/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #F5F6F8;
  --card: #FFFFFF;
  --primary: #4A90D9;
  --primary-light: #E8F0FE;
  --success: #52C41A;
  --success-light: #F0FFF0;
  --warning: #FAAD14;
  --danger: #FF4D4F;
  --text: #1A1A2E;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;
  --border: #E5E7EB;
  --border-light: #F0F0F0;
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --radius: 10px;
  --radius-sm: 6px;
  --font: 'Inter', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
}

html { font-size: 15px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  padding-top: 68px; /* search bar height */
  -webkit-font-smoothing: antialiased;
}

/* ========== Search Bar (Fixed Top) ========== */
.search-bar-fixed {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.search-container {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  pointer-events: none;
}

#searchInput {
  width: 100%;
  padding: 12px 40px 12px 44px;
  border: 2px solid var(--border);
  border-radius: 12px;
  font-size: 1rem;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

#searchInput:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
  background: var(--card);
}

#searchInput::placeholder { color: var(--text-muted); }

.clear-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--border);
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  font-size: 16px;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.clear-btn:hover { background: var(--text-muted); color: white; }

/* ========== Header ========== */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.header-left { display: flex; align-items: baseline; gap: 10px; }
.logo {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text);
}
.subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
}

.header-right { display: flex; align-items: center; gap: 16px; }

.connection-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: background 0.3s;
}
.status-dot.connected { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-dot.disconnected { background: var(--danger); }

.devices-count {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ========== Tab Bar ========== */
.tab-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px 12px;
  max-width: 1200px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 8px;
}

.tabs { display: flex; gap: 4px; }

.tab {
  padding: 8px 20px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-family: var(--font);
  font-weight: 500;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.2s;
}
.tab:hover { background: var(--border-light); }
.tab.active { background: var(--primary); color: white; }

.tab-info {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.folder-name {
  background: var(--primary-light);
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 20px;
  font-weight: 500;
  font-size: 0.75rem;
}

/* Upload button */
.upload-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 0.8rem;
  font-family: var(--font);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}
.upload-btn:hover { opacity: 0.85; }
.upload-btn:active { transform: scale(0.97); }
.upload-btn svg { flex-shrink: 0; }

/* Upload status */
.upload-status {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.upload-progress-bar {
  flex: 1;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.upload-progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.3s;
  width: 0%;
}
.upload-status-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* ========== Stats ========== */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 0 20px 16px;
  max-width: 1200px;
  margin: 0 auto;
}

.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  text-align: center;
  transition: transform 0.2s;
}
.stat-card:hover { transform: translateY(-2px); }

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  font-family: 'Inter', sans-serif;
}
.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 500;
}

.stat-pending .stat-value { color: var(--warning); }
.stat-completed .stat-value { color: var(--success); }
.stat-amount .stat-value { color: var(--primary); font-size: 1.3rem; }

/* ========== Filter Bar ========== */
.filter-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px 12px;
  max-width: 1200px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-group { display: flex; gap: 4px; }

.filter-btn {
  padding: 6px 16px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-family: var(--font);
  cursor: pointer;
  border-radius: 20px;
  transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--primary); color: white; border-color: var(--primary); }

.sort-group select {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  font-size: 0.82rem;
  font-family: var(--font);
  color: var(--text-secondary);
  cursor: pointer;
  outline: none;
}

/* ========== Orders Container ========== */
.orders-container {
  padding: 0 20px 40px;
  max-width: 1200px;
  margin: 0 auto;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state svg { margin-bottom: 16px; opacity: 0.4; }
.empty-state p { font-size: 1rem; }
.empty-hint { font-size: 0.85rem; margin-top: 8px; }

/* ========== Desktop Table ========== */
.orders-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.orders-table thead { background: var(--bg); }
.orders-table th {
  padding: 12px 14px;
  text-align: left;
  font-weight: 600;
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.th-num { text-align: right; }
.th-note { width: 60px; text-align: center; }

.orders-table td {
  padding: 14px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.88rem;
  vertical-align: middle;
}
.orders-table tbody tr.customer-group-row { transition: opacity 0.3s ease, background 0.3s ease; }
.orders-table tbody tr:last-child td { border-bottom: none; }
.orders-table tbody tr.customer-group-row:hover { background: #FAFBFD; }

/* Completed row */
.orders-table tbody tr.completed {
  opacity: 0.4;
  background: #FAFAFA;
}
.orders-table tbody tr.completed td {
  text-decoration: line-through;
  text-decoration-color: var(--text-muted);
}
.orders-table tbody tr.completed td:last-child {
  text-decoration: none;
}

/* Row spacing — add top border gap between rows */
.orders-table tbody tr.customer-group-row td {
  border-bottom: 6px solid var(--bg);
}
.orders-table tbody tr.customer-group-row:last-child td {
  border-bottom: none;
}

/* Hidden rows (collapsed) */
.row-hidden {
  display: none !important;
}

/* Product image cell */
.product-cell {
  display: flex;
  align-items: center;
  gap: 10px;
}

.product-thumb {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: cover;
  background: var(--bg);
  border: 1px solid var(--border-light);
  flex-shrink: 0;
}

.product-placeholder {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 600;
  flex-shrink: 0;
}

.product-name { font-weight: 500; }

.amount-cell { text-align: right; font-weight: 600; font-family: 'Inter', sans-serif; }
.qty-cell { text-align: right; }

/* Payment ref inline input */
.payment-input {
  width: 72px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: 'Inter', monospace;
  font-size: 0.82rem;
  color: var(--text);
  background: var(--bg);
  text-align: center;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.payment-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-light);
  background: white;
}
.payment-input::placeholder {
  color: var(--text-muted);
  font-size: 0.72rem;
}

/* Note button */
.note-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 0.75rem;
  transition: all 0.2s;
}
.note-btn:hover { border-color: var(--primary); color: var(--primary); }
.note-btn.has-note { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }

/* ========== Customer Group Header (Desktop Table) ========== */
.customer-group-header td {
  padding: 0 !important;
  border-bottom: none !important;
  background: var(--bg);
}

.customer-group-header:first-child .group-header-inner {
  margin-top: 0;
}

.group-header-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  margin-top: 10px;
  border-left: 4px solid;
  background: linear-gradient(90deg, rgba(0,0,0,0.02) 0%, transparent 100%);
  cursor: pointer;
  user-select: none;
}

.group-header-inner:hover {
  background: linear-gradient(90deg, rgba(0,0,0,0.04) 0%, transparent 100%);
}

/* Group checkbox */
.group-checkbox {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border: 2px solid var(--border);
  border-radius: 5px;
  background: white;
  cursor: pointer;
  position: relative;
  transition: border-color 0.2s, background 0.2s;
  flex-shrink: 0;
}
.group-checkbox:hover {
  border-color: var(--text-muted);
}
.group-checkbox:checked {
  border-color: var(--text);
  background: white;
}
.group-checkbox:checked::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 1px;
  width: 6px;
  height: 12px;
  border: solid var(--text);
  border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg);
}

.group-color-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.group-name {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text);
}

.group-badge {
  background: var(--border-light);
  color: var(--text-secondary);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.72rem;
  font-weight: 500;
}

.group-amount {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  margin-left: auto;
}

.group-payment {
  flex-shrink: 0;
}

.group-progress {
  font-size: 0.72rem;
  color: var(--text-muted);
  background: var(--border-light);
  padding: 2px 8px;
  border-radius: 10px;
}

.group-toggle-arrow {
  font-size: 0.7rem;
  color: var(--text-muted);
  flex-shrink: 0;
  width: 16px;
  text-align: center;
  transition: transform 0.2s;
}

.customer-group-header.group-done .group-header-inner {
  opacity: 0.5;
}

.customer-group-header.group-done .group-name {
  text-decoration: line-through;
  text-decoration-color: var(--text-muted);
}

/* Group row: colored left border */
.customer-group-row {
  border-left: 3px solid var(--group-color, transparent);
}

.customer-group-row td:first-child {
  border-left: 3px solid var(--group-color, transparent);
}

/* ========== Mobile Cards ========== */
.orders-cards { display: flex; flex-direction: column; gap: 16px; }

/* Card group container */
.card-group {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--group-color, var(--primary));
  overflow: hidden;
}

.card-group.group-done {
  opacity: 0.5;
}

.card-group-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  background: linear-gradient(90deg, rgba(0,0,0,0.02) 0%, transparent 100%);
  border-bottom: 1px solid var(--border-light);
  cursor: pointer;
  user-select: none;
}

.card-group-header:hover {
  background: linear-gradient(90deg, rgba(0,0,0,0.04) 0%, transparent 100%);
}

.card-group-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-group-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Card group body — collapsible */
.card-group-body {
  transition: max-height 0.3s ease;
  overflow: hidden;
}

.card-group-body.body-hidden {
  display: none;
}

.card-group.collapsed .card-group-header {
  border-bottom: none;
}

.order-card {
  background: var(--card);
  padding: 14px;
  transition: opacity 0.3s ease, background 0.3s ease;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 4px;
}

.order-card:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.order-card.completed {
  opacity: 0.4;
  background: #FAFAFA;
}

.card-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.card-product-img {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  object-fit: cover;
  background: var(--bg);
  border: 1px solid var(--border-light);
  flex-shrink: 0;
}

.card-product-placeholder {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 600;
  flex-shrink: 0;
}

.card-info { flex: 1; min-width: 0; }
.card-product-name {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.card-customer {
  font-size: 0.82rem;
  color: var(--primary);
  font-weight: 500;
}

.card-amount {
  text-align: right;
  font-weight: 700;
  font-size: 1.1rem;
  font-family: 'Inter', sans-serif;
  color: var(--text);
  flex-shrink: 0;
}

.card-details {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px 16px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding-top: 10px;
  border-top: 1px solid var(--border-light);
}

.card-detail-label { color: var(--text-muted); }

.card-bottom {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border-light);
}

.card-date { font-size: 0.75rem; color: var(--text-muted); }

/* ========== Customer Summary ========== */
.customer-summary {
  padding: 0 20px 40px;
  max-width: 1200px;
  margin: 0 auto;
}
.customer-summary h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.customer-item {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
}

.customer-name { font-weight: 600; color: var(--text); }
.customer-stats { display: flex; gap: 16px; font-size: 0.82rem; color: var(--text-secondary); }
.customer-stat-val { font-weight: 600; color: var(--text); }

/* ========== Modal ========== */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal {
  background: var(--card);
  border-radius: var(--radius);
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-md);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
}
.modal-header h3 { font-size: 1rem; }
.modal-close {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--text-muted);
  padding: 0 4px;
}

.modal-body { padding: 16px 20px; }
.modal-body textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  resize: vertical;
  outline: none;
}
.modal-body textarea:focus { border-color: var(--primary); }

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--border-light);
}

.btn {
  padding: 8px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { opacity: 0.9; }
.btn-secondary { background: var(--border-light); color: var(--text-secondary); }
.btn-secondary:hover { background: var(--border); }

/* ========== Offline Banner ========== */
.offline-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--danger);
  color: white;
  padding: 10px;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 500;
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  html { font-size: 14px; }
  body { padding-top: 64px; }

  .search-bar-fixed { padding: 10px 12px; }
  #searchInput { padding: 10px 36px 10px 40px; font-size: 0.95rem; }

  .header { padding: 12px 16px; }
  .logo { font-size: 1.3rem; }
  .subtitle { display: none; }

  .tab-bar { padding: 0 16px 10px; }
  .tab { padding: 6px 14px; font-size: 0.82rem; }
  .folder-name { font-size: 0.7rem; }
  .last-update { display: none; }

  .upload-btn { padding: 6px 10px; font-size: 0.75rem; }
  .upload-btn-text { display: none; }
  .upload-status { padding: 6px 16px; }

  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    padding: 0 16px 12px;
  }
  .stat-card { padding: 12px; }
  .stat-value { font-size: 1.3rem; }
  .stat-amount .stat-value { font-size: 1.1rem; }

  .filter-bar { padding: 0 16px 10px; }
  .filter-btn { padding: 5px 12px; font-size: 0.78rem; }

  .orders-container { padding: 0 12px 100px; }

  /* Hide table, show cards on mobile */
  .orders-table { display: none !important; }
  .orders-cards { display: flex !important; }

  .card-group-header { padding: 10px 12px; }
  .group-name { font-size: 0.88rem; }
  .group-amount { font-size: 0.82rem; }

  .group-checkbox {
    width: 24px;
    height: 24px;
  }
  .group-checkbox:checked::after {
    left: 6px;
    top: 1px;
    width: 7px;
    height: 13px;
  }

  .payment-input {
    width: 58px;
    padding: 3px 6px;
    font-size: 0.75rem;
  }
}

@media (min-width: 769px) {
  /* Show table, hide cards on desktop */
  .orders-table { display: table !important; }
  .orders-cards { display: none !important; }
}

/* ========== Scrollbar ========== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ========== Animations ========== */
/* Minimal — avoid layout-triggering animations on mobile */