body {
  font-family: system-ui, sans-serif;
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
  line-height: 1.6;
}
.editable {
  border: 1px dashed #ccc;
  padding: 20px;
}

img {
    max-width: 100%;
    height: auto;
}