:root {
  --green: #16a34a;        /* เขียวหลัก */
  --green-soft: #22c55e;   /* เขียวสว่าง */
  --green-dark: #15803d;   /* เขียวเข้ม */
  --mint: #e9f9ef;         /* เขียวอ่อนพื้นหลัง */
  --mint-2: #d6f2e0;
  --red: #ef4444;
  --amber: #f59e0b;
  --gray: #6b7280;
  --bg: #f2fbf6;
  --card: #ffffff;
  --text: #1f3a2b;
  --shadow: 0 4px 14px rgba(22,163,74,.10);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

/* พื้นหลังนอกกรอบแอป (เห็นตอนเปิดบนคอมจอกว้าง) */
html { background: var(--mint-2); }

/* กรอบแอป — มือถือเต็มจอ, คอมกว้างสุด 640px จัดกลาง เหมือนเปิดในมือถือ */
body {
  margin: 0 auto;
  max-width: 640px;
  min-height: 100vh;
  font-family: -apple-system, "Segoe UI", "Sarabun", sans-serif;
  background: linear-gradient(180deg, var(--mint) 0%, var(--bg) 220px);
  color: var(--text);
  padding-bottom: 84px;
  box-shadow: 0 0 40px rgba(0,0,0,.06);
}
.btn:disabled { opacity: .45; }

h1 { font-size: 1.45rem; margin: 14px 16px 4px; display: flex; align-items: center; gap: 6px; }

/* หัวหน้า + ปุ่มมุมขวาบน (กันพลาด) */
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding-right: 16px; }
.page-head h1 { margin-bottom: 4px; }
h2 { font-size: 1.05rem; margin: 18px 16px 8px; color: var(--green-dark); }

.page { padding: 8px 0 16px; }
.hidden { display: none !important; }

/* แถบเน็ต */
.net-bar {
  position: sticky; top: 0; z-index: 20;
  text-align: center; font-size: 0.8rem; padding: 5px; font-weight: 600;
  background: var(--green-soft); color: #fff;
}
.net-bar.offline { background: var(--gray); }

/* ปุ่ม */
.btn {
  border: none; border-radius: 14px; padding: 11px 16px;
  font-size: 1rem; font-weight: 700; cursor: pointer; background: var(--mint-2); color: var(--green-dark);
  transition: transform .08s;
}
.btn-primary { background: var(--green); color: #fff; box-shadow: var(--shadow); }
.btn-scan { background: var(--green-dark); color: #fff; }
.btn-ghost { background: #fff; color: var(--green-dark); border: 1.5px solid var(--mint-2); }
.btn-lg { width: calc(100% - 32px); margin: 12px 16px; padding: 17px; font-size: 1.15rem; border-radius: 18px; }
.btn:active { transform: scale(0.96); }

/* input */
input, select {
  font-size: 1rem; padding: 11px; border: 1.5px solid var(--mint-2);
  border-radius: 12px; width: 100%; background: #fff; color: var(--text);
}
input:focus, select:focus { outline: none; border-color: var(--green-soft); }

/* POS */
.pos-search { display: flex; gap: 8px; padding: 0 16px; }
.pos-search input { flex: 1; }
.pos-results { padding: 0 16px; max-height: 42vh; overflow-y: auto; }
.pos-item {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--card); padding: 13px; border-radius: 16px; margin: 8px 0; box-shadow: var(--shadow);
}
.pos-item small { color: var(--gray); }

.scanner-box { padding: 12px 16px; text-align: center; }
.scanner-box video { width: 100%; max-width: 360px; border-radius: 16px; background: #000; }

/* ตะกร้า */
.cart { padding: 0 16px; }
.cart-row {
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
  background: var(--card); padding: 12px; border-radius: 16px; margin: 8px 0; box-shadow: var(--shadow);
}
.cart-info { flex: 1; min-width: 0; }
.cart-info small { color: var(--gray); }
.cart-row .qty { display: flex; align-items: center; gap: 6px; }
.cart-row .qty button {
  width: 36px; height: 36px; border-radius: 12px; border: none;
  background: var(--mint-2); color: var(--green-dark); font-size: 1.3rem; font-weight: 800;
}
.cart-row .qty-input {
  width: 48px; text-align: center; padding: 8px 2px; font-weight: 700; font-size: 1rem;
}
.cart-del { background: none; border: none; font-size: 1.2rem; padding: 4px; cursor: pointer; }

/* สรุปยอดบิล */
.cart-summary {
  margin: 10px 16px 0; background: var(--card); border-radius: 18px;
  padding: 14px 16px; box-shadow: var(--shadow);
}
.sum-row { display: flex; justify-content: space-between; align-items: center; padding: 5px 0; }
.sum-row span:first-child { color: var(--gray); }
.sum-row input {
  width: 120px; text-align: right; padding: 8px 10px; font-weight: 700;
}
.sum-row.total { border-top: 1.5px dashed var(--mint-2); margin-top: 6px; padding-top: 12px; font-size: 1.25rem; font-weight: 800; }
.sum-row.total span:first-child { color: var(--text); }
.sum-row.total #cart-total { color: var(--green); }

/* สต๊อก */
.row-between { display: flex; gap: 8px; padding: 0 16px; align-items: center; }
.row-between input[type=text] { flex: 1; }
.stock-list { padding: 8px 16px; }
.stock-card {
  background: var(--card); padding: 14px; border-radius: 16px; margin: 9px 0; box-shadow: var(--shadow);
}
.stock-card .top { display: flex; justify-content: space-between; align-items: center; }
.stock-card .name { font-weight: 700; }
.stock-card .meta { color: var(--gray); font-size: 0.85rem; margin-top: 5px; }
.stock-card.low { border: 2px solid var(--amber); }
.badge-low { background: var(--amber); color: #fff; font-size: 0.7rem; padding: 2px 9px; border-radius: 20px; margin-left: 4px; }

.stock-alert { padding: 0 16px; }
.alert-item {
  background: #fff8ec; border: 1.5px solid var(--amber); color: #b45309;
  padding: 11px; border-radius: 14px; margin: 7px 16px; font-size: 0.9rem; font-weight: 600;
}

/* แดชบอร์ด */
.period-toggle {
  display: flex; gap: 6px; margin: 6px 16px; background: var(--mint-2);
  padding: 4px; border-radius: 14px;
}
.period-btn {
  flex: 1; border: none; background: none; padding: 9px 0; border-radius: 11px;
  font-size: 0.92rem; font-weight: 700; color: var(--green-dark); cursor: pointer;
}
.period-btn.active { background: #fff; color: var(--green); box-shadow: var(--shadow); }

.sold-list { padding: 4px 16px; }
.sold-row {
  display: flex; align-items: center; gap: 10px;
  background: var(--card); padding: 12px 14px; border-radius: 14px; margin: 7px 0; box-shadow: var(--shadow);
}
.sold-row .s-info { flex: 1; min-width: 0; }
.sold-row .s-name { font-weight: 600; display: block; }
.sold-row .s-sub { color: var(--gray); font-size: 0.78rem; }
.sold-row .s-total { color: var(--green); font-weight: 700; white-space: nowrap; }
.sold-empty { padding: 6px 16px; color: var(--gray); }

/* สรุปเงินทุน (ledger) */
.ledger { background: var(--card); margin: 4px 16px; border-radius: 18px; padding: 4px 16px; box-shadow: var(--shadow); }
.ledger-row {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  padding: 12px 0; border-bottom: 1px dashed var(--mint-2); font-size: 0.98rem;
}
.ledger-row:last-child { border-bottom: none; }
.ledger-row .lbl { font-weight: 600; }
.ledger-row .lbl small { display: block; color: var(--gray); font-size: 0.74rem; font-weight: 400; margin-top: 2px; }
.ledger-row .amt { font-weight: 800; font-size: 1.06rem; white-space: nowrap; }
.ledger-row.out .amt { color: var(--red); }
.ledger-row.in .amt { color: var(--green); }
.ledger-row.sub { padding: 8px 0 8px 16px; }
.ledger-row.sub .lbl { color: var(--gray); font-weight: 500; font-size: 0.9rem; }
.ledger-row.sub .amt { font-size: 0.98rem; color: var(--green-dark); }
.ledger-row.locked .amt { color: var(--amber); }

.dash-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; padding: 8px 16px; }
.dash-card { background: var(--card); padding: 16px; border-radius: 18px; box-shadow: var(--shadow); }
.dash-card .label { color: var(--gray); font-size: 0.85rem; }
.dash-card .value { font-size: 1.4rem; font-weight: 800; margin-top: 6px; color: var(--green-dark); }
.dash-card.profit .value { color: var(--green); }
.dash-card.loss .value { color: var(--red); }
.dash-card.spend .value { color: var(--red); }

/* กระเป๋าเงินทุนร้าน */
.wallet-card {
  margin: 8px 16px; padding: 18px; border-radius: 20px; color: #fff;
  background: linear-gradient(135deg, var(--green) 0%, var(--green-dark) 100%);
  box-shadow: 0 8px 20px rgba(22,163,74,.28);
}
.wallet-top { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.wallet-top span { opacity: .9; font-size: 0.9rem; }
.wallet-top b { font-size: 1.7rem; font-weight: 800; white-space: nowrap; }
.wallet-sub { margin-top: 12px; display: grid; gap: 5px; font-size: 0.82rem; }
.wallet-sub .w-line { display: flex; justify-content: space-between; opacity: .92; }
.wallet-sub .w-line.pull { font-weight: 700; opacity: 1; border-top: 1px solid rgba(255,255,255,.25); padding-top: 6px; margin-top: 2px; }

/* ฟอร์ม */
.form-card {
  background: var(--card); margin: 8px 16px; padding: 14px;
  border-radius: 18px; display: flex; flex-direction: column; gap: 12px; box-shadow: var(--shadow);
}
.form-card label {
  display: block; font-size: 0.82rem; font-weight: 700; color: var(--green-dark);
}
.form-card label input, .form-card label select { margin-top: 5px; font-weight: 400; color: var(--text); }

/* ประวัติการเบิก / ใส่ทุน */
.history-list { padding: 2px 16px; }
.history-row {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  background: var(--card); padding: 12px 14px; border-radius: 14px; margin: 7px 0; box-shadow: var(--shadow);
}
.history-row .h-info { flex: 1; min-width: 0; }
.history-row .h-title { font-weight: 700; font-size: 0.92rem; }
.history-row .h-meta { color: var(--gray); font-size: 0.78rem; margin-top: 2px; }
.history-row .h-right { display: flex; align-items: center; gap: 10px; }
.history-row .h-amt { font-weight: 800; white-space: nowrap; }
.history-row.buy .h-amt { color: var(--red); }
.history-row.in .h-amt { color: var(--green); }
.h-del {
  border: 1.5px solid #fecaca; background: #fff5f5; color: var(--red);
  border-radius: 10px; padding: 6px 9px; font-size: 0.78rem; font-weight: 700; cursor: pointer; white-space: nowrap;
}
.h-del:active { transform: scale(0.95); }

/* เติมของ — พรีวิวทุนเฉลี่ย */
.restock-name { margin: 0 0 10px; color: var(--gray); font-size: 0.9rem; }
.restock-preview {
  background: var(--mint); color: var(--green-dark); border-radius: 12px;
  padding: 10px 12px; font-size: 0.86rem; font-weight: 600; margin: 4px 0 0; min-height: 4px;
}
.restock-preview:empty { display: none; }
.restock-preview.warn { background: #fff8ec; color: #b45309; border: 1.5px solid var(--amber); }

.card-btns { display: flex; gap: 6px; }
.btn-sm { padding: 8px 11px; font-size: 0.85rem; }

/* เติมสต๊อกแบบเร็ว (ในการ์ดสินค้า) */
.quick-restock { display: flex; gap: 8px; margin-top: 11px; }
.quick-restock .qr-input { flex: 1; }
.stock-list { max-height: 68vh; overflow-y: auto; }

/* ตัดของเสีย/หมดอายุ */
.write-off { display: flex; gap: 8px; margin-top: 8px; }
.write-off .wo-input { flex: 1; }
.btn-danger { background: #fff5f5; color: var(--red); border: 1.5px solid #fecaca; }

/* modal */
.modal { position: fixed; inset: 0; background: rgba(21,58,43,.45); display: flex; align-items: flex-end; justify-content: center; z-index: 50; }
.modal-card {
  background: #fff; width: 100%; max-width: 640px; border-radius: 24px 24px 0 0;
  padding: 22px 18px; max-height: 90vh; overflow-y: auto;
}
.modal-card h2 { margin-top: 0; }
.modal-card label { display: block; margin: 10px 0; font-size: 0.9rem; color: var(--green-dark); font-weight: 600; }
.modal-card label input, .modal-card label select { margin-top: 5px; font-weight: 400; }
.modal-actions { display: flex; gap: 10px; margin-top: 18px; }
.modal-actions .btn { flex: 1; }

/* tabbar */
.tabbar {
  position: fixed; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 100%; max-width: 640px;
  display: flex; background: #fff; border-top: 1.5px solid var(--mint-2); z-index: 30;
  box-shadow: 0 -2px 12px rgba(22,163,74,.06);
}
.tab {
  flex: 1; border: none; background: none; padding: 9px 0; font-size: 1.45rem;
  color: var(--gray); display: flex; flex-direction: column; align-items: center; gap: 2px;
}
.tab span { font-size: 0.7rem; font-weight: 600; }
.tab.active { color: var(--green); }

/* toast */
.toast {
  position: fixed; bottom: 90px; left: 50%; transform: translateX(-50%);
  background: var(--green-dark); color: #fff; padding: 12px 22px; border-radius: 14px;
  font-size: 0.92rem; opacity: 0; transition: opacity .3s; z-index: 60; pointer-events: none;
  max-width: 90%; text-align: center; box-shadow: 0 6px 20px rgba(0,0,0,.2);
}
.toast.show { opacity: 1; }
.toast.warn { background: var(--red); }

/* ===== รายงานสรุป PDF (พิมพ์ 1 หน้า) ===== */
#print-report { display: none; }
.rpt { color: #111; font-family: "Sarabun", -apple-system, sans-serif; padding: 26px 30px; }
.rpt h2 { margin: 0; font-size: 20px; }
.rpt-sub { color: #444; font-size: 13px; margin: 3px 0 16px; }
.rpt h3 { font-size: 14px; margin: 16px 0 6px; border-bottom: 2px solid #16a34a; padding-bottom: 3px; color: #15803d; }
.rpt-tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.rpt-tbl td { padding: 6px 4px; border-bottom: 1px solid #eee; }
.rpt-tbl td.r { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.rpt-tbl tr.hl td { font-weight: 800; font-size: 16px; border-top: 2px solid #111; border-bottom: none; padding-top: 8px; }
.rpt-cash { display: grid; gap: 5px; margin-top: 14px; font-size: 14px; }
.rpt-cash > div { display: flex; justify-content: space-between; }
.rpt-cash .tot { border-top: 2px solid #16a34a; margin-top: 4px; padding-top: 7px; font-weight: 800; font-size: 16px; color: #15803d; }
.rpt-foot { margin-top: 20px; font-size: 11px; color: #888; text-align: right; }
.rpt-empty { color: #888; font-size: 13px; }

@media print {
  html, body { background: #fff; }
  body { max-width: none; box-shadow: none; margin: 0; padding: 0; }
  .page, .tabbar, .net-bar, .toast, .modal { display: none !important; }
  #print-report { display: block !important; }
}