* {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  width: 100%;
  background: #ddd;
}

h1 {
  margin-bottom: 0.5em;
}

.content-main {
  max-width: 800px;
  margin: 0 auto;
  margin-top: 100px;
}

.game-container {
  background: white;
  padding: 1em;
}