/* ============================= TOKENS ============================= */
  :root{
    --paper:      #eef1f6;   /* page background (Slate & Cobalt)          */
    --nav:        #e5e9f0;   /* nav bar background                       */
    --paper-deep: #e3e8ef;   /* recessed panels, alternating sections     */
    --ink:        #10182b;   /* primary text                              */
    --ink-soft:   #3d4a63;   /* secondary text                            */
    --stamp:      #2456d6;   /* accent — cobalt blue                      */
    --gold:       #d1a92e;   /* foil accent, used only in the footer      */
    --hairline:   #0f2350;   /* dividers, borders                         */

    --display: "Josefin Sans", "Iowan Old Style", Georgia, serif;
    --body:    "Google Sans", "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
    --mono:    "IBM Plex Mono", "SF Mono", Consolas, monospace;

    --wrap: 1180px;
    --pad: clamp(1.5rem, 5vw, 4rem);
    --section-pad: clamp(4.5rem, 11vw, 8rem);
  }

  /* ============================= DARK MODE ============================= */
  html[data-theme-mode="dark"]{
    --paper:      #13151e;
    --nav:        #191b26;
    --paper-deep: #1b1e29;
    --ink:        #f2f1ec;
    --ink-soft:   #a7a9b4;
    --stamp:      #7b9cf0;
    --gold:       #ffb545;
    --hairline:   #333850;
  }

  html[data-theme-mode="dark"] .site-footer{ background:var(--paper-deep); color:var(--ink); }
  html[data-theme-mode="dark"] .brand img{ filter:invert(1); }
  html[data-theme-mode="dark"] .hero-mark{ filter:grayscale(1) invert(1); }
  html[data-theme-mode="dark"] .grain{ mix-blend-mode:overlay; opacity:.05; }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ scroll-behavior:smooth; scroll-padding-top:84px; }

  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:var(--body);
    font-size:16px;
    line-height:1.55;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }

  .grain{
    position:fixed; inset:0; z-index:1; pointer-events:none;
    opacity:.05; mix-blend-mode:multiply;
    background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  }

  header, main, footer{ position:relative; z-index:2; }

  h1,h2,h3{ font-family:var(--display); font-weight:600; margin:0; letter-spacing:-0.01em; }
  p{ margin:0; }
  a{ color:inherit; }
  ul{ margin:0; padding:0; list-style:none; }
  img{ max-width:100%; display:block; }

  .wrap{ max-width:var(--wrap); margin:0 auto; padding-left:var(--pad); padding-right:var(--pad); }


  a:focus-visible, button:focus-visible{
    outline:2px solid var(--stamp); outline-offset:3px;
  }

  /* ============================= NAV ============================= */
  .site-nav{
    position:fixed; top:0; left:0; right:0; z-index:50;
    background:var(--nav);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--hairline);
  }
  .nav-inner{
    max-width:var(--wrap); margin:0 auto; padding:0 var(--pad);
    height:72px; display:flex; align-items:center; justify-content:space-between;
  }
  .brand{ display:flex; align-items:center; gap:.65rem; text-decoration:none; color:var(--ink); }
  .brand img{ height:34px; width:auto; }
  .brand span{ font-family:var(--display); font-weight:600; font-size:1.08rem; letter-spacing:-.01em; margin-left:1em;}

  .nav-links{ display:flex; gap:2.1rem; align-items:center; }
  .nav-links a{
    font-family:var(--mono); font-size:.78rem; text-transform:uppercase; letter-spacing:.08em;
    text-decoration:none; color:var(--ink-soft);
    padding-bottom:3px; border-bottom:1px solid transparent;
    transition:color .2s ease, border-color .2s ease;
  }
  .nav-links a:hover{ color:var(--ink); border-color:var(--stamp); }
  .nav-links a.nav-cta{
    font-family:var(--mono); color:var(--ink);
    border:1px solid var(--ink); padding:.5rem .9rem; border-radius:2px;
  }
  .nav-links a.nav-cta:hover{ background:var(--ink); color:var(--paper); border-color:var(--ink); }

  .nav-toggle{ display:none; background:none; border:0; cursor:pointer; padding:.4rem; }
  .nav-toggle span{ display:block; width:24px; height:2px; background:var(--ink); margin:5px 0; transition:transform .25s ease, opacity .25s ease; }

  @media (max-width: 860px){
    .nav-links{
      position:fixed; top:72px; left:0; right:0;
      height:calc(100vh - 72px);
      height:calc(100dvh - 72px);
      overflow-y:auto;
      background:var(--paper); flex-direction:column; align-items:flex-start;
      padding:2rem var(--pad); gap:1.5rem; border-top:1px solid var(--hairline);
      transform:translateX(100%); transition:transform .3s ease;
    }
    .nav-links.open{ transform:translateX(0); }
    .nav-toggle{ display:block; }
    body.menu-open{ overflow:hidden; }
  }

  /* ============================= HERO ============================= */
  .hero{
    position:relative; padding:calc(72px + var(--section-pad)) 0 var(--section-pad);
    overflow:hidden;
  }
  .hero-mark{
    position:absolute; right:6%; top:16%; width:min(46vw, 620px);
    opacity:.06; pointer-events:none; filter:grayscale(1);
  }
  .hero-inner{ position:relative; }

  .hero h1{
    font-size:clamp(3rem, 8.2vw, 6.6rem);
    line-height:.95; margin:0 0 1.1rem; max-width:14ch;
  }
  .hero .role{
    font-family:var(--mono); font-size:clamp(.95rem, 1.6vw, 1.15rem);
    color:var(--ink-soft); letter-spacing:.02em; margin-bottom:1.6rem; max-width:38ch;
  }
  .hero .lede{
    font-size:clamp(1.05rem, 1.7vw, 1.25rem); color:var(--ink-soft);
    max-width:46ch; margin-bottom:2.4rem;
  }
  .hero-ctas{ display:flex; gap:1rem; flex-wrap:wrap; }

  .btn{
    font-family:var(--mono); font-size:.82rem; letter-spacing:.05em; text-transform:uppercase;
    text-decoration:none; padding:.9rem 1.6rem; border-radius:2px; display:inline-block;
    transition:transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
  }
  .btn-primary{ background:var(--ink); color:var(--paper); border:1px solid var(--ink); }
  .btn-primary:hover{ transform:translateY(-2px); }
  .btn-ghost{ background:transparent; color:var(--ink); border:1px solid var(--ink-soft); }
  .btn-ghost:hover{ border-color:var(--ink); transform:translateY(-2px); }

  .hero-meta{
    margin-top:3.5rem; padding-top:1.5rem; border-top:1px solid var(--hairline);
    display:flex; flex-wrap:wrap; gap:2.5rem;
  }
  .hero-meta div{ font-family:var(--mono); font-size:.72rem; color:var(--ink-soft); }
  .hero-meta strong{ display:block; font-family:var(--body); font-size:.95rem; color:var(--ink); font-weight:600; margin-bottom:.2rem; }

  /* ============================= SECTION SCAFFOLDING ============================= */
  section{ padding:var(--section-pad) 0; }
  .section-head{
    display:flex; justify-content:space-between; align-items:flex-end; gap:2rem;
    margin-bottom:3rem; flex-wrap:wrap;
  }
  .section-head h2{ font-size:clamp(1.9rem, 3.6vw, 2.7rem); }
  .section-num{ font-family:var(--mono); font-size:.78rem; color:var(--ink-soft); }

  .alt-bg{ background:var(--paper-deep); }

  .reveal{ opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease; }
  .reveal.is-visible{ opacity:1; transform:translateY(0); }

  /* ============================= ABOUT ============================= */
  .about-grid{ display:grid; grid-template-columns:1.2fr .8fr; gap:4rem; }
  .about-bio p{ font-size:clamp(1.05rem, 1.6vw, 1.2rem); color:var(--ink-soft); margin-bottom:1.2rem; max-width:56ch; }
  .about-bio p:first-child{ font-family:var(--display); font-size:clamp(1.3rem,2vw,1.6rem); color:var(--ink); font-weight:500; }

  .fact-sheet{ border-top:1px solid var(--hairline); }
  .fact-row{
    display:grid; grid-template-columns:9rem 1fr; gap:1rem;
    padding:1rem 0; border-bottom:1px solid var(--hairline);
  }
  .fact-row dt{ font-family:var(--mono); font-size:.72rem; letter-spacing:.08em; text-transform:uppercase; color:var(--stamp); }
  .fact-row dd{ margin:0; font-size:.95rem; color:var(--ink); }

  @media (max-width:820px){ .about-grid{ grid-template-columns:1fr; gap:2.5rem; } }

  /* ============================= EXPERTISE ============================= */
  .expertise-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--hairline); border:1px solid var(--hairline); }
  .expertise-card{ background:var(--paper); padding:2.2rem; }
  .expertise-card h3{ font-size:1.4rem; margin-bottom:.6rem; }
  .expertise-card p{ color:var(--ink-soft); font-size:.95rem; margin-bottom:1.2rem; }
  .tag-row{ display:flex; flex-wrap:wrap; gap:.5rem; }
  .tag{
    font-family:var(--mono); font-size:.7rem; letter-spacing:.03em;
    border:1px solid var(--ink-soft); color:var(--ink-soft);
    padding:.3rem .6rem; border-radius:2px;
  }
  @media (max-width:720px){ .expertise-grid{ grid-template-columns:1fr; } }

  /* ============================= WORK ============================= */
  .work-grid{ display:grid; grid-template-columns:repeat(6, 1fr); gap:1.75rem; }
  .work-card{
    grid-column:span 3; background:var(--paper); border:1px solid var(--hairline);
    padding:2.2rem; position:relative; overflow:hidden;
    transition:transform .25s ease, box-shadow .25s ease;
  }
  .work-card:hover{ transform:translateY(-4px); box-shadow:0 18px 30px -20px rgba(0,0,0,.4); }
  .work-card.feature{ grid-column:span 6; display:grid; grid-template-columns:1.1fr .9fr; gap:2.5rem; align-items:center; }
  @media (max-width:900px){ .work-card, .work-card.feature{ grid-column:span 6; grid-template-columns:1fr; } }

  .work-year{ font-family:var(--mono); font-size:.75rem; color:var(--ink-soft); margin-bottom:.8rem; display:block; }
  .work-card h3{ font-size:1.55rem; max-width:20ch; margin-bottom:.7rem; }
  .work-card.feature h3{ padding-right:0; font-size:clamp(1.8rem,3vw,2.3rem); }
  .work-card p{ color:var(--ink-soft); font-size:.95rem; margin-bottom:1.2rem; max-width:42ch; }
  .work-link{
    font-family:var(--mono); font-size:.78rem; text-transform:uppercase; letter-spacing:.05em;
    text-decoration:none; color:var(--ink); border-bottom:1px solid var(--stamp); padding-bottom:2px;
  }

  .work-card.is-extra{ display:none; }
  .work-grid.is-expanded .work-card.is-extra{ display:revert; }
  .work-more{ display:flex; justify-content:center; margin-top:2.5rem; }
  .work-more .btn{ cursor:pointer; }

  /* ============================= EXPERIENCE ============================= */
  .timeline{ border-top:1px solid var(--hairline); }
  .tl-row{
    display:grid; grid-template-columns:9rem 1fr auto; gap:1.5rem; align-items:baseline;
    padding:1.6rem 0; border-bottom:1px solid var(--hairline);
  }
  .tl-date{ font-family:var(--mono); font-size:.8rem; color:var(--stamp); }
  .tl-role h3{ font-size:1.15rem; margin-bottom:.25rem; }
  .tl-role p{ color:var(--ink-soft); font-size:.92rem; }
  .tl-loc{ font-family:var(--mono); font-size:.72rem; color:var(--ink-soft); text-align:right; white-space:nowrap; }
  @media (max-width:700px){
    .tl-row{ grid-template-columns:1fr; gap:.3rem; }
    .tl-loc{ text-align:left; }
  }

  /* ============================= KNOWLEDGE ============================= */
  .knowledge-intro{ color:var(--ink-soft); font-size:1.05rem; max-width:60ch; margin-bottom:2.5rem; }

  .graph-shell{
    display:grid; grid-template-columns:1fr 260px;
    border:1px solid var(--hairline); background:var(--paper-deep);
  }
  .graph-canvas{ position:relative; border-right:1px solid var(--hairline); }
  #knowledgeGraph{ width:100%; height:520px; display:block; cursor:grab; touch-action:none; }
  #knowledgeGraph:active{ cursor:grabbing; }

  .graph-legend{
    position:absolute; left:1.2rem; bottom:1.1rem; display:flex; gap:1.1rem; flex-wrap:wrap;
    font-family:var(--mono); font-size:.66rem; color:var(--ink-soft); text-transform:uppercase; letter-spacing:.05em;
    pointer-events:none;
  }
  .graph-legend span{ display:flex; align-items:center; gap:.4rem; }
  .legend-dot{ width:9px; height:9px; border-radius:50%; display:inline-block; flex:none; }
  .legend-dot.hub{ background:var(--stamp); }
  .legend-dot.page{ background:var(--paper); border:1.5px solid var(--ink-soft); }
  .legend-dot.tag{ background:var(--paper-deep); border:1.5px dashed var(--stamp); }

  .graph-search{ position:absolute; top:1.1rem; left:1.2rem; z-index:3; width:min(240px, 60%); }
  .graph-search-input{
    width:100%; font-family:var(--mono); font-size:.78rem; letter-spacing:.02em;
    background:var(--paper); border:1px solid var(--hairline); border-radius:2px;
    padding:.55rem .8rem; color:var(--ink); outline:none; box-shadow:0 6px 14px -10px rgba(0,0,0,.45);
  }
  .graph-search-input::placeholder{ color:var(--ink-soft); }
  .graph-search-input:focus{ border-color:var(--stamp); }
  .graph-search-results{
    list-style:none; margin:.4rem 0 0; padding:0;
    background:var(--paper); border:1px solid var(--hairline); border-radius:2px;
    max-height:220px; overflow-y:auto; box-shadow:0 10px 20px -12px rgba(0,0,0,.5);
  }
  .graph-search-results button{
    display:block; width:100%; text-align:left; background:none; border:0; cursor:pointer;
    font-family:var(--body); font-size:.85rem; color:var(--ink); padding:.55rem .8rem;
    border-bottom:1px solid var(--hairline);
  }
  .graph-search-results li:last-child button{ border-bottom:0; }
  .graph-search-results button:hover,
  .graph-search-results button.is-active{ background:var(--paper-deep); color:var(--stamp); }
  .graph-search-results .no-match{ padding:.55rem .8rem; font-size:.8rem; color:var(--ink-soft); font-style:italic; }

  .graph-panel{ padding:1.6rem; display:flex; flex-direction:column; }
  .graph-panel-kicker{ font-family:var(--mono); font-size:.66rem; text-transform:uppercase; letter-spacing:.08em; color:var(--stamp); margin-bottom:.9rem; }
  .graph-panel-empty{ color:var(--ink-soft); font-size:.85rem; }
  .graph-panel-type{ font-family:var(--mono); font-size:.66rem; text-transform:uppercase; letter-spacing:.05em; color:var(--ink-soft); margin-bottom:.3rem; }
  .graph-panel-title{ font-family:var(--display); font-size:1.25rem; margin-bottom:.7rem; }
  .graph-panel-body{ font-size:.85rem; color:var(--ink-soft); line-height:1.6; margin-bottom:.9rem; }
  .graph-panel-body li{ position:relative; padding-left:.9rem; margin-bottom:.45rem; list-style:none; }
  .graph-panel-body li::before{ content:"–"; position:absolute; left:0; color:var(--stamp); }
  .graph-panel-links{ font-family:var(--mono); font-size:.68rem; color:var(--ink-soft); padding-top:.9rem; border-top:1px solid var(--hairline); }

  .graph-caption{ margin-top:1.2rem; font-family:var(--mono); font-size:.72rem; color:var(--ink-soft); }
  .graph-caption code{ background:var(--paper-deep); border:1px solid var(--hairline); padding:.1rem .4rem; border-radius:2px; }

  /* node + link styling — drawn as SVG elements, coloured via the site tokens */
  .gnode{ cursor:pointer; }
  .gnode circle{ transition:opacity .15s ease; }
  .gnode.type-hub circle{ fill:var(--stamp); stroke:var(--stamp); stroke-width:1.5; }
  .gnode.type-page circle{ fill:var(--paper); stroke:var(--ink-soft); stroke-width:1.5; }
  .gnode.type-tag circle{ fill:var(--paper-deep); stroke:var(--stamp); stroke-width:1.5; stroke-dasharray:3 2; }
  .gnode text{ font-family:var(--mono); font-size:10px; fill:var(--ink-soft); pointer-events:none; }
  .gnode.type-hub text{ fill:var(--ink); font-weight:600; }
  .glink{ stroke:var(--hairline); stroke-width:1; opacity:.6; transition:opacity .15s ease, stroke .15s ease; }
  .gnode.is-dim{ opacity:.2; }
  .glink.is-dim{ opacity:.08; }
  .glink.is-active{ stroke:var(--stamp); opacity:1; }

  @media (max-width:820px){
    .graph-shell{ grid-template-columns:1fr; }
    .graph-canvas{ border-right:0; border-bottom:1px solid var(--hairline); }
    #knowledgeGraph{ height:420px; }
  }

  /* ============================= CONTACT ============================= */
  .contact-inner{ text-align:center; max-width:720px; margin:0 auto; }
  .contact h2{ font-size:clamp(2.2rem, 5vw, 3.6rem); margin-bottom:1.3rem; }
  .contact p{ color:var(--ink-soft); font-size:1.1rem; margin-bottom:2.2rem; }
  .contact-email-link{
    display:inline-block; font-family:var(--display); font-size:clamp(1.6rem, 4vw, 2.6rem);
    text-decoration:none; color:var(--ink);  padding-bottom:.3rem;
    transition:color .2s ease, border-color .2s ease;
  }
  .contact-email-link:hover{ color:var(--stamp); }

  /* ============================= FOOTER ============================= */
  .site-footer{ background:var(--ink); color:var(--paper); padding:4.5rem 0 2rem; }
  .footer-top{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:2rem; margin-bottom:3rem; }
  .footer-mark{ display:flex; align-items:center; gap:.75rem; }
  .footer-mark img{ height:40px; filter:invert(1); opacity:.92; }
  .footer-mark span{ font-family:var(--display); font-size:1.2rem; }
  .social-row{ display:flex; gap:.8rem; }
  .social-stamp{
    width:42px; height:42px; border-radius:50%; border:1.5px dashed var(--gold);
    color:var(--gold); font-family:var(--mono); font-size:.62rem; letter-spacing:.02em;
    display:flex; align-items:center; justify-content:center; text-decoration:none;
    transition:background .2s ease, color .2s ease;
  }
  .social-stamp:hover{ background:var(--gold); color:var(--ink); }
  .footer-bottom{
    display:flex; justify-content:space-between; flex-wrap:wrap; gap:1rem;
    padding-top:1.6rem; border-top:1px solid rgba(237,230,214,.18);
    font-family:var(--mono); font-size:.72rem; color:rgba(237,230,214,.6);
  }
  .footer-bottom a{ text-decoration:none; color:rgba(237,230,214,.6); }
  .footer-bottom a:hover{ color:var(--gold); }

  /* ============================= DARK MODE TOGGLE ============================= */
  .theme-toggle{
    position:fixed; right:1.5rem; bottom:1.5rem; z-index:60;
    width:48px; height:48px; border-radius:50%; border:1px solid var(--hairline);
    background:var(--paper-deep); color:var(--ink); display:flex; align-items:center; justify-content:center;
    cursor:pointer; box-shadow:0 10px 20px -10px rgba(0,0,0,.4);
    transition:transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
  }
  .theme-toggle:hover{ transform:translateY(-2px); border-color:var(--stamp); }
  .theme-toggle svg{ width:20px; height:20px; }
  .theme-toggle .icon-moon{ display:none; }
  html[data-theme-mode="dark"] .theme-toggle .icon-sun{ display:none; }
  html[data-theme-mode="dark"] .theme-toggle .icon-moon{ display:block; }

  @media (prefers-reduced-motion: reduce){
    html{ scroll-behavior:auto; }
    .reveal{ opacity:1; transform:none; transition:none; }
    .work-card, .btn, .theme-toggle{ transition:none; }
  }