/* Layout: a regulatory-document page. Narrow running column, wide figure in the hero, section labels set like SAP headings in a left margin. */
:root{
  --bg:#F4F7FB;
  --surface:#FFFFFF;
  --ink:#0B1F3A;
  --muted:#4A5B73;
  --rule:#D3DDEA;
  --accent:#1D5BC2;
  --accent-soft:#E3ECFA;
  --deep:#0B1F3A;
  --on-deep:#E8EFFA;
  --on-deep-muted:#9FB3D1;
  --font-display:"Spectral", Georgia, "Times New Roman", serif;
  --font-body:"Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono:"JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --maxw:72rem;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#08111F; --surface:#0F1C31; --ink:#E6EDF7; --muted:#9DAEC6; --rule:#22344F;
    --accent:#7AA8F2; --accent-soft:#132A4D; --deep:#050C17; --on-deep:#E6EDF7; --on-deep-muted:#8EA3C2;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#08111F; --surface:#0F1C31; --ink:#E6EDF7; --muted:#9DAEC6; --rule:#22344F;
  --accent:#7AA8F2; --accent-soft:#132A4D; --deep:#050C17; --on-deep:#E6EDF7; --on-deep-muted:#8EA3C2;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}
body{background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:1.0625rem;line-height:1.65;margin:0}
a{color:var(--accent)}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(1rem,4vw,2.5rem)}
h1,h2,h3{font-family:var(--font-display);font-weight:600;text-wrap:balance;margin:0;line-height:1.15}
p{margin:0}
.label{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}

/* nav */
.nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--rule)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-block:.85rem}
.brand{font-family:var(--font-display);font-weight:600;font-size:1.15rem;color:var(--ink);text-decoration:none;white-space:nowrap}
.brand span{color:var(--accent)}
.nav ul{display:flex;gap:1.5rem;list-style:none;margin:0;padding:0;font-size:.9rem}
.nav ul a{color:var(--muted);text-decoration:none}
.nav ul a:hover{color:var(--ink)}
.nav .cta{background:var(--accent);color:var(--bg);padding:.45rem .9rem;border-radius:4px;text-decoration:none;font-weight:600;font-size:.88rem;white-space:nowrap}
@media (max-width:760px){.nav ul{display:none}}

/* hero */
.hero{padding-block:clamp(3rem,7vw,5.5rem) clamp(2.5rem,5vw,4rem)}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:clamp(2rem,5vw,4rem);align-items:center}
.hero h1{font-size:clamp(2.2rem,5vw,3.6rem);letter-spacing:-.01em;margin-block:1rem 1.25rem}
.hero h1 em{font-style:italic;font-weight:400;color:var(--accent)}
.hero .lede{color:var(--muted);font-size:1.15rem;max-width:34rem}
.hero .actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:2rem}
.btn{display:inline-block;padding:.75rem 1.25rem;border-radius:4px;font-weight:600;font-size:.95rem;text-decoration:none;border:1px solid var(--accent)}
.btn.primary{background:var(--accent);color:var(--bg)}
.btn.ghost{color:var(--accent);background:transparent}
figure.plot{margin:0;background:var(--surface);border:1px solid var(--rule);border-radius:6px;padding:1.25rem 1.25rem 1rem;min-width:0}
figure.plot svg{width:100%;height:auto;display:block}
figure.plot figcaption{font-size:.8rem;color:var(--muted);margin-top:.6rem;line-height:1.5}
.plot-head{display:flex;justify-content:space-between;gap:1rem;align-items:baseline;margin-bottom:.5rem;flex-wrap:wrap}
.plot-head strong{font-family:var(--font-display);font-size:1.05rem}
svg text{font-family:var(--font-mono);font-size:10px;fill:var(--muted)}
svg .row-label{font-family:var(--font-body);font-size:11.5px;fill:var(--ink)}
svg .grid{stroke:var(--rule);stroke-width:1}
svg .axis{stroke:var(--muted);stroke-width:1}
svg .tick{stroke:var(--muted);stroke-width:1}
svg .km-dev{fill:none;stroke:var(--accent);stroke-width:2.2}
svg .km-ctl{fill:none;stroke:var(--muted);stroke-width:1.8;stroke-dasharray:5 3}
svg .cz-dev{stroke:var(--accent);stroke-width:1.4}
svg .cz-ctl{stroke:var(--muted);stroke-width:1.4}
svg .lbl-dev{fill:var(--accent);font-weight:500;font-family:var(--font-body);font-size:11px}
svg .lbl-ctl{fill:var(--muted);font-weight:500;font-family:var(--font-body);font-size:11px}
svg .risk{fill:var(--ink);font-variant-numeric:tabular-nums}
svg .risk-head{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.06em;text-transform:uppercase;fill:var(--muted)}
@media (max-width:860px){.hero .wrap{grid-template-columns:minmax(0,1fr)}}

/* credentials strip */
.creds{background:var(--deep);color:var(--on-deep)}
.creds .wrap{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1.5rem;padding-block:2rem}
.cred b{display:block;font-family:var(--font-display);font-size:1.6rem;font-weight:600;line-height:1.2}
.cred span{font-size:.88rem;color:var(--on-deep-muted)}
@media (max-width:760px){.creds .wrap{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* sections */
section.block{padding-block:clamp(3.5rem,7vw,5.5rem);border-bottom:1px solid var(--rule)}
.sec{display:grid;grid-template-columns:13rem minmax(0,1fr);gap:clamp(1.5rem,4vw,3rem)}
.sec-head{position:relative}
.sec-head .label{display:block;margin-bottom:.5rem}
.sec-body h2{font-size:clamp(1.7rem,3.2vw,2.3rem);margin-bottom:1rem;max-width:40rem}
.sec-body > p.intro{color:var(--muted);max-width:40rem;margin-bottom:2.5rem}
@media (max-width:860px){.sec{grid-template-columns:minmax(0,1fr)}}

/* services */
.services{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--rule)}
.svc{padding:1.5rem 1.5rem 1.6rem 0;border-bottom:1px solid var(--rule);min-width:0}
.svc:nth-child(odd){padding-right:2rem;border-right:1px solid var(--rule)}
.svc:nth-child(even){padding-left:2rem}
.svc .code{font-family:var(--font-mono);font-size:.72rem;color:var(--accent);letter-spacing:.04em}
.svc h3{font-size:1.25rem;margin-block:.35rem .5rem}
.svc p{color:var(--muted);font-size:.97rem}
@media (max-width:640px){.services{grid-template-columns:minmax(0,1fr)}.svc,.svc:nth-child(odd),.svc:nth-child(even){padding:1.4rem 0;border-right:0}}

/* engagement */
.engage{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin-bottom:3rem}
.eng{background:var(--surface);border:1px solid var(--rule);border-radius:6px;padding:1.5rem;min-width:0}
.eng h3{font-size:1.2rem;margin-bottom:.5rem}
.eng p{color:var(--muted);font-size:.95rem}
.eng .tag{font-family:var(--font-mono);font-size:.72rem;color:var(--accent);text-transform:uppercase;letter-spacing:.08em;display:block;margin-bottom:.75rem}
@media (max-width:860px){.engage{grid-template-columns:minmax(0,1fr)}}
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem;counter-reset:s}
.steps li{counter-increment:s;border-top:2px solid var(--accent);padding-top:1rem;min-width:0}
.steps li::before{content:"Step " counter(s);font-family:var(--font-mono);font-size:.75rem;color:var(--accent);letter-spacing:.06em;text-transform:uppercase;display:block;margin-bottom:.4rem}
.steps h3{font-size:1.1rem;margin-bottom:.35rem}
.steps p{color:var(--muted);font-size:.95rem}
@media (max-width:760px){.steps{grid-template-columns:minmax(0,1fr)}}

/* experience */
.timeline{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.timeline li{display:grid;grid-template-columns:9.5rem minmax(0,1fr);gap:1.5rem;padding-block:1.15rem;border-bottom:1px solid var(--rule)}
.timeline .when{font-family:var(--font-mono);font-size:.8rem;color:var(--muted);font-variant-numeric:tabular-nums;padding-top:.2rem}
.timeline h3{font-family:var(--font-body);font-size:1rem;font-weight:600}
.timeline h3 .org{color:var(--accent);font-weight:500}
.timeline p{color:var(--muted);font-size:.93rem;margin-top:.2rem}
@media (max-width:560px){.timeline li{grid-template-columns:minmax(0,1fr);gap:.25rem}}

/* expertise */
.expertise{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2rem}
.expertise h3{font-family:var(--font-mono);font-size:.75rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:.75rem}
.expertise ul{list-style:none;margin:0;padding:0;display:grid;gap:.4rem}
.expertise li{font-size:.95rem;padding-left:1rem;position:relative}
.expertise li::before{content:"";position:absolute;left:0;top:.7em;width:.4rem;height:1px;background:var(--accent)}
@media (max-width:760px){.expertise{grid-template-columns:minmax(0,1fr)}}

/* about / pubs */
.about-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:3rem}
.about-grid p + p{margin-top:1rem}
.about-grid .copy p{max-width:38rem}
.edu{background:var(--surface);border:1px solid var(--rule);border-radius:6px;padding:1.5rem;align-self:start;min-width:0}
.edu dt{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-top:1rem}
.edu dt:first-child{margin-top:0}
.edu dd{margin:.25rem 0 0;font-size:.95rem}
@media (max-width:860px){.about-grid{grid-template-columns:minmax(0,1fr)}}
.pubs{list-style:none;margin:0;padding:0;display:grid;gap:1rem}
.pubs li{font-size:.93rem;color:var(--muted);padding-left:1rem;border-left:2px solid var(--rule)}
.pubs li i{color:var(--ink)}

/* contact */
.contact{background:var(--deep);color:var(--on-deep);padding-block:clamp(3.5rem,7vw,5.5rem)}
.contact .wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:3rem;align-items:start}
.contact h2{font-size:clamp(1.9rem,4vw,2.8rem);color:var(--on-deep)}
.contact .label{color:var(--on-deep-muted)}
.contact p.sub{color:var(--on-deep-muted);margin-top:1rem;max-width:30rem}
.channels{display:grid;gap:.75rem}
.ch{display:flex;justify-content:space-between;align-items:center;gap:1rem;border:1px solid color-mix(in srgb,var(--on-deep) 18%,transparent);border-radius:6px;padding:1rem 1.15rem;min-width:0}
.ch div{min-width:0}
.ch small{display:block;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--on-deep-muted)}
.ch a,.ch span.v{color:var(--on-deep);font-size:1.05rem;text-decoration:none;overflow-wrap:anywhere;user-select:all}
.ch a:hover{text-decoration:underline}
.copy-btn{font:500 .78rem var(--font-body);color:var(--on-deep);background:transparent;border:1px solid color-mix(in srgb,var(--on-deep) 30%,transparent);border-radius:4px;padding:.35rem .7rem;cursor:pointer;white-space:nowrap}
.copy-btn:hover{background:color-mix(in srgb,var(--on-deep) 10%,transparent)}
@media (max-width:860px){.contact .wrap{grid-template-columns:minmax(0,1fr)}}
footer{background:var(--deep);color:var(--on-deep-muted);font-size:.82rem;border-top:1px solid color-mix(in srgb,var(--on-deep) 12%,transparent)}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem;padding-block:1.25rem}

/* ---- multi-page additions ---- */
:root{--plot-alpha:.09}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--plot-alpha:.13}}
:root[data-theme="dark"]{--plot-alpha:.13}
.bgplot{position:fixed;inset:0;z-index:0;color:var(--accent);opacity:var(--plot-alpha);pointer-events:none}
.bgplot svg{width:100%;height:100%;display:block}
.page{position:relative;z-index:1}
.nav ul a[aria-current="page"]{color:var(--ink);text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:.4em;text-decoration-thickness:2px}
.page-head{padding-block:clamp(3rem,7vw,5rem) clamp(2rem,4vw,3rem)}
.page-head h1{font-size:clamp(2.2rem,5vw,3.4rem);margin-block:.9rem 1rem;max-width:44rem}
.page-head .intro{color:var(--muted);font-size:1.15rem;max-width:40rem}
.plot-note{display:block;margin-top:1.75rem;font-family:var(--font-mono);font-size:.75rem;color:var(--muted);border-top:1px solid var(--rule);padding-top:.6rem;max-width:40rem}
.plot-note b{color:var(--accent);font-weight:500;text-transform:uppercase;letter-spacing:.08em;margin-right:.6rem}
@media (max-width:760px){.nav .wrap{flex-wrap:wrap;row-gap:.6rem}.nav ul{display:flex;order:3;width:100%;gap:1.25rem;overflow-x:auto;font-size:.88rem}}
.page-body{padding-block:0 clamp(3.5rem,7vw,5rem)}
.page-body > .wrap > * + *{margin-top:3rem}
.page-body .sub-h{font-size:clamp(1.5rem,2.8vw,1.9rem);margin-bottom:.75rem}
.page-body .sub-intro{color:var(--muted);max-width:40rem;margin-bottom:2rem}
.next{display:flex;justify-content:flex-end;border-top:1px solid var(--rule);padding-top:1.5rem}
.next a{text-decoration:none;font-family:var(--font-display);font-size:1.35rem;color:var(--ink)}
.next a small{display:block;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);text-align:right}
.next a:hover span{text-decoration:underline;text-decoration-color:var(--accent)}
/* surfaces sit on top of the plot */
.services,.timeline,.pubs{background:color-mix(in srgb,var(--bg) 82%,transparent)}
/* contact form */
.cform{display:grid;gap:1rem;min-width:0}
.cform .row2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1rem}
@media (max-width:560px){.cform .row2{grid-template-columns:minmax(0,1fr)}}
.cform label{display:grid;gap:.35rem;font-size:.8rem;font-weight:600;letter-spacing:.02em;color:var(--on-deep-muted)}
.cform .opt{font-weight:400;opacity:.8}
.cform input,.cform select,.cform textarea{font:400 1rem var(--font-body);color:var(--on-deep);background:color-mix(in srgb,var(--on-deep) 6%,transparent);border:1px solid color-mix(in srgb,var(--on-deep) 24%,transparent);border-radius:4px;padding:.7rem .8rem;width:100%;min-width:0}
.cform select option{color:#0B1F3A;background:#FFFFFF}
.cform textarea{resize:vertical;min-height:7rem}
.cform input::placeholder,.cform textarea::placeholder{color:var(--on-deep-muted);opacity:.7}
.cform input:focus-visible,.cform select:focus-visible,.cform textarea:focus-visible{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}
.cform .hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.cform .send{justify-self:start;font:600 .95rem var(--font-body);background:var(--accent);color:var(--bg);border:0;border-radius:4px;padding:.8rem 1.4rem;cursor:pointer}
.cform .send:disabled{opacity:.6;cursor:wait}
.cform .status{font-size:.92rem;min-height:1.4em;color:var(--on-deep-muted)}
.cform .status.ok{color:#8FD3A8}
.cform .status.err{color:#F2B8A0}
/* contents index on home */
.toc{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.toc a{display:grid;grid-template-columns:3.5rem minmax(0,14rem) minmax(0,1fr) auto;gap:1rem;align-items:baseline;padding-block:1.35rem;border-bottom:1px solid var(--rule);text-decoration:none;color:var(--ink)}
.toc .no{font-family:var(--font-mono);font-size:.85rem;color:var(--accent)}
.toc .t{font-family:var(--font-display);font-size:1.5rem;font-weight:600}
.toc .d{color:var(--muted);font-size:.97rem}
.toc .arr{color:var(--accent);font-size:1.2rem;transition:transform .2s}
.toc a:hover .t{text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:.2em}
.toc a:hover .arr{transform:translateX(4px)}
@media (prefers-reduced-motion: reduce){.toc .arr{transition:none}}
@media (max-width:640px){.toc a{grid-template-columns:2.5rem minmax(0,1fr) auto}.toc .d{grid-column:2 / 3}}