:root {
  --white: white;
  --black: black;
}

.div-block {
  background-image: url('../images/fond.jpg');
  background-position: 0 0;
  background-size: cover;
  width: 100%;
  height: 100%;
}

.body {
  background-image: url('../images/fond.jpg');
  background-position: 0 0;
  background-size: cover;
  background-attachment: fixed;
}

.connexion {
  background-color: #fff;
  border-radius: 10px;
  width: 400px;
  height: auto;
  padding: 20px;
  position: absolute;
  top: 50%;
  bottom: auto;
  left: 50%;
  right: 0%;
  transform: translate(-50%, -50%);
}

.div-block-2 {
  float: left;
  background-image: url('../images/logo.PNG');
  background-position: 0 0;
  background-repeat: no-repeat;
  background-size: auto 100%;
  width: 100%;
  height: 100px;
  margin-bottom: 40px;
  position: relative;
}

.div-block-3 {
  float: left;
  width: 100%;
  position: relative;
}