body.background {
  background: url('images/bg.png') no-repeat center center fixed;
  background-size: cover;
  font-family: Arial, sans-serif;
  color: white;
  margin: 0;
  padding: 0;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
}
.logo {
  height: 80px;
}
.center-banner img {
  height: 100px;
}
.btn {
  display: inline-block;
  margin: 10px;
  padding: 12px 20px;
  border: 2px solid red;
  border-radius: 25px;
  background-color: #0c0c4e;
  color: white;
  text-decoration: none;
  text-align: center;
}
.tarif-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}
.titre-centre {
  text-align: center;
  margin-top: 20px;
  font-size: 32px;
  color: white;
}
.titre-bouton {
  position: absolute;
  top: 130px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #0c0c4e;
  color: white;
  padding: 10px 20px;
  border: 2px solid red;
  border-radius: 15px;
  font-size: 24px;
  text-align: center;
  z-index: 999;
}