html, body {
    height: 100%;
    font-size: 22px;
}

body {
  display : table;
  width: 97%;
  background-color: rgba(25, 118, 239);
  /* background-image: linear-gradient(rgba(25, 196, 239), rgba(25, 118, 239)); */
  margin-left: auto;
  margin-right: auto;
  padding: 10px;
  color: black;
  border-style: hidden;
  border-radius: 6px;
  font-family: "Roboto Slab", sans-serif;
  font-size: 18px;
}

#page {
    min-height: 100%;
    position: relative;
    background-color: lightskyblue; /* rgba(25, 118, 239) */
    border-radius: 16px;
}

#footer {
    background-color: lightskyblue;
}

#header
{
  margin:auto;
  /* height:100px; */
  background-color: rgba(12, 76, 172);
  padding-bottom: 5px;
  
  border-top-left-radius: 16px;
  border-top-right-radius: 16px;
  /* border-radius: 16px;*/
  margin-top: 0px;
  margin-bottom: 5px;
  text-shadow: 4px 4px 6px black;
/* width:950px;
background-color:#363636; */
}

#bloc-principal {
  padding-bottom: 100px;
  margin:auto;
  /* background-image: linear-gradient(rgba(25, 196, 239), rgba(25, 118, 239)); */
  rgba(25, 118, 239);
  text-align: left;
  line-height : 2;
  border-bottom-left-radius: 16px;
  border-bottom-right-radius: 16px;
}

#bloc-texte {
  /* min-height: 100%; */
}

#footer {
  height: 100px;
  position: absolute;
  bottom: 0;
  background-color: rgba(25, 118, 239);
  /* opacity: 0; */
  /* margin:auto;
  text-align: center; */
}


h1 {
  color: white;
  font-weight: bold;
  text-align: center;
}

.vertical-center {
  min-height: 60%;  /* Fallback for browsers do NOT support vh unit */
  min-height: 70vh; /* These two lines are counted as one :-)       */

  display: flex;
  align-items: center;
}

/* Portrait phones and smaller */
@media only screen and (max-width: 480px) {
  html body {
    font-size: 16px;
   }
   h1{
     font-size: 26px;
   }
   img.img-phare {
    max-width : 50px;
    height : auto;
   }
}

@media (min-width: 481px) and (max-width: 999px) {
  html body {
    font-size: 16px;
   }
   h1{
     font-size: 26px;
   }
   img.img-phare {
    max-width : 80px;
    height : auto;
   }
}

@media (min-width: 1000px) and (max-width: 1399px) {
  html body {
    font-size: 18px;
   }
   h1{
     font-size: 28px;
   }
   img.img-phare {
    max-width : 100px;
    height : auto;
   }
}

@media (min-width: 1400px) and (max-width: 1799px) {
  html body {
    font-size: 20px;
   }
   h1{
     font-size: 34px;
   }
   img.img-phare {
    max-width : 150px;
    height : auto;
   }
}

@media (min-width: 1799px) {
  html body {
    font-size: 24px;
   }
   img.img-phare {
    max-width : 200px;
    height : auto;
   }
}