index.css

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu',
    'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New', monospace;
}

#root {
  padding: 1em;
}

textarea,
input[type='text'] {
  display: block;
  box-sizing: border-box;
  padding: 10px;
  width: 100%;
  resize: vertical;
  font-size: 13px;
  border: 1px solid var(--vscode-dropdown-border);
  background-color: var(--vscode-input-background);
  color: var(--vscode-input-foreground);
  font-family: var(--vscode-editor-font-family);
}

textarea {
  min-height: 100px;
  max-height: 500px;
}

textarea:focus {
  outline: 1px solid var(--vscode-focusBorder);
}

button.colored {
  background-color: var(--vscode-button-background);
  color: var(--vscode-button-foreground);
  border-radius: 0px;
  border: 1px solid transparent;
  outline: none;
  padding: 4px 12px;
  font-size: 13px;
  line-height: 18px;
  white-space: nowrap;
  user-select: none;
  cursor: pointer;
  opacity: 0.9;
}

button.colored:hover {
  opacity: 1;
}

button.colored.secondary {
  background-color: var(--vscode-button-secondaryBackground);
  color: var(--vscode-button-secondaryForeground);
}

button.colored:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

#status {
  box-sizing: border-box;
  line-height: 18px;
  background: var(--vscode-badge-background);
  color: var(--vscode-badge-foreground);
  border-radius: 4px;
  padding: 2px 8px;
  margin-right: 12px;
}