:root{
  --ink:#1d1d1f;--mute:#6e6e73;--faint:#a1a1a6;--line:#e5e5e7;--soft:#f5f5f7;--bar:#fbfbfb;
  --canvas:#ececee;--red:#ff3b30;--sel:#0a84ff;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI Variable Text","Segoe UI","SF Pro Text",Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;overflow:hidden;color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased;font-size:13px}
button{font:inherit;color:inherit}
svg{display:block}
.hidden{display:none!important}
#app{height:100%;display:flex;flex-direction:column}

/* toolbar */
#toolbar{height:52px;flex:none;display:flex;align-items:center;gap:6px;padding:0 12px;background:var(--bar);border-bottom:1px solid var(--line)}
.grp{display:flex;align-items:center;gap:2px}
.sep{width:1px;height:22px;background:var(--line);margin:0 6px}
.sp{flex:1}
.tb{width:34px;height:34px;border:none;background:none;border-radius:9px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#3a3a3c}
.tb svg{width:18px;height:18px}
.tb:hover{background:#ececee}
.tb.on{background:var(--ink);color:#fff}
.tb:disabled{opacity:.3;cursor:default;background:none}
.tb.sm{width:28px;height:28px}
.tb.sm svg{width:15px;height:15px}
.tb.wide{width:auto;padding:0 12px;font-weight:600;gap:6px}
.pill{border:none;background:var(--ink);color:#fff;font-weight:600;font-size:13px;padding:8px 16px;border-radius:999px;cursor:pointer;white-space:nowrap}
.pill:hover{background:#000}
.pill.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px #d2d2d7}
.pill.ghost:hover{background:#f0f0f2}
.pill.red{background:var(--red)}
.pill.big{font-size:15px;padding:12px 22px}
.pill:disabled{opacity:.4;cursor:default}
.search{background:#fff;border:1px solid var(--line);border-radius:10px;padding:0 4px 0 10px;height:32px;margin-right:6px}
.search .si svg{width:14px;height:14px;color:var(--faint)}
.search input{border:none;outline:none;font:inherit;width:150px;padding:0 6px;background:none}
#searchCount{color:var(--faint);font-size:12px;min-width:34px;text-align:right}
.zoom{margin-right:8px}
.zl{border:none;background:none;font-weight:600;width:52px;cursor:pointer;font-size:12px}

/* layout */
#body{flex:1;display:flex;min-height:0}
#side{width:168px;flex:none;background:#f7f7f8;border-right:1px solid var(--line);display:flex;flex-direction:column}
#thumbs{flex:1;overflow:auto;padding:16px 0 8px;display:flex;flex-direction:column;align-items:center;gap:14px}
.th{position:relative;display:flex;flex-direction:column;align-items:center;gap:6px;cursor:pointer}
.th .tc{background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.14);border-radius:2px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.th canvas{display:block}
.th .tn{font-size:11px;color:var(--mute);font-weight:500}
.th.cur .tc{outline:2.5px solid var(--ink);outline-offset:3px}
.th.sel .tc{outline:2.5px solid var(--sel);outline-offset:3px}
.th.cur.sel .tc{outline-color:var(--sel)}
.th .tact{position:absolute;top:4px;right:4px;display:none;gap:3px}
.th:hover .tact{display:flex}
.th .tact button{width:24px;height:24px;border:none;border-radius:7px;background:rgba(29,29,31,.85);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer}
.th .tact button svg{width:13px;height:13px}
.th.dragover::before{content:"";position:absolute;left:-10px;right:-10px;top:-9px;height:3px;border-radius:2px;background:var(--sel)}
.th.dragover-after::after{content:"";position:absolute;left:-10px;right:-10px;bottom:-9px;height:3px;border-radius:2px;background:var(--sel)}
.sidebtns{display:flex;gap:6px;padding:10px;border-top:1px solid var(--line)}
.sbtn{flex:1;border:none;background:#fff;box-shadow:inset 0 0 0 1px var(--line);border-radius:9px;padding:7px 4px;font-size:11.5px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:4px}
.sbtn svg{width:12px;height:12px}
.sbtn:hover{background:#f0f0f2}

#viewer{flex:1;position:relative;background:var(--canvas);overflow:auto;min-width:0}
#pages{display:flex;flex-direction:column;align-items:center;gap:22px;padding:28px 28px 80px;min-width:min-content}
.pg{position:relative;background:#fff;box-shadow:0 4px 18px rgba(0,0,0,.12);flex:none}
.pg canvas.main{position:absolute;inset:0;width:100%;height:100%}
.pg .textLayer{z-index:1}
.pg .annotationLayer{z-index:2}
.ov{position:absolute;left:0;top:0;transform-origin:0 0;z-index:3;pointer-events:none}
.edl{position:absolute;left:0;top:0;transform-origin:0 0;z-index:4;pointer-events:none}
body[data-tool="select"] .pg .textLayer{pointer-events:auto}
body:not([data-tool="select"]) .pg .textLayer,body:not([data-tool="select"]) .pg .annotationLayer{pointer-events:none}
body:not([data-tool="select"]):not([data-tool="edit"]) .ov{pointer-events:auto;cursor:crosshair}
body[data-tool="text"] .ov{cursor:text}
body[data-tool="edit"] .edl .et{pointer-events:auto}
body[data-tool="edit"] .obj.replace{cursor:text}
body[data-tool="edit"] .obj.replace:hover{outline:1px solid rgba(10,132,255,.6)}

/* objects */
.obj{position:absolute;pointer-events:auto;cursor:move}
.obj.text,.obj.replace{white-space:pre;line-height:1.2;padding:0 2px;outline:none}
.obj.replace{padding:0}
.obj.text[contenteditable="true"],.obj.replace[contenteditable="true"]{cursor:text;outline:1.5px dashed var(--sel);outline-offset:1px}
.obj.highlight{mix-blend-mode:multiply}
.obj.rect{border-style:solid}
.obj.redact{background:#000;opacity:.82;background-image:repeating-linear-gradient(45deg,transparent 0 6px,rgba(255,59,48,.35) 6px 8px)}
.obj img{width:100%;height:100%;display:block;pointer-events:none;user-select:none}
.obj svg{position:absolute;inset:0;overflow:visible;pointer-events:none}
.obj.selected{outline:1.5px solid var(--sel);outline-offset:2px}
.obj .hd{position:absolute;right:-7px;bottom:-7px;width:11px;height:11px;background:#fff;border:1.5px solid var(--sel);border-radius:3px;cursor:nwse-resize;display:none}
.obj.selected .hd{display:block}
.drawbox{position:absolute;border:1.5px dashed var(--sel);background:rgba(10,132,255,.06);pointer-events:none}

/* edit text layer */
.et{position:absolute;pointer-events:none;cursor:text;border-radius:2px;white-space:pre;color:transparent}
.et:hover{background:rgba(10,132,255,.10);outline:1px solid rgba(10,132,255,.6)}

/* search highlight */
.textLayer .hit{background:rgba(255,214,10,.55);border-radius:2px}
.textLayer .hit.cur{background:rgba(255,149,0,.7)}

/* props */
#props{width:236px;flex:none;border-left:1px solid var(--line);background:#fff;overflow:auto;padding:18px 18px 30px}
#props h4{margin:0 0 12px;font-size:13px;font-weight:700}
#props .row{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 0;border-bottom:1px solid #f2f2f4;color:var(--mute);font-size:12px}
#props .row b{color:var(--ink);font-weight:600}
#props select,#props input[type=number]{font:inherit;font-size:12px;border:1px solid var(--line);border-radius:7px;padding:4px 6px;background:#fff;max-width:120px}
#props input[type=number]{width:64px}
#props input[type=range]{width:110px;accent-color:var(--ink)}
.sw{display:flex;gap:5px}
.sw i{width:18px;height:18px;border-radius:50%;cursor:pointer;box-shadow:inset 0 0 0 1px rgba(0,0,0,.15)}
.sw i.on{outline:2px solid var(--ink);outline-offset:2px}
.tg{display:flex;gap:4px}
.tg button{border:1px solid var(--line);background:#fff;border-radius:7px;padding:3px 9px;font-size:12px;cursor:pointer}
.tg button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
#props .hint{color:var(--mute);font-size:12px;line-height:1.5;margin-top:14px}
#props .pbtns{display:flex;flex-direction:column;gap:8px;margin-top:16px}
#props .pbtns .pill{width:100%}
.sigs{display:flex;flex-direction:column;gap:8px;margin-top:6px}
.sigs .sg{position:relative;border:1px solid var(--line);border-radius:10px;padding:8px;cursor:pointer;background:#fff;display:flex;align-items:center;justify-content:center;height:62px}
.sigs .sg img{max-width:100%;max-height:46px}
.sigs .sg.on{border-color:var(--ink);box-shadow:0 0 0 1px var(--ink)}
.sigs .sg .x{position:absolute;top:4px;right:6px;border:none;background:none;color:var(--faint);cursor:pointer;font-size:14px}

/* empty */
#empty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:var(--canvas)}
.emptyin{text-align:center;max-width:460px;padding:20px}
.emptyin .logo{width:72px;height:72px;border-radius:20px;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;margin:0 auto 22px}
.emptyin .logo svg{width:34px;height:34px}
.emptyin h1{font-size:34px;font-weight:700;letter-spacing:-.02em;margin:0}
.emptyin p{color:var(--mute);font-size:15px;line-height:1.45;margin:10px 0 0}
.emptyin .ebtns{display:flex;gap:10px;justify-content:center;margin-top:24px}
.emptyin .tiny{font-size:12px;color:var(--faint);margin-top:20px}
#dropHint{position:absolute;inset:14px;border:2px dashed var(--ink);border-radius:18px;display:none;align-items:center;justify-content:center;font-size:20px;font-weight:700;background:rgba(255,255,255,.7);z-index:20}
body.dragging #dropHint{display:flex}
body.nodoc #side,body.nodoc #props{visibility:hidden}

/* menu */
.menu{position:fixed;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(20px);border-radius:12px;box-shadow:0 12px 40px rgba(0,0,0,.18),0 0 0 1px rgba(0,0,0,.06);padding:6px;min-width:240px}
.menu button{display:flex;align-items:center;gap:10px;width:100%;border:none;background:none;text-align:left;padding:8px 10px;border-radius:7px;cursor:pointer;font-size:13px}
.menu button svg{width:16px;height:16px;color:#3a3a3c}
.menu button:hover{background:var(--ink);color:#fff}
.menu button:hover svg{color:#fff}
.menu hr{border:none;border-top:1px solid var(--line);margin:5px 4px}

/* modal */
#modalBg{position:fixed;inset:0;background:rgba(0,0,0,.28);z-index:60;display:flex;align-items:center;justify-content:center}
#modal{background:#fff;border-radius:18px;box-shadow:0 30px 80px rgba(0,0,0,.3);width:min(520px,92vw);max-height:90vh;overflow:auto;padding:24px}
#modal h3{margin:0 0 6px;font-size:19px;font-weight:700}
#modal p{margin:0 0 14px;color:var(--mute);line-height:1.5}
#modal .mb{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}
#modal label{display:block;font-size:12px;font-weight:600;color:var(--mute);margin:12px 0 6px}
#modal input[type=text],#modal select{width:100%;font:inherit;font-size:14px;border:1px solid #d2d2d7;border-radius:9px;padding:9px 11px;outline:none}
#modal input[type=text]:focus{border-color:var(--ink)}
#modal .opt{display:flex;align-items:flex-start;gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:11px;margin-top:8px;cursor:pointer}
#modal .opt input{margin-top:3px;accent-color:var(--ink)}
#modal .opt b{display:block;font-size:14px}
#modal .opt span{color:var(--mute);font-size:12px}
#modal .checks{display:flex;flex-wrap:wrap;gap:8px}
#modal .checks label{display:flex;align-items:center;gap:6px;margin:0;font-size:13px;color:var(--ink);font-weight:500;border:1px solid var(--line);border-radius:9px;padding:7px 10px;cursor:pointer}
.sigpad{border:1px solid #d2d2d7;border-radius:12px;background:#fff;width:100%;height:180px;touch-action:none;cursor:crosshair;display:block}
.tabs{display:flex;gap:4px;background:var(--soft);border-radius:10px;padding:3px;margin:12px 0}
.tabs button{flex:1;border:none;background:none;padding:7px;border-radius:8px;font-weight:600;cursor:pointer}
.tabs button.on{background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.12)}

/* progress & toast */
#progress{position:fixed;inset:0;background:rgba(255,255,255,.6);backdrop-filter:blur(4px);z-index:70;display:flex;align-items:center;justify-content:center}
.pbox{background:#fff;border-radius:16px;padding:22px 26px;box-shadow:0 20px 60px rgba(0,0,0,.2);width:340px}
#ptext{font-weight:600;margin-bottom:12px}
.pbar{height:6px;background:#ececee;border-radius:3px;overflow:hidden}
.pbar i{display:block;height:100%;width:0;background:var(--ink);transition:width .2s}
#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:11px 18px;border-radius:12px;font-weight:500;opacity:0;pointer-events:none;transition:.25s;z-index:80;max-width:80vw}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media (max-width:1100px){#props{width:200px}.search input{width:90px}}