*{
  box-sizing: border-box;
}

@font-face {
font-family: 'Lato';
src: url('Lato-Bold.ttf') format('truetype'),
}

body {
  margin: 0;
  font-family: 'Lato', sans-serif, Arial;
}

p {
  letter-spacing: 3px;
}

#header {
  background-color: white;
/*  padding: 30px 10px 10px; /* suppr le 2e? */
  color: red;
  text-align: center;
  font-size: 32px;
  font-weight: bold;
  position: fixed;
  top: 0;
  width: 100%;
  transition: 0.7s;
}

img {
  border-radius: 1%;
  pointer-events: none; /* désactive la copie du clic droit */
}

a:visited, a:link, a:active {
  text-decoration: none;
  color: grey;
}

a:hover {
  color: red;
}

div.barres {
  margin-top: 0px;
  float: left;
  position: sticky;
  top: 0px;
  font-size: 18px;
  color: grey
}

.row {
  display: flex;
  flex-wrap: wrap;
  padding: 0 4px;
  margin-top: 100px;
  margin-left: auto;
  margin-right: auto;
  width: 65%;
}

.column {
  flex: 100%;
  max-width: 100%;
  padding: 0 4px;
}

.column img {
  margin-top: 8px;
  vertical-align: middle;
}

.chevron{
  height: 40px;
  width: 40px;
  position:fixed;
  margin-right: 20px;
  margin-bottom: 20px;
  right:0;
  bottom:0;
  font-size: 32px;
  z-index: 99;
  pointer-events:none;
  opacity:0;
  justify-content: center;
  align-items: center;
  color:grey;
  transition:all 0.7s;
}

#chevron:hover {
  opacity : 1;
  transition: 1s;
  color: red;
  background-color: white;
  cursor: pointer;
}

/* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
@media screen and (max-width: 1000px) {
  .column {
    flex: 100%;
    max-width: 100%;
  }
  .barres {
    display: none;
  }
}

.footer {
 font-size: 30px;
 position: sticky;
 left: 0;
 bottom: 0;
 width: 100%;
 background-color: white;
 color: red;
 text-align: center;
 top: 100vh;
}