.code-runner {
  position: relative;
  margin: 1.5rem 0;
  border: 1px solid var(--ink-border);
  border-radius: 0.5rem;
  overflow: hidden;
}

.code-runner .code-runner-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 1rem;
  background: var(--code-bg);
  border-bottom: 1px solid var(--ink-border);
}

.code-runner .code-runner-header span {
  color: var(--brand-accent-1);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.code-runner .code-runner-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.code-runner .reset-btn {
  background: none;
  color: var(--ivory-muted);
  border: 1px solid var(--ink-border);
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  font-family: "Sora", sans-serif;
  font-size: 0.8rem;
  transition: all 0.2s;
}

.code-runner .reset-btn:hover {
  color: var(--ivory);
  border-color: var(--ivory-muted);
}

.code-runner .run-btn {
  background: var(--teal-dark);
  color: var(--ivory);
  border: none;
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  font-family: "Sora", sans-serif;
  font-size: 0.8rem;
  transition: background 0.2s;
}

.code-runner .run-btn:hover {
  background: var(--teal);
}

.code-runner .run-btn:disabled {
  background: var(--btn-disabled-bg);
  color: var(--btn-disabled-text);
  cursor: default;
}

.code-runner .run-btn.loading {
  background: var(--gold);
  color: var(--ink);
}

/* Override the default pre styling inside runner */
.code-runner pre {
  margin: 0;
  border-radius: 0;
  border: none;
  min-height: 100%;
  max-height: none;
  overflow: visible;
}

.code-runner pre code {
  font-size: 0.9rem;
  display: block;
  min-height: 100%;
}

/* Editable code area */
.code-runner pre[contenteditable] {
  outline: none;
  cursor: text;
}

.code-runner pre[contenteditable]:focus {
  background: var(--code-bg);
}

/* Output area */
.code-output {
  padding: 0.8rem 1rem;
  background: var(--ink);
  color: var(--brand-accent-2);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  border-top: 1px solid var(--ink-border);
  white-space: pre-wrap;
  display: none;
  max-height: 400px;
  overflow-y: auto;
}

.code-output.visible {
  display: block;
}

.code-output.error {
  color: var(--coral);
}

.code-output.success {
  border-top-color: var(--emerald);
}

/* Matplotlib output */
.code-output img {
  max-width: 100%;
  border-radius: 4px;
  margin-top: 0.5rem;
}

/* Pyodide loading banner */
#pyodide-loading {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  background: var(--code-bg);
  color: var(--gold);
  border: 1px solid var(--ink-border);
  border-radius: 0.5rem;
  padding: 0.6rem 1.2rem;
  font-family: "Sora", sans-serif;
  font-size: 0.85rem;
  z-index: 1000;
  display: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

#pyodide-loading.visible {
  display: block;
}

#pyodide-loading.ready {
  color: var(--emerald);
  border-color: var(--emerald);
}

/* Test runner button */
.code-runner .test-btn {
  background: var(--gold);
  color: var(--ink);
  border: none;
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  font-family: "Sora", sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  transition: background 0.2s;
}

.code-runner .test-btn:hover {
  background: var(--gold-hover);
}

.code-runner .test-btn:disabled {
  background: var(--btn-disabled-bg);
  color: var(--btn-disabled-text);
  cursor: default;
}

.code-runner .test-btn.loading {
  background: var(--gold);
  opacity: 0.7;
}

/* Test results panel */
.test-results {
  display: none;
  padding: 0.8rem 1rem;
  background: var(--ink);
  border-top: 1px solid var(--ink-border);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  line-height: 1.8;
}

.test-results.visible {
  display: block;
}

.test-result-item {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.test-result-item.pass .test-icon {
  color: var(--emerald);
}

.test-result-item.fail .test-icon {
  color: var(--coral);
}

.test-icon {
  font-weight: 700;
  flex-shrink: 0;
}

.test-label {
  color: var(--ivory);
}

.test-detail {
  color: var(--ivory-muted);
  font-size: 0.8rem;
}

.test-summary {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--ink-border);
  font-weight: 600;
}

.test-summary.all-pass {
  color: var(--emerald);
}

.test-summary.some-fail {
  color: var(--coral);
}