@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700&family=Lora:ital,wght@0,400;0,500;0,600;0,700;1,500&family=Public+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

  :root{
    --ink:#2A2118;
    --ink-soft:#6E6153;
    --paper:#FAF8F2;
    --surface:#FFFFFF;
    --line:#E7E1D2;
    --accent:#3F7EA6;
    --accent-soft:#E3EEF3;
    --gold:#3F7EA6;
    --gold-soft:#E3EEF3;
    --placeholder:#8F8672;
    --placeholder-bg:#F1EDE3;
    --shadow: 0 1px 2px rgba(42,33,24,.07), 0 8px 24px rgba(42,33,24,.07);
  }
  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]){
      --ink:#F3EAD9;
      --ink-soft:#C7B9A4;
      --paper:#1C140D;
      --surface:#271D14;
      --line:#3E3020;
      --accent:#6FB4DB;
      --accent-soft:#17262E;
      --gold:#6FB4DB;
      --gold-soft:#17262E;
      --placeholder:#8A8267;
      --placeholder-bg:#211D14;
      --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
    }
  }
  :root[data-theme="dark"]{
    --ink:#F3EAD9;
    --ink-soft:#C7B9A4;
    --paper:#1C140D;
    --surface:#271D14;
    --line:#3E3020;
    --accent:#6FB4DB;
    --accent-soft:#17262E;
    --gold:#6FB4DB;
    --gold-soft:#17262E;
    --placeholder:#8A8267;
    --placeholder-bg:#211D14;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  }

  *{box-sizing:border-box;}
  body{
    background:var(--paper);
    color:var(--ink);
    font-family:'Public Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,.serif{font-family:'Lora', Georgia, serif;}
  h1,h2,h3{text-wrap:balance; color:var(--ink); font-weight:600; margin:0;}
  .hero h1{font-family:'Fraunces', Georgia, serif;}
  .mono{font-family:'IBM Plex Mono', 'Courier New', monospace;}
  a{color:var(--accent);}
  p{margin:0 0 1em;}

  /* ---------- shell ---------- */
  .topbar{
    position:sticky; top:0; z-index:20;
    background:var(--paper);
    border-bottom:1px solid var(--line);
  }
  .proto-ribbon{
    background:var(--gold-soft);
    color:var(--gold);
    font-family:'IBM Plex Mono', monospace;
    font-size:.72rem;
    letter-spacing:.06em;
    text-transform:uppercase;
    text-align:center;
    padding:.5rem 1rem;
    border-bottom:1px solid var(--line);
  }
  .nav{
    max-width:1080px; margin:0 auto;
    display:flex; align-items:center; justify-content:space-between;
    padding:1rem 1.5rem;
    gap:1.5rem;
  }
  .logo{
    display:flex;
    align-items:center;
    gap:.5rem;
    font-family:'Fraunces', Georgia, serif;
    font-weight:600;
    font-style:normal;
    font-size:1.3rem;
    letter-spacing:-.01em;
    color:var(--ink);
    text-decoration:none;
    white-space:nowrap;
    cursor:pointer;
  }
  .logo-mark{ flex:none; }
  .navlinks{display:flex; gap:1.75rem; list-style:none; margin:0; padding:0; flex-wrap:wrap;}
  .navlinks button{
    font-family:'Public Sans', sans-serif;
    font-size:.92rem; font-weight:600;
    background:none; border:none; cursor:pointer;
    color:var(--ink-soft); padding:.25rem 0;
    border-bottom:2px solid transparent;
  }
  .navlinks button.active, .navlinks button:hover{ color:var(--ink); border-bottom-color:var(--accent); }

  main{max-width:1080px; margin:0 auto; padding:0 1.5rem 5rem;}

  /* ---------- home ---------- */
  .hero{padding:3.5rem 0 2.5rem; border-bottom:1px solid var(--line); margin-bottom:2.5rem; text-align:center;}
  .hero h1{font-size:clamp(2rem, 4.2vw, 2.9rem); line-height:1.12; max-width:16ch; margin:0 auto;}
  .hero .lede{font-size:1.15rem; color:var(--ink-soft); max-width:52ch; margin:1rem auto 0;}
  .stat-strip{
    display:flex; flex-wrap:wrap; gap:0 2.25rem; margin-top:1.75rem;
    font-family:'IBM Plex Mono', monospace; font-size:.82rem; color:var(--ink-soft);
  }
  .stat-strip strong{color:var(--ink); font-weight:500;}

  .section-label{
    font-family:'IBM Plex Mono', monospace; font-size:.78rem; letter-spacing:.08em;
    text-transform:uppercase; color:var(--gold); margin-bottom:.75rem; display:block;
  }

  .search-block{ margin-bottom:2.5rem; }
  .search-input-wrap{
    position:relative; display:flex; align-items:center;
    border:1px solid var(--line); border-radius:6px; background:var(--surface);
    transition:border-color .15s ease;
  }
  .search-input-wrap:focus-within{ border-color:var(--accent); }
  .search-icon{ position:absolute; left:1rem; color:var(--ink-soft); pointer-events:none; }
  .search-input{
    width:100%; border:none; background:none; outline:none;
    font-family:'Public Sans', sans-serif; font-size:1rem; color:var(--ink);
    padding:.95rem 1rem .95rem 2.8rem;
  }
  .search-input::placeholder{ color:var(--ink-soft); }
  .search-meta{
    font-family:'IBM Plex Mono', monospace; font-size:.72rem; color:var(--ink-soft);
    margin-top:.6rem; padding-left:.2rem;
  }
  .no-results{
    font-size:.92rem; color:var(--ink-soft); background:var(--surface);
    border:1px dashed var(--line); border-radius:6px; padding:1.5rem;
    margin-bottom:3rem;
  }

  .filter-block{ margin-bottom:2.5rem; }
  .filter-row{ display:flex; flex-wrap:wrap; gap:.5rem; margin-top:.75rem; }
  .filter-row:first-child{ margin-top:0; }
  .filter-chip{
    font-family:'IBM Plex Mono', monospace; font-size:.74rem; letter-spacing:.01em;
    background:var(--surface); border:1px solid var(--line); color:var(--ink-soft);
    padding:.4rem .8rem; border-radius:999px; cursor:pointer; transition:all .15s ease;
  }
  .filter-chip:hover{ border-color:var(--accent); color:var(--ink); }
  .filter-chip.active{ background:var(--accent); border-color:var(--accent); color:#fff; }
  .filter-clear{
    font-family:'IBM Plex Mono', monospace; font-size:.72rem; color:var(--placeholder);
    background:none; border:none; text-decoration:underline; cursor:pointer; padding:.4rem 0;
  }

  .guide-grid{display:grid; grid-template-columns:repeat(auto-fit, minmax(280px,1fr)); gap:1.5rem; margin-bottom:3rem;}
  .guide-card{
    background:var(--surface); border:1px solid var(--line); border-radius:6px;
    padding:1.5rem; display:flex; flex-direction:column; gap:.85rem;
    cursor:pointer; transition:transform .15s ease, box-shadow .15s ease;
    text-align:left; width:100%; font-family:inherit; color:inherit;
    text-decoration:none;
  }
  .guide-card[hidden]{display:none;}
  .guide-card:hover{transform:translateY(-2px); box-shadow:var(--shadow);}
  .guide-card .byline{font-family:'IBM Plex Mono', monospace; font-size:.72rem; color:var(--gold); letter-spacing:.03em;}
  .guide-card h3{font-size:1.3rem;}
  .guide-card .dek{color:var(--ink-soft); font-size:.94rem; margin:0;}
  .guide-card .arrow{font-family:'IBM Plex Mono',monospace; font-size:.85rem; color:var(--ink-soft); margin-top:auto;}

  .method-teaser{
    display:grid; grid-template-columns:repeat(auto-fit, minmax(220px,1fr)); gap:1.5rem;
    background:var(--surface); border:1px solid var(--line); border-radius:6px; padding:2rem; margin-bottom:1rem;
  }
  .method-teaser .step{padding-left:2.4rem; position:relative;}
  .method-teaser .step .num{
    position:absolute; left:0; top:0;
    font-family:'IBM Plex Mono', monospace; font-size:.85rem; color:var(--accent);
    width:1.8rem; height:1.8rem; border:1px solid var(--accent); border-radius:50%;
    display:flex; align-items:center; justify-content:center;
  }
  .method-teaser h4{font-size:1rem; font-weight:600; margin:0 0 .35rem;}
  .method-teaser p{font-size:.9rem; color:var(--ink-soft); margin:0;}

  /* ---------- article ---------- */
  .disclosure-bar{
    color:var(--ink-soft); font-size:.8rem; margin-bottom:2rem;
    padding-bottom:.9rem; border-bottom:1px solid var(--line);
    display:flex; gap:.5rem; align-items:baseline; flex-wrap:wrap;
  }
  .disclosure-bar strong{color:var(--ink-soft); font-family:'IBM Plex Mono', monospace; font-size:.7rem; text-transform:uppercase; letter-spacing:.04em; white-space:nowrap; font-weight:500;}
  .disclosure-bar a{ color:var(--ink-soft); text-decoration:underline; }

  .article-byline{
    font-family:'IBM Plex Mono', monospace; font-size:.78rem; color:var(--gold);
    letter-spacing:.03em; margin-bottom:.6rem; display:block;
  }
  .article{max-width:800px; margin:0 auto;}
  .article h1{font-size:clamp(1.7rem,3.4vw,2.35rem); margin-bottom:.5rem;}
  .article .dek{font-size:1.08rem; color:var(--ink-soft); max-width:56ch; margin-bottom:2rem;}

  .article h2{font-size:1.35rem; margin:2.4rem 0 .9rem;}
  .article p{color:var(--ink); font-size:1.02rem;}

  .thread-quote{
    border-left:3px solid var(--accent); background:var(--accent-soft);
    border-radius:0 6px 6px 0; padding:1.1rem 1.3rem; margin:1.3rem 0;
  }
  .thread-quote .tag{
    font-family:'IBM Plex Mono', monospace; font-size:.72rem; text-transform:uppercase;
    letter-spacing:.05em; color:var(--gold); display:block; margin-bottom:.5rem;
  }
  .thread-quote p{margin:0; font-style:italic; color:var(--ink); font-size:.98rem;}

  .sources{
    margin-top:3rem; padding-top:1.75rem; border-top:1px solid var(--line);
  }
  .sources h3{font-size:1.05rem; margin-bottom:1rem;}
  .source-row{
    display:flex; align-items:center; gap:.9rem; padding:.75rem 0;
    border-bottom:1px dashed var(--line); font-size:.88rem;
  }
  .source-row .idx{font-family:'IBM Plex Mono', monospace; color:var(--ink-soft); width:1.4rem;}
  .source-row .meta{flex:1; color:var(--ink-soft);}
  .source-row .meta b{color:var(--ink); font-weight:600;}
  .placeholder-pill{
    font-family:'IBM Plex Mono', monospace; font-size:.7rem; color:var(--placeholder);
    background:var(--placeholder-bg); border:1px dashed var(--placeholder);
    padding:.2rem .55rem; border-radius:4px; white-space:nowrap;
  }
  .source-link{
    font-family:'IBM Plex Mono', monospace; font-size:.7rem; color:var(--accent);
    background:var(--accent-soft); border:1px solid var(--accent);
    padding:.2rem .55rem; border-radius:4px; white-space:nowrap; text-decoration:none;
  }
  .source-link:hover{ text-decoration:underline; }
  .note-pill{
    font-family:'IBM Plex Mono', monospace; font-size:.7rem; color:var(--gold);
    background:var(--gold-soft); border:1px solid var(--gold);
    padding:.2rem .55rem; border-radius:4px; white-space:nowrap;
  }

  .back-link{
    background:none; border:none; cursor:pointer; color:var(--ink-soft);
    font-family:'IBM Plex Mono', monospace; font-size:.82rem; padding:0 0 1.5rem; display:inline-flex; align-items:center; gap:.4rem;
    text-decoration:none;
  }
  .back-link:hover{color:var(--accent);}

  /* ---------- method page ---------- */
  .steps-list{display:flex; flex-direction:column; gap:1.75rem; margin:2rem 0 3rem;}
  .steps-list .step-row{display:grid; grid-template-columns:2.75rem 1fr; gap:1rem;}
  .steps-list .step-num{
    font-family:'Lora', serif; font-size:1.5rem; color:var(--accent); font-style:italic;
  }
  .steps-list h4{font-size:1.1rem; margin-bottom:.4rem;}
  .steps-list p{color:var(--ink-soft); margin:0;}

  .promise-box{
    background:var(--surface); border:1px solid var(--line); border-radius:6px; padding:1.75rem;
    margin:2rem 0;
  }
  .promise-box ul{margin:0; padding-left:1.2rem; color:var(--ink-soft);}
  .promise-box li{margin-bottom:.5rem;}
  .promise-box li::marker{color:var(--accent);}

  /* ---------- legal page ---------- */
  .legal-block{margin-bottom:2.5rem;}
  .legal-block h2{font-size:1.2rem; margin-bottom:.75rem;}
  .legal-block p, .legal-block li{color:var(--ink-soft); font-size:.95rem;}
  .field{
    background:var(--placeholder-bg); border:1px dashed var(--placeholder); color:var(--placeholder);
    padding:.05rem .4rem; border-radius:3px; font-family:'IBM Plex Mono',monospace; font-size:.85em;
  }
  dl.legal-facts{display:grid; grid-template-columns:auto 1fr; gap:.5rem 1rem; font-size:.9rem;}
  dl.legal-facts dt{color:var(--ink-soft); font-family:'IBM Plex Mono', monospace; font-size:.78rem; text-transform:uppercase; letter-spacing:.03em;}
  dl.legal-facts dd{margin:0; color:var(--ink);}

  footer{
    border-top:1px solid var(--line); margin-top:2rem; padding:2rem 1.5rem;
    max-width:1080px; margin-left:auto; margin-right:auto;
    display:flex; justify-content:space-between; flex-wrap:wrap; gap:1rem;
    font-size:.82rem; color:var(--ink-soft);
  }
  footer a{color:var(--ink-soft); text-decoration:underline;}

  @media (max-width:640px){
    .nav{flex-direction:column; align-items:flex-start; gap:.75rem;}
    footer{flex-direction:column;}
  }