* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, sans-serif;
  background: #f6f4ef;
  color: #222;
}
main { width: 100%; max-width: 32rem; padding: 1.5rem; text-align: center; }
.etiquette { text-transform: uppercase; letter-spacing: .1em; font-size: .9rem; color: #666; }
h1 { font-size: 2.5rem; margin: .5rem 0 1rem; }
#definition { font-size: 1.25rem; line-height: 1.5; }
#phrase { font-size: 1rem; line-height: 1.5; font-style: italic; color: #666; margin: .75rem 0 0; }
#phrase[hidden] { display: none; }
button {
  margin-top: 1.5rem;
  min-height: 3.5rem;
  min-width: 12rem;
  padding: .75rem 2rem;
  font-size: 1.25rem;
  border: 0;
  border-radius: .75rem;
  background: #2b5d8a;
  color: #fff;
  cursor: pointer;
}
button:active { background: #1f4568; }
.texte { font-size: 1.15rem; line-height: 1.6; }
.lien { display: inline-block; margin-top: 1.5rem; padding: .75rem 1rem; font-size: 1.1rem; color: #2b5d8a; }
#message { min-height: 1.5rem; margin: .75rem 0 0; font-size: 1rem; color: #2b5d8a; }