@font-face{font-family:'Big Shoulders Display';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/big-shoulders-display-600.woff2) format('woff2');}
  @font-face{font-family:'Big Shoulders Display';font-style:normal;font-weight:800;font-display:swap;src:url(../fonts/big-shoulders-display-800.woff2) format('woff2');}
  @font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/ibm-plex-sans-400.woff2) format('woff2');}
  @font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/ibm-plex-sans-500.woff2) format('woff2');}
  @font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/ibm-plex-sans-600.woff2) format('woff2');}
  @font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/ibm-plex-mono-400.woff2) format('woff2');}
  @font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/ibm-plex-mono-500.woff2) format('woff2');}

  :root{
    --ground:#0E1F2E;
    --ground-2:#122539;
    --panel:#16293C;
    --panel-2:#1C3348;
    --ink:#EAF2F6;
    --muted:#89A3B2;
    --line:#2B4155;
    --line-strong:#3E5C74;
    --grid:rgba(111,184,214,0.06);
    --accent:#E8933B;
    --accent-ink:#191206;
    --accent2:#6FB8D6;
    --shadow: 0 20px 60px rgba(0,0,0,0.35);

    --font-display:'Big Shoulders Display','Arial Narrow',sans-serif;
    --font-body:'IBM Plex Sans',-apple-system,'Segoe UI',Roboto,sans-serif;
    --font-mono:'IBM Plex Mono','SFMono-Regular',Consolas,monospace;

    --wrap: 1160px;
    --pad: clamp(1.25rem, 4vw, 3rem);
    --radius: 3px;
    color-scheme: dark;
  }

  @media (prefers-color-scheme: light){
    :root{
      --ground:#EEF1F3;
      --ground-2:#E6EBED;
      --panel:#FFFFFF;
      --panel-2:#F4F7F8;
      --ink:#122330;
      --muted:#516B7C;
      --line:#CBD5DA;
      --line-strong:#9FB2BB;
      --grid:rgba(30,80,100,0.07);
      --accent:#BE6A21;
      --accent-ink:#FFFFFF;
      --accent2:#1C7891;
      --shadow: 0 20px 50px rgba(20,40,50,0.12);
      color-scheme: light;
    }
  }
  :root[data-theme="dark"]{
    --ground:#0E1F2E; --ground-2:#122539; --panel:#16293C; --panel-2:#1C3348;
    --ink:#EAF2F6; --muted:#89A3B2; --line:#2B4155; --line-strong:#3E5C74;
    --grid:rgba(111,184,214,0.06); --accent:#E8933B; --accent-ink:#191206; --accent2:#6FB8D6;
    --shadow: 0 20px 60px rgba(0,0,0,0.35); color-scheme: dark;
  }
  :root[data-theme="light"]{
    --ground:#EEF1F3; --ground-2:#E6EBED; --panel:#FFFFFF; --panel-2:#F4F7F8;
    --ink:#122330; --muted:#516B7C; --line:#CBD5DA; --line-strong:#9FB2BB;
    --grid:rgba(30,80,100,0.07); --accent:#BE6A21; --accent-ink:#FFFFFF; --accent2:#1C7891;
    --shadow: 0 20px 50px rgba(20,40,50,0.12); color-scheme: light;
  }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ scroll-behavior:smooth; }
  body{
    margin:0;
    background:var(--ground);
    color:var(--ink);
    font-family:var(--font-body);
    font-size:16px;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
    position:relative;
  }
  body::before{
    content:"";
    position:fixed; inset:0;
    background-image:
      linear-gradient(var(--grid) 1px, transparent 1px),
      linear-gradient(90deg, var(--grid) 1px, transparent 1px);
    background-size: 56px 56px;
    pointer-events:none;
    z-index:0;
  }
  main,header,footer{ position:relative; z-index:1; }

  h1,h2,h3{ font-family:var(--font-display); font-weight:800; margin:0; text-wrap:balance; }
  p{ margin:0; }
  a{ color:inherit; }
  ul{ margin:0; padding:0; list-style:none; }
  img,svg{ display:block; max-width:100%; }

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

  [data-i18n="nl"]{ display:none; }
  :root[data-locale="nl"] [data-i18n="en"]{ display:none; }
  :root[data-locale="nl"] [data-i18n="nl"]{ display:revert; }
  :root[data-locale="en"] [data-i18n="nl"]{ display:none; }

  a:focus-visible, button:focus-visible{
    outline:2px solid var(--accent2);
    outline-offset:3px;
  }

  /* ---------- topbar ---------- */
  .topbar{
    position:sticky; top:0; z-index:20;
    background:var(--ground);
    background:color-mix(in srgb, var(--ground) 88%, transparent);
    backdrop-filter: blur(10px);
    border-bottom:1px solid var(--line);
  }
  .topbar-inner{
    max-width:var(--wrap); margin-inline:auto; padding-inline:var(--pad);
    height:60px; display:flex; align-items:center; gap:clamp(1rem,3vw,2.5rem);
  }
  .brand{
    font-family:var(--font-mono); font-size:0.9rem; letter-spacing:0.06em;
    text-decoration:none; color:var(--ink); white-space:nowrap;
  }
  .brand b{ color:var(--accent); font-weight:600; }
  .nav{ display:flex; gap:clamp(0.9rem,2vw,1.6rem); flex:1; overflow-x:auto; scrollbar-width:none; }
  .nav::-webkit-scrollbar{ display:none; }
  .nav a{
    font-family:var(--font-mono); font-size:0.78rem; letter-spacing:0.05em; text-transform:uppercase;
    text-decoration:none; color:var(--muted); white-space:nowrap; padding:0.4rem 0; border-bottom:1px solid transparent;
    transition:color .15s ease, border-color .15s ease;
  }
  .nav a:hover{ color:var(--ink); border-color:var(--accent2); }
  .lang-switch{
    display:flex; align-items:center; border:1px solid var(--line-strong); border-radius:999px; padding:3px; gap:2px; flex-shrink:0;
    font-family:var(--font-mono);
  }
  .lang-switch button{
    appearance:none; border:0; background:transparent; color:var(--muted);
    font-family:var(--font-mono); font-size:0.72rem; letter-spacing:0.05em; font-weight:500;
    padding:0.3rem 0.65rem; border-radius:999px; cursor:pointer; transition:background .15s ease, color .15s ease;
  }
  .lang-switch button.active{ background:var(--accent); color:var(--accent-ink); }

  /* ---------- sheet header ---------- */
  .sheet-head{
    display:flex; align-items:baseline; gap:1rem; margin-bottom:clamp(2rem,5vw,3rem);
    border-bottom:1px solid var(--line); padding-bottom:1rem;
  }
  .sheet-index{ font-family:var(--font-display); font-weight:800; font-size:clamp(2.2rem,5vw,3.2rem); color:var(--line-strong); line-height:1; }
  .sheet-titles{ display:flex; flex-direction:column; gap:0.25rem; }
  .eyebrow{
    font-family:var(--font-mono); font-size:0.72rem; letter-spacing:0.16em; text-transform:uppercase; color:var(--accent2);
  }
  .sheet-title{ font-size:clamp(1.6rem,3.6vw,2.3rem); text-transform:uppercase; letter-spacing:0.01em; }

  .section{ padding-block:clamp(3.5rem,8vw,6rem); }
  .section:nth-of-type(even){ background:var(--ground-2); }

  .reveal{ opacity:0; transform:translateY(14px); transition:opacity .6s ease, transform .6s ease; }
  .reveal.in-view{ opacity:1; transform:none; }
  @media (prefers-reduced-motion: reduce){
    html{ scroll-behavior:auto; }
    .reveal{ opacity:1; transform:none; transition:none; }
    *,*::before,*::after{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; }
  }

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex; align-items:center; gap:0.5rem;
    font-family:var(--font-mono); font-size:0.82rem; letter-spacing:0.03em; text-decoration:none;
    padding:0.7rem 1.1rem; border:1px solid var(--line-strong); border-radius:var(--radius); color:var(--ink);
    transition:border-color .15s ease, background .15s ease, transform .15s ease;
  }
  .btn:hover{ border-color:var(--accent2); transform:translateY(-1px); }
  .btn-primary{ background:var(--accent); color:var(--accent-ink); border-color:var(--accent); font-weight:500; }
  .btn-primary:hover{ background:var(--accent); border-color:var(--accent); filter:brightness(1.08); }

  /* ---------- hero ---------- */
  .hero{ padding-block: clamp(3.5rem,10vw,6.5rem) clamp(3rem,7vw,5rem); position:relative; }
  .hero-inner{
    display:grid; grid-template-columns: 1.5fr 1fr; gap:clamp(2rem,5vw,4rem); align-items:end;
  }
  .hero-name{
    font-size:clamp(3.4rem,11vw,7.6rem); line-height:0.86; text-transform:uppercase; letter-spacing:-0.01em;
    margin-block: 0.6rem 1rem;
  }
  .hero-name em{ font-style:normal; color:var(--accent); }
  .hero-role{ font-family:var(--font-mono); font-size:clamp(1rem,2vw,1.15rem); color:var(--accent2); letter-spacing:0.02em; }
  .hero-tagline{ max-width:46ch; margin-top:1.1rem; color:var(--muted); font-size:1.05rem; }
  .hero-cta{ display:flex; flex-wrap:wrap; gap:0.7rem; margin-top:2rem; }

  .title-block{
    position:relative; border:1px solid var(--line-strong); background:var(--panel); padding:1.25rem 1.4rem;
    display:flex; flex-direction:column; gap:0.8rem; box-shadow:var(--shadow);
  }
  .title-block::before,.title-block::after,
  .contact-block::before,.contact-block::after{
    content:""; position:absolute; width:12px; height:12px; border-color:var(--accent2); opacity:0.8;
  }
  .title-block::before,.contact-block::before{ top:-1px; left:-1px; border-top:2px solid; border-left:2px solid; }
  .title-block::after,.contact-block::after{ bottom:-1px; right:-1px; border-bottom:2px solid; border-right:2px solid; }
  .tb-row{ display:flex; justify-content:space-between; gap:1rem; border-bottom:1px dashed var(--line); padding-bottom:0.6rem; }
  .tb-row:last-child{ border-bottom:0; padding-bottom:0; }
  .tb-key{ font-family:var(--font-mono); font-size:0.7rem; letter-spacing:0.1em; text-transform:uppercase; color:var(--muted); }
  .tb-val{ font-family:var(--font-mono); font-size:0.82rem; text-align:right; }

  /* ---------- about ---------- */
  .about-grid{ display:grid; grid-template-columns: 1.4fr 1fr; gap:clamp(2rem,5vw,3.5rem); align-items:start; }
  .about-text{ font-size:1.12rem; color:var(--ink); max-width:56ch; }
  .about-text + .about-text{ margin-top:1rem; color:var(--muted); }
  .callout{
    margin-top:1.6rem; padding-left:1.2rem; border-left:2px solid var(--accent);
    font-family:var(--font-mono); font-size:0.82rem; color:var(--muted); max-width:50ch;
  }
  .callout b{ color:var(--accent); }

  .skills{ margin-top:clamp(2.5rem,6vw,4rem); display:grid; grid-template-columns: 1.4fr 1fr; gap:clamp(2rem,5vw,3.5rem); }
  .skill-label{ font-family:var(--font-mono); font-size:0.72rem; letter-spacing:0.14em; text-transform:uppercase; color:var(--muted); margin-bottom:0.9rem; }
  .chips{ display:flex; flex-wrap:wrap; gap:0.6rem; }
  .chips li{
    font-family:var(--font-mono); font-size:0.8rem; padding:0.5rem 0.8rem; border:1px solid var(--line);
    border-radius:var(--radius); background:var(--panel); color:var(--ink);
  }
  .lang-list li{ display:flex; justify-content:space-between; gap:1rem; padding:0.6rem 0; border-bottom:1px solid var(--line); font-size:0.92rem; }
  .lang-list li:last-child{ border-bottom:0; }
  .lang-list .tag{ font-family:var(--font-mono); font-size:0.76rem; color:var(--muted); }

  /* ---------- experience belt ---------- */
  .belt{ position:relative; padding-left:2.4rem; max-width:70ch; }
  .belt-line{
    position:absolute; left:6px; top:10px; bottom:10px; width:2px;
    background-image: repeating-linear-gradient(180deg, var(--accent2) 0 8px, transparent 8px 16px);
    background-size: 2px 32px;
  }
  @media (prefers-reduced-motion: no-preference){
    .belt-line{ animation: beltmove 1.6s linear infinite; }
  }
  @keyframes beltmove{ from{ background-position:0 0; } to{ background-position:0 32px; } }

  .belt-node{ position:relative; padding-bottom:clamp(2rem,5vw,3rem); }
  .belt-node:last-child{ padding-bottom:0; }
  .node-dot{
    position:absolute; left:-2.4rem; top:6px; width:14px; height:14px; border-radius:50%;
    background:var(--ground-2); border:2px solid var(--line-strong);
  }
  .belt-node.current .node-dot{ border-color:var(--accent); background:var(--accent); box-shadow:0 0 0 4px color-mix(in srgb, var(--accent) 25%, transparent); }
  .node-role{ font-family:var(--font-display); font-weight:700; font-size:1.5rem; text-transform:uppercase; }
  .node-meta{ font-family:var(--font-mono); font-size:0.82rem; color:var(--accent2); margin-top:0.2rem; }
  .node-meta .dates{ color:var(--muted); }
  .node-desc{ margin-top:0.7rem; color:var(--muted); max-width:52ch; }
  .node-tag{
    display:inline-block; margin-left:0.6rem; font-family:var(--font-mono); font-size:0.68rem; letter-spacing:0.08em;
    text-transform:uppercase; color:var(--accent-ink); background:var(--accent); padding:0.15rem 0.5rem; border-radius:999px;
    vertical-align:middle; position:relative; top:-2px;
  }

  /* ---------- projects ---------- */
  .projects-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:1.4rem; }
  .project-card{
    position:relative; border:1px solid var(--line); background:var(--panel); padding:1.6rem;
    display:flex; flex-direction:column; gap:0.9rem; transition:border-color .15s ease, transform .15s ease;
  }
  .project-card:hover{ border-color:var(--accent2); transform:translateY(-3px); }
  .project-glyph{ color:var(--accent2); }
  .project-kicker{ font-family:var(--font-mono); font-size:0.7rem; letter-spacing:0.1em; text-transform:uppercase; color:var(--muted); }
  .project-title{ font-family:var(--font-display); font-weight:700; font-size:1.35rem; text-transform:uppercase; }
  .project-desc{ color:var(--muted); font-size:0.95rem; }

  /* ---------- education ---------- */
  .edu-list{ display:flex; flex-direction:column; }
  .edu-row{
    display:grid; grid-template-columns: 1fr auto; gap:1rem; padding:1.1rem 0; border-bottom:1px solid var(--line);
    align-items:baseline;
  }
  .edu-row:first-child{ padding-top:0; }
  .edu-inst{ font-family:var(--font-display); font-weight:700; font-size:1.2rem; text-transform:uppercase; }
  .edu-prog{ color:var(--muted); font-size:0.92rem; margin-top:0.15rem; }
  .edu-years{ font-family:var(--font-mono); font-size:0.85rem; color:var(--accent2); font-variant-numeric:tabular-nums; white-space:nowrap; }
  .cert-list{ margin-top:2rem; display:flex; flex-wrap:wrap; gap:0.6rem 2rem; }
  .cert-list li{ font-family:var(--font-mono); font-size:0.8rem; color:var(--muted); }
  .cert-list b{ color:var(--ink); font-weight:500; }

  /* ---------- contact / footer ---------- */
  .contact-inner{ display:grid; grid-template-columns: 1fr 1.2fr; gap:clamp(2rem,5vw,4rem); align-items:start; }
  .contact-lede{ font-size:1.4rem; font-family:var(--font-display); font-weight:700; text-transform:uppercase; max-width:16ch; }
  .contact-sub{ color:var(--muted); margin-top:0.8rem; max-width:36ch; }
  .contact-block{ position:relative; border:1px solid var(--line-strong); background:var(--panel); box-shadow:var(--shadow); }
  .cb-row{ display:flex; justify-content:space-between; gap:1rem; padding:0.85rem 1.2rem; border-bottom:1px solid var(--line); }
  .cb-row:last-child{ border-bottom:0; }
  .cb-key{ font-family:var(--font-mono); font-size:0.7rem; letter-spacing:0.1em; text-transform:uppercase; color:var(--muted); }
  .cb-val{ font-family:var(--font-mono); font-size:0.85rem; text-align:right; }
  .cb-val a{ text-decoration:none; color:var(--ink); border-bottom:1px solid var(--line-strong); }
  .cb-val a:hover{ color:var(--accent2); border-color:var(--accent2); }

  .colophon{ padding-block:1.6rem; border-top:1px solid var(--line); }
  .colophon .wrap{ display:flex; justify-content:space-between; gap:1rem; flex-wrap:wrap; }
  .colophon p{ font-family:var(--font-mono); font-size:0.72rem; color:var(--muted); letter-spacing:0.03em; }

  @media (max-width: 860px){
    .hero-inner, .about-grid, .skills, .contact-inner{ grid-template-columns:1fr; }
    .title-block{ order:-1; }
    .edu-row{ grid-template-columns:1fr; }
    .edu-years{ order:-1; color:var(--muted); }
    .nav{ gap:1rem; }
  }