:root {
  --primary: #2c3e50;
  --accent: #3498db;
  --success: #27ae60;
  --warning: #f39c12;
  --danger: #e74c3c;
  --light: #f8f9fa;
  --border: #dee2e6;
  --text: #333;
  --muted: #6c757d;
  --sidebar-w: 240px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f0f2f5;
  color: var(--text);
  font-size: 14px;
}

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--primary);
  min-height: 100vh;
  position: fixed;
  top: 0; left: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
}

.sidebar-brand {
  padding: 20px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.sidebar-brand h2 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
}
.sidebar-brand span { color: #3498db; }

.sidebar-nav { flex: 1; padding: 12px 0; }

.nav-section {
  padding: 8px 16px 4px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255,255,255,0.4);
  font-weight: 600;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  transition: all 0.15s;
  font-size: 13.5px;
}
.nav-item:hover, .nav-item.active {
  background: rgba(255,255,255,0.1);
  color: #fff;
}
.nav-item.active { border-left: 3px solid var(--accent); }
.nav-item .icon { width: 18px; text-align: center; font-size: 15px; }

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.sidebar-footer a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 13px;
  display: flex; align-items: center; gap: 8px;
}
.sidebar-footer a:hover { color: #fff; }

/* ── Main content ── */
.main {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}
.topbar h1 { font-size: 17px; font-weight: 600; color: var(--primary); }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.user-badge {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--muted);
}
.user-badge .role {
  background: var(--accent);
  color: #fff;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  text-transform: capitalize;
}

.content { padding: 24px; flex: 1; }

/* ── Stage badges ── */
.stage-nav {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.stage-item {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  text-decoration: none;
  color: var(--muted);
  border-right: 1px solid var(--border);
  transition: background 0.15s;
  font-size: 13px;
}
.stage-item:last-child { border-right: none; }
.stage-item:hover { background: var(--light); }
.stage-item.active { background: var(--accent); color: #fff; }
.stage-item .stage-num {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: rgba(0,0,0,0.1);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 12px;
}
.stage-item.active .stage-num { background: rgba(255,255,255,0.25); }
.stage-item .stage-label { font-weight: 500; }
.stage-item .stage-desc { font-size: 11px; opacity: 0.7; }

/* ── Cards ── */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.card-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-header h3 { font-size: 15px; font-weight: 600; }
.card-body { padding: 20px; }

/* ── Stat cards ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
}
.stat-card .label { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.stat-card .value { font-size: 26px; font-weight: 700; color: var(--primary); }
.stat-card .sub { font-size: 11px; color: var(--muted); margin-top: 4px; }
.stat-card.accent { border-top: 3px solid var(--accent); }
.stat-card.success { border-top: 3px solid var(--success); }
.stat-card.warning { border-top: 3px solid var(--warning); }
.stat-card.danger { border-top: 3px solid var(--danger); }

/* ── Tables ── */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
}
thead th {
  background: var(--light);
  padding: 10px 12px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--muted);
  border-bottom: 2px solid var(--border);
}
tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tbody tr:hover { background: #fafbfc; }
tbody tr:last-child td { border-bottom: none; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #2980b9; color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #219a52; color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-secondary { background: #6c757d; color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-outline {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}
.btn-outline:hover { background: var(--accent); color: #fff; }

/* ── Forms ── */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-weight: 500;
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--primary);
}
.form-control {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.15s;
  background: #fff;
}
.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(52,152,219,0.12);
}
.form-text { font-size: 12px; color: var(--muted); margin-top: 4px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ── Alerts ── */
.alert {
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 13.5px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.alert-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.alert-danger { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.alert-warning { background: #fff3cd; color: #856404; border: 1px solid #ffc107; }
.alert-info { background: #d1ecf1; color: #0c5460; border: 1px solid #bee5eb; }

/* ── Badges ── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  text-transform: capitalize;
}
.badge-success { background: #d4edda; color: #155724; }
.badge-warning { background: #fff3cd; color: #856404; }
.badge-danger { background: #f8d7da; color: #721c24; }
.badge-info { background: #d1ecf1; color: #0c5460; }
.badge-secondary { background: #e9ecef; color: #6c757d; }
.badge-primary { background: #cce5ff; color: #004085; }

/* ── Upload zone ── */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--light);
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--accent);
  background: #e8f4fd;
}
.upload-zone .icon { font-size: 48px; margin-bottom: 12px; }
.upload-zone h4 { font-size: 16px; margin-bottom: 6px; }
.upload-zone p { color: var(--muted); font-size: 13px; }

/* ── Progress ── */
.progress-bar-wrap {
  background: #e9ecef;
  border-radius: 4px;
  height: 8px;
  overflow: hidden;
  margin: 8px 0;
}
.progress-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.3s;
}

/* ── Pagination ── */
.pagination {
  display: flex;
  gap: 4px;
  align-items: center;
  flex-wrap: wrap;
}
.page-btn {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: #fff;
  cursor: pointer;
  font-size: 13px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.15s;
}
.page-btn:hover, .page-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.page-btn.disabled { opacity: 0.4; cursor: not-allowed; pointer-events: none; }

/* ── Toolbar ── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.toolbar-left { flex: 1; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.toolbar-right { display: flex; gap: 8px; }

/* ── Misc ── */
.sku-code {
  font-family: monospace;
  font-size: 12px;
  background: #f8f9fa;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid #e0e0e0;
}
.text-muted { color: var(--muted); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }
.w-100 { width: 100%; }
.small { font-size: 12px; }

/* ── Loading spinner ── */
.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Image thumb ── */
.img-thumb {
  width: 48px; height: 48px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border);
}

/* ── Checkbox all ── */
.checkbox-col { width: 36px; }
input[type="checkbox"] { width: 15px; height: 15px; cursor: pointer; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar { width: 56px; }
  .sidebar-brand h2, .nav-item .nav-text, .nav-section, .sidebar-footer { display: none; }
  .main { margin-left: 56px; }
  .stage-item .stage-desc { display: none; }
  .form-row { grid-template-columns: 1fr; }
}