html body {
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  min-height: 100%;
  margin: 0;
  padding: 0;
  background-color: #878786;
  
  -webkit-background-size: cover; /* pour anciens Chrome et Safari */
  background-size: cover; /* version standardisée */
  scroll-behavior: smooth;
  font-family: 'Poppins', sans-serif;
}


html { 
  height: 100%;
  margin:0;
  padding:0;
}


section { 
  height: 100%;
  position: relative;
}


.main-logo { 
  padding-top: 100px;
  padding-bottom: 100px;
  text-align: center;
}

.big-logo { 
  width: 50%;
}

.big-logo img { 
  width: 80%;
}

h1 { 
  font-size: 36px;
  font-weight: 100;
  color: #fff;
}