/* Buttons */
.ut-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 8px 16px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  text-decoration: none;
  white-space: nowrap;
}
.ut-btn:hover:not(:disabled) {
  border-color: var(--border-strong);
  background: var(--bg-muted);
}
.ut-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.ut-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.ut-btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.ut-btn--primary:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}
.ut-btn--ghost {
  border-color: transparent;
  background: transparent;
}
.ut-btn--ghost:hover:not(:disabled) { background: var(--bg-subtle); }
.ut-btn--sm { padding: 5px 10px; font-size: 12px; }
.ut-btn--icon { width: 36px; padding: 0; }

/* Card */
.ut-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* Filter bar */
.ut-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: var(--space-4);
  align-items: flex-end;
}
.ut-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 140px;
}
.ut-field label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}
.ut-input,
.ut-select {
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 13px;
  color: var(--text-primary);
  background: var(--bg-surface);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.ut-input:focus,
.ut-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-muted);
}
.ut-input::placeholder { color: var(--text-muted); }
.ut-textarea {
  min-height: 88px;
  padding: 10px 12px;
  resize: vertical;
  line-height: 1.5;
}
.ut-filter__actions {
  display: flex;
  gap: var(--space-2);
  margin-left: auto;
  align-self: flex-end;
}

/* Badges */
.ut-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
}
.ut-badge--success { background: var(--success-bg); color: var(--success); }
.ut-badge--warning { background: var(--warning-bg); color: var(--warning); }
.ut-badge--neutral { background: var(--bg-subtle); color: var(--text-secondary); }
.ut-badge--dot::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* Table */
.ut-table-wrap { overflow: auto; }
.ut-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.ut-table th,
.ut-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border-default);
  vertical-align: middle;
}
.ut-table th {
  background: var(--bg-muted);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 12px;
  white-space: nowrap;
  position: sticky;
  top: 0;
  z-index: 1;
}
.ut-table tbody tr {
  transition: background var(--dur) var(--ease);
}
.ut-table tbody tr:hover { background: var(--accent-muted); }
.ut-table .cell-mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
}
.ut-table .cell-num {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.ut-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}
.ut-link:hover { text-decoration: underline; }

/* Tree row */
.ut-tree-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  margin-right: 6px;
  border: none;
  border-radius: 4px;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  vertical-align: middle;
  transition: background var(--dur) var(--ease);
}
.ut-tree-toggle:hover { background: var(--border-default); }
.ut-tree-toggle.is-leaf {
  visibility: hidden;
  pointer-events: none;
}
.ut-tree-name {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 500;
}
.ut-tree-name--parent { font-weight: 600; color: var(--text-primary); }

/* Pagination */
.ut-pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: var(--space-4);
  border-top: 1px solid var(--border-default);
  font-size: 13px;
  color: var(--text-secondary);
}
.ut-pager__nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.ut-pager__nav button {
  min-width: 32px;
  height: 32px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  cursor: pointer;
  font-size: 13px;
}
.ut-pager__nav button:hover { border-color: var(--accent); color: var(--accent); }
.ut-pager__nav button.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Section form */
.ut-section {
  padding: var(--space-5);
  border-bottom: 1px solid var(--border-default);
}
.ut-section:last-child { border-bottom: none; }
.ut-section__title {
  margin: 0 0 var(--space-4);
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.ut-section__title span {
  width: 4px;
  height: 16px;
  border-radius: 2px;
  background: var(--accent);
}
.ut-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-5);
}
.ut-form-grid--1 { grid-template-columns: 1fr; }
@media (max-width: 768px) {
  .ut-form-grid { grid-template-columns: 1fr; }
}
.ut-required::after {
  content: " *";
  color: var(--danger);
}
.ut-char-count {
  text-align: right;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Segmented control */
.ut-seg {
  display: inline-flex;
  padding: 3px;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  gap: 2px;
}
.ut-seg button {
  padding: 8px 18px;
  border: none;
  border-radius: 5px;
  background: transparent;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.ut-seg button.is-active {
  background: var(--bg-surface);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

/* Rule insight & toolbar */
.ut-rule-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.ut-rule-insight {
  flex: 1;
  min-width: 280px;
  padding: var(--space-4);
  background: var(--accent-muted);
  border: 1px solid rgba(30, 94, 255, 0.15);
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-primary);
}
.ut-rule-insight strong {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--space-2);
}
.ut-rule-insight em {
  font-style: normal;
  color: var(--text-secondary);
}
.ut-rule-estimate {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}
.ut-rule-estimate__num {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.ut-rule-time-block {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 4px 8px;
  background: var(--warning-bg);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(217, 119, 6, 0.2);
}
.ut-rule-time-block label {
  font-size: 11px;
  font-weight: 700;
  color: var(--warning);
  white-space: nowrap;
}
.ut-rule-type-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  padding: 2px 6px;
  background: var(--bg-subtle);
  border-radius: 4px;
  white-space: nowrap;
}

/* Rule builder */
.ut-rule-panel {
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--bg-muted);
  padding: var(--space-4);
}
.ut-rule-logic {
  display: flex;
  gap: var(--space-3);
  align-items: stretch;
}
.ut-rule-logic__op {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 44px;
  flex-shrink: 0;
}
.ut-rule-logic__op {
  gap: 6px;
}
.ut-logic-switch {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
}
.ut-logic-switch button {
  width: 40px;
  padding: 8px 4px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  font-family: inherit;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.ut-logic-switch button.is-active[data-logic="and"] {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}
.ut-logic-switch button.is-active[data-logic="or"] {
  background: var(--warning);
  border-color: var(--warning);
  color: #fff;
}
.ut-rule-logic__op-label {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}
.ut-source-locked {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 12px;
  background: var(--bg-subtle);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
}
.ut-source-locked .ut-chip {
  cursor: default;
}
.ut-banner {
  padding: 10px 14px;
  margin-bottom: var(--space-4);
  border-radius: var(--radius-sm);
  font-size: 13px;
  background: var(--accent-muted);
  color: var(--accent);
  border: 1px solid rgba(30, 94, 255, 0.2);
}
.ut-banner--warn {
  background: var(--warning-bg);
  color: var(--warning);
  border-color: rgba(217, 119, 6, 0.25);
}
.ut-rule-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
}
.ut-rule-row__type {
  width: 116px;
  flex-shrink: 0;
}
.ut-rule-row__body {
  flex: 1;
  min-width: 200px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}
.ut-rule-body {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
}
.ut-rule-body[hidden] {
  display: none !important;
}
.ut-cmp {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.ut-cmp__label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  white-space: nowrap;
}
.ut-cmp__unit,
.ut-cmp__sep {
  font-size: 12px;
  color: var(--text-muted);
}
.ut-cmp-time {
  padding: 4px 8px;
  background: var(--warning-bg);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(217, 119, 6, 0.2);
}
.ut-cmp-compare {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.ut-cmp-event-metric {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.ut-rule-logic__body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.ut-rule-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
}
.ut-rule-row .ut-select { min-width: 100px; max-width: 160px; }
.ut-rule-row .ut-input { width: 120px; }
.ut-rule-nested {
  margin: var(--space-2) 0 var(--space-2) var(--space-5);
  padding: var(--space-3) var(--space-4);
  border-left: 3px solid var(--border-strong);
  background: var(--bg-muted);
  border-radius: var(--radius-sm);
  width: 100%;
}
.ut-rule-group-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.ut-rule-group-head__left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.ut-rule-group-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.ut-rule-group-foot {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px dashed var(--border-default);
}
.ut-rule-list-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-left: auto;
}
.ut-rule-actions {
  margin-left: auto;
  display: flex;
  gap: var(--space-2);
}

/* Split layout (history) */
.ut-split {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 520px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-surface);
}
@media (max-width: 900px) {
  .ut-split { grid-template-columns: 1fr; }
}
.ut-split__side {
  border-right: 1px solid var(--border-default);
  background: var(--bg-muted);
  display: flex;
  flex-direction: column;
}
.ut-split__side-head {
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-default);
}
.ut-version-list {
  list-style: none;
  margin: 0;
  padding: var(--space-2);
  flex: 1;
  overflow-y: auto;
}
.ut-version-list li button {
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.ut-version-list li button:hover { background: var(--bg-subtle); }
.ut-version-list li button.is-active {
  background: var(--accent-muted);
  color: var(--accent);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--accent);
}
.ut-split__main { display: flex; flex-direction: column; min-width: 0; }

/* Data access */
.ut-endpoint-card {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-6);
}
.ut-endpoint-row {
  display: flex;
  gap: var(--space-3);
  align-items: stretch;
}
.ut-endpoint-row .ut-input {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  height: 44px;
}
.ut-copy-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  padding: 10px 20px;
  background: var(--text-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  opacity: 0;
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
  z-index: 100;
  pointer-events: none;
}
.ut-copy-toast.is-show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Drawer */
.ut-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  z-index: 80;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease);
}
.ut-drawer-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}
.ut-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(480px, 100vw);
  height: 100vh;
  background: var(--bg-surface);
  border-left: 1px solid var(--border-default);
  box-shadow: var(--shadow-md);
  z-index: 90;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.22s var(--ease);
}
.ut-drawer.is-open { transform: translateX(0); }
.ut-drawer__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-5);
  border-bottom: 1px solid var(--border-default);
}
.ut-drawer__head h2 {
  margin: 0 0 var(--space-2);
  font-size: 16px;
  font-weight: 700;
}
.ut-drawer__head p {
  margin: 0;
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  word-break: break-all;
}
.ut-drawer__body {
  flex: 1;
  overflow: auto;
  padding: var(--space-4) var(--space-5);
}
.ut-drawer__foot {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-default);
  font-size: 12px;
  color: var(--text-muted);
}

/* Empty / dropdown menu */
.ut-dropdown { position: relative; display: inline-block; }
.ut-dropdown__menu {
  position: absolute;
  right: 0;
  top: calc(100% + 4px);
  min-width: 140px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  padding: 4px;
  z-index: 50;
  display: none;
}
.ut-dropdown.is-open .ut-dropdown__menu { display: block; }
.ut-dropdown__menu button,
.ut-dropdown__menu a {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 12px;
  border: none;
  background: none;
  font-family: inherit;
  font-size: 13px;
  color: var(--text-primary);
  cursor: pointer;
  border-radius: 4px;
  text-decoration: none;
}
.ut-dropdown__menu button:hover,
.ut-dropdown__menu a:hover { background: var(--bg-subtle); }

/* Chips (multi-select tags) */
.ut-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px 8px;
  min-height: 36px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
}
.ut-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: var(--accent-muted);
  color: var(--accent);
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
}
.ut-chip button {
  border: none;
  background: none;
  color: inherit;
  cursor: pointer;
  padding: 0;
  font-size: 14px;
  line-height: 1;
}

/* Toast empty state */
.ut-empty {
  padding: var(--space-7) var(--space-5);
  text-align: center;
  color: var(--text-muted);
}
.ut-empty__title { font-weight: 600; color: var(--text-secondary); margin-bottom: var(--space-2); }

/* Index hub */
.ut-hub {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-7) var(--space-5);
}
.ut-hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
}
.ut-hub-card {
  padding: var(--space-5);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.ut-hub-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.ut-hub-card h2 { margin: 0 0 var(--space-2); font-size: 16px; }
.ut-hub-card p { margin: 0; font-size: 13px; color: var(--text-secondary); }