/* ============================================================
   POS Web App – Stylesheet
   Background: ສີຂຽວ | Border: ສີສົ້ມ | Buttons: ສີແດງ / ຟ້າ / ເຫຼືອງ
   Main Menu Font: Phetsarath OT, 18px, Bold, ສີດຳ
   ============================================================ */

:root {
  --bg: #ffffff;
  --border-orange: #ff9800;
  --border-orange-dark: #f57c00;
  --btn-red: #d32f2f;
  --btn-red-dark: #b71c1c;
  --btn-blue: #1976d2;
  --btn-blue-dark: #0d47a1;
  --btn-yellow: #ffeb3b;
  --btn-yellow-dark: #fbc02d;
  --text-dark: #000000;
  --text-gray: #444444;
  --gray-light: #f5f5f5;
  --gray-mid: #e0e0e0;
  --font-main: "Phetsarath OT", "Phetsarath", "Noto Sans Lao", "Saysettha OT", sans-serif;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
  --radius: 8px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-dark);
  font-family: var(--font-main);
  line-height: 1.5;
  min-height: 100vh;
}

/* ---------------- Navigation ---------------- */
.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--border-orange);
  padding: 12px 20px;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

.nav-brand {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  gap: 12px;
  align-items: center;
}

.nav-link {
  color: #000 !important;
  text-decoration: none;
  font-family: var(--font-main);
  font-size: 18px;
  font-weight: 700;
  padding: 8px 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.15);
  transition: all 0.2s;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  background: #fff;
  border-color: #fff;
  color: var(--border-orange) !important;
}

/* Cart badge */
#cart-count {
  display: inline-block;
  background: var(--btn-red);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 10px;
  margin-left: 6px;
}

/* ---------------- Pages / Layout ---------------- */
.page { display: none; animation: fadeIn 0.3s; }
.page.active { display: block; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.container { max-width: 1100px; margin: 0 auto; padding: 20px; }

.section-title {
  font-family: var(--font-main);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 20px;
  border-left: 5px solid var(--border-orange);
  padding-left: 14px;
}

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-main);
  font-size: 15px;
  font-weight: 700;
  border: 2px solid var(--border-orange);
  border-radius: var(--radius);
  padding: 10px 18px;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-red { background: var(--btn-red); color: #fff; border-color: var(--btn-red-dark); }
.btn-red:hover:not(:disabled) { background: var(--btn-red-dark); transform: translateY(-1px); }

.btn-blue { background: var(--btn-blue); color: #fff; border-color: var(--btn-blue-dark); }
.btn-blue:hover:not(:disabled) { background: var(--btn-blue-dark); transform: translateY(-1px); }

.btn-yellow { background: var(--btn-yellow); color: #000; border-color: var(--btn-yellow-dark); }
.btn-yellow:hover:not(:disabled) { background: var(--btn-yellow-dark); transform: translateY(-1px); }

.btn-outline {
  background: transparent;
  color: var(--text-dark);
  border-color: var(--border-orange-dark);
}
.btn-outline:hover { background: var(--border-orange); color: #fff; }

.btn-group { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }

/* ---------------- Home / Product Grid ---------------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.product-card {
  border: 2px solid var(--border-orange);
  border-radius: var(--radius);
  background: #fff;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }

.product-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--gray-mid);
  background: var(--gray-light);
  margin-bottom: 12px;
  cursor: pointer;
}

.product-card .name {
  font-family: var(--font-main);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.product-card .price {
  font-size: 16px;
  font-weight: 700;
  color: var(--btn-red);
  margin-bottom: 14px;
}

.product-card .stock {
  font-size: 13px;
  color: var(--text-gray);
  margin-bottom: 14px;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-gray);
}

/* ---------------- Product Detail ---------------- */
.detail-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: start;
}

.detail-image-box {
  border: 2px solid var(--border-orange);
  border-radius: var(--radius);
  padding: 16px;
  background: #fff;
  text-align: center;
}

.detail-image-box img {
  width: 100%;
  max-width: 420px;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--gray-mid);
  cursor: zoom-in;
  transition: transform 0.2s;
}

.detail-image-box img:hover { transform: scale(1.03); }

.zoom-hint { font-size: 13px; color: var(--text-gray); margin-top: 8px; }

.detail-info { display: flex; flex-direction: column; gap: 14px; }

.detail-info h1 {
  font-family: var(--font-main);
  font-size: 26px;
  font-weight: 700;
  color: var(--text-dark);
}

.detail-info .price {
  font-size: 22px;
  font-weight: 800;
  color: var(--btn-red);
}

.detail-info .stock {
  font-size: 14px;
  color: var(--text-gray);
  margin-bottom: 6px;
}

.detail-info .desc {
  font-size: 15px;
  color: var(--text-gray);
  line-height: 1.6;
}

.qty-control {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 2px solid var(--border-orange);
  border-radius: var(--radius);
  padding: 6px 12px;
  width: fit-content;
  background: #fff;
}

.qty-control button {
  background: transparent;
  border: none;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
  cursor: pointer;
  padding: 0 6px;
  line-height: 1;
}

.qty-control span { font-size: 16px; font-weight: 700; min-width: 24px; text-align: center; }

/* ---------------- Cart ---------------- */
.cart-items { display: flex; flex-direction: column; gap: 12px; margin-bottom: 20px; }

.cart-item {
  display: grid;
  grid-template-columns: 80px 1fr 120px 100px 100px;
  gap: 12px;
  align-items: center;
  border: 2px solid var(--border-orange);
  border-radius: var(--radius);
  padding: 12px;
  background: #fff;
}

.cart-item img {
  width: 70px; height: 70px; object-fit: cover; border-radius: 4px; border: 1px solid var(--gray-mid);
}

.cart-item .name { font-weight: 700; font-size: 15px; }
.cart-item .price { font-weight: 700; color: var(--btn-red); }

.qty-select {
  width: 60px;
  padding: 6px;
  border: 1px solid var(--border-orange);
  border-radius: 4px;
  font-family: var(--font-main);
  font-size: 14px;
}

.cart-summary {
  border: 2px solid var(--border-orange);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--gray-light);
}

.cart-summary .row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 15px;
}

.cart-summary .total {
  font-size: 20px;
  font-weight: 800;
  color: var(--btn-red);
  border-top: 2px solid var(--border-orange);
  padding-top: 12px;
  margin-top: 8px;
}

/* ---------------- Checkout ---------------- */
.form-card {
  border: 2px solid var(--border-orange);
  border-radius: var(--radius);
  padding: 24px;
  background: #fff;
  max-width: 560px;
  margin: 0 auto;
}

.form-group { margin-bottom: 18px; }

.form-group label {
  display: block;
  font-family: var(--font-main);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 2px solid var(--border-orange);
  border-radius: var(--radius);
  font-family: var(--font-main);
  font-size: 15px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { outline: none; border-color: var(--btn-blue); }

.loc-row { display: flex; gap: 10px; align-items: center; margin-top: 10px; }
.loc-row .btn { flex: 1; }

.map-box {
  border: 2px solid var(--border-orange);
  border-radius: var(--radius);
  padding: 12px;
  background: #fff;
  margin-top: 16px;
  text-align: center;
}

.map-box img { max-width: 100%; height: auto; border-radius: 6px; border: 1px solid var(--gray-mid); }

.map-note { font-size: 13px; color: var(--text-gray); margin-top: 8px; }

/* ---------------- Payment ---------------- */
.payment-card {
  border: 2px solid var(--border-orange);
  border-radius: var(--radius);
  padding: 24px;
  background: #fff;
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}

.payment-methods { display: flex; gap: 16px; justify-content: center; margin: 20px 0; flex-wrap: wrap; }

.method-box {
  border: 2px solid var(--border-orange);
  border-radius: var(--radius);
  padding: 16px;
  width: 240px;
  text-align: left;
}

.method-box h3 { margin-bottom: 10px; color: var(--text-dark); font-size: 17px; }

.qr-box { text-align: center; margin: 14px 0; }
.qr-box img { max-width: 220px; border: 1px solid var(--gray-mid); border-radius: 6px; background: #fff; padding: 8px; }

.slip-upload { margin-top: 14px; border-top: 1px solid var(--gray-mid); padding-top: 12px; text-align: left; }
.slip-upload input { margin-left: 8px; }

/* ---------------- Order Success ---------------- */
.success-card {
  border: 2px solid var(--border-orange);
  border-radius: var(--radius);
  padding: 40px 24px;
  background: #fff;
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}

.success-card .icon { font-size: 48px; margin-bottom: 16px; }
.success-card h2 { font-family: var(--font-main); font-size: 24px; font-weight: 700; margin-bottom: 12px; color: var(--text-dark); }
.success-card p { color: var(--text-gray); margin-bottom: 20px; }

.order-meta { text-align: left; margin: 20px 0; border: 1px solid var(--gray-mid); border-radius: 6px; padding: 14px; }
.order-meta .row { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 14px; }

/* ---------------- Admin ---------------- */
.admin-login {
  max-width: 400px; margin: 80px auto; padding: 20px;
  border: 2px solid var(--border-orange); border-radius: var(--radius); background: #fff;
  text-align: center;
}
.admin-login h2 { margin-bottom: 20px; color: var(--text-dark); }

.admin-tabs { display: flex; gap: 8px; margin-bottom: 20px; border-bottom: 2px solid var(--border-orange); }
.admin-tabs .tab {
  padding: 8px 16px; cursor: pointer; font-weight: 700; color: var(--text-gray);
  border: 2px solid transparent; border-bottom: none; border-radius: 6px 6px 0 0; background: var(--gray-light);
}
.admin-tabs .tab.active { color: var(--text-dark); border-color: var(--border-orange); border-bottom: 2px solid #fff; margin-bottom: -2px; }

table.admin-table {
  width: 100%; border-collapse: collapse; margin-top: 10px; background: #fff;
  border: 2px solid var(--border-orange); border-radius: var(--radius); overflow: hidden;
}
table.admin-table th,
table.admin-table td {
  border: 1px solid var(--gray-mid); padding: 10px 12px; text-align: left; font-size: 14px;
}
table.admin-table th { background: var(--border-orange); color: #fff; font-weight: 700; }
table.admin-table tr:nth-child(even) { background: var(--gray-light); }

.status-badge {
  padding: 4px 10px; border-radius: 12px; font-size: 12px; font-weight: 700; text-transform: uppercase;
}
.status-preparing { background: #fff3cd; color: #856404; border: 1px solid #ffeeba; }
.status-shipping { background: #cce5ff; color: #004085; border: 1px solid #b8daff; }
.status-delivered { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }

.admin-form { max-width: 600px; margin: 0 auto; border: 2px solid var(--border-orange); border-radius: var(--radius); padding: 20px; background: #fff; }
.admin-form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 14px; }
.admin-form .full { grid-column: 1 / -1; }
.admin-form img.preview { max-width: 150px; max-height: 150px; border: 1px solid var(--gray-mid); border-radius: 6px; margin-top: 8px; display: block; }

.btn-delete { background: var(--btn-red); color: #fff; border: none; padding: 6px 12px; border-radius: 4px; cursor: pointer; font-weight: 700; font-size: 13px; }
.btn-delete:hover { background: var(--btn-red-dark); }

/* ---------------- Utils ---------------- */
.hidden { display: none !important; }
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }

/* Alert */
.alert {
  padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px; font-size: 14px; font-weight: 700;
  border: 1px solid transparent;
}
.alert-success { background: #d4edda; color: #155724; border-color: #c3e6cb; }
.alert-error { background: #f8d7da; color: #721c24; border-color: #f5c6cb; }

/* Responsive */
@media (max-width: 768px) {
  .detail-wrapper { grid-template-columns: 1fr; }
  .cart-item { grid-template-columns: 60px 1fr 90px 70px auto; gap: 8px; font-size: 13px; }
  .cart-item .name { font-size: 13px; }
  .nav-links { gap: 8px; }
  .nav-link { font-size: 14px; padding: 6px 10px; }
  .container { padding: 12px; }
}