:root {
  --bg: #f3f6f8;
  --card: #ffffff;
  --ink: #142231;
  --muted: #64748b;
  --line: #e2e8ef;
  --brand: #0f8a6f;
  --brand-dark: #0b6b56;
  --brand-soft: #e6f5f0;
  --side: #0f2a35;
  --side-ink: #b8cbd3;
  --warn: #b45309;
  --warn-soft: #fef3c7;
  --danger: #b91c1c;
  --danger-soft: #fee2e2;
  --ok: #047857;
  --ok-soft: #d1fae5;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(15, 42, 53, .06), 0 2px 8px rgba(15, 42, 53, .04);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 14px/1.5 "Segoe UI", system-ui, -apple-system, Roboto, "Noto Sans", sans-serif; }
a { color: var(--brand-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { margin: 0; line-height: 1.25; }
h2 { font-size: 16px; }
.muted { color: var(--muted); }
.block { display: block; }
small { font-size: 12px; }

/* Shell */
.shell { display: flex; min-height: 100vh; }
.sidebar { width: 232px; flex: none; background: var(--side); color: var(--side-ink); display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; }
.brand { display: flex; gap: 10px; align-items: center; padding: 18px 16px; }
.brand strong { display: block; color: #fff; font-size: 15px; }
.brand small { color: var(--side-ink); }
.brand-mark { width: 36px; height: 36px; border-radius: 9px; background: var(--brand); color: #fff; display: grid; place-items: center; font-size: 24px; font-weight: 700; flex: none; }
.sidebar nav { flex: 1; overflow-y: auto; padding: 6px 10px; }
.sidebar nav a { display: flex; gap: 10px; align-items: center; padding: 9px 10px; border-radius: 8px; color: var(--side-ink); margin-bottom: 2px; }
.sidebar nav a:hover { background: rgba(255, 255, 255, .06); color: #fff; text-decoration: none; }
.sidebar nav a.active { background: var(--brand); color: #fff; }
.ico { width: 18px; height: 18px; flex: none; }
.side-user { display: flex; justify-content: space-between; align-items: center; padding: 14px 16px; border-top: 1px solid rgba(255, 255, 255, .08); }
.side-user strong { display: block; color: #fff; font-size: 13px; }
.side-user .icon-btn { color: var(--side-ink); }
.main { flex: 1; min-width: 0; }
.topbar { display: flex; align-items: center; gap: 12px; padding: 14px 24px; background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.topbar h1 { font-size: 18px; flex: 1; }
.menu-btn { display: none; background: none; border: 0; font-size: 22px; cursor: pointer; color: var(--ink); }
.content { padding: 20px 24px 40px; max-width: 1400px; }

/* Controls */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 8px 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); color: var(--ink); font: inherit; font-weight: 600; cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: #c9d4de; text-decoration: none; background: #f8fafc; }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); border-color: var(--brand-dark); }
.btn-danger { color: var(--danger); border-color: #f3c4c4; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-lg { padding: 12px 18px; font-size: 16px; }
.btn-block { width: 100%; }
.icon-btn { background: none; border: 0; cursor: pointer; padding: 4px; color: var(--muted); font-size: 15px; line-height: 1; }
.icon-btn:hover { color: var(--danger); }
input, select, textarea { font: inherit; color: inherit; padding: 8px 10px; border: 1px solid #cfd8e1; border-radius: 8px; background: #fff; width: 100%; min-width: 0; }
input:focus, select:focus, textarea:focus { outline: 2px solid rgba(15, 138, 111, .25); border-color: var(--brand); }
label { display: flex; flex-direction: column; gap: 4px; font-weight: 600; font-size: 13px; }
label small { font-weight: 400; color: var(--muted); }
.w-xs { width: 74px; }
.w-sm { width: 120px; }

/* Cards & layout */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; margin-bottom: 16px; }
.card.flush { padding: 0; overflow: hidden; }
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 12px; }
.card-head p { margin: 4px 0 0; }
.actions { display: flex; gap: 8px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.grid-2 .card { margin: 0; }
.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.toolbar p { margin: 0; max-width: 680px; }
.search { display: flex; gap: 8px; flex-wrap: wrap; }
.search input { width: auto; min-width: 150px; }
.search input[name=q] { min-width: 240px; }
.search select { width: auto; }
.form-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.span-2 { grid-column: span 2; }
.span-4 { grid-column: 1 / -1; }
.form-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 6px; }
.section-title { margin: 20px 0 10px; font-size: 15px; }
.totals-line { text-align: right; margin: 12px 0; font-size: 15px; }
.pager { display: flex; gap: 12px; align-items: center; justify-content: center; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-bottom: 16px; }
.stats-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); color: var(--ink); border-top: 3px solid var(--brand); }
.stat:hover { text-decoration: none; }
.stat span { display: block; color: var(--muted); font-size: 13px; }
.stat strong { display: block; font-size: 24px; margin: 2px 0; font-variant-numeric: tabular-nums; }
.stat small { color: var(--muted); }
.stat-warn { border-top-color: #f59e0b; }
.stat-danger { border-top-color: var(--danger); }

/* Tables */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; }
.table th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); font-weight: 600; background: #f8fafc; }
.table th, .table td { padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.table tbody tr:hover, .table tr:hover td { background: #fafcfd; }
.table tfoot td { background: #f8fafc; font-weight: 600; }
.table.compact td, .table.compact th { padding: 8px 4px; }
.card .table.compact tr:last-child td { border-bottom: 0; }
.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.row-void td { opacity: .55; text-decoration: line-through; }
.row-void td:last-child, .row-void td:nth-last-child(2) { text-decoration: none; }
.entry-table td { padding: 6px 8px; }
.entry-table input, .entry-table select { padding: 6px 8px; }
#billRows select { min-width: 220px; }
#purchaseRows select { min-width: 78px; }
#purchaseRows .w-sm { width: 100px; }
#purchaseRows input[type=month] { width: 150px; }
.w-med { min-width: 240px; }
.inline-form { display: flex; gap: 6px; align-items: center; }
.inline-form select { width: auto; max-width: 190px; }
.empty { color: var(--muted); padding: 18px; text-align: center; margin: 0; }

.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; background: #eef2f6; color: #334155; white-space: nowrap; }
.tag-ok { background: var(--ok-soft); color: var(--ok); }
.tag-warn { background: var(--warn-soft); color: var(--warn); }
.tag-danger { background: var(--danger-soft); color: var(--danger); }
h2 .tag { vertical-align: middle; margin-left: 6px; }

.alert { padding: 10px 14px; border-radius: 8px; margin-bottom: 12px; font-weight: 500; }
.alert-ok { background: var(--ok-soft); color: #065f46; }
.alert-err { background: var(--danger-soft); color: #991b1b; }

.tabs { display: flex; gap: 4px; background: #e8edf2; padding: 4px; border-radius: 9px; flex-wrap: wrap; }
.tabs a { padding: 6px 12px; border-radius: 7px; color: var(--muted); font-weight: 600; }
.tabs a.active { background: #fff; color: var(--ink); box-shadow: var(--shadow); }
.tabs a:hover { text-decoration: none; color: var(--ink); }

.facts { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; margin: 0; }
.facts div { background: #f8fafc; border-radius: 8px; padding: 10px 12px; }
.facts dt { color: var(--muted); font-size: 12px; }
.facts dd { margin: 2px 0 0; font-weight: 600; }

/* Weekly bars */
.bars { display: flex; align-items: flex-end; gap: 10px; height: 190px; padding-top: 10px; }
.bar-col { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; height: 100%; gap: 4px; }
.bar { width: 100%; max-width: 46px; background: var(--brand); border-radius: 6px 6px 2px 2px; min-height: 2px; height: 0; transition: height .4s; }
.bar-val { font-size: 11px; color: var(--muted); }
.bar-col small { color: var(--muted); }

/* Autocomplete */
.ac { position: relative; }
.ac-list { position: absolute; left: 0; right: 0; top: 100%; z-index: 20; background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 8px 24px rgba(15, 42, 53, .14); max-height: 340px; overflow-y: auto; display: none; margin-top: 4px; min-width: 320px; }
.ac-list.open { display: block; }
.ac-item { padding: 9px 12px; cursor: pointer; border-bottom: 1px solid #f1f4f7; display: flex; justify-content: space-between; gap: 12px; }
.ac-item:last-child { border-bottom: 0; }
.ac-item.hl, .ac-item:hover { background: var(--brand-soft); }
.ac-item small { display: block; color: var(--muted); }
.ac-item.disabled { opacity: .5; }
.ac-big input { font-size: 16px; padding: 12px 14px; }
.ac-big { margin-bottom: 14px; }

/* POS */
.pos { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 16px; align-items: start; }
.pos .card { margin: 0; }
.pos-side { position: sticky; top: 76px; display: flex; flex-direction: column; gap: 10px; }
.sum { border-top: 1px solid var(--line); padding-top: 10px; display: flex; flex-direction: column; gap: 6px; }
.sum div { display: flex; justify-content: space-between; align-items: center; }
.sum span { color: var(--muted); }
.sum b { font-variant-numeric: tabular-nums; }
.sum-total { border-top: 1px dashed var(--line); padding-top: 8px; font-size: 20px; }
.sum-total span { color: var(--ink); font-weight: 600; }
.pay-modes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.chip { cursor: pointer; }
.chip input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.chip span { display: block; text-align: center; padding: 8px 4px; border: 1px solid var(--line); border-radius: 8px; font-weight: 600; }
.chip input:checked + span { background: var(--brand-soft); border-color: var(--brand); color: var(--brand-dark); }
.chip input:focus-visible + span { outline: 2px solid var(--brand); }
.rx-flag { color: var(--danger); font-size: 11px; font-weight: 700; margin-left: 4px; }
.qty-hint { display: block; color: var(--muted); font-size: 11px; font-weight: 400; }

/* AI bill scan */
.scan-card { border-color: #b7e4d6; background: linear-gradient(180deg, #f3fbf8, #fff); }
.scan-intro { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 14px; }
.scan-intro p { margin: 4px 0 0; max-width: 760px; }
.scan-icon { width: 42px; height: 42px; border-radius: 10px; background: var(--brand); color: #fff; display: grid; place-items: center; font-weight: 800; flex: none; }
.scan-drop { position: relative; display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 22px; border: 2px dashed #9fd6c4; border-radius: 12px; cursor: pointer; text-align: center; background: #fff; }
.scan-drop:hover, .scan-drop.over { border-color: var(--brand); background: var(--brand-soft); }
.scan-drop.busy { opacity: .6; pointer-events: none; }
.scan-drop input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.scan-drop strong { font-size: 16px; color: var(--brand-dark); }
.scan-drop small { color: var(--muted); font-weight: 400; }
.scan-status { margin-top: 12px; padding: 10px 14px; border-radius: 8px; }
.scan-status.busy { background: #eef6ff; color: #1e3a8a; }
.scan-status.ok { background: var(--ok-soft); color: #065f46; }
.scan-status.err { background: var(--danger-soft); color: #991b1b; }
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -2px; margin-right: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }
.scan-warnings { margin-top: 14px; padding: 10px 14px; border-radius: 8px; background: var(--warn-soft); color: #78350f; }
.scan-warnings ul { margin: 4px 0 0; padding-left: 18px; }
.scan-check { font-size: 13px; font-weight: 600; padding: 6px 8px; border-radius: 6px; }
.scan-check.ok { background: var(--ok-soft); color: var(--ok); }
.scan-check.bad { background: var(--danger-soft); color: var(--danger); }
.new-supplier { background: var(--warn-soft); border-radius: 8px; padding: 12px; }
.new-med { margin-top: 4px; font-size: 12px; }
.nm-fields { display: block; margin-top: 4px; color: var(--muted); }
.nm-fields input { padding: 3px 6px; width: 60px; }
.purchase-foot { display: flex; justify-content: space-between; gap: 24px; align-items: flex-start; margin: 14px 0; flex-wrap: wrap; }
.pay-now { display: flex; gap: 12px; flex-wrap: wrap; max-width: 520px; }
.pay-now label { flex: 1 1 180px; }
.purchase-sum { min-width: 280px; border-top: 0; padding-top: 0; }
label.check { flex-direction: row; align-items: center; gap: 8px; align-self: end; padding-bottom: 10px; }
label.check input { width: auto; }

/* Supplier account */
.ledger-top { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 16px; align-items: start; }
.ledger-top aside { display: flex; flex-direction: column; gap: 16px; }
.pay-form { display: flex; flex-direction: column; gap: 10px; margin: 0; }
.stat-inline { padding: 8px 14px; }
.stat-inline strong { font-size: 20px; }

/* Auth */
.auth-page { display: grid; place-items: center; min-height: 100vh; padding: 16px; background: linear-gradient(160deg, #0f2a35, #0f8a6f); }
.auth-card { background: #fff; padding: 28px; border-radius: 14px; width: 100%; max-width: 380px; display: flex; flex-direction: column; gap: 14px; box-shadow: 0 20px 50px rgba(0, 0, 0, .25); }
.auth-card h1 { font-size: 20px; }
.demo-box { border-top: 1px dashed var(--line); padding-top: 14px; }
.demo-box p { margin: 0 0 8px; text-align: center; color: var(--muted); font-size: 13px; }
.demo-box div { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.demo-banner { background: var(--warn-soft); color: var(--warn); text-align: center; font-size: 13px; padding: 6px 12px; }
.demo-banner a { color: inherit; font-weight: 700; text-decoration: underline; }
.brand-center { padding: 0 0 6px; }
.brand-center strong { color: var(--ink); }
.brand-center small { color: var(--muted); }

/* Invoice */
.invoice-page { background: #e9eef2; }
.invoice-bar { display: flex; gap: 8px; justify-content: center; padding: 14px; }
.invoice { position: relative; background: #fff; max-width: 820px; margin: 0 auto 30px; padding: 26px 30px; box-shadow: var(--shadow); font-size: 13px; }
.inv-head { display: flex; justify-content: space-between; gap: 20px; border-bottom: 2px solid var(--ink); padding-bottom: 10px; }
.inv-head h1 { font-size: 22px; color: var(--brand-dark); }
.inv-head p, .inv-meta p { margin: 2px 0; }
.inv-ids { text-align: right; }
.inv-title { text-align: center; font-weight: 700; letter-spacing: .2em; margin: 8px 0; }
.inv-meta { display: flex; justify-content: space-between; gap: 20px; border: 1px solid var(--line); padding: 8px 12px; border-radius: 6px; }
.inv-table, .inv-gst { width: 100%; border-collapse: collapse; margin-top: 12px; }
.inv-table th, .inv-table td, .inv-gst th, .inv-gst td { border-bottom: 1px solid var(--line); padding: 6px; text-align: left; }
.inv-table th, .inv-gst th { background: #f3f6f8; font-size: 12px; }
.inv-table .num, .inv-gst .num { text-align: right; }
.inv-foot { display: flex; justify-content: space-between; gap: 30px; align-items: flex-start; }
.inv-gst { max-width: 380px; }
.inv-totals { min-width: 250px; margin-top: 12px; }
.inv-totals div { display: flex; justify-content: space-between; padding: 3px 0; }
.inv-totals .grand { border-top: 2px solid var(--ink); margin-top: 4px; padding-top: 6px; font-size: 17px; }
.inv-totals .saved { justify-content: flex-end; color: var(--ok); font-weight: 600; }
.inv-words { font-style: italic; margin: 14px 0 0; }
.inv-end { display: flex; justify-content: space-between; gap: 20px; margin-top: 24px; font-size: 12px; color: var(--muted); }
.inv-end .sign { text-align: right; color: var(--ink); }
.void { position: absolute; top: 40%; left: 50%; transform: translate(-50%, -50%) rotate(-20deg); font-size: 80px; font-weight: 800; color: rgba(185, 28, 28, .15); pointer-events: none; }

@media print {
  .no-print { display: none !important; }
  body, .invoice-page { background: #fff; }
  .invoice { box-shadow: none; margin: 0; max-width: none; padding: 0; }
  @page { margin: 10mm; }
}

/* Responsive */
@media (max-width: 1100px) {
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pos, .ledger-top { grid-template-columns: minmax(0, 1fr); }
  .pos-side { position: static; }
}
@media (max-width: 860px) {
  .sidebar { position: fixed; left: 0; top: 0; z-index: 30; transform: translateX(-100%); transition: transform .2s; }
  .sidebar.open { transform: none; box-shadow: 0 0 0 100vmax rgba(0, 0, 0, .35); }
  .menu-btn { display: block; }
  .grid-2 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr 1fr; }
  .span-2 { grid-column: 1 / -1; }
  .content { padding: 16px; }
  .topbar { padding: 12px 16px; }
}
@media (max-width: 560px) {
  .stats, .stats-3 { grid-template-columns: 1fr 1fr; }
  .stat strong { font-size: 19px; }
  .form-grid { grid-template-columns: 1fr; }
  .search input, .search input[name=q], .search select { min-width: 0; flex: 1 1 140px; }
  .topbar-cta { display: none; }
  .inv-head, .inv-meta, .inv-foot { flex-direction: column; }
  .inv-ids { text-align: left; }
  .invoice { padding: 16px; }
}