:root {
  /* Color palette — vibrant produce-inspired theme */
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #1a2235;
  --bg-card-hover: #1f2b42;
  --bg-glass: rgba(26, 34, 53, 0.85);
  --border-primary: rgba(99, 179, 115, 0.15);
  --border-subtle: rgba(255, 255, 255, 0.06);

  --text-primary: #f0f4f8;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-green: #22c55e;
  --accent-green-dim: rgba(34, 197, 94, 0.15);
  --accent-amber: #f59e0b;
  --accent-amber-dim: rgba(245, 158, 11, 0.15);
  --accent-red: #ef4444;
  --accent-red-dim: rgba(239, 68, 68, 0.15);
  --accent-blue: #3b82f6;
  --accent-blue-dim: rgba(59, 130, 246, 0.15);
  --accent-purple: #a855f7;
  --accent-purple-dim: rgba(168, 85, 247, 0.15);
  --accent-teal: #14b8a6;
  --accent-teal-dim: rgba(20, 184, 166, 0.15);

  --gradient-hero: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
  --gradient-card: linear-gradient(145deg, rgba(26, 34, 53, 0.9) 0%, rgba(17, 24, 39, 0.95) 100%);
  --gradient-green: linear-gradient(135deg, #22c55e, #16a34a);
  --gradient-amber: linear-gradient(135deg, #f59e0b, #d97706);
  --gradient-red: linear-gradient(135deg, #ef4444, #dc2626);

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow-green: 0 0 20px rgba(34, 197, 94, 0.2);
  --shadow-glow-amber: 0 0 20px rgba(245, 158, 11, 0.2);
  --shadow-glow-red: 0 0 20px rgba(239, 68, 68, 0.2);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
}

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

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ══════════════════════════════════════════════ */
/* HEADER                                        */
/* ══════════════════════════════════════════════ */

.header {
  background: var(--gradient-hero);
  border-bottom: 1px solid var(--border-primary);
  padding: 20px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
}

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

.header-logo {
  font-size: 32px;
  line-height: 1;
}

.header-title {
  display: flex;
  flex-direction: column;
}

.header-title h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #22c55e, #14b8a6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-title span {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 400;
}

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

.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 20px;
  background: var(--accent-green-dim);
  border: 1px solid rgba(34, 197, 94, 0.3);
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-green);
}

.header-status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.refresh-btn {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}

.refresh-btn:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text-primary);
  border-color: var(--accent-green);
}

.refresh-btn.spinning .icon {
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ══════════════════════════════════════════════ */
/* MAIN LAYOUT                                   */
/* ══════════════════════════════════════════════ */

.main-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 32px;
  display: grid;
  gap: 24px;
}

/* ══════════════════════════════════════════════ */
/* ALERT BANNER                                  */
/* ══════════════════════════════════════════════ */

.alert-banner {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.12), rgba(245, 158, 11, 0.08));
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideDown 0.4s ease;
}

.alert-banner.hidden {
  display: none;
}

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

.alert-banner .alert-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.alert-banner .alert-text {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
}

.alert-banner .alert-text span {
  color: var(--accent-amber);
  font-weight: 600;
}

/* ══════════════════════════════════════════════ */
/* STATS SUMMARY ROW                             */
/* ══════════════════════════════════════════════ */

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.stat-card:hover {
  border-color: var(--border-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-card .stat-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.stat-card .stat-value {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1;
  margin-bottom: 4px;
}

.stat-card .stat-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 400;
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.15;
}

.stat-card.green .stat-value { color: var(--accent-green); }
.stat-card.green::after { background: var(--accent-green); }
.stat-card.amber .stat-value { color: var(--accent-amber); }
.stat-card.amber::after { background: var(--accent-amber); }
.stat-card.red .stat-value { color: var(--accent-red); }
.stat-card.red::after { background: var(--accent-red); }
.stat-card.blue .stat-value { color: var(--accent-blue); }
.stat-card.blue::after { background: var(--accent-blue); }

/* ══════════════════════════════════════════════ */
/* STOCK GRID                                    */
/* ══════════════════════════════════════════════ */

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.section-title {
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title .icon {
  font-size: 22px;
}

.stock-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.stock-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stock-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-primary);
}

.stock-card .card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
}

.stock-card .item-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.stock-card .item-category {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 2px;
}

.status-badge {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.status-badge.ok {
  background: var(--accent-green-dim);
  color: var(--accent-green);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.status-badge.low {
  background: var(--accent-amber-dim);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.3);
  animation: pulse-badge 2s infinite;
}

.status-badge.out {
  background: var(--accent-red-dim);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.3);
  animation: pulse-badge 1.5s infinite;
}

@keyframes pulse-badge {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.stock-card .stock-value {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1;
  margin-bottom: 4px;
}

.stock-card .stock-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.stock-card .stock-details {
  display: flex;
  gap: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}

.stock-detail-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stock-detail-item .detail-value {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.stock-detail-item .detail-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

/* Glow effect based on status */
.stock-card.status-ok { border-left: 3px solid var(--accent-green); }
.stock-card.status-ok:hover { box-shadow: var(--shadow-glow-green); }
.stock-card.status-low { border-left: 3px solid var(--accent-amber); }
.stock-card.status-low:hover { box-shadow: var(--shadow-glow-amber); }
.stock-card.status-out { border-left: 3px solid var(--accent-red); }
.stock-card.status-out:hover { box-shadow: var(--shadow-glow-red); }

.stock-card .stock-value.green { color: var(--accent-green); }
.stock-card .stock-value.amber { color: var(--accent-amber); }
.stock-card .stock-value.red { color: var(--accent-red); }

/* ══════════════════════════════════════════════ */
/* STOCK IN FORM                                 */
/* ══════════════════════════════════════════════ */

.form-section {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.form-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 2fr 1fr auto;
  gap: 12px;
  align-items: end;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group select,
.form-group input {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: var(--transition-fast);
}

.form-group select:focus,
.form-group input:focus {
  outline: none;
  border-color: var(--accent-green);
  box-shadow: 0 0 0 3px var(--accent-green-dim);
}

.form-group select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.submit-btn {
  background: var(--gradient-green);
  border: none;
  color: white;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}

.submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow-green);
}

.submit-btn:active {
  transform: translateY(0);
}

.submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ══════════════════════════════════════════════ */
/* ACTIVITY FEED                                 */
/* ══════════════════════════════════════════════ */

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.activity-section {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-height: 480px;
  display: flex;
  flex-direction: column;
}

.activity-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
}

.activity-list::-webkit-scrollbar {
  width: 4px;
}

.activity-list::-webkit-scrollbar-track {
  background: transparent;
}

.activity-list::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 4px;
}

.activity-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.02);
  border: 1px solid transparent;
  transition: var(--transition-fast);
}

.activity-item:hover {
  background: rgba(255,255,255,0.04);
  border-color: var(--border-subtle);
}

.activity-item .activity-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.activity-item .activity-content {
  flex: 1;
  min-width: 0;
}

.activity-item .activity-text {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.activity-item .activity-meta {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

.activity-item .activity-qty {
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.activity-item .activity-qty.positive { color: var(--accent-green); }
.activity-item .activity-qty.negative { color: var(--accent-red); }

/* ══════════════════════════════════════════════ */
/* CATALOG TABLE                                 */
/* ══════════════════════════════════════════════ */

.catalog-section {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-height: 480px;
  display: flex;
  flex-direction: column;
}

.catalog-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  flex: 1;
  overflow-y: auto;
}

.catalog-table th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  background: var(--bg-card);
}

.catalog-table td {
  padding: 10px 12px;
  font-size: 13px;
  border-bottom: 1px solid rgba(255,255,255,0.03);
  color: var(--text-secondary);
}

.catalog-table tr:hover td {
  background: rgba(255,255,255,0.02);
  color: var(--text-primary);
}

/* ══════════════════════════════════════════════ */
/* LOADING & EMPTY STATES                        */
/* ══════════════════════════════════════════════ */

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  gap: 16px;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--accent-green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-text {
  font-size: 14px;
  color: var(--text-muted);
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
  font-size: 14px;
}

/* ══════════════════════════════════════════════ */
/* TOAST NOTIFICATIONS                           */
/* ══════════════════════════════════════════════ */

.toast-container {
  position: fixed;
  top: 80px;
  right: 24px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
  min-width: 280px;
}

.toast.success { border-left: 3px solid var(--accent-green); }
.toast.error { border-left: 3px solid var(--accent-red); }
.toast.info { border-left: 3px solid var(--accent-blue); }

@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; transform: translateX(20px); }
}

/* ══════════════════════════════════════════════ */
/* RESPONSIVE                                    */
/* ══════════════════════════════════════════════ */

@media (max-width: 1024px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .two-column { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr 1fr; }
  .submit-btn { grid-column: span 2; justify-content: center; }
}

@media (max-width: 640px) {
  .header { padding: 16px; }
  .main-container { padding: 16px; }
  .stats-row { grid-template-columns: 1fr; }
  .stock-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .submit-btn { grid-column: 1; }
}