:root {
  --bg: #f3f5f8;
  --panel: #ffffff;
  --ink: #1b2330;
  --muted: #687385;
  --line: #e2e6ec;
  --brand: #1f6feb;
  --brand-ink: #ffffff;
  --side: #121a26;
  --side-ink: #c9d3e0;
  --ok: #1a7f37;
  --warn: #b35900;
  --bad: #c62828;
  --chip: #eef2f7;
  --radius: 10px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { font: 15px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--ink); }
.hidden { display: none !important; }
button, input, select, textarea { font: inherit; color: inherit; }
input, select, textarea { width: 100%; padding: 9px 11px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--brand); outline-offset: -1px; border-color: transparent; }
label { display: block; font-size: 12px; font-weight: 600; color: var(--muted); margin: 10px 0 4px; text-transform: uppercase; letter-spacing: .03em; }
h1 { font-size: 22px; margin: 0; }
h2 { font-size: 17px; margin: 18px 0 8px; }
h3 { font-size: 15px; margin: 0 0 6px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.right { text-align: right; }
.ok { color: var(--ok); } .bad { color: var(--bad); } .warn { color: var(--warn); }

.btn { border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 9px 14px; cursor: pointer; font-weight: 600; white-space: nowrap; }
.btn:hover { border-color: #c4ccd8; }
.btn.primary { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); }
.btn.danger { color: var(--bad); }
.btn.success { background: var(--ok); border-color: var(--ok); color: #fff; }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.small { padding: 5px 10px; font-size: 13px; }
.btn.big { padding: 16px; font-size: 18px; width: 100%; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.row { display: flex; gap: 10px; align-items: center; }
.row.wrap { flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 14px; }
.chip { display: inline-block; padding: 2px 8px; border-radius: 99px; background: var(--chip); font-size: 12px; font-weight: 600; }
.chip.ok { background: #e3f4e8; } .chip.bad { background: #fde8e8; } .chip.warn { background: #fff1de; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }

/* login */
.login { min-height: 100%; display: grid; place-items: center; background: var(--side); padding: 16px; }
.login-box { background: #fff; border-radius: 14px; padding: 28px; width: 100%; max-width: 380px; }
.login-box h1 { margin-bottom: 4px; }
.user-pick { display: grid; grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 8px; margin: 14px 0; }
.user-pick button { padding: 12px 6px; border: 2px solid var(--line); border-radius: 10px; background: #fff; cursor: pointer; font-weight: 600; }
.user-pick button.sel { border-color: var(--brand); background: #eaf2ff; }
.pin { font-size: 26px; letter-spacing: 10px; text-align: center; }
.keypad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 10px; }
.keypad button { padding: 14px; font-size: 20px; border: 1px solid var(--line); border-radius: 10px; background: #f7f9fc; cursor: pointer; }

/* shell */
.shell { display: flex; height: 100%; }
.side { width: 190px; background: var(--side); color: var(--side-ink); display: flex; flex-direction: column; padding: 14px 10px; flex-shrink: 0; }
.brand { color: #fff; font-weight: 800; font-size: 17px; padding: 4px 10px 16px; }
.nav { display: flex; gap: 10px; align-items: center; padding: 10px; border-radius: 8px; cursor: pointer; color: var(--side-ink); text-decoration: none; }
.nav:hover { background: #1d2838; }
.nav.active { background: var(--brand); color: #fff; }
.side-foot { margin-top: auto; padding: 10px; font-size: 13px; }
.side-foot .btn { color: var(--side-ink); padding-left: 0; }
main { flex: 1; overflow: auto; padding: 20px 24px; min-width: 0; }
.page-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.page-head h1 { margin-right: auto; }

/* tables */
.table-wrap { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 9px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); background: #fafbfc; position: sticky; top: 0; }
tr.click { cursor: pointer; }
tr.click:hover td { background: #f6f9ff; }
tbody tr:last-child td { border-bottom: 0; }

/* register */
.register { display: grid; grid-template-columns: 1fr 380px; gap: 18px; height: calc(100vh - 40px); }
.reg-left { display: flex; flex-direction: column; min-height: 0; }
.scan { font-size: 18px; padding: 13px 14px; }
.tabs { display: flex; gap: 6px; margin: 12px 0; flex-wrap: wrap; }
.tabs button { border: 1px solid var(--line); background: #fff; padding: 7px 14px; border-radius: 99px; cursor: pointer; font-weight: 600; }
.tabs button.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); grid-auto-rows: max-content; gap: 10px; overflow: auto; padding-bottom: 10px; align-content: start; }
.tile { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; cursor: pointer; text-align: left; display: flex; flex-direction: column; gap: 4px; min-height: 104px; }
.tile:hover { border-color: var(--brand); box-shadow: 0 2px 8px rgba(31,111,235,.12); }
.tile .t-name { font-weight: 700; }
.tile .t-price { margin-top: auto; font-weight: 800; font-size: 16px; }
.tile.out { opacity: .5; }
.cart { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); display: flex; flex-direction: column; min-height: 0; }
.cart-head { padding: 12px 14px; border-bottom: 1px solid var(--line); }
.cart-lines { flex: 1; overflow: auto; }
.cart-line { padding: 10px 14px; border-bottom: 1px solid var(--line); }
.cart-line .l-top { display: flex; gap: 8px; }
.cart-line .l-name { font-weight: 600; flex: 1; }
.cart-line .l-actions { display: flex; gap: 4px; align-items: center; margin-top: 6px; }
.qty-btn { width: 30px; height: 30px; border: 1px solid var(--line); background: #f7f9fc; border-radius: 6px; cursor: pointer; font-weight: 700; }
.cart-empty { padding: 40px 14px; text-align: center; color: var(--muted); }
.totals { padding: 12px 14px; border-top: 1px solid var(--line); }
.totals .t-row { display: flex; justify-content: space-between; padding: 2px 0; }
.totals .t-total { font-size: 22px; font-weight: 800; padding-top: 6px; }

/* modal */
.modal { position: fixed; inset: 0; background: rgba(10,16,26,.55); display: grid; place-items: center; z-index: 50; padding: 16px; }
.modal-box { background: #fff; border-radius: 14px; width: 100%; max-width: 560px; max-height: calc(100vh - 32px); overflow: auto; padding: 20px; }
.modal-box.wide { max-width: 900px; }
.modal-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.modal-head h1 { font-size: 19px; margin-right: auto; }
.modal-foot { display: flex; gap: 8px; justify-content: flex-end; margin-top: 18px; flex-wrap: wrap; }

.pay-due { text-align: center; padding: 10px 0 14px; }
.pay-due .amt { font-size: 38px; font-weight: 800; }
.pay-methods { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.pay-methods button { padding: 14px 6px; border: 2px solid var(--line); border-radius: 10px; background: #fff; cursor: pointer; font-weight: 700; }
.pay-methods button.sel { border-color: var(--brand); background: #eaf2ff; }
.quick { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.change { font-size: 24px; font-weight: 800; color: var(--ok); text-align: center; margin: 12px 0; }
.waiting { text-align: center; padding: 18px; }
.spinner { width: 42px; height: 42px; border: 4px solid var(--line); border-top-color: var(--brand); border-radius: 50%; animation: spin 1s linear infinite; margin: 0 auto 12px; }
@keyframes spin { to { transform: rotate(360deg); } }

.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat .s-label { font-size: 12px; color: var(--muted); text-transform: uppercase; font-weight: 700; letter-spacing: .03em; }
.stat .s-val { font-size: 24px; font-weight: 800; margin-top: 2px; }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.receipt-preview { background: #fafafa; border: 1px dashed var(--line); padding: 14px; font-family: ui-monospace, Menlo, monospace; font-size: 12.5px; white-space: pre-wrap; }

.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 11px 18px; border-radius: 10px; z-index: 80; white-space: pre-line; max-width: 90vw; }
.toast.bad { background: var(--bad); }

.cam { position: fixed; inset: 0; background: rgba(10,16,26,.8); display: grid; place-items: center; z-index: 70; padding: 16px; }
.cam-box { background: #fff; border-radius: 14px; padding: 14px; width: 100%; max-width: 520px; }
.cam-view { position: relative; margin-top: 10px; background: #000; border-radius: 10px; overflow: hidden; aspect-ratio: 4 / 3; }
.cam-view video { width: 100%; height: 100%; object-fit: cover; display: block; }
.cam-aim { position: absolute; left: 8%; right: 8%; top: 38%; bottom: 38%; border: 3px solid rgba(255,255,255,.85); border-radius: 8px; box-shadow: 0 0 0 999px rgba(0,0,0,.25); transition: border-color .15s; }
.cam-aim.hit { border-color: #2ecc71; }
#cam-list { max-height: 120px; overflow: auto; }
.lang-btn { color: var(--side-ink); padding-left: 0; display: block; }
.scan-row { display: flex; gap: 8px; }
.scan-row .btn { font-size: 20px; padding: 0 16px; }

@media (max-width: 900px) {
  .shell { flex-direction: column; }
  .side { width: auto; flex-direction: row; overflow-x: auto; padding: 6px; align-items: center; }
  .brand, .side-foot #who { display: none; }
  .nav span { display: none; }
  .side-foot { margin: 0 0 0 auto; padding: 0; }
  main { padding: 14px 16px; }
  .register { grid-template-columns: 1fr; height: auto; }
  .cart { min-height: 320px; }
  .cols, .grid2, .grid3 { grid-template-columns: 1fr; }
  .pay-methods { grid-template-columns: repeat(2, 1fr); }
}

/* notices, download list, checkbox list */
.notice { background: #fff6e5; border: 1px solid #f3d9a6; color: var(--ink); border-radius: 8px; padding: 8px 10px; margin: 8px 0; font-size: 14px; }
.notice.bad { background: #fdecec; border-color: #f2c0c0; }
.side .notice { margin: 0 0 8px; }
.dl-list { display: grid; gap: 8px; margin-top: 8px; }
.dl-list .btn { text-align: left; white-space: normal; }
.checks { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 14px; }
.check { display: flex; gap: 8px; align-items: center; text-transform: none; font-size: 14px; font-weight: 500; color: var(--ink); margin: 4px 0; letter-spacing: 0; }
.check input { width: auto; }
@media (max-width: 600px) { .checks { grid-template-columns: 1fr; } }

/* store logo */
.brand-logo { display: block; background: #fff; border-radius: 10px; padding: 8px 10px; }
.brand-logo img { display: block; max-width: 100%; max-height: 54px; margin: 0 auto; }
.login-logo { display: block; max-width: 280px; max-height: 96px; margin: 4px auto 10px; }
.logo-prev { max-width: 220px; max-height: 70px; border: 1px solid var(--line); border-radius: 8px; padding: 6px; background: #fff; }
.logo-row { gap: 10px; align-items: center; }