:root {
  --yd-ink: #171717;
  --yd-muted: #60646c;
  --yd-line: #d6d9de;
  --yd-soft-line: #eceff3;
  --yd-bg: #fbfbf8;
  --yd-panel: #ffffff;
  --yd-corner: #f2b94b;
  --yd-row: #a9d7c8;
  --yd-column: #b9c7ed;
  --yd-nested: #0a8f78;
  --yd-ordinary: #717783;
  --yd-alert: #d7674e;
}

* {
  box-sizing: border-box;
}

body.playground-page {
  margin: 0;
  min-height: 100vh;
  background: var(--yd-bg);
  color: var(--yd-ink);
  font-family: "Noto Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.playground-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.1rem clamp(1rem, 3vw, 2rem);
}

.playground-nav a {
  color: var(--yd-ink);
  text-decoration: none;
}

.nav-brand {
  font-family: "Google Sans", "Noto Sans", sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: flex-end;
  font-size: 0.92rem;
}

.nav-language {
  display: inline-flex;
  gap: 0.35rem;
  align-items: center;
  position: relative;
  z-index: 10;
}

.nav-language a,
.nav-language span {
  display: inline-flex;
  min-height: 1.8rem;
  align-items: center;
  border: 1px solid var(--yd-line);
  border-radius: 6px;
  padding: 0 0.45rem;
  color: var(--yd-muted);
  font-size: 0.8rem;
  font-weight: 700;
  pointer-events: auto;
}

.nav-language .is-active {
  border-color: var(--yd-ink);
  background: var(--yd-ink);
  color: #fff;
}

.nav-links a {
  color: var(--yd-muted);
}

.nav-links a:hover,
.nav-brand:hover {
  color: var(--yd-nested);
}

.playground-shell {
  width: min(1280px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 0 0 2.5rem;
}

.playground-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 34rem);
  gap: clamp(1rem, 4vw, 3rem);
  align-items: end;
  padding: 1.25rem 0 1rem;
}

.playground-heading h1 {
  margin: 0;
  font-family: "Google Sans", "Noto Sans", sans-serif;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.02;
  letter-spacing: 0;
}

.playground-heading p {
  margin: 0;
  color: var(--yd-muted);
  line-height: 1.65;
}

.eyebrow {
  margin-bottom: 0.55rem !important;
  color: var(--yd-nested) !important;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
  font-size: 0.76rem;
}

.math {
  white-space: nowrap;
}

.yd-app {
  display: grid;
  grid-template-columns: 17rem minmax(24rem, 1fr) 24rem;
  gap: 1rem;
  align-items: stretch;
}

.yd-panel,
.yd-stage,
.yd-details {
  background: var(--yd-panel);
  border: 1px solid var(--yd-line);
  border-radius: 8px;
  box-shadow: 0 12px 40px rgba(25, 29, 35, 0.05);
}

.yd-controls {
  display: grid;
  align-content: start;
  gap: 1rem;
}

.yd-panel {
  padding: 1rem;
}

.yd-panel h2,
.yd-details h2 {
  margin: 0 0 0.8rem;
  font-size: 0.92rem;
  font-weight: 700;
}

.yd-label,
.yd-kicker {
  display: block;
  color: var(--yd-muted);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0;
}

.yd-label {
  text-transform: uppercase;
}

.yd-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.9rem;
}

.yd-select,
.yd-row-inputs input {
  width: 100%;
  min-height: 2.35rem;
  border: 1px solid var(--yd-line);
  border-radius: 6px;
  background: #fff;
  color: var(--yd-ink);
  font: inherit;
}

.yd-select {
  margin-top: 0.35rem;
  padding: 0 0.55rem;
}

.yd-row-inputs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
  margin-top: 0.55rem;
}

.yd-row-inputs input {
  padding: 0 0.4rem;
  text-align: center;
}

.yd-icon-buttons {
  display: flex;
  gap: 0.35rem;
}

.yd-icon-button {
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--yd-line);
  border-radius: 6px;
  background: #fff;
  color: var(--yd-ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.yd-icon-button:hover,
.yd-corner-button:hover,
.yd-tab:hover {
  border-color: var(--yd-nested);
  color: var(--yd-nested);
}

.yd-corner-list {
  display: grid;
  gap: 0.45rem;
}

.yd-corner-button {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.7rem;
  min-height: 2.45rem;
  border: 1px solid var(--yd-line);
  border-radius: 6px;
  background: #fff;
  color: var(--yd-ink);
  padding: 0 0.65rem;
  font: inherit;
  cursor: pointer;
}

.yd-corner-button.is-active {
  border-color: #ce9a2e;
  background: #fff7e4;
}

.yd-toggle {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 2rem;
  color: var(--yd-ink);
  cursor: pointer;
}

.yd-toggle input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--yd-nested);
}

.yd-stage {
  display: grid;
  grid-template-rows: auto minmax(24rem, 1fr) auto;
  overflow: hidden;
}

.yd-stage-topline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  padding: 1rem;
  border-bottom: 1px solid var(--yd-soft-line);
}

.yd-stage-topline strong {
  display: block;
  margin-top: 0.15rem;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.yd-svg-wrap {
  min-height: 24rem;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.yd-svg {
  width: 100%;
  max-width: 720px;
  height: auto;
  touch-action: manipulation;
}

.yd-grid-cell {
  fill: #fff;
  stroke: #d4d6da;
  stroke-width: 1;
}

.yd-box {
  fill: #ffffff;
  stroke: #151515;
  stroke-width: 2.5;
  cursor: pointer;
}

.yd-box.is-row-zone {
  fill: #e4f3ee;
}

.yd-box.is-column-zone {
  fill: #e8eefc;
}

.yd-box.is-corner {
  fill: #ffe0a3;
  stroke: #141414;
}

.yd-box.is-selected {
  stroke: var(--yd-alert);
  stroke-width: 3.2;
}

.yd-addable {
  fill: rgba(242, 185, 75, 0.12);
  stroke: #c99737;
  stroke-width: 2;
  stroke-dasharray: 6 5;
  pointer-events: none;
}

.yd-dot {
  fill: #111;
  pointer-events: none;
}

.yd-corner-dot {
  fill: #ce8d17;
  stroke: #fff;
  stroke-width: 2;
  pointer-events: none;
}

.yd-arrow {
  fill: none;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  pointer-events: none;
}

.yd-arrow.ordinary {
  stroke: var(--yd-ordinary);
  stroke-dasharray: 7 6;
  opacity: 0.7;
}

.yd-arrow.nested-h {
  stroke: var(--yd-nested);
}

.yd-arrow.nested-v {
  stroke: var(--yd-alert);
}

.yd-axis-label {
  fill: var(--yd-muted);
  font-size: 12px;
  font-weight: 700;
}

.yd-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem 1rem;
  padding: 0.85rem 1rem 1rem;
  border-top: 1px solid var(--yd-soft-line);
  color: var(--yd-muted);
  font-size: 0.82rem;
}

.legend-swatch,
.legend-line {
  display: inline-block;
  vertical-align: middle;
  margin-right: 0.35rem;
}

.legend-swatch {
  width: 0.9rem;
  height: 0.9rem;
  border: 1px solid var(--yd-line);
}

.legend-swatch.corner {
  background: #ffe0a3;
  border-color: #ce9a2e;
}

.legend-swatch.row {
  background: #e4f3ee;
}

.legend-swatch.column {
  background: #e8eefc;
}

.legend-line {
  width: 1.4rem;
  height: 0;
  border-top: 3px solid var(--yd-nested);
}

.legend-line.ordinary {
  border-top-color: var(--yd-ordinary);
  border-top-style: dashed;
}

.yd-details {
  overflow: hidden;
}

.yd-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--yd-soft-line);
}

.yd-tab {
  min-height: 3rem;
  border: 0;
  border-right: 1px solid var(--yd-soft-line);
  background: #fff;
  color: var(--yd-muted);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.yd-tab:last-child {
  border-right: 0;
}

.yd-tab.is-active {
  color: var(--yd-ink);
  background: #f5faf8;
  box-shadow: inset 0 -3px 0 var(--yd-nested);
}

.yd-tab-panel {
  display: none;
  padding: 1rem;
  max-height: 37.5rem;
  overflow: auto;
}

.yd-tab-panel.is-active {
  display: block;
}

.yd-definition-list {
  display: grid;
  gap: 0.85rem;
  margin: 0;
}

.yd-definition-list dt {
  margin: 0 0 0.25rem;
  color: var(--yd-muted);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
}

.yd-definition-list dd {
  margin: 0;
  color: var(--yd-ink);
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.yd-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.yd-pill {
  display: inline-flex;
  align-items: center;
  min-height: 1.7rem;
  border: 1px solid var(--yd-line);
  border-radius: 999px;
  padding: 0 0.55rem;
  background: #fff;
  color: var(--yd-ink);
  font-size: 0.85rem;
  white-space: nowrap;
}

.yd-pill.is-accent {
  border-color: #ce9a2e;
  background: #fff7e4;
}

.yd-pill.is-shift {
  border-color: #8fc5b6;
  background: #edf8f4;
}

.yd-weight-summary {
  display: grid;
  gap: 0.75rem;
}

.yd-weight-big {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.yd-weight-card {
  border: 1px solid var(--yd-line);
  border-radius: 8px;
  padding: 0.85rem;
  background: #fff;
}

.yd-weight-card h3 {
  margin: 0 0 0.55rem;
  font-size: 0.9rem;
}

.yd-weight-pair {
  display: grid;
  gap: 0.35rem;
  color: var(--yd-muted);
  font-size: 0.9rem;
}

.yd-weight-pair strong {
  color: var(--yd-ink);
}

.yd-status {
  display: inline-block;
  margin-top: 0.55rem;
  border-radius: 999px;
  padding: 0.18rem 0.5rem;
  color: #fff;
  font-size: 0.76rem;
  font-weight: 700;
}

.yd-status.changed {
  background: var(--yd-alert);
}

.yd-status.same {
  background: var(--yd-muted);
}

.yd-mini-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}

.yd-mini-table th,
.yd-mini-table td {
  border-bottom: 1px solid var(--yd-soft-line);
  padding: 0.55rem 0.35rem;
  text-align: left;
  vertical-align: top;
}

.yd-mini-table th {
  color: var(--yd-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0;
}

.yd-mini-table tr.is-selected td {
  background: #fff7e4;
}

.yd-preview-section {
  margin-top: 3rem;
}

.yd-preview-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 26rem);
  gap: 1.5rem;
  align-items: center;
  border-top: 1px solid var(--yd-line);
  border-bottom: 1px solid var(--yd-line);
  padding: 1.5rem 0;
}

.yd-preview-copy h3 {
  margin: 0 0 0.45rem;
  font-size: 1.35rem;
  font-weight: 700;
}

.yd-preview-copy p {
  margin: 0 0 0.9rem;
  color: var(--yd-muted);
  line-height: 1.6;
}

.yd-preview-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.25rem;
  border: 1px solid var(--yd-line);
  border-radius: 6px;
  padding: 0 0.8rem;
  color: var(--yd-ink);
  text-decoration: none;
  font-weight: 700;
}

.yd-preview-link:hover {
  border-color: var(--yd-nested);
  color: var(--yd-nested);
}

.yd-preview-figure {
  display: grid;
  place-items: center;
}

.yd-preview-figure svg {
  width: min(100%, 25rem);
  height: auto;
}

@media (max-width: 1120px) {
  .yd-app {
    grid-template-columns: 16rem minmax(0, 1fr);
  }

  .yd-details {
    grid-column: 1 / -1;
  }
}

@media (max-width: 780px) {
  .playground-nav,
  .playground-heading,
  .yd-app,
  .yd-stage-topline,
  .yd-preview-band {
    grid-template-columns: 1fr;
  }

  .playground-nav {
    align-items: flex-start;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .playground-shell {
    width: min(100vw - 1rem, 1280px);
  }

  .playground-heading {
    padding-top: 0.5rem;
  }

  .yd-stage {
    grid-template-rows: auto minmax(18rem, 1fr) auto;
  }

  .yd-svg-wrap {
    min-height: 18rem;
    padding: 0.5rem;
  }

  .yd-tabs {
    grid-template-columns: 1fr;
  }

  .yd-tab {
    border-right: 0;
    border-bottom: 1px solid var(--yd-soft-line);
  }

  .yd-weight-big {
    grid-template-columns: 1fr;
  }
}