: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}