:root{
    --paper:#EAE6DA;
    --panel:#DfD8C4;
    --panel-dark:#D2C9AF;
    --ink:#24261F;
    --ink-soft:#54523F;
    --rule:#B9B097;
    --rust:#C1421A;
    --rust-dark:#9C3213;
    --teal:#3E6259;
    --teal-dark:#2C473F;
    --cream:#F5F2E7;
    --radius-tag: 3px;
    --focus: #1D5FD1;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:'IBM Plex Sans', sans-serif;
    -webkit-font-smoothing:antialiased;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    background-image: radial-gradient(circle, rgba(36,38,31,0.06) 1.3px, transparent 1.3px);
    background-size: 26px 26px;
    z-index:0;
  }
  a{color:var(--rust-dark);}
  :focus-visible{outline:3px solid var(--focus); outline-offset:2px;}

  .wrap{max-width:1180px;margin:0 auto;padding:0 28px;position:relative;z-index:1;}

  /* ---------- Header ---------- */
  header.top{
    border-bottom:2px solid var(--ink);
    background:var(--cream);
    position:relative;
    z-index:2;
  }
  .top-inner{
    display:flex;align-items:center;justify-content:space-between;
    padding:18px 28px;
    max-width:1180px;margin:0 auto;
  }
  .brand{display:flex;align-items:center;gap:12px;}
  .brand-mark{
    width:38px;height:38px;flex:none;
    border:2.5px solid var(--ink);
    border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    background:var(--rust);
  }
  .brand-mark svg{width:19px;height:19px;}
  .brand-name{
    font-family:'Archivo', sans-serif;
    font-weight:900;
    font-size:1.28rem;
    letter-spacing:0.01em;
  }
  .brand-tag{font-size:0.72rem;color:var(--ink-soft);margin-top:-2px;}
  nav.top-links{display:flex;gap:22px;font-size:0.92rem;font-weight:600;}
  nav.top-links a{text-decoration:none;color:var(--ink);border-bottom:2px solid transparent;padding-bottom:2px;}
  nav.top-links a:hover{border-bottom-color:var(--rust);}

  /* ---------- Hero ---------- */
  .hero{
    padding:56px 0 40px;
    border-bottom:2px solid var(--ink);
    background:var(--paper);
    position:relative;
    z-index:1;
  }
  .hero-inner{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:end;}
  .hero h1{
    font-family:'Archivo', sans-serif;
    font-weight:900;
    font-size:clamp(2.4rem, 5vw, 3.6rem);
    line-height:1.02;
    margin:0 0 14px;
    letter-spacing:-0.01em;
  }
  .hero p.lede{
    font-size:1.08rem;
    color:var(--ink-soft);
    max-width:46ch;
    margin:0;
    line-height:1.55;
  }
  .hero-side{
    border-left:2px solid var(--ink);
    padding-left:24px;
  }
  .hero-side .count{
    font-family:'Archivo', sans-serif;
    font-weight:900;
    font-size:3.2rem;
    color:var(--rust);
    line-height:1;
  }
  .hero-side .count-label{font-size:0.85rem;color:var(--ink-soft);margin-top:6px;}

  .search-row{
    margin-top:32px;
    display:flex;
    gap:0;
    max-width:560px;
    border:2px solid var(--ink);
    background:var(--cream);
  }
  .search-row input{
    flex:1;
    border:none;background:transparent;
    padding:14px 16px;
    font-family:'IBM Plex Sans',sans-serif;
    font-size:1rem;
    color:var(--ink);
  }
  .search-row input:focus{outline:none;background:#fff;}
  .search-row .search-icon{
    display:flex;align-items:center;padding:0 14px;color:var(--ink-soft);border-left:2px solid var(--ink);
  }

  /* ---------- Layout ---------- */
  .board{
    display:grid;
    grid-template-columns:260px 1fr;
    gap:0;
    max-width:1180px;
    margin:0 auto;
    align-items:start;
  }
  aside.rail{
    border-right:2px solid var(--ink);
    padding:32px 24px 60px 0;
    position:sticky;
    top:0;
    align-self:start;
  }
  .rail-group{margin-bottom:28px;}
  .rail-group h3{
    font-family:'IBM Plex Mono', monospace;
    font-size:0.72rem;
    letter-spacing:0.06em;
    color:var(--ink-soft);
    margin:0 0 10px;
    font-weight:500;
  }
  .rail-btn{
    display:flex;align-items:center;gap:10px;
    width:100%;
    text-align:left;
    background:none;border:none;
    padding:9px 8px;
    font-family:'IBM Plex Sans',sans-serif;
    font-size:0.95rem;font-weight:500;
    color:var(--ink);
    cursor:pointer;
    border-radius:2px;
    border-left:3px solid transparent;
  }
  .rail-btn:hover{background:var(--panel);}
  .rail-btn.active{
    border-left:3px solid var(--rust);
    background:var(--panel-dark);
    font-weight:700;
  }
  .rail-btn .dot{width:6px;height:6px;border-radius:50%;background:var(--ink-soft);flex:none;}
  .rail-btn.active .dot{background:var(--rust);}

  main.stage{
    padding:32px 0 90px 40px;
    min-height:70vh;
  }

  /* Tool card grid (landing state) */
  .tool-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill, minmax(230px,1fr));
    gap:22px;
  }
  .tool-tag{
    position:relative;
    background:var(--cream);
    border:2px solid var(--ink);
    padding:22px 18px 18px;
    cursor:pointer;
    text-align:left;
    font-family:inherit;
    transition:transform 0.12s ease;
  }
  .tool-tag:hover{transform:translateY(-3px);}
  .tool-tag::before{
    content:"";
    position:absolute;top:-9px;left:20px;
    width:16px;height:16px;
    background:var(--paper);
    border:2px solid var(--ink);
    border-radius:50%;
  }
  .tool-tag .icon{
    width:34px;height:34px;
    display:flex;align-items:center;justify-content:center;
    background:var(--teal);
    border:2px solid var(--ink);
    margin-bottom:14px;
  }
  .tool-tag .icon svg{width:18px;height:18px;stroke:#fff;}
  .tool-tag h4{
    font-family:'Archivo',sans-serif;
    font-weight:700;
    font-size:1.05rem;
    margin:0 0 6px;
  }
  .tool-tag p{margin:0;font-size:0.85rem;color:var(--ink-soft);line-height:1.4;}
  .tool-tag .cat{
    position:absolute;top:18px;right:16px;
    font-family:'IBM Plex Mono',monospace;
    font-size:0.62rem;
    color:var(--ink-soft);
    letter-spacing:0.03em;
  }
  .section-label{
    font-family:'IBM Plex Mono', monospace;
    font-size:0.75rem;
    letter-spacing:0.05em;
    color:var(--rust-dark);
    margin:0 0 6px;
  }
  .section-title{
    font-family:'Archivo',sans-serif;
    font-weight:900;
    font-size:1.7rem;
    margin:0 0 26px;
  }

  /* ---------- Tool panel ---------- */
  .panel{display:none;}
  .panel.active{display:block;}
  .panel-head{
    display:flex;align-items:center;gap:14px;
    margin-bottom:6px;
  }
  .panel-head .icon{
    width:40px;height:40px;flex:none;
    display:flex;align-items:center;justify-content:center;
    background:var(--rust);
    border:2px solid var(--ink);
  }
  .panel-head .icon svg{width:20px;height:20px;stroke:#fff;}
  .panel-head h2{
    font-family:'Archivo',sans-serif;
    font-weight:900;
    font-size:1.75rem;
    margin:0;
  }
  .panel-sub{color:var(--ink-soft);margin:6px 0 28px;max-width:60ch;line-height:1.5;}
  .back-link{
    display:none;
    background:none;border:none;cursor:pointer;
    font-family:'IBM Plex Mono',monospace;
    font-size:0.78rem;
    color:var(--ink-soft);
    padding:0 0 18px;
    align-items:center;gap:6px;
  }
  .back-link.show{display:inline-flex;}

  .tool-body{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:36px;
    background:var(--cream);
    border:2px solid var(--ink);
    padding:30px;
  }
  @media(max-width:760px){ .tool-body{grid-template-columns:1fr;} }

  .field{margin-bottom:18px;}
  .field label{
    display:block;
    font-size:0.8rem;
    font-weight:600;
    margin-bottom:6px;
    color:var(--ink-soft);
  }
  .field input[type=text],
  .field input[type=number],
  .field input[type=date],
  .field select{
    width:100%;
    padding:11px 12px;
    border:1.5px solid var(--rule);
    background:#fff;
    font-family:'IBM Plex Sans',sans-serif;
    font-size:0.98rem;
    color:var(--ink);
  }
  .field input:focus, .field select:focus{border-color:var(--ink);outline:none;}
  .row2{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
  .field.check{display:flex;align-items:center;gap:9px;}
  .field.check input{width:16px;height:16px;}
  .field.check label{margin:0;font-size:0.9rem;color:var(--ink);}
  .field .range-out{font-family:'IBM Plex Mono',monospace;font-size:0.85rem;color:var(--rust-dark);float:right;}
  input[type=range]{width:100%;accent-color:var(--rust);}

  .btn{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--ink);color:var(--cream);
    border:2px solid var(--ink);
    padding:12px 22px;
    font-family:'IBM Plex Sans',sans-serif;
    font-weight:600;font-size:0.95rem;
    cursor:pointer;
  }
  .btn:hover{background:var(--rust);border-color:var(--rust);}
  .btn.secondary{background:transparent;color:var(--ink);}
  .btn.secondary:hover{background:var(--panel-dark);border-color:var(--ink);}

  .results{
    border-left:2px dashed var(--rule);
    padding-left:32px;
  }
  @media(max-width:760px){ .results{border-left:none;border-top:2px dashed var(--rule);padding-left:0;padding-top:24px;} }

  .stat-big{
    font-family:'Archivo',sans-serif;
    font-weight:900;
    font-size:2.6rem;
    color:var(--teal-dark);
    line-height:1;
    margin-bottom:4px;
  }
  .stat-label{font-size:0.85rem;color:var(--ink-soft);margin-bottom:24px;}
  .stat-line{
    display:flex;justify-content:space-between;
    padding:10px 0;
    border-bottom:1px solid var(--rule);
    font-size:0.92rem;
  }
  .stat-line span:first-child{color:var(--ink-soft);}
  .stat-line span:last-child{font-weight:700;font-family:'IBM Plex Mono',monospace;}
  .empty-hint{color:var(--ink-soft);font-size:0.9rem;font-style:normal;}

  #qr-canvas-wrap{
    background:#fff;
    border:2px solid var(--ink);
    padding:18px;
    display:inline-flex;
    align-items:center;justify-content:center;
    min-height:180px; min-width:180px;
  }
  .pill{
    display:inline-block;
    padding:4px 10px;
    font-family:'IBM Plex Mono',monospace;
    font-size:0.72rem;
    border:1.5px solid var(--ink);
    margin-top:10px;
  }
  .pill.good{background:var(--teal);color:#fff;border-color:var(--teal);}
  .pill.mid{background:#D9A13B;color:var(--ink);border-color:#D9A13B;}
  .pill.weak{background:var(--rust);color:#fff;border-color:var(--rust);}

  .copy-row{display:flex;gap:10px;align-items:center;margin-top:10px;}
  .copy-row input{flex:1;font-family:'IBM Plex Mono',monospace;font-size:0.88rem;padding:10px;border:1.5px solid var(--rule);background:#fff;}

  footer{
    border-top:2px solid var(--ink);
    padding:26px 0 40px;
    text-align:center;
    font-size:0.8rem;
    color:var(--ink-soft);
    position:relative;z-index:1;
  }

  /* mobile rail */
  .rail-toggle{display:none;}
  @media(max-width:900px){
    .board{grid-template-columns:1fr;}
    aside.rail{
      position:static;
      border-right:none;border-bottom:2px solid var(--ink);
      padding:20px 0;
      display:none;
    }
    aside.rail.open{display:block;}
    main.stage{padding:28px 0 70px;}
    .rail-toggle{
      display:flex;align-items:center;gap:8px;
      background:var(--panel-dark);
      border:2px solid var(--ink);
      padding:10px 16px;
      font-weight:700;font-size:0.9rem;
      cursor:pointer;
      margin:20px 0 0;
    }
    .hero-inner{grid-template-columns:1fr;gap:24px;}
    .hero-side{border-left:none;border-top:2px solid var(--ink);padding-left:0;padding-top:16px;}
    nav.top-links{display:none;}
  }
/* Anchor versions of button-styled elements, needed now that navigation
   between tools is real page links rather than JS panel toggling. */
a.tool-tag{display:block;text-decoration:none;color:inherit;}
a.rail-btn{text-decoration:none;display:flex;}