main.css

html,
body {
  min-height: 100%;
  height: 100%
}

h1 {
  font-size: 60px;
}

body {
  margin: 0;
  font-family: monospace;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  overflow: hidden;
}

button {
  width: 160px;
  padding: 10px 20px;
  border-radius: 10px;
  border: none;
  font-family: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
}

#canvasContainer {
  height: 100%;
}

#headerContainer {
  width: 100vw;
  height: 10vh;
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-direction: row;
  background: rgba(82, 115, 77, 0.6);
}

#menuContainer {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  background: rgba(145, 199, 136, 0.75);
}

#menuContainer button {
  margin-bottom: 10px;
}

#toolbarContainer {
  display: flex;
  right: 10px;
  bottom: 10px;
  font-size: 24px;
}

#toolbarContainer button {
  width: 40px;
  margin-left: 15px;
}

.aim {
  font-size: 72px;
  margin: 0;
  padding: 0;
  line-height: 0;
}

.position-absolute {
  position: absolute;
}

.hidden {
  display: none !important;
}