:root{
    --bg:#14171B; --surface:#1B1F24; --surface-2:#242931; --raised:#2A303A;
    --ink:#ECEDEE; --ink-soft:#9098A3; --ink-dim:#5D636D; --display:#F5F1E9; --on-ink:#14171B;
    --accent:#BE9A5C; --accent-soft:rgba(190,154,92,.13); --accent-line:rgba(190,154,92,.4);
    --sage:#7FAE96; --sage-soft:rgba(127,174,150,.13);
    --danger:#C97A6E; --danger-soft:rgba(201,122,110,.13);
    --ins-fg:#B7E4CE; --del-fg:#EAB3AA;
    --line:#2C323A; --radius:10px;
    --bg-glow:rgba(190,154,92,.06);
  }
  :root[data-theme="light"]{
    --bg:#F7F5EF; --surface:#FFFFFF; --surface-2:#F2EEE4; --raised:#EAE4D5;
    --ink:#211D17; --ink-soft:#6F695D; --ink-dim:#9B9385; --display:#1B1712; --on-ink:#FBF9F3;
    --accent:#A9762F; --accent-soft:rgba(169,118,47,.11); --accent-line:rgba(169,118,47,.45);
    --sage:#4C7E64; --sage-soft:rgba(76,126,100,.12);
    --danger:#A8493D; --danger-soft:rgba(168,73,61,.1);
    --ins-fg:#1F5B3E; --del-fg:#7A2E23;
    --line:#E3DCC9; --bg-glow:rgba(169,118,47,.07);
  }
  @media (prefers-color-scheme: light){
    :root:not([data-theme]){
      --bg:#F7F5EF; --surface:#FFFFFF; --surface-2:#F2EEE4; --raised:#EAE4D5;
      --ink:#211D17; --ink-soft:#6F695D; --ink-dim:#9B9385; --display:#1B1712; --on-ink:#FBF9F3;
      --accent:#A9762F; --accent-soft:rgba(169,118,47,.11); --accent-line:rgba(169,118,47,.45);
      --sage:#4C7E64; --sage-soft:rgba(76,126,100,.12);
      --danger:#A8493D; --danger-soft:rgba(168,73,61,.1);
      --ins-fg:#1F5B3E; --del-fg:#7A2E23;
      --line:#E3DCC9; --bg-glow:rgba(169,118,47,.07);
    }
  }
  *{box-sizing:border-box;}
  body{margin:0;background:
      radial-gradient(1200px 600px at 12% -10%, var(--bg-glow), transparent 55%),
      var(--bg);
    color:var(--ink);font-family:'Roboto', sans-serif;-webkit-font-smoothing:antialiased;transition:background .2s,color .2s;
    -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  }
  .app{max-width:1080px;margin:0 auto;padding:36px 20px 90px;}
  header.top{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:30px;border-bottom:1px solid var(--line);padding-bottom:22px;flex-wrap:wrap;}
  header.top h1{font-family:'Roboto', sans-serif;font-weight:600;font-size:30px;margin:0;letter-spacing:-0.015em;color:var(--display);}
  header.top p{margin:6px 0 0;color:var(--ink-soft);font-size:13.5px;max-width:42ch;line-height:1.55;}
  .stamp{display:inline-flex;align-items:center;gap:7px;font-size:12px;color:var(--ink-soft);white-space:nowrap;padding-bottom:2px;}
  .stamp::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--sage);box-shadow:0 0 0 3px var(--sage-soft);flex:0 0 auto;}
  .layout{display:grid;grid-template-columns:188px 1fr;gap:28px;}
  @media (max-width:680px){
    .layout{grid-template-columns:1fr;}
    nav.tools{display:flex;overflow-x:auto;gap:14px;padding-bottom:8px;}
    nav.tools .grp{flex:0 0 auto;display:flex;flex-direction:row;gap:6px;}
    nav.tools .grplabel{display:none;}
    nav.tools button{border-left:none;border-bottom:2px solid transparent;padding:8px 10px;}
    nav.tools button.active{border-bottom-color:var(--accent);}
  }
  nav.tools{display:flex;flex-direction:column;gap:20px;}
  nav.tools .grplabel{font-size:10.5px;letter-spacing:.03em;color:var(--ink-dim);margin:0 0 6px 13px;}
  nav.tools .grp{display:flex;flex-direction:column;gap:1px;}
  nav.tools button{text-align:left;background:none;border:none;border-left:2px solid transparent;padding:8px 12px;font-family:inherit;font-size:13.5px;color:var(--ink-soft);cursor:pointer;display:flex;align-items:center;gap:9px;white-space:nowrap;transition:color .12s,border-color .12s;}
  nav.tools button .dot{display:none;}
  nav.tools button.active{color:var(--ink);font-weight:500;border-left-color:var(--accent);background:linear-gradient(90deg,var(--accent-soft),transparent 70%);}
  nav.tools button:hover{color:var(--ink);}
  .panel{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:28px;min-height:360px;box-shadow:0 1px 0 rgba(255,255,255,.02) inset, 0 20px 40px -28px rgba(0,0,0,.6);}
  .panel h2{font-family:'Roboto',sans-serif;font-weight:600;font-size:20px;margin:0 0 6px;color:var(--display);}
  .panel .sub{color:var(--ink-soft);font-size:13.5px;margin:0 0 22px;max-width:62ch;line-height:1.6;}
  .dropzone{border:1px dashed var(--line);border-radius:var(--radius);padding:34px 20px;text-align:center;color:var(--ink-soft);font-size:14px;cursor:pointer;transition:border-color .15s,background .15s,color .15s;background:rgba(255,255,255,.012);}
  .dropzone:hover,.dropzone.drag{border-color:var(--accent-line);background:var(--accent-soft);color:var(--ink);}
  .dropzone input{display:none;}
  .filelist{list-style:none;margin:18px 0 0;padding:0;display:flex;flex-direction:column;gap:8px;}
  .filerow{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:var(--radius);padding:10px 12px;background:var(--surface-2);transition:border-color .12s,background .12s,opacity .12s;}
  .filerow.dragging{opacity:.4;}
  .filerow.drag-over{border-color:var(--accent-line);background:var(--accent-soft);}
  .draghandle{color:var(--ink-dim);font-size:14px;letter-spacing:-2px;cursor:grab;flex:0 0 auto;user-select:none;}
  .draghandle:active{cursor:grabbing;}
  .filerow .name{flex:1;font-size:13.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .filerow .size{font-family:'Roboto', sans-serif;font-size:11.5px;color:var(--ink-soft);}
  .thumbmini{object-fit:cover;border-radius:4px;background:#fff;border:1px solid var(--line);flex:0 0 auto;}
  .thumbmini-empty{display:inline-flex;align-items:center;justify-content:center;background:var(--raised);}
  .iconbtn{background:none;border:1px solid var(--line);border-radius:7px;width:28px;height:28px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--ink-soft);font-size:13px;line-height:1;transition:color .12s,border-color .12s;}
  .iconbtn:hover{color:var(--ink);border-color:var(--ink-dim);}
  .iconbtn.danger:hover{color:var(--danger);border-color:var(--danger);}
  button.primary{background:var(--accent);color:#181410;border:none;border-radius:var(--radius);padding:11px 20px;font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;margin-top:20px;letter-spacing:.005em;transition:filter .12s,transform .12s;}
  button.primary:disabled{background:var(--raised);cursor:not-allowed;color:var(--ink-dim);}
  button.primary:hover:not(:disabled){filter:brightness(1.08);}
  button.primary:active:not(:disabled){transform:translateY(1px);}
  button.ghost{background:none;border:1px solid var(--line);border-radius:8px;padding:7px 12px;font-family:inherit;font-size:12.5px;color:var(--ink-soft);cursor:pointer;}
  button.ghost:hover{color:var(--ink);border-color:var(--ink-dim);}
  .field{margin-top:18px;}
  .field label{display:block;font-size:12.5px;color:var(--ink-soft);margin-bottom:7px;letter-spacing:.01em;}
  .field input[type=text],.field input[type=number]{width:100%;border:1px solid var(--line);border-radius:8px;padding:9px 11px;font-family:'Roboto', sans-serif;font-size:13.5px;background:var(--surface-2);color:var(--ink);}
  .field input[type=text]:focus,.field input[type=number]:focus{outline:none;border-color:var(--accent-line);}
  .grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
  @media (max-width:480px){.grid2{grid-template-columns:1fr;}}
  .radiorow{display:flex;gap:18px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:2px;}
  .radiorow label{position:relative;padding:6px 1px 10px;font-size:13px;cursor:pointer;color:var(--ink-soft);}
  .radiorow input{display:none;}
  .radiorow label::after{content:'';position:absolute;left:0;right:0;bottom:-1px;height:2px;background:transparent;transition:background .12s;}
  .radiorow label:has(input:checked){color:var(--ink);}
  .radiorow label:has(input:checked)::after{background:var(--accent);}
  .thumbgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:14px;margin-top:18px;}
  .thumb{border:1px solid var(--line);border-radius:10px;padding:8px;background:var(--surface-2);position:relative;cursor:pointer;transition:border-color .12s;}
  .thumb.deleted{opacity:.35;}
  .thumb.selected{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);}
  .thumb img{width:100%;display:block;border-radius:5px;background:#fff;transition:transform .15s;}
  .thumb .idx{font-family:'Roboto', sans-serif;font-size:11px;color:var(--ink-soft);margin:8px 0 6px;}
  .thumb .ctrl{display:flex;gap:5px;flex-wrap:wrap;}
  .thumb .ctrl button{flex:1 1 auto;background:var(--raised);border:1px solid var(--line);border-radius:6px;font-size:11px;padding:5px 4px;cursor:pointer;color:var(--ink-soft);}
  .thumb .ctrl button:hover{color:var(--ink);border-color:var(--ink-dim);}
  .status{margin-top:18px;font-size:13px;color:var(--ink-soft);display:flex;align-items:center;gap:8px;}
  .status.err{color:var(--danger);}
  .spinner{width:13px;height:13px;border-radius:50%;border:2px solid var(--line);border-top-color:var(--accent);animation:spin .7s linear infinite;flex:0 0 auto;}
  @keyframes spin{to{transform:rotate(360deg);}}
  .resultcard{margin-top:20px;border:1px solid rgba(127,174,150,.35);background:var(--sage-soft);border-radius:var(--radius);padding:16px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;}
  .resultcard .meta{font-size:13px;color:var(--ink-soft);font-family:'Roboto', sans-serif;}
  .resultcard .links{display:flex;gap:8px;flex-wrap:wrap;}
  .resultcard a{background:var(--ink);color:var(--on-ink);text-decoration:none;padding:9px 16px;border-radius:8px;font-size:13.5px;font-weight:600;transition:filter .12s;}
  .resultcard a:hover{filter:brightness(1.15);}
  .rangehint{font-size:12px;color:var(--ink-dim);margin-top:7px;}
  .pagestack{display:flex;flex-direction:column;gap:24px;margin-top:20px;}
  .pagecard{border:1px solid var(--line);border-radius:12px;padding:14px;background:var(--surface-2);}
  .pagecard .head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;font-size:12.5px;color:var(--ink-soft);}
  .canvaswrap{position:relative;line-height:0;touch-action:none;}
  .canvaswrap canvas{width:100%;border-radius:6px;border:1px solid var(--line);display:block;}
  .selectbox{position:absolute;border:1.5px dashed var(--danger);background:rgba(201,122,110,.15);pointer-events:none;}
  .sigpad{border:1px solid var(--line);border-radius:10px;background:repeating-linear-gradient(45deg,#F7F4EC,#F7F4EC 8px,#EEE9DC 8px,#EEE9DC 16px);touch-action:none;width:100%;max-width:360px;}
  .diffbox{margin-top:18px;border:1px solid var(--line);border-radius:12px;padding:18px;font-size:13.5px;line-height:1.75;max-height:420px;overflow-y:auto;white-space:pre-wrap;background:var(--surface-2);}
  .diffbox ins{background:var(--sage-soft);text-decoration:none;color:var(--ins-fg);}
  .diffbox del{background:var(--danger-soft);color:var(--del-fg);}
  .progressbar{height:5px;border-radius:99px;background:var(--raised);overflow:hidden;margin-top:12px;}
  .progressbar > div{height:100%;background:var(--accent);transition:width .2s;}
  .themerow{display:flex;align-items:center;gap:10px;}
  .themeToggle{display:inline-flex;border:1px solid var(--line);border-radius:999px;padding:2px;gap:2px;background:var(--surface-2);}
  .themeToggle button{border:none;background:none;font-family:inherit;font-size:12px;padding:6px 12px;border-radius:999px;color:var(--ink-soft);cursor:pointer;transition:background .12s,color .12s;}
  .themeToggle button.active{background:var(--raised);color:var(--ink);}
  .themeToggle button:hover:not(.active){color:var(--ink);}
  .filepreview{display:flex;align-items:center;gap:14px;border:1px solid var(--line);border-radius:12px;padding:12px;background:var(--surface-2);margin-top:0;}
  .fp-thumb{width:56px;height:72px;object-fit:cover;border-radius:5px;background:#fff;box-shadow:0 4px 10px -6px rgba(0,0,0,.5);flex:0 0 auto;}
  .fp-thumb-empty{background:var(--raised);}
  .fp-meta .name{font-size:13.5px;color:var(--ink);word-break:break-all;}
  .fp-meta .size{font-family:'Roboto',sans-serif;font-size:11.5px;color:var(--ink-soft);margin-top:4px;}
  .rotatecard{position:relative;background:var(--surface-2);border:1px solid var(--line);border-radius:16px;padding:20px;width:210px;text-align:center;}
  .rotategrid{display:flex;flex-wrap:wrap;gap:16px;margin-top:20px;}
  .rotatecard .actions{position:absolute;top:14px;right:14px;display:flex;gap:8px;}
  .circlebtn{width:38px;height:38px;border-radius:50%;border:none;display:flex;align-items:center;justify-content:center;font-size:17px;cursor:pointer;background:var(--raised);color:var(--ink-soft);position:relative;line-height:1;}
  .circlebtn.accent{background:var(--accent);color:var(--on-ink);}
  .circlebtn:hover{filter:brightness(1.1);}
  .circlebtn[data-tip]:hover::after{content:attr(data-tip);position:absolute;bottom:120%;left:50%;transform:translateX(-50%);background:var(--raised);color:var(--ink);font-size:11px;font-weight:500;padding:6px 10px;border-radius:7px;white-space:nowrap;box-shadow:0 6px 16px rgba(0,0,0,.3);border:1px solid var(--line);}
  .thumbframe{background:#fff;border-radius:10px;padding:12px;margin-top:8px;height:160px;display:flex;align-items:center;justify-content:center;overflow:hidden;}
  .thumbframe img{max-width:100%;max-height:100%;display:block;transition:transform .2s;}
  .rotatecard .caption{margin-top:16px;font-size:12.5px;color:var(--ink-soft);letter-spacing:.03em;text-transform:uppercase;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .edittoolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:20px;padding:12px;border:1px solid var(--line);border-radius:12px;background:var(--surface-2);position:sticky;top:8px;z-index:6;}
  .edittoolbar .toolbtn{border:1px solid var(--line);background:var(--raised);color:var(--ink-soft);border-radius:8px;padding:8px 13px;font-size:13px;font-family:inherit;cursor:pointer;}
  .edittoolbar .toolbtn.active{background:var(--accent);color:var(--on-ink);border-color:var(--accent);}
  .edittoolbar label{font-size:12px;color:var(--ink-soft);display:flex;align-items:center;gap:6px;}
  .edittoolbar input[type=color]{width:34px;height:34px;border:1px solid var(--line);border-radius:8px;padding:2px;background:var(--surface-2);cursor:pointer;}
  .edittoolbar input[type=number]{width:56px;border:1px solid var(--line);border-radius:6px;padding:6px 7px;background:var(--surface-2);color:var(--ink);font-family:'Roboto',sans-serif;font-size:13px;}
  .edithint{margin-left:auto;font-size:12px;color:var(--ink-dim);}
  .editpage{position:relative;width:100%;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;container-type:size;margin-bottom:24px;}
  .editpage img.editbg{width:100%;height:100%;display:block;pointer-events:none;user-select:none;object-fit:fill;}
  canvas.editstrokes{position:absolute;inset:0;width:100%;height:100%;touch-action:none;}
  .edit-el{position:absolute;cursor:default;}
  .edit-el .elbar{position:absolute;top:-26px;left:0;display:flex;gap:4px;opacity:0;transition:opacity .1s;z-index:2;}
  .edit-el:hover .elbar,.edit-el:focus-within .elbar{opacity:1;}
  .elbar button{width:22px;height:22px;border-radius:5px;border:1px solid var(--line);background:var(--raised);color:var(--ink-soft);font-size:12px;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0;line-height:1;}
  .elbar button:first-child{cursor:grab;}
  .edit-text{min-width:30px;outline:1.5px dashed transparent;white-space:pre-wrap;line-height:1.2;padding:2px;border-radius:3px;}
  .edit-text:focus{outline-color:var(--accent-line);}
  .edit-img-wrap{min-width:20px;min-height:20px;}
  .edit-img-wrap img{width:100%;height:100%;display:block;pointer-events:none;}
  .resize-handle{position:absolute;right:-6px;bottom:-6px;width:12px;height:12px;background:var(--accent);border-radius:3px;cursor:nwse-resize;z-index:2;}
  .page-clear-strokes{position:absolute;bottom:8px;right:8px;z-index:3;font-size:11px;padding:5px 9px;}