style.css

@import url("https://fonts.googleapis.com/css2?family=Roboto&display=swap");
body {
  background-color: black;
  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;
  font-family: "Roboto", sans-serif;
}
h3 {
  color: #fff;
}
.rules {
  color: #fff;
}
.grid {
  display: flex;
  width: 300px;
  height: 300px;
  background-color: rgb(37, 69, 198);
  flex-wrap: wrap;
  border: 1px solid;
}

.grid div {
  width: 20px;
  height: 20px;
}

.shooter {
  background-color: rgba(255, 255, 255, 0.822);
}

.invader {
  background-color: rgb(36, 180, 23);
  border-radius: 20px;
}

.boom {
  background-color: rgb(139, 9, 9);
}

.laser {
  background-color: #fff;
}

.gratitude {
  color: rgba(185, 31, 165, 0.603);
  padding: 10px;
  padding-left: 0;
  padding-right: 0;
  text-decoration: none;
}

.thanks {
  color: rgba(255, 255, 255, 0.603);
  padding: 10px;
}