:root {
  --bg: #f3f4f6; --card: #fff; --text: #111827; --muted: #6b7280; --line: #e5e7eb;
  --accent: #1d4ed8; --accent-text: #fff; --danger: #b91c1c; --ok: #15803d; --warn: #b45309;
  font: 16px/1.4 system-ui, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
[hidden] { display: none !important; }
button, input, select { font: inherit; }
button { padding: .55em .9em; border: 1px solid var(--line); border-radius: 8px; background: var(--card); cursor: pointer; }
button:hover { border-color: var(--accent); }
a.btn { padding: .55em .9em; border: 1px solid var(--line); border-radius: 8px; color: inherit; text-decoration: none; background: var(--card); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button.danger { color: var(--danger); }
input { padding: .55em .7em; border: 1px solid var(--line); border-radius: 8px; width: 100%; }
input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
small { font-weight: 400; color: var(--muted); }
.muted { color: var(--muted); }
.error { color: var(--danger); min-height: 1.4em; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.row { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 2px 0; }

/* Connexion */
#login { min-height: 100vh; display: grid; place-items: center; }
.login-card { width: min(360px, 92vw); display: grid; gap: 12px; }
.login-card h1 { margin: 0 0 4px; font-size: 1.5rem; }
.login-card label { display: grid; gap: 4px; font-size: .9rem; color: var(--muted); }

.login-card label.check { display: flex; align-items: center; gap: 8px; color: var(--text); }
.login-card label.check input { width: auto; }

/* Mode démo : impossible à confondre avec la vraie caisse */
body.demo .topbar { background: repeating-linear-gradient(135deg, #fed7aa 0 18px, #ffedd5 18px 36px); }
.demo-badge { font-weight: 700; color: #9a3412; background: #fff7ed; border: 2px solid #ea580c; padding: 2px 10px; border-radius: 6px; }

/* Caisse */
.topbar { display: flex; align-items: center; gap: 10px; padding: 8px 14px; background: var(--card); border-bottom: 1px solid var(--line); }
.spacer { flex: 1; }
.status { font-size: .9rem; padding: 2px 10px; border-radius: 999px; }
.status.online { background: #dcfce7; color: var(--ok); }
.status.offline { background: #fef3c7; color: var(--warn); }
.layout { display: grid; grid-template-columns: 1fr 380px; gap: 14px; padding: 14px; height: calc(100vh - 54px); }
.left { display: flex; flex-direction: column; min-height: 0; }
.right { display: flex; flex-direction: column; gap: 12px; overflow: auto; }
.scan { position: relative; margin-bottom: 10px; }
#scan { font-size: 1.15rem; padding: .7em .9em; }
.results { position: absolute; z-index: 5; left: 0; right: 0; margin: 4px 0 0; padding: 4px; list-style: none;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px; max-height: 60vh; overflow: auto;
  box-shadow: 0 10px 30px rgb(0 0 0 / .12); }
.results li { display: flex; justify-content: space-between; gap: 10px; padding: 8px 10px; border-radius: 6px; cursor: pointer; }
.results li.active, .results li:hover { background: #eff6ff; }
.cart { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 12px; overflow: hidden; }
.left .cart { display: block; overflow: auto; flex: 1; }
.cart thead, .cart tbody { display: table; width: 100%; table-layout: fixed; }
.cart th, .cart td { padding: 9px 10px; border-bottom: 1px solid var(--line); text-align: left; }
.cart th:nth-child(1), .cart td:nth-child(1) { width: 52%; }
.cart th { font-size: .85rem; color: var(--muted); font-weight: 500; }
.cart tbody tr { cursor: pointer; }
.cart tbody tr:hover { background: #f9fafb; }
.cart tr.return td { color: var(--danger); }
.cart .sku { display: block; font-size: .8rem; color: var(--muted); }
.totals .total { font-size: 1.35rem; font-weight: 700; border-top: 1px solid var(--line); margin-top: 6px; padding-top: 6px; }
.totals .due { font-size: 1.2rem; font-weight: 600; color: var(--accent); }
#paid-list .row { color: var(--muted); font-size: .95rem; }
.pay { display: grid; gap: 10px; }
#pay-amount { font-size: 1.3rem; text-align: right; }
.methods { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.methods button { padding: .8em; font-weight: 600; }
#paid-list button.x { padding: 0 .45em; margin-left: 6px; line-height: 1.4; color: var(--danger); }
#dialog-body .change { font-size: 1.4rem; text-align: center; padding: 8px; background: #fef3c7; border-radius: 10px; }
#dialog-body .spacer { flex: 1; }
#dialog-body .buttons button { white-space: nowrap; }
.actions { display: flex; gap: 8px; }
.actions button { flex: 1; }

dialog { border: none; border-radius: 14px; padding: 0; width: min(560px, 94vw); box-shadow: 0 20px 50px rgb(0 0 0 / .25); }
dialog::backdrop { background: rgb(0 0 0 / .35); }
#dialog-body { padding: 18px; display: grid; gap: 12px; }
#dialog-body h2 { margin: 0; font-size: 1.2rem; }
#dialog-body .list { max-height: 50vh; overflow: auto; border: 1px solid var(--line); border-radius: 8px; }
#dialog-body .list > div { padding: 8px 10px; border-bottom: 1px solid var(--line); cursor: pointer; display: flex; justify-content: space-between; gap: 8px; }
#dialog-body .list > div:hover { background: #eff6ff; }
#dialog-body .buttons { display: flex; gap: 8px; justify-content: flex-end; }
#dialog-body .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

/* Reçu 80 mm */
#receipt { display: none; }
@media print {
  @page { size: 80mm auto; margin: 3mm; }
  body { background: #fff; }
  body > *:not(#receipt) { display: none !important; }
  #receipt { display: block; font: 11px/1.35 "Courier New", monospace; color: #000; width: 74mm; }
  #receipt .c { text-align: center; }
  #receipt .r { display: flex; justify-content: space-between; gap: 6px; }
  #receipt hr { border: none; border-top: 1px dashed #000; margin: 4px 0; }
  #receipt .big { font-size: 14px; font-weight: 700; }
}