* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  display: flex;
  min-height: 100vh;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  background-color: #333;
  font-family: Arial, Helvetica, sans-serif;
}

h1 {
  color: #fff;
  margin-bottom: 20px;
}

#board {
  border: 2px solid #000;
  background-color: #fff;
  cursor: crosshair;
}

.colorArea {
  width: 800px;
  display: flex;
}
.color {
  flex: 1;
  height: 40px;
  cursor: pointer;
}
.color.active {
  border: 5px solid #fff;
}

.clear {
  border: 1px solid #000;
  background-color: rgba(0, 0, 0, 0.2);
  color: #fff;
  padding: 10px;
  margin-top: 20px;
  cursor: pointer;
}

footer {
  margin-top: 20px;
  color: #fff;
  font-size: 13px;
}

footer a {
  text-decoration: none;
  color: #fff;
  font-size: 13px;
}