:root{
  --paper:#f4f2ec;
  --ink:#151515;
  --charcoal:#2b2b2b;
  --mid:#77736c;
  --line:#d5d1c9;
  --soft:#fffefa;
  --gray-1:#f0efeb;
  --gray-2:#e4e2dc;
  --gray-3:#c5c2bb;
}
*{box-sizing:border-box}
html{background:var(--paper)}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
}
button,input,select{font:inherit}
button{touch-action:manipulation}
.shell{
  max-width:680px;margin:0 auto;min-height:100vh;
  padding:calc(22px + env(safe-area-inset-top)) 18px calc(42px + env(safe-area-inset-bottom));
}
.brand{display:flex;align-items:center;gap:12px;margin:2px 0 24px}
.brand-mark{font-size:34px;color:var(--ink);line-height:1}
.brand-name{font-weight:800;font-size:24px;letter-spacing:-.7px}
.brand-sub{font-size:11px;letter-spacing:2.5px}
.card{
  background:var(--soft);border:1px solid var(--line);border-radius:18px;
  padding:18px;margin:14px 0;box-shadow:0 4px 16px rgba(0,0,0,.035)
}
.hidden{display:none!important}
h1,h2,h3{margin:0 0 8px}
h2{font-size:28px;letter-spacing:-.6px}
h3{font-size:20px}
.muted{color:var(--mid)}
.eyebrow{text-transform:uppercase;font-size:11px;letter-spacing:1.3px;color:#6b6862;margin-bottom:6px}
.big-input,.qty-input,input,.select{
  width:100%;border:1px solid var(--line);border-radius:12px;background:#fff;
  color:var(--ink);padding:13px 14px;outline:none
}
.big-input{font-size:22px;margin:10px 0}
.qty-input{font-size:34px;font-weight:760;text-align:center;padding:12px}
.select{font-weight:700;min-width:180px}
.btn{
  border:0;border-radius:12px;padding:13px 16px;font-weight:750;cursor:pointer;
  transition:opacity .15s ease, transform .05s ease
}
.btn:active{transform:scale(.99)}
.btn:disabled{opacity:.45;cursor:default}
.btn-dark{background:var(--ink);color:#fff}
.btn-light{background:var(--gray-2);color:var(--ink)}
.btn-outline{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn-ghost{background:transparent;color:var(--ink);padding:10px 4px}
.btn-full{width:100%}
.top-row{display:flex;justify-content:space-between;align-items:end;gap:12px}
.warehouse-block{min-width:190px}
.banner{
  border-radius:12px;padding:11px 13px;font-weight:750;font-size:13px;
  background:var(--gray-2);color:var(--ink);margin:14px 0;border:1px solid var(--line)
}
.banner.live{background:var(--charcoal);color:#fff;border-color:var(--charcoal)}
.scan-card{text-align:center}
.scan-button{
  width:100%;min-height:98px;background:var(--ink);color:#fff;
  font-size:20px;display:flex;align-items:center;justify-content:center;gap:12px
}
.scan-icon{font-size:32px}
.or{font-size:12px;color:#777;margin:14px 0 9px}
.manual-row{display:grid;grid-template-columns:1fr auto;gap:8px}
.reader{margin-top:14px;overflow:hidden;border-radius:12px}
.product-meta{display:flex;gap:12px;flex-wrap:wrap;color:#706c65;font-size:14px;margin-bottom:18px}
.duplicate-notice{
  background:var(--gray-1);border:1px solid var(--line);border-radius:12px;
  padding:11px 12px;margin:0 0 16px;font-size:14px;line-height:1.35
}
.stock-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:end}
.stock-number{font-size:44px;font-weight:800;line-height:1}
.difference{
  margin:16px 0 12px;padding:11px 13px;border-radius:10px;
  font-weight:800;text-align:center;border:1px solid var(--line)
}
.difference.neutral{background:var(--gray-1);color:#595650}
.difference.plus,.difference.minus{background:#dedcd6;color:var(--ink)}
.validate{font-size:18px;padding:15px}
.error{color:#111;font-size:14px;margin-top:10px;min-height:2px;font-weight:650}
.session-card{padding-bottom:15px}
.session-head{display:flex;justify-content:space-between;align-items:start;gap:12px}
.session-mode{font-size:11px;color:var(--mid);padding-top:3px;text-align:right}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:14px 0 16px}
.stat{
  border:1px solid var(--line);background:var(--gray-1);border-radius:12px;
  padding:10px 8px;text-align:center
}
.stat-value{display:block;font-size:24px;font-weight:820;line-height:1.1}
.stat-label{display:block;font-size:10px;text-transform:uppercase;letter-spacing:.6px;color:#6b6862;margin-top:5px}
.history{border-top:1px solid var(--line)}
.history-item{
  display:grid;grid-template-columns:1fr auto;gap:8px;border-bottom:1px solid var(--line);padding:14px 0
}
.history-main{min-width:0}
.history-name{font-weight:780;font-size:17px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.history-detail,.history-diff{font-size:13px;color:#706c65;margin-top:2px}
.history-diff{color:var(--ink);font-weight:650}
.history-side{text-align:right;min-width:76px}
.history-qty{font-weight:820;font-size:22px}
.history-correct{padding:5px 0 0;background:transparent;border:0;text-decoration:underline;font-weight:650;font-size:12px;color:var(--ink)}
.session-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:15px}
.session-note{font-size:11px;line-height:1.35;color:#77736c;margin-top:10px}
.toast{
  position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom));
  transform:translateX(-50%);background:#161616;color:#fff;border-radius:12px;
  padding:12px 16px;max-width:90%;z-index:80;box-shadow:0 6px 20px rgba(0,0,0,.25)
}
.scanner-viewport{
  position:relative;width:100%;min-height:300px;background:#111;border-radius:12px;overflow:hidden
}
.scanner-viewport video,.scanner-viewport canvas{
  position:absolute;inset:0;width:100%!important;height:100%!important;object-fit:cover
}
.scanner-viewport::after{
  content:"";position:absolute;left:8%;right:8%;top:34%;height:32%;
  border:3px solid rgba(255,255,255,.95);border-left-width:5px;border-right-width:5px;
  border-radius:8px;box-shadow:0 0 0 9999px rgba(0,0,0,.23);pointer-events:none;z-index:4
}
.scan-status{padding:10px 4px 0;font-size:13px;color:#6f6a63}
.modal-backdrop{
  position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:100;
  display:flex;align-items:center;justify-content:center;padding:20px
}
.modal{
  width:min(440px,100%);background:#fff;border-radius:18px;border:1px solid #aaa;
  padding:20px;box-shadow:0 14px 48px rgba(0,0,0,.28)
}
.modal-body{font-size:15px;line-height:1.45;color:#333;margin:12px 0 18px}
.modal-body .modal-product{font-weight:800;font-size:18px;color:#111;margin-bottom:8px}
.modal-body .modal-grid{display:grid;grid-template-columns:1fr auto;gap:7px 14px;margin-top:12px}
.modal-body .modal-grid strong{text-align:right}
.modal-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}
@media(max-width:430px){
  .shell{padding-left:14px;padding-right:14px}
  .stock-grid{grid-template-columns:1fr 1.2fr}
  h2{font-size:25px}
  .stats-grid{gap:6px}
  .stat{padding:9px 4px}
  .stat-value{font-size:22px}
  .session-actions{grid-template-columns:1fr}
}

.warehouse-lock-note{margin-top:7px;font-size:11px;color:#5f5c56;font-weight:650}
.select:disabled{opacity:1;color:var(--ink);-webkit-text-fill-color:var(--ink);background:var(--gray-1)}
.session-span{grid-column:1/-1}
.retry-note{margin-top:10px;padding:9px 11px;border:1px solid var(--line);border-radius:10px;background:var(--gray-1);font-size:12px;line-height:1.35;color:#55524d}
.final-summary{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:12px 0}
.final-summary .summary-box{border:1px solid var(--line);background:var(--gray-1);border-radius:10px;padding:10px}
.final-summary .summary-value{display:block;font-size:22px;font-weight:820}
.final-summary .summary-label{display:block;margin-top:3px;font-size:10px;text-transform:uppercase;letter-spacing:.6px;color:#69665f}