:root {
  --bg:#07080a; --chrome:#111216; --sidebar:#0d0e12; --canvas:#15161b;
  --surface:#1b1c22; --line:rgba(255,255,255,.075); --line-strong:rgba(255,255,255,.12);
  --text:#f4f4f6; --muted:#8b8d98; --accent:#0a84ff; --accent-hover:#2997ff;
  --success:#31c66d; --danger:#ff5f57; --card-size:176px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display",Inter,"Segoe UI",sans-serif;
}
*{box-sizing:border-box} html{color-scheme:dark;background:var(--bg)}
body{margin:0;min-width:320px;min-height:100vh;background:var(--bg);color:var(--text);font-family:var(--font);font-size:14px;-webkit-font-smoothing:antialiased}
button,input{font:inherit} button{color:inherit;cursor:pointer} button:disabled{cursor:not-allowed;opacity:.35}
.app-window{width:100%;min-height:100vh;overflow:hidden;background:var(--chrome)}

.window-bar{height:52px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 18px;border-bottom:1px solid var(--line);background:rgba(18,19,23,.92);backdrop-filter:blur(26px) saturate(140%);-webkit-backdrop-filter:blur(26px) saturate(140%);position:relative;z-index:20}
.traffic-lights{display:flex;align-items:center;gap:8px}.traffic{width:12px;height:12px;border-radius:50%;box-shadow:inset 0 0 0 .5px rgba(0,0,0,.24)}
.traffic.red{background:#ff5f57}.traffic.yellow{background:#febc2e}.traffic.green{background:#28c840}
.brand{display:flex;align-items:center;gap:8px;color:#dadbe0;font-size:13px;font-weight:620;letter-spacing:-.01em}
.brand-mark{width:22px;height:22px;display:grid;place-items:center;border-radius:6px;background:linear-gradient(145deg,#208bff,#0066d6);box-shadow:inset 0 1px rgba(255,255,255,.25),0 5px 14px rgba(0,102,214,.25);color:#fff;font-size:12px;font-weight:800}
.local-badge{justify-self:end;display:flex;align-items:center;gap:7px;color:#8f929b;font-size:12px}.local-dot{width:6px;height:6px;border-radius:50%;background:var(--success);box-shadow:0 0 0 3px rgba(49,198,109,.1)}

.workspace-layout{display:grid;grid-template-columns:248px minmax(460px,1fr) 342px;min-height:calc(100vh - 52px)}
.sidebar{background:var(--sidebar);min-width:0}.tools-sidebar{border-right:1px solid var(--line);padding:23px 14px 18px;display:flex;flex-direction:column}
.export-sidebar{border-left:1px solid var(--line);padding:23px 14px 18px;overflow-y:auto;max-height:calc(100vh - 52px)}
.sidebar-section{padding:0 4px 22px;margin-bottom:20px;border-bottom:1px solid var(--line)}
.section-label{color:#686a73;font-size:11px;font-weight:650;letter-spacing:.09em;margin:0 0 11px 4px}

.drop-zone{min-height:188px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:18px 12px 13px;border:1px dashed rgba(255,255,255,.15);border-radius:14px;background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.016));outline:none;transition:border-color .18s ease,background .18s ease,transform .18s ease}
.drop-zone:hover,.drop-zone:focus-visible,.drop-zone.drag-active{border-color:rgba(10,132,255,.72);background:rgba(10,132,255,.07)}.drop-zone.drag-active{transform:scale(1.015)}
.upload-symbol{width:40px;height:40px;display:grid;place-items:center;margin-bottom:10px;border-radius:12px;background:rgba(10,132,255,.13);color:#4da3ff}.upload-symbol svg{width:21px;height:21px}
.drop-zone strong{font-size:14px;font-weight:650}.drop-zone>span{margin:5px 0 14px;max-width:160px;color:var(--muted);font-size:12px;line-height:1.4}
.load-status{padding:9px 2px 0;color:var(--muted);font-size:12px;line-height:1.4}.load-status:empty{display:none}

.btn{min-height:34px;border:1px solid transparent;border-radius:8px;padding:7px 12px;background:#2a2b31;color:#e8e8eb;font-size:13px;font-weight:570;transition:background .14s ease,border-color .14s ease,transform .14s ease,box-shadow .14s ease}
.btn:not(:disabled):active{transform:scale(.975)}.btn-primary{background:var(--accent);color:#fff;box-shadow:inset 0 1px rgba(255,255,255,.16)}.btn-primary:not(:disabled):hover{background:var(--accent-hover)}.btn-wide{width:100%}
.btn-subtle-danger{background:rgba(255,95,87,.08);color:#ff8882;border-color:rgba(255,95,87,.1)}.btn-subtle-danger:not(:disabled):hover{background:rgba(255,95,87,.15)}
.stat-list{display:grid;gap:2px}.stat-row{min-height:32px;display:flex;align-items:center;justify-content:space-between;padding:0 8px;border-radius:7px;color:var(--muted);font-size:13px}.stat-row:hover{background:rgba(255,255,255,.035);color:#b7b8be}.stat-row strong{color:#d9dae0;font-size:12px;font-variant-numeric:tabular-nums}
.sidebar-actions{display:grid;gap:3px}.sidebar-actions .section-label{margin-bottom:7px}
.nav-action{width:100%;min-height:35px;display:flex;align-items:center;gap:9px;border:0;border-radius:8px;padding:7px 8px;background:transparent;color:#aaaeb8;text-align:left;font-size:13px;transition:background .14s ease,color .14s ease}.nav-action svg{width:18px;height:18px;flex:0 0 auto;color:#727580}.nav-action:not(:disabled):hover{background:rgba(255,255,255,.055);color:#f0f0f2}.nav-action:not(:disabled):hover svg{color:#aeb1bc}
.privacy-note{margin-top:auto;display:flex;align-items:center;gap:8px;padding:0 8px;color:#60626b;font-size:11px;line-height:1.35}.privacy-note svg{width:17px;height:17px;flex:0 0 auto}

.canvas-panel{min-width:0;background:var(--canvas);display:flex;flex-direction:column}.canvas-toolbar{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 22px;border-bottom:1px solid var(--line)}
.title-block{display:flex;align-items:center;min-width:0}.title-block h1{margin:0;font-size:20px;font-weight:640;letter-spacing:-.025em}
.count-badge{min-width:22px;height:20px;display:inline-flex;align-items:center;justify-content:center;margin-left:8px;padding:0 6px;border-radius:7px;background:rgba(255,255,255,.075);color:#a6a8b1;font-size:11px;font-weight:650;font-variant-numeric:tabular-nums}
.selection-info{margin-left:14px;padding-left:14px;border-left:1px solid var(--line-strong);color:var(--muted);font-size:12px;white-space:nowrap}
.view-controls{display:flex;align-items:center;gap:10px;color:#6f717a}.zoom-range{width:112px;height:16px;appearance:none;-webkit-appearance:none;background:transparent}
.zoom-range::-webkit-slider-runnable-track{height:3px;border-radius:2px;background:#36373e}.zoom-range::-moz-range-track{height:3px;border-radius:2px;background:#36373e}
.zoom-range::-webkit-slider-thumb{width:14px;height:14px;margin-top:-5.5px;appearance:none;-webkit-appearance:none;border:2px solid #111216;border-radius:50%;background:#c7c8ce;box-shadow:0 1px 4px rgba(0,0,0,.4)}.zoom-range::-moz-range-thumb{width:12px;height:12px;border:2px solid #111216;border-radius:50%;background:#c7c8ce}
.zoom-icon{position:relative;display:inline-block;width:13px;height:10px;border:1.5px solid currentColor;border-radius:2px}.zoom-icon.large{width:17px;height:13px}.zoom-icon::after{content:"";position:absolute;left:2px;right:2px;bottom:2px;height:1px;background:currentColor;opacity:.5}
.selection-toolbar{min-height:53px;display:flex;align-items:center;justify-content:space-between;gap:15px;padding:9px 22px;border-bottom:1px solid var(--line);background:rgba(9,10,13,.25)}
.drag-tip{display:flex;align-items:center;gap:7px;color:#73757e;font-size:12px}.drag-tip svg{width:16px;height:16px}.primary-actions{display:flex;align-items:center;gap:7px}.primary-actions .btn-primary{display:flex;align-items:center;gap:7px}.primary-actions .btn-primary svg{width:15px;height:15px}

.pages-viewport{position:relative;min-height:420px;flex:1;overflow:auto}.pages-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(var(--card-size),1fr));align-items:start;gap:18px;padding:24px}
.page-card{position:relative;min-width:0;border:1px solid var(--line-strong);border-radius:12px;overflow:hidden;background:#1d1e23;user-select:none;box-shadow:0 2px 5px rgba(0,0,0,.15),0 14px 30px rgba(0,0,0,.06);transition:border-color .15s ease,transform .15s ease,opacity .15s ease,box-shadow .15s ease}
.page-card:hover{transform:translateY(-2px);border-color:rgba(255,255,255,.22);box-shadow:0 5px 10px rgba(0,0,0,.2),0 20px 34px rgba(0,0,0,.12)}
.page-card.selected{border-color:var(--accent);box-shadow:0 0 0 2px rgba(10,132,255,.22),0 15px 32px rgba(0,0,0,.2)}.page-card.dragging{opacity:.35;transform:scale(.96) rotate(-1deg)}.page-card.drag-over{border-color:#62aaff;box-shadow:-4px 0 0 var(--accent),0 16px 34px rgba(0,0,0,.2)}
.page-thumb{aspect-ratio:.72;display:grid;place-items:center;overflow:hidden;background:#f4f4f2;border-bottom:1px solid rgba(0,0,0,.2)}.page-thumb img{width:100%;height:100%;object-fit:contain;display:block}.thumb-placeholder{color:#6a6c73;font-size:11px;text-align:center;padding:10px;line-height:1.45}
.page-meta{padding:10px 11px 11px}.page-title-row{display:flex;align-items:center;justify-content:space-between;gap:8px}.page-title{color:#e2e2e5;font-size:12px;font-weight:620}.page-source{margin-top:4px;color:#777983;font-size:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.page-order{position:absolute;left:8px;top:8px;z-index:2;min-width:25px;height:25px;display:grid;place-items:center;padding:0 6px;border:1px solid rgba(255,255,255,.16);border-radius:7px;background:rgba(17,18,22,.78);color:#e8e8eb;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);font-size:10px;font-weight:700;font-variant-numeric:tabular-nums}
.page-check{position:absolute;right:9px;top:9px;z-index:3;width:20px;height:20px;margin:0;appearance:none;-webkit-appearance:none;border:1.5px solid rgba(0,0,0,.4);border-radius:50%;background:rgba(255,255,255,.9);cursor:pointer;transition:background .14s ease,border-color .14s ease,box-shadow .14s ease}.page-check:checked{border-color:var(--accent);background:var(--accent);box-shadow:0 0 0 2px rgba(255,255,255,.65)}.page-check:checked::after{content:"";position:absolute;left:5px;top:2px;width:5px;height:9px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}.drag-handle{color:#5c5e67;font-size:14px;letter-spacing:-2px}

.empty-state{min-height:calc(100vh - 180px);display:grid;justify-items:center;align-content:center;text-align:center;padding:40px 24px}.pages-grid:not(:empty)+.empty-state{display:none}
.empty-visual{position:relative;width:104px;height:112px;margin-bottom:22px}.sheet{position:absolute;width:70px;height:92px;border:1px solid rgba(255,255,255,.14);border-radius:9px}.sheet-back{left:10px;top:3px;background:#25262c;transform:rotate(-7deg)}.sheet-front{left:24px;top:12px;display:grid;place-items:center;background:linear-gradient(145deg,#282a31,#202126);box-shadow:0 14px 35px rgba(0,0,0,.28)}.sheet-front span{padding:5px 7px;border-radius:5px;background:rgba(10,132,255,.13);color:#4da3ff;font-size:10px;font-weight:750}.empty-plus{position:absolute;right:2px;bottom:5px;width:30px;height:30px;display:grid;place-items:center;border:3px solid var(--canvas);border-radius:50%;background:var(--accent);color:#fff;font-size:20px;font-weight:300}
.empty-state h2{margin:0 0 8px;font-size:18px;font-weight:620;letter-spacing:-.02em}.empty-state p{max-width:410px;margin:0 0 18px;color:var(--muted);font-size:13px;line-height:1.55}.empty-upload-btn{min-width:132px}

.export-header{min-height:51px;display:flex;align-items:flex-start;justify-content:space-between;padding:0 4px 13px}.export-header .section-label{margin-left:0;margin-bottom:7px}.export-header h2{display:flex;align-items:center;margin:0;font-size:17px;font-weight:630;letter-spacing:-.02em}
.export-all-card{min-height:62px;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px;border:1px solid var(--line);border-radius:11px;background:rgba(255,255,255,.026)}.export-all-copy{min-width:0;display:flex;align-items:center;gap:10px}.export-all-copy>div:last-child{min-width:0}.export-all-copy strong,.export-all-copy span{display:block}.export-all-copy strong{font-size:13px;font-weight:610}.export-all-copy span{margin-top:3px;color:var(--muted);font-size:11px}
.mini-doc-icon{width:34px;height:40px;display:grid;place-items:center;flex:0 0 auto;border:1px solid rgba(10,132,255,.2);border-radius:7px;background:rgba(10,132,255,.1);color:#4da3ff;font-size:9px;font-weight:750}
.icon-button{width:34px;height:34px;display:grid;place-items:center;flex:0 0 auto;border:0;border-radius:8px;background:#2a2b31;color:#bfc0c6;transition:background .14s ease,color .14s ease,transform .14s ease}.icon-button svg{width:18px;height:18px}.icon-button:not(:disabled):hover{background:var(--accent);color:#fff}.icon-button:not(:disabled):active{transform:scale(.94)}
.export-divider{display:flex;align-items:center;gap:9px;margin:22px 4px 11px;color:#595b64;font-size:10px;font-weight:650;letter-spacing:.08em}.export-divider::after{content:"";height:1px;flex:1;background:var(--line)}
.groups-list{display:grid;gap:10px}.group-card{overflow:hidden;border:1px solid var(--line-strong);border-radius:12px;background:#15161a}.group-head{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:6px;padding:8px;border-bottom:1px solid var(--line)}
.group-name{width:100%;min-width:0;border:1px solid transparent;border-radius:7px;outline:none;background:transparent;color:#e6e6e9;padding:6px 7px;font-size:13px;font-weight:610}.group-name:focus{border-color:rgba(10,132,255,.5);background:rgba(10,132,255,.06)}.group-actions{display:flex;align-items:center;gap:3px}
.btn-small{min-height:28px;padding:5px 8px;border-radius:7px;font-size:11px}.btn-ghost{background:transparent;color:#9b9da6}.btn-ghost:not(:disabled):hover{background:rgba(255,255,255,.06);color:#e7e7e9}.btn-danger-soft{background:rgba(255,95,87,.07);color:#ff7770}.btn-danger-soft:not(:disabled):hover{background:rgba(255,95,87,.14)}.btn-success{background:var(--accent);color:#fff}.btn-success:not(:disabled):hover{background:var(--accent-hover)}
.group-pages{min-height:110px;display:flex;gap:7px;overflow-x:auto;padding:10px;scrollbar-width:thin;scrollbar-color:#34353c transparent}.group-page{position:relative;flex:0 0 70px;overflow:hidden;border:1px solid var(--line-strong);border-radius:8px;background:#202127;transition:border-color .14s ease,opacity .14s ease}.group-page.dragging{opacity:.35}.group-page.drag-over{border-color:var(--accent);box-shadow:-3px 0 var(--accent)}.group-page img{width:70px;height:88px;display:block;object-fit:cover;background:#f3f3f1}.group-page-placeholder{width:70px;height:88px;display:grid;place-items:center;padding:5px;background:#24252b;color:#81838c;font-size:9px;text-align:center}.group-page-label{padding:5px;color:#8c8e97;font-size:9px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.group-remove-page{position:absolute;right:3px;top:3px;z-index:2;width:19px;height:19px;display:grid;place-items:center;padding:0;border:0;border-radius:50%;background:rgba(10,10,12,.82);color:#dadade;font-size:13px;line-height:1;opacity:0;transition:opacity .14s ease,background .14s ease}.group-page:hover .group-remove-page{opacity:1}.group-remove-page:hover{background:var(--danger);color:#fff}
.group-foot{display:flex;align-items:center;gap:7px;padding:8px 10px 10px;border-top:1px solid var(--line)}.group-stat{margin-right:auto;color:var(--muted);font-size:10px}
.empty-groups{min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:25px 20px;border:1px dashed rgba(255,255,255,.09);border-radius:12px;color:var(--muted)}.groups-list:not(:empty)+.empty-groups{display:none}.empty-group-icon{width:42px;height:42px;display:grid;place-items:center;margin-bottom:10px;border-radius:12px;background:rgba(255,255,255,.04);color:#676973}.empty-group-icon svg{width:21px;height:21px}.empty-groups strong{margin-bottom:4px;color:#a9abb3;font-size:13px;font-weight:600}.empty-groups span{max-width:190px;font-size:11px;line-height:1.45}

.toast{position:fixed;left:50%;bottom:24px;z-index:100;max-width:min(540px,calc(100vw - 30px));padding:11px 14px;border:1px solid var(--line-strong);border-radius:11px;background:rgba(34,35,41,.94);color:#f0f0f2;box-shadow:0 18px 50px rgba(0,0,0,.4);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);font-size:12px;opacity:0;pointer-events:none;transform:translate(-50%,12px);transition:opacity .18s ease,transform .18s ease}.toast.show{opacity:1;transform:translate(-50%,0)}.toast.error{border-color:rgba(255,95,87,.38);color:#ffb0ac}
::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{border:3px solid transparent;border-radius:8px;background:#3a3b42;background-clip:padding-box}::-webkit-scrollbar-thumb:hover{background:#4a4b53;background-clip:padding-box}

@media(max-width:1180px){.workspace-layout{grid-template-columns:220px minmax(420px,1fr) 304px}}
@media(max-width:920px){.workspace-layout{grid-template-columns:220px minmax(0,1fr)}.export-sidebar{grid-column:1/-1;max-height:none;border-left:0;border-top:1px solid var(--line)}.groups-list{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}}
@media(max-width:680px){.window-bar{grid-template-columns:auto 1fr auto}.traffic-lights{display:none}.brand{justify-self:start}.workspace-layout{display:block}.tools-sidebar{border-right:0;border-bottom:1px solid var(--line)}.tools-sidebar .sidebar-section:not(.upload-section),.privacy-note{display:none}.upload-section{border:0;margin:0;padding-bottom:0}.drop-zone{min-height:130px}.canvas-toolbar{min-height:62px;padding:11px 14px}.selection-info,.drag-tip{display:none}.selection-toolbar{justify-content:flex-end;padding:8px 14px}.pages-grid{gap:10px;padding:14px;grid-template-columns:repeat(2,minmax(0,1fr))}.view-controls{gap:6px}.zoom-range{width:72px}.export-sidebar{max-height:none}}