:root {
    --bg: #f4f6fa;
    --card: #fff;
    --text: #1d2433;
    --muted: #6b7489;
    --border: #e2e6ee;
    --primary: #1f6feb;
    --primary-dark: #1859c2;
    --primary-soft: #e8f0fe;
    --success: #1a8f4a;
    --success-soft: #e3f5ea;
    --danger: #d13b3b;
    --danger-soft: #fdeaea;
    --warning: #b7791f;
    --warning-soft: #fdf3e1;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(20, 30, 50, .08);
    --sidebar: 220px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

a { color: var(--primary); text-decoration: none; }
h1 { font-size: 22px; margin: 0; }
h2 { font-size: 17px; margin: 0 0 12px; }
h3 { font-size: 15px; margin: 0 0 8px; }

/* ---------- Layout ---------- */
.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar);
    background: #172033;
    color: #c9d1e3;
    position: fixed;
    inset: 0 auto 0 0;
    display: flex;
    flex-direction: column;
    padding: 16px 10px;
    z-index: 20;
}
.sidebar .brand { color: #fff; font-weight: 700; font-size: 16px; padding: 4px 10px 18px; }
.sidebar .brand small { display: block; color: #8a95ad; font-weight: 400; font-size: 12px; }
.sidebar .rate { display: block; margin: -8px 10px 14px; padding: 6px 10px; border-radius: 6px; background: #222d44; color: #c9d1e3; font-size: 13px; }
.sidebar nav a {
    display: flex; align-items: center; gap: 10px;
    color: #c9d1e3; padding: 10px 12px; border-radius: 8px; margin-bottom: 2px;
}
.sidebar nav a:hover { background: #222d44; }
.sidebar nav a.active { background: var(--primary); color: #fff; }
.sidebar nav a .ico { width: 20px; text-align: center; }
.sidebar .user { margin-top: auto; padding: 10px 12px; font-size: 13px; border-top: 1px solid #2a3550; }
.sidebar .user button { margin-top: 8px; width: 100%; }

.main { margin-left: var(--sidebar); flex: 1; padding: 20px 24px 40px; min-width: 0; }
.page-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.page-head .spacer { flex: 1; }

.bottom-nav, .mobile-menu { display: none; }

/* ---------- Components ---------- */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px;
    margin-bottom: 16px;
}
.card.flush { padding: 0; overflow: hidden; }

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    border: 1px solid var(--border); background: #fff; color: var(--text);
    padding: 8px 14px; border-radius: 8px; font: inherit; cursor: pointer; white-space: nowrap;
    min-height: 38px;
}
.btn:hover { background: #f1f3f7; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.success { background: var(--success); border-color: var(--success); color: #fff; }
.btn.danger { background: #fff; border-color: var(--danger); color: var(--danger); }
.btn.danger:hover { background: var(--danger-soft); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.sm { padding: 4px 10px; min-height: 30px; font-size: 13px; }
.btn.lg { padding: 12px 20px; font-size: 17px; min-height: 50px; font-weight: 600; }
.btn.block { width: 100%; }

input, select, textarea {
    font: inherit; color: inherit;
    border: 1px solid var(--border); border-radius: 8px;
    padding: 8px 10px; background: #fff; width: 100%; min-height: 38px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary-soft); border-color: var(--primary); }
input[type=checkbox] { width: auto; min-height: 0; }
label.field { display: block; margin-bottom: 12px; }
label.field > span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.check { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; cursor: pointer; }

.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.row > * { flex: 1; min-width: 140px; }
.row > .auto { flex: 0 0 auto; min-width: 0; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 12px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); font-weight: 600; background: #fafbfd; }
tr.clickable { cursor: pointer; }
tr.clickable:hover td { background: #f7f9fc; }
td.num, th.num { text-align: right; white-space: nowrap; }
.table-wrap { overflow-x: auto; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge.red { background: var(--danger-soft); color: var(--danger); }
.badge.green { background: var(--success-soft); color: var(--success); }
.badge.yellow { background: var(--warning-soft); color: var(--warning); }
.badge.blue { background: var(--primary-soft); color: var(--primary); }
.badge.gray { background: #eef0f4; color: var(--muted); }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.red { color: var(--danger); }
.green { color: var(--success); }
.bold { font-weight: 600; }
.right { text-align: right; }
.empty { text-align: center; color: var(--muted); padding: 30px 10px; }
.mono { font-family: ui-monospace, Menlo, monospace; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; overflow-x: auto; }
.tabs button {
    border: none; background: none; font: inherit; padding: 10px 14px; cursor: pointer;
    color: var(--muted); border-bottom: 2px solid transparent; white-space: nowrap;
}
.tabs button.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; margin-bottom: 16px; }
a.stat { color: inherit; display: block; }
a.stat:hover { border-color: var(--primary); }
.stat { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); }
.stat .label { font-size: 13px; color: var(--muted); }
.stat .value { font-size: 22px; font-weight: 700; margin-top: 2px; }
.stat .sub { font-size: 12px; color: var(--muted); margin-top: 2px; }

.chart { display: flex; align-items: flex-end; gap: 6px; height: 160px; padding-top: 10px; }
.chart .bar { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; height: 100%; min-width: 0; }
.chart .bar .fill { width: 100%; max-width: 36px; background: var(--primary); border-radius: 4px 4px 0 0; min-height: 2px; }
.chart .bar .fill.profit { background: var(--success); }
.chart .bar .d { font-size: 11px; color: var(--muted); margin-top: 4px; }

/* ---------- Modal ---------- */
.modal-back {
    position: fixed; inset: 0; background: rgba(15, 22, 36, .45); z-index: 100;
    display: flex; align-items: flex-start; justify-content: center; padding: 40px 16px; overflow-y: auto;
}
.modal {
    background: #fff; border-radius: 12px; width: 100%; max-width: 560px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, .2);
}
.modal.wide { max-width: 860px; }
.modal-head { display: flex; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.modal-head h2 { margin: 0; flex: 1; }
.modal-body { padding: 18px; }
.modal-foot { display: flex; gap: 8px; justify-content: flex-end; padding: 12px 18px; border-top: 1px solid var(--border); flex-wrap: wrap; }

/* ---------- Toast ---------- */
.toasts { position: fixed; top: 16px; right: 16px; z-index: 200; display: flex; flex-direction: column; gap: 8px; max-width: 360px; }
.toast { background: #1d2433; color: #fff; padding: 10px 14px; border-radius: 8px; box-shadow: var(--shadow); font-size: 14px; }
.toast.error { background: var(--danger); }
.toast.success { background: var(--success); }

/* ---------- Barcode input ---------- */
.scan-box { display: flex; gap: 8px; }
.scan-box input { font-size: 16px; }
.scan-box .scan-ico { font-size: 18px; }
#camera-reader { width: 100%; min-height: 240px; background: #000; border-radius: 8px; overflow: hidden; }

.autocomplete { position: relative; }
.autocomplete .list {
    position: absolute; left: 0; right: 0; top: 100%; z-index: 30; background: #fff;
    border: 1px solid var(--border); border-radius: 8px; box-shadow: 0 6px 20px rgba(0, 0, 0, .12);
    max-height: 320px; overflow-y: auto; margin-top: 4px;
}
.autocomplete .list .opt { padding: 9px 12px; cursor: pointer; border-bottom: 1px solid #f1f3f7; }
.autocomplete .list .opt:hover, .autocomplete .list .opt.hl { background: var(--primary-soft); }

/* ---------- POS ---------- */
.pos { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 16px; align-items: start; }
.pos .row > .scan-box { min-width: 260px; flex: 3; }
.pos .row > .autocomplete { flex: 2; min-width: 200px; }
.pos .cart td { padding: 8px 10px; }
.pos .cart input { min-height: 34px; padding: 4px 8px; text-align: right; }
.pos .qty-input { width: 90px; }
.pos .price-input { width: 120px; }
.pos .total-box { font-size: 15px; }
.pos .total-box .line { display: flex; justify-content: space-between; padding: 4px 0; }
.pos .total-box .grand { font-size: 26px; font-weight: 700; border-top: 1px dashed var(--border); margin-top: 6px; padding-top: 8px; }
.seg { display: flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; margin-bottom: 12px; }
.seg button { flex: 1; border: none; background: #fff; padding: 9px; font: inherit; cursor: pointer; }
.seg button.active { background: var(--primary); color: #fff; }

/* ---------- Login ---------- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px; }
.login-card { width: 100%; max-width: 380px; }
.login-card .logo { width: 56px; height: 56px; margin: 0 auto 10px; display: block; }

/* ---------- Print ---------- */
#print-area { display: none; }
@media print {
    @page { margin: 4mm; }
    body > #app, .toasts { display: none !important; }
    #print-area { display: block; }
    .receipt { width: 72mm; font: 12px/1.35 "Courier New", monospace; color: #000; }
    .receipt h3 { text-align: center; font-size: 14px; margin: 0 0 4px; }
    .receipt .c { text-align: center; }
    .receipt table td { padding: 2px 0; border: none; font-size: 12px; }
    .receipt hr { border: none; border-top: 1px dashed #000; margin: 6px 0; }
    .receipt .row2 { display: flex; justify-content: space-between; }
    .labels { display: flex; flex-wrap: wrap; gap: 2mm; }
    .label { width: 58mm; height: 38mm; border: 1px dashed #bbb; padding: 2mm; text-align: center; overflow: hidden; page-break-inside: avoid; }
    .label .n { font: 600 11px/1.2 Arial, sans-serif; height: 27px; overflow: hidden; }
    .label .p { font: 700 14px Arial, sans-serif; }
    .label svg { max-width: 100%; height: 60px; }
}

/* ---------- Mobile ---------- */
@media (max-width: 1150px) {
    .pos { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 760px) {
    .sidebar { display: none; }
    .main { margin-left: 0; padding: 14px 12px 90px; }
    .bottom-nav {
        display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
        background: #fff; border-top: 1px solid var(--border); padding-bottom: env(safe-area-inset-bottom);
    }
    .bottom-nav a { flex: 1; text-align: center; padding: 8px 2px; color: var(--muted); font-size: 11px; }
    .bottom-nav a .ico { display: block; font-size: 20px; }
    .bottom-nav a.active { color: var(--primary); }
    .mobile-menu { display: block; position: fixed; inset: 0; z-index: 45; background: rgba(15, 22, 36, .35); }
    .mobile-menu .sheet {
        position: absolute; left: 0; right: 0; bottom: calc(56px + env(safe-area-inset-bottom));
        background: #fff; border-radius: 14px 14px 0 0; padding: 8px; box-shadow: 0 -6px 24px rgba(0, 0, 0, .15);
    }
    .mobile-menu .sheet a { display: flex; gap: 12px; padding: 12px; border-radius: 8px; color: var(--text); font-size: 16px; }
    .mobile-menu .sheet a.active { background: var(--primary-soft); color: var(--primary); }
    .grid2, .grid3 { grid-template-columns: 1fr; }
    .modal-back { padding: 0; }
    .modal { border-radius: 0; min-height: 100vh; }
    th, td { padding: 8px; }
    .hide-sm { display: none; }
    .stat .value { font-size: 19px; }
}