body {
  margin: 0;
  font-family: sans-serif;
  background: #0b0b0d;
  color: #fff;
}

.sandbox-container {
  display: flex;
  height: 100vh;
  gap: 10px;
  padding: 10px;
  box-sizing: border-box;
}

.editor-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.tabs {
  display: flex;
  gap: 4px;
}

.tab {
  padding: 6px 10px;
  background: #111;
  border: none;
  color: #aaa;
  cursor: pointer;
  border-radius: 6px;
}

.tab.active {
  background: #222;
  color: #5eead4;
}

textarea {
  flex: 1;
  width: 100%;
  resize: none;
  background: #07101a;
  color: #d6eef6;
  border: none;
  border-radius: 6px;
  padding: 8px;
  font-family: monospace;
  font-size: 14px;
  line-height: 1.4;
}

.controls {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

.btn {
  background: #111;
  border: 1px solid #333;
  color: #5eead4;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
}

.preview-panel {
  flex: 1;
}

.preview-panel iframe {
  width: 100%;
  height: 100%;
  border-radius: 6px;
  border: 1px solid #333;
  background: #000;
}