:root {
  color-scheme: light;
  --bg: #f3f5f7;
  --panel: #ffffff;
  --ink: #17202a;
  --muted: #667085;
  --line: #d7dde5;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-soft: #dbeafe;
  --warn: #b35f10;
  --danger: #b3261e;
  --danger-soft: #f7dedb;
  --notice: #475569;
  --notice-soft: #e8edf5;
  --shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", "Segoe UI", Arial, sans-serif;
}

button,
textarea {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  padding: 24px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(340px, 430px) minmax(0, 1fr);
  gap: 18px;
  max-width: 1500px;
  margin: 0 auto;
}

.input-pane,
.result-pane {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.input-pane {
  position: sticky;
  top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: calc(100vh - 48px);
  padding: 18px;
}

.result-pane {
  min-height: calc(100vh - 48px);
  padding: 18px;
}

.pane-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.header-actions {
  display: flex;
  gap: 8px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 24px;
  line-height: 1.15;
}

.pane-header p,
.empty-state p {
  margin-top: 6px;
  color: var(--muted);
  line-height: 1.5;
}

.field-label,
.metric-label {
  color: var(--muted);
  font-size: 13px;
}

textarea {
  width: 100%;
  min-height: 120px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px;
  color: var(--ink);
  background: #fbfcfb;
  line-height: 1.45;
  outline: none;
}

textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

#explainInput {
  flex: 1;
  min-height: 360px;
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 13px;
}

#schemaInput {
  min-height: 110px;
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 12px;
}

.actions,
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

button {
  border: 0;
  border-radius: 6px;
  cursor: pointer;
}

.primary-button,
.secondary-button {
  min-height: 40px;
  padding: 0 16px;
  font-weight: 700;
}

.primary-button {
  flex: 1;
  color: #fff;
  background: var(--accent);
}

.primary-button:hover {
  background: var(--accent-dark);
}

.secondary-button,
.icon-button,
.tab {
  color: var(--ink);
  background: #eef2f7;
}

.secondary-button:hover,
.icon-button:hover,
.tab:hover {
  background: #e4e9f1;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  font-size: 20px;
}

.text-icon {
  width: auto;
  min-width: 58px;
  padding: 0 8px;
  font-size: 12px;
  font-weight: 800;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.summary-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfcfe;
}

.summary-grid strong {
  display: block;
  margin-top: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 22px;
}

.insights {
  display: grid;
  gap: 8px;
  margin: 0 0 14px;
}

.insight {
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  padding: 10px 12px;
  background: #f8fbff;
  color: var(--ink);
  line-height: 1.45;
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.switch input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

.segmented {
  display: inline-grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 4px;
  border-radius: 8px;
  background: #eef2f7;
}

.tab {
  min-width: 72px;
  min-height: 32px;
  padding: 0 10px;
}

.tab.active {
  color: #fff;
  background: var(--accent);
}

.legend {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.legend i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.fast {
  background: #2f8f5b;
}

.medium {
  background: var(--warn);
}

.slow {
  background: var(--danger);
}

.empty-state {
  display: grid;
  place-content: center;
  min-height: 360px;
  text-align: center;
}

.view {
  display: none;
  margin-top: 16px;
}

.view.active {
  display: block;
}

#treeView {
  overflow-x: auto;
  padding: 0 0 18px;
}

.plan-grid {
  min-width: 1160px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.plan-row {
  display: grid;
  grid-template-columns: minmax(320px, 1.55fr) minmax(170px, 0.92fr) minmax(150px, 0.82fr) minmax(180px, 0.9fr) minmax(140px, 0.68fr) minmax(90px, 0.42fr) minmax(74px, 0.34fr) minmax(92px, 0.38fr);
  min-height: 46px;
  border-bottom: 1px solid var(--line);
}

.plan-row:last-child {
  border-bottom: 0;
}

.plan-row > div {
  min-width: 0;
  padding: 8px 10px;
  border-right: 1px solid #edf0f4;
}

.plan-row > div:last-child {
  border-right: 0;
}

.plan-header {
  position: sticky;
  top: 0;
  z-index: 2;
  min-height: 38px;
  background: #f6f8fb;
  color: #475467;
  font-size: 12px;
  font-weight: 800;
}

.plan-header > div {
  display: flex;
  align-items: center;
  padding-top: 10px;
  padding-bottom: 10px;
}

.plan-row:not(.plan-header):hover {
  background: #f8fbff;
}

.plan-row.selected {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
  background: #eef6ff !important;
}

.plan-row.focus-critical {
  background: #fff7f7;
}

.plan-row.focus-warning {
  background: #fffaf2;
}

.plan-row.focus-notice {
  background: #f8fbff;
}

.plan-operation-cell {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  padding-left: calc(10px + var(--depth) * 22px) !important;
}

.row-toggle {
  flex: 0 0 18px;
  width: 18px;
  height: 22px;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  font-size: 16px;
  line-height: 1;
}

.row-toggle:not(:disabled):hover {
  background: #e8eef8;
  color: var(--accent);
}

.row-toggle:disabled {
  cursor: default;
  opacity: 0.35;
}

.operation-wrap {
  display: grid;
  min-width: 0;
  gap: 2px;
}

.operation-text {
  overflow: hidden;
  color: var(--ink);
  font-weight: 780;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.operation-subtext {
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.plan-text-cell {
  overflow-wrap: anywhere;
  color: #344054;
  font-size: 13px;
}

.plan-metric-cell {
  display: block;
  align-items: center;
  min-width: 0;
  overflow: hidden;
  color: var(--ink);
  font-size: 13px;
  font-weight: 760;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.plan-time-cell {
  display: grid;
  min-width: 0;
  align-content: center;
  gap: 2px;
  color: var(--ink);
}

.time-primary {
  overflow: hidden;
  font-size: 13px;
  font-weight: 780;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.time-range {
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.plan-status-cell {
  display: flex;
  align-items: center;
}

.status-pill {
  display: inline-flex;
  max-width: 100%;
  border-radius: 999px;
  padding: 3px 8px;
  background: #eef2f7;
  color: #475467;
  overflow-wrap: anywhere;
  font-size: 12px;
  font-weight: 800;
}

.status-pill.focus-critical,
.status-pill.estimate-critical {
  background: var(--danger-soft);
  color: var(--danger);
}

.status-pill.focus-warning,
.status-pill.estimate-warning {
  background: #fff1dc;
  color: var(--warn);
}

.status-pill.focus-notice,
.status-pill.estimate-notice {
  background: var(--notice-soft);
  color: var(--notice);
}

.detail-popover {
  position: fixed;
  z-index: 1000;
  display: none;
  width: min(520px, calc(100vw - 24px));
  max-height: min(360px, calc(100vh - 24px));
  overflow: auto;
  border: 1px solid #c8d2df;
  border-radius: 8px;
  padding: 10px;
  background: #ffffff;
  box-shadow: 0 18px 46px rgba(15, 23, 42, 0.18);
  pointer-events: none;
}

.detail-popover.visible {
  display: grid;
  gap: 8px;
}

.detail-popover div {
  display: grid;
  gap: 3px;
}

.detail-popover span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.detail-popover strong {
  color: var(--ink);
  font-size: 13px;
  font-weight: 650;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.hotspot-row,
.index-row {
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 9px;
  background: #fff;
}

dt {
  color: var(--muted);
  font-size: 12px;
}

dd {
  margin: 4px 0 0;
  overflow-wrap: anywhere;
  font-weight: 650;
}

.hotspot-list,
.index-list {
  display: grid;
  gap: 8px;
}

.hotspot-row,
.index-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  align-items: stretch;
  gap: 8px;
}

.index-row {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.row-title {
  min-width: 0;
  overflow-wrap: anywhere;
  font-weight: 750;
}

.row-cell {
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-size: 13px;
}

.row-cell b {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 12px;
}

.hint {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

@media (max-width: 960px) {
  .app-shell {
    padding: 12px;
  }

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

  .input-pane {
    position: static;
    height: auto;
  }

  #explainInput {
    min-height: 300px;
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hotspot-row,
  .index-row {
    grid-template-columns: 1fr 1fr;
  }

  #treeView {
    padding-bottom: 20px;
  }

}

@media (max-width: 560px) {
  .summary-grid,
  .hotspot-row,
  .index-row {
    grid-template-columns: 1fr;
  }

  .toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .segmented {
    width: 100%;
  }

}