* {
    margin: 0;
    padding: 0;
}

body {
    height: 100vh;

    display: flex;
    align-items: center;
    justify-content: center;

    font-family: Calibri, sans-serif;
    font-size: 1.4em;
}

.contenaire {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 1em 3em;
    border-radius: 3px;
}

.titre {
    margin-bottom: 2em;
}

form {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

input {
    margin-left: 1em;
    padding: .5em;
}

.line {
    display: flex;
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
}

.colonne {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

p, .line, .colonne {
    margin: 16px 0 16px 0;
}

p, label{
    text-align: center;
}

input[type=submit] {
    background: rgb(79,129,189);
    padding: 1em;
    border-radius: 10px;
    color: #fff;
    max-width: 14em;
    cursor: pointer;
}

input[type=submit], .contenaire {
    border: 4px solid rgb(56,93,138);
}

input[type=email] {
    width: 90%;
}

.bn_retour {
    margin-top: 1em;
    font-size: 2em;
}

.indication {
    font-size: .8em;
}

.up {
    position: relative;
    bottom: .5em;
    font-size: .8em;
}