body.m2-lab-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;
}

.m2-shell {
  padding-bottom: 2.5rem;
}

.m2-heading h1 {
  max-width: 10ch;
}

.m2-lab {
  display: grid;
  grid-template-columns: 17rem minmax(24rem, 1fr);
  gap: 1rem;
  align-items: stretch;
}

.m2-panel {
  background: var(--yd-panel);
  border: 1px solid var(--yd-line);
  border-radius: 8px;
  box-shadow: 0 12px 40px rgba(25, 29, 35, 0.05);
  overflow: hidden;
}

.m2-panel-heading,
.m2-editor-topline,
.m2-runner-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid var(--yd-soft-line);
}

.m2-panel h2 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
}

.m2-panel-heading span,
.m2-status,
.m2-runner-footer,
.m2-description {
  color: var(--yd-muted);
  font-size: 0.86rem;
}

.m2-example-list {
  display: grid;
  gap: 0.55rem;
  padding: 1rem;
}

.m2-example-button {
  display: grid;
  gap: 0.25rem;
  width: 100%;
  min-height: 4.25rem;
  border: 1px solid var(--yd-line);
  border-radius: 8px;
  background: #fff;
  color: var(--yd-ink);
  padding: 0.7rem;
  text-align: left;
  cursor: pointer;
  font: inherit;
}

.m2-example-button strong {
  font-size: 0.9rem;
}

.m2-example-button span {
  color: var(--yd-muted);
  font-size: 0.78rem;
}

.m2-example-button:hover,
.m2-example-button.is-active {
  border-color: var(--yd-nested);
  background: #f5faf8;
}

.m2-editor-panel {
  min-width: 0;
}

.m2-chip {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  border-radius: 999px;
  background: #171717;
  color: #fff;
  padding: 0 0.65rem;
  font-size: 0.78rem;
  font-weight: 700;
}

.m2-description {
  margin: 0;
  padding: 1rem 1rem 0;
  line-height: 1.6;
}

.m2-code-label {
  display: block;
  margin: 1rem 1rem 0.35rem;
  color: var(--yd-muted);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

#m2-code {
  display: block;
  width: calc(100% - 2rem);
  min-height: 24rem;
  margin: 0 1rem;
  border: 1px solid var(--yd-line);
  border-radius: 8px;
  background: #111;
  color: #f8f8f2;
  padding: 1rem;
  resize: vertical;
  font: 0.92rem/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

.m2-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  padding: 1rem 1rem 0;
}

.m2-button,
.m2-icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 2.35rem;
  border: 1px solid var(--yd-line);
  border-radius: 6px;
  background: #fff;
  color: var(--yd-ink);
  padding: 0 0.8rem;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.m2-button.primary {
  border-color: var(--yd-ink);
  background: var(--yd-ink);
  color: #fff;
}

.m2-button:hover,
.m2-icon-button:hover {
  border-color: var(--yd-nested);
  color: var(--yd-nested);
}

.m2-button.primary:hover {
  border-color: var(--yd-nested);
  background: var(--yd-nested);
  color: #fff;
}

.m2-icon-button {
  width: 2.35rem;
  padding: 0;
}

.m2-status {
  min-height: 1.4rem;
  margin: 0;
  padding: 0.65rem 1rem 1rem;
}

.m2-runner-panel {
  grid-column: 1 / -1;
}

.m2-select {
  min-height: 2.2rem;
  border: 1px solid var(--yd-line);
  border-radius: 6px;
  background: #fff;
  color: var(--yd-ink);
  padding: 0 0.55rem;
  font: inherit;
}

#m2-runner-frame {
  display: block;
  width: 100%;
  min-height: 32rem;
  border: 0;
  background: #f4f5f6;
}

.m2-runner-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
  padding: 1rem;
  border-top: 1px solid var(--yd-soft-line);
}

.m2-preview-section {
  margin-top: 2.5rem;
}

.m2-preview-band {
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 29rem);
}

.m2-preview-terminal {
  overflow: hidden;
  border: 1px solid var(--yd-line);
  border-radius: 8px;
  background: #111;
  box-shadow: 0 18px 45px rgba(25, 29, 35, 0.08);
}

.m2-preview-bar {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  min-height: 2rem;
  padding: 0 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.m2-preview-bar span {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: #d7674e;
}

.m2-preview-bar span:nth-child(2) {
  background: #f2b94b;
}

.m2-preview-bar span:nth-child(3) {
  background: #0a8f78;
}

.m2-preview-terminal pre {
  margin: 0;
  min-height: 10rem;
  padding: 1rem;
  color: #f8f8f2;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 0.9rem/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (max-width: 940px) {
  .m2-lab,
  .m2-preview-band {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .m2-panel-heading,
  .m2-editor-topline,
  .m2-runner-topline,
  .m2-runner-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  #m2-code {
    min-height: 19rem;
  }

  #m2-runner-frame {
    min-height: 26rem;
  }
}