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

body,
html {
  height: 100%;
  font-family: sans-serif;
}

.container {
  display: grid;
  grid-template-columns: 1fr 550px;
  height: 100vh;
}

.result {
  padding: 1rem;
  background: #f5f5f5;
  overflow: auto;
}

.editor {
  display: flex;
  flex-direction: column;
  background: #222;
  color: #fff;
  padding: 0;
}

.editor textarea {
  flex: 1;
  width: 100%;
  padding: 1rem;
  font-family: monospace;
  font-size: 14px;
  background: #1e1e1e;
  color: #e0e0e0;
  border: none;
  outline: none;
  resize: none;
}

.editor .CodeMirror {
  height: 100vh;
}

iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: white;
}

.editor-header {
  padding: 0.5rem 1rem;
  background: #333;
  font-weight: bold;
}