:root{
  --bg:#0b0b0d;
  --panel:#141417;
  --panel-2:#1b1b20;
  --line:#2a2a31;
  --text:#f2f2f4;
  --muted:#9a9aa5;
  --accent:#12c9a0;
  --accent-dim:#0e8f74;
  --danger:#ff5a5a;
  --radius:14px;
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font:15px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Arial,sans-serif;
  display:flex;flex-direction:column;
  overflow:hidden;
}

/* ---------- top bar ---------- */
.topbar{
  flex:0 0 auto;display:flex;align-items:center;gap:8px;
  padding:10px 12px;background:var(--bg);
  border-bottom:1px solid var(--line);
}
.topbar-title{flex:1;text-align:center;font-weight:600;letter-spacing:.2px}
.topbar-right{display:flex;gap:2px}
.icon-btn{
  background:none;border:0;color:var(--text);font-size:17px;
  width:36px;height:36px;border-radius:10px;cursor:pointer;
}
.icon-btn:hover{background:var(--panel-2)}

/* ---------- stage ---------- */
#stage{flex:1 1 auto;position:relative;overflow:hidden}
.view{position:absolute;inset:0;display:none;flex-direction:column}
.view.active{display:flex}

/* ---------- capture hero ---------- */
.hero{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;padding:16px 22px 8px;text-align:center;
}
.hero-art{position:relative;width:min(340px,80vw);height:210px;flex:0 0 auto}
.paper{
  position:absolute;inset:26px 8px 0 0;background:#e9e6df;border-radius:8px;
  transform:rotate(-7deg);opacity:.24;padding:16px;overflow:hidden;
}
.paper-line{height:6px;background:#6b6b6b;margin-bottom:9px;border-radius:3px}
.w70{width:70%}.w90{width:90%}.w80{width:80%}.w60{width:60%}
.sig-swash{
  position:absolute;right:14px;bottom:26px;width:84px;height:36px;
  border-bottom:2px solid #4b4b4b;border-radius:0 0 60% 0;transform:rotate(-6deg);
}
.phone{
  position:absolute;right:26px;top:0;width:112px;height:196px;
  background:#000;border-radius:20px;border:3px solid #2c2c33;
  box-shadow:0 18px 40px rgba(0,0,0,.55);
}
.phone-screen{
  position:absolute;inset:5px;background:#fff;border-radius:15px;overflow:hidden;
  display:flex;align-items:center;justify-content:center;padding:6px;
}
.doc-mini{width:100%;color:#111}
.doc-title{font-size:6px;font-weight:700;text-align:center;line-height:1.25;margin-bottom:5px}
.doc-body{height:3px;background:#d6d6d6;margin-bottom:2px;border-radius:2px}
.doc-body.short{width:70%}
.mini-sig-row{display:flex;justify-content:space-between;margin-top:10px;padding:0 3px}
.mini-sig{width:26px;height:14px;border-bottom:1px solid #999;border-radius:0 0 70% 0}
.mini-sig-box{width:26px;height:14px;border:1px dashed var(--accent)}

#heroTitle{margin:0;font-size:26px;font-weight:700}
#heroSub{margin:0;color:var(--muted);max-width:330px;font-size:14px}

.primary-btn{
  width:min(430px,90vw);margin-top:6px;padding:17px;border:0;border-radius:999px;
  background:var(--accent);color:#03221c;font-size:17px;font-weight:700;letter-spacing:.2px;
  cursor:pointer;
}
.primary-btn:active{background:var(--accent-dim)}

/* ---------- document workspace ---------- */
.toolstrip{
  flex:0 0 auto;display:flex;gap:8px;padding:8px 12px;overflow-x:auto;
  border-bottom:1px solid var(--line);
}
.tool{
  flex:0 0 auto;background:var(--panel-2);border:1px solid var(--line);color:var(--text);
  padding:7px 12px;border-radius:999px;font-size:13px;cursor:pointer;white-space:nowrap;
}
.tool.active{border-color:var(--accent);color:var(--accent)}

.pad{
  flex:1;position:relative;display:flex;align-items:center;justify-content:center;
  overflow:hidden;padding:10px;min-height:0;
}
#canvas{max-width:100%;max-height:100%;display:block;border-radius:6px;box-shadow:0 8px 26px rgba(0,0,0,.5)}

.empty-hint{
  position:absolute;text-align:center;color:var(--muted);pointer-events:none;
}
.empty-hint .small{font-size:13px;max-width:260px}
.hidden{display:none !important}

/* crop overlay */
.crop-layer{position:absolute;inset:0;pointer-events:none}
.crop-layer svg{width:100%;height:100%;position:absolute;inset:0}
#cropPoly{fill:rgba(18,201,160,.14);stroke:var(--accent);stroke-width:.5;vector-effect:non-scaling-stroke}
.handle{
  position:absolute;width:22px;height:22px;margin:-11px 0 0 -11px;border-radius:50%;
  background:rgba(18,201,160,.22);border:2px solid var(--accent);
  pointer-events:auto;cursor:grab;touch-action:none;
}

/* signature overlay */
.sig-layer{position:absolute;inset:0;pointer-events:none}
.sig-item{
  position:absolute;pointer-events:auto;cursor:move;touch-action:none;
  border:1px dashed rgba(18,201,160,.7);border-radius:4px;
}
.sig-item canvas{display:block;width:100%;height:100%}
.sig-item .sig-del{
  position:absolute;top:-11px;right:-11px;width:22px;height:22px;border-radius:50%;
  background:#000;color:#fff;border:1px solid var(--line);font-size:12px;line-height:1;
  cursor:pointer;
}
.sig-item .sig-resize{
  position:absolute;right:-9px;bottom:-9px;width:18px;height:18px;border-radius:3px;
  background:var(--accent);cursor:nwse-resize;touch-action:none;
}

.pager{
  flex:0 0 auto;display:flex;gap:8px;padding:6px 12px 10px;overflow-x:auto;
}
.pager:empty{display:none}
.pager .thumb{
  flex:0 0 auto;width:52px;height:68px;border:1px solid var(--line);border-radius:6px;
  overflow:hidden;background:#000;cursor:pointer;position:relative;
}
.pager .thumb.active{border-color:var(--accent)}
.pager .thumb img{width:100%;height:100%;object-fit:cover}

/* ---------- text pane ---------- */
.pane-head{
  flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;
  padding:12px;border-bottom:1px solid var(--line);font-weight:600;
}
.text-btn{
  background:var(--panel-2);border:1px solid var(--line);color:var(--text);
  padding:7px 12px;border-radius:9px;font-size:13px;cursor:pointer;margin-left:6px;
}
#textOut{
  flex:1;width:100%;background:transparent;border:0;color:var(--text);
  padding:14px;font:14px/1.6 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  resize:none;outline:none;
}

/* ---------- export ---------- */
.export-grid{
  padding:12px;display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;
  overflow:auto;
}
.card-btn{
  background:var(--panel);border:1px solid var(--line);color:var(--text);
  padding:18px 12px;border-radius:var(--radius);font-size:14px;cursor:pointer;
}
.card-btn:hover{border-color:var(--accent)}
.hint{color:var(--muted);font-size:13px;padding:0 14px}

/* ---------- tab bar ---------- */
.tabbar{
  flex:0 0 auto;display:flex;background:var(--bg);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom,0);
  overflow-x:auto;scrollbar-width:none;
}
.tabbar::-webkit-scrollbar{display:none}
.tab{
  flex:1 0 auto;min-width:78px;background:none;border:0;color:var(--muted);padding:12px 10px 11px;
  font-size:12.5px;font-weight:600;cursor:pointer;position:relative;white-space:nowrap;
}
.tab.active{color:var(--accent)}
.tab.active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  bottom:5px;width:26px;height:3px;border-radius:3px;background:var(--accent);
}

/* ---------- bottom sheet ---------- */
.sheet{position:fixed;inset:0;background:rgba(0,0,0,.6);display:none;z-index:40;align-items:flex-end}
.sheet.open{display:flex}
.sheet-inner{
  width:100%;background:var(--panel);border-radius:18px 18px 0 0;padding:16px 14px 22px;
  max-height:82vh;overflow:auto;
}
.sheet h3{margin:0 0 10px;font-size:16px}
.sheet .row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.chip{
  background:var(--panel-2);border:1px solid var(--line);color:var(--text);
  padding:9px 14px;border-radius:999px;font-size:13px;cursor:pointer;
}
.chip.active{border-color:var(--accent);color:var(--accent)}
.sheet .sheet-actions{display:flex;gap:10px;margin-top:14px}
.sheet .sheet-actions button{flex:1;padding:14px;border-radius:12px;border:0;font-size:15px;font-weight:600;cursor:pointer}
.sheet .cancel{background:var(--panel-2);color:var(--text)}
.sheet .go{background:var(--accent);color:#03221c}

/* signature pad */
.sig-pad{
  width:100%;height:170px;background:#fff;border-radius:12px;touch-action:none;display:block;
}

/* camera */
#camWrap{position:relative;background:#000;border-radius:12px;overflow:hidden}
#cam{width:100%;display:block;max-height:56vh;object-fit:contain}

/* toast */
.toast{
  position:fixed;left:50%;bottom:82px;transform:translateX(-50%) translateY(10px);
  background:#22222a;color:#fff;padding:10px 16px;border-radius:999px;font-size:13.5px;
  opacity:0;pointer-events:none;transition:.2s;z-index:60;max-width:90vw;text-align:center;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

.spin{
  display:inline-block;width:14px;height:14px;border:2px solid rgba(255,255,255,.25);
  border-top-color:var(--accent);border-radius:50%;animation:sp .8s linear infinite;
  vertical-align:-2px;margin-right:7px;
}
@keyframes sp{to{transform:rotate(360deg)}}

@media print{
  body{background:#fff}
  .topbar,.tabbar,.toolstrip,.pager,.sheet,.toast{display:none !important}
  #stage,.view.active{position:static;display:block}
  #canvas{max-width:none;box-shadow:none}
}