:root{
    --paper:#F6F7FA;
    --card:#FFFFFF;
    --ink:#14171F;
    --ink-dim:#6B7280;
    --line:#E3E6EC;
    --line-strong:#C9CEDA;
    --cobalt:#2454FF;
    --cobalt-dim:#EAF0FF;
    --punch:#FF3B57;
    --punch-dim:#FFE9EC;
    --radius:12px;
    --shadow: 0 1px 2px rgba(20,23,31,.04), 0 8px 24px -12px rgba(20,23,31,.12);
  }
  *{box-sizing:border-box}
  html,body{ height:100% }
  body{
    margin:0; background:var(--paper); color:var(--ink);
    font-family:'Inter',sans-serif; font-size:15px; line-height:1.55;
    -webkit-font-smoothing:antialiased;
    display:flex; flex-direction:column; min-height:100vh;
  }
  h1,h2,h3,.display{ font-family:'Sora',sans-serif; font-weight:700; letter-spacing:-0.02em; }
  .mono{ font-family:'JetBrains Mono',monospace; }
  a{ color:inherit }
  button{ font-family:inherit }
  img,svg{ display:block }
  .wrap{ max-width:1180px; margin:0 auto; padding:0 24px }
  @media (max-width:640px){ .wrap{ padding:0 16px } }
  :focus-visible{ outline:2px solid var(--cobalt); outline-offset:2px; border-radius:4px; }
  @media (prefers-reduced-motion: reduce){ *{ animation-duration:.001ms !important; transition-duration:.001ms !important } }

  /* ── header ── */
  header{ position:sticky; top:0; z-index:50; background:rgba(246,247,250,.9); backdrop-filter:blur(8px); border-bottom:1px solid var(--line); flex-shrink:0; }
  nav{ display:flex; align-items:center; justify-content:space-between; padding:16px 0 }
  .logo{ display:flex; align-items:center; gap:9px; font-size:19px; font-weight:800; }
  .logo .mark{ width:26px; height:26px; border-radius:7px; background:var(--cobalt); position:relative; flex-shrink:0; }
  .logo .mark::before, .logo .mark::after{ content:''; position:absolute; width:4px; height:4px; border-radius:50%; background:var(--paper); top:50%; transform:translateY(-50%); }
  .logo .mark::before{ left:-2px }
  .logo .mark::after{ right:-2px }
  .logo .mark span{ position:absolute; inset:0; display:flex; align-items:center; justify-content:center; color:#fff; font-size:13px; font-weight:800; }
  .privacy-pill{ display:inline-flex; align-items:center; gap:7px; font-family:'JetBrains Mono'; font-size:12px; color:var(--ink-dim); border:1px solid var(--line); background:var(--card); padding:6px 12px; border-radius:20px; }
  .privacy-pill .dot{ width:6px; height:6px; border-radius:50%; background:#16A34A; flex-shrink:0; }
  .btn{ display:inline-flex; align-items:center; gap:8px; padding:10px 18px; border-radius:8px; font-size:14px; font-weight:600; text-decoration:none; cursor:pointer; border:1px solid transparent; transition:transform .12s ease, box-shadow .12s ease, background .12s ease, border-color .12s ease; }
  .btn-cobalt{ background:var(--cobalt); color:#fff; }
  .btn-cobalt:hover{ background:#1c46e0; transform:translateY(-1px); box-shadow:0 8px 18px -8px rgba(36,84,255,.5); }
  .btn-ghost{ border-color:var(--line-strong); color:var(--ink); background:var(--card); }
  .btn-ghost:hover{ border-color:var(--ink-dim); }
  .btn:disabled{ opacity:.4; cursor:not-allowed; transform:none !important; box-shadow:none !important; }

  /* ── perforation signature element ── */
  .perf{
    height:20px; position:relative;
    background-image: radial-gradient(circle, var(--line-strong) 2.4px, transparent 2.6px);
    background-size: 18px 18px; background-position: 9px center; background-repeat: repeat-x;
  }
  .perf::before, .perf::after{ content:''; position:absolute; top:50%; left:0; right:0; height:1px; background:var(--line); transform:translateY(-50%); }
  .perf.punch{ background-image: radial-gradient(circle, var(--punch) 2.6px, transparent 2.8px); }
  .perf.punch::before, .perf.punch::after{ background:var(--punch); opacity:.35 }

  /* ── hero / upload ── */
  .hero{ padding:64px 0 20px; }
  .hero-inner{ max-width:640px; margin:0 auto; text-align:center; }
  .eyebrow{ display:inline-flex; align-items:center; gap:8px; font-family:'JetBrains Mono'; font-size:12px; color:var(--ink-dim); border:1px solid var(--line); padding:5px 12px; border-radius:20px; margin-bottom:22px; background:var(--card); }
  .hero h1{ font-size:38px; line-height:1.12; margin:0 0 16px; }
  @media (min-width:640px){ .hero h1{ font-size:48px } }
  .hero h1 .accent{ color:var(--cobalt); }
  .hero p.lead{ font-size:17px; color:var(--ink-dim); max-width:46ch; margin:0 auto 36px; }

  .advanced-editor-cta{
    position:relative; display:flex; align-items:center; gap:16px; text-align:left;
    max-width:560px; margin:44px auto 0; padding:18px 22px; border-radius:14px;
    border:1.5px solid var(--line-strong); background:var(--card); cursor:pointer;
    transition:border-color .15s, box-shadow .15s, transform .12s, background .15s;
  }
  .advanced-editor-cta:hover{ border-color:var(--cobalt); box-shadow:0 8px 22px -12px rgba(20,23,31,.25); transform:translateY(-1px); }
  .advanced-editor-cta.drag{ border-color:var(--cobalt); background:var(--cobalt-dim); }
  .advanced-editor-cta input[type=file]{ position:absolute; inset:0; opacity:0; cursor:pointer; }
  .ae-icon{
    width:44px; height:44px; border-radius:11px; background:var(--cobalt-dim); color:var(--cobalt);
    display:flex; align-items:center; justify-content:center; flex-shrink:0; position:relative;
  }
  .ae-icon::before, .ae-icon::after{
    content:''; position:absolute; inset:0; border-radius:50%; border:2px solid var(--cobalt);
    opacity:0; animation:sonarPulse 2.4s cubic-bezier(.25,.6,.4,1) infinite; pointer-events:none;
  }
  .ae-icon::after{ animation-delay:1.2s; }
  @keyframes sonarPulse{
    0%{ transform:scale(1); opacity:.55; }
    100%{ transform:scale(2.6); opacity:0; }
  }
  .ae-text{ flex:1; min-width:0; }
  .ae-title-row{ display:flex; align-items:center; gap:9px; margin-bottom:3px; flex-wrap:wrap; }
  .ae-title{ font-family:'Sora'; font-weight:700; font-size:16px; }
  .premium-badge{
    font-family:'JetBrains Mono'; font-size:10.5px; font-weight:700; letter-spacing:.03em;
    color:#8a5a00; background:linear-gradient(135deg, #FFE9B8, #FFD98A);
    padding:3px 9px; border-radius:20px; border:1px solid #F0C670;
  }
  .ae-sub{ font-size:13px; color:var(--ink-dim); margin:0; line-height:1.4; }
  .ae-arrow{ color:var(--ink-dim); flex-shrink:0; transition:transform .15s, color .15s; }
  .advanced-editor-cta:hover .ae-arrow{ transform:translateX(3px); color:var(--cobalt); }


  /* ── roadmap note ── */
  /* ── tool tiles section ── */
  .tools-section{ padding:50px 0 70px; }
  .tools-section-head{ text-align:center; margin-bottom:30px; }
  .tools-section-head h2{ font-size:22px; margin:0 0 6px; }
  .tools-section-head p{ color:var(--ink-dim); font-size:14px; margin:0; }
  .tiles-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(210px,1fr)); gap:18px; max-width:1180px; margin:0 auto; }
  .tile{
    position:relative; display:flex; flex-direction:column; align-items:flex-start; gap:14px;
    background:var(--card); border:1px solid var(--line); border-radius:14px; padding:26px 22px;
    cursor:pointer; text-align:left; font-family:inherit; color:var(--ink); text-decoration:none;
    transition:border-color .15s, transform .12s, box-shadow .15s;
  }
  .tile:hover{ border-color:var(--cobalt); transform:translateY(-2px); box-shadow:0 10px 22px -14px rgba(20,23,31,.25); }
  .tile-icon{ width:48px; height:48px; border-radius:11px; background:var(--cobalt-dim); color:var(--cobalt); display:flex; align-items:center; justify-content:center; }
  .tile-icon svg{ width:24px; height:24px; }
  .tile-title{ font-family:'Sora'; font-weight:600; font-size:17px; }
  .tile-sub{ font-size:13px; color:var(--ink-dim); }
  .tile.soon{ cursor:pointer; opacity:.62; }
  .tile.soon:hover{ border-color:var(--line-strong); transform:none; box-shadow:none; opacity:.85; }
  .tile.soon .tile-icon{ background:var(--paper); color:var(--ink-dim); }
  .tile-badge{ position:absolute; top:16px; right:16px; font-family:'JetBrains Mono'; font-size:10px; font-weight:600; letter-spacing:.03em; color:var(--ink-dim); background:var(--paper); border:1px solid var(--line); padding:2px 7px; border-radius:20px; }
  .roadmap b{ color:var(--ink); }

  /* ── workspace (shown once a file is loaded) ── */
  #workspace{ display:none; }
  #workspace.active{ display:flex; flex-direction:column; flex:1; min-height:0; }
  #landing.hidden{ display:none; }

  .toolbar{ background:var(--card); border-bottom:1px solid var(--line); flex-shrink:0; }
  .toolbar-inner{ display:flex; align-items:center; gap:8px; padding:12px 24px; overflow-x:auto; }
  .back-link{ display:flex; align-items:center; justify-content:center; width:32px; height:32px; border-radius:8px; border:1px solid var(--line); background:none; color:var(--ink-dim); cursor:pointer; flex-shrink:0; transition:background .12s, color .12s; }
  .back-link:hover{ background:var(--paper); color:var(--ink); }
  .toolbar-tools{ display:flex; align-items:center; gap:8px; }
  body.simple-mode .toolbar-tools{ display:none; }
  .toolbar-simple-title{ display:none; font-family:'Sora'; font-weight:600; font-size:15px; }
  body.simple-mode .toolbar-simple-title{ display:block; }
  .tool-btn{ display:flex; flex-direction:column; align-items:center; gap:5px; min-width:64px; padding:8px 10px; border-radius:9px; border:1px solid transparent; background:none; cursor:pointer; color:var(--ink-dim); transition:background .12s, color .12s; flex-shrink:0; }
  .tool-btn:hover{ background:var(--paper); color:var(--ink); }
  .tool-btn.active{ background:var(--cobalt-dim); color:var(--cobalt); }
  .tool-btn svg{ width:19px; height:19px; }
  .tool-btn span{ font-size:11px; font-weight:600; white-space:nowrap; }
  .toolbar-sep{ width:1px; align-self:stretch; background:var(--line); flex-shrink:0; margin:4px 2px; }
  .toolbar-file{ margin-left:auto; display:flex; align-items:center; gap:12px; flex-shrink:0; padding-left:12px; }
  .toolbar-file .fname{ font-size:13px; color:var(--ink-dim); max-width:180px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }

  .workspace-body{ display:grid; grid-template-columns:260px 1fr; gap:0; flex:1; min-height:0; }
  @media (max-width:860px){ .workspace-body{ grid-template-columns:1fr; } }

  .page-rail{ border-right:1px solid var(--line); background:var(--card); padding:18px 14px; overflow-y:auto; min-height:0; }
  .page-rail-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:14px; }
  .page-rail-head span{ font-size:12px; font-family:'JetBrains Mono'; color:var(--ink-dim); }
  .page-rail-head button{ font-size:11.5px; color:var(--cobalt); background:none; border:none; cursor:pointer; font-weight:600; padding:0; }

  .page-list{ display:flex; flex-direction:column; }
  .page-thumb-wrap{ position:relative; }
  .page-thumb{ position:relative; border:2px solid var(--line); border-radius:8px; overflow:hidden; cursor:grab; background:#fff; transition:border-color .12s, box-shadow .12s; }
  .page-thumb:active{ cursor:grabbing; }
  .page-thumb.selected{ border-color:var(--cobalt); box-shadow:0 0 0 3px var(--cobalt-dim); }
  .page-thumb.dragging{ opacity:.4; }
  .page-thumb canvas{ width:100%; display:block; }
  .page-thumb .pt-badge{ position:absolute; top:6px; left:6px; background:rgba(20,23,31,.75); color:#fff; font-family:'JetBrains Mono'; font-size:10.5px; padding:2px 6px; border-radius:5px; }
  .page-thumb .pt-check{ position:absolute; top:6px; right:6px; width:18px; height:18px; border-radius:5px; border:1.5px solid rgba(255,255,255,.85); background:rgba(20,23,31,.35); }
  .page-thumb.selected .pt-check{ background:var(--cobalt); border-color:var(--cobalt); }
  .page-thumb.selected .pt-check::after{ content:''; display:block; width:5px; height:9px; border:solid #fff; border-width:0 2px 2px 0; transform:rotate(45deg); margin:2px auto; }
  .page-split-toggle{ display:flex; align-items:center; justify-content:center; height:22px; margin:2px 0; cursor:pointer; }
  .page-split-toggle .perf{ flex:1; height:16px; }
  .page-split-toggle.marked .perf{ background-image: radial-gradient(circle, var(--punch) 2.8px, transparent 3px); }
  .page-split-toggle .scissors{ display:none; }
  .page-split-toggle.marked .scissors{ display:block; }
  .page-split-toggle:hover:not(.marked) .perf{ background-image: radial-gradient(circle, var(--cobalt) 2.4px, transparent 2.6px); }

  .canvas-area{ padding:28px; overflow-y:auto; min-height:0; }
  .empty-state{ text-align:center; color:var(--ink-dim); padding:80px 20px; font-size:14px; }

  .panel{ background:var(--card); border:1px solid var(--line); border-radius:12px; padding:22px; max-width:420px; margin:0 auto 20px; box-shadow:var(--shadow); }
  .panel h3{ font-size:15px; margin:0 0 4px; }
  .panel .panel-sub{ font-size:12.5px; color:var(--ink-dim); margin:0 0 18px; }
  .field{ margin-bottom:16px; }
  .field label{ display:block; font-size:12.5px; font-weight:600; margin-bottom:6px; }
  .field input[type=text], .field input[type=password], .field input[type=number], .field select{
    width:100%; font:inherit; font-size:14px; padding:9px 11px; border:1px solid var(--line-strong); border-radius:7px; background:#fff; color:var(--ink);
  }
  .field input[type=range]{ width:100%; }
  .field .range-row{ display:flex; align-items:center; gap:10px; }
  .field .range-row .val{ font-family:'JetBrains Mono'; font-size:12px; color:var(--ink-dim); width:38px; text-align:right; }
  .radio-row{ display:flex; gap:8px; flex-wrap:wrap; }
  .radio-row label{ display:flex; align-items:center; gap:6px; font-size:13px; border:1px solid var(--line-strong); border-radius:7px; padding:7px 11px; cursor:pointer; }
  .radio-row input{ margin:0; }
  .panel-actions{ display:flex; gap:10px; margin-top:6px; }
  .panel-note{ font-size:12px; color:var(--ink-dim); margin-top:10px; line-height:1.5; }

  /* OCR text search */
  .ocr-progress-bar{ width:100%; height:8px; border-radius:5px; background:var(--paper); overflow:hidden; margin-top:8px; }
  .ocr-progress-fill{ height:100%; width:0%; background:var(--cobalt); transition:width .25s ease; }
  .ocr-highlight-box{ position:absolute; border:2px solid #ff3b6b; background:rgba(255,59,107,.22); border-radius:2px; pointer-events:none; transition:left .1s,top .1s,width .1s,height .1s; }
  .ocr-results-list{ margin-top:14px; display:flex; flex-direction:column; gap:6px; max-height:320px; overflow-y:auto; }
  .ocr-result-item{ display:flex; flex-direction:column; align-items:flex-start; gap:2px; text-align:left; width:100%; padding:9px 11px; border:1px solid var(--line); border-radius:9px; background:#fff; cursor:pointer; font:inherit; }
  .ocr-result-item:hover{ border-color:var(--cobalt); }
  .ocr-result-item.active{ border-color:var(--cobalt); background:#eef2ff; }
  .ocr-result-page{ font-size:11px; font-weight:700; color:var(--cobalt); }
  .ocr-result-snippet{ font-size:12.5px; color:var(--ink); line-height:1.4; }
  .ocr-page-nav{ display:flex; align-items:center; justify-content:center; gap:14px; margin-top:12px; font-size:13px; }
  .ocr-page-nav button{ font:inherit; font-size:13px; padding:7px 12px; border:1px solid var(--line-strong); border-radius:8px; background:#fff; cursor:pointer; }
  .ocr-page-nav button:hover{ border-color:var(--cobalt); }
  .ocr-page-nav span{ color:var(--ink-dim); font-size:12.5px; }
  .pdfword-mode-list{ display:flex; flex-direction:column; gap:8px; margin-top:8px; }
  .pdfword-mode-item{ display:flex; align-items:flex-start; gap:9px; padding:10px 11px; border:1px solid var(--line); border-radius:9px; cursor:pointer; font-size:12.5px; line-height:1.45; color:var(--ink); }
  .pdfword-mode-item:hover{ border-color:var(--cobalt); }
  .pdfword-mode-item input{ margin-top:3px; }
  .pdfword-mode-item strong{ font-size:13px; }
  .ocr-lang-counter{ font-weight:400; color:var(--ink-dim); font-size:11.5px; float:right; }
  .ocr-lang-list{ display:flex; flex-direction:column; gap:2px; max-height:150px; overflow-y:auto; border:1px solid var(--line); border-radius:9px; padding:6px 4px; margin-top:6px; }
  .ocr-lang-item{ display:flex; align-items:center; gap:8px; padding:5px 8px; border-radius:6px; font-size:13px; color:var(--ink); cursor:pointer; }
  .ocr-lang-item:hover{ background:var(--paper); }
  .ocr-lang-item input{ margin:0; }

  .thumbs-grid-preview{ display:grid; grid-template-columns:repeat(auto-fill,minmax(120px,1fr)); gap:14px; max-width:900px; margin:0 auto; }
  .thumbs-grid-preview .gp{ border:1px solid var(--line); border-radius:8px; overflow:hidden; background:#fff; }
  .thumbs-grid-preview .gp canvas{ width:100%; display:block; }

  /* ══════════ dedicated single-purpose editors ══════════ */
  .dedicated-editor{ display:none; }
  .dedicated-editor.show{ display:flex; flex-direction:column; min-height:100vh; }
  .dedicated-editor.editor-drag{ outline:3px dashed var(--cobalt); outline-offset:-3px; }
  .ded-header{
    flex-shrink:0; z-index:40; background:var(--card); border-bottom:1px solid var(--line);
    display:flex; align-items:center; gap:14px; padding:14px 24px;
  }
  .ded-back{ display:flex; align-items:center; justify-content:center; width:32px; height:32px; border-radius:8px; border:1px solid var(--line); background:none; color:var(--ink-dim); cursor:pointer; flex-shrink:0; transition:background .12s, color .12s; }
  .ded-back:hover{ background:var(--paper); color:var(--ink); }
  .ded-title{ font-family:'Sora'; font-weight:700; font-size:16px; flex-shrink:0; }
  .ded-count{ color:var(--ink-dim); font-size:12.5px; flex:1; }
  .ded-download:disabled{ opacity:.4; cursor:not-allowed; }
  .ded-body{ max-width:980px; margin:0 auto; padding:32px 24px 60px; flex:1; min-height:0; overflow-y:auto; width:100%; }

  .split-mode-tabs{ display:flex; flex-shrink:0; border-bottom:1px solid var(--line); background:var(--card); }
  .split-mode-tab{
    flex:1; max-width:220px; display:flex; flex-direction:column; align-items:center; gap:3px;
    padding:14px 10px; border:none; border-bottom:2px solid transparent; background:none; cursor:pointer;
    font-family:inherit; color:var(--ink-dim); transition:border-color .12s, color .12s;
  }
  .split-mode-tab:hover{ color:var(--ink); }
  .split-mode-tab.active{ color:var(--cobalt); border-bottom-color:var(--cobalt); }
  .split-mode-tab .smt-label{ font-family:'Sora'; font-weight:700; font-size:14px; }
  .split-mode-tab .smt-sub{ font-size:11.5px; }

  .custom-range-row{ border:1px solid var(--line); border-radius:9px; padding:12px 14px; display:flex; flex-direction:column; gap:8px; cursor:grab; }
  .custom-range-row.dragging{ opacity:.4; }
  .custom-range-row + .custom-range-row{ margin-top:10px; }
  .custom-range-row-head{ display:flex; align-items:center; gap:8px; }
  .custom-range-drag{ color:var(--ink-dim); cursor:grab; font-size:13px; line-height:1; }
  .custom-range-label{ font-size:12px; font-weight:700; color:var(--ink-dim); background:var(--paper); padding:2px 8px; border-radius:20px; flex:1; }
  .custom-range-remove{ border:none; background:none; color:var(--ink-dim); cursor:pointer; font-size:15px; line-height:1; padding:2px 4px; }
  .custom-range-remove:hover{ color:var(--punch); }
  .custom-range-inputs{ display:flex; align-items:center; gap:8px; }
  .custom-range-inputs label{ flex:1; display:flex; align-items:center; gap:6px; font-size:11.5px; color:var(--ink-dim); border:1px solid var(--line-strong); border-radius:7px; padding:7px 10px; }
  .custom-range-inputs input{ flex:1; min-width:0; border:none; background:none; font:inherit; font-size:13px; text-align:right; color:var(--ink); }
  .custom-range-inputs input:focus{ outline:none; }
  .custom-range-size{ font-size:11px; color:var(--ink-dim); font-family:'JetBrains Mono'; }
  .btn-add-range{ width:100%; display:flex; align-items:center; justify-content:center; gap:7px; margin-top:12px; padding:11px; border:1.5px dashed var(--punch); border-radius:9px; background:none; color:var(--punch); font:inherit; font-size:13px; font-weight:700; cursor:pointer; transition:background .12s; }
  .btn-add-range:hover{ background:var(--punch-dim); }
  .range-merge-check{ display:flex; align-items:flex-start; gap:9px; font-size:13px; color:var(--ink); margin-top:16px; cursor:pointer; line-height:1.4; }
  .range-merge-check input{ margin-top:2px; }
  .quick-select-btn{ flex:1; padding:7px 11px; border:1px solid var(--line-strong); border-radius:7px; background:#fff; color:var(--ink); font:inherit; font-size:12.5px; font-weight:600; cursor:pointer; transition:background .12s, border-color .12s; }
  .quick-select-btn:hover{ border-color:var(--cobalt); color:var(--cobalt); }


  .split-size-stats{ display:flex; flex-direction:column; gap:4px; font-size:13px; color:var(--ink-dim); }
  .split-size-stats b{ color:var(--ink); font-weight:700; }
  .split-size-input-row{ display:flex; gap:8px; align-items:center; }
  .split-size-input-row input{ flex:1; font:inherit; font-size:14px; padding:9px 11px; border:1px solid var(--line-strong); border-radius:7px; background:#fff; color:var(--ink); }
  .split-size-unit-toggle{ display:flex; border:1px solid var(--line-strong); border-radius:7px; overflow:hidden; flex-shrink:0; }
  .split-size-unit-toggle button{ font:inherit; font-size:12.5px; font-weight:700; padding:9px 12px; border:none; background:#fff; color:var(--ink-dim); cursor:pointer; }
  .split-size-unit-toggle button.active{ background:var(--cobalt); color:#fff; }

  /* ── split-shell layout: main canvas + fixed sidebar with pinned CTA (used by Merge) ── */
  .ded-header-minimal{ justify-content:flex-start; }
  .split-shell{ display:flex; flex:1; min-height:0; }
  .split-canvas{ flex:1; padding:44px 36px; min-width:0; overflow-y:auto; }
  .split-sidebar{
    width:320px; flex-shrink:0; background:var(--card); border-left:1px solid var(--line);
    padding:30px 26px; overflow-y:auto;
    display:flex; flex-direction:column;
  }
  .split-shell.sidebar-left{ flex-direction:row; }
  .split-shell.sidebar-left .split-sidebar{ border-left:none; border-right:1px solid var(--line); order:-1; }
  .split-shell.sidebar-left .split-canvas{ background:var(--paper); }
  .sidebar-title{ font-family:'Sora'; font-weight:700; font-size:21px; margin:0 0 18px; }
  .sidebar-info{ display:flex; gap:10px; background:var(--cobalt-dim); color:var(--ink); border-radius:9px; padding:13px 14px; font-size:13px; line-height:1.55; }
  .sidebar-info + .sidebar-info{ margin-top:10px; }
  .sidebar-info svg{ flex-shrink:0; color:var(--cobalt); margin-top:1px; }
  .sidebar-info p{ margin:0; }
  .sidebar-count{ display:block; margin-top:14px; color:var(--ink-dim); font-size:12px; }
  .sidebar-spacer{ flex:1; }
  .sidebar-cta{ width:100%; justify-content:center; padding:15px; font-size:15px; gap:9px; flex-shrink:0; }

  /* merge: portrait document cards in a wrapping grid */
  .merge-filelist{ display:flex; flex-wrap:wrap; gap:22px; }
  .file-card{
    width:148px; display:flex; flex-direction:column; align-items:center; gap:10px;
    background:var(--card); border:1px solid var(--line); border-radius:10px; padding:16px 10px 14px;
    cursor:grab; position:relative; box-shadow:0 2px 12px -8px rgba(20,23,31,.2);
  }
  .file-card:active{ cursor:grabbing; }
  .file-card.dragging{ opacity:.4; }
  .file-card-thumb{ width:96px; height:128px; border-radius:5px; overflow:hidden; border:1px solid var(--line); background:var(--paper); box-shadow:0 3px 12px -5px rgba(20,23,31,.3); display:flex; align-items:center; justify-content:center; }
  .file-card-thumb canvas{ display:block; cursor:zoom-in; background:#fff; border:1px solid var(--line); box-shadow:0 2px 8px -3px rgba(20,23,31,.35); }
  .file-card-info{ width:100%; text-align:center; }
  .file-card-name{ font-size:12px; font-weight:600; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
  .file-card-count{ font-size:11px; color:var(--ink-dim); }
  .file-card-remove{ position:absolute; top:-14px; right:-10px; width:28px; height:28px; border-radius:50%; border:none; background:var(--ink); color:#fff; font-size:17px; line-height:1; cursor:pointer; opacity:0; transition:opacity .12s, background .12s, color .12s, transform .12s; display:flex; align-items:center; justify-content:center; box-shadow:0 4px 12px -4px rgba(20,23,31,.45); z-index:2; }
  .file-card:hover .file-card-remove{ opacity:1; }
  .file-card-remove:hover{ background:var(--punch); transform:scale(1.08); }
  .file-card-rotate{ position:absolute; top:-14px; left:50%; transform:translateX(-50%); width:28px; height:28px; border-radius:50%; border:none; background:var(--ink); color:#fff; cursor:pointer; opacity:0; transition:opacity .12s, background .12s, transform .12s; display:flex; align-items:center; justify-content:center; box-shadow:0 4px 12px -4px rgba(20,23,31,.45); z-index:2; }
  .file-card-rotate svg{ width:15px; height:15px; }
  .file-card:hover .file-card-rotate{ opacity:1; }
  .file-card-rotate:hover{ background:var(--cobalt); transform:translateX(-50%) scale(1.08); }
  .file-card-duplicate{ position:absolute; top:-14px; left:-10px; width:28px; height:28px; border-radius:50%; border:none; background:var(--ink); color:#fff; cursor:pointer; opacity:0; transition:opacity .12s, background .12s, transform .12s; display:flex; align-items:center; justify-content:center; box-shadow:0 4px 12px -4px rgba(20,23,31,.45); z-index:2; }
  .file-card-duplicate svg{ width:14px; height:14px; }
  .file-card:hover .file-card-duplicate{ opacity:1; }
  .file-card-duplicate:hover{ background:var(--cobalt); transform:scale(1.08); }
  .file-card-move{ position:absolute; top:50%; transform:translateY(-50%); width:28px; height:28px; border-radius:50%; border:none; background:var(--ink); color:#fff; cursor:pointer; opacity:0; transition:opacity .12s, background .12s, transform .12s; display:flex; align-items:center; justify-content:center; box-shadow:0 4px 12px -4px rgba(20,23,31,.45); z-index:2; }
  .file-card-move svg{ width:14px; height:14px; }
  .file-card:hover .file-card-move{ opacity:1; }
  .file-card-move:hover{ background:var(--cobalt); }
  .file-card-move.move-left{ left:-14px; }
  .file-card-move.move-right{ right:-14px; }
  .file-card-move:disabled{ opacity:0 !important; cursor:default; }
  .file-card-dupe-badge{ position:absolute; bottom:5px; left:5px; width:20px; height:20px; border-radius:50%; background:var(--punch-dim); color:var(--punch); display:flex; align-items:center; justify-content:center; cursor:help; box-shadow:0 2px 8px -3px rgba(20,23,31,.4); }
  .file-card-dupe-badge svg{ width:12px; height:12px; }
  .file-card-thumb{ position:relative; }
  .file-card-range{ display:flex; align-items:center; justify-content:center; gap:4px; font-size:11px; color:var(--ink-dim); margin-top:-2px; }
  .file-card-range select{ appearance:none; -webkit-appearance:none; width:40px; text-align:center; text-align-last:center; font-size:11.5px; font-weight:600; font-family:'JetBrains Mono'; border:1px solid var(--line); border-radius:6px; padding:4px 2px; color:var(--ink); background:var(--card); cursor:pointer; }
  .file-card-range select:focus{ outline:none; border-color:var(--cobalt); }
  .file-card-range select:hover{ border-color:var(--line-strong); }

  .merge-name-field{ display:flex; flex-direction:column; gap:6px; }
  .merge-name-field label{ font-size:12px; font-weight:600; color:var(--ink-dim); }
  .merge-name-field .input-row{ display:flex; align-items:center; border:1px solid var(--line); border-radius:9px; padding:0 12px; background:var(--card); }
  .merge-name-field input{ flex:1; min-width:0; border:none; background:none; padding:11px 0; font-size:13.5px; color:var(--ink); font-family:inherit; }
  .merge-name-field input:focus{ outline:none; }
  .merge-name-field .ext{ font-size:13px; color:var(--ink-dim); flex-shrink:0; }
  .merge-size-est{ font-size:11px; color:var(--ink-dim); margin-top:2px; }

  .thumb-lightbox{ position:fixed; inset:0; background:rgba(20,23,31,.6); display:none; align-items:center; justify-content:center; z-index:200; padding:40px; }
  .thumb-lightbox.show{ display:flex; }
  .thumb-lightbox-inner{ position:relative; max-width:min(600px,90vw); max-height:90vh; background:#fff; border-radius:10px; padding:14px; box-shadow:0 20px 60px -20px rgba(0,0,0,.5); }
  .thumb-lightbox-inner canvas{ display:block; max-width:100%; max-height:calc(90vh - 28px); border-radius:4px; }
  .thumb-lightbox-close{ position:absolute; top:-14px; right:-14px; width:30px; height:30px; border-radius:50%; border:none; background:var(--ink); color:#fff; font-size:16px; cursor:pointer; display:flex; align-items:center; justify-content:center; box-shadow:0 4px 14px -4px rgba(0,0,0,.4); }
  .thumb-lightbox-nav{ position:absolute; top:50%; transform:translateY(-50%); width:40px; height:40px; border-radius:50%; border:none; background:#fff; color:var(--ink); cursor:pointer; display:flex; align-items:center; justify-content:center; box-shadow:0 6px 18px -6px rgba(0,0,0,.35); transition:background .12s, color .12s; }
  .thumb-lightbox-nav:hover{ background:var(--cobalt); color:#fff; }
  .thumb-lightbox-nav:disabled{ opacity:.35; cursor:default; }
  .thumb-lightbox-nav:disabled:hover{ background:#fff; color:var(--ink); }
  .thumb-lightbox-prev{ left:-20px; }
  .thumb-lightbox-next{ right:-20px; }
  .thumb-lightbox-counter{ position:absolute; bottom:-14px; left:50%; transform:translateX(-50%); background:var(--ink); color:#fff; font-size:12px; font-family:'JetBrains Mono'; font-weight:600; padding:4px 12px; border-radius:20px; white-space:nowrap; box-shadow:0 4px 14px -4px rgba(0,0,0,.4); }

  .toast-action{ background:none; border:1px solid rgba(255,255,255,.35); color:inherit; font:inherit; font-weight:600; font-size:12.5px; padding:4px 10px; border-radius:6px; cursor:pointer; flex-shrink:0; }
  .toast-action:hover{ background:rgba(255,255,255,.15); }
  .file-card.add-card{
    justify-content:center; border:2px dashed var(--line-strong); background:none; box-shadow:none;
    cursor:pointer; color:var(--ink-dim); min-height:180px;
  }
  .file-card.add-card:hover{ border-color:var(--cobalt); color:var(--cobalt); }
  .add-card-icon{ width:36px; height:36px; border-radius:50%; background:var(--cobalt-dim); color:var(--cobalt); display:flex; align-items:center; justify-content:center; }
  .add-card-label{ font-size:12px; font-weight:600; }

  /* empty state shown inside a dedicated editor before any file is loaded */
  .ded-empty-wrap{ display:flex; align-items:center; justify-content:center; min-height:360px; width:100%; grid-column:1/-1; }
  #numbersFilledBody, #watermarkFilledBody{ display:none; }
  .ded-empty{
    text-align:center; padding:48px 34px; border:2px dashed var(--line-strong); border-radius:16px;
    cursor:pointer; transition:border-color .15s, background .15s; max-width:400px;
  }
  .ded-empty:hover{ border-color:var(--cobalt); background:var(--cobalt-dim); }
  .ded-empty.drag{ border-color:var(--cobalt); background:var(--cobalt-dim); }
  .ded-empty-icon{ width:46px; height:46px; margin:0 auto 16px; border-radius:12px; background:var(--cobalt-dim); color:var(--cobalt); display:flex; align-items:center; justify-content:center; position:relative; }
  .ded-empty-icon::before, .ded-empty-icon::after{
    content:''; position:absolute; inset:0; border-radius:50%; border:2px solid var(--cobalt);
    opacity:0; animation:sonarPulse 2.4s cubic-bezier(.25,.6,.4,1) infinite; pointer-events:none;
  }
  .ded-empty-icon::after{ animation-delay:1.2s; }
  .ded-empty-title{ font-family:'Sora'; font-weight:700; font-size:16px; margin:0 0 6px; }
  .ded-empty-sub{ font-size:13px; color:var(--ink-dim); margin:0; }

  /* split: horizontal-wrapping strip with perforations */
  .split-strip{ display:flex; flex-wrap:wrap; align-items:center; gap:0; }
  .split-strip.spaced-grid{ gap:14px; }
  .split-thumb{ position:relative; width:120px; border:2px solid var(--line); border-radius:8px; overflow:hidden; background:#fff; }
  .split-thumb canvas{ width:100%; display:block; }
  .split-thumb .st-badge{ position:absolute; top:5px; left:5px; background:rgba(20,23,31,.7); color:#fff; font-family:'JetBrains Mono'; font-size:10px; padding:1px 5px; border-radius:4px; }
  .split-thumb.selectable{ cursor:pointer; }
  .split-thumb.selectable.selected{ border-color:var(--cobalt); box-shadow:0 0 0 3px var(--cobalt-dim); }
  .split-thumb .st-check{ position:absolute; top:5px; right:5px; width:18px; height:18px; border-radius:5px; border:1.5px solid rgba(255,255,255,.85); background:rgba(20,23,31,.35); }
  .split-thumb.selected .st-check{ background:var(--cobalt); border-color:var(--cobalt); }
  .split-thumb.selected .st-check::after{ content:''; display:block; width:5px; height:9px; border:solid #fff; border-width:0 2px 2px 0; transform:rotate(45deg); margin:2px auto; }
  .split-toggle{ width:26px; align-self:stretch; display:flex; align-items:center; justify-content:center; cursor:pointer; }
  .split-toggle-line{ width:2px; height:70%; border-radius:2px; background:var(--line-strong); }
  .split-toggle:hover .split-toggle-line{ background:var(--cobalt); }
  .split-toggle.marked .split-toggle-line{ background:var(--punch); width:3px; }

  /* reorder: big vertical drag list */
  .reorder-list{ display:flex; flex-direction:column; gap:10px; max-width:420px; margin:0 auto; }
  .reorder-item{ display:flex; align-items:center; gap:14px; background:var(--card); border:2px solid var(--line); border-radius:10px; padding:10px 14px; cursor:grab; }
  .reorder-item:active{ cursor:grabbing; }
  .reorder-item.dragging{ opacity:.4; }
  .reorder-item .ri-thumb{ width:50px; border-radius:5px; overflow:hidden; border:1px solid var(--line); flex-shrink:0; background:#fff; }
  .reorder-item .ri-thumb canvas{ width:100%; display:block; }
  .reorder-item .ri-badge{ font-family:'JetBrains Mono'; font-size:12px; color:var(--ink-dim); }
  .reorder-item .ri-handle{ margin-left:auto; color:var(--line-strong); flex-shrink:0; }

  /* rotate / delete / extract: wrapped thumbnail grid */
  .thumbs-wrap-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(130px,1fr)); gap:16px; }
  .grid-thumb-inner{ position:relative; height:172px; border:2px solid var(--line); border-radius:9px; overflow:hidden; background:var(--paper); transition:border-color .12s; display:flex; align-items:center; justify-content:center; }
  .grid-thumb-inner canvas{ display:block; background:#fff; border:1px solid var(--line); box-shadow:0 2px 8px -3px rgba(20,23,31,.35); }
  .grid-thumb-badge{ position:absolute; top:6px; left:6px; background:rgba(20,23,31,.7); color:#fff; font-family:'JetBrains Mono'; font-size:10.5px; padding:2px 6px; border-radius:5px; }
  .grid-thumb-actions{ position:absolute; inset:0; display:flex; align-items:center; justify-content:center; gap:8px; background:rgba(20,23,31,0); opacity:0; transition:opacity .12s, background .12s; }
  .grid-thumb-inner:hover .grid-thumb-actions{ opacity:1; background:rgba(20,23,31,.45); }
  .grid-thumb-actions button{ width:34px; height:34px; border-radius:50%; border:none; background:#fff; color:var(--ink); font-size:16px; cursor:pointer; display:flex; align-items:center; justify-content:center; }
  .grid-thumb-actions button:hover{ background:var(--cobalt); color:#fff; }
  .gt-remove{ position:absolute; top:6px; right:6px; width:24px; height:24px; border-radius:50%; border:none; background:rgba(20,23,31,.65); color:#fff; font-size:15px; line-height:1; cursor:pointer; opacity:0; transition:opacity .12s, background .12s; }
  .grid-thumb-inner:hover .gt-remove{ opacity:1; }
  .gt-remove:hover{ background:var(--punch); }
  .gt-check{ position:absolute; top:6px; right:6px; width:20px; height:20px; border-radius:5px; border:1.5px solid rgba(255,255,255,.9); background:rgba(20,23,31,.35); }
  .grid-thumb-inner.selected{ border-color:var(--cobalt); box-shadow:0 0 0 3px var(--cobalt-dim); }
  .grid-thumb-inner.selected .gt-check{ background:var(--cobalt); border-color:var(--cobalt); }
  .grid-thumb-inner.selected .gt-check::after{ content:''; display:block; width:5px; height:9px; border:solid #fff; border-width:0 2px 2px 0; transform:rotate(45deg); margin:2px auto; }
  .thumbs-wrap-grid.extract-grid .grid-thumb-inner{ cursor:pointer; }

  /* numbers / watermark: settings + live preview */
  .split-preview{ display:flex; justify-content:center; align-items:flex-start; width:100%; }
  .wm-body .field{ margin-bottom:16px; }
  .wm-mode-tabs{ display:flex; border:1px solid var(--line-strong); border-radius:9px; overflow:hidden; margin-bottom:18px; }
  .wm-mode-tab{ flex:1; display:flex; flex-direction:column; align-items:center; gap:4px; padding:12px 6px; border:none; background:#fff; color:var(--ink-dim); font:inherit; font-size:12px; font-weight:600; cursor:pointer; }
  .wm-mode-tab + .wm-mode-tab{ border-left:1px solid var(--line-strong); }
  .wm-mode-tab.active{ background:var(--cobalt-dim); color:var(--cobalt); }
  .wm-mode-tab-icon{ font-family:'Sora'; font-weight:700; font-size:17px; }
  .wm-format-row{ display:flex; align-items:center; gap:8px; }
  .wm-format-row select{ flex:1; font:inherit; font-size:13px; padding:9px 10px; border:1px solid var(--line-strong); border-radius:7px; background:#fff; color:var(--ink); }
  .wm-format-btn{ width:34px; height:34px; flex-shrink:0; border:1px solid var(--line-strong); border-radius:7px; background:#fff; color:var(--ink); cursor:pointer; font-size:14px; }
  .wm-format-btn.active{ background:var(--cobalt); color:#fff; border-color:var(--cobalt); }
  .wm-format-row input[type=color]{ width:34px; height:34px; flex-shrink:0; padding:0; border:1px solid var(--line-strong); border-radius:7px; cursor:pointer; background:none; }
  .wm-image-preview{ display:flex; align-items:center; gap:10px; margin-top:10px; font-size:12px; color:var(--ink-dim); }
  .wm-image-preview img{ width:44px; height:44px; object-fit:contain; border:1px solid var(--line); border-radius:6px; background:#fff; }
  .wm-position-row{ display:flex; align-items:flex-start; gap:16px; }
  .wm-position-grid{ display:grid; grid-template-columns:repeat(3,26px); grid-template-rows:repeat(3,26px); gap:4px; padding:8px; border:1px solid var(--line-strong); border-radius:9px; background:var(--paper); }
  .wm-pos-cell{ width:26px; height:26px; border-radius:5px; border:1px solid var(--line-strong); background:#fff; cursor:pointer; padding:0; }
  .wm-pos-cell:hover{ border-color:var(--cobalt); }
  .wm-pos-cell.active{ background:var(--cobalt); border-color:var(--cobalt); }
  .wm-pos-cell:disabled{ cursor:default; }
  .wm-pos-cell:disabled:hover{ border-color:var(--line-strong); }
  .wm-mosaic-check{ display:flex; align-items:center; gap:7px; font-size:13px; color:var(--ink); cursor:pointer; padding-top:8px; }
  .wm-mosaic-col{ display:flex; flex-direction:column; gap:10px; }
  .wm-mosaic-density-field{ margin:0; }
  .wm-mosaic-density-field label{ font-size:11.5px; font-weight:600; color:var(--ink-dim); margin-bottom:5px; }
  .wm-mosaic-density-field select{ font:inherit; font-size:12.5px; padding:7px 8px; border:1px solid var(--line-strong); border-radius:7px; background:#fff; color:var(--ink); max-width:170px; }
  .wm-mosaic-grid-note{ margin:6px 0 0; font-size:11px; color:var(--ink-dim); }
  .wm-two-col{ display:grid; grid-template-columns:1fr 1fr; gap:14px; }
  .wm-two-col select{ width:100%; font:inherit; font-size:13px; padding:9px 10px; border:1px solid var(--line-strong); border-radius:7px; background:#fff; color:var(--ink); }
  .wm-pages-row{ display:flex; align-items:center; gap:8px; }
  .wm-pages-input{ flex:1; display:flex; align-items:center; gap:6px; font-size:11.5px; color:var(--ink-dim); border:1px solid var(--line-strong); border-radius:7px; padding:7px 10px; }
  .wm-pages-input input{ flex:1; min-width:0; border:none; background:none; font:inherit; font-size:13px; text-align:right; color:var(--ink); }
  .wm-pages-input input:focus{ outline:none; }
  .wm-layer-toggle{ display:flex; flex-direction:column; gap:8px; }
  .wm-layer-btn{ display:flex; align-items:center; gap:10px; padding:11px 14px; border:1px solid var(--line-strong); border-radius:9px; background:#fff; color:var(--ink-dim); font:inherit; font-size:13px; font-weight:600; cursor:pointer; text-align:left; }
  .wm-layer-btn.active{ border-color:var(--cobalt); background:var(--cobalt-dim); color:var(--cobalt); }
  .preview-page-wrap{ position:relative; max-width:360px; box-shadow:0 4px 18px -8px rgba(20,23,31,.25); border-radius:4px; overflow:hidden; }
  .preview-page-wrap canvas{ width:100%; display:block; }
  .preview-overlay-text{ position:absolute; font-family:'JetBrains Mono'; font-size:13px; color:#5a5748; pointer-events:none; }
  .preview-overlay-text.pos-bottom-center{ bottom:4%; left:50%; transform:translateX(-50%); }
  .preview-overlay-text.pos-bottom-right{ bottom:4%; right:5%; }
  .preview-overlay-text.pos-bottom-left{ bottom:4%; left:5%; }
  .preview-overlay-text.pos-top-right{ top:4%; right:5%; }
  .preview-watermark-text{
    top:50%; left:50%; transform:translate(-50%,-50%) rotate(-38deg); font-family:'Sora'; font-weight:700;
    font-size:26px; color:var(--punch); white-space:nowrap; text-align:center; width:140%;
  }

  .toast{ position:fixed; bottom:24px; left:50%; transform:translateX(-50%) translateY(20px); background:var(--ink); color:#fff; padding:12px 20px; border-radius:9px; font-size:13.5px; opacity:0; pointer-events:none; transition:opacity .2s, transform .2s; z-index:100; display:flex; align-items:center; gap:10px; }
  .toast.show{ opacity:1; transform:translateX(-50%) translateY(0); }
  .toast.error{ background:var(--punch); }

  footer{ border-top:1px solid var(--line); padding:26px 0; font-size:12.5px; color:var(--ink-dim); flex-shrink:0; }
  body.in-tool footer{ display:none; }
  footer .wrap{ display:flex; flex-wrap:wrap; gap:14px; justify-content:space-between; align-items:center; }