/* Paintlang Studio - IDE default dark theme (VS Code Dark+ design language) */
:root{
    --bg:#1e1e1e; --panel:#252526; --panel2:#313131; --line:#333333; --line2:#454545;
    --text:#cccccc; --muted:#8a8a8a; --faint:#5a5a5a;
    --accent:#007acc; --accent-hi:#1177bb; --accent-soft:rgba(0,122,204,.18);
    --focus:#007fd4; --sel-bg:#094771;
    --tk-c:#6a9955; --tk-s:#ce9178; --tk-n:#b5cea8; --tk-k:#569cd6; --tk-a:#dcdcaa;
    --mono:"Cascadia Code",ui-monospace,Consolas,"SF Mono",Menlo,monospace;
    --sans:"Segoe UI",ui-sans-serif,system-ui,sans-serif;
  }
  *{box-sizing:border-box}
  html,body{height:100%}
  body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);overflow:hidden}
  #app{display:flex;flex-direction:column;height:100vh;height:100dvh}

  header{display:flex;align-items:center;gap:12px;padding:0 14px;height:44px;
    background:#323233;border-bottom:1px solid var(--line);flex:none}
  .logo{font-size:13px;font-weight:600;letter-spacing:.02em}
  .logo b{font-weight:600;color:var(--text)}
  .logo .sub{font-weight:400;font-size:11px;color:var(--muted);
    margin-left:10px;letter-spacing:.08em;text-transform:uppercase}
  .hgap{flex:1}
  select,button{font-family:var(--sans);font-size:12.5px;color:var(--text);
    background:var(--panel2);border:1px solid var(--line2);border-radius:3px;
    padding:5px 11px;cursor:pointer}
  select:hover,button:hover{background:#3c3c3c}
  button:focus-visible,select:focus-visible,textarea:focus-visible{outline:1px solid var(--focus);outline-offset:1px}
  #exportBtn{background:#0e639c;border-color:#0e639c;color:#fff;font-weight:600}
  #exportBtn:hover{background:var(--accent-hi)}

  main{flex:1;display:flex;min-height:0}
  #left{width:44%;min-width:260px;flex:none;display:flex;flex-direction:column;
    background:var(--bg);min-height:0}
  #divider{width:5px;cursor:col-resize;background:var(--panel);border-left:1px solid var(--line);
    border-right:1px solid var(--line);flex:none}
  #divider:hover{background:var(--focus)}
  #right{flex:1;display:flex;flex-direction:column;min-width:300px;min-height:0}

  /* ---- editor ---- */
  #editor{flex:1;display:flex;min-height:0;position:relative}
  #gutter{width:46px;flex:none;overflow:hidden;background:var(--bg);
    border-right:1px solid var(--line);padding:12px 0}
  #gutterInner{margin:0;font:13px/1.55 var(--mono);color:var(--faint);text-align:right;
    padding-right:10px;white-space:pre}
  #edstack{position:relative;flex:1;min-width:0}
  #hl,#code{position:absolute;inset:0;margin:0;padding:12px 14px;border:0;
    font:13px/1.55 var(--mono);white-space:pre;overflow:hidden;tab-size:2}
  #hl{color:var(--text);pointer-events:none;background:var(--bg)}
  #code{color:transparent;caret-color:#aeafad;background:transparent;resize:none;
    overflow:auto;outline:none;overscroll-behavior:none}
  #code::selection{background:rgba(38,79,120,.65);color:transparent}
  .tk-c{color:var(--tk-c);font-style:italic}
  .tk-s{color:var(--tk-s)}
  .tk-n{color:var(--tk-n)}
  .tk-k{color:var(--tk-k)}
  .tk-a{color:var(--tk-a)}

  /* ---- canvas side ---- */
  #toolbar{display:flex;align-items:center;gap:7px;padding:7px 12px;flex-wrap:wrap;
    background:var(--panel);border-bottom:1px solid var(--line);flex:none}
  .tlabel{font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-right:2px}
  .tool{min-width:58px;text-align:center}
  .tool.active{background:var(--sel-bg);border-color:var(--focus);color:#fff}
  .tsep{width:1px;height:22px;background:var(--line2);margin:0 3px}
  #toolbar input[type=color]{width:34px;height:27px;padding:2px;background:var(--panel2);
    border:1px solid var(--line2);border-radius:3px;cursor:pointer}
  #toolbar input[type=range]{accent-color:var(--accent);width:90px;cursor:pointer}
  .rangewrap{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:11px}
  .rangewrap output{font:11px var(--mono);color:var(--text);min-width:20px;text-align:right}

  #stage{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;
    padding:22px;background:#181818}
  #canvasWrap{position:relative;aspect-ratio:960/600;width:100%;max-width:100%;
    max-height:100%;margin:auto;
    border:1px solid var(--line2);border-radius:3px;
    box-shadow:0 8px 28px rgba(0,0,0,.45);
    background:#f6f1e7}
  #canvasWrap.fith{width:auto;height:100%}
  #paint,#overlay{position:absolute;inset:0;width:100%;height:100%;display:block}
  #overlay{touch-action:none}
  #overlay.draw{cursor:crosshair}
  #overlay.pick{cursor:default}

  footer{display:flex;align-items:center;gap:16px;padding:0 14px;height:24px;flex:none;
    background:var(--accent);border-top:1px solid var(--accent);
    font:11.5px var(--mono);color:#fff}
  footer .err{color:#ffd0c2;font-weight:600}
  footer .ok{color:#fff}
  #statusPos{margin-left:auto;color:rgba(255,255,255,.75)}

  /* ---- help modal ---- */
  #helpModal{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;
    align-items:center;justify-content:center;z-index:50}
  #helpModal[hidden]{display:none}
  #helpCard{background:var(--panel);border:1px solid var(--line2);border-radius:5px;
    width:min(880px,92vw);max-height:86vh;overflow-y:auto;padding:24px 28px;
    box-shadow:0 18px 48px rgba(0,0,0,.55)}
  #helpCard h2{font-weight:600;margin:0 0 4px;font-size:19px}
  #helpCard p{color:var(--muted);font-size:13px;line-height:1.6;max-width:64ch}
  #helpCard h3{font-size:11px;letter-spacing:.12em;text-transform:uppercase;
    color:#75beff;margin:22px 0 8px}
  .api{width:100%;border-collapse:collapse;font-size:12.5px}
  .api td{padding:5px 12px 5px 0;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.5}
  .api td:first-child{font-family:var(--mono);color:var(--tk-a);white-space:nowrap}
  .api td:last-child{color:var(--muted)}
  #helpClose{float:right;margin-top:-4px}
  kbd{font:11px var(--mono);background:#3c3c3c;border:1px solid var(--line2);
    border-radius:3px;padding:1px 6px;color:var(--text)}

  #layersbar{display:flex;align-items:center;gap:10px;padding:5px 12px;flex-wrap:wrap;
    background:var(--panel);border-bottom:1px solid var(--line);flex:none}
  #layerchips{display:flex;gap:6px;flex-wrap:wrap}
  .lchip{display:inline-flex;align-items:center;gap:5px;background:var(--panel2);
    border:1px solid var(--line2);border-radius:3px;padding:2px 7px;font-size:12px}
  .lchip.off{opacity:.45}
  .lchip b{font-weight:600;max-width:130px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .lchip button{padding:1px 6px;font-size:11px;border-radius:3px}
  .lchip input{width:52px;font:11px var(--mono);background:var(--bg);color:var(--text);
    border:1px solid var(--line2);border-radius:3px;padding:2px 4px}
  #linebar{position:absolute;left:0;right:0;background:rgba(255,255,255,.07);
    border-top:1px solid rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.05);
    display:none;pointer-events:none}
  #scrub{position:absolute;z-index:6;display:flex;align-items:center;gap:7px;
    background:var(--panel);border:1px solid var(--focus);border-radius:3px;
    padding:4px 9px;box-shadow:0 6px 16px rgba(0,0,0,.5)}
  #scrub[hidden]{display:none}
  #scrub input{width:130px;accent-color:var(--accent);cursor:ew-resize}
  #scrub output{font:11px var(--mono);color:var(--text);min-width:36px;text-align:right}
  #right{position:relative}
  #brushPanel{position:absolute;top:46px;left:12px;z-index:20;background:var(--panel);
    border:1px solid var(--line2);border-radius:5px;padding:10px 12px;width:296px;
    box-shadow:0 14px 34px rgba(0,0,0,.55);display:flex;flex-direction:column;gap:6px}
  #brushPanel[hidden]{display:none}
  .bp-head{display:flex;align-items:center;gap:8px}
  .bp-head b{flex:1;text-transform:capitalize;font-size:13px;font-weight:600}
  #bpPrev{border:1px solid var(--line);border-radius:3px;background:#f6f1e7;width:100%}
  .bp-row{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--muted)}
  .bp-row span{width:118px;flex:none}
  .bp-row input[type=range]{flex:1;accent-color:var(--accent);min-width:0}
  .bp-row output{width:34px;text-align:right;font:10.5px var(--mono);color:var(--text)}
  .bp-row select{padding:2px 6px;font-size:11px;flex:1}

  /* ---- mobile: stack the workspace, canvas first ---- */
  @media (max-width: 820px){
    main{flex-direction:column}
    #right{order:0;min-width:0;flex:none}
    #left{order:1;width:100% !important;min-width:0;flex:1;min-height:140px}
    #divider{display:none}
    header{height:auto;min-height:38px;padding:5px 10px;flex-wrap:wrap;gap:6px}
    .logo{font-size:12px}
    .logo .sub{display:none}
    select,button{padding:4px 8px;font-size:11.5px}
    #toolbar{padding:4px 8px;gap:4px}
    .tool{min-width:0}
    #toolbar input[type=range]{width:60px}
    #toolbar input[type=color]{width:30px;height:24px}
    .rangewrap{font-size:10px}
    #stage{flex:none;padding:8px}
    #canvasWrap{width:100%}
    #gutter{width:34px}
    #hl,#code{padding:10px 10px}
    footer{height:auto;min-height:20px;padding:2px 10px;font-size:10px;gap:8px}
    #statusMsg{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    #statusPos{display:none}
    #layersbar{padding:4px 8px;gap:6px}
    #brushPanel{left:8px;right:8px;width:auto;max-height:65dvh;overflow-y:auto}
    #helpCard{padding:16px 14px;max-height:90dvh}
    #scrub input{width:96px}
  }