:root{
    --paper:#f3f1ea; --panel:#faf9f4; --rail:#efece2;
    --ink:#241f2b; --ink-soft:#5f5866; --ink-faint:#8a8391;
    --line:#d8d3c6; --line-soft:#e6e2d6;
    --accent:#c0396b; --accent-soft:#e7c3d2; --accent-ink:#fff;
    --ghost:rgba(192,57,107,.16); --ghost-line:#c0396b;
    --shadow:0 1px 2px rgba(40,32,45,.06),0 8px 24px rgba(40,32,45,.08);
    --grid-heavy:#b7b0a1; --grid-light:#e0dccf;
    --sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
    --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
    --mono:ui-monospace,"SF Mono","Cascadia Code",Menlo,Consolas,monospace;
  }
  @media (prefers-color-scheme:dark){
    :root{
      --paper:#1b1820; --panel:#241f2b; --rail:#211d28;
      --ink:#efe9f2; --ink-soft:#b6adbf; --ink-faint:#7d7488;
      --line:#3a3446; --line-soft:#302a3a;
      --accent:#e86a95; --accent-soft:#5a2b3f; --accent-ink:#1b1820;
      --ghost:rgba(232,106,149,.20); --ghost-line:#e86a95;
      --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.45);
      --grid-heavy:#5b5468; --grid-light:#332e40;
    }
  }
  :root[data-theme="light"]{
    --paper:#f3f1ea; --panel:#faf9f4; --rail:#efece2; --ink:#241f2b; --ink-soft:#5f5866;
    --ink-faint:#8a8391; --line:#d8d3c6; --line-soft:#e6e2d6; --accent:#c0396b;
    --accent-soft:#e7c3d2; --accent-ink:#fff; --ghost:rgba(192,57,107,.16); --ghost-line:#c0396b;
    --shadow:0 1px 2px rgba(40,32,45,.06),0 8px 24px rgba(40,32,45,.08);
    --grid-heavy:#b7b0a1; --grid-light:#e0dccf;
  }
  :root[data-theme="dark"]{
    --paper:#1b1820; --panel:#241f2b; --rail:#211d28; --ink:#efe9f2; --ink-soft:#b6adbf;
    --ink-faint:#7d7488; --line:#3a3446; --line-soft:#302a3a; --accent:#e86a95;
    --accent-soft:#5a2b3f; --accent-ink:#1b1820; --ghost:rgba(232,106,149,.20); --ghost-line:#e86a95;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.45); --grid-heavy:#5b5468; --grid-light:#332e40;
  }
  *{box-sizing:border-box}
  html,body{height:100%}
  body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);
    font-size:14px;line-height:1.45;-webkit-font-smoothing:antialiased;overflow:hidden}
  .app{display:grid;grid-template-rows:auto 1fr;height:100vh}

  /* top bar */
  .topbar{display:flex;align-items:center;gap:16px;padding:10px 16px;
    background:var(--panel);border-bottom:1px solid var(--line)}
  .wordmark{font-family:var(--serif);font-size:20px;letter-spacing:.2px;display:flex;
    align-items:baseline;gap:9px;margin-right:auto}
  .wordmark b{font-weight:600}
  .wordmark .sub{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;
    text-transform:uppercase;color:var(--ink-faint)}
  .filebtns{display:flex;gap:6px;flex-wrap:wrap}

  button{font-family:var(--sans);font-size:13px;color:var(--ink);cursor:pointer;
    background:var(--panel);border:1px solid var(--line);border-radius:7px;
    padding:6px 11px;transition:background .12s,border-color .12s,color .12s}
  button:hover{border-color:var(--ink-faint)}
  button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
  button:disabled{opacity:.38;cursor:default}
  button.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
  button.primary:hover{filter:brightness(1.05)}
  button.on{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
  button.ghosted{background:transparent}

  .body{display:grid;grid-template-columns:264px 1fr;min-height:0}
  .rail{background:var(--rail);border-right:1px solid var(--line);overflow-y:auto;
    padding:14px;display:flex;flex-direction:column;gap:18px}
  .sec{display:flex;flex-direction:column;gap:9px}
  .sec > h3{margin:0;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;
    text-transform:uppercase;color:var(--ink-faint);font-weight:600;
    display:flex;align-items:center;justify-content:space-between}
  .row{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
  .dim{display:flex;align-items:center;gap:8px;justify-content:space-between}
  .dim label{font-size:12.5px;color:var(--ink-soft)}
  .stepper{display:flex;align-items:center;gap:0}
  .stepper button{border-radius:0;padding:4px 9px;min-width:30px}
  .stepper button:first-child{border-radius:7px 0 0 7px}
  .stepper button:last-child{border-radius:0 7px 7px 0;border-left:none}
  .stepper .val{min-width:40px;text-align:center;font-family:var(--mono);font-size:13px;
    padding:4px 4px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    background:var(--panel);font-variant-numeric:tabular-nums}

  /* palette */
  .pal{display:flex;flex-direction:column;gap:5px}
  .sw{display:flex;align-items:center;gap:9px;padding:5px 6px;border-radius:8px;
    border:1px solid transparent;cursor:pointer;background:var(--panel)}
  .sw:hover{border-color:var(--line)}
  .sw.sel{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}
  .chip{width:24px;height:28px;border-radius:5px;border:1px solid rgba(0,0,0,.2);
    flex:0 0 auto;position:relative;overflow:hidden;cursor:pointer}
  .chip .pen{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
    font-size:12px;color:#fff;text-shadow:0 0 3px rgba(0,0,0,.65),0 0 3px rgba(0,0,0,.65);
    opacity:0;transition:opacity .12s;pointer-events:none}
  .chip:hover .pen{opacity:1}
  .chip input{position:absolute;inset:-6px;opacity:0;cursor:pointer;width:200%;height:200%}
  .sw .nm{flex:1;font-size:13px;color:var(--ink);background:transparent;border:none;
    font-family:var(--sans);padding:2px 3px;min-width:0;cursor:pointer;border-radius:5px;
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .sw .nm[contenteditable="true"]{cursor:text;outline:1.5px solid var(--accent);background:var(--panel)}
  .sw.sel .nm{font-weight:600}
  .sw .tick{width:16px;flex:0 0 auto;text-align:center;color:var(--accent);opacity:0;font-size:13px}
  .sw.sel .tick{opacity:1}
  .sw .del{opacity:0;border:none;background:transparent;color:var(--ink-faint);
    padding:2px 5px;font-size:15px;line-height:1;border-radius:5px}
  .sw:hover .del{opacity:1}
  .sw .del:hover{color:var(--accent);background:var(--accent-soft)}

  .tools{display:grid;grid-template-columns:repeat(2,1fr);gap:6px}
  .tools button{display:flex;flex-direction:column;align-items:center;gap:3px;padding:8px 4px;
    font-size:11px}
  .tools button svg{width:18px;height:18px}

  .hint{font-size:11.5px;color:var(--ink-faint);line-height:1.4}
  .panelctl{display:flex;flex-direction:column;gap:9px;background:var(--panel);
    border:1px solid var(--line);border-radius:10px;padding:11px}
  .panelctl.empty{color:var(--ink-faint);font-size:12px;text-align:left;border-style:dashed}
  .xf{display:grid;grid-template-columns:1fr 1fr;gap:5px}
  .xf button{font-size:12px;padding:6px 6px}
  .lockrow{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--ink-soft);cursor:pointer}
  .lockrow input{accent-color:var(--accent)}
  .dim label.off{opacity:.45}
  .legendttl{font-family:var(--serif);font-size:13px;font-style:italic;color:var(--ink-soft)}

  /* workspace */
  .stage{position:relative;min-height:0;overflow:hidden;background:var(--paper)}
  .stage canvas{display:block;position:absolute;top:0;left:0;touch-action:none}
  .float{position:absolute;z-index:5;display:none;gap:4px;background:var(--panel);
    border:1px solid var(--line);border-radius:10px;padding:5px;box-shadow:var(--shadow);
    flex-wrap:wrap;max-width:230px}
  .float button{padding:5px 8px;font-size:12px}
  .float .lbl{width:100%;display:flex;align-items:center;justify-content:space-between;gap:8px;
    font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;
    color:var(--ink-faint);padding:1px 3px}
  .float .lbl button{padding:2px 8px;font-size:10px;border-radius:6px}
  .zoombar{position:absolute;right:14px;bottom:14px;z-index:4;display:flex;gap:4px;
    background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:4px;
    box-shadow:var(--shadow)}
  .zoombar button{padding:5px 9px;font-family:var(--mono)}
  .toast{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);z-index:9;
    background:var(--ink);color:var(--paper);padding:8px 14px;border-radius:8px;font-size:12.5px;
    box-shadow:var(--shadow);opacity:0;transition:opacity .2s;pointer-events:none}
  .toast.show{opacity:1}

  /* modal (help + export) */
  .overlay{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;
    background:rgba(20,16,24,.55);padding:24px}
  .overlay[hidden]{display:none}
  .modal{position:relative;background:var(--panel);color:var(--ink);border:1px solid var(--line);
    border-radius:14px;max-width:640px;width:100%;max-height:85vh;overflow:auto;
    box-shadow:var(--shadow);padding:26px 28px}
  .modal-x{position:absolute;top:12px;right:12px;border:none;background:transparent;font-size:20px;
    line-height:1;color:var(--ink-faint);padding:4px 9px;border-radius:8px}
  .modal-x:hover{background:var(--rail);color:var(--ink)}
  .modal-body h2{font-family:var(--serif);font-size:22px;margin:0 0 6px;text-wrap:balance}
  .modal-body h3{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
    color:var(--accent);margin:20px 0 6px}
  .modal-body p,.modal-body li{font-size:13.5px;line-height:1.55;color:var(--ink-soft)}
  .modal-body .lead{color:var(--ink);font-size:14px}
  .modal-body ul{margin:4px 0 0;padding-left:18px;display:flex;flex-direction:column;gap:4px}
  .modal-body kbd{font-family:var(--mono);font-size:11px;background:var(--rail);border:1px solid var(--line);
    border-radius:5px;padding:1px 5px;color:var(--ink);white-space:nowrap}
  .modal-actions{display:flex;gap:8px;margin:16px 0;flex-wrap:wrap;align-items:center}
  .modal-actions a{text-decoration:none}
  .modal-body img{max-width:100%;height:auto;border:1px solid var(--line);border-radius:8px;
    image-rendering:pixelated;background:var(--paper)}
  .modal-body .field{display:flex;gap:8px;margin-top:8px}
  .modal-body .field input[type=text]{flex:1;font:inherit;padding:8px 10px;border:1px solid var(--line);
    border-radius:8px;background:var(--paper);color:var(--ink)}
  .modal-body .field input:focus{outline:2px solid var(--accent);outline-offset:1px}
  .modal-body .savelist{list-style:none;margin:8px 0 0;padding:0;display:flex;flex-direction:column;gap:2px}
  .modal-body .savelist li{display:flex;align-items:center;gap:10px;padding:6px 8px;border-radius:8px}
  .modal-body .savelist li:hover{background:var(--rail)}
  .modal-body .savelist.rows .nm{flex:0 1 auto;color:var(--ink);font-weight:600}
  .modal-body .savelist .muted{margin-left:auto}
  .modal-body .savelist.rows .muted{margin-left:0}
  .modal-body .rowbtns{display:flex;gap:6px;margin-left:auto}
  .modal-body .muted{color:var(--ink-faint);font-size:12px}
  .linklike{border:none;background:transparent;color:var(--accent);padding:2px;cursor:pointer;font:inherit}
  .linklike:hover{text-decoration:underline}
  button.danger:hover{color:#fff;background:#c0405a;border-color:#c0405a}
  .filebtn{display:inline-block;cursor:pointer;font-size:13px;border:1px solid var(--line);
    border-radius:7px;padding:6px 11px;background:var(--panel)}
  .filebtn:hover{border-color:var(--ink-faint)}
  .filebtn input{display:none}
  .jsonbox{width:100%;min-height:120px;margin-top:8px;font-family:var(--mono);font-size:11.5px;
    border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--ink);padding:8px;resize:vertical}
  .modal-body details.paste{margin-top:12px}
  .modal-body details.paste summary{cursor:pointer;color:var(--accent);font-size:13px}
  @media (prefers-reduced-motion:reduce){*{transition:none!important}}