:root {
  --bg: #F5F6F2;
  --panel: #FFFFFF;
  --ink: #1F2A24;
  --ink-soft: #5B6B62;
  --line: #DDE3DB;
  --accent: #1E6E4F;
  --accent-dark: #154F39;
  --accent-soft: #E4F1EA;
  --warn: #B8562F;
  --warn-soft: #FBEAE1;
  --radius: 8px;
  --shadow: 0 1px 2px rgba(31,42,36,0.06), 0 2px 8px rgba(31,42,36,0.04);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
}

input, select, button { font-family: inherit; font-size: inherit; }

/* ---------- Login ---------- */
#login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, var(--accent-dark), var(--accent) 60%, #2E8A62);
}
.login-card {
  background: var(--panel);
  padding: 40px 36px;
  border-radius: 12px;
  width: 340px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}
.login-card h1 { margin: 0 0 4px; font-size: 24px; letter-spacing: -0.02em; }
.login-card .sub { margin: 0 0 24px; color: var(--ink-soft); font-size: 13px; }
.login-card label { display: block; font-size: 12px; color: var(--ink-soft); margin: 14px 0 4px; }
.login-card input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line);
  border-radius: 6px; outline: none;
}
.login-card input:focus { border-color: var(--accent); }
.login-card button {
  width: 100%; margin-top: 20px; padding: 11px; background: var(--accent);
  color: white; border: none; border-radius: 6px; font-weight: 600; cursor: pointer;
}
.login-card button:hover { background: var(--accent-dark); }
.login-card .hint { margin: 16px 0 0; font-size: 11px; color: var(--ink-soft); text-align: center; }
.error-msg { color: var(--warn); font-size: 12px; min-height: 16px; margin-top: 6px; }

/* ---------- App shell ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--accent-dark); color: white; padding: 0 20px; height: 56px;
}
.brand { font-weight: 700; font-size: 16px; }
.tabs { display: flex; gap: 4px; }
.tab-btn {
  background: transparent; border: none; color: rgba(255,255,255,0.75);
  padding: 8px 16px; border-radius: 6px; cursor: pointer; font-weight: 500;
}
.tab-btn:hover { background: rgba(255,255,255,0.08); color: white; }
.tab-btn.active { background: rgba(255,255,255,0.16); color: white; }
.user-area { display: flex; align-items: center; gap: 12px; font-size: 13px; }
#logout-btn {
  background: rgba(255,255,255,0.12); border: none; color: white;
  padding: 6px 12px; border-radius: 6px; cursor: pointer;
}
#logout-btn:hover { background: rgba(255,255,255,0.22); }

.tab-panel { display: none; padding: 20px; max-width: 1400px; margin: 0 auto; }
.tab-panel.active { display: block; }

/* ---------- POS ---------- */
.pos-layout { display: grid; grid-template-columns: 1fr 320px; gap: 20px; align-items: start; }
.scan-row input {
  width: 100%; padding: 14px 16px; font-size: 16px; border: 2px solid var(--accent);
  border-radius: 8px; outline: none; background: var(--panel);
}
.search-results {
  margin-top: 4px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 8px; max-height: 220px; overflow-y: auto; display: none;
}
.search-results.show { display: block; }
.search-item {
  padding: 10px 14px; cursor: pointer; display: flex; justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.search-item:last-child { border-bottom: none; }
.search-item:hover { background: var(--accent-soft); }
.search-item .si-stock { color: var(--ink-soft); font-size: 12px; }

.cart-wrap {
  margin-top: 16px; background: var(--panel); border-radius: 10px;
  box-shadow: var(--shadow); min-height: 320px;
}
.cart-table { width: 100%; border-collapse: collapse; }
.cart-table th {
  text-align: left; padding: 10px 14px; font-size: 12px; color: var(--ink-soft);
  border-bottom: 1px solid var(--line); font-weight: 600;
}
.cart-table td { padding: 10px 14px; border-bottom: 1px solid var(--line); }
.cart-table tr:last-child td { border-bottom: none; }
.cart-table input[type=number] { width: 60px; padding: 4px 6px; border: 1px solid var(--line); border-radius: 4px; }
.remove-item-btn { background: none; border: none; color: var(--warn); cursor: pointer; font-size: 16px; }
.empty-cart { text-align: center; color: var(--ink-soft); padding: 40px 0; }

.pos-right {
  background: var(--panel); border-radius: 10px; padding: 20px; box-shadow: var(--shadow);
}
.pos-right h3 { margin: 0 0 14px; font-size: 15px; }
.summary-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 0; font-size: 13px; color: var(--ink-soft);
}
.summary-row input, .summary-row select {
  width: 100px; padding: 5px 8px; border: 1px solid var(--line); border-radius: 5px; text-align: right;
}
.total-row {
  font-size: 18px; font-weight: 700; color: var(--ink);
  border-top: 1px solid var(--line); margin-top: 6px; padding-top: 12px;
}
.pos-right label { display: block; font-size: 12px; color: var(--ink-soft); margin: 12px 0 4px; }
.pos-right select, .pos-right > input[type=number] {
  width: 100%; padding: 9px 10px; border: 1px solid var(--line); border-radius: 6px;
}
.primary-btn {
  width: 100%; margin-top: 16px; padding: 12px; background: var(--accent); color: white;
  border: none; border-radius: 8px; font-weight: 700; font-size: 14px; cursor: pointer;
}
.primary-btn:hover { background: var(--accent-dark); }
.primary-btn:disabled { background: #9DB5AA; cursor: not-allowed; }
.secondary-btn {
  width: 100%; margin-top: 8px; padding: 10px; background: transparent; color: var(--ink-soft);
  border: 1px solid var(--line); border-radius: 8px; cursor: pointer; font-weight: 600;
}
.secondary-btn:hover { background: var(--bg); }
.msg { margin-top: 10px; font-size: 13px; min-height: 18px; }
.msg.success { color: var(--accent); }
.msg.error { color: var(--warn); }

/* ---------- Inventory / Sales tables ---------- */
.inv-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 10px; }
.inv-actions { display: flex; gap: 10px; align-items: center; }
.inv-actions input[type=text] { padding: 9px 12px; border: 1px solid var(--line); border-radius: 6px; width: 220px; }
.checkbox-label { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-soft); }

.data-table { width: 100%; border-collapse: collapse; background: var(--panel); border-radius: 10px; overflow: hidden; box-shadow: var(--shadow); }
.data-table th {
  text-align: left; padding: 12px 14px; background: var(--accent-soft); color: var(--accent-dark);
  font-size: 12px; font-weight: 700; border-bottom: 1px solid var(--line);
}
.data-table td { padding: 11px 14px; border-bottom: 1px solid var(--line); font-size: 13px; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: #FAFBF9; }
.low-stock-row td { background: var(--warn-soft); }
.row-actions button {
  background: none; border: none; cursor: pointer; color: var(--accent); font-size: 12px; font-weight: 600; margin-right: 10px;
}
.row-actions button.danger { color: var(--warn); }
.status-badge { padding: 2px 8px; border-radius: 20px; font-size: 11px; font-weight: 700; }
.status-badge.completed { background: var(--accent-soft); color: var(--accent-dark); }
.status-badge.voided { background: var(--warn-soft); color: var(--warn); }

/* ---------- Dashboard ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat-card { background: var(--panel); border-radius: 10px; padding: 18px; box-shadow: var(--shadow); }
.stat-label { font-size: 12px; color: var(--ink-soft); margin-bottom: 6px; }
.stat-value { font-size: 24px; font-weight: 700; color: var(--accent-dark); }

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(20,30,25,0.45);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal {
  background: var(--panel); border-radius: 12px; padding: 28px; width: 420px;
  max-height: 90vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.modal h3 { margin: 0 0 18px; }
.modal label { display: block; font-size: 12px; color: var(--ink-soft); margin: 12px 0 4px; }
.modal input, .modal select {
  width: 100%; padding: 9px 10px; border: 1px solid var(--line); border-radius: 6px; outline: none;
}
.modal input:focus, .modal select:focus { border-color: var(--accent); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.cat-row { display: flex; gap: 8px; }
.cat-row select { flex: 1; }
.cat-row button { padding: 0 12px; border: 1px solid var(--line); background: var(--bg); border-radius: 6px; cursor: pointer; }
.modal-actions { display: flex; gap: 10px; margin-top: 22px; }
.modal-actions button { flex: 1; margin: 0; }

.receipt-modal { width: 320px; font-family: 'Courier New', monospace; }
#receipt-content { font-size: 12px; line-height: 1.6; }
#receipt-content .r-title { text-align: center; font-weight: 700; font-size: 14px; margin-bottom: 2px; }
#receipt-content .r-sub { text-align: center; font-size: 11px; color: var(--ink-soft); margin-bottom: 10px; }
#receipt-content hr { border: none; border-top: 1px dashed var(--line); margin: 8px 0; }
#receipt-content .r-line { display: flex; justify-content: space-between; }
#receipt-content .r-total { font-weight: 700; font-size: 13px; }

@media print {
  body * { visibility: hidden; }
  .receipt-modal, .receipt-modal * { visibility: visible; }
  .receipt-modal { position: absolute; top: 0; left: 0; box-shadow: none; }
  .modal-actions { display: none; }
}

@media (max-width: 900px) {
  .pos-layout { grid-template-columns: 1fr; }
  .tabs { display: none; }
}

/* ---------- New feature additions ---------- */
.optional-tag { font-weight: 400; color: var(--ink-soft); font-size: 11px; }
.small-btn { width: auto !important; margin: 0 !important; padding: 8px 14px !important; display: inline-block; }
.section-gap { margin-top: 28px; }
.tab-btn.admin-only.hidden-role { display: none; }
button.admin-only.hidden-role { display: none; }

.report-filters { display: flex; align-items: end; gap: 16px; margin-bottom: 18px; }
.report-filters label { display: flex; flex-direction: column; font-size: 12px; color: var(--ink-soft); gap: 4px; }
.report-filters input[type=date] { padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; }
.export-row { margin: 10px 0 6px; }
.export-row a { text-decoration: none; }
.totals-row { font-weight: 700; padding: 10px 4px; color: var(--accent-dark); }

.po-modal, .labels-modal, .customer-detail-modal { width: 520px; }
.po-item-row { display: grid; grid-template-columns: 2fr 1fr 1fr auto; gap: 8px; margin-bottom: 8px; align-items: center; }
.po-item-row select, .po-item-row input { padding: 7px 8px; border: 1px solid var(--line); border-radius: 5px; }
.po-item-row button { background: none; border: none; color: var(--warn); cursor: pointer; font-size: 16px; }

.cd-stats { display: flex; gap: 24px; margin: 10px 0 16px; font-size: 14px; color: var(--ink-soft); }
.cd-stats strong { color: var(--ink); font-size: 16px; }
.cd-payment-row { display: flex; gap: 8px; margin-bottom: 18px; }
.cd-payment-row input { flex: 1; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; }
.small-table th, .small-table td { padding: 7px 10px; font-size: 12px; }

.labels-modal { width: 460px; }
#labels-sheet {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px; max-height: 400px; overflow-y: auto;
  padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: #fff;
}
.label-item { border: 1px dashed var(--line); border-radius: 4px; padding: 8px; text-align: center; }
.label-item .label-name { font-size: 11px; font-weight: 600; margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.label-item .label-price { font-size: 12px; font-weight: 700; color: var(--accent-dark); margin-top: 2px; }
.label-item svg { max-width: 100%; }

.expiring-row td { background: #FFF3CD; }

@media print {
  body * { visibility: hidden; }
  .labels-modal, .labels-modal * { visibility: visible; }
  .labels-modal { position: absolute; top: 0; left: 0; box-shadow: none; width: 100%; }
  .labels-modal .modal-actions { display: none; }
  #labels-sheet { max-height: none; overflow: visible; border: none; grid-template-columns: repeat(3, 1fr); }
}