/* Smart POS — base stylesheet (no external dependencies) */
:root {
  --bg: #f3f5f9;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --border: #e3e8ef;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-600: #1d4ed8;
  --primary-50: #eff4ff;
  --side: #0f1e3a;
  --side-2: #172a4f;
  --side-text: #c7d2e6;
  --green: #059669; --green-50: #e7f7f0;
  --red: #dc2626;   --red-50: #fdecec;
  --amber: #d97706; --amber-50: #fdf3e2;
  --grey-50: #eef1f5;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(15,23,42,.06), 0 4px 14px rgba(15,23,42,.05);
  --font: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, "Noto Sans Bengali", sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font-family: var(--font); font-size: 14px; color: var(--text); background: var(--bg); line-height: 1.45; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { margin: 0 0 .5rem; line-height: 1.25; }
h1 { font-size: 1.35rem; } h2 { font-size: 1.1rem; } h3 { font-size: 1rem; }
.icon { width: 18px; height: 18px; flex: none; vertical-align: -3px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.right { text-align: right; } .center { text-align: center; }
.nowrap { white-space: nowrap; }
.mt-0 { margin-top: 0; } .mt-1 { margin-top: .5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; }
.mb-0 { margin-bottom: 0; } .mb-1 { margin-bottom: .5rem; } .mb-2 { margin-bottom: 1rem; }
.flex { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.between { justify-content: space-between; }
.grow { flex: 1; }
.hidden { display: none !important; }
.text-green { color: var(--green); } .text-red { color: var(--red); } .text-amber { color: var(--amber); }
.fw-600 { font-weight: 600; }

/* ---------- App shell ---------- */
.app { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.sidebar { background: var(--side); color: var(--side-text); position: sticky; top: 0; height: 100vh; overflow-y: auto; padding: 0 0 2rem; }
.brand { display: flex; align-items: center; gap: .6rem; padding: 1rem 1.1rem; color: #fff; font-weight: 700; font-size: 1.05rem; border-bottom: 1px solid rgba(255,255,255,.06); }
.brand img { width: 32px; height: 32px; object-fit: contain; border-radius: 6px; background: #fff; }
.brand .logo-mark { width: 32px; height: 32px; border-radius: 8px; background: var(--primary); display: grid; place-items: center; color: #fff; }
.nav { padding: .5rem .6rem; }
.nav-label { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: #7a8bab; padding: .9rem .6rem .35rem; }
.nav a { display: flex; align-items: center; gap: .65rem; color: var(--side-text); padding: .5rem .6rem; border-radius: 8px; font-size: 13.5px; }
.nav a:hover { background: var(--side-2); color: #fff; text-decoration: none; }
.nav a.active { background: var(--primary); color: #fff; }
.nav a .icon { width: 17px; height: 17px; opacity: .9; }
.main { min-width: 0; display: flex; flex-direction: column; }
.topbar { height: 58px; background: var(--surface); border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: .75rem; padding: 0 1.25rem; position: sticky; top: 0; z-index: 20; }
.topbar .menu-btn { display: none; }
.content { padding: 1.25rem; max-width: 1500px; width: 100%; }
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.page-head h1 { margin: 0; }
.crumbs { font-size: 12px; color: var(--muted); }

/* ---------- Cards / grid ---------- */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.card-body { padding: 1rem 1.1rem; }
.card-head { padding: .85rem 1.1rem; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; gap: .5rem; flex-wrap: wrap; }
.card-head h2, .card-head h3 { margin: 0; }
.grid { display: grid; gap: 1rem; }
.g-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.g-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.g-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.g-6 { grid-template-columns: repeat(6, minmax(0,1fr)); }
.g-main { grid-template-columns: minmax(0,2fr) minmax(0,1fr); }
.stat { padding: 1rem 1.1rem; display: flex; gap: .85rem; align-items: center; }
.stat .ico { width: 42px; height: 42px; border-radius: 10px; display: grid; place-items: center; background: var(--primary-50); color: var(--primary); }
.stat .ico.green { background: var(--green-50); color: var(--green); }
.stat .ico.red { background: var(--red-50); color: var(--red); }
.stat .ico.amber { background: var(--amber-50); color: var(--amber); }
.stat .label { color: var(--muted); font-size: 12.5px; }
.stat .value { font-size: 1.25rem; font-weight: 700; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: .4rem; border: 1px solid var(--border); background: var(--surface); color: var(--text); padding: .48rem .85rem; border-radius: 8px; font: inherit; font-weight: 500; cursor: pointer; line-height: 1.2; white-space: nowrap; }
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-600); }
.btn-green { background: var(--green); border-color: var(--green); color: #fff; }
.btn-green:hover { background: #047857; }
.btn-red { background: var(--red); border-color: var(--red); color: #fff; }
.btn-red:hover { background: #b91c1c; }
.btn-ghost { background: transparent; border-color: transparent; }
.btn-sm { padding: .3rem .55rem; font-size: 12.5px; }
.btn-sm .icon { width: 15px; height: 15px; }
.btn-lg { padding: .75rem 1.2rem; font-size: 15px; }
.btn-block { width: 100%; justify-content: center; }
.btn[disabled] { opacity: .55; cursor: not-allowed; }
.icon-btn { padding: .35rem; }

/* ---------- Forms ---------- */
label { display: block; font-weight: 500; margin-bottom: .3rem; font-size: 13px; }
.req::after { content: " *"; color: var(--red); }
input[type=text], input[type=number], input[type=email], input[type=password], input[type=date], input[type=search], input[type=tel], input[type=file], select, textarea {
  width: 100%; padding: .5rem .65rem; border: 1px solid #cfd7e3; border-radius: 8px; background: #fff; font: inherit; color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.15); }
textarea { min-height: 80px; resize: vertical; }
.field { margin-bottom: .9rem; }
.form-grid { display: grid; gap: 0 1rem; grid-template-columns: repeat(2, minmax(0,1fr)); }
.form-grid.g-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.form-grid .full { grid-column: 1 / -1; }
.help { font-size: 12px; color: var(--muted); margin-top: .25rem; }
.check { display: flex; align-items: center; gap: .45rem; font-weight: 400; cursor: pointer; }
.check input { width: 16px; height: 16px; }
.input-group { display: flex; }
.input-group > input, .input-group > select { border-radius: 8px 0 0 8px; }
.input-group > .btn { border-radius: 0 8px 8px 0; margin-left: -1px; }
.filters { display: flex; gap: .5rem; flex-wrap: wrap; align-items: end; }
.filters .field { margin: 0; min-width: 140px; }
.filters input, .filters select { padding: .42rem .6rem; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; }
table.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: .6rem .75rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
.table th { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); background: var(--surface-2); font-weight: 600; white-space: nowrap; }
.table tbody tr:hover { background: #fafbfe; }
.table td.num, .table th.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
.table tfoot td { font-weight: 700; background: var(--surface-2); }
.table .actions { white-space: nowrap; text-align: right; }
.table .actions form { display: inline; }
.table-sm th, .table-sm td { padding: .4rem .55rem; }
.thumb { width: 38px; height: 38px; border-radius: 6px; object-fit: cover; background: var(--grey-50); display: inline-grid; place-items: center; color: var(--muted); }
.empty { padding: 2.5rem 1rem; text-align: center; color: var(--muted); }

.badge { display: inline-block; padding: .15rem .5rem; border-radius: 999px; font-size: 11.5px; font-weight: 600; }
.badge-green { background: var(--green-50); color: var(--green); }
.badge-red { background: var(--red-50); color: var(--red); }
.badge-amber { background: var(--amber-50); color: var(--amber); }
.badge-grey { background: var(--grey-50); color: var(--muted); }
.badge-blue { background: var(--primary-50); color: var(--primary); }

.pager { display: flex; gap: .25rem; flex-wrap: wrap; }
.pager a, .pager span { padding: .35rem .65rem; border: 1px solid var(--border); border-radius: 6px; background: #fff; font-size: 13px; }
.pager .current { background: var(--primary); color: #fff; border-color: var(--primary); }
.list-foot { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: .75rem 1.1rem; flex-wrap: wrap; }

/* ---------- Alerts / toasts ---------- */
.alert { padding: .7rem .9rem; border-radius: 8px; margin-bottom: 1rem; border: 1px solid transparent; }
.alert-success { background: var(--green-50); color: #065f46; border-color: #bfe8d6; }
.alert-error { background: var(--red-50); color: #991b1b; border-color: #f6c9c9; }
.alert-info { background: var(--primary-50); color: #1e3a8a; border-color: #cbdafc; }
.alert-warning { background: var(--amber-50); color: #92400e; border-color: #f5dcae; }
.toasts { position: fixed; right: 1rem; top: 1rem; z-index: 1000; display: flex; flex-direction: column; gap: .5rem; max-width: 360px; }
.toast { background: #0f172a; color: #fff; padding: .7rem .9rem; border-radius: 8px; box-shadow: var(--shadow); font-size: 13.5px; animation: slidein .2s ease-out; }
.toast.error { background: var(--red); } .toast.success { background: var(--green); }
@keyframes slidein { from { transform: translateY(-8px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ---------- Dropdown / modal ---------- */
.dropdown { position: relative; }
.dropdown-menu { position: absolute; right: 0; top: calc(100% + 6px); min-width: 200px; background: #fff; border: 1px solid var(--border); border-radius: 10px; box-shadow: 0 10px 30px rgba(15,23,42,.12); padding: .35rem; display: none; z-index: 50; }
.dropdown.open .dropdown-menu { display: block; }
.dropdown-menu a, .dropdown-menu button { display: flex; width: 100%; gap: .5rem; align-items: center; padding: .5rem .6rem; border-radius: 6px; color: var(--text); background: none; border: 0; font: inherit; cursor: pointer; text-align: left; }
.dropdown-menu a:hover, .dropdown-menu button:hover { background: var(--surface-2); text-decoration: none; }
.modal-backdrop { position: fixed; inset: 0; background: rgba(15,23,42,.45); display: none; align-items: flex-start; justify-content: center; z-index: 900; padding: 5vh 1rem; overflow-y: auto; }
.modal-backdrop.open { display: flex; }
.modal { background: #fff; border-radius: 12px; width: 100%; max-width: 520px; box-shadow: 0 20px 60px rgba(15,23,42,.3); }
.modal.lg { max-width: 760px; }
.modal-head { padding: .9rem 1.1rem; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.modal-head h3 { margin: 0; }
.modal-body { padding: 1.1rem; }
.modal-foot { padding: .8rem 1.1rem; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: .5rem; }

/* ---------- Autocomplete ---------- */
.ac { position: relative; }
.ac-list { position: absolute; left: 0; right: 0; top: calc(100% + 2px); background: #fff; border: 1px solid var(--border); border-radius: 8px; box-shadow: 0 10px 30px rgba(15,23,42,.12); max-height: 320px; overflow-y: auto; z-index: 60; display: none; }
.ac-list.open { display: block; }
.ac-item { padding: .5rem .7rem; cursor: pointer; display: flex; justify-content: space-between; gap: .5rem; border-bottom: 1px solid var(--grey-50); }
.ac-item:last-child { border-bottom: 0; }
.ac-item:hover, .ac-item.active { background: var(--primary-50); }

/* ---------- Charts ---------- */
.chart svg { width: 100%; height: auto; display: block; }
.chart .bar { fill: var(--primary); }
.chart .bar:hover { fill: var(--primary-600); }
.chart .axis { stroke: var(--border); }
.chart text { font-size: 10px; fill: var(--muted); font-family: var(--font); }

/* ---------- Login ---------- */
.auth-page { min-height: 100vh; display: grid; grid-template-columns: 1.1fr 1fr; }
.auth-side { background: linear-gradient(150deg, #0f1e3a 0%, #1d3b7a 60%, #2563eb 100%); color: #fff; padding: 3rem; display: flex; flex-direction: column; justify-content: space-between; }
.auth-side h1 { font-size: 2rem; margin-top: 2rem; }
.auth-side ul { padding-left: 1.1rem; line-height: 2; color: #d6e1fb; }
.auth-form { display: grid; place-items: center; padding: 2rem; }
.auth-card { width: 100%; max-width: 380px; }

/* ---------- Permission matrix ---------- */
.perm-group { border: 1px solid var(--border); border-radius: 8px; padding: .75rem .9rem; }
.perm-group h3 { font-size: 13px; display: flex; justify-content: space-between; }

/* ---------- Line items editor ---------- */
.items-table input { padding: .35rem .5rem; }
.items-table td { padding: .4rem .5rem; }
.totals { width: 100%; max-width: 360px; margin-left: auto; }
.totals td { padding: .35rem .5rem; }
.totals tr.grand td { font-size: 1.05rem; font-weight: 700; border-top: 2px solid var(--text); }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .g-4, .g-6 { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .g-main { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: fixed; left: 0; top: 0; bottom: 0; width: 250px; z-index: 100; transform: translateX(-100%); transition: transform .2s; }
  body.nav-open .sidebar { transform: none; }
  body.nav-open::after { content: ""; position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 90; }
  .topbar .menu-btn { display: inline-flex; }
  .auth-page { grid-template-columns: 1fr; }
  .auth-side { display: none; }
}
@media (max-width: 640px) {
  .content { padding: .85rem; }
  .g-2, .g-3, .form-grid, .form-grid.g-3 { grid-template-columns: 1fr; }
  .g-4 { grid-template-columns: repeat(2, minmax(0,1fr)); gap: .6rem; }
  .g-4 .stat { padding: .7rem; gap: .55rem; }
  .g-4 .stat .ico { width: 32px; height: 32px; }
  .g-4 .stat .label { font-size: 11.5px; }
  .topbar { padding: 0 .75rem; }
  .hide-sm { display: none !important; }
  .stat .value { font-size: 1.1rem; }
}

/* ---------- Print ---------- */
@media print {
  .sidebar, .topbar, .no-print, .toasts { display: none !important; }
  .app { display: block; }
  body { background: #fff; }
  .content { padding: 0; max-width: none; }
  .card { box-shadow: none; border: 0; }
}