html, body {
  margin: 0;
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

#topbar {
  height: 44px;
  line-height: 44px;
  padding-left: 16px;
  background: #111;
  color: #fff;
  font-weight: 500;
}

#map {
  height: calc(100% - 44px);
}

/* 右键菜单 */
#context-menu {
  position: absolute;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  overflow: hidden;
  z-index: 2000;
}

#context-menu div {
  padding: 10px 16px;
  cursor: pointer;
}

#context-menu div:hover {
  background: #f2f2f2;
}

.hidden {
  display: none;
}

/* 面板 */
#panel {
  position: absolute;
  right: 0;
  top: 44px;
  width: 360px;
  height: calc(100% - 44px);
  background: #fff;
  box-shadow: -2px 0 10px rgba(0,0,0,0.2);
  overflow-y: auto;
  padding: 12px;
}