.playground-wrap {
  width: min(calc(100% - 28px), 1380px);
  margin: 0 auto;
  padding: 28px 0 60px;
}

.playground-titlebar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.playground-titlebar h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -.035em;
}

.playground-titlebar p {
  margin: 5px 0 0;
  color: rgb(var(--muted));
}

.playground-engine-controls {
  display: grid;
  grid-template-columns: auto auto;
  gap: 5px 9px;
  align-items: center;
  justify-items: start;
}

.playground-engine-controls label {
  color: rgb(var(--muted-2));
  font-size: .67rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.playground-engine-controls select {
  min-width: 168px;
  height: 38px;
  border: 1px solid rgb(var(--border));
  border-radius: 10px;
  background: rgb(var(--bg-elevated));
  color: rgb(var(--fg));
  padding: 0 10px;
  font-size: .84rem;
}

.playground-engine-controls .engine-status {
  grid-column: 1 / -1;
}

.engine-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: rgb(var(--muted));
  font-size: .8rem;
  white-space: nowrap;
}

.engine-status::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 99px;
  background: rgb(var(--muted-2));
}

.engine-status.ready::before {
  background: rgb(var(--good));
  box-shadow: 0 0 0 4px rgba(var(--good), .12);
}

.engine-status.error::before {
  background: rgb(var(--danger));
  box-shadow: 0 0 0 4px rgba(var(--danger), .10);
}

.playground-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 14px;
  align-items: stretch;
}

.instrument {
  min-width: 0;
  overflow: hidden;
  border: 1px solid rgb(var(--border));
  border-radius: 16px;
  background: rgb(var(--bg-elevated));
}

.playground-source {
  display: flex;
  min-height: 520px;
  flex-direction: column;
}

.playground-source .editor-wrap {
  flex: 1 1 auto;
  min-height: 390px;
}

.playground-source .editor {
  height: 100%;
  min-height: 390px;
}

.playground-source .signature-bar {
  flex: 0 0 auto;
}

.instrument-head {
  display: flex;
  min-height: 46px;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 0 14px;
  border-bottom: 1px solid rgb(var(--border));
  background: rgba(var(--bg-soft), .55);
}

.instrument-head strong {
  font-size: .86rem;
}

.instrument-head span {
  color: rgb(var(--muted-2));
  font-size: .76rem;
}

.editor-wrap {
  position: relative;
}

.editor {
  display: block;
  width: 100%;
  height: 390px;
  resize: vertical;
  border: 0;
  outline: 0;
  padding: 18px 18px 70px;
  background: rgb(var(--bg-elevated));
  color: rgb(var(--fg));
  font-size: .92rem;
  line-height: 1.65;
  tab-size: 4;
}

.editor:focus {
  box-shadow: inset 0 0 0 2px rgba(var(--accent), .16);
}

.editor-actions {
  position: absolute;
  right: 14px;
  bottom: 13px;
  display: flex;
  gap: 8px;
}

.suggestion-box {
  position: absolute;
  z-index: 30;
  left: 16px;
  right: 16px;
  bottom: 54px;
  max-height: 220px;
  overflow: auto;
  border: 1px solid rgb(var(--border-strong));
  border-radius: 11px;
  background: rgb(var(--bg-elevated));
  box-shadow: 0 14px 35px rgba(var(--shadow), .16);
}

.suggestion-box[hidden] {
  display: none;
}

.suggestion {
  display: grid;
  width: 100%;
  grid-template-columns: 190px 1fr;
  gap: 12px;
  padding: 10px 12px;
  border: 0;
  border-bottom: 1px solid rgb(var(--border));
  background: transparent;
  color: rgb(var(--fg));
  text-align: left;
  cursor: pointer;
}

.suggestion:last-child {
  border-bottom: 0;
}

.suggestion:hover,
.suggestion.active {
  background: rgba(var(--accent), .08);
}

.suggestion code {
  color: rgb(var(--accent-deep));
  font-size: .8rem;
}

.suggestion span {
  color: rgb(var(--muted));
  font-size: .78rem;
}

.signature-bar {
  display: flex;
  min-height: 42px;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border-top: 1px solid rgb(var(--border));
  background: rgba(var(--bg-soft), .45);
  color: rgb(var(--muted));
  font-size: .79rem;
}

.signature-bar code {
  color: rgb(var(--accent-deep));
}

.output-tabs {
  display: flex;
  gap: 4px;
  padding: 8px;
  overflow-x: auto;
  border-bottom: 1px solid rgb(var(--border));
  background: rgba(var(--bg-soft), .45);
}

.output-tab {
  border: 0;
  border-radius: 8px;
  padding: 7px 9px;
  background: transparent;
  color: rgb(var(--muted));
  font-size: .78rem;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
}

.output-tab.active {
  background: rgb(var(--bg-elevated));
  color: rgb(var(--accent-deep));
  box-shadow: inset 0 0 0 1px rgb(var(--border));
}

.output-pane {
  display: none;
  min-height: 390px;
  padding: 18px;
  overflow: auto;
}

.output-pane.active {
  display: block;
}

.output-pane .codeblock {
  min-height: 0;
  margin: 0;
  border: 0;
  padding: 0;
  background: transparent;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.result-primary {
  color: rgb(var(--accent-deep));
  font-family: var(--mono);
  font-size: 1.08rem;
  word-break: break-word;
}

.result-meta {
  margin-top: 14px;
  color: rgb(var(--muted-2));
  font-size: .78rem;
}

.error-box {
  border: 1px solid rgba(var(--danger), .3);
  border-radius: 10px;
  padding: 12px;
  background: rgba(var(--danger), .07);
  color: rgb(var(--danger));
  font-family: var(--mono);
  font-size: .82rem;
  white-space: pre-wrap;
}

.tree-toolbar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  color: rgb(var(--fg));
  font-size: .84rem;
  font-weight: 720;
}

.tree-toolbar small {
  color: rgb(var(--muted-2));
  font-size: .73rem;
  font-weight: 500;
}

.tree-view {
  overflow: hidden;
  border: 1px solid rgb(var(--border));
  border-radius: 12px;
  background: rgba(var(--bg-soft), .42);
  font-family: var(--mono);
  font-size: .79rem;
  line-height: 1.45;
}

.tree-node + .tree-node {
  border-top: 1px solid rgba(var(--border), .72);
}

.tree-node details {
  margin: 0;
}

.tree-node summary,
.tree-leaf {
  min-height: 38px;
  padding: 9px 12px;
}

.tree-node summary {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style-position: inside;
}

.tree-node summary:hover,
.tree-leaf:hover {
  background: rgba(var(--accent), .055);
}

.tree-label {
  color: rgb(var(--accent-deep));
  font-weight: 720;
}

.tree-type {
  margin-left: auto;
  color: rgb(var(--muted-2));
  font-size: .72rem;
}

.tree-children {
  margin: 0 10px 10px 12px;
  overflow: hidden;
  border: 1px solid rgba(var(--border), .78);
  border-radius: 9px;
  background: rgb(var(--bg-elevated));
}

.tree-leaf {
  display: grid;
  grid-template-columns: minmax(90px, 150px) minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.tree-value {
  min-width: 0;
  color: rgb(var(--muted));
  overflow-wrap: anywhere;
}

.tree-empty {
  padding: 10px 12px;
  color: rgb(var(--muted-2));
}

.playground-plotter {
  margin-top: 16px;
}

.playground-plotter-head > div:first-child {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 2px;
}

.playground-plotter-head #plot-source {
  max-width: 780px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.playground-plotter-body {
  padding: 16px;
  background: rgb(var(--bg-elevated));
}

.plot-message {
  margin-bottom: 13px;
  color: rgb(var(--muted));
  font-size: .84rem;
}

.plot-controls {
  display: grid;
  gap: 14px;
  margin-bottom: 16px;
  padding: 14px;
  border: 1px solid rgb(var(--border));
  border-radius: 12px;
  background: rgba(var(--bg-soft), .48);
}

.plot-controls[hidden],
.plot-3d-options[hidden] {
  display: none;
}

.plot-control-grid,
.plot-3d-options {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.plot-3d-options {
  flex: 1;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.plot-mode-row {
  display: flex;
  align-items: end;
  gap: 16px;
}

.plot-control-grid label,
.plot-3d-options label,
.plot-fixed-field {
  display: grid;
  gap: 5px;
}

.plot-control-grid label > span,
.plot-3d-options label > span,
.plot-fixed-wrap > span,
.plot-fixed-field > span {
  color: rgb(var(--muted-2));
  font-size: .66rem;
  font-weight: 800;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.plot-control-grid input,
.plot-control-grid select,
.plot-3d-options input,
.plot-3d-options select,
.plot-fixed-field input {
  width: 100%;
  min-width: 0;
  height: 36px;
  border: 1px solid rgb(var(--border));
  border-radius: 9px;
  background: rgb(var(--bg-elevated));
  color: rgb(var(--fg));
  padding: 0 9px;
}

.plot-check {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 36px;
  color: rgb(var(--fg));
  font-size: .82rem;
  white-space: nowrap;
}

.plot-check input {
  accent-color: rgb(var(--accent));
}

.plot-fixed-wrap {
  display: grid;
  gap: 7px;
}

.plot-fixed-vars {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.plot-fixed-field {
  width: 120px;
}

.plot-fixed-empty {
  color: rgb(var(--muted));
  font-size: .8rem;
}

.plot-container {
  min-height: 420px;
  border: 1px solid rgb(var(--border));
  border-radius: 12px;
  overflow: hidden;
  background: rgb(var(--bg-soft));
}

.example-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 14px;
}

.example-chip {
  border: 1px solid rgb(var(--border));
  border-radius: 10px;
  padding: 11px 12px;
  background: rgb(var(--bg-elevated));
  text-align: left;
  cursor: pointer;
}

.example-chip strong {
  display: block;
  font-size: .78rem;
}

.example-chip code {
  display: block;
  margin-top: 5px;
  overflow: hidden;
  color: rgb(var(--muted));
  font-size: .72rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.example-chip:hover {
  border-color: rgba(var(--accent), .45);
}

@media (max-width: 980px) {
  .playground-grid {
    grid-template-columns: 1fr;
  }

  .playground-source {
    min-height: 460px;
  }

  .playground-source .editor-wrap,
  .playground-source .editor {
    min-height: 330px;
  }

  .plot-control-grid {
    grid-template-columns: 1fr 1fr;
  }

  .plot-mode-row {
    align-items: stretch;
    flex-direction: column;
  }

  .plot-3d-options {
    width: 100%;
  }

  .example-strip {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 620px) {
  .playground-engine-controls {
    width: 100%;
  }

  .playground-engine-controls select {
    width: 100%;
  }

  .tree-leaf {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .tree-type {
    display: none;
  }

  .plot-control-grid,
  .plot-3d-options {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .playground-titlebar {
    align-items: flex-start;
    flex-direction: column;
  }

  .example-strip {
    grid-template-columns: 1fr;
  }

  .suggestion {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}