/* ============================================================
   TOKENS
   ============================================================ */
:root{
  --ink:        #16202C;
  --indigo:     #0F2E5C;   /* deep professional blue — replaces dark navy sections */
  --indigo-2:   #163B72;
  --parchment:  #F5F8FC;   /* soft blue-white page background */
  --parchment-2:#E8EFF9;
  --brass:      #1B4B91;   /* primary blue accent — replaces brass/gold */
  --brass-lt:   #6FA1E0;   /* light blue accent, used on dark sections */
  --ledger-green:#1B4B91;  /* kept as an alias so existing rules stay blue */
  --rule:       #D7E3F0;
  --rule-dark:  #2E4B76;
  --white:      #FFFFFF;

  --display: "Newsreader", serif;
  --body: "IBM Plex Sans", sans-serif;
  --mono: "IBM Plex Mono", monospace;

  --max: 1180px;
  --pad: clamp(1.25rem, 4vw, 3.5rem);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--parchment);
  color:var(--ink);
  font-family:var(--body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,h4{ font-family:var(--display); font-weight:500; margin:0; }
p{ margin:0; }
ul,ol{ margin:0; padding:0; list-style:none; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

/* subtle paper grain */
.grain{
  position:fixed; inset:0; pointer-events:none; z-index:1;
  opacity:0.035; mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* focus visibility */
a:focus-visible, button:focus-visible{
  outline:2px solid var(--brass);
  outline-offset:3px;
  border-radius:2px;
}

/* ============================================================
   LETTERHEAD (institutional header, sits above the nav)
   ============================================================ */
.letterhead{
  background:var(--white);
  border-bottom:3px solid var(--brass);
}
.letterhead__inner{
  max-width:var(--max);
  margin:0 auto;
  padding:1.6rem var(--pad);
  display:grid;
  grid-template-columns:96px 1fr 96px;
  align-items:center;
  gap:1.5rem;
}
.letterhead__logo,
.letterhead__photo{
  width:88px; height:88px;
  border-radius:50%;
  overflow:hidden;
  border:2px solid var(--rule);
  box-shadow:0 6px 18px -8px rgba(15,46,92,0.25);
}
.letterhead__logo{ justify-self:start; }
.letterhead__photo{ justify-self:end; }
.letterhead__logo img,
.letterhead__photo img{
  width:100%; height:100%; object-fit:cover; display:block;
}
.letterhead__logo img{ object-fit:contain; padding:6px; background:var(--white); }
.letterhead__center{ text-align:center; }
.letterhead__name{
  font-family:var(--display);
  font-size:clamp(1.5rem, 3vw, 2.1rem);
  color:var(--indigo);
  margin-bottom:0.4rem;
}
.letterhead__tagline{
  font-family:var(--mono);
  font-size:0.72rem;
  letter-spacing:0.02em;
  color:var(--brass);
  line-height:1.6;
}

@media (max-width:640px){
  .letterhead__inner{
    grid-template-columns:1fr 1fr;
    grid-template-areas:
      "logo photo"
      "center center";
    row-gap:1rem;
  }
  .letterhead__logo{ grid-area:logo; justify-self:start; }
  .letterhead__photo{ grid-area:photo; justify-self:end; }
  .letterhead__center{ grid-area:center; }
  .letterhead__logo, .letterhead__photo{ width:64px; height:64px; }
}

/* ============================================================
   NAV
   ============================================================ */
.nav{
  position:sticky; top:0; z-index:50;
  display:flex; align-items:center; justify-content:space-between;
  padding:1.1rem var(--pad);
  border-bottom:1px solid var(--rule);
}
.nav::before{
  content:""; position:absolute; inset:0; z-index:-1;
  background:rgba(245,248,252,0.92);
  backdrop-filter:blur(8px);
}
.nav__mark{
  font-family:var(--mono); font-size:0.95rem; letter-spacing:0.02em;
  font-weight:500;
}
.nav__mark span{ color:var(--brass); }
.nav__links{ display:flex; gap:2rem; font-size:0.92rem; }
.nav__links a{
  position:relative; padding-bottom:2px;
}
.nav__links a::after{
  content:""; position:absolute; left:0; bottom:0; width:0; height:1px;
  background:var(--brass); transition:width 0.25s ease;
}
.nav__links a:hover::after{ width:100%; }
.nav__toggle{ display:none; background:none; border:0; cursor:pointer; padding:0.4rem; }
.nav__toggle span{
  display:block; width:22px; height:2px; background:var(--ink); margin:5px 0; transition:0.25s;
}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  min-height:calc(100vh - 140px);
  display:flex;
  flex-direction:column;
  justify-content:center;
  padding:4.5rem var(--pad) 4rem;
  max-width:var(--max);
  margin:0 auto;
  width:100%;
}
.eyebrow{
  font-family:var(--mono); font-size:0.78rem; letter-spacing:0.12em; text-transform:uppercase;
  color:var(--ledger-green); margin-bottom:1.1rem;
}
.hero__name{
  font-size:clamp(2.8rem, 6.5vw, 5.2rem);
  line-height:0.98;
  letter-spacing:-0.01em;
  margin-bottom:1.3rem;
}
.hero__role{
  font-size:1.15rem; font-weight:500; color:var(--indigo);
  margin-bottom:1.1rem;
  border-left:3px solid var(--brass);
  padding-left:0.85rem;
}
.hero__summary{
  max-width:70ch; color:#3A4552; margin-bottom:2.2rem;
}
.hero__cta{ display:flex; gap:1rem; flex-wrap:wrap; }
.btn{
  font-family:var(--mono); font-size:0.85rem; letter-spacing:0.02em;
  padding:0.85rem 1.5rem; border-radius:2px; border:1px solid var(--indigo);
  transition:all 0.2s ease;
  display:inline-block;
}
.btn--primary{ background:var(--indigo); color:var(--white); }
.btn--primary:hover{ background:var(--brass); border-color:var(--brass); color:var(--white); }
.btn--ghost{ background:transparent; color:var(--indigo); }
.btn--ghost:hover{ background:var(--indigo); color:var(--white); }

/* ============================================================
   SECTIONS (shared)
   ============================================================ */
.section{
  max-width:var(--max); margin:0 auto;
  padding:6rem var(--pad);
}
.section--dark{
  max-width:none;
  background:var(--indigo);
  color:var(--parchment);
}
.section--dark .section__label,
.section--dark h3, .section--dark h4{ color:var(--parchment); }
.section--dark > *{ max-width:var(--max); margin-left:auto; margin-right:auto; }

.section__label{
  display:flex; align-items:center; gap:0.7rem;
  font-family:var(--display); font-style:italic; font-size:1.4rem;
  margin-bottom:2.8rem;
}
.tag-mono{
  font-family:var(--mono); font-style:normal; font-size:0.72rem;
  color:var(--brass); border:1px solid var(--brass); border-radius:2px;
  padding:0.15rem 0.5rem;
}
.section__intro{ max-width:60ch; color:#4A5460; margin-bottom:2.5rem; }
.section--dark .section__intro{ color:#B7C0CC; }

/* ============================================================
   ABOUT
   ============================================================ */
.about__grid{
  display:grid; grid-template-columns:1.2fr 1fr; gap:3rem; align-items:start;
}
.about__lead{ font-family:var(--display); font-size:1.5rem; line-height:1.5; color:var(--indigo); }
.about__facts{ display:grid; grid-template-columns:1fr 1fr; gap:1.8rem 1.5rem; }
.fact{ border-top:2px solid var(--brass); padding-top:0.6rem; }
.fact__num{ display:block; font-family:var(--display); font-size:2.2rem; color:var(--ink); }
.fact__label{ font-size:0.85rem; color:#5A6270; }

/* ============================================================
   EXPERIENCE — LEDGER
   ============================================================ */
.ledger__row{
  display:grid; grid-template-columns:180px 1fr; gap:2rem;
  padding:2rem 0; border-bottom:1px solid var(--rule-dark);
}
.ledger__row:first-child{ border-top:1px solid var(--rule-dark); }
.ledger__date{
  font-family:var(--mono); font-size:0.82rem; color:var(--brass-lt);
}
.ledger__content h3{ font-size:1.35rem; margin-bottom:0.25rem; }
.ledger__org{ font-family:var(--mono); font-size:0.8rem; color:#9BB3CC; margin-bottom:0.7rem; }
.ledger__content p:not(.ledger__org){ color:#C6CDD6; max-width:62ch; }

/* ============================================================
   PROJECT CARDS
   ============================================================ */
.cards{
  display:grid; grid-template-columns:repeat(auto-fit, minmax(280px,1fr)); gap:1.4rem;
}
.card{
  background:var(--white); border:1px solid var(--rule);
  border-radius:8px; padding:1.7rem;
  position:relative;
  transition:transform 0.22s ease, box-shadow 0.22s ease;
}
.card:hover{ transform:translateY(-4px); box-shadow:0 20px 40px -25px rgba(15,27,45,0.3); }
.card__tag{
  position:absolute; top:1.1rem; right:1.1rem;
  font-family:var(--mono); font-size:0.62rem; text-transform:uppercase; letter-spacing:0.06em;
  color:var(--ledger-green); border:1px solid var(--ledger-green); border-radius:2px; padding:0.15rem 0.45rem;
}
.card h3{ font-size:1.15rem; margin-bottom:0.7rem; padding-right:2.5rem; }
.card p{ color:#4A5460; font-size:0.92rem; margin-bottom:0.9rem; }
.card__stack{
  font-family:var(--mono) !important; font-size:0.72rem !important; color:var(--brass) !important;
  margin-bottom:0 !important;
}

/* ============================================================
   SKILLS
   ============================================================ */
.skillgroups{ display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:2.4rem; }
.skillgroup h4{ font-size:0.78rem; margin-bottom:0.9rem; color:var(--brass); font-family:var(--mono); font-weight:500; text-transform:uppercase; letter-spacing:0.06em; }
.section--dark .skillgroup h4{ color:var(--brass-lt); }
.chips{ display:flex; flex-wrap:wrap; gap:0.5rem; }
.chips span{
  font-family:var(--mono); font-size:0.75rem;
  border:1px solid var(--rule); color:var(--ink);
  padding:0.35rem 0.7rem; border-radius:20px;
  background:var(--white);
}
.section--dark .chips span{
  border-color:var(--rule-dark); color:#D6DCE3; background:transparent;
}
.chips--wrap{ margin-bottom:0; }

/* ============================================================
   SHARED SUBHEAD + INFO LIST (used by Teaching & Achievements)
   ============================================================ */
.subhead{
  font-family:var(--mono); font-size:0.78rem; text-transform:uppercase; letter-spacing:0.06em;
  color:var(--brass); margin:0 0 1rem;
}
.section--dark .subhead{ color:var(--brass-lt); }

.teach__grid{
  display:grid; grid-template-columns:1fr 1fr; gap:3rem;
  margin-top:2.5rem;
}

.infolist li{
  padding:0.85rem 0 0.85rem 1.2rem; border-bottom:1px solid var(--rule);
  font-size:0.92rem; color:#3A4552; position:relative; line-height:1.55;
}
.infolist li:first-child{ border-top:1px solid var(--rule); }
.infolist li::before{ content:"–"; position:absolute; left:0; color:var(--brass); }
.section--dark .infolist li{ border-color:var(--rule-dark); color:#C6CDD6; }
.section--dark .infolist li::before{ color:var(--brass-lt); }

/* ============================================================
   PUBLICATIONS
   ============================================================ */
.pubs li{
  display:grid; grid-template-columns:2.4rem 1fr; gap:1rem;
  padding:1.1rem 0; border-bottom:1px solid var(--rule);
}
.pubs li:first-child{ border-top:1px solid var(--rule); }
.pubs__num{ font-family:var(--mono); color:var(--brass); font-size:0.95rem; }
.pubs p{ color:#3A4552; font-size:0.95rem; }
.pubs em{ color:var(--ledger-green); font-style:italic; }

/* ============================================================
   EDUCATION
   ============================================================ */
.edu__table--bordered{
  width:100%; border-collapse:collapse;
  border:1px solid var(--rule);
  background:var(--white);
}
.edu__table--bordered th,
.edu__table--bordered td{
  border:1px solid var(--rule);
  padding:0.9rem 1.1rem;
  text-align:left;
  vertical-align:top;
}
.edu__table--bordered thead th{
  font-family:var(--mono); font-size:0.72rem; text-transform:uppercase; letter-spacing:0.05em;
  color:var(--white); background:var(--indigo);
}
.edu__table--bordered .edu__deg{ font-weight:500; color:var(--ink); }
.edu__table--bordered td{ font-size:0.92rem; color:#3A4552; }
.table-scroll{ width:100%; overflow-x:auto; }

/* ============================================================

   FOOTER / CONTACT
   ============================================================ */
.footer{ background:var(--indigo); color:var(--parchment); position:relative; }
.footer__perf{
  height:14px;
  background-image:radial-gradient(circle, var(--parchment) 3px, transparent 3.5px);
  background-size:22px 14px; background-position:center;
  opacity:0.15;
}
.footer__inner{ max-width:var(--max); margin:0 auto; padding:5rem var(--pad) 3rem; text-align:center; }
.footer__inner h2{ font-size:clamp(1.8rem,4vw,3rem); margin-bottom:2rem; }
.footer__contacts{ display:flex; flex-wrap:wrap; justify-content:center; gap:1rem 2rem; margin-bottom:2rem; }
.footer__contacts a{
  font-family:var(--mono); font-size:0.9rem; border-bottom:1px solid transparent;
  transition:border-color 0.2s ease;
}
.footer__contacts a:hover{ border-color:var(--brass); }
.footer__note{ color:#9AA3AE; font-size:0.85rem; margin-bottom:1.5rem; }
.footer__copy{ font-family:var(--mono); font-size:0.72rem; color:#5B6570; }

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal{ opacity:0; transform:translateY(18px); transition:opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible{ opacity:1; transform:translateY(0); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:920px){
  .hero{ padding-top:3rem; }
  .about__grid, .teach__grid{ grid-template-columns:1fr; }
  .ledger__row{ grid-template-columns:1fr; gap:0.5rem; }
}

@media (max-width:1000px){
  .nav__links{
    position:fixed; top:64px; left:0; right:0; bottom:0;
    background:var(--parchment); flex-direction:column; gap:0;
    padding:1rem var(--pad);
    transform:translateY(-110%); transition:transform 0.3s ease;
  }
  .nav__links.is-open{ transform:translateY(0); }
  .nav__links li{ border-bottom:1px solid var(--rule); }
  .nav__links a{ display:block; padding:1rem 0; }
  .nav__toggle{ display:block; }
}