.main-wrapper {
  display: flex;
  height: 80vh;
  font-family: sans-serif;
}
.left-panel, .center-panel, .right-panel {
  padding: 10px;
  overflow-y: auto;
}
.left-panel {
  width: 25%;
  background: #1c1c1c;
  color: #fff;
}
.center-panel {
  width: 40%;
  background: #2c2c2c;
  color: #fff;
}
.right-panel {
  width: 35%;
  background: #111;
  color: #fff;
}
.editor-panel {
  padding: 10px;
  background: #333;
  color: #fff;
}
.overlay-list {
  list-style: none;
  padding: 0;
}
.overlay-item {
  padding: 6px 8px;
  margin: 4px 0;
  background: #444;
  border-left: 4px solid transparent;
  cursor: pointer;
}
.overlay-item:hover {
  background: #555;
}
.overlay-item.active {
  background: #666;
}
.status-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 6px;
}
.status-dot.red { background: red; }
.status-dot.purple { background: purple; }
.status-dot.blue { background: blue; }
.preview-box, .output-box {
  height: 200px;
  background: #000;
  margin-top: 10px;
  padding: 10px;
  color: #0f0;
}
.editor-panel input[type=text], .editor-panel textarea {
  width: 100%;
  margin-bottom: 6px;
}