/* =====================================================================
   Fonts, self-hosted (no third-party requests)
===================================================================== */
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:400;font-display:swap;
  src:url('/assets/fonts/ibm-plex-sans-latin-400-normal.woff2') format('woff2');}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:500;font-display:swap;
  src:url('/assets/fonts/ibm-plex-sans-latin-500-normal.woff2') format('woff2');}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:600;font-display:swap;
  src:url('/assets/fonts/ibm-plex-sans-latin-600-normal.woff2') format('woff2');}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:700;font-display:swap;
  src:url('/assets/fonts/ibm-plex-sans-latin-700-normal.woff2') format('woff2');}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;
  src:url('/assets/fonts/ibm-plex-mono-latin-400-normal.woff2') format('woff2');}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;
  src:url('/assets/fonts/ibm-plex-mono-latin-500-normal.woff2') format('woff2');}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:600;font-display:swap;
  src:url('/assets/fonts/ibm-plex-mono-latin-600-normal.woff2') format('woff2');}

/* =====================================================================
   Theme tokens
===================================================================== */
:root{
  --bg:#0A0E17;
  --surface:#101728;
  --grid:#1C2740;
  --line:#25324E;
  --text:#E7ECF5;
  --text-dim:#9AA5BE;
  --text-faint:#6B7794;
  --accent:#5EEAD4;
  --accent-ink:#04140F;
  --accent-dim:rgba(94,234,212,0.14);
  --amber:#F2A93B;
  --amber-dim:rgba(242,169,59,0.13);
  --grid-size:48px;

  --radius:2px;
  --mono:'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans:'IBM Plex Sans', system-ui, -apple-system, Segoe UI, sans-serif;
}

/* Light theme: follows the OS unless the visitor picks one explicitly. */
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#FBFCFE;
    --surface:#FFFFFF;
    --grid:#E8EDF5;
    --line:#D3DBE8;
    --text:#111A2B;
    --text-dim:#465066;
    --text-faint:#6B7794;
    --accent:#0F8A78;
    --accent-ink:#FFFFFF;
    --accent-dim:rgba(15,138,120,0.10);
    --amber:#A76A05;
    --amber-dim:rgba(167,106,5,0.10);
  }
}
:root[data-theme="light"]{
  --bg:#FBFCFE;
  --surface:#FFFFFF;
  --grid:#E8EDF5;
  --line:#D3DBE8;
  --text:#111A2B;
  --text-dim:#465066;
  --text-faint:#6B7794;
  --accent:#0F8A78;
  --accent-ink:#FFFFFF;
  --accent-dim:rgba(15,138,120,0.10);
  --amber:#A76A05;
  --amber-dim:rgba(167,106,5,0.10);
}

/* =====================================================================
   Base
===================================================================== */
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;scroll-padding-top:80px;}

body{
  background-color:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.6;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size:var(--grid-size) var(--grid-size);
  background-attachment:fixed;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}

a{color:var(--accent);text-decoration:none;}
a:hover{text-decoration:underline;}
::selection{background:var(--accent-dim);color:var(--text);}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--radius);}

ul,ol{list-style:none;}

.wrap{max-width:940px;margin:0 auto;padding:0 24px;}

.visually-hidden{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:100;
  background:var(--accent);color:var(--accent-ink);
  padding:10px 16px;font-family:var(--mono);font-size:13px;
}
.skip-link:focus{left:8px;top:8px;}

/* =====================================================================
   Top bar
===================================================================== */
.topbar{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  max-width:940px;margin:0 auto;padding:12px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{
  font-family:var(--mono);font-size:13px;color:var(--text-dim);
  display:flex;align-items:center;gap:8px;
}
.brand:hover{text-decoration:none;color:var(--text);}
.brand .dot{
  width:7px;height:7px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 8px var(--accent);flex:none;
}
.nav{display:flex;align-items:center;gap:4px;}
.nav-btn{
  font-family:var(--mono);font-size:13px;
  color:var(--text-dim);border:1px solid transparent;
  padding:6px 12px;border-radius:var(--radius);
  transition:color .15s ease, background .15s ease, border-color .15s ease;
}
.nav-btn:hover{color:var(--text);text-decoration:none;}
.nav-btn.active{color:var(--accent);border-color:var(--line);background:var(--surface);}

.topbar-tools{display:flex;align-items:center;gap:8px;}
.icon-btn{
  background:var(--surface);border:1px solid var(--line);color:var(--text-dim);
  width:30px;height:28px;border-radius:var(--radius);cursor:pointer;font-size:14px;
  display:flex;align-items:center;justify-content:center;
}
.icon-btn:hover{color:var(--accent);}
.lang-toggle{
  display:flex;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  font-family:var(--mono);font-size:12px;
}
.lang-toggle a{
  background:var(--surface);color:var(--text-faint);padding:6px 10px;
  transition:background .15s ease,color .15s ease;
}
.lang-toggle a:hover{text-decoration:none;color:var(--text);}
.lang-toggle a.active{background:var(--accent-dim);color:var(--accent);}

/* =====================================================================
   Hero
===================================================================== */
main{padding-bottom:64px;}

.hero{
  padding:64px 24px 40px;
  display:grid;grid-template-columns:1.15fr 0.85fr;gap:40px;align-items:center;
}
.hero-eyebrow{
  font-family:var(--mono);font-size:12px;color:var(--text-faint);
  letter-spacing:0.04em;margin-bottom:14px;
}
h1.name{
  font-family:var(--mono);font-weight:600;font-size:clamp(30px,4.5vw,42px);
  letter-spacing:-0.015em;line-height:1.15;margin-bottom:8px;
}
.role-line{color:var(--text-dim);font-size:17px;margin-bottom:20px;min-height:27px;}
.role-line .accent{color:var(--accent);}
.cursor{
  display:inline-block;width:8px;height:16px;background:var(--accent);
  vertical-align:text-bottom;animation:blink 1s step-end infinite;margin-left:2px;
}
@keyframes blink{50%{opacity:0;}}

.hero-meta{
  display:flex;flex-wrap:wrap;gap:8px 18px;
  font-family:var(--mono);font-size:12.5px;color:var(--text-faint);margin-bottom:24px;
}
.hero-meta a{color:var(--text-faint);}
.hero-meta a:hover{color:var(--accent);}

.hero-actions{display:flex;flex-wrap:wrap;gap:10px;}
.btn{
  display:inline-block;font-family:var(--mono);font-size:13.5px;font-weight:600;
  padding:11px 20px;border-radius:var(--radius);border:1px solid transparent;
  cursor:pointer;transition:opacity .15s ease,background .15s ease,color .15s ease;
}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--accent);color:var(--accent-ink);}
.btn-primary:hover{opacity:0.85;}
.btn-ghost{background:transparent;color:var(--text-dim);border-color:var(--line);}
.btn-ghost:hover{color:var(--text);border-color:var(--text-faint);}

.graph-box{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;
  position:relative;overflow:hidden;color:var(--line);
}
.graph-box svg{width:100%;height:100%;}
.graph-label{
  position:absolute;bottom:10px;left:12px;
  font-family:var(--mono);font-size:10px;color:var(--text-faint);letter-spacing:0.05em;
}

/* =====================================================================
   Section shell
===================================================================== */
.block{padding:40px 24px;}
.section-title{
  font-family:var(--mono);font-size:12.5px;font-weight:600;color:var(--accent);
  letter-spacing:0.09em;text-transform:uppercase;
  display:flex;align-items:center;gap:12px;margin-bottom:14px;
}
.section-title::after{content:'';flex:1;height:1px;background:var(--line);}
.section-intro{color:var(--text-faint);font-size:14px;margin-bottom:26px;max-width:70ch;}
.profile-text{color:var(--text-dim);font-size:15.5px;max-width:72ch;margin-bottom:14px;}

.permalink{
  color:var(--text-faint);font-weight:400;margin-left:8px;opacity:0;
  transition:opacity .15s ease;font-family:var(--mono);
}
.case:hover .permalink,.role:hover .permalink,.permalink:focus{opacity:1;}

/* =====================================================================
   Selected work, the four case studies
===================================================================== */
.case-list{display:flex;flex-direction:column;gap:20px;}
.case{
  background:var(--surface);border:1px solid var(--line);
  border-left:2px solid var(--accent);
  border-radius:var(--radius);padding:24px 26px;
  opacity:0;transform:translateY(14px);
  transition:opacity .5s ease, transform .5s ease;
}
.case.in-view{opacity:1;transform:translateY(0);}
.case-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 16px;}
.case-role{font-family:var(--mono);font-weight:600;font-size:17px;line-height:1.35;}
.case-period{
  font-family:var(--mono);font-size:12px;color:var(--text-faint);margin-left:auto;white-space:nowrap;
}
.case-org{font-size:14px;color:var(--text-dim);margin:4px 0 12px;}
.case-org .client{color:var(--text-faint);}
.case-summary{font-size:15px;color:var(--text-dim);margin-bottom:14px;max-width:72ch;}
.case-bullets{margin-bottom:16px;}
.case-bullets li{
  font-size:14.5px;color:var(--text-dim);padding-left:18px;position:relative;margin-bottom:7px;
  max-width:74ch;
}
.case-bullets li::before{content:'›';position:absolute;left:0;color:var(--text-faint);}
.case-result{
  background:var(--amber-dim);border-left:2px solid var(--amber);
  padding:10px 14px;font-size:14px;color:var(--text);
  border-radius:0 var(--radius) var(--radius) 0;margin-bottom:16px;
}
.case-result b{
  display:block;color:var(--amber);font-family:var(--mono);
  font-weight:600;font-size:11px;letter-spacing:0.06em;text-transform:uppercase;margin-bottom:3px;
}
.stack-row{display:flex;flex-wrap:wrap;gap:6px;}
.tag{
  font-family:var(--mono);font-size:11px;color:var(--text-dim);
  background:var(--bg);border:1px solid var(--line);
  padding:3px 8px;border-radius:var(--radius);
}

/* =====================================================================
   Earlier experience, compact timeline
===================================================================== */
.timeline{position:relative;padding-left:24px;}
.timeline::before{
  content:'';position:absolute;left:4px;top:8px;bottom:8px;width:1px;background:var(--line);
}
.role{position:relative;padding-bottom:28px;}
.role:last-child{padding-bottom:0;}
.role::before{
  content:'';position:absolute;left:-24px;top:9px;width:7px;height:7px;border-radius:50%;
  background:var(--bg);border:1.5px solid var(--text-faint);
}
.role-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 14px;}
.role-title{font-family:var(--mono);font-weight:600;font-size:14.5px;line-height:1.4;}
.role-period{
  font-family:var(--mono);font-size:11.5px;color:var(--text-faint);margin-left:auto;white-space:nowrap;
}
.role-org{font-size:13.5px;color:var(--text-dim);margin:2px 0 8px;}
.role-org .client{color:var(--text-faint);}
.role-summary{font-size:14px;color:var(--text-dim);margin-bottom:8px;max-width:72ch;}
.role-bullets{margin-bottom:8px;}
.role-bullets li{
  font-size:13.5px;color:var(--text-dim);padding-left:16px;position:relative;margin-bottom:5px;
  max-width:74ch;
}
.role-bullets li::before{content:'·';position:absolute;left:4px;color:var(--text-faint);}
.role-result,.role-stack{font-size:13px;color:var(--text-faint);max-width:74ch;margin-bottom:4px;}
.role-result-key,.role-stack-key{
  font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:0.05em;
  color:var(--text-faint);margin-right:4px;
}

/* =====================================================================
   Skills, education, certifications, languages
===================================================================== */
.skills-grid{display:flex;flex-direction:column;}
.skill-row{
  display:grid;grid-template-columns:190px 1fr;gap:16px;align-items:start;
  padding:14px 0;border-bottom:1px solid var(--line);
}
.skill-row:last-child{border-bottom:none;}
.skill-key{font-family:var(--mono);font-size:13px;color:var(--accent);}

.edu-item{margin-bottom:18px;}
.edu-degree{font-family:var(--mono);font-weight:600;font-size:14.5px;line-height:1.4;}
.edu-school{font-size:13.5px;color:var(--text-dim);}
.edu-period{font-family:var(--mono);font-size:11.5px;color:var(--text-faint);}

.cert-list li{
  display:flex;justify-content:space-between;gap:12px;
  font-size:13.5px;color:var(--text-dim);
  padding:9px 0;border-bottom:1px solid var(--line);
}
.cert-list li:last-child{border-bottom:none;}
.cert-year{font-family:var(--mono);font-size:11.5px;color:var(--text-faint);white-space:nowrap;}

.lang-list{display:flex;gap:22px;flex-wrap:wrap;}
.lang-item{font-family:var(--mono);font-size:13px;color:var(--text-dim);}
.lang-item b{color:var(--text);}

/* =====================================================================
   Closing call to action
===================================================================== */
.cta-band{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  margin:24px auto 0;padding:32px 26px;text-align:center;
}
.cta-band h2{font-family:var(--mono);font-weight:600;font-size:22px;margin-bottom:8px;}
.cta-band p{color:var(--text-dim);font-size:14.5px;max-width:60ch;margin:0 auto 16px;}

/* =====================================================================
   Contact page
===================================================================== */
.contact-hero{padding:56px 24px 12px;}
.contact-title{font-family:var(--mono);font-weight:600;font-size:clamp(26px,4vw,34px);margin-bottom:10px;}
.contact-sub{color:var(--text-dim);font-size:15.5px;max-width:62ch;}

.contact-grid{
  display:grid;grid-template-columns:1.1fr 0.9fr;gap:28px;
  padding:28px 24px 56px;align-items:start;
}
.request-box,.response-box{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;
}
.request-bar,.response-bar{
  display:flex;align-items:center;gap:8px;padding:10px 16px;
  border-bottom:1px solid var(--line);
  font-family:var(--mono);font-size:11.5px;color:var(--text-faint);
}
.request-bar .verb{color:var(--accent);font-weight:600;}
.response-bar .status{color:var(--amber);font-weight:600;}
.request-body,.response-body{padding:22px;}
.response-body{display:flex;flex-direction:column;gap:16px;}

.field{margin-bottom:16px;}
.field label{
  display:block;font-family:var(--mono);font-size:11px;color:var(--text-faint);
  text-transform:uppercase;letter-spacing:0.05em;margin-bottom:6px;
}
.field input,.field textarea{
  width:100%;background:var(--bg);border:1px solid var(--line);color:var(--text);
  font-family:var(--sans);font-size:15px;padding:10px 12px;border-radius:var(--radius);resize:vertical;
}
.field textarea{min-height:130px;}
.field input:focus,.field textarea:focus{border-color:var(--accent);}
.honeypot{position:absolute;left:-9999px;top:-9999px;width:1px;height:1px;overflow:hidden;}
.form-note{font-size:12.5px;color:var(--text-faint);margin-top:12px;}
.form-note.is-success{color:var(--accent);}
.form-note.is-error{color:var(--amber);}
button[disabled]{opacity:0.6;cursor:progress;}

.contact-line{display:flex;flex-direction:column;gap:3px;}
.contact-line .k{
  font-family:var(--mono);font-size:11px;color:var(--text-faint);
  text-transform:uppercase;letter-spacing:0.05em;
}
.contact-line .v{font-size:14.5px;color:var(--text);}

/* =====================================================================
   Footer
===================================================================== */
footer{border-top:1px solid var(--line);padding:22px 0;}
.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;}
footer p{font-family:var(--mono);font-size:11.5px;color:var(--text-faint);}
.footer-links a{color:var(--text-faint);}
.footer-links a:hover{color:var(--accent);}

/* =====================================================================
   Responsive
===================================================================== */
@media (max-width:800px){
  .hero{grid-template-columns:1fr;padding-top:44px;gap:32px;}
  .graph-box{max-width:280px;margin:0 auto;width:100%;}
  .contact-grid{grid-template-columns:1fr;}
  .skill-row{grid-template-columns:1fr;gap:8px;}
  .case-period,.role-period{margin-left:0;}
  .topbar-inner{flex-wrap:wrap;gap:10px;}
  .case{padding:20px 18px;}
  .footer-inner{flex-direction:column;}
}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .case{opacity:1;transform:none;}
}

/* =====================================================================
   Print, an ink-friendly CV
===================================================================== */
@media print{
  :root{
    --bg:#FFFFFF;--surface:#FFFFFF;--grid:transparent;--line:#BBBBBB;
    --text:#000000;--text-dim:#222222;--text-faint:#555555;
    --accent:#000000;--accent-dim:transparent;--amber:#000000;--amber-dim:transparent;
  }
  @page{margin:14mm;}
  body{
    background:#FFFFFF !important;background-image:none !important;
    font-size:10.5pt;line-height:1.4;color:#000;
  }
  .topbar,.skip-link,.hero-actions,.graph-box,.cta-band,footer,
  .icon-btn,.lang-toggle,.nav,.permalink,.section-intro{display:none !important;}

  main{padding-bottom:0;}
  .wrap{max-width:none;padding:0;}
  .hero{display:block;padding:0 0 10pt;}
  h1.name{font-size:20pt;margin-bottom:2pt;}
  .role-line{font-size:11pt;margin-bottom:6pt;color:#000;}
  .cursor{display:none;}
  .hero-meta{font-size:9pt;gap:4pt 12pt;margin-bottom:0;}
  .hero-meta a{color:#000;text-decoration:none;}

  .block{padding:8pt 0;}
  .section-title{
    font-size:10pt;color:#000;letter-spacing:0.08em;
    border-bottom:1pt solid #000;padding-bottom:2pt;margin-bottom:8pt;
  }
  .section-title::after{display:none;}

  .case,.role{
    background:none !important;border:none !important;
    padding:0;margin-bottom:10pt;opacity:1 !important;transform:none !important;
    page-break-inside:avoid;break-inside:avoid;
  }
  .case{border-left:none !important;}
  .timeline{padding-left:0;}
  .timeline::before,.role::before{display:none;}
  .case-role,.role-title{font-size:11pt;}
  .case-period,.role-period{font-size:9pt;}
  .case-summary,.case-bullets li,.role-bullets li{font-size:10pt;color:#000;}
  .case-result{
    background:none !important;border-left:none !important;padding:0;
    font-size:10pt;font-style:italic;
  }
  .case-result b{display:inline;font-style:normal;margin-right:4pt;}
  .tag{
    border:none;background:none;padding:0;font-size:9pt;color:#333;
  }
  .stack-row{gap:0;}
  .tag::after{content:' · ';}
  .stack-row li:last-child::after{content:'';}

  .skill-row{grid-template-columns:150px 1fr;padding:5pt 0;}
  .cert-list li{padding:3pt 0;}
  a{color:#000;text-decoration:none;}
  section{page-break-inside:auto;}
  h2,h3{page-break-after:avoid;}
}