:root{
      color-scheme:light dark;
      --bg:#f4f7f6;--surface:#fff;--surface-2:#eef3f1;--surface-3:#e4ece8;
      --ink:#13201a;--muted:#5c6b64;--line:#d9e2de;--brand:#087f5b;--brand-2:#055b43;
      --brand-soft:#dff4eb;--danger:#c53b38;--danger-soft:#ffebe9;--warn:#a55b05;
      --shadow:0 18px 50px rgba(20,51,39,.10);--shadow-sm:0 7px 22px rgba(20,51,39,.08);
      --focus:0 0 0 3px rgba(8,127,91,.22);
    }
    @media(prefers-color-scheme:dark){:root{
      --bg:#101513;--surface:#171e1b;--surface-2:#202a26;--surface-3:#2a3530;
      --ink:#edf7f2;--muted:#a8b8b0;--line:#34423c;--brand:#4fd1a1;--brand-2:#84e3bf;
      --brand-soft:#173a2e;--danger:#ff7771;--danger-soft:#3b211f;--warn:#ffb45c;
      --shadow:0 18px 50px rgba(0,0,0,.35);--shadow-sm:0 7px 22px rgba(0,0,0,.25);
      --focus:0 0 0 3px rgba(79,209,161,.25);
    }}
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:"DM Sans",sans-serif;min-height:100vh}
    button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:none;box-shadow:var(--focus)}
    .app{min-height:100vh;display:flex;flex-direction:column}.shell{width:min(1180px,calc(100% - 32px));margin:0 auto}
    .topbar{height:68px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
    .trust{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:13px;font-weight:600}.trust svg{color:var(--brand)}
    .top-actions{display:flex;gap:8px}.icon-btn,.ghost-btn,.primary-btn,.secondary-btn,.danger-btn{border:0;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;transition:.16s ease}
    .icon-btn{width:40px;height:40px;background:transparent}.icon-btn:hover,.ghost-btn:hover{background:var(--surface-2)}
    .ghost-btn,.secondary-btn,.danger-btn,.primary-btn{min-height:42px;padding:0 15px}.ghost-btn{background:transparent}.secondary-btn{background:var(--surface-2);border:1px solid var(--line)}.secondary-btn:hover{background:var(--surface-3)}
    .primary-btn{background:var(--brand);color:#fff}.primary-btn:hover{background:var(--brand-2)}@media(prefers-color-scheme:dark){.primary-btn{color:#08130f}}
    .danger-btn{background:var(--danger-soft);color:var(--danger)}.sm{min-height:36px;padding:0 12px;font-size:13px}.hidden{display:none!important}
    .home{padding:54px 0 64px}.hero{display:grid;grid-template-columns:1fr .85fr;gap:48px;align-items:center;margin-bottom:56px}
    h1,h2,h3{font-family:"Manrope",sans-serif;margin:0;letter-spacing:-.035em}.hero h1{font-size:clamp(38px,5.4vw,66px);line-height:1.03;max-width:680px}.hero h1 span{color:var(--brand)}
    .hero p{font-size:18px;line-height:1.65;color:var(--muted);max-width:620px;margin:20px 0 0}
    .dropzone{background:var(--surface);border:1.5px dashed #87b9a6;border-radius:22px;padding:40px 28px;text-align:center;box-shadow:var(--shadow);position:relative;overflow:hidden;min-height:292px;display:flex;flex-direction:column;align-items:center;justify-content:center}
    .dropzone.dragging{border-color:var(--brand);background:var(--brand-soft)}.drop-icon{width:68px;height:68px;border-radius:18px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;margin-bottom:18px}.dropzone h2{font-size:22px}.dropzone p{font-size:14px;margin:8px 0 18px;color:var(--muted)}.drop-note{font-size:12px!important;margin:14px 0 0!important}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:18px}.section-head h2{font-size:26px}.section-head p{margin:6px 0 0;color:var(--muted)}
    .search{position:relative;max-width:270px;width:100%}.search svg{position:absolute;left:12px;top:11px;color:var(--muted)}.search input{width:100%;height:42px;border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:0 12px 0 40px}
    .tool-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.tool-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:19px;text-align:left;min-height:154px;transition:.18s;position:relative;overflow:hidden}.tool-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);border-color:#8dbca9}.tool-card:after{content:"";position:absolute;right:16px;top:22px;width:7px;height:7px;border-radius:50%;background:var(--brand);opacity:.55}
    .tool-card .tool-icon{width:42px;height:42px;border-radius:11px;background:var(--surface-2);display:grid;place-items:center;color:var(--brand);margin-bottom:17px}.tool-card h3{font-size:16px;letter-spacing:-.015em}.tool-card p{font-size:13px;line-height:1.5;color:var(--muted);margin:5px 0 0}.tool-card.no-match{display:none}
    .workspace{height:calc(100vh - 68px);min-height:640px;display:grid;grid-template-rows:auto 1fr}.workspace-bar{padding:12px 0;display:flex;align-items:center;gap:10px}.workspace-bar .filename{min-width:0;flex:1}.filename strong,.filename small{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.filename small{color:var(--muted);font-size:12px;margin-top:2px}
    .workgrid{min-height:0;display:grid;grid-template-columns:250px minmax(0,1fr) 280px;background:var(--surface);border:1px solid var(--line);border-radius:18px 18px 0 0;overflow:hidden;box-shadow:var(--shadow)}
    .pages-pane,.properties{min-height:0;overflow:auto;background:var(--surface-2)}.pages-pane{border-right:1px solid var(--line)}.properties{border-left:1px solid var(--line);padding:18px}
    .pane-head{padding:16px 15px 12px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;background:var(--surface-2);z-index:2;border-bottom:1px solid var(--line)}.pane-head strong{font-size:14px}.page-list{padding:12px;display:grid;gap:12px}.page-item{background:var(--surface);border:2px solid transparent;border-radius:10px;padding:7px;cursor:pointer;position:relative}.page-item.selected{border-color:var(--brand)}.page-item.dragging{opacity:.45}.thumb-wrap{background:#d9dfdc;border-radius:5px;aspect-ratio:.72;overflow:hidden;display:grid;place-items:center}.thumb-wrap canvas{display:block;max-width:100%;max-height:100%}.page-num{font-size:11px;font-weight:700;color:var(--muted);padding-top:6px;text-align:center}.page-badge{position:absolute;top:12px;right:12px;background:rgba(10,20,15,.78);color:#fff;border-radius:5px;padding:2px 5px;font-size:10px}
    .canvas-pane{min-width:0;min-height:0;background:#cbd2cf;display:flex;flex-direction:column}.canvas-toolbar{height:52px;background:var(--surface);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:center;gap:5px;padding:6px}.canvas-toolbar .zoom{font-size:12px;min-width:50px;text-align:center;color:var(--muted)}
    .document-stage{flex:1;min-height:0;overflow:auto;padding:34px;display:flex;align-items:flex-start;justify-content:center}.paper{position:relative;background:#fff;box-shadow:0 8px 30px rgba(0,0,0,.18);transform-origin:top center}.paper canvas{display:block;max-width:none}.empty-paper{width:min(520px,90%);aspect-ratio:.72;background:var(--surface);color:var(--muted);display:grid;place-items:center;text-align:center;padding:30px}
    .properties h3{font-size:16px;margin-bottom:16px}.prop-section{padding:15px 0;border-top:1px solid var(--line)}.prop-section:first-of-type{border-top:0;padding-top:0}.prop-label{font-size:12px;font-weight:700;color:var(--muted);margin-bottom:9px;display:block}.button-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.button-row button{font-size:12px;padding:0 8px}.wide{width:100%}.meta-list{display:grid;gap:9px;font-size:13px}.meta-row{display:flex;justify-content:space-between;gap:12px}.meta-row span:first-child{color:var(--muted)}
    .bottom-export{margin-top:auto;padding-top:16px}.progress{height:4px;background:var(--surface-3);border-radius:99px;overflow:hidden;margin-top:10px}.progress i{display:block;height:100%;background:var(--brand);width:0;transition:width .2s}
    .panel{position:fixed;inset:0;background:rgba(4,14,10,.58);z-index:30;display:grid;place-items:center;padding:20px}.dialog{width:min(520px,100%);max-height:min(720px,calc(100vh - 40px));overflow:auto;background:var(--surface);border-radius:18px;box-shadow:0 24px 80px rgba(0,0,0,.3)}.dialog-head{padding:20px 22px 14px;display:flex;justify-content:space-between;align-items:center}.dialog-head h2{font-size:21px}.dialog-body{padding:0 22px 22px}.field{margin:15px 0}.field label{display:block;font-size:13px;font-weight:700;margin-bottom:7px}.field input,.field select,.field textarea{width:100%;border:1px solid var(--line);background:var(--surface-2);border-radius:9px;padding:11px}.field textarea{min-height:90px;resize:vertical}.field-help{font-size:12px;color:var(--muted);margin-top:6px}.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}.check-row{display:flex;gap:10px;align-items:center;font-size:13px;margin:12px 0}.check-row input{accent-color:var(--brand)}
    .signature-pad{width:100%;height:190px;background:#fff;border:1px solid var(--line);border-radius:10px;touch-action:none}.color-row{display:grid;grid-template-columns:1fr auto;gap:10px}.color-row input[type=color]{width:48px;padding:4px;height:44px}
    .toast-stack{position:fixed;right:18px;bottom:18px;z-index:80;display:grid;gap:8px;width:min(360px,calc(100% - 36px))}.toast{background:var(--ink);color:var(--bg);padding:13px 15px;border-radius:11px;box-shadow:var(--shadow);display:flex;gap:10px;align-items:flex-start;font-size:13px;animation:toastIn .2s ease}.toast.error{background:var(--danger);color:#fff}@keyframes toastIn{from{transform:translateY(8px);opacity:0}}
    .loading{position:fixed;inset:0;background:rgba(10,20,15,.68);z-index:100;display:grid;place-items:center;color:#fff}.loader-card{text-align:center}.spinner{width:44px;height:44px;border:4px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 14px}@keyframes spin{to{transform:rotate(360deg)}}
    .empty-tools{grid-column:1/-1;padding:34px;text-align:center;color:var(--muted);background:var(--surface);border:1px dashed var(--line);border-radius:14px}
    .mobile-pages-toggle{display:none}
    @media(max-width:900px){.hero{grid-template-columns:1fr;gap:30px}.tool-grid{grid-template-columns:repeat(3,1fr)}.workgrid{grid-template-columns:210px 1fr}.properties{position:fixed;right:0;top:68px;bottom:0;width:min(320px,90vw);z-index:20;box-shadow:var(--shadow);transform:translateX(105%);transition:.2s}.properties.open{transform:translateX(0)}.mobile-pages-toggle{display:inline-flex}}
    @media(max-width:650px){.shell{width:min(100% - 22px,1180px)}.topbar{height:60px}.home{padding:30px 0 50px}.hero{gap:24px;margin-bottom:40px}.hero h1{font-size:39px}.hero p{font-size:16px}.dropzone{padding:28px 18px;min-height:240px}.section-head{align-items:stretch;flex-direction:column}.search{max-width:none}.tool-grid{grid-template-columns:1fr 1fr;gap:10px}.tool-card{min-height:145px;padding:15px}.workspace{height:calc(100vh - 60px)}.workspace-bar{flex-wrap:wrap}.workspace-bar .filename{order:3;flex-basis:100%}.workgrid{grid-template-columns:1fr;border-radius:13px 13px 0 0}.pages-pane{position:fixed;left:0;top:60px;bottom:0;width:min(250px,86vw);z-index:21;box-shadow:var(--shadow);transform:translateX(-105%);transition:.2s}.pages-pane.open{transform:translateX(0)}.document-stage{padding:18px}.canvas-toolbar{justify-content:flex-start;overflow:hidden}.canvas-toolbar .icon-btn:nth-of-type(5),.canvas-toolbar .icon-btn:nth-of-type(6){display:none}.hide-mobile{display:none}.toast-stack{bottom:12px;right:12px;width:calc(100% - 24px)}}
    @media(max-width:380px){.tool-grid{grid-template-columns:1fr}.hero h1{font-size:34px}}
    @media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation-duration:.01ms!important}}