaped) */
.walk{margin:4px 0 28px;border:1px solid var(--line);border-radius:10px;background:var(--panel);overflow:hidden}
.walk-bar{display:flex;flex-wrap:nowrap;align-items:center;gap:8px;padding:8px 12px;border-bottom:1px solid var(--line);background:var(--panel)}
.walk-btn{font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:11px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink);background:transparent;border:1px solid var(--line);border-radius:4px;padding:6px 10px;cursor:pointer;min-height:32px;flex:0 0 auto}
.walk-btn:hover{border-color:var(--ink-mid);background:var(--panel-2)}
.walk-btn.go{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.walk-btn.go:hover{background:var(--ink-mid);border-color:var(--ink-mid)}
.walk-btn:disabled{opacity:.35;cursor:default}
.walk-scrub{flex:1 1 auto;min-width:0}
.walk-scrub input{width:100%;accent-color:var(--off);height:1.4rem}
.walk-count{font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:11px;color:var(--ink-dim);white-space:nowrap;min-width:3.5rem;text-align:right}
.walk-stage{display:grid;grid-template-columns:minmax(0,1fr) 168px;grid-template-areas:"lede fig" "cols fig";gap:8px 14px;align-items:start;padding:12px 16px 14px}
.walk-lede{grid-area:lede;min-width:0}
.walk-fig{grid-area:fig}
.walk-cols{grid-area:cols;display:grid;grid-template-columns:1fr 1fr;gap:14px 18px;padding:0}
.walk-bridge{font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:12px;color:var(--off-bright);margin:0 0 6px}
.walk-bridge:empty{display:none}
.walk-t{font-family:"IBM Plex Mono",ui-monospace,monospace;font-weight:600;font-size:18px;margin:0;color:var(--ink);line-height:1.25}
.walk-lab{font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;margin:0 0 4px}
.walk-lab.p{color:var(--crit)}
.walk-lab.s{color:var(--def)}
.walk-body{margin:0;color:var(--ink-mid);font-size:14px;line-height:1.5;max-width:none}
.walk-body b{color:var(--ink);font-weight:600}
.walk-fig{margin:0;min-width:0}
.walk-fig img{width:100%;height:auto;max-height:112px;object-fit:contain;object-position:center top;display:block;background:#0e1218;border:1px solid var(--line);border-radius:6px}
.walk-fig figcaption{padding:6px 2px 0;font-size:11px;color:var(--ink-dim);font-family:"IBM Plex Mono",ui-monospace,monospace;line-height:1.35}
@media(max-width:800px){
  .walk-bar{flex-wrap:wrap}
  .walk-stage{grid-template-columns:1fr;grid-template-areas:"lede" "fig" "cols";gap:8px}
  .walk-fig{display:flex;gap:10px;align-items:center}
  .walk-fig img{width:140px;max-height:92px;flex:0 0 140px}
  .walk-cols{grid-template-columns:1fr;gap:10px}
}
.walk-page h1{font-size:clamp(20px,3.4vw,28px);margin:0 0 4px}
.walk-page .eyebrow{margin-bottom:8px}
.walk-page .authors{margin:0 0 12px}
.walk-page .paperlink,.walk-page .tldr{display:none}
.walk-page main{padding-top:24px}
.walk-nav{display:flex;flex-wrap:wrap;gap:8px 14px;margin:8px 0 22px;font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:12px}
.walk-nav a{color:var(--ink-dim);text-decoration:none;border-bottom:1px solid transparent}
.walk-nav a:hover,.walk-nav a.on{color:var(--def);border-bottom-color:var(--def)}

.transcript a.ts:hover{color:var(--def);border-bottom-color:var(--def)}
table.kv{border-collapse:collapse;width:100%;margin:14px 0 26px;font-size:14px}
table.kv th,table.kv td{text-align:left;padding:7px 10px;border-bottom:1px solid var(--line-soft);vertical-align:top}
table.kv th{font-family:'IBM Plex Mono',monospace;font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-dim)}

/* code excerpts (build-gpt map) */
pre.code-block{background:var(--panel,#15171c);border:1px solid var(--line-soft);border-radius:8px;padding:14px 16px;overflow-x:auto;font-family:'IBM Plex Mono',monospace;font-size:12.5px;line-height:1.6;margin:14px 0 22px;color:var(--ink)}
pre.code-block code{font-family:inherit;white-space:pre}
/* illustrated-story figures */
figure.ill{margin:22px 0 26px;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--panel)}
figure.ill img{width:100%;height:auto;display:block;border-bottom:1px solid var(--line)}
figure.ill figcaption{padding:10px 14px;font-size:12.5px;color:var(--ink-dim);font-family:"IBM Plex Mono",ui-monospace,monospace}
.roster{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:12px;margin:18px 0 28px}
.roster figure{margin:0}
.roster img{width:100%;height:auto;display:block;border:1px solid var(--line);border-radius:8px;background:#1a1e24}
.roster figcaption{font-size:12px;color:var(--ink-dim);margin-top:6px;line-height:1.35}
.roster b{color:var(--ink);font-weight:600;display:block;font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:12px}
.soon{opacity:.55}
.soon .name{font-weight:500}