*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei',
    sans-serif;
  font-size: 14px;
  color: #1f2937;
  background: #eef1f5;
}

button,
input,
textarea {
  font: inherit;
}

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  min-height: 640px;
}

/* ── Top bar ── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 48px;
  padding: 0 16px;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  flex-shrink: 0;
}

.topbar__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  color: #111827;
}

.topbar__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
}

.topbar__meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: #6b7280;
}

.topbar__meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.topbar__pill {
  padding: 2px 8px;
  border-radius: 999px;
  background: #fef3c7;
  color: #b45309;
  font-weight: 500;
}

/* ── Main layout ── */
.main {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* ── Left tree ── */
.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: #f8fafc;
  border-right: 1px solid #e5e7eb;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar__head {
  padding: 12px 14px 8px;
  font-size: 12px;
  font-weight: 600;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tree {
  flex: 1;
  overflow: auto;
  padding: 0 8px 12px;
}

.tree-node {
  user-select: none;
}

.tree-row {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 8px;
  border-radius: 6px;
  cursor: pointer;
  color: #374151;
  line-height: 1.4;
}

.tree-row:hover {
  background: #e5e7eb;
}

.tree-row.is-selected {
  background: #dbeafe;
  color: #1d4ed8;
  font-weight: 500;
}

.tree-row.is-selected .tree-icon {
  color: #2563eb;
}

.tree-toggle {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: #9ca3af;
  flex-shrink: 0;
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
}

.tree-toggle.is-hidden {
  visibility: hidden;
}

.tree-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.tree-icon--account svg {
  width: 16px;
  height: 16px;
  color: #6b7280;
}

.tree-row.is-selected .tree-icon--account svg {
  color: #2563eb;
}

.tree-icon--letter {
  border-radius: 4px;
  background: #e5e7eb;
  color: #4b5563;
  font-size: 11px;
  font-weight: 700;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  line-height: 1;
}

.tree-row.is-selected .tree-icon--letter {
  background: #bfdbfe;
  color: #1d4ed8;
}

.tree-label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.tree-badge {
  flex-shrink: 0;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 999px;
  background: #f97316;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.tree-children {
  margin-left: 12px;
}

.tree-children.is-collapsed {
  display: none;
}

/* ── Center workspace ── */
.workspace {
  flex: 1;
  min-width: 0;
  overflow: auto;
  background: #fff;
  padding: 20px 24px;
}

.workspace__breadcrumb {
  font-size: 12px;
  color: #6b7280;
  margin-bottom: 4px;
}

.workspace__title {
  margin: 0 0 16px;
  font-size: 20px;
  font-weight: 600;
  color: #111827;
}

.panel {
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}

.panel__title {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 600;
  color: #374151;
}

.config-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px 20px;
}

.config-item__label {
  font-size: 12px;
  color: #6b7280;
  margin-bottom: 2px;
}

.config-item__value {
  font-size: 14px;
  color: #111827;
  font-weight: 500;
}

.metrics-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.metric-card {
  flex: 1;
  min-width: 120px;
  padding: 12px 14px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
}

.metric-card.is-alert {
  border-color: #fed7aa;
  background: #fffbeb;
}

.metric-card__label {
  font-size: 12px;
  color: #6b7280;
  margin-bottom: 4px;
}

.metric-card__value {
  font-size: 20px;
  font-weight: 600;
  color: #111827;
}

.metric-card__delta {
  font-size: 12px;
  margin-top: 2px;
  font-weight: 500;
}

.metric-card__delta.up-bad {
  color: #dc2626;
}

.metric-card__delta.down-bad {
  color: #dc2626;
}

.metric-card__delta.neutral {
  color: #6b7280;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th,
.data-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid #e5e7eb;
}

.data-table th {
  font-weight: 600;
  color: #6b7280;
  font-size: 12px;
  background: #f3f4f6;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:hover {
  background: #f9fafb;
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.tag--green {
  background: #dcfce7;
  color: #15803d;
}

.tag--red {
  background: #fee2e2;
  color: #b91c1c;
}

.tag--gray {
  background: #f3f4f6;
  color: #4b5563;
}

.workspace-pane {
  display: none;
}

.workspace-pane.is-active {
  display: block;
}

/* ── Right agent panel ── */
.agent-panel {
  width: 360px;
  flex-shrink: 0;
  background: #f8fafc;
  border-left: 1px solid #e5e7eb;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.agent-tabs {
  display: flex;
  border-bottom: 1px solid #e5e7eb;
  background: #fff;
  flex-shrink: 0;
}

.agent-tab {
  flex: 1;
  padding: 12px 8px;
  border: none;
  background: none;
  font-size: 13px;
  font-weight: 500;
  color: #6b7280;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.agent-tab:hover:not(.is-disabled) {
  color: #374151;
}

.agent-tab.is-active {
  color: #2563eb;
  border-bottom-color: #2563eb;
}

.agent-tab.is-disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.agent-body {
  flex: 1;
  overflow: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.agent-pane {
  display: none;
  flex-direction: column;
  gap: 12px;
}

.agent-pane.is-active {
  display: flex;
}

.alert-summary {
  background: #fff;
  border: 1px solid #fed7aa;
  border-radius: 8px;
  padding: 12px 14px;
}

.alert-summary__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: #c2410c;
  margin-bottom: 6px;
  font-size: 14px;
}

.alert-summary__rule {
  font-size: 12px;
  color: #6b7280;
  line-height: 1.5;
}

.thinking {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  overflow: hidden;
}

.thinking__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: #f3f4f6;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: #374151;
}

.thinking__head:hover {
  background: #e5e7eb;
}

.thinking__chevron {
  transition: transform 0.2s;
  color: #9ca3af;
}

.thinking.is-collapsed .thinking__chevron {
  transform: rotate(-90deg);
}

.thinking__body {
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.65;
  color: #374151;
}

.thinking.is-collapsed .thinking__body {
  display: none;
}

.thinking__body p {
  margin: 0 0 8px;
}

.thinking__body p:last-child {
  margin-bottom: 0;
}

.thinking__body strong {
  color: #111827;
}

.thinking__body ul {
  margin: 8px 0 0;
  padding-left: 18px;
}

.thinking__body li {
  margin-bottom: 4px;
}

.mini-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.mini-metric {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  padding: 8px 10px;
  text-align: center;
}

.mini-metric__label {
  font-size: 11px;
  color: #6b7280;
}

.mini-metric__value {
  font-size: 14px;
  font-weight: 600;
  color: #dc2626;
  margin-top: 2px;
}

.suggestions {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 14px;
}

.suggestions__title {
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 600;
  color: #111827;
}

.suggestions__hint {
  margin: 0 0 12px;
  font-size: 12px;
  color: #6b7280;
}

.suggestion-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

.suggestion-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.suggestion-item:hover {
  border-color: #93c5fd;
  background: #eff6ff;
}

.suggestion-item.is-checked {
  border-color: #2563eb;
  background: #eff6ff;
}

.suggestion-item input {
  margin-top: 3px;
  accent-color: #2563eb;
  flex-shrink: 0;
}

.suggestion-item__text {
  font-size: 13px;
  line-height: 1.5;
  color: #374151;
}

.suggestion-item__text strong {
  color: #111827;
}

.suggestion-item__effect {
  display: block;
  font-size: 12px;
  color: #6b7280;
  margin-top: 2px;
}

.suggestions__actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.btn {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn--ghost {
  background: #fff;
  border-color: #d1d5db;
  color: #374151;
}

.btn--ghost:hover {
  background: #f9fafb;
}

.btn--primary {
  background: #2563eb;
  color: #fff;
}

.btn--primary:hover {
  background: #1d4ed8;
}

.btn--primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.feedback {
  display: none;
  padding: 12px 14px;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: 8px;
  font-size: 13px;
  color: #065f46;
  line-height: 1.55;
}

.feedback.is-visible {
  display: block;
}

.feedback.is-dismiss {
  background: #f3f4f6;
  border-color: #e5e7eb;
  color: #6b7280;
}

.empty-state {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  color: #9ca3af;
  font-size: 13px;
}

/* ── Agent input ── */
.agent-input {
  flex-shrink: 0;
  padding: 12px 14px;
  background: #fff;
  border-top: 1px solid #e5e7eb;
}

.agent-input__row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.agent-input textarea {
  flex: 1;
  min-height: 40px;
  max-height: 100px;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  resize: none;
  line-height: 1.4;
}

.agent-input textarea:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.agent-input__send {
  padding: 10px 14px;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  flex-shrink: 0;
}

.agent-input__send:hover {
  background: #1d4ed8;
}

.agent-input__roles {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  margin-top: 8px;
}

.role-tag {
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
  color: #374151;
  background: #f3f4f6;
  border: 1px solid #e5e7eb;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.role-tag.is-active {
  color: #1d4ed8;
  background: #eff6ff;
  border-color: #bfdbfe;
}

@media (max-width: 1100px) {
  .sidebar {
    width: 200px;
  }

  .agent-panel {
    width: 320px;
  }
}