body {
  font-family: sans-serif;
  display: flex;
  align-items: center;
  flex-direction: column;
  background-color: #d0dbe6f5;
  margin-top: 40px;
}

.header {
  margin-bottom: 20px;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  color: white;
  cursor: pointer;
  border-radius: 5px;
  background-color: blue;
  border: none;
}

#grid-container {
  display: flex;
  flex-wrap: wrap;
  width: 960px;
  height: 960px;
  border: 4px solid blue;
  background-color: white;
  box-shadow: 0 4px 8px rgb(0, 0, 0, 0.2);
}

.grid-square {
  box-sizing: border-box;
  border: 1px solid #eee;
}

.hovered {
  background-color: rgb(8, 180, 214);
}