:root {
  --lsb-orange: #F39C12;
  --lsb-orange-dark: #E67E22;
  --lsb-red: #D9534F;
  --lsb-yellow: #F1C40F;
  --lsb-blue: #2980B9;
  --lsb-blue-light: #3498DB;
  --lsb-blue-dark: #1F618D;
  --bg: #F6F8FA;
  --card: #FFFFFF;
  --border: #E5E9F0;
  --text: #1F2937;
  --text-muted: #6B7280;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --radius: 10px;
  --shadow: 0 2px 10px rgba(41, 128, 185, 0.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: 'Segoe UI', Roboto, system-ui, sans-serif;
  font-size: 14px; color: var(--text); background: var(--bg); }
a { color: var(--lsb-blue); text-decoration: none; }
a:hover { color: var(--lsb-blue-dark); }

.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.header {
  background: linear-gradient(135deg, var(--lsb-blue) 0%, var(--lsb-blue-dark) 100%);
  color: white; padding: 14px 0; box-shadow: var(--shadow); position: sticky; top: 0; z-index: 50;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 18px; color: white; }
.brand img { height: 38px; }
.brand small { display: block; font-size: 11px; opacity: 0.85; font-weight: 400; }
.nav { display: flex; gap: 4px; align-items: center; }
.nav a { color: rgba(255,255,255,0.9); padding: 8px 14px; border-radius: 6px; font-weight: 500; transition: background 0.15s; }
.nav a:hover, .nav a.active { background: rgba(255,255,255,0.15); color: white; }
.user-chip { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px;
  background: rgba(255,255,255,0.15); border-radius: 6px; color: white; }
.user-chip i { color: var(--lsb-yellow); }

main { padding: 24px 0 60px; min-height: calc(100vh - 80px); }
h1, h2, h3 { margin-top: 0; }
.page-title { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; gap: 16px; flex-wrap: wrap; }
.page-title h1 { margin: 0; font-size: 22px; color: var(--lsb-blue-dark); }
.page-title .subtitle { color: var(--text-muted); font-size: 13px; margin-top: 4px; }

.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--border); margin-bottom: 20px; overflow: hidden; }
.card-header { padding: 14px 20px; border-bottom: 1px solid var(--border); background: #FAFBFC; }
.card-header h3 { margin: 0; font-size: 15px; color: var(--lsb-blue-dark); }
.card-body { padding: 20px; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat-card { background: var(--card); border-radius: var(--radius); padding: 16px; display: flex; align-items: center; gap: 14px; box-shadow: var(--shadow); border: 1px solid var(--border); border-left: 4px solid var(--lsb-blue); }
.stat-card.orange { border-left-color: var(--lsb-orange); }
.stat-card.yellow { border-left-color: var(--lsb-yellow); }
.stat-card.red { border-left-color: var(--danger); }
.stat-card.green { border-left-color: var(--success); }
.stat-icon { width: 44px; height: 44px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 20px; color: white; background: var(--lsb-blue); flex-shrink: 0; }
.stat-card.orange .stat-icon { background: var(--lsb-orange); }
.stat-card.yellow .stat-icon { background: var(--lsb-yellow); color: #664d03; }
.stat-card.red .stat-icon { background: var(--danger); }
.stat-card.green .stat-icon { background: var(--success); }
.stat-label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 4px; }
.stat-value { font-size: 22px; font-weight: 700; color: var(--text); }

.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 6px; font-weight: 500; font-size: 13px; cursor: pointer; border: 1px solid transparent; transition: all 0.15s; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-primary { background: var(--lsb-blue); color: white; }
.btn-primary:hover:not(:disabled) { background: var(--lsb-blue-dark); color: white; }
.btn-orange { background: var(--lsb-orange); color: white; }
.btn-orange:hover:not(:disabled) { background: var(--lsb-orange-dark); color: white; }
.btn-outline { background: white; color: var(--lsb-blue); border-color: var(--lsb-blue); }
.btn-outline:hover:not(:disabled) { background: var(--lsb-blue); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover:not(:disabled) { background: #C82333; color: white; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

.form-group { margin-bottom: 14px; }
.form-label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; color: var(--text); }
.form-label .req { color: var(--danger); }
.form-control { width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; background: white; transition: border-color 0.15s, box-shadow 0.15s; }
.form-control:focus { border-color: var(--lsb-blue); outline: 0; box-shadow: 0 0 0 3px rgba(41,128,185,0.15); }
textarea.form-control { resize: vertical; min-height: 70px; }

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
.table th { background: #F9FAFB; font-weight: 600; color: var(--lsb-blue-dark); font-size: 12px; text-transform: uppercase; letter-spacing: 0.4px; }
.table tbody tr:hover { background: #FAFBFC; }
.table td.text-right, .table th.text-right { text-align: right; }
.table td.text-center, .table th.text-center { text-align: center; }
.table-responsive { overflow-x: auto; }

.badge { display: inline-block; padding: 3px 9px; border-radius: 12px; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.3px; }
.badge-pending { background: #FEF3C7; color: #92400E; }
.badge-approved { background: #D1FAE5; color: #065F46; }
.badge-rejected { background: #FEE2E2; color: #991B1B; }
.badge-cancelled { background: #E5E7EB; color: #374151; }
.badge-ok { background: #D1FAE5; color: #065F46; }
.badge-low { background: #FEF3C7; color: #92400E; }
.badge-out { background: #FEE2E2; color: #991B1B; }

.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; font-weight: 500; }
.flash.success { background: #D1FAE5; color: #065F46; border: 1px solid #A7F3D0; }
.flash.error { background: #FEE2E2; color: #991B1B; border: 1px solid #FECACA; }
.flash.info { background: #DBEAFE; color: #1E40AF; border: 1px solid #BFDBFE; }

.empty { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty i { font-size: 42px; color: var(--border); margin-bottom: 12px; }
.empty h3 { margin: 10px 0 6px; color: var(--text); }

/* Login */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #E8F1FA 0%, #FDF2E4 100%); padding: 20px; }
.login-card { background: white; border-radius: 14px; padding: 34px; width: 100%; max-width: 400px;
  box-shadow: 0 15px 50px rgba(41,128,185,0.15); }
.login-logo { text-align: center; margin-bottom: 24px; }
.login-logo img { height: 62px; }
.login-logo h2 { margin: 12px 0 4px; color: var(--lsb-blue-dark); font-size: 20px; }
.login-logo p { margin: 0; color: var(--text-muted); font-size: 13px; }
.login-card .btn { width: 100%; justify-content: center; padding: 10px; font-size: 14px; }

/* SKU cards / list */
.sku-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
.sku-card { background: white; border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; position: relative; transition: box-shadow 0.15s, border-color 0.15s; }
.sku-card:hover { box-shadow: var(--shadow); border-color: var(--lsb-blue); }
.sku-card.status-out { border-left: 4px solid var(--danger); }
.sku-card.status-low { border-left: 4px solid var(--warning); }
.sku-card.status-ok  { border-left: 4px solid var(--success); }
.sku-card .sku-code { font-family: 'Courier New', monospace; font-weight: 700; color: var(--lsb-blue); font-size: 14px; }
.sku-card .sku-asin { font-family: 'Courier New', monospace; color: var(--text-muted); font-size: 12px; margin-top: 2px; }
.sku-card .sku-title { margin: 8px 0; font-size: 13px; line-height: 1.4; color: #333; min-height: 36px; }
.sku-card .sku-stock { display: flex; justify-content: space-between; align-items: center; padding-top: 8px; border-top: 1px dashed var(--border); font-size: 12px; }
.sku-card .stock-num { font-size: 18px; font-weight: 700; }
.sku-card .qty-row { margin-top: 10px; display: flex; gap: 8px; align-items: center; }
.sku-card .qty-row input { width: 100px; }

.filter-bar { display: flex; gap: 12px; align-items: end; flex-wrap: wrap; margin-bottom: 16px; }
.filter-bar .form-group { margin: 0; }

.text-muted { color: var(--text-muted); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.font-mono { font-family: 'Courier New', monospace; }

.info-box { padding: 14px 16px; background: #F0F9FF; border: 1px solid #BAE6FD; border-radius: 8px;
  color: #0C4A6E; font-size: 13px; line-height: 1.5; margin-bottom: 16px; display: flex; gap: 12px; }
.info-box i { color: var(--lsb-blue); font-size: 18px; margin-top: 1px; }

@media (max-width: 768px) {
  .header-inner { flex-wrap: wrap; gap: 10px; }
  .nav { order: 3; width: 100%; overflow-x: auto; }
  .page-title h1 { font-size: 18px; }
}