:root{--bg:#f4f6f9;--card:#fff;--ink:#1d2733;--muted:#6b7785;--line:#e3e8ee;--brand:#0f6b5c;--brand-d:#0b5246;--accent:#e8f3f0;--danger:#b3261e;--warn:#fff4d6;--ok:#e6f4ea}
*{box-sizing:border-box}
body{margin:0;font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink)}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
.shell{display:flex;min-height:100vh}
.side{width:236px;background:#10332d;color:#d5e6e2;padding:16px 12px;flex-shrink:0;position:sticky;top:0;height:100vh;overflow:auto}
.side .brand{font-weight:700;font-size:17px;color:#fff;padding:4px 10px 2px}
.side .tenant{font-size:12.5px;color:#9cc2ba;padding:0 10px 14px;border-bottom:1px solid #1f4a42;margin-bottom:10px}
.side h4{margin:14px 10px 4px;font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:#79a69c}
.side a{display:block;color:#d5e6e2;padding:7px 10px;border-radius:6px}
.side a:hover{background:#1a4a41;text-decoration:none}.side a.on{background:#0f6b5c;color:#fff}
.main{flex:1;min-width:0}
.top{display:flex;justify-content:space-between;align-items:center;padding:12px 24px;background:#fff;border-bottom:1px solid var(--line)}
.top .who{color:var(--muted);font-size:13.5px}
.menu-btn{display:none}
.content{padding:22px 24px;max-width:1280px}
h1{font-size:22px;margin:0 0 16px}h2{font-size:17px;margin:22px 0 10px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px;margin-bottom:18px}
.grid{display:grid;gap:14px}.g4{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}.g2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.stat .k{color:var(--muted);font-size:13px}.stat .v{font-size:24px;font-weight:700;margin-top:2px}
.btn{display:inline-block;border:1px solid var(--brand);background:var(--brand);color:#fff;padding:7px 14px;border-radius:7px;cursor:pointer;font:inherit}
.btn:hover{background:var(--brand-d);text-decoration:none}
.btn.ghost{background:#fff;color:var(--brand)}.btn.ghost:hover{background:var(--accent)}
.btn.danger{background:#fff;color:var(--danger);border-color:#e3b5b2}.btn.sm{padding:3px 9px;font-size:13px}
.bar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:14px}.bar .sp{flex:1}
table{width:100%;border-collapse:collapse;background:#fff}
th,td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:#f0f4f7;font-weight:600;font-size:13px;color:#42505e}
td.n,th.n{text-align:right;white-space:nowrap}
.tw{overflow-x:auto;border:1px solid var(--line);border-radius:10px}.tw table{border:0}
label{display:block;font-weight:600;margin:12px 0 4px;font-size:14px}
input,select,textarea{width:100%;padding:8px 10px;border:1px solid #c9d2dc;border-radius:7px;font:inherit;background:#fff}
input[type=checkbox]{width:auto}input:focus,select:focus{outline:2px solid #9fd1c7;border-color:var(--brand)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}
.err{color:var(--danger);font-size:13px;margin-top:3px}
.flash{padding:10px 14px;border-radius:8px;margin-bottom:14px}.flash.ok{background:var(--ok)}.flash.bad{background:#fde7e6;color:var(--danger)}
.note{background:var(--warn);padding:10px 14px;border-radius:8px;font-size:14px;margin:10px 0}
.muted{color:var(--muted)}.tag{display:inline-block;background:var(--accent);color:var(--brand);padding:1px 8px;border-radius:99px;font-size:12.5px}
.center{min-height:100vh;display:grid;place-items:center;padding:20px}.center .card{width:100%;max-width:440px}
.pager{margin-top:12px}.pager nav>div:first-child{display:none}.pager svg{width:18px}
.pager nav{display:flex;gap:6px;justify-content:center;flex-wrap:wrap}.pager a,.pager span[aria-current]>span{padding:4px 10px;border:1px solid var(--line);border-radius:6px;background:#fff}
.lines td{padding:4px}.lines input,.lines select{padding:6px 8px}
/* Sổ kế toán */
.ledger{background:#fff;padding:26px 30px;border:1px solid var(--line);border-radius:10px}
.ledger .hd{display:flex;justify-content:space-between;gap:20px}
.ledger .ttl{text-align:center;font-weight:700;font-size:18px;margin:14px 0 4px}
.ledger .sub{text-align:center;margin-bottom:2px}
.ledger table th{background:#fff;text-align:center;border:1px solid #9aa5b1}
.ledger table td{border:1px solid #9aa5b1;padding:5px 8px}
.ledger tr.group td{font-weight:700;background:#f7f9fb}.ledger tr.total td{font-weight:700}.ledger tr.sum td{font-style:italic}
.ledger .cc th{font-weight:400;font-style:italic}
.ledger .sign{margin-top:22px;text-align:right}.ledger .sign div{display:inline-block;text-align:center}
@media(max-width:860px){
 .side{position:fixed;left:-250px;z-index:20;transition:left .2s}.side.open{left:0}
 .menu-btn{display:inline-block}.row2,.row3{grid-template-columns:1fr}.content{padding:16px}
}
@media print{
 .side,.top,.noprint,.flash{display:none!important}.content{padding:0;max-width:none}body{background:#fff}
 .ledger{border:0;padding:0}.ledger table{font-size:12px}
}

/* Biểu đồ tổng quan */
.chart-legend{display:flex;gap:18px;font-size:13px;color:var(--muted);margin:4px 0}
.chart-legend i{display:inline-block;width:11px;height:11px;border-radius:2px;margin-right:5px;vertical-align:-1px}
.chart-sum{display:flex;gap:22px;flex-wrap:wrap;margin-top:6px}
.hbar{display:grid;grid-template-columns:minmax(120px,32%) 1fr auto;gap:12px;align-items:center;margin:7px 0}
.hbar-name{font-size:14px}.hbar-track{background:#edf1f5;border-radius:6px;height:14px}.hbar-fill{background:var(--brand);height:14px;border-radius:6px}
.hbar-val{font-size:14px;white-space:nowrap}
@media(max-width:860px){.hbar{grid-template-columns:1fr}.hbar-val{justify-self:start}}

/* ===== Ô tìm kiếm dùng chung ===== */
.pick-list{position:absolute;left:0;right:0;top:100%;z-index:30;background:#fff;border:1px solid #b9c4cf;border-radius:8px;box-shadow:0 8px 24px rgba(16,40,60,.18);max-height:320px;overflow:auto;margin-top:2px}
.pick-item{padding:9px 12px;border-bottom:1px solid #eef1f4;cursor:pointer;font-size:14.5px;line-height:1.35}
.pick-item:last-child{border-bottom:0}.pick-item.on,.pick-item:hover{background:var(--accent)}
.pick-meta{display:block;color:var(--muted);font-size:12.5px}
.pick-empty{padding:12px;color:var(--muted);font-size:14px}

/* ===== Bán hàng nhanh ===== */
.pos-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.pos-done{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.pos-searchbox{display:flex;gap:8px}.pos-searchbox input{font-size:16px;padding:12px}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-top:12px}
.tiles.loading{opacity:.55}
.tile{display:flex;flex-direction:column;gap:3px;text-align:left;padding:10px 12px;min-height:84px;background:#fff;border:1px solid #cfd8e0;border-radius:10px;font:inherit;cursor:pointer}
.tile:active{background:var(--accent);transform:scale(.98)}
.tile-name{font-weight:600;line-height:1.25}.tile-price{color:var(--brand);font-weight:600}.tile-meta{color:var(--muted);font-size:12.5px;margin-top:auto}
.tile.out{border-style:dashed;opacity:.8}
.pos-empty{padding:14px 0;grid-column:1/-1}
.cart-row{display:grid;grid-template-columns:1fr auto 96px 88px auto;gap:8px;align-items:center;padding:8px 0;border-bottom:1px solid var(--line)}
.cart-row.over{background:#fff7e6}
.cart-name{font-weight:600;line-height:1.25}.cart-name small{display:block;color:var(--muted);font-weight:400}
.cart-row.over .cart-name small{color:var(--danger)}
.cart-qty{display:flex;align-items:center;gap:4px}
.cart-qty input{width:64px;text-align:center;padding:8px 4px}
.cart-qty button,.cart-del{width:38px;height:38px;border:1px solid #cfd8e0;background:#fff;border-radius:8px;font-size:18px;cursor:pointer}
.cart-price{text-align:right;padding:8px}
.cart-sum{text-align:right;font-weight:700}
.cart-del{color:var(--danger)}
.quick-amount{margin-top:12px}.quick-amount summary{cursor:pointer;color:var(--brand)}.quick-amount input{margin:8px 0 4px;font-size:16px}
.pos-total{font-size:22px;margin:6px 0 4px}
.seg{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.seg button{padding:12px 6px;border:2px solid #cfd8e0;background:#fff;border-radius:10px;font:inherit;cursor:pointer}
.seg button.on{border-color:var(--brand);background:var(--accent);font-weight:700}
.chip{display:inline-flex;align-items:center;gap:8px;background:var(--accent);padding:8px 12px;border-radius:99px;font-weight:600}
.chip button{border:0;background:transparent;font-size:16px;cursor:pointer;color:var(--danger)}
.pos-submit{width:100%;padding:15px;font-size:17px;font-weight:700}
.pos-bar{position:fixed;left:0;right:0;bottom:0;z-index:15;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 16px;background:#fff;border-top:1px solid var(--line);box-shadow:0 -4px 14px rgba(0,0,0,.08)}
.pos-bar b{font-size:19px}
#pos{padding-bottom:70px}

/* ===== Thanh điều hướng dưới (điện thoại) ===== */
.tabbar{display:none}
@media(max-width:860px){
  body{padding-bottom:62px}
  .tabbar{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;z-index:25;background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}
  .tabbar a,.tabbar button{display:flex;flex-direction:column;align-items:center;gap:2px;padding:7px 2px;font:inherit;font-size:11.5px;color:#42505e;background:none;border:0;text-decoration:none;cursor:pointer}
  .tabbar .ico{font-size:20px;line-height:1}
  .tabbar .on{color:var(--brand);font-weight:700}
  .pos-bar{bottom:calc(62px + env(safe-area-inset-bottom))}
  .menu-btn{display:none!important}
  .top{padding:10px 14px}
  input,select,textarea,.btn{min-height:44px}.btn.sm{min-height:36px}
  input,select,textarea{font-size:16px} /* tránh iOS tự phóng to khi chạm vào ô nhập */
  .cart-row{grid-template-columns:1fr auto;grid-template-areas:"name del" "qty sum" "price price"}
  .cart-name{grid-area:name}.cart-del{grid-area:del}.cart-qty{grid-area:qty}.cart-sum{grid-area:sum}.cart-price{grid-area:price;text-align:left}
  .tiles{grid-template-columns:repeat(2,1fr)}
  h1{font-size:19px}
  /* Bảng dạng thẻ: mỗi dòng là một thẻ, nhãn cột lấy từ tiêu đề */
  table.stack{border:0;background:transparent}
  table.stack tr.stack-head{display:none}
  table.stack,table.stack tbody{display:block}
  table.stack tr{display:block;background:#fff;border:1px solid var(--line);border-radius:10px;margin:8px 0;padding:6px 12px}
  table.stack td{display:flex;justify-content:space-between;align-items:center;gap:14px;border:0;padding:5px 0;text-align:right}
  table.stack td[data-label]::before{content:attr(data-label);font-weight:600;color:var(--muted);text-align:left;flex-shrink:0}
  table.stack td.act{justify-content:flex-start;flex-wrap:wrap;gap:8px;padding-top:8px;border-top:1px dashed var(--line);margin-top:4px}
  table.stack td[colspan]{display:block;text-align:left}
  table.stack td:empty{display:none}
  .tw:has(table.stack){border:0;overflow:visible}
}
@media(min-width:861px){.pos-bar{left:236px}}

[hidden]{display:none!important}

.tile.low{border-color:#e0a030;background:#fffaf0}.tile.low .tile-meta{color:#8a5a00;font-weight:600}
.alert-card{border-color:#e0a030;background:#fffaf0}