body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f7f6;
  color: #333;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  text-align: center;
}

header {
  background-color: #007bff;
  color: white;
  padding: 20px 0;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1 {
  margin: 0;
  font-size: 2.5em;
}

main {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

#pwa-advantage-text {
  font-size: 1.5em;
  color: #555;
  margin-bottom: 30px;
  max-width: 600px;
  line-height: 1.6;
  min-height: 80px; /* Pour éviter le saut de contenu lors du changement de texte */
  display: flex;
  align-items: center;
  justify-content: center;
}

.install-button {
  background-color: #28a745;
  color: white;
  border: none;
  padding: 15px 30px;
  font-size: 1.2em;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.install-button:hover {
  background-color: #218838;
  transform: translateY(-2px);
}

.install-button:active {
  background-color: #1e7e34;
  transform: translateY(0);
}

footer {
  background-color: #eee;
  color: #777;
  padding: 15px 0;
  font-size: 0.9em;
  border-top: 1px solid #ddd;
}