/* ============ TOKENS ============ */
:root{
  --bg:#D3D3D3;
  --surface:#FFFFFF;
  --surface-sunken:#C7C7C7;
  --text:#16264A;
  --text-muted:#4C5B78;
  --border:#BEBEC2;
  --border-strong:#8A8B90;
  --link:#16264A;
  --accent:#16264A;
  --accent-contrast:#FFFFFF;
  --shadow:0 1px 2px rgba(0,0,0,0.08), 0 8px 24px -12px rgba(0,0,0,0.18);

  --plate-bg:linear-gradient(155deg,#1F3160 0%,#0A1428 78%);
  --plate-text:#F0F0F2;
  --plate-text-muted:#A9AAB0;
  --plate-line:rgba(240,240,242,0.14);
  --plate-accent:#9FB6D6;

  --font-display:'Big Shoulders Display','Arial Narrow',sans-serif;
  --font-body:'IBM Plex Sans','Segoe UI',system-ui,-apple-system,sans-serif;
  --font-mono:'IBM Plex Mono','SFMono-Regular',Consolas,monospace;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#242529;
    --surface:#2E2F34;
    --surface-sunken:#1A1B1E;
    --text:#F0F0F2;
    --text-muted:#9EA0A8;
    --border:#3F4046;
    --border-strong:#63656D;
    --link:#A9C0DE;
    --accent:#7FA0D0;
    --accent-contrast:#121315;
    --shadow:0 1px 2px rgba(0,0,0,0.4), 0 8px 24px -12px rgba(0,0,0,0.6);
  }
}
:root[data-theme="dark"]{
  --bg:#242529;
  --surface:#2E2F34;
  --surface-sunken:#1A1B1E;
  --text:#F0F0F2;
  --text-muted:#9EA0A8;
  --border:#3F4046;
  --border-strong:#63656D;
  --link:#A9C0DE;
  --accent:#7FA0D0;
  --accent-contrast:#121315;
  --shadow:0 1px 2px rgba(0,0,0,0.4), 0 8px 24px -12px rgba(0,0,0,0.6);
}

/* ============ RESET / BASE ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  padding-inline:clamp(18px,4vw,48px);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;}
a{color:var(--link);}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;margin:0;text-wrap:balance;letter-spacing:0.01em;color:var(--accent);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px;}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:0.001ms !important;animation-iteration-count:1 !important;transition-duration:0.001ms !important;}
}

.wrap{max-width:1180px;margin-inline:auto;}
.eyebrow{
  font-family:var(--font-mono);
  font-size:0.72rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--text-muted);
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;background:var(--accent);display:inline-block;flex:none;
}
.tabular{font-variant-numeric:tabular-nums;}

/* ============ HEADER ============ */
header.site{
  position:sticky;top:0;z-index:40;
  background:color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  max-width:1180px;margin-inline:auto;
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;
  padding-block:14px;
}
.wordmark{
  display:flex;flex-direction:column;line-height:1;
}
.wordmark a{text-decoration:none;color:var(--text);}
.wordmark .name{
  font-family:var(--font-display);font-weight:900;font-size:1.4rem;letter-spacing:0.01em;
}
.wordmark .doc-id{
  font-family:var(--font-mono);font-size:0.62rem;letter-spacing:0.1em;color:var(--text-muted);text-transform:uppercase;margin-top:2px;
}
nav.links{display:flex;align-items:center;gap:22px;flex-wrap:wrap;}
nav.links a{
  font-family:var(--font-mono);font-size:0.78rem;letter-spacing:0.05em;text-transform:uppercase;
  text-decoration:none;color:var(--text-muted);
  padding-block:4px;border-bottom:1px solid transparent;
}
nav.links a:hover{color:var(--text);border-color:var(--accent);}
nav.links a.active{color:var(--text);border-color:var(--accent);}
.btn{
  font-family:var(--font-mono);font-size:0.78rem;letter-spacing:0.05em;text-transform:uppercase;
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:3px;text-decoration:none;
  border:1px solid var(--border-strong);color:var(--text);
  transition:background .15s ease,color .15s ease,border-color .15s ease;
}
.btn:hover{background:var(--text);color:var(--bg);}
.btn.primary{
  background:var(--accent);border-color:var(--accent);color:var(--accent-contrast);
}
.btn.primary:hover{background:transparent;color:var(--accent);}

/* ============ HERO ============ */
.hero{
  max-width:1180px;margin-inline:auto;
  padding-block:clamp(40px,7vw,76px) clamp(28px,5vw,48px);
  position:relative;
}
.hero-grid{
  display:grid;grid-template-columns:1.3fr 1fr;gap:clamp(24px,5vw,56px);align-items:end;
}
.hero h1{
  font-size:clamp(3rem,8vw,6.2rem);
  line-height:0.92;
  color:var(--text);
}
.hero .role{
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:clamp(0.85rem,1.6vw,1.02rem);
  letter-spacing:0.04em;
  color:var(--accent);
  text-transform:uppercase;
}
.hero p.objective{
  margin-top:22px;max-width:56ch;color:var(--text-muted);font-size:1.06rem;
}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px;}
.hero .contact-strip{
  margin-top:30px;display:flex;gap:18px;flex-wrap:wrap;
  font-family:var(--font-mono);font-size:0.82rem;color:var(--text-muted);
}
.hero .contact-strip a{color:var(--text-muted);text-decoration:none;border-bottom:1px dotted var(--border-strong);}
.hero .contact-strip a:hover{color:var(--accent);border-color:var(--accent);}

/* airfoil / rocket diagram */
.airfoil-card{
  border:1px solid var(--border);border-radius:6px;background:var(--surface);
  padding:18px 18px 14px;box-shadow:var(--shadow);
}
.airfoil-card svg,.airfoil-card img{width:100%;height:auto;display:block;border-radius:3px;}
.airfoil-card .cap{
  margin-top:8px;display:flex;justify-content:space-between;flex-wrap:wrap;row-gap:4px;column-gap:10px;
  font-family:var(--font-mono);font-size:0.66rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--text-muted);
}
.airfoil-stroke{fill:none;stroke:var(--border-strong);stroke-width:1.6;}
.airfoil-dim{stroke:var(--text-muted);stroke-width:1;stroke-dasharray:3 3;}
.airfoil-label{font-family:var(--font-mono);font-size:8px;fill:var(--text-muted);letter-spacing:0.05em;}

/* ============ PLATE / STATS ============ */
.plate{
  background:var(--plate-bg);color:var(--plate-text);
  border-radius:8px;
  margin-block:clamp(28px,5vw,52px);
  padding:clamp(22px,4vw,34px) clamp(18px,4vw,34px);
  box-shadow:var(--shadow);
}
.plate-head{
  display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:10px;
  border-bottom:1px solid var(--plate-line);padding-bottom:14px;margin-bottom:20px;
  font-family:var(--font-mono);font-size:0.7rem;letter-spacing:0.12em;text-transform:uppercase;color:var(--plate-text-muted);
}
.stat-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:22px;
}
.stat{border-left:1px solid var(--plate-line);padding-left:16px;}
.stat .num{
  font-family:var(--font-display);font-weight:800;font-size:clamp(1.9rem,3.4vw,2.6rem);color:var(--plate-text);line-height:1;
}
.stat .num small{font-family:var(--font-mono);font-weight:500;font-size:0.9rem;color:var(--plate-accent);margin-left:2px;}
.stat .label{
  margin-top:8px;font-family:var(--font-mono);font-size:0.68rem;letter-spacing:0.06em;text-transform:uppercase;color:var(--plate-text-muted);
}

/* ============ SHEET INDEX (index.html contents list) ============ */
.sheet-index{display:flex;flex-direction:column;}
.sheet-index a.row{
  display:flex;justify-content:space-between;align-items:center;gap:18px;
  padding:20px 6px;border-top:1px solid var(--border);
  text-decoration:none;color:var(--text);
  transition:padding-left .15s ease,color .15s ease;
}
.sheet-index a.row:last-child{border-bottom:1px solid var(--border);}
.sheet-index a.row:hover{padding-left:10px;color:var(--accent);}
.sheet-index .num{font-family:var(--font-mono);font-size:0.76rem;color:var(--text-muted);width:96px;flex:none;}
.sheet-index .title{font-family:var(--font-display);font-weight:800;font-size:1.4rem;flex:1 1 220px;}
.sheet-index .desc{font-family:var(--font-body);font-size:0.9rem;color:var(--text-muted);flex:2 1 320px;}
.sheet-index .arrow{font-family:var(--font-mono);font-size:1rem;color:var(--text-muted);flex:none;}
@media (max-width:700px){
  .sheet-index a.row{flex-wrap:wrap;}
  .sheet-index .desc{flex-basis:100%;}
}

/* ============ SECTIONS ============ */
section{
  max-width:1180px;margin-inline:auto;
  padding-block:clamp(36px,6vw,64px);
  border-top:1px solid var(--border);
}
.section-head{
  display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:12px;
  margin-bottom:clamp(24px,4vw,40px);
}
.section-head h2{font-size:clamp(1.7rem,3.4vw,2.35rem);}
.section-head .sheet{font-family:var(--font-mono);font-size:0.7rem;color:var(--text-muted);letter-spacing:0.1em;}
.section-intro{max-width:70ch;color:var(--text-muted);font-size:1.02rem;margin-bottom:clamp(24px,4vw,40px);margin-top:-12px;}

/* ============ CARDS (experience / research / projects) ============ */
.card-list{display:flex;flex-direction:column;gap:20px;}
.card{
  display:grid;grid-template-columns:1fr 220px;gap:24px;
  background:var(--surface);border:1px solid var(--border);border-radius:8px;
  padding:clamp(18px,3vw,28px);box-shadow:var(--shadow);
}
.card .body-col{min-width:0;}
.card-top{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;align-items:baseline;margin-bottom:10px;}
.card h3{font-size:1.35rem;}
.card .org{color:var(--accent);font-family:var(--font-mono);font-size:0.85rem;letter-spacing:0.02em;}
.card .dates{
  font-family:var(--font-mono);font-size:0.72rem;letter-spacing:0.05em;text-transform:uppercase;color:var(--text-muted);
  white-space:nowrap;
}

/* prose paragraphs (replaces bullet lists inside cards) */
.prose{margin-top:14px;display:flex;flex-direction:column;gap:12px;}
.prose p{color:var(--text);font-size:0.98rem;line-height:1.75;}

.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.tag{
  font-family:var(--font-mono);font-size:0.68rem;letter-spacing:0.04em;text-transform:uppercase;
  border:1px solid var(--border);border-radius:999px;padding:4px 10px;color:var(--text-muted);
}
.tag.award{border-color:var(--accent);color:var(--accent);}

.img-slot{
  border:1px dashed var(--border-strong);border-radius:6px;
  background:var(--surface-sunken);
  display:flex;align-items:center;justify-content:center;text-align:center;
  min-height:150px;padding:12px;
}
.img-slot .txt{font-family:var(--font-mono);font-size:0.68rem;letter-spacing:0.04em;text-transform:uppercase;color:var(--text-muted);line-height:1.5;}
.img-slot.filled{border-style:solid;border-color:var(--border);padding:0;overflow:hidden;background:var(--surface);}
.img-slot.filled img{width:100%;height:100%;object-fit:cover;display:block;}
.img-slot.filled.contain img{object-fit:contain;}
.img-slot.pair{border-style:solid;border-color:var(--border);padding:0;overflow:hidden;background:var(--border);
  display:flex;flex-direction:column;gap:2px;min-height:300px;}
.img-slot.pair img{width:100%;flex:1 1 50%;min-height:0;object-fit:cover;display:block;}

@media (max-width:760px){
  .card{grid-template-columns:1fr !important;}
  .img-slot{order:-1;min-height:120px;}
}
@media (max-width:800px){
  .hero-grid{grid-template-columns:1fr;align-items:start;}
  .airfoil-card{order:-1;max-width:340px;}
}

/* minor footnote row */
.footnote-row{
  padding-top:16px;border-top:1px dashed var(--border);
  font-size:0.88rem;color:var(--text-muted);
}
.footnote-row .top-line{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:8px;}
.footnote-row .org{color:var(--text-muted);}

/* ============ SKILLS ============ */
.skills-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;}
.skill-card{
  background:var(--surface);border:1px solid var(--border);border-radius:8px;
  padding:22px 24px;box-shadow:var(--shadow);
  display:flex;flex-direction:column;gap:12px;
}
.skill-card .cat-row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;}
.skill-card .cat{font-family:var(--font-mono);font-size:0.75rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--accent);}
.skill-card .num{font-family:var(--font-mono);font-size:0.72rem;color:var(--text-muted);}
.skill-card p{font-size:0.92rem;color:var(--text);line-height:1.7;}
.skill-card .tag-row{margin-top:auto;padding-top:2px;}

/* ============ INTERESTS ============ */
.interests-note{
  font-family:var(--font-mono);font-size:0.76rem;color:var(--text-muted);margin-bottom:16px;
  border-left:2px solid var(--accent);padding-left:12px;
}
.interest-tags{display:flex;flex-wrap:wrap;gap:10px;}
.interest-chip{
  border:1px dashed var(--border-strong);border-radius:999px;padding:8px 16px;
  font-family:var(--font-mono);font-size:0.78rem;color:var(--text-muted);
}
.interest-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-bottom:20px;}
.interest-card{
  border:1px solid var(--border);border-radius:8px;padding:20px;background:var(--surface);
  display:flex;flex-direction:column;gap:8px;
}
.interest-card .logo{height:56px;width:56px;object-fit:contain;border-radius:8px;margin-bottom:2px;}
.interest-card .name{font-family:var(--font-mono);font-size:0.72rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--accent);}
.interest-card p{font-size:0.92rem;color:var(--text-muted);line-height:1.65;}

/* ============ CONTACT / FOOTER ============ */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;}
.contact-tile{
  border:1px solid var(--border);border-radius:8px;padding:20px;background:var(--surface);
}
.contact-tile .k{font-family:var(--font-mono);font-size:0.68rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--text-muted);}
.contact-tile .v{margin-top:8px;font-size:1.05rem;}
.contact-tile a{text-decoration:none;color:var(--text);}
.contact-tile a:hover{color:var(--accent);}

/* ============ PAGE-TO-PAGE NAV (prev / next sheet) ============ */
.page-nav{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  max-width:1180px;margin-inline:auto;padding-block:28px;border-top:1px solid var(--border);
}
.page-nav a{
  font-family:var(--font-mono);font-size:0.76rem;letter-spacing:0.05em;text-transform:uppercase;
  text-decoration:none;color:var(--text-muted);border:1px solid var(--border);border-radius:4px;
  padding:12px 16px;transition:border-color .15s ease,color .15s ease;max-width:46%;
}
.page-nav a:hover{color:var(--text);border-color:var(--accent);}
.page-nav a .lbl{display:block;font-size:0.62rem;color:var(--text-muted);margin-bottom:4px;}
.page-nav a.next{text-align:right;margin-left:auto;}

footer{
  max-width:1180px;margin-inline:auto;padding-block:24px 40px;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-family:var(--font-mono);font-size:0.68rem;letter-spacing:0.06em;text-transform:uppercase;color:var(--text-muted);
  border-top:1px solid var(--border);margin-top:8px;
}