:root{
    --bg: #FAFAF6;
    --ink: #1B1D1B;
    --ink-soft: #52564F;
    --rule: #DEDCD1;
    --accent: #3F6E63;      /* patina teal — nods to catalysts / mineral chemistry */
    --accent-soft: #E7EEEA;
    --paper: #FFFFFF;
  }

  *{ box-sizing: border-box; }

  html{ scroll-behavior: smooth; }

  body{
    margin:0;
    background: var(--bg);
    color: var(--ink);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 17px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

  /* faint lattice motif — evokes a crystal structure, kept quiet */
  .lattice{
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.5;
    background-image:
      radial-gradient(circle at 1px 1px, rgba(63,110,99,0.14) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: linear-gradient(to bottom, black, transparent 75%);
  }

  .wrap{
    position: relative;
    z-index: 1;
    max-width: 720px;
    margin: 0 auto;
    padding: 0 28px;
  }

  header.site{
    padding: 56px 0 0;
  }

  .eyebrow{
    font-family: 'IBM Plex Mono', monospace;
    font-size: 15px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 4px
  }

  .brand{
    display: flex;
    align-items: flex-end;
    gap: 9px;
  }

  .logo-mark{
    height: 50px;
    width: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  .logo-mark img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }
  .logo-mark .placeholder{
    font-family: 'IBM Plex Mono', monospace;
    font-size: 8px;
    color: var(--accent);
  }

  .lang-toggle{
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12.5px;
    color: var(--ink-soft);
  }
  .lang-toggle a{ color: var(--ink-soft); text-decoration: underline; text-underline-offset: 3px; }
  .lang-toggle a.current{ color: var(--ink); font-weight: 500; text-decoration: none; }

  header.site .topbar{
    display:flex;
    justify-content: space-between;
    align-items: baseline;
  }

  main.hero{
    display: grid;
    grid-template-columns: 148px 1fr;
    gap: 32px;
    align-items: start;
    padding: 36px 0 8px;
  }

  .portrait{
    width: 148px;
    height: auto;
    border-radius: 6px;
    overflow: hidden;
    background: var(--accent-soft);
    border: 1px solid var(--rule);
  }
  .portrait img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }
  .portrait .placeholder{
    width:100%; height:100%;
    display:flex; align-items:center; justify-content:center;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--accent);
    text-align: center;
    padding: 10px;
    line-height: 1.4;
  }

  h1{
    font-family: 'Newsreader', Georgia, serif;
    font-weight: 500;
    font-size: 40px;
    line-height: 1.1;
    margin: 0 0 6px;
    letter-spacing: -0.01em;
  }

  .role{
    font-family: 'Newsreader', Georgia, serif;
    font-style: italic;
    font-weight: 400;
    font-size: 19px;
    color: var(--ink-soft);
    margin: 0;
  }

  .bio{
    padding: 28px 0 6px;
    max-width: 62ch;
  }

  .bio p{ margin: 0 0 16px; color: var(--ink); }
  .bio p:last-child{ margin-bottom: 0; }
  .bio a{ color: var(--accent); text-decoration: none; border-bottom: 1px solid rgba(63,110,99,0.35); }
  .bio a:hover{ border-bottom-color: var(--accent); }

  .rule{
    border: 0;
    border-top: 1px solid var(--rule);
    margin: 32px 0;
  }

  .links{
    padding-bottom: 64px;
  }
  .links .eyebrow{ display:block; margin-bottom: 14px; }

  .link-list{
    list-style: none;
    margin: 0; padding: 0;
    display: flex;
    flex-direction: column;
  }
  .link-list li{
    border-top: 1px solid var(--rule);
  }
  .link-list li:last-child{ border-bottom: 1px solid var(--rule); }

  .link-list a{
    display:flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 4px;
    text-decoration: none;
    color: var(--ink);
    font-size: 16px;
    transition: color 0.15s ease, padding-left 0.15s ease;
  }
  .link-list a .name{ font-weight: 500; }
  .link-list a .arrow{
    font-family: 'IBM Plex Mono', monospace;
    color: var(--ink-soft);
    transition: transform 0.15s ease;
  }
  .link-list a:hover{ color: var(--accent); padding-left: 8px; }
  .link-list a:hover .arrow{ transform: translateX(3px); color: var(--accent); }
  .link-list a:focus-visible{
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 3px;
  }

  footer{
    padding: 0 0 48px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--ink-soft);
  }

  @media (max-width: 520px){
    h1{ font-size: 32px; }
    main.hero{
      grid-template-columns: 1fr;
    }
    .portrait{ width: 108px; height: 108px; }
  }

  @media (prefers-reduced-motion: reduce){
    html{ scroll-behavior: auto; }
    .link-list a, .link-list a .arrow{ transition: none; }
  }