:root{
  --bg:#f3f5f7;--card:#fff;--text:#1b2733;--muted:#6b7a89;--line:#e3e8ee;
  --brand:#0f766e;--brand-d:#0b5a54;--in:#15803d;--out:#b91c1c;--warn:#b45309;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#10161c;--card:#18212a;--text:#e8eef3;--muted:#8fa0b0;--line:#26323d;--brand:#14b8a6;--brand-d:#0f9488;--in:#4ade80;--out:#f87171}
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--text);font:16px/1.4 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif}
.hidden{display:none!important}
.muted{color:var(--muted)}
.error{color:var(--out);min-height:1.2em;margin:.5rem 0 0}

/* вход */
.login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}
.login-card{width:100%;max-width:340px;text-align:center}
.login-card h1{margin:.2rem 0}
.logo{font-size:48px}

/* каркас */
.topbar{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;
  padding:calc(10px + env(safe-area-inset-top)) 16px 10px;background:var(--brand);color:#fff;font-weight:600;font-size:18px}
.view{max-width:760px;margin:0 auto;padding:12px 12px calc(96px + env(safe-area-inset-bottom))}
.tabs{position:fixed;left:0;right:0;bottom:0;z-index:5;display:flex;background:var(--card);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom)}
.tabs button{flex:1;background:none;border:0;padding:8px 0 6px;font-size:20px;color:var(--muted);display:flex;flex-direction:column;align-items:center;gap:2px;cursor:pointer}
.tabs button span{font-size:11px}
.tabs button.active{color:var(--brand);font-weight:600}

/* элементы */
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:12px}
input,select,textarea{width:100%;font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:11px 12px;margin:4px 0 10px}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:-1px}
label{font-size:13px;color:var(--muted)}
.btn{font:inherit;border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:10px;padding:11px 16px;cursor:pointer}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.btn.primary:active{background:var(--brand-d)}
.btn.danger{color:var(--out)}
.btn.block{width:100%}
.link{background:none;border:0;color:inherit;font:inherit;cursor:pointer;opacity:.9}
.row{display:flex;gap:8px;align-items:center}
.row>*{flex:1}
.row>.fix{flex:0 0 auto}
.bar{display:flex;gap:8px;margin-bottom:12px;flex-wrap:wrap}
.bar .btn{flex:1}

/* списки */
.item{display:flex;justify-content:space-between;gap:10px;padding:12px 14px;background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:8px;cursor:pointer}
.item .l{min-width:0}
.item .t{font-weight:600;overflow:hidden;text-overflow:ellipsis}
.item .s{font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item .r{font-weight:700;white-space:nowrap}
.pos{color:var(--in)}.neg{color:var(--out)}
.day-title{font-size:13px;color:var(--muted);margin:14px 4px 6px;text-transform:uppercase;letter-spacing:.03em}
.empty{text-align:center;color:var(--muted);padding:32px 8px}

/* итоги */
.kpis{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:12px}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px}
.kpi small{color:var(--muted)}
.kpi b{display:block;font-size:20px;margin-top:2px}
.kpi.wide{grid-column:span 2}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:8px 6px;border-bottom:1px solid var(--line);text-align:right}
th:first-child,td:first-child{text-align:left}
th{color:var(--muted);font-weight:600;font-size:12px}

/* позиции чека */
.lines .ln{display:grid;grid-template-columns:1fr 62px 90px 34px;gap:6px;align-items:start}
.lines .ln input{margin:0 0 6px}
.lines .ln button{height:44px}
.total{display:flex;justify-content:space-between;font-size:18px;font-weight:700;margin:6px 0 12px}

/* модальное окно */
.modal{position:fixed;inset:0;z-index:20;background:rgba(0,0,0,.45);display:flex;align-items:flex-end;justify-content:center}
.sheet{width:100%;max-width:560px;max-height:92vh;overflow:auto;background:var(--card);border-radius:18px 18px 0 0;padding:14px 14px calc(18px + env(safe-area-inset-bottom))}
.sheet-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;font-size:17px}
@media (min-width:640px){.modal{align-items:center}.sheet{border-radius:18px}}

.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%);z-index:30;background:#1b2733;color:#fff;padding:10px 16px;border-radius:999px;font-size:14px}
datalist{display:none}

/* ---------- печать: только товарный чек ---------- */
#printArea{display:none}
@media print{
  body{background:#fff;color:#000}
  body>*:not(#printArea){display:none!important}
  #printArea{display:block!important;font:13px/1.35 "Times New Roman",serif;color:#000;padding:0}
  @page{size:A4;margin:14mm}
}
.receipt h2{text-align:center;margin:0 0 4px;font-size:18px}
.receipt .head{text-align:center;margin-bottom:10px}
.receipt table{margin:8px 0;font-size:13px}
.receipt th,.receipt td{border:1px solid #000;padding:4px 6px;text-align:left;color:#000}
.receipt th:nth-child(n+3),.receipt td:nth-child(n+3){text-align:right}
.receipt .sum{margin:6px 0;font-weight:700}
.receipt .sign{display:flex;justify-content:space-between;margin-top:26px}
.receipt .sign div{width:46%;border-top:1px solid #000;padding-top:2px;font-size:11px}
.receipt .cut{border-top:1px dashed #000;margin:18px 0;text-align:center;font-size:10px;color:#444}