:root{
    --paper:#EDE9DF;
    --ink:#201B14;
    --ink-soft:#5B5346;
    --line:#C9C0AC;
    --brass:#A8752A;
    --brass-dim:#8C6323;
    --cyan:#2E8C87;
    --sheet-w: 148px;
  }
  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]){
      --paper:#16140F;
      --ink:#E8E2D2;
      --ink-soft:#A69C87;
      --line:#3A3427;
      --brass:#D9A44E;
      --brass-dim:#C08A34;
      --cyan:#57C2BC;
    }
  }
  :root[data-theme="dark"]{
    --paper:#16140F;
    --ink:#E8E2D2;
    --ink-soft:#A69C87;
    --line:#3A3427;
    --brass:#D9A44E;
    --brass-dim:#C08A34;
    --cyan:#57C2BC;
  }

  *{box-sizing:border-box;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:'Newsreader', Georgia, 'Times New Roman', serif;
    font-size:17px;
    line-height:1.6;
  }
  a{color:var(--brass);}
  a:hover{color:var(--brass-dim);}
  a:focus-visible, button:focus-visible{outline:2px solid var(--brass); outline-offset:3px;}

  .mono{
    font-family:'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  }
  .eyebrow{
    font-family:'IBM Plex Mono', monospace;
    font-size:11px;
    letter-spacing:.12em;
    text-transform:uppercase;
    color:var(--ink-soft);
  }
  h1,h2,h3{
    font-family:'Fraunces', Georgia, serif;
    text-wrap:balance;
    margin:0;
    font-weight:600;
  }

  /* ---- masthead ---- */
  .masthead{
    max-width:920px;
    margin:0 auto;
    padding:56px 28px 40px;
    display:flex;
    justify-content:space-between;
    align-items:baseline;
    gap:16px;
    border-bottom:1px solid var(--line);
  }
  .wordmark{
    font-family:'Fraunces', serif;
    font-weight:700;
    font-size:20px;
    letter-spacing:.01em;
  }
  .masthead nav{
    display:flex;
    gap:22px;
  }
  .masthead nav a{
    font-family:'IBM Plex Mono', monospace;
    font-size:12px;
    letter-spacing:.06em;
    text-transform:uppercase;
    text-decoration:none;
    color:var(--ink-soft);
    border-bottom:1px solid transparent;
    padding-bottom:2px;
  }
  .masthead nav a:hover{color:var(--brass); border-color:var(--brass);}

  /* ---- hero / Fig 1 ---- */
  .hero{
    max-width:920px;
    margin:0 auto;
    padding:64px 28px 20px;
    display:grid;
    grid-template-columns: var(--sheet-w) 1fr;
    gap:24px;
  }
  .waveform-wrap{
    display:grid;
    width:100%;
    max-width:560px;
  }
  .waveform-wrap > *{
    grid-area:1 / 1;
    width:100%;
  }
  .lissajous{
    height:200px;
    align-self:center;
    opacity:.18;
  }
  .lissajous polyline{
    fill:none;
    stroke:var(--cyan);
    stroke-width:1.4;
  }
  .hero .sheet-label{padding-top:10px;}
  .hero-main{display:flex; flex-direction:column; gap:22px;}
  .hz-numeral{
    font-family:'Fraunces', serif;
    font-weight:700;
    font-size:clamp(56px, 10vw, 108px);
    line-height:.95;
    letter-spacing:-.01em;
  }
  .hz-numeral small{
    font-size:.32em;
    font-weight:400;
    color:var(--ink-soft);
    margin-left:8px;
  }
  .role-line{
    font-family:'IBM Plex Mono', monospace;
    font-size:14px;
    color:var(--ink-soft);
  }
  .waveform{width:100%; height:auto; align-self:end;}
  .waveform path.trace{fill:none; stroke:var(--brass); stroke-width:2;}
  .waveform .grid-line{stroke:var(--line); stroke-width:1;}
  .waveform text{
    font-family:'IBM Plex Mono', monospace;
    font-size:10.5px;
    fill:var(--ink-soft);
  }


  /* ---- plate (embedded artwork) ---- */
  .plate{
    border:1px solid var(--line);
    padding:10px;
    background:color-mix(in srgb, var(--ink) 4%, transparent);
  }
  .plate img{
    display:block;
    width:100%;
    height:auto;
  }
  .plate-caption{
    font-family:'IBM Plex Mono', monospace;
    font-size:11px;
    color:var(--ink-soft);
    letter-spacing:.02em;
    margin-top:10px;
  }
  .plate-caption b{color:var(--ink); font-weight:500;}

  /* ---- figure sections ---- */
  .figure{
    max-width:920px;
    margin:0 auto;
    padding:44px 28px;
    display:grid;
    grid-template-columns: var(--sheet-w) 1fr;
    gap:24px;
    border-top:1px solid var(--line);
  }
  .sheet-label{
    font-family:'IBM Plex Mono', monospace;
    font-size:12px;
    color:var(--ink-soft);
    line-height:1.7;
  }
  .sheet-label .fig-no{
    display:block;
    color:var(--ink);
    font-size:13px;
    margin-bottom:2px;
  }
  .sheet-label .fig-no::before{
    content:"";
    display:inline-block;
    width:6px; height:6px;
    border-radius:50%;
    background:var(--cyan);
    margin-right:7px;
    vertical-align:middle;
  }
  .figure h2{
    font-size:26px;
    margin-bottom:16px;
  }
  .figure > div:last-child{max-width:62ch;}
  .figure p{margin:0 0 14px;}
  .figure p:last-child{margin-bottom:0;}

  /* ---- docket (patents/tech) ---- */
  .docket{display:flex; flex-direction:column;}
  .docket-row{
    display:grid;
    grid-template-columns: 128px 1fr auto;
    gap:16px;
    align-items:baseline;
    padding:14px 0;
    border-top:1px solid var(--line);
  }
  .docket-row:first-child{border-top:none;}
  .docket-num{
    font-family:'IBM Plex Mono', monospace;
    font-size:12.5px;
    color:var(--ink-soft);
  }
  .docket-title{font-family:'Fraunces', serif; font-weight:600; font-size:16.5px;}
  .docket-title a{color:inherit; text-decoration:none; border-bottom:1px solid var(--brass);}
  .docket-title a:hover{color:var(--brass-dim);}
  .docket-desc{
    font-family:'Newsreader', serif;
    font-size:14.5px;
    color:var(--ink-soft);
    margin-top:3px;
  }
  .badge{
    font-family:'IBM Plex Mono', monospace;
    font-size:10.5px;
    letter-spacing:.06em;
    text-transform:uppercase;
    color:var(--brass-dim);
    border:1px solid var(--brass);
    border-radius:2px;
    padding:3px 7px;
    white-space:nowrap;
    align-self:start;
  }
  :root[data-theme="dark"] .badge, @media (prefers-color-scheme: dark){}

  /* ---- writing / archive list ---- */
  .paper-list{display:flex; flex-direction:column;}
  .paper-row{
    padding:16px 0;
    border-top:1px solid var(--line);
  }
  .paper-row:first-child{border-top:none;}
  .paper-row a{
    font-family:'Fraunces', serif;
    font-weight:600;
    font-size:17px;
    text-decoration:none;
  }
  .paper-row a:hover{text-decoration:underline;}
  .paper-meta{
    font-family:'IBM Plex Mono', monospace;
    font-size:11.5px;
    color:var(--ink-soft);
    margin-top:4px;
    letter-spacing:.02em;
  }

  /* ---- contact ---- */
  .contact-line{
    display:flex;
    align-items:baseline;
    gap:10px;
    font-family:'IBM Plex Mono', monospace;
    font-size:15px;
    margin-bottom:10px;
  }
  .contact-line .k{color:var(--ink-soft); min-width:88px;}

  footer{
    max-width:920px;
    margin:0 auto;
    padding:30px 28px 60px;
    border-top:1px solid var(--line);
    font-family:'IBM Plex Mono', monospace;
    font-size:11px;
    color:var(--ink-soft);
    display:flex;
    justify-content:space-between;
    flex-wrap:wrap;
    gap:10px;
  }

  @media (max-width: 640px){
    .hero, .figure{grid-template-columns: 1fr;}
    .sheet-label{
      display:flex; gap:10px; align-items:baseline;
      border-bottom:1px dashed var(--line);
      padding-bottom:8px; margin-bottom:4px;
    }
    .docket-row{grid-template-columns: 1fr; row-gap:4px;}
    .masthead{flex-direction:column; align-items:flex-start; gap:10px;}
  }

  @media (prefers-reduced-motion: no-preference){
    .figure, .hero-main{animation:rise .5s ease-out both;}
  }
  @keyframes rise{from{opacity:0; transform:translateY(6px);} to{opacity:1; transform:translateY(0);}}