:root {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text: #0f172a;
  --text-muted: #64748b;
  --text-faint: #94a3b8;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-soft: #eef2ff;
  --service: #2563eb;
  --service-soft: #eff6ff;
  --product: #059669;
  --product-soft: #ecfdf5;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

/* ---------- Header ---------- */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.3px;
  box-shadow: var(--shadow-sm);
}

.brand-text h1 {
  font-size: 16px;
  font-weight: 700;
  margin: 0;
  color: var(--text);
  letter-spacing: -0.01em;
}

.brand-subtitle {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--text-muted);
}

.sku-input {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sku-input label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.sku-input input {
  padding: 7px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  width: 140px;
  font-size: 13px;
  color: var(--text);
  background: var(--surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.sku-input input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

/* ---------- Policy picker + Phạm vi áp dụng ---------- */

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

.policy-picker label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  flex-shrink: 0;
}

.policy-name-display {
  font-size: 12px;
  color: var(--text-muted);
  font-style: italic;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.combobox {
  position: relative;
  flex-shrink: 0;
}

.combobox input {
  padding: 7px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  width: 230px;
  font-size: 13px;
  color: var(--text);
  background: var(--surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.combobox input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.combobox-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 100%;
  width: max-content;
  max-width: 420px;
  max-height: 260px;
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  z-index: 20;
}

.combobox-dropdown.open {
  display: block;
}

.combobox-item {
  padding: 7px 10px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
}

.combobox-item:hover {
  background: var(--primary-soft);
}

.combobox-item-empty {
  color: var(--text-muted);
  font-style: italic;
}

.combobox-empty-hint {
  padding: 7px 10px;
  font-size: 12px;
  color: var(--text-faint);
}

.scope-table {
  margin-bottom: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.scope-table-header {
  padding: 8px 12px;
  background: var(--danger);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.scope-table-header::-webkit-details-marker {
  display: none;
}

.scope-table-header::before {
  content: "▸";
  font-size: 10px;
  transition: transform 0.15s;
}

.scope-table[open] > .scope-table-header::before {
  transform: rotate(90deg);
}

.scope-table-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.scope-table-grid .hint {
  grid-column: 1 / -1;
  padding: 10px 12px;
  margin: 0;
}

.scope-cell {
  padding: 7px 12px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
}

.scope-cell:hover {
  background: var(--primary-soft);
}

.scope-cell.selected {
  background: #67e8f9;
}

/* ---------- Buttons ---------- */

button {
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: white;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  box-shadow: var(--shadow-sm);
  transition: background 0.15s, transform 0.1s, box-shadow 0.15s;
}

button:hover {
  background: var(--primary-hover);
  box-shadow: var(--shadow);
}

button:active {
  transform: translateY(1px);
}

/* ---------- Layout ---------- */

main {
  display: grid;
  grid-template-columns: 260px 1fr 1fr;
  gap: 20px;
  padding: 20px 24px;
  align-items: start;
}

section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 16px;
}

.result-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

section h2 {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

/* ---------- Palette ---------- */

.palette-search {
  width: 100%;
  padding: 7px 10px;
  margin-bottom: 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.palette-search:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.palette-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
  max-height: 320px;
  overflow-y: auto;
  padding-right: 2px;
}

.palette-list::-webkit-scrollbar {
  width: 6px;
}

.palette-list::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 3px;
}

.palette-group {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  background: #fafbfc;
}

.palette-group summary {
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  padding: 4px 2px;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.palette-group summary::-webkit-details-marker {
  display: none;
}

.palette-group summary::before {
  content: "▸";
  font-size: 10px;
  color: var(--text-faint);
  transition: transform 0.15s;
}

.palette-group[open] summary::before {
  transform: rotate(90deg);
}

.palette-group .palette-item {
  margin-top: 6px;
}

.palette-item {
  padding: 9px 11px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border-strong);
  border-radius: var(--radius-sm);
  cursor: grab;
  font-size: 13px;
  color: var(--text);
  transition: box-shadow 0.15s, transform 0.1s, border-color 0.15s;
}

.palette-item:hover {
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.palette-item:active {
  cursor: grabbing;
}

.palette-item.kind-service {
  border-left-color: var(--service);
}

.palette-item.kind-product {
  border-left-color: var(--product);
}

/* ---------- Canvas ---------- */

.drop-zone {
  min-height: 350px;
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #fafbfc;
  transition: border-color 0.15s, background 0.15s;
}

.drop-zone.drag-over {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.hint {
  color: var(--text-faint);
  font-size: 13px;
  margin: auto;
}

.block-card {
  border: 1px solid var(--border);
  border-left: 4px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 12px 14px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.block-card.kind-service {
  border-left-color: var(--service);
}

.block-card.kind-product {
  border-left-color: var(--product);
}

.block-card .title {
  font-weight: 700;
  font-size: 13px;
  color: var(--text);
  margin: 0 28px 10px 0;
}

.block-fields {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
}

.field input,
.field select {
  padding: 6px 8px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text);
  background: var(--surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.remove-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 22px;
  height: 22px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--surface);
  color: var(--danger);
  border: 1px solid var(--border);
  box-shadow: none;
  font-size: 13px;
  line-height: 1;
}

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

/* ---------- Result ---------- */

.result-toolbar {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border-strong);
  box-shadow: none;
}

.btn-secondary:hover {
  background: var(--bg);
  box-shadow: none;
}

.json-tree {
  font-family: "Cascadia Code", "Fira Code", Consolas, monospace;
  font-size: 12px;
  line-height: 1.7;
  background: #0f172a;
  color: #e2e8f0;
  padding: 14px 16px;
  border-radius: var(--radius);
  max-height: 500px;
  overflow: auto;
  box-shadow: var(--shadow-sm);
}

.json-tree::-webkit-scrollbar {
  width: 6px;
}

.json-tree::-webkit-scrollbar-thumb {
  background: #334155;
  border-radius: 3px;
}

.json-node > summary {
  cursor: pointer;
  list-style: none;
  padding: 1px 0;
}

.json-node > summary::-webkit-details-marker {
  display: none;
}

.json-node > summary::before {
  content: "▸";
  display: inline-block;
  width: 12px;
  font-size: 9px;
  color: var(--text-faint);
  transition: transform 0.15s;
}

.json-node[open] > summary::before {
  transform: rotate(90deg);
}

.json-badge {
  color: #64748b;
  font-size: 11px;
  margin-left: 6px;
}

.json-children {
  margin-left: 14px;
  padding-left: 10px;
  border-left: 1px dashed #334155;
}

.json-line {
  padding: 1px 0;
}

.json-punct,
.json-colon {
  color: #64748b;
}

.json-key {
  color: #7dd3fc;
}

.json-string {
  color: #86efac;
}

.json-number {
  color: #fbbf24;
}

.json-boolean {
  color: #c4b5fd;
  font-weight: 600;
}

.json-null {
  color: #f87171;
  font-style: italic;
}

.error-box {
  color: #991b1b;
  background: #fef2f2;
  border: 1px solid #fecaca;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.success-box {
  color: #166534;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 8px;
}