:root{
  --bg:#EDF0F4; --surface:#FFFFFF; --sunk:#E3E7ED; --ink:#161E29; --muted:#566273; --line:#D2D8E0;
  --accent:#1D4E8F; --accent-ink:#FFFFFF; --accent-soft:#DCE6F3;
  --amber:#C07F00; --amber-soft:#FAEDCC; --danger:#B3261E; --danger-soft:#F8DEDB; --ok:#1C7340; --ok-soft:#DAF0E2;
  --shadow:0 1px 2px rgba(22,30,41,.06),0 4px 16px rgba(22,30,41,.06);
  --ui:"Segoe UI Variable Text","Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
  --num:"Cascadia Mono",Consolas,"SF Mono",Menlo,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0F1318; --surface:#171D25; --sunk:#0B0E12; --ink:#E3E8EE; --muted:#93A0B0; --line:#29323D;
    --accent:#7AA7E6; --accent-ink:#0A1220; --accent-soft:#1B2A3E;
    --amber:#EDB443; --amber-soft:#382C12; --danger:#F08C82; --danger-soft:#3A1D1B; --ok:#6DCB92; --ok-soft:#15301F;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 4px 16px rgba(0,0,0,.25);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0F1318; --surface:#171D25; --sunk:#0B0E12; --ink:#E3E8EE; --muted:#93A0B0; --line:#29323D;
  --accent:#7AA7E6; --accent-ink:#0A1220; --accent-soft:#1B2A3E;
  --amber:#EDB443; --amber-soft:#382C12; --danger:#F08C82; --danger-soft:#3A1D1B; --ok:#6DCB92; --ok-soft:#15301F;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 4px 16px rgba(0,0,0,.25);
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 var(--ui);-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}
button,input,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}

.app{display:grid;grid-template-columns:250px minmax(0,1fr);height:100%}
/* rail */
.rail{background:var(--surface);border-right:1px solid var(--line);display:flex;flex-direction:column;gap:18px;padding:20px 14px;overflow-y:auto}
.brand{display:flex;align-items:center;gap:10px;padding:0 6px}
.brand-mark{width:34px;height:34px;border-radius:8px;display:block;flex:none}
.brand > div{flex:1;min-width:0}
.brand b{display:block;font-size:17px;line-height:1.1}
.brand small{color:var(--muted);font-size:12px}
.offline{display:flex;align-items:center;gap:8px;margin:0 6px;padding:8px 10px;border-radius:8px;background:var(--ok-soft);color:var(--ok);font-size:12px;line-height:1.35}
.offline i{width:8px;height:8px;border-radius:50%;background:var(--ok);flex:none}
.nav{display:flex;flex-direction:column;gap:14px}
.nav-group{display:flex;flex-direction:column;gap:2px}
.nav-label{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:0 10px 4px;font-weight:600}
.nav button{display:flex;align-items:center;gap:10px;width:100%;border:0;background:none;padding:8px 10px;border-radius:8px;cursor:pointer;text-align:left;color:var(--ink)}
.nav button svg{flex:none;color:var(--muted)}
.nav button:hover{background:var(--sunk)}
.nav button[aria-current="page"]{background:var(--accent-soft);color:var(--accent);font-weight:600}
.nav button[aria-current="page"] svg{color:var(--accent)}
.rail-foot{margin-top:auto;font-size:12px;color:var(--muted);padding:0 6px;line-height:1.45}

/* main */
main{overflow-y:auto;padding-block:26px 40px;padding-inline:28px}
.head{max-width:1180px;margin:0 auto 18px;display:flex;gap:14px;align-items:flex-end;justify-content:space-between;flex-wrap:wrap}
.head h1{margin:0;font-size:26px;line-height:1.2;text-wrap:balance;letter-spacing:-.01em}
.head p{margin:4px 0 0;color:var(--muted);max-width:62ch}
.ws{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:20px;align-items:start}
.col-area{display:flex;flex-direction:column;gap:10px}
.col-main{display:flex;flex-direction:column;gap:14px;min-width:0}
.side{position:sticky;top:0;display:flex;flex-direction:column;gap:14px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px}
.panel h2{margin:0 0 12px;font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}

/* drop zone */
.drop{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;text-align:center;border:2px dashed var(--line);border-radius:14px;background:var(--surface);padding:48px 20px;cursor:pointer;transition:border-color .15s,background .15s}
.drop:hover,.ws.dragging .drop{border-color:var(--accent);background:var(--accent-soft)}
.drop input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.drop .btn-fake{background:var(--accent);color:var(--accent-ink);padding:10px 20px;border-radius:8px;font-weight:600;font-size:15px}
.drop .hint{color:var(--muted);font-size:13px}
.drop svg{color:var(--accent);margin-bottom:6px}
.drop.compact{flex-direction:row;padding:10px 14px;gap:12px;justify-content:flex-start;border-width:1.5px}
.drop.compact .ico{display:none}
.drop.compact .btn-fake{padding:6px 12px;font-size:13px}
.drop:focus-within{border-color:var(--accent)}

/* file list */
.list{display:flex;flex-direction:column;gap:8px}
.row{display:grid;grid-template-columns:auto 52px minmax(0,1fr) auto;gap:12px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:8px 10px}
.row.drag-over{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}
.row .idx{font-family:var(--num);font-size:12px;color:var(--muted);width:22px;text-align:right;font-variant-numeric:tabular-nums}
.thumb{width:52px;height:64px;border-radius:4px;background:var(--sunk);display:grid;place-items:center;overflow:hidden}
.thumb img{max-width:100%;max-height:100%;display:block;box-shadow:0 0 0 1px var(--line)}
.row .name{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.row .meta{color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}
.row .acts{display:flex;gap:2px}
.icon-btn{border:0;background:none;width:32px;height:32px;border-radius:6px;display:grid;place-items:center;cursor:pointer;color:var(--muted)}
.icon-btn:hover{background:var(--sunk);color:var(--ink)}
.icon-btn.del:hover{background:var(--danger-soft);color:var(--danger)}
.icon-btn:disabled{opacity:.3;cursor:default;background:none}
.row[draggable="true"]{cursor:grab}

/* page grid */
.grid-tools{display:flex;flex-wrap:wrap;gap:8px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:8px 10px}
.grid-tools .count{margin-right:auto;color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}
.pages{display:grid;grid-template-columns:repeat(auto-fill,minmax(128px,1fr));gap:12px}
.tile{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:8px 8px 6px;display:flex;flex-direction:column;gap:6px;user-select:none}
.tile .pv{aspect-ratio:1/1.2;max-width:100%;background:var(--sunk);border-radius:4px;display:grid;place-items:center;overflow:hidden}
.tile .pv img{max-width:92%;max-height:92%;display:block;box-shadow:0 1px 3px rgba(0,0,0,.18);transition:transform .2s;background:#fff}
.tile .cap{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;gap:4px;min-height:22px}
.tile .cap b{color:var(--ink);font-family:var(--num);font-weight:600}
.tile .tag{font-size:11px;padding:1px 7px;border-radius:99px;font-weight:600;white-space:nowrap}
.tile.g0 .tag{background:var(--accent-soft);color:var(--accent)}
.tile.g1 .tag{background:var(--amber-soft);color:var(--amber)}
.tile.g0{border-color:var(--accent)}
.tile.g1{border-color:var(--amber)}
.tile.dim{opacity:.42}
.tile.sel{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent)}
.tile.org{cursor:pointer}
.tile.org[draggable="true"]{cursor:grab}
.tile .hover-acts{position:absolute;top:12px;right:12px;display:flex;gap:4px;opacity:0;transition:opacity .12s}
.tile:hover .hover-acts,.tile:focus-within .hover-acts{opacity:1}
.tile .hover-acts .icon-btn{background:var(--surface);box-shadow:var(--shadow);width:28px;height:28px}
.tile .check{position:absolute;top:12px;left:12px;width:20px;height:20px;border-radius:5px;border:1.5px solid var(--line);background:var(--surface);display:grid;place-items:center;color:var(--accent-ink)}
.tile.sel .check{background:var(--accent);border-color:var(--accent)}
.tile.drag-over{box-shadow:-4px 0 0 0 var(--amber)}
.tile .src{font-size:11px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}
@media (hover:none){.tile .hover-acts{opacity:1}}

/* options */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field:last-child{margin-bottom:0}
.field > label,.field > .lbl{font-weight:600;font-size:13px}
.field .help{color:var(--muted);font-size:12px;line-height:1.4}
.inp{width:100%;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:8px 10px}
.inp:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.choices{display:flex;flex-direction:column;gap:6px}
.choice{display:flex;gap:10px;align-items:flex-start;padding:9px 10px;border:1px solid var(--line);border-radius:8px;cursor:pointer;background:var(--bg)}
.choice:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}
.choice input{margin:3px 0 0;accent-color:var(--accent)}
.choice span{display:flex;flex-direction:column;line-height:1.35}
.choice small{color:var(--muted);font-size:12px}
.seg{display:flex;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:3px;gap:3px}
.seg label{flex:1;text-align:center;padding:5px 6px;border-radius:6px;cursor:pointer;font-size:13px}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg label:has(input:checked){background:var(--surface);box-shadow:var(--shadow);font-weight:600;color:var(--accent)}
.seg label:has(input:focus-visible){outline:2px solid var(--accent)}
.range-row{display:flex;align-items:center;gap:10px}
.range-row input[type=range]{flex:1;accent-color:var(--accent)}
.range-row output{font-family:var(--num);font-size:12px;min-width:42px;text-align:right;font-variant-numeric:tabular-nums}
.check-line{display:flex;gap:8px;align-items:center;font-size:13px;cursor:pointer}
.check-line input{accent-color:var(--accent)}
.note{font-size:12px;line-height:1.45;padding:9px 11px;border-radius:8px;background:var(--amber-soft);color:var(--ink)}
.note b{color:var(--amber)}
input[type=color]{width:44px;height:36px;border:1px solid var(--line);border-radius:8px;background:var(--bg);padding:3px;cursor:pointer}
.preview{border-radius:8px;background:var(--sunk);display:grid;place-items:center;padding:10px;min-height:120px}
.preview canvas{max-width:100%;height:auto;box-shadow:0 1px 4px rgba(0,0,0,.2);background:#fff}
.preview .ph{color:var(--muted);font-size:12px}

/* action */
.action{display:flex;flex-direction:column;gap:10px}
.sum{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.sum b{color:var(--ink)}
.run{border:0;background:var(--accent);color:var(--accent-ink);font-weight:700;font-size:15px;padding:12px 16px;border-radius:10px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px}
.run:hover{filter:brightness(1.08)}
.run:disabled{background:var(--sunk);color:var(--muted);cursor:not-allowed;filter:none}
.ghost{border:1px solid var(--line);background:var(--surface);padding:6px 10px;border-radius:7px;cursor:pointer;font-size:13px;display:inline-flex;align-items:center;gap:6px}
.ghost:hover{border-color:var(--accent);color:var(--accent)}
.ghost.danger:hover{border-color:var(--danger);color:var(--danger)}
.ghost:disabled{opacity:.45;cursor:default;border-color:var(--line);color:inherit}

/* result */
.result{background:var(--ok-soft);border:1px solid var(--ok);border-radius:12px;padding:14px 16px;display:flex;flex-direction:column;gap:10px}
.result h3{margin:0;font-size:15px;color:var(--ok);display:flex;align-items:center;gap:8px}
.out{display:flex;align-items:center;gap:12px;background:var(--surface);border-radius:8px;padding:8px 10px;flex-wrap:wrap}
.out .n{font-weight:600;flex:1;min-width:0;overflow-wrap:anywhere}
.out .s{color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}
.result .notes{font-size:13px;line-height:1.5}
.result .notes div + div{margin-top:2px}

.empty-tip{color:var(--muted);font-size:13px;padding:4px 2px}

/* toast + busy */
#toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);display:flex;flex-direction:column;gap:8px;z-index:50;width:min(460px,calc(100% - 32px))}
.t{background:var(--ink);color:var(--bg);padding:10px 14px;border-radius:10px;box-shadow:var(--shadow);font-size:13px;animation:up .2s ease}
.t.err{background:var(--danger);color:#fff}
@keyframes up{from{transform:translateY(8px);opacity:0}}
#busy{position:fixed;inset:0;background:rgba(10,14,20,.45);display:grid;place-items:center;z-index:40;padding:16px}
#busy .card{background:var(--surface);border-radius:14px;padding:22px 24px;width:min(380px,100%);box-shadow:var(--shadow);display:flex;flex-direction:column;gap:12px}
#busy b{font-size:15px}
#busy .txt{color:var(--muted);font-size:13px;overflow-wrap:anywhere}
.bar{height:6px;background:var(--sunk);border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;width:30%;background:var(--accent);border-radius:99px;transition:width .2s}
.bar.indet i{animation:slide 1.1s ease-in-out infinite}
@keyframes slide{0%{transform:translateX(-100%)}100%{transform:translateX(340%)}}

/* editor */
.ed-bar{display:flex;flex-wrap:wrap;gap:6px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:6px;position:sticky;top:0;z-index:6}
.ed-group{display:flex;gap:2px;flex-wrap:wrap}
.ed-group + .ed-group{border-left:1px solid var(--line);padding-left:6px}
.ed-hist{margin-left:auto}
.ed-tool{display:flex;flex-direction:column;align-items:center;gap:2px;min-width:56px;border:0;background:none;border-radius:8px;padding:6px 6px 4px;cursor:pointer;color:var(--muted);font-size:11.5px;line-height:1.2}
.ed-tool svg{color:currentColor}
.ed-tool span{color:var(--ink)}
.ed-tool:hover{background:var(--sunk);color:var(--ink)}
.ed-tool[aria-pressed="true"]{background:var(--accent-soft);color:var(--accent)}
.ed-tool[aria-pressed="true"] span{color:var(--accent);font-weight:600}
.ed-tool.icon-only{min-width:40px;justify-content:center;padding:8px}
.ed-tool:disabled{opacity:.35;cursor:default;background:none}
.ed-stage{position:relative;background:var(--sunk);border-radius:12px;padding:12px;overflow:auto;display:flex;align-items:flex-start;height:calc(100vh - 250px);height:calc(100dvh - 250px);min-height:380px;touch-action:pan-x pan-y;overscroll-behavior:contain}
.ed-page{position:relative;box-shadow:0 1px 3px rgba(0,0,0,.2),0 6px 24px rgba(0,0,0,.12);background:#fff;flex:none;margin:0 auto}
.ed-layer.panning,.ed-layer.panning .ed-obj{cursor:grabbing!important}
/* existing fields / annotations (numbers & dates stamped by e-signing software) */
.ed-ann{position:absolute;pointer-events:none;border-radius:2px}
.ed-layer[data-mode="remove"] .ed-ann{pointer-events:auto;outline:2px dashed var(--danger);outline-offset:1px;background:rgba(179,38,30,.08);cursor:pointer}
.ed-layer[data-mode="remove"] .ed-ann:hover{background:rgba(179,38,30,.2);outline-style:solid}

/* printed text runs, removable in Xóa mode */
.ed-txt{position:absolute;border-radius:2px;cursor:pointer}
.ed-txt:hover{outline:1.5px solid var(--accent);background:rgba(29,78,143,.14)}

/* erase / remove */
.ed-layer[data-mode="remove"]{cursor:crosshair}
.ed-layer[data-mode="remove"] .ed-obj:hover{outline:2px solid var(--danger);outline-offset:2px;background-color:rgba(179,38,30,.08)}
.ed-layer[data-mode="erase"]{cursor:cell}
.ed-layer[data-mode="erase"] .ed-erase svg path:last-child,.ed-obj.sel svg path:last-child{filter:drop-shadow(0 0 .6px rgba(0,0,0,.45))}
.redact{display:flex;flex-direction:column;gap:6px;padding:10px 12px;border-radius:8px;background:var(--amber-soft)}
.redact.on{background:var(--danger-soft)}

/* text formatting */
.fmt-row{display:flex;gap:8px;flex-wrap:wrap}
.fmt-group{display:flex;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:2px;gap:2px}
.fmt-btn{min-width:34px;height:32px;border:0;background:none;border-radius:6px;cursor:pointer;font-size:15px;display:grid;place-items:center;color:var(--ink);padding:0 6px}
.fmt-btn:hover{background:var(--sunk)}
.fmt-btn[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink)}
.size-row{display:flex;gap:6px;align-items:center}
.size-row .inp{width:auto;flex:1;min-width:56px;text-align:center}
.size-row .fmt-btn{border:1px solid var(--line);background:var(--bg);font-size:13px;font-weight:600}
.size-row .size-preset{flex:none;width:72px;text-align:left}
.font-sel{font-size:15px}
.ed-sample{padding:10px 12px;border:1px dashed var(--line);border-radius:8px;background:#fff;font-size:17px;line-height:1.3;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.ed-zoom{display:flex;align-items:center;gap:4px;margin-left:8px}
.ed-zoom .fmt-btn{border:1px solid var(--line);background:var(--surface)}
.ed-zsel{width:auto;max-width:150px;padding:5px 8px;font-variant-numeric:tabular-nums}
.ed-canvas{display:block}
.ed-layer{position:absolute;inset:0;cursor:default}
.ed-layer:not([data-mode="select"]){cursor:crosshair;touch-action:none}
.ed-layer[data-mode="text"]{cursor:text}
.ed-obj{position:absolute;touch-action:none;box-sizing:border-box}
.ed-layer[data-mode="select"] .ed-obj{cursor:move}
.ed-text{white-space:pre;line-height:1.2;text-underline-offset:.1em;text-decoration-thickness:.06em;text-decoration-skip-ink:none;min-width:.6em;min-height:1.2em;outline:none}
.ed-text.editing{cursor:text;outline:1.5px solid var(--accent);outline-offset:2px;background:rgba(255,255,255,.55)}
.ed-ink svg{display:block;overflow:visible;pointer-events:none}
.ed-ink{pointer-events:none}
.ed-ink svg path{pointer-events:stroke}
.ed-highlight{opacity:.42;mix-blend-mode:multiply}
.ed-image img{width:100%;height:100%;display:block;pointer-events:none;user-select:none}
.ed-obj.sel{outline:1.5px dashed var(--accent);outline-offset:3px}
.ed-handle{position:absolute;right:-9px;bottom:-9px;width:14px;height:14px;border-radius:50%;background:var(--accent);border:2px solid #fff;cursor:nwse-resize;box-shadow:0 1px 3px rgba(0,0,0,.3)}
@media (pointer:coarse){.ed-handle{width:22px;height:22px;right:-13px;bottom:-13px}}
.ed-nav{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap}
.ed-pinfo{display:flex;align-items:center;gap:6px;font-variant-numeric:tabular-nums;color:var(--muted)}
.ed-pno{width:64px;text-align:center;padding:5px 6px}
.ed-props{display:flex;flex-direction:column;gap:12px}
.ed-props .field{margin-bottom:0}
.ed-ptitle{font-weight:700;font-size:14px}
.swatches{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.swatch{width:26px;height:26px;border-radius:50%;border:2px solid var(--surface);background:var(--c);box-shadow:0 0 0 1px var(--line);cursor:pointer;padding:0}
.swatch.on{box-shadow:0 0 0 2px var(--accent)}
.swatch[data-c="#FFFFFF"],.swatch[data-c="#F5F5F0"],.swatch[data-c="#FFF8E7"]{box-shadow:0 0 0 1px #9AA4B2}
.swatch[data-c="#FFFFFF"].on,.swatch[data-c="#F5F5F0"].on,.swatch[data-c="#FFF8E7"].on{box-shadow:0 0 0 2px var(--accent)}
.sig-body{display:flex;flex-direction:column;gap:12px}
.sig-pad{width:100%;height:auto;aspect-ratio:900/340;background:#fff;border:1.5px dashed var(--line);border-radius:10px;touch-action:none;cursor:crosshair}
.sig-row{display:flex;gap:10px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.sig-row .seg{flex:1;min-width:180px}
.sig-saved{height:24px;width:auto;background:#fff;border-radius:4px}

/* contact badge */
.contact-wrap{position:fixed;right:16px;bottom:calc(16px + env(safe-area-inset-bottom,0px));z-index:30;display:flex;flex-direction:column;align-items:flex-end;gap:8px}
.contact{display:inline-flex;align-items:center;gap:8px;padding:9px 16px 9px 13px;border-radius:99px;border:0;cursor:pointer;background:#14202B;color:#E8EEF4;font:inherit;font-weight:700;font-size:14px;letter-spacing:.02em;font-variant-numeric:tabular-nums;box-shadow:0 2px 10px rgba(0,0,0,.25)}
.contact svg{color:#35C5B5;flex:none}
.contact:hover,.contact[aria-expanded="true"]{background:#1D4E8F}
.contact-menu{background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:0 8px 30px rgba(0,0,0,.18);padding:6px;width:250px;display:flex;flex-direction:column;gap:2px;animation:up .15s ease}
.cm-title{font-size:12px;color:var(--muted);padding:6px 10px 4px;font-variant-numeric:tabular-nums}
.cm-item{display:flex;align-items:center;gap:12px;padding:9px 10px;border-radius:10px;text-decoration:none;color:var(--ink);background:none;border:0;font:inherit;text-align:left;cursor:pointer;width:100%}
.cm-item:hover,.cm-item:focus-visible{background:var(--sunk)}
.cm-item span:last-child{display:flex;flex-direction:column;line-height:1.3}
.cm-item small{color:var(--muted);font-size:12px}
.cm-ic{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;flex:none;color:#fff}
.cm-call{background:#1C9C5B}
.cm-zalo{background:#0068FF;font-weight:800;font-size:11px;letter-spacing:.01em}
.cm-copy{background:var(--sunk);color:var(--ink)}
@media (max-width: 760px){.contact-wrap{bottom:calc(84px + env(safe-area-inset-bottom,0px));right:12px}.contact{padding:6px 12px 6px 10px;font-size:12.5px}}

/* home */
.home-top{max-width:1180px;margin:0 auto 18px}
.home-search{max-width:520px;font-size:15px;padding:10px 14px;background:var(--surface)}
.home{max-width:1180px;margin:0 auto;display:flex;flex-direction:column;gap:22px}
.home-group h2{margin:0 0 10px;font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.home-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px}
.home-card{display:flex;gap:12px;align-items:flex-start;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px;cursor:pointer;color:var(--ink);transition:border-color .12s,transform .12s}
.home-card:hover{border-color:var(--accent);transform:translateY(-1px)}
.hc-ic{width:38px;height:38px;border-radius:10px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;flex:none}
.hc-t{display:flex;flex-direction:column;gap:3px;min-width:0}
.hc-t b{font-size:14px}
.hc-t small{color:var(--muted);font-size:12px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.thumb .ext{font-size:11px;font-weight:700;color:var(--accent);letter-spacing:.03em}
.tile.pick{cursor:pointer}
.tile.pick:hover{border-color:var(--accent)}
/* crop */
.crop-stage{background:var(--sunk);border-radius:12px;padding:12px;display:flex;justify-content:center;overflow:auto}
.crop-wrap{position:relative;touch-action:none;cursor:crosshair;flex:none;box-shadow:0 1px 3px rgba(0,0,0,.2)}
.crop-canvas{display:block;background:#fff}
.crop-box{position:absolute;outline:2px solid var(--accent);box-shadow:0 0 0 9999px rgba(10,14,20,.45);pointer-events:none}
.crop-wrap{overflow:hidden}
/* compare */
.cmp{display:flex;flex-direction:column;gap:14px}
.cmp-sum{font-weight:700;padding:10px 12px;background:var(--amber-soft);border-radius:10px;margin-bottom:10px}
.cmp-page{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:10px}
.cmp-page.changed{border-color:var(--danger)}
.cmp-h{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.cmp-h b{color:var(--ink)}
.cmp-imgs{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.cmp-imgs figure{margin:0;display:flex;flex-direction:column;gap:4px}
.cmp-imgs figcaption{font-size:12px;color:var(--muted)}
.cmp-imgs img{width:100%;border:1px solid var(--line);border-radius:4px;background:#fff}
.cmp-none{aspect-ratio:1/1.3;display:grid;place-items:center;background:var(--sunk);border-radius:4px;color:var(--muted);font-size:12px}
.cmp-diff{font-size:13px;line-height:1.6;max-height:220px;overflow:auto;padding:8px 10px;background:var(--bg);border-radius:8px;white-space:pre-wrap;overflow-wrap:anywhere}
.cmp-diff ins{background:var(--ok-soft);color:var(--ok);text-decoration:none;border-radius:3px;padding:0 2px}
.cmp-diff del{background:var(--danger-soft);color:var(--danger);border-radius:3px;padding:0 2px}
@media (max-width:760px){.home-grid{grid-template-columns:1fr 1fr}.home-card{padding:10px;gap:8px}.hc-ic{width:32px;height:32px}.hc-t small{display:none}}

/* forms */
.frm-pages{display:flex;flex-direction:column;align-items:center;gap:6px}
.frm-cap{align-self:stretch;font-size:12px;color:var(--muted);margin-top:8px}
.frm-page{position:relative;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.2);max-width:100%}
.frm-page canvas{display:block}
.frm-in{position:absolute;box-sizing:border-box;border:1.5px solid #6EA0E6;background:rgba(220,234,255,.82);color:#111;padding:0 4px;border-radius:3px;font-family:"Times New Roman",serif;resize:none}
.frm-in:focus{outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px var(--accent-soft)}
.frm-chk{position:absolute;margin:0;accent-color:var(--accent);cursor:pointer}

.cam-btn{justify-content:center;padding:11px 12px;font-weight:700;font-size:15px;margin-bottom:14px;width:100%;border-color:var(--accent);color:var(--accent)}

/* excel render sandbox */
.x-sheet{display:inline-block;padding:0;background:#fff;color:#000;font:13px/1.35 Calibri,Carlito,Arial,sans-serif}
.x-sheet .x-title{font-weight:700;font-size:14px;margin:0 0 6px}
.x-sheet table{border-collapse:collapse}
.x-sheet td{padding:3px 6px;white-space:nowrap;vertical-align:bottom}
.x-sheet.grid td{border:1px solid #9aa0a6}
.x-sheet td.num{text-align:right;font-variant-numeric:tabular-nums}
.x-sheet tr:first-child td{font-weight:700;background:#eef1f5}

/* AI settings */
.ai-set{display:flex;flex-direction:column;gap:12px;margin-bottom:12px}
.ai-status{font-size:13px;font-weight:600;padding:8px 10px;border-radius:8px;background:var(--amber-soft)}
.ai-status.ok{background:var(--ok-soft);color:var(--ok)}
.ai-key-row{display:flex;gap:6px}
.ai-key-row .inp{flex:1;min-width:0}
.ai-set .field span{font-size:12px;color:var(--muted);line-height:1.4}
.ai-set a{color:var(--accent)}

/* install */
.install{display:flex;align-items:center;gap:8px;margin:0 6px;padding:9px 12px;border-radius:8px;border:1px solid var(--accent);background:var(--surface);color:var(--accent);font-weight:600;cursor:pointer}
.install:hover{background:var(--accent-soft)}
.install-mini{display:none;border:0;background:var(--accent);color:var(--accent-ink);font-weight:600;font-size:13px;padding:6px 12px;border-radius:99px;cursor:pointer;flex:none}
.out-acts{display:flex;gap:6px;flex-wrap:wrap}
.t{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.t-field{max-width:520px}
.t-btn{border:0;background:var(--accent);color:var(--accent-ink);font-weight:600;padding:4px 10px;border-radius:6px;cursor:pointer;margin-left:auto}
/* sheet */
.sheet{position:fixed;inset:0;background:rgba(10,14,20,.45);display:flex;align-items:center;justify-content:center;z-index:45;padding:16px}
.sheet-card{background:var(--surface);border-radius:16px;padding:20px;width:min(460px,100%);max-height:calc(100% - 32px);overflow-y:auto;display:flex;flex-direction:column;gap:14px;box-shadow:var(--shadow)}
.sheet-card h2{margin:0;font-size:17px;text-wrap:balance}
.sheet-card > .ghost{align-self:flex-end}
.sheet-grid{display:flex;flex-direction:column;gap:6px}
.sheet-opt{display:flex;gap:12px;align-items:flex-start;text-align:left;border:1px solid var(--line);background:var(--bg);border-radius:10px;padding:10px 12px;cursor:pointer}
.sheet-opt:hover{border-color:var(--accent);background:var(--accent-soft)}
.sheet-opt svg{flex:none;color:var(--accent);margin-top:2px}
.sheet-opt span{display:flex;flex-direction:column;gap:2px}
.sheet-opt small{color:var(--muted);font-size:12px;line-height:1.4}
.ios-steps{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:8px;line-height:1.45}

@media (max-width: 980px){
  .ws{grid-template-columns:minmax(0,1fr)}
  .side{position:static}
}
@media (max-width: 760px){
  .app{grid-template-columns:minmax(0,1fr);grid-template-rows:auto minmax(0,1fr)}
  .rail{border-right:0;border-bottom:1px solid var(--line);padding:12px 16px;gap:10px}
  .offline,.rail-foot{display:none}
  .nav{flex-direction:row;overflow-x:auto;gap:4px;margin:0 -16px;padding:0 16px 2px}
  .nav-group{flex-direction:row;gap:4px}
  .nav-label{display:none}
  .nav button{white-space:nowrap;width:auto;padding:7px 10px;background:var(--sunk)}
  main{padding-block:18px 32px;padding-inline:16px}
  .head h1{font-size:22px}
  .pages{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:8px}
  .drop{padding:28px 16px}
  .install{display:none!important}
  .install-mini:not([hidden]){display:block}
  /* phone order: result, picker, options, pages, sticky action */
  .ws{display:flex;flex-direction:column;gap:12px;align-items:stretch}
  .col-main,.side{display:contents}
  .result{order:1}.drop{order:2}.opt-panel{order:3}.col-area{order:4}
  .ws:has(.ed-stage) .opt-panel{order:5}
  .ed-bar{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin-inline:-16px;border-radius:0;border-width:1px 0}
  .ed-group{flex-wrap:nowrap;flex:none}
  .ed-hist{margin-left:0}
  .ed-tool{min-width:52px;font-size:11px;flex:none}
  .ed-group + .ed-group{border-left:0;padding-left:0}
  .ed-stage{margin-inline:-16px;border-radius:0;padding:8px;height:calc(100dvh - 190px);min-height:320px}
  .ed-zoom{margin-left:0}
  .action{order:5;position:sticky;bottom:0;z-index:5;margin-inline:-16px;border-radius:14px 14px 0 0;border-width:1px 0 0;padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));box-shadow:0 -4px 16px rgba(0,0,0,.08);flex-direction:row;flex-wrap:wrap;align-items:center;gap:6px 12px}
  .action .sum{flex:1;min-width:0}
  .action .run{padding:10px 18px}
  .action .help{flex-basis:100%}
  main{padding-bottom:0}
  .grid-tools .ghost{padding:6px 8px}
  .out{gap:8px}
}