styles.css

body {
  background-color: black;
}

#canvas {
  width: 100%;
  height: 100%;
  position: absolute;
  background-color: white;
  z-index: -1;
}

#connected-room-info {
  display: none;
}

button.selected {
  background-color: lightgray;
}

.top-bar {
  background-color: black;
  width: 100%;
  height: 36pt;
  float: left;
  display: flex;
  align-items: center;
  z-index: 999;
}

.dropdown {
  position: relative;
  display: inline-block;
  padding: 0.2%;
}

.dropdown-peers {
  background-color: #2f2f2f;
  color: white;
  font-size: 16px;
  border: none;
  cursor: pointer;
  border-radius: 4px;
  transition-duration: 0.4s;
}

.peers {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
  z-index: 999;
  padding: 16px;
}

.peers a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

.peers a:hover {
  background-color: #f1f1f1;
}

#connected-peers {
  white-space: nowrap;
  list-style: none;
  padding: 0 0 4px 0;
  margin: 0;
}

#connected-peers li {
  border-bottom: 1px solid black;
  padding: 4px 0;
}

#connected-peers li:last-child {
  border-bottom-width: 0px;
}

.dropdown:hover .peers {
  display: block;
}

.dropdown:hover .dropdown-peers {
  background-color: #4f4f4f;
}

#room-id {
  flex: 1;
  padding: 10px;
  box-sizing: border-box;
  opacity: 0.8;
}

#room-connect {
  background-color: #2f2f2f;
  color: white;
  padding: 12px;
  font-size: 16px;
  border: none;
  cursor: pointer;
  border-radius: 4px;
}

#pen-tool {
  background-color: #2f2f2f;
  color: white;
  padding: 10px;
  font-size: 16px;
  border: none;
  cursor: pointer;
  border-radius: 50%;
}

#pen-tool:hover {
  background-color: #4f4f4f;
  transition-duration: 0.4s;
}

#eraser-tool {
  background-color: #2f2f2f;
  color: white;
  padding: 10px;
  font-size: 16px;
  border: none;
  cursor: pointer;
  border-radius: 50%;
}

#eraser-tool:hover {
  background-color: #4f4f4f;
  transition-duration: 0.4s;
}