*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

#toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 16px;
  background: #fff;
  border-bottom: 1px solid #ddd;
}

#filename {
  font-size: 13px;
  color: #444;
  font-weight: 500;
}

#status {
  margin-left: auto;
  font-size: 12px;
  color: #999;
}

#editor { background: #f0f0f0; }