body {
  height: 100vh;
  margin: 0;
  padding: 0; }

.container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  height: 100%; }

.toolbar {
  position: absolute;
  top: 30px;
  right: 30px; }

#main-canvas {
  border: 2px solid black; }

#position-editor {
  position: absolute;
  top: 400px;
  left: 100px;
  background-color: white;
  padding: 15px;
  border: 2px solid #2c3e50;
  display: none; }

#position-editor input[type=text] {
  width: 60px; }

#beam-editor {
  position: absolute;
  top: 400px;
  left: 100px;
  background-color: white;
  padding: 15px;
  border: 2px solid #2c3e50;
  display: none; }

#beam-editor input[type=text] {
  width: 60px; }

.mode-menu {
  width: 100%;
  height: 36px;
  line-height: 35px;
  text-align: center; }

.mode-menu button {
  margin: 0px 20px; }