styles.css

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: whitesmoke;
}

body {
  background-color: rgb(35, 35, 35);
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

header {
  text-align: center;
  line-height: 2;
}

p {
  font-size: 1.1rem;
}

main {
  margin: 1rem auto;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

button {
  padding: 1rem;
  font-size: 1rem;
  outline: none;
  border: 2px solid whitesmoke;
  border-radius: 5px;
  background-color: transparent;
  cursor: pointer;
  font-weight: bold;
}

button:hover,
button:focus {
  background-color: rgba(255, 255, 255, 0.21);
}

.hidden {
  display: none;
}