:root{
    --paper:#EEF1EF;
    --paper-2:#E4E9E5;
    --ink:#131A1F;
    --ink-soft:#3C4A46;
    --line:#B9C4BD;
    --signal:#C98A1B;
    --signal-deep:#A66F12;
    --court:#35635A;
    --court-deep:#26463F;
    --card:#F7F8F6;
    --nav-bg: rgba(238,241,239,0.88);
    --strip-bg:#131A1F;
    --strip-fg:#EEF1EF;
    --strip-fg-muted:#A9B4AF;
    --max:1180px;
  }

  [data-theme="dark"]{
    --paper:#12161A;
    --paper-2:#181F23;
    --ink:#ECEFEC;
    --ink-soft:#9AA6A1;
    --line:#2A3236;
    --card:#171D21;
    --signal:#E3A23D;
    --signal-deep:#F0B457;
    --court:#59B3A4;
    --court-deep:#7DCFC0;
    --nav-bg: rgba(18,22,26,0.88);
  }

  body, nav, .focus-card, .book-card, .tag, .pub-index, .theme-toggle, .contact-list li{
    transition: background-color .25s ease, border-color .25s ease, color .25s ease;
  }

  *{box-sizing:border-box; margin:0; padding:0;}

  html{scroll-behavior:smooth;}

  body{
    background:var(--paper);
    color:var(--ink);
    font-family:'Inter', sans-serif;
    font-size:16px;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }

  ::selection{ background:var(--signal); color:var(--paper); }

  a{ color:inherit; }

  .wrap{
    max-width:var(--max);
    margin:0 auto;
    padding:0 32px;
  }

  h1,h2,h3{
    font-family:'Fraunces', serif;
    font-weight:560;
    letter-spacing:-0.01em;
    color:var(--ink);
  }

  .eyebrow{
    font-family:'IBM Plex Mono', monospace;
    font-size:12.5px;
    letter-spacing:0.14em;
    text-transform:uppercase;
    color:var(--court-deep);
    display:flex;
    align-items:center;
    gap:10px;
  }
  .eyebrow::before{
    content:"";
    width:22px; height:1px;
    background:var(--signal);
    display:inline-block;
  }

  /* ---------- NAV ---------- */
  nav{
    position:sticky; top:0; z-index:50;
    background:var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom:1px solid var(--line);
  }
  nav .wrap{
    display:flex; align-items:center; justify-content:space-between;
    height:64px;
  }
  .nav-name{
    font-family:'Fraunces', serif;
    font-weight:560;
    font-size:18px;
  }
  .nav-name span{ color:var(--signal-deep); }
  .nav-links{
    display:flex; gap:28px;
    list-style:none;
    font-size:14px;
    font-weight:500;
  }
  .nav-links a{
    text-decoration:none;
    color:var(--ink-soft);
    position:relative;
    padding-bottom:4px;
    transition:color .2s ease;
  }
  .nav-links a:hover{ color:var(--ink); }
  .nav-links a::after{
    content:"";
    position:absolute; left:0; bottom:0;
    width:0; height:1.5px;
    background:var(--signal);
    transition:width .25s ease;
  }
  .nav-links a:hover::after{ width:100%; }
  .nav-toggle{ display:none; }

  .theme-toggle{
    width:38px; height:38px;
    border:1px solid var(--line);
    background:var(--card);
    border-radius:50%;
    display:flex; align-items:center; justify-content:center;
    cursor:pointer;
    flex-shrink:0;
  }
  .theme-toggle:hover{ border-color:var(--signal); }
  .theme-toggle svg{
    width:18px; height:18px;
    stroke:var(--ink-soft);
    fill:none;
    stroke-width:1.6;
    stroke-linecap:round;
    stroke-linejoin:round;
  }
  .nav-right{ display:flex; align-items:center; gap:26px; }

  /* ---------- HERO ---------- */
  header.hero{
    position:relative;
    overflow:hidden;
    padding:88px 0 64px;
    border-bottom:1px solid var(--line);
  }
  .hero-grid{
    display:grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap:40px;
    align-items:center;
  }
  .hero-icons{
    display:flex; gap:16px;
    margin-bottom:6px;
  }
  .hero-icons .ficon{
    width:24px; height:24px;
    stroke:var(--signal-deep);
    opacity:.85;
  }
  .hero-copy h1{
    font-size:clamp(2.4rem, 4.6vw, 3.6rem);
    line-height:1.04;
    margin:18px 0 6px;
  }
  .hero-title{
    font-size:1.08rem;
    color:var(--ink-soft);
    font-weight:500;
    margin-bottom:22px;
  }
  .hero-lede{
    max-width:46ch;
    font-size:1.04rem;
    color:var(--ink-soft);
    margin-bottom:30px;
  }
  .hero-tags{
    display:flex; flex-wrap:wrap; gap:10px;
    margin-bottom:34px;
  }
  .tag{
    font-family:'IBM Plex Mono', monospace;
    font-size:12px;
    letter-spacing:0.03em;
    padding:7px 12px;
    border:1px solid var(--line);
    border-radius:100px;
    color:var(--ink-soft);
    background:var(--card);
  }
  .hero-cta{ display:flex; gap:14px; flex-wrap:wrap; }
  .btn{
    display:inline-flex; align-items:center; gap:8px;
    font-weight:600; font-size:14.5px;
    padding:13px 22px;
    border-radius:2px;
    text-decoration:none;
    transition:transform .18s ease, box-shadow .18s ease;
  }
  .btn-primary{
    background:var(--ink);
    color:var(--paper);
  }
  .btn-primary:hover{ transform:translateY(-2px); box-shadow:0 8px 20px rgba(19,26,31,0.22); }
  .btn-ghost{
    border:1px solid var(--ink);
    color:var(--ink);
  }
  .btn-ghost:hover{ transform:translateY(-2px); background:var(--ink); color:var(--paper); }

  /* signature diagram */
  .brain-wrap{ position:relative; }
  .brain-caption{
    font-family:'IBM Plex Mono', monospace;
    font-size:11px;
    color:var(--ink-soft);
    text-align:center;
    margin-top:10px;
    letter-spacing:.04em;
  }

  /* decorative court watermark */
  .court-bg{
    position:absolute;
    right:-60px; bottom:-70px;
    width:560px; height:auto;
    stroke:var(--court);
    stroke-width:1;
    fill:none;
    opacity:.09;
    pointer-events:none;
    z-index:0;
    transform:rotate(-4deg);
  }
  header.hero .wrap{ position:relative; z-index:1; }

  /* focus-card line icons */
  .ficon{
    width:26px; height:26px;
    stroke:var(--court-deep);
    fill:none;
    stroke-width:1.5;
    stroke-linecap:round;
    stroke-linejoin:round;
  }
  .focus-card-top{
    display:flex; align-items:center; justify-content:space-between;
  }

  /* publication document icon */
  .doc-icon{
    width:17px; height:17px;
    stroke:var(--ink-soft);
    fill:none;
    stroke-width:1.5;
    stroke-linecap:round;
    stroke-linejoin:round;
    opacity:.7;
    flex-shrink:0;
    margin-top:1px;
  }
  .pub-title-row{ display:flex; gap:9px; align-items:flex-start; margin-bottom:6px; }
  .pub-title-row .pub-title{ margin-bottom:0; }
  svg.diagram{ width:100%; height:auto; overflow:visible; }
  .node-dot{ fill:var(--signal); }
  .node-ring{ fill:none; stroke:var(--signal); stroke-width:1.4; opacity:.55; }
  .edge{ stroke:var(--court); stroke-width:1.1; opacity:.5; }
  .pulse{
    fill:var(--signal);
    opacity:0;
    animation: pulseTravel 3.6s ease-in-out infinite;
  }
  .node-label{
    font-family:'IBM Plex Mono', monospace;
    font-size:11.5px;
    fill:var(--ink-soft);
  }
  .node-label-tr{
    font-family:'Inter', sans-serif;
    font-weight:600;
    font-size:12.5px;
    fill:var(--ink);
  }
  @keyframes pulseTravel{
    0%{ opacity:0; }
    8%{ opacity:1; }
    45%{ opacity:1; }
    60%{ opacity:0; }
    100%{ opacity:0; }
  }
  @media (prefers-reduced-motion: reduce){
    .pulse{ animation:none; opacity:.9; }
    html{ scroll-behavior:auto; }
  }

  /* ---------- SECTION SHELL ---------- */
  section{ padding:80px 0; border-bottom:1px solid var(--line); }
  .section-head{
    display:flex;
    justify-content:space-between;
    align-items:flex-end;
    gap:24px;
    margin-bottom:44px;
    flex-wrap:wrap;
  }
  .section-head h2{ font-size:clamp(1.7rem, 3vw, 2.3rem); margin-top:10px; }
  .section-note{
    max-width:34ch;
    font-size:14.5px;
    color:var(--ink-soft);
  }

  /* ---------- FOCUS AREAS ---------- */
  .focus-grid{
    display:grid;
    grid-template-columns:repeat(4, 1fr);
    gap:1px;
    background:var(--line);
    border:1px solid var(--line);
  }
  .focus-card{
    background:var(--card);
    padding:26px 22px;
    min-height:150px;
    display:flex; flex-direction:column; justify-content:space-between;
    transition:background .2s ease;
  }
  .focus-card:hover{ background:var(--paper-2); }
  .focus-num{
    font-family:'IBM Plex Mono', monospace;
    font-size:11.5px;
    color:var(--signal-deep);
  }
  .focus-card h3{
    font-size:1.02rem;
    font-weight:560;
    margin-top:16px;
  }

  /* ---------- BIO ---------- */
  .bio-grid{
    display:grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap:56px;
  }
  .bio-grid p{ color:var(--ink-soft); margin-bottom:16px; font-size:1rem; }
  .bio-grid p:last-child{ margin-bottom:0; }

  .bio-photo-wrap{
    position:relative;
    max-width:280px;
    margin-bottom:28px;
  }
  .bio-photo-wrap::before{
    content:""; position:absolute; top:-8px; left:-8px;
    width:26px; height:26px;
    border-top:2px solid var(--signal);
    border-left:2px solid var(--signal);
  }
  .bio-photo-wrap::after{
    content:""; position:absolute; bottom:-8px; right:-8px;
    width:26px; height:26px;
    border-bottom:2px solid var(--signal);
    border-right:2px solid var(--signal);
  }
  .bio-photo{
    width:100%;
    aspect-ratio:3/4;
    object-fit:cover;
    object-position:top center;
    display:block;
    border:1px solid var(--line);
    filter:grayscale(12%) contrast(1.03);
  }
  .bio-photo-caption{
    font-family:'IBM Plex Mono', monospace;
    font-size:11px;
    letter-spacing:.06em;
    text-transform:uppercase;
    color:var(--ink-soft);
    margin-top:10px;
  }
  .stat-col{
    border-left:1px solid var(--line);
    padding-left:28px;
    display:flex; flex-direction:column; gap:26px;
  }
  .stat{ }
  .stat b{
    font-family:'Fraunces', serif;
    font-size:2.1rem;
    font-weight:560;
    display:block;
    color:var(--ink);
  }
  .stat span{
    font-family:'IBM Plex Mono', monospace;
    font-size:11.5px;
    color:var(--ink-soft);
    text-transform:uppercase;
    letter-spacing:.06em;
  }

  /* ---------- TIMELINE ---------- */
  .timeline{ position:relative; padding-left:26px; }
  .timeline::before{
    content:"";
    position:absolute; left:0; top:6px; bottom:6px;
    width:1px; background:var(--line);
  }
  .t-item{ position:relative; padding-bottom:38px; }
  .t-item:last-child{ padding-bottom:0; }
  .t-item::before{
    content:"";
    position:absolute; left:-30.5px; top:4px;
    width:9px; height:9px; border-radius:50%;
    background:var(--paper); border:2px solid var(--signal);
  }
  .t-year{
    font-family:'IBM Plex Mono', monospace;
    font-size:12px;
    color:var(--signal-deep);
    margin-bottom:4px;
  }
  .t-title{ font-weight:600; font-size:1rem; margin-bottom:2px; }
  .t-sub{ font-size:14px; color:var(--ink-soft); }
  .t-item.coach .t-title{ color:var(--court-deep); }
  .t-item.coach::before{ border-color:var(--court); background:var(--court); }

  /* ---------- PUBLICATIONS ---------- */
  .pub-tabs{
    display:flex; gap:8px; margin-bottom:30px; flex-wrap:wrap;
  }
  .pub-tab{
    font-family:'IBM Plex Mono', monospace;
    font-size:12px;
    padding:8px 14px;
    border:1px solid var(--line);
    background:var(--card);
    cursor:pointer;
    color:var(--ink-soft);
  }
  .pub-tab.active{ background:var(--ink); color:var(--paper); border-color:var(--ink); }

  .pub-list{ display:flex; flex-direction:column; }
  .pub-item{
    display:grid;
    grid-template-columns: 90px 1fr auto;
    gap:20px;
    align-items:start;
    padding:22px 0;
    border-top:1px solid var(--line);
  }
  .pub-list .pub-item:last-child{ border-bottom:1px solid var(--line); }
  .pub-year{
    font-family:'IBM Plex Mono', monospace;
    font-size:13px;
    color:var(--ink-soft);
    padding-top:2px;
  }
  .pub-title{ font-weight:600; font-size:15.5px; line-height:1.4; margin-bottom:6px; }
  .pub-meta{ font-size:13px; color:var(--ink-soft); }
  .pub-meta em{ font-style:italic; }
  .pub-index{
    font-family:'IBM Plex Mono', monospace;
    font-size:11px;
    color:var(--court-deep);
    border:1px solid var(--court);
    padding:4px 9px;
    height:fit-content;
    white-space:nowrap;
  }
  .pub-more{
    display:inline-flex; align-items:center; gap:8px;
    margin-top:30px;
    font-weight:600; font-size:14.5px;
    text-decoration:none;
    border-bottom:1.5px solid var(--signal);
    padding-bottom:2px;
  }

  /* ---------- BOOKS ---------- */
  .book-grid{
    display:grid;
    grid-template-columns:repeat(3, 1fr);
    gap:22px;
  }
  .book-card{
    background:var(--card);
    border:1px solid var(--line);
    padding:24px;
  }
  .book-role{
    font-family:'IBM Plex Mono', monospace;
    font-size:11px;
    color:var(--signal-deep);
    text-transform:uppercase;
    letter-spacing:.05em;
    margin-bottom:10px;
    display:block;
  }
  .book-card h3{ font-size:1.02rem; margin-bottom:8px; }
  .book-card p{ font-size:13.5px; color:var(--ink-soft); }

  /* ---------- METRICS STRIP ---------- */
  .metric-strip{
    background:var(--strip-bg);
    color:var(--strip-fg);
    padding:56px 0;
    border-bottom:1px solid var(--line);
  }
  .metric-grid{
    display:grid;
    grid-template-columns:repeat(6,1fr);
    gap:8px;
  }
  .metric-grid .stat b{ color:var(--strip-fg); font-size:2.4rem; }
  .metric-grid .stat span{ color:var(--strip-fg-muted); }

  /* ---------- CONTACT ---------- */
  .contact-grid{
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap:56px;
    align-items:start;
  }
  .contact-lede{ font-size:1.15rem; max-width:34ch; color:var(--ink-soft); margin-bottom:28px; }
  .contact-list{ list-style:none; }
  .contact-list li{
    border-top:1px solid var(--line);
    padding:16px 0;
    display:flex; justify-content:space-between; align-items:center;
  }
  .contact-list li:last-child{ border-bottom:1px solid var(--line); }
  .contact-label{
    font-family:'IBM Plex Mono', monospace;
    font-size:11.5px;
    text-transform:uppercase;
    letter-spacing:.06em;
    color:var(--ink-soft);
  }
  .contact-value{ font-weight:600; text-decoration:none; font-size:15px; }
  .contact-value:hover{ color:var(--signal-deep); }

  footer{
    padding:32px 0;
    font-family:'IBM Plex Mono', monospace;
    font-size:12px;
    color:var(--ink-soft);
    display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
  }

  /* ---------- RESPONSIVE ---------- */
  @media (max-width: 920px){
    .hero-grid{ grid-template-columns:1fr; }
    .bio-grid{ grid-template-columns:1fr; }
    .stat-col{ border-left:none; border-top:1px solid var(--line); padding-left:0; padding-top:24px; flex-direction:row; flex-wrap:wrap; }
    .focus-grid{ grid-template-columns:repeat(2,1fr); }
    .metric-grid{ grid-template-columns:repeat(3,1fr); row-gap:24px; }
    .contact-grid{ grid-template-columns:1fr; }
    .book-grid{ grid-template-columns:1fr; }
    .nav-links{ display:none; }
    .pub-item{ grid-template-columns:1fr; gap:6px; }
    .pub-index{ justify-self:flex-start; }
  }
  @media (max-width:560px){
    .focus-grid{ grid-template-columns:1fr; }
    .metric-grid{ grid-template-columns:repeat(2,1fr); }
    .wrap{ padding:0 20px; }
  }