/* ================================================================
   ARTC — Advanced Research and Technology Corporation
   Design system: engineering drawing / spec-sheet aesthetic.
   Paper ground, blueprint ink, phosphor-green data accent,
   monospace reference numbers throughout (echoes NIST-style
   control refs and contract numbers already used across ARTC docs).
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+Condensed:wght@500;600;700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --paper:      #edefe9;
  --paper-2:    #e2e5dc;
  --ink:        #12161c;
  --ink-soft:   #4a5058;
  --blueprint:  #1f3d5c;
  --blueprint-2:#2c5478;
  --phosphor:   #3f9463;
  --redline:    #c1521e;
  --line:       #c7cbc0;
  --line-dark:  rgba(237,239,233,0.16);
  --max: 1120px;
  --radius: 2px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'IBM Plex Sans', system-ui, sans-serif;
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:'IBM Plex Sans Condensed', 'IBM Plex Sans', sans-serif;
  font-weight:700;
  letter-spacing:0.01em;
  margin:0 0 0.5em;
  color:var(--ink);
}

a{ color:var(--blueprint); text-decoration:none; }
a:hover{ color:var(--phosphor); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:2px solid var(--phosphor);
  outline-offset:2px;
}

p{ margin:0 0 1em; color:var(--ink-soft); max-width:64ch; }

.mono{
  font-family:'IBM Plex Mono', ui-monospace, monospace;
}

.eyebrow{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.72rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--blueprint);
  display:flex;
  align-items:center;
  gap:0.6em;
  margin-bottom:0.9em;
}
.eyebrow::before{
  content:"";
  width:20px;
  height:1px;
  background:var(--redline);
  display:inline-block;
}

.wrap{
  max-width:var(--max);
  margin:0 auto;
  padding:0 28px;
}

/* ---------------- Sheet frame ----------------
   The whole page reads as a single drawing sheet:
   thin border, corner ticks, and a title block in the footer. */
.sheet{
  border:1px solid var(--ink);
  margin:10px;
  min-height:calc(100vh - 20px);
  display:flex;
  flex-direction:column;
  position:relative;
}
.sheet::before,.sheet::after,
.sheet-tick-br, .sheet-tick-bl{
  content:"";
  position:absolute;
  width:14px;
  height:14px;
  border:1px solid var(--ink);
  z-index:2;
}
.sheet::before{ top:-1px; left:-1px; border-right:none; border-bottom:none; }
.sheet::after{ top:-1px; right:-1px; border-left:none; border-bottom:none; }

/* ---------------- Header / Nav ---------------- */
.site-header{
  border-bottom:1px solid var(--ink);
  background:var(--paper);
  position:sticky;
  top:0;
  z-index:20;
}
.site-header .wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-top:16px;
  padding-bottom:16px;
  gap:24px;
}
.brand{
  display:flex;
  flex-direction:column;
  line-height:1.15;
}
.brand-mark{
  font-family:'IBM Plex Sans Condensed', sans-serif;
  font-weight:700;
  font-size:1.5rem;
  letter-spacing:0.02em;
  color:var(--ink);
}
.brand-mark span{ color:var(--phosphor); }
.brand-sub{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.62rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--ink-soft);
}

nav.primary-nav ul{
  list-style:none;
  display:flex;
  gap:2px;
  margin:0;
  padding:0;
}
nav.primary-nav a{
  display:flex;
  align-items:baseline;
  gap:6px;
  padding:8px 14px;
  font-family:'IBM Plex Mono', monospace;
  font-size:0.78rem;
  letter-spacing:0.04em;
  text-transform:uppercase;
  color:var(--ink);
  border:1px solid transparent;
}
nav.primary-nav a .idx{ color:var(--redline); font-size:0.7rem; }
nav.primary-nav a:hover, nav.primary-nav a[aria-current="page"]{
  border-color:var(--ink);
  background:var(--paper-2);
  color:var(--ink);
}
nav.primary-nav a[aria-current="page"] .idx{ color:var(--phosphor); }

.nav-toggle{
  display:none;
  background:none;
  border:1px solid var(--ink);
  width:40px;
  height:40px;
  cursor:pointer;
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  background:var(--ink);
  margin:4px auto;
}

/* ---------------- Hero ---------------- */
.hero{
  background:var(--ink);
  color:var(--paper);
  border-bottom:1px solid var(--ink);
  position:relative;
  overflow:hidden;
}
.hero .wrap{
  padding-top:64px;
  padding-bottom:64px;
  display:grid;
  grid-template-columns:1.15fr 1fr;
  gap:40px;
  align-items:center;
  position:relative;
  z-index:2;
}
.hero .eyebrow{ color:var(--phosphor); }
.hero .eyebrow::before{ background:var(--phosphor); }
.hero h1{
  color:var(--paper);
  font-size:clamp(2.1rem, 4vw, 3.1rem);
  line-height:1.08;
  max-width:16ch;
}
.hero p{
  color:#c3c9c2;
  max-width:46ch;
  font-size:1.05rem;
}
.hero-badges{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  margin:18px 0 26px;
}
.badge{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.68rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  border:1px solid var(--line-dark);
  color:#c3c9c2;
  padding:5px 10px;
}
.cta-row{ display:flex; gap:12px; flex-wrap:wrap; }
.btn{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.78rem;
  letter-spacing:0.05em;
  text-transform:uppercase;
  padding:12px 20px;
  border:1px solid var(--phosphor);
  color:var(--phosphor);
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:transparent;
  cursor:pointer;
}
.btn:hover{ background:var(--phosphor); color:var(--ink); }
.btn.solid{ background:var(--phosphor); color:var(--ink); }
.btn.solid:hover{ background:var(--paper); border-color:var(--paper); color:var(--ink); }
.btn.light{ border-color:var(--line-dark); color:var(--paper); }
.btn.light:hover{ background:var(--paper); color:var(--ink); border-color:var(--paper); }
.btn.dark{ border-color:var(--ink); color:var(--ink); }
.btn.dark:hover{ background:var(--ink); color:var(--paper); }

/* radar scope graphic */
.scope{
  position:relative;
  aspect-ratio:1/1;
  max-width:360px;
  margin:0 auto;
  border-radius:50%;
  border:1px solid var(--line-dark);
}
.scope::before{
  content:"";
  position:absolute;
  inset:16%;
  border-radius:50%;
  border:1px solid var(--line-dark);
}
.scope::after{
  content:"";
  position:absolute;
  inset:38%;
  border-radius:50%;
  border:1px solid var(--line-dark);
}
.scope-cross{
  position:absolute; inset:0;
}
.scope-cross::before, .scope-cross::after{
  content:"";
  position:absolute;
  background:var(--line-dark);
}
.scope-cross::before{ left:0; right:0; top:50%; height:1px; }
.scope-cross::after{ top:0; bottom:0; left:50%; width:1px; }
.scope-sweep{
  position:absolute;
  inset:0;
  border-radius:50%;
  background:conic-gradient(from 0deg, rgba(63,148,99,0.55), transparent 32%);
  animation:sweep 4.5s linear infinite;
}
@media (prefers-reduced-motion: reduce){
  .scope-sweep{ animation:none; }
}
@keyframes sweep{ to{ transform:rotate(360deg); } }
.scope-blip{
  position:absolute;
  width:6px; height:6px;
  background:var(--phosphor);
  border-radius:50%;
  box-shadow:0 0 8px 2px rgba(63,148,99,0.6);
}
.scope-label{
  position:absolute;
  font-family:'IBM Plex Mono', monospace;
  font-size:0.6rem;
  letter-spacing:0.06em;
  color:var(--phosphor);
  transform:translate(8px,-6px);
}

/* ---------------- Sections ---------------- */
section{ padding:56px 0; border-bottom:1px solid var(--line); }
section.on-dark{ background:var(--ink); border-bottom:1px solid var(--ink); }
section.on-dark h2, section.on-dark h3{ color:var(--paper); }
section.on-dark p{ color:#c3c9c2; }
section:last-of-type{ border-bottom:none; }

.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:20px;
  margin-bottom:32px;
  flex-wrap:wrap;
}
.section-head h2{ font-size:1.7rem; margin:0; }
.section-num{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.75rem;
  color:var(--ink-soft);
}

/* News log */
.news-log{ list-style:none; margin:0; padding:0; border-top:1px solid var(--line); }
.news-log li{
  display:grid;
  grid-template-columns:64px 1fr;
  gap:18px;
  padding:16px 0;
  border-bottom:1px solid var(--line);
}
.news-log .tag{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.7rem;
  color:var(--redline);
  letter-spacing:0.06em;
}
.news-log p{ margin:0; color:var(--ink); }

/* Capability grid */
.cap-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.cap-card{
  background:var(--paper);
  padding:26px 24px;
}
.cap-card .icon{
  width:34px; height:34px;
  margin-bottom:16px;
  color:var(--blueprint);
}
.cap-card .icon svg{ width:100%; height:100%; display:block; }
.cap-card h3{ font-size:1.05rem; margin-bottom:10px; }
.cap-card ul{
  margin:0; padding:0;
  list-style:none;
  font-size:0.92rem;
  color:var(--ink-soft);
}
.cap-card li{
  padding:5px 0 5px 14px;
  border-left:1px solid var(--line);
  position:relative;
}
.cap-card li::before{
  content:"";
  position:absolute; left:-1px; top:0; bottom:0;
  width:1px; background:var(--phosphor);
  opacity:0;
}
.cap-card li:hover::before{ opacity:1; }

/* Legend list (About expertise) */
.legend{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:0;
  border:1px solid var(--line);
}
.legend-item{
  display:flex;
  gap:12px;
  padding:14px 18px;
  border-bottom:1px solid var(--line);
  border-right:1px solid var(--line);
  font-size:0.94rem;
  align-items:baseline;
}
.legend-item:nth-child(2n){ border-right:none; }
.legend-item .li-idx{
  font-family:'IBM Plex Mono', monospace;
  color:var(--redline);
  font-size:0.75rem;
  min-width:2ch;
}

/* Callout / hiring card */
.callout{
  border:1px solid var(--ink);
  padding:32px;
  display:grid;
  grid-template-columns:1fr auto;
  gap:24px;
  align-items:center;
  background:var(--paper-2);
}
.callout h3{ margin-bottom:8px; }

/* Cards (contract / bio) */
.card{
  border:1px solid var(--line);
  padding:28px;
  background:var(--paper);
}
.card + .card{ margin-top:1px; }
.field-row{
  display:grid;
  grid-template-columns:200px 1fr;
  gap:16px;
  padding:12px 0;
  border-top:1px solid var(--line);
  font-size:0.94rem;
}
.field-row:first-child{ border-top:none; }
.field-label{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.72rem;
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--ink-soft);
}
.two-col{
  display:grid;
  grid-template-columns:1.3fr 1fr;
  gap:40px;
  align-items:start;
}
.monogram{
  width:96px; height:96px;
  border:1px solid var(--ink);
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:'IBM Plex Mono', monospace;
  font-weight:600;
  font-size:1.4rem;
  color:var(--blueprint);
  flex-shrink:0;
}
.bio-head{ display:flex; gap:18px; align-items:center; margin-bottom:18px; }
.bio-head h3{ margin-bottom:4px; }
.bio-head .role{ color:var(--ink-soft); font-size:0.9rem; }

/* Publications */
.pub-list{ list-style:none; margin:0; padding:0; }
.pub-list li{
  padding:22px 0;
  border-top:1px solid var(--line);
  display:grid;
  grid-template-columns:80px 1fr;
  gap:20px;
}
.pub-list li:last-child{ border-bottom:1px solid var(--line); }
.pub-list .yr{ font-family:'IBM Plex Mono', monospace; color:var(--redline); font-size:0.85rem; }
.pub-list h3{ font-size:1.05rem; margin-bottom:4px; }
.pub-list .venue{ font-size:0.88rem; color:var(--ink-soft); }

/* Contact */
.contact-grid{
  display:grid;
  grid-template-columns:0.9fr 1.1fr;
  gap:40px;
  align-items:start;
}
form.contact-form{ display:flex; flex-direction:column; gap:16px; }
.form-row label{
  display:block;
  font-family:'IBM Plex Mono', monospace;
  font-size:0.72rem;
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--ink-soft);
  margin-bottom:6px;
}
.form-row input, .form-row textarea{
  width:100%;
  border:1px solid var(--ink);
  background:var(--paper);
  padding:11px 12px;
  font-family:'IBM Plex Sans', sans-serif;
  font-size:0.95rem;
  color:var(--ink);
  border-radius:0;
}
.form-row textarea{ min-height:130px; resize:vertical; }
.form-status{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.82rem;
  min-height:1.4em;
}
.form-status[data-state="ok"]{ color:var(--phosphor); }
.form-status[data-state="err"]{ color:var(--redline); }

/* ---------------- Footer / title block ---------------- */
.site-footer{
  margin-top:auto;
  border-top:1px solid var(--ink);
  background:var(--paper-2);
}
.title-block{
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr auto;
}
.tb-cell{
  padding:16px 20px;
  border-left:1px solid var(--line);
  font-size:0.82rem;
  color:var(--ink-soft);
}
.tb-cell:first-child{ border-left:none; }
.tb-cell strong{ display:block; color:var(--ink); font-size:0.88rem; margin-bottom:4px; }
.tb-label{
  font-family:'IBM Plex Mono', monospace;
  font-size:0.62rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--ink-soft);
  display:block;
  margin-bottom:6px;
}
.tb-cell a{ color:var(--blueprint); }
.tb-sheet{
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  justify-content:center;
  font-family:'IBM Plex Mono', monospace;
  font-size:0.72rem;
  text-align:right;
  gap:2px;
  color:var(--ink-soft);
}
.tb-sheet strong{ color:var(--ink); font-size:0.82rem; }

/* ---------------- Responsive ---------------- */
@media (max-width:860px){
  .hero .wrap{ grid-template-columns:1fr; }
  .scope{ max-width:240px; }
  .cap-grid{ grid-template-columns:1fr; }
  .legend{ grid-template-columns:1fr; }
  .legend-item:nth-child(2n){ border-right:1px solid var(--line); }
  .two-col{ grid-template-columns:1fr; }
  .contact-grid{ grid-template-columns:1fr; }
  .title-block{ grid-template-columns:1fr 1fr; }
  .tb-sheet{ align-items:flex-start; text-align:left; grid-column:1/-1; border-top:1px solid var(--line); padding-top:12px; margin-top:4px; }
}
@media (max-width:640px){
  .nav-toggle{ display:block; }
  nav.primary-nav{
    position:absolute;
    top:100%; left:0; right:0;
    background:var(--paper);
    border-bottom:1px solid var(--ink);
    display:none;
  }
  nav.primary-nav.open{ display:block; }
  nav.primary-nav ul{ flex-direction:column; }
  nav.primary-nav a{ padding:14px 20px; border-bottom:1px solid var(--line); }
  .field-row{ grid-template-columns:1fr; }
  .title-block{ grid-template-columns:1fr; }
  .tb-cell{ border-left:none; border-top:1px solid var(--line); }
  .tb-cell:first-child{ border-top:none; }
}