/* ===================== Design tokens ===================== */
*{box-sizing:border-box}
:root{
  --bg:#eef2f7; --card:#fff; --line:#e2e8f0; --line-2:#cbd5e1;
  --text:#0f172a; --muted:#64748b; --sidebar:#0f172a; --sidebar-2:#1e293b;
  --primary:#2563eb; --primary-d:#1d4ed8; --primary-soft:#eff6ff;
  --ok:#16a34a; --ok-soft:#dcfce7; --warn:#d97706; --warn-soft:#fef3c7;
  --danger:#dc2626; --danger-soft:#fee2e2; --radius:12px; --radius-sm:8px;
  --shadow:0 1px 2px rgba(15,23,42,.06),0 1px 3px rgba(15,23,42,.08);
  --shadow-lg:0 12px 32px rgba(15,23,42,.16);
}
html,body{margin:0;height:100%;font:14px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;color:var(--text);background:var(--bg);-webkit-tap-highlight-color:transparent}
.hidden{display:none!important}
.r{text-align:right}.c{text-align:center}
kbd{font:11px/1 ui-monospace,monospace;background:#eef2f7;border:1px solid var(--line-2);border-radius:5px;padding:2px 5px;color:var(--muted)}
a{color:var(--primary)}

/* ===================== App loading ===================== */
.app-loading{position:fixed;inset:0;background:var(--bg);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;z-index:999;color:var(--muted)}
.spinner{width:38px;height:38px;border:4px solid var(--line-2);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===================== Layout ===================== */
.sidebar{position:fixed;top:0;left:0;bottom:0;width:224px;background:var(--sidebar);color:#cbd5e1;display:flex;flex-direction:column;padding:14px 10px;z-index:60}
.brand{display:flex;align-items:center;gap:10px;padding:6px 8px 16px;color:#fff;font-weight:800;font-size:16px}
.brand-logo{font-size:22px}
.brand-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nav-list{display:flex;flex-direction:column;gap:3px;flex:1;overflow:auto}
.nav-item{display:flex;align-items:center;gap:10px;background:none;border:0;color:#cbd5e1;text-align:left;padding:10px 12px;border-radius:9px;cursor:pointer;font-size:14px;font-family:inherit;width:100%}
.nav-item:hover{background:var(--sidebar-2);color:#fff}
.nav-item.active{background:var(--primary);color:#fff;font-weight:600}
.nav-item kbd{margin-left:auto;background:rgba(255,255,255,.12);border-color:transparent;color:#cbd5e1}
.nav-icon{width:20px;text-align:center}
.sidebar-foot{border-top:1px solid #1e293b;padding-top:8px}
.version{color:#64748b;font-size:11px;text-align:center;padding:6px}
.mobile-topbar{display:none}
.nav-overlay{display:none}

main{margin-left:224px;padding:18px;min-height:100vh}
.view{display:none}
.view.active{display:block}
.view-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.view-head h1{font-size:20px;margin:0}
.view-head .sub{color:var(--muted);font-size:13px;margin-top:2px}
.spacer{flex:1}

/* ===================== Buttons & forms ===================== */
.btn{border:1px solid var(--line-2);background:#fff;padding:9px 14px;border-radius:var(--radius-sm);cursor:pointer;font-size:14px;color:var(--text);font-family:inherit;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.btn:hover{background:#f8fafc}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}
.btn.primary:hover{background:var(--primary-d)}
.btn.primary:disabled{background:#a9bde8;border-color:#a9bde8;cursor:not-allowed}
.btn.danger{color:var(--danger);border-color:#fca5a5}
.btn.danger:hover{background:var(--danger-soft)}
.btn.ok{color:var(--ok);border-color:#86efac}
.btn.ok:hover{background:var(--ok-soft)}
.btn.ghost{background:transparent;border-color:transparent}
.btn.sm{padding:5px 9px;font-size:12.5px}
.btn.big{padding:15px;font-size:17px;justify-content:center;width:100%}
.icon-btn{border:0;background:#fff;border-radius:8px;width:36px;height:36px;font-size:16px;cursor:pointer;box-shadow:var(--shadow)}
input,select,textarea{font-family:inherit;font-size:14px;color:var(--text);min-width:0}
.field{padding:9px 11px;border:1px solid var(--line-2);border-radius:var(--radius-sm);background:#fff;outline:none;width:100%}
.field:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
label.fld{display:block;margin-bottom:10px;font-size:12.5px;color:var(--muted);font-weight:600}
label.fld .field{margin-top:4px;font-weight:400;color:var(--text)}
.chk{display:inline-flex;align-items:center;gap:6px;color:var(--muted);cursor:pointer}
.input-group{display:flex;gap:6px;align-items:center;margin-top:4px}
.input-group .field{flex:1}
.thumb{width:32px;height:32px;object-fit:cover;border-radius:6px;vertical-align:middle;margin-right:8px;border:1px solid var(--line)}
.thumb-lg{display:block;max-width:120px;max-height:120px;margin-top:8px;border-radius:8px;border:1px solid var(--line)}

/* ===================== Toolbar ===================== */
.toolbar{display:flex;gap:8px;align-items:center;margin-bottom:12px;flex-wrap:wrap}
.toolbar .field{width:auto}
.toolbar .grow{flex:1;min-width:220px}
.tabs{display:flex;gap:4px;background:#e2e8f0;padding:4px;border-radius:10px;margin-bottom:14px;overflow:auto}
.tab{border:0;background:transparent;padding:8px 14px;border-radius:7px;cursor:pointer;font-size:13.5px;color:var(--muted);white-space:nowrap;font-family:inherit}
.tab.active{background:#fff;color:var(--text);font-weight:600;box-shadow:var(--shadow)}

/* ===================== Cards / stats ===================== */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:15px;box-shadow:var(--shadow)}
.card h3{margin:0 0 10px;font-size:14px}
.card.narrow{max-width:640px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin-bottom:14px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
.stat .k{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:5px}
.stat .v{font-size:20px;font-weight:800;margin-top:6px}
.stat.primary .v{color:var(--primary)}.stat.ok .v{color:var(--ok)}.stat.warn .v{color:var(--warn)}.stat.danger .v{color:var(--danger)}
.muted{color:var(--muted)}
.rowline{display:flex;justify-content:space-between;align-items:center;padding:5px 0}
.rowline.total{border-top:2px solid var(--line);margin-top:6px;padding-top:9px;font-size:20px;font-weight:800;color:var(--primary)}

/* ===================== Tables ===================== */
.tbl-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:auto;box-shadow:var(--shadow)}
table.grid{width:100%;border-collapse:collapse;min-width:560px}
.grid th{position:sticky;top:0;z-index:2;background:#f8fafc;text-align:left;font-size:11.5px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);padding:10px;border-bottom:1px solid var(--line);white-space:nowrap}
.grid td{padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:middle}
.grid tbody tr:hover td{background:#f8fafc}
.grid tbody tr:last-child td{border-bottom:0}
.grid code{background:#f1f5f9;padding:1px 5px;border-radius:4px;font-size:12.5px}
.grid .name{font-weight:600}
.grid .sub{color:var(--muted);font-size:12px;display:block}
.low{color:var(--danger);font-weight:700}
.badge{display:inline-block;padding:3px 9px;border-radius:99px;font-size:11.5px;font-weight:700;white-space:nowrap}
.badge.paid,.badge.received,.badge.completed{background:var(--ok-soft);color:#15803d}
.badge.pending,.badge.draft{background:var(--warn-soft);color:#b45309}
.badge.cancelled{background:var(--danger-soft);color:#b91c1c}
.badge.return{background:#e0e7ff;color:#4338ca}
.badge.sale{background:#e0f2fe;color:#0369a1}
.empty{padding:44px 20px;text-align:center;color:var(--muted)}
.chip{display:inline-flex;align-items:center;gap:5px;background:#f1f5f9;border-radius:99px;padding:4px 10px;font-size:12.5px}

/* ===================== POS ===================== */
#view-pos.active{display:block}
.pos{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:14px}
.pos-left{display:flex;flex-direction:column;min-width:0}
.pos-right{display:flex;flex-direction:column;gap:12px;align-content:start}
.scan-bar{display:flex;gap:8px;margin-bottom:10px}
#scan-input{flex:1;font-size:17px;padding:13px 15px;border:2px solid var(--primary);border-radius:11px;outline:none}
.suggest{position:relative;z-index:30}
.suggest .list{position:absolute;top:4px;left:0;right:0;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow-lg);max-height:340px;overflow:auto}
.suggest .item{padding:9px 12px;cursor:pointer;display:flex;justify-content:space-between;gap:10px;align-items:center}
.suggest .item:hover,.suggest .item.sel{background:var(--primary-soft)}
.suggest .item small{color:var(--muted);display:block}
.cart-wrap{flex:1;min-height:0;overflow:auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.cart{width:100%;border-collapse:collapse}
.cart th{position:sticky;top:0;background:#f8fafc;font-size:11.5px;text-transform:uppercase;color:var(--muted);padding:9px;border-bottom:1px solid var(--line);text-align:left}
.cart td{padding:7px 9px;border-bottom:1px solid var(--line)}
.cart .pname{font-weight:600}
.cart .pmeta{color:var(--muted);font-size:12px}
.cart input.pnum{width:84px;text-align:right;border:1px solid transparent;border-radius:6px;padding:5px;background:transparent;font-weight:600}
.cart input.pnum:focus{border-color:var(--line-2);background:#fff}
.cart input.dnum{width:70px;text-align:right;border:1px solid transparent;border-radius:6px;padding:5px;background:transparent}
.cart input.dnum:focus{border-color:var(--line-2);background:#fff}
.qty{display:inline-flex;align-items:center;border:1px solid var(--line-2);border-radius:8px;overflow:hidden}
.qty button{border:0;background:#f1f5f9;width:28px;height:30px;cursor:pointer;font-size:15px}
.qty input{width:48px;border:0;text-align:center;font-weight:700;height:30px}
.del{border:0;background:none;color:var(--danger);cursor:pointer;font-size:15px}
.unit-sel{border:1px solid var(--line-2);border-radius:7px;padding:4px 6px;font-size:12.5px;max-width:96px}
.pos-actions{margin-top:auto;display:flex;flex-direction:column;gap:10px}
.hint{font-size:12px;color:var(--muted)}
.seg{display:flex;border:1px solid var(--line-2);border-radius:9px;overflow:hidden}
.seg-btn{flex:1;border:0;background:#fff;padding:10px 6px;cursor:pointer;font-size:13px;font-family:inherit;white-space:nowrap}
.seg-btn.active{background:var(--primary);color:#fff;font-weight:600}
.quick{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0}
.quick button{border:1px solid var(--line-2);background:#fff;border-radius:7px;padding:5px 9px;cursor:pointer;font-size:12.5px}
.quick button:hover{background:var(--primary-soft);border-color:var(--primary)}
.promo-line{background:var(--ok-soft);color:#15803d;border-radius:7px;padding:5px 8px;font-size:12px;margin-top:4px}
.warn-line{background:var(--warn-soft);color:#b45309;border-radius:7px;padding:5px 8px;font-size:12px;margin-top:4px}

/* ===================== Receipt / label ===================== */
.receipt{font:12px/1.4 "Courier New",monospace;max-width:300px;margin:0 auto;color:#000}
.receipt h4{margin:0;text-align:center;font-size:15px;text-transform:uppercase}
.receipt .ct{text-align:center}
.receipt hr{border:0;border-top:1px dashed #000;margin:6px 0}
.receipt table{width:100%}
.receipt td{padding:1px 0;border:0;vertical-align:top}
.receipt .tot{font-size:14px;font-weight:700}
.receipt img{width:150px;display:block;margin:6px auto}
.label-sheet{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;padding:8px}
.label{border:1px dashed #94a3b8;padding:5px 7px;text-align:center;overflow:hidden;background:#fff}
.label .ln{font-size:10px;font-weight:700;line-height:1.15;max-height:24px;overflow:hidden}
.label .lp{font-size:11px;font-weight:800}
.label svg{display:block;margin:1px auto 0}
.qr-wrap{text-align:center}
.qr-wrap img{width:250px;height:250px;border:1px solid var(--line);border-radius:10px;background:#fff}
.qr-wrap .amt{font-size:26px;font-weight:800;color:var(--primary)}
.qr-wrap .info{color:var(--muted);font-size:13px;margin:4px 0}

/* ===================== Login / user ===================== */
.login-screen{position:fixed;inset:0;z-index:400;display:flex;align-items:center;justify-content:center;padding:16px;background:linear-gradient(135deg,#0f172a,#1e3a8a)}
.login-card{background:#fff;border-radius:16px;padding:26px;width:min(380px,94vw);box-shadow:0 24px 60px rgba(0,0,0,.4)}
.login-brand{font-size:22px;text-align:center;color:var(--sidebar);margin-bottom:4px}
.login-card p{margin:0 0 14px;text-align:center}
.login-error{color:var(--danger);min-height:18px;font-size:13px;margin:6px 0}
.sidebar-user{border-top:1px solid #1e293b;padding:8px 8px 10px;margin-bottom:4px}
.su-name{font-weight:700;color:#fff;font-size:13px}
.su-meta{font-size:11.5px;color:#94a3b8;margin-bottom:8px}
.sidebar-user .btn{width:100%;justify-content:center}

/* ===================== Charts (CSS bars) ===================== */
.bars{display:flex;flex-direction:column;gap:8px}
.bar-row{display:grid;grid-template-columns:120px 1fr 100px;gap:10px;align-items:center;font-size:13px}
.bar-track{background:#f1f5f9;border-radius:99px;height:12px;overflow:hidden}
.bar-fill{height:100%;background:linear-gradient(90deg,#2563eb,#60a5fa);border-radius:99px}
.bar-row .val{text-align:right;font-weight:700}
.cols{display:flex;align-items:flex-end;gap:4px;height:160px;padding-top:8px}
.col{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:4px;min-width:0}
.col .bar{width:100%;background:linear-gradient(180deg,#60a5fa,#2563eb);border-radius:4px 4px 0 0;min-height:2px}
.col .lbl{font-size:10px;color:var(--muted);white-space:nowrap}

/* ===================== Modal / toast ===================== */
.modal{position:fixed;inset:0;background:rgba(15,23,42,.55);display:flex;align-items:center;justify-content:center;z-index:200;padding:14px}
.modal-box{background:#fff;border-radius:16px;padding:20px;width:min(600px,96vw);max-height:92vh;overflow:auto;box-shadow:var(--shadow-lg)}
.modal-box.wide{width:min(980px,96vw)}
.modal-box h2{margin:0 0 16px;font-size:18px;display:flex;align-items:center;gap:8px}
.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:16px;flex-wrap:wrap}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
.form-grid .full{grid-column:1/-1}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#0f172a;color:#fff;padding:11px 20px;border-radius:10px;z-index:300;box-shadow:var(--shadow-lg);max-width:90vw}
.toast.err{background:var(--danger)}

/* ===================== Inventory sub-forms ===================== */
.line-items{width:100%;border-collapse:collapse;margin-top:8px}
.line-items th,.line-items td{border-bottom:1px solid var(--line);padding:6px 5px;text-align:left;font-size:13px}
.line-items input,.line-items select{width:100%;border:1px solid var(--line-2);border-radius:6px;padding:6px}
.line-items .sub{color:var(--muted);font-size:12px;display:block}
.scroll-x{overflow-x:auto}

/* ===================== Responsive ===================== */
@media (max-width:980px){
  .grid2,.grid3{grid-template-columns:1fr}
  .pos{grid-template-columns:1fr}
  .pos-right{position:static}
}
@media (max-width:820px){
  .sidebar{transform:translateX(-100%);transition:transform .22s ease;box-shadow:var(--shadow-lg);width:250px}
  body.menu-open .sidebar{transform:translateX(0)}
  body.menu-open .nav-overlay{display:block;position:fixed;inset:0;background:rgba(15,23,42,.5);z-index:55}
  main{margin-left:0;padding:12px;padding-top:62px}
  .mobile-topbar{display:flex;align-items:center;gap:10px;position:fixed;top:0;left:0;right:0;height:52px;background:#fff;border-bottom:1px solid var(--line);padding:0 12px;z-index:50}
  .mobile-topbar #mobile-title{font-weight:700;flex:1}
  .pos-actions{position:sticky;bottom:0}
  .form-grid{grid-template-columns:1fr}
  .cart table{min-width:520px}
  .cart-wrap{max-height:52vh}
  .bar-row{grid-template-columns:84px 1fr 84px}
  .scan-bar{flex-wrap:wrap}
  #scan-input{flex-basis:100%}
}

/* ===================== Print ===================== */
@media print{
  body>*{display:none!important}
  #print-area{display:block!important}
  #print-area .label-sheet{gap:4px}
}