config.css

#config-overlay {
  text-align: center;
}

#config-overlay h2 {
  margin: 0.5rem 0;
}

.form.control {
  margin: 0.5rem 0;
}

.form-control label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: bold;
}

.form-control input {
  font: inherit;
  border: 1px solid rgb(204, 204, 204);
  width: 15rem;
  padding: 0.35rem;
}

.error label {
  color: rgb(136, 2, 2);
}

.error input {
  border-color: rgb(136, 2, 2);
  color: rgb(136, 2, 2);
  background-color: rgb(253, 219, 219);
}

#game-config {
  width: 90%;
  max-width: 40rem;
  margin: 3rem auto;
  text-align: center;
}

#game-config ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
}

#game-config li {
  margin: 1rem;
  padding: 1rem;
  width: 50%;
  background-color: rgb(229, 227, 255);
  border-radius: 4px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

#game-config h2 {
  font-size: 1rem;
  margin: 0.5rem 0;
}

#game-config h3 {
  font-size: 1.5rem;
  margin: 0.5rem 0;
  color: rgb(15, 4, 168);
}

.player-symbol {
  font-size: 2rem;
  font-weight: bold;
  color: rgb(18, 4, 82);
  margin: 0.5rem 0;
}