body {
  color: #333;
}
header {
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.5)),
    url(./bg.jpeg);
  background-position: center center;
  background-size: cover;
  min-height: 80vh;
}
.features .titre {
  font-weight: 100 !important;
}