*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #fff7ed;
  --surface: #ffffff;
  --surface2: #fff7ed;
  --border: #fed7aa;
  --accent: #ea580c;       /* orange — warm shop/retail feel */
  --accent2: #c2410c;
  --accent-light: #fff7ed;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --text: #1c1917;
  --muted: #78716c;
  --label: #57534e;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 15px;
}

/* ── NAV ── */
.topbar {
  background: var(--accent);
  color: white;
  padding: 0 16px;
  height: 52px;
  display: flex;
  align-items: center;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.topbar-logo { font-size: 18px; font-weight: 800; letter-spacing: -0.5px; }
.topbar-logo span { opacity: .7; }
.topbar-shop { font-size: 13px; opacity: .85; margin-left: 4px; }
.topbar-spacer { flex: 1; }
.topbar-btn { background: rgba(255,255,255,.2); border: none; color: white; border-radius: 8px; padding: 6px 12px; font-size: 13px; cursor: pointer; }
.topbar-btn:hover { background: rgba(255,255,255,.3); }

/* ── BOTTOM NAV ── */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  z-index: 100;
  padding-bottom: env(safe-area-inset-bottom);
}
.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 4px 6px;
  cursor: pointer;
  color: var(--muted);
  font-size: 11px;
  gap: 3px;
  border: none;
  background: none;
  transition: color .15s;
}
.nav-item.active { color: var(--accent); }
.nav-icon { font-size: 22px; line-height: 1; }

/* ── MAIN CONTENT ── */
.main { padding: 16px 16px 80px; max-width: 600px; margin: 0 auto; }

/* ── VIEWS ── */
.view { display: none; }
.view.active { display: block; }

/* ── DASHBOARD ── */
.stat-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 16px; }
.stat-label { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.stat-value { font-size: 22px; font-weight: 700; }
.stat-value.green { color: var(--success); }
.stat-value.orange { color: var(--accent); }
.stat-sub { font-size: 11px; color: var(--muted); margin-top: 2px; }

.section-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.section-title { font-size: 13px; font-weight: 700; color: var(--label); text-transform: uppercase; letter-spacing: .04em; }

.bill-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px; margin-bottom: 8px; }
.bill-card-top { display: flex; justify-content: space-between; align-items: flex-start; }
.bill-no { font-weight: 700; font-size: 14px; }
.bill-time { font-size: 11px; color: var(--muted); }
.bill-amount { font-size: 16px; font-weight: 700; color: var(--success); }
.bill-items-count { font-size: 12px; color: var(--muted); margin-top: 2px; }

/* ── NEW BILL ── */
/* ── CUSTOMER BOX ── */
.customer-box { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; margin-bottom: 12px; }
.customer-toggle { display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-size: 14px; font-weight: 600; color: var(--label); }
.customer-toggle:hover { color: var(--accent); }

.search-box { position: relative; margin-bottom: 12px; }
.search-box input { width: 100%; padding: 12px 16px 12px 40px; border: 1px solid var(--border); border-radius: 12px; font-size: 15px; background: var(--surface); outline: none; }
.search-box input:focus { border-color: var(--accent); }
.search-icon { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); font-size: 18px; }
.search-results { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 12px; overflow: hidden; display: none; }
.search-result-item { padding: 12px 14px; display: flex; justify-content: space-between; align-items: center; cursor: pointer; border-bottom: 1px solid var(--border); }
.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--accent-light); }
.sri-name { font-weight: 600; font-size: 14px; }
.sri-price { color: var(--accent); font-weight: 700; }
.sri-stock { font-size: 11px; color: var(--muted); }

/* CART */
.cart-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; margin-bottom: 12px; overflow: hidden; }
.cart-header { padding: 12px 14px; border-bottom: 1px solid var(--border); font-weight: 700; font-size: 13px; color: var(--label); display: flex; justify-content: space-between; }
.cart-empty { padding: 32px; text-align: center; color: var(--muted); font-size: 14px; }
.cart-item { padding: 10px 14px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 10px; }
.cart-item:last-child { border-bottom: none; }
.ci-name { flex: 1; font-size: 14px; font-weight: 500; }
.ci-price { font-size: 12px; color: var(--muted); }
.qty-ctrl { display: flex; align-items: center; gap: 6px; }
.qty-btn { width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--border); background: var(--surface2); cursor: pointer; font-size: 16px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.qty-btn:hover { background: var(--accent); color: white; border-color: var(--accent); }
.qty-num { width: 28px; text-align: center; font-weight: 700; font-size: 15px; }
.ci-total { font-weight: 700; font-size: 14px; min-width: 60px; text-align: right; }
.ci-remove { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 18px; }
.ci-remove:hover { color: var(--danger); }

/* TOTALS */
.totals-box { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 14px; margin-bottom: 12px; }
.total-row { display: flex; justify-content: space-between; font-size: 14px; padding: 4px 0; }
.total-row.grand { font-weight: 800; font-size: 18px; border-top: 2px solid var(--border); margin-top: 8px; padding-top: 10px; }
.total-row.grand span:last-child { color: var(--accent); }

.bill-options-row { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.gst-toggle { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--label); cursor: pointer; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 8px 12px; flex: 1; min-width: 140px; }
.gst-toggle input[type=checkbox] { accent-color: var(--accent); width: 16px; height: 16px; flex-shrink: 0; }
.payment-btns { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.pay-btn { padding: 9px 4px; border-radius: 10px; border: 1.5px solid var(--border); background: var(--surface); font-size: 12px; font-weight: 700; cursor: pointer; color: var(--label); transition: all .15s; }
.pay-btn.active { background: var(--accent); color: white; border-color: var(--accent); }
.gst-pct { width: 50px; padding: 4px 8px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; }

.bill-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

/* ── PRODUCTS ── */
.fab { position: fixed; bottom: 76px; right: 16px; width: 52px; height: 52px; border-radius: 50%; background: var(--accent); color: white; border: none; font-size: 26px; cursor: pointer; box-shadow: 0 4px 16px rgba(234,88,12,.4); display: flex; align-items: center; justify-content: center; z-index: 99; }
.fab:hover { background: var(--accent2); }

.product-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px; margin-bottom: 8px; display: flex; align-items: center; gap: 12px; }
.pc-icon { width: 40px; height: 40px; border-radius: 10px; background: var(--accent-light); display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; }
.pc-info { flex: 1; }
.pc-name { font-weight: 700; font-size: 14px; }
.pc-price { color: var(--accent); font-weight: 600; font-size: 13px; }
.pc-stock { font-size: 12px; color: var(--muted); }
.pc-stock.low { color: var(--danger); font-weight: 600; }
.pc-actions { display: flex; gap: 6px; }
.pc-btn { padding: 5px 10px; border-radius: 8px; border: 1px solid var(--border); background: none; font-size: 12px; cursor: pointer; }
.pc-btn:hover { background: var(--accent-light); }

/* ── MODAL ── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 200; display: flex; align-items: flex-end; padding: 0; }
.modal-overlay.hidden { display: none; }
.modal { background: var(--surface); border-radius: 20px 20px 0 0; width: 100%; max-height: 90vh; overflow-y: auto; padding: 20px 20px 40px; }
.modal-drag { width: 36px; height: 4px; border-radius: 2px; background: var(--border); margin: 0 auto 16px; }
.modal-title { font-size: 17px; font-weight: 700; margin-bottom: 16px; }
.modal-close { float: right; background: none; border: none; font-size: 22px; cursor: pointer; color: var(--muted); margin-top: -2px; }

/* FIELD */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12px; font-weight: 600; color: var(--label); margin-bottom: 5px; }
.field input, .field select { width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 10px; font-size: 15px; background: var(--surface2); outline: none; }
.field input:focus, .field select:focus { border-color: var(--accent); background: white; }
.half { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

/* BUTTONS */
.btn { padding: 13px 20px; border: none; border-radius: 12px; font-size: 15px; font-weight: 700; cursor: pointer; width: 100%; }
.btn-orange { background: var(--accent); color: white; }
.btn-orange:hover { background: var(--accent2); }
.btn-outline { background: none; border: 2px solid var(--border); color: var(--label); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-green { background: var(--success); color: white; }
.btn-green:hover { background: #15803d; }

/* RECEIPT MODAL */
.receipt { font-family: 'Courier New', monospace; font-size: 13px; padding: 8px; }
.receipt-shop { text-align: center; margin-bottom: 12px; }
.receipt-shop h2 { font-size: 16px; font-weight: 700; }
.receipt-divider { border: none; border-top: 1px dashed #aaa; margin: 8px 0; }
.receipt-row { display: flex; justify-content: space-between; }
.receipt-item { display: flex; justify-content: space-between; padding: 2px 0; }
.receipt-total { font-weight: 700; font-size: 15px; }
.receipt-footer { text-align: center; margin-top: 12px; font-size: 11px; color: var(--muted); }

/* PRINT */
@media print {
  body * { visibility: hidden; }
  .print-area, .print-area * { visibility: visible; }
  .print-area { position: absolute; top: 0; left: 0; width: 80mm; }
}

.empty-state { text-align: center; padding: 40px 20px; color: var(--muted); }
.empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-text { font-size: 15px; margin-bottom: 6px; }
.empty-sub { font-size: 13px; }