.testingGroundPage {
  max-width: var(--width-xxl);
}

.testingGroundCard {
  background-color: var(--secondary-bg);
  border-radius: var(--border-radius-md);
  color: var(--text-color);
  max-width: 90%;
  padding: var(--border-radius-xl);
}

.testingGroundIntro {
  margin-top: 0;
}

.testingGroundTopList {
  margin-top: var(--margin-base);
}

.testingGroundTopList ol {
  margin: var(--margin-xs) 0 0;
  padding-left: 1.4rem;
}

.testingGroundTopList li {
  font-size: var(--font-size-sm);
  margin-bottom: 0.25rem;
}

.testingGroundStatusGrid {
  display: grid;
  gap: 0.5em 1em;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: var(--margin-base);
}

.testingGroundStatusGrid p {
  font-size: var(--font-size-sm);
  margin: 0;
}

.testingGroundSelectionRow {
  align-items: center;
  display: flex;
  gap: var(--gap-sm);
  margin-top: var(--margin-base);
}

.testingGroundSelect {
  background-color: var(--main-bg);
  border: 1px solid var(--track-color);
  border-radius: var(--border-radius-sm);
  color: var(--text-color);
  flex: 1;
  font-size: var(--font-size-sm);
  min-width: 0;
  padding: var(--padding-sm);
}

.testingGroundModeButton:hover {
  transform: var(--hover-scale-sm);
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.testingGroundDetails {
  margin-top: var(--margin-base);
}

.testingGroundDetails h3 {
  margin-bottom: var(--margin-xs);
}

.testingGroundDetails p {
  font-size: var(--font-size-sm);
  margin: 0 0 var(--margin-xs);
}

.testingGroundMuted {
  color: var(--text-muted);
}

.testingGroundActionGrid {
  display: grid;
  gap: var(--gap-sm);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-top: var(--margin-base);
}

.testingGroundModeButton {
  align-items: center;
  background: #2a2752;
  border: none;
  border-radius: var(--border-radius-sm);
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  gap: var(--gap-xs);
  min-height: 120px;
  padding: var(--padding-base);
}

.testingGroundModeButtonB {
  background: #27434b;
}

.testingGroundModeButtonC {
  background: #413029;
}

.testingGroundModeButton.active {
  box-shadow: 0 0 0 2px var(--main-fg) inset;
}

.testingGroundModeLetter {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: var(--font-weight-bold);
  line-height: 1;
}

.testingGroundModeLabel {
  font-size: var(--font-size-sm);
  text-align: center;
}

.testingGroundError {
  color: var(--danger-fg);
  margin-top: var(--margin-base);
}

.testingGroundActiveSummary {
  margin-top: var(--margin-base);
}

@media only screen and (max-width: 768px) and (orientation: portrait) {
  .testingGroundCard {
    max-width: 100%;
  }

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

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

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