:root {
  --bg: #f7faff;
  --panel: #ffffff;
  --line: rgba(147, 197, 253, 0.35);
  --line-strong: rgba(96, 165, 250, 0.55);
  --text: #1f2933;
  --heading: #0f172a;
  --muted: #64748b;
  --accent: #2563eb;
  --success: #059669;
  --warn: #b45309;
  --danger: #dc2626;
  --shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background:
    radial-gradient(circle at top left, rgba(59, 130, 246, 0.12), transparent 28%),
    radial-gradient(circle at bottom right, rgba(96, 165, 250, 0.1), transparent 30%),
    linear-gradient(180deg, #f7faff 0%, #eef4ff 100%);
  color: var(--text);
  font-family: "Inter", sans-serif;
}

button,
input,
select {
  font: inherit;
}

.demo-back {
  position: fixed;
  top: 20px;
  left: 24px;
  z-index: 999;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: #ffffff;
  color: var(--heading);
  text-decoration: none;
  font-size: 0.84rem;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
  transition: background 180ms ease, border-color 180ms ease;
}

.demo-back:hover {
  background: #eff6ff;
  border-color: var(--accent);
}

.app-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 84px 20px 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  flex-wrap: wrap;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.74rem;
  font-weight: 700;
  font-family: "Chakra Petch", sans-serif;
}

h1,
h2 {
  margin: 0;
  font-family: "Chakra Petch", sans-serif;
  color: var(--heading);
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1;
}

.brand-block .lede {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.6;
  max-width: 62ch;
}

.header-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.primary-button {
  padding: 10px 18px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, #2563eb, #60a5fa);
  color: #ffffff;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.24);
  transition: transform 180ms ease, filter 180ms ease, box-shadow 180ms ease;
}

.primary-button:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
  box-shadow: 0 12px 22px rgba(37, 99, 235, 0.28);
}

.ghost-button {
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: #ffffff;
  color: var(--heading);
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.ghost-button:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  background: #eff6ff;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.stat-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-card span {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

.stat-card strong {
  font-family: "Chakra Petch", sans-serif;
  font-size: 1.7rem;
  line-height: 1.1;
  color: var(--heading);
}

.stat-card small {
  color: var(--muted);
  font-size: 0.76rem;
}

.stat-card.accent strong {
  color: var(--accent);
}

.stat-card.warn strong {
  color: var(--warn);
}

.stat-card.danger strong {
  color: var(--danger);
}

.panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 18px;
}

.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.search-input {
  flex: 1 1 260px;
  min-width: 200px;
}

.search-input,
.toolbar select {
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid #cbd5e1;
  background: #ffffff;
  color: var(--text);
}

.search-input:focus,
.toolbar select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.search-input::placeholder {
  color: #94a3b8;
}

.result-count {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.82rem;
  white-space: nowrap;
}

.table-scroll {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--line);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

thead th {
  position: sticky;
  top: 0;
  background: #eef4ff;
  color: #475569;
  text-align: left;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 12px 10px;
  white-space: nowrap;
  border-bottom: 1px solid var(--line-strong);
}

thead th.num {
  text-align: right;
}

th.sortable {
  cursor: pointer;
  user-select: none;
}

th.sortable:hover {
  color: var(--heading);
}

th.sortable.sorted-asc::after {
  content: " ▲";
  color: var(--accent);
}

th.sortable.sorted-desc::after {
  content: " ▼";
  color: var(--accent);
}

tbody td {
  padding: 10px 10px;
  border-bottom: 1px solid rgba(147, 197, 253, 0.22);
  white-space: nowrap;
  vertical-align: middle;
}

.category-cell {
  white-space: normal;
  line-height: 1.3;
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:nth-child(even) {
  background: rgba(239, 246, 255, 0.55);
}

tbody tr:hover {
  background: rgba(37, 99, 235, 0.07);
}

td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.item-cell {
  white-space: normal;
  min-width: 200px;
}

.item-name {
  display: block;
  line-height: 1.35;
  color: var(--heading);
}

.item-meta {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.74rem;
  white-space: nowrap;
}

.sku-cell {
  font-family: "Chakra Petch", sans-serif;
  color: var(--accent);
  font-size: 0.78rem;
}

.supplier-cell {
  white-space: normal;
  line-height: 1.3;
}

.price-strong {
  display: block;
  color: var(--heading);
}

.price-cost {
  display: block;
  color: var(--muted);
  font-size: 0.76rem;
}

.muted-cell {
  color: var(--muted);
}

.qty-strong {
  font-weight: 700;
  color: var(--heading);
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.badge.in {
  background: rgba(5, 150, 105, 0.1);
  color: var(--success);
  border: 1px solid rgba(5, 150, 105, 0.3);
}

.badge.low {
  background: rgba(217, 119, 6, 0.1);
  color: var(--warn);
  border: 1px solid rgba(217, 119, 6, 0.35);
}

.badge.out {
  background: rgba(220, 38, 38, 0.08);
  color: var(--danger);
  border: 1px solid rgba(220, 38, 38, 0.3);
}

.qty-controls {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.qty-controls .qty-strong {
  min-width: 2.2ch;
  text-align: center;
}

.qty-btn,
.row-btn,
.icon-button {
  border-radius: 8px;
  border: 1px solid #cbd5e1;
  background: #ffffff;
  color: var(--heading);
  cursor: pointer;
  transition: border-color 150ms ease, background 150ms ease;
}

.qty-btn {
  width: 26px;
  height: 26px;
  line-height: 1;
  font-weight: 700;
  padding: 0;
}

.row-btn {
  padding: 5px 10px;
  font-size: 0.76rem;
}

.qty-btn:hover,
.row-btn:hover,
.icon-button:hover {
  border-color: var(--accent);
  background: #eff6ff;
}

.row-btn.danger:hover {
  border-color: var(--danger);
  background: #fef2f2;
  color: var(--danger);
}

.row-actions {
  display: inline-flex;
  gap: 6px;
}

.empty-row td {
  text-align: center;
  color: var(--muted);
  padding: 34px 12px;
}

/* ── Modal ── */
.modal-overlay[hidden] {
  display: none;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal {
  width: min(640px, 100%);
  max-height: 90vh;
  overflow: auto;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: #ffffff;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.22);
  padding: 22px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.modal-header h2 {
  font-size: 1.3rem;
}

.icon-button {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  padding: 0;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.field.span-2 {
  grid-column: span 2;
}

.field span {
  color: var(--muted);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.field input {
  width: 100%;
  min-width: 0;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #cbd5e1;
  background: #ffffff;
  color: var(--text);
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.field input::placeholder {
  color: #94a3b8;
}

.form-error {
  margin: 12px 0 0;
  color: var(--danger);
  font-size: 0.85rem;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1100;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid rgba(5, 150, 105, 0.35);
  background: #ffffff;
  color: var(--success);
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.16);
}

/* ── Responsive ── */
@media (max-width: 1120px) {
  table {
    font-size: 0.84rem;
  }

  .row-actions {
    flex-direction: column;
  }

  .row-actions .row-btn {
    width: 100%;
  }
}

@media (max-width: 960px) {
  #inventoryTable th:nth-child(4),
  #inventoryTable td:nth-child(4) {
    display: none;
  }

  .item-cell {
    min-width: 160px;
  }
}

@media (max-width: 900px) {
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 620px) {
  .app-shell {
    padding-top: 76px;
  }

  .field-grid {
    grid-template-columns: 1fr;
  }

  .field.span-2 {
    grid-column: span 1;
  }

  .result-count {
    margin-left: 0;
    flex-basis: 100%;
  }
}