.center {
    margin-left: auto;
    margin-right: auto;
    margin-top: 3px;
    margin-bottom: 3px;
    text-align: center;
}

.center-form {
    display: table;
    width: 100%;
    margin-bottom: 20px;
}

.center-form form {
    display: table-cell;
}

.logo {
    margin:0 auto 30px auto;
    width:500px;
    display: flex;                  /* establish flex container */
    flex-direction: row;            /* default value; can be omitted */
    flex-wrap: nowrap;              /* default value; can be omitted */
    justify-content: space-between; /* switched from default (flex-start, see below) */
}

.logo-docaposte {
    float:right;
    width:100px;
}

.logo-docaposte img {
    height: 30px;
}

.logo-engie {
    float:left;
    width:100px;
}

.logo-engie img {
    height: 30px;
}

p {
    margin-top: 0px;
}

fieldset {
    padding: 10px;
    padding: 16px;
    border: 2px solid #91aabe;
    -moz-border-radius: 8px;
    -webkit-border-radius: 8px;
    border-radius: 8px;
    width: 420px;
    margin: 0px auto 20px auto;
    background-color: white;
}

.legend1 {
    margin-bottom: 0px;
    margin-left: 16px;
}

legend {
    padding: 0px 3px;
    font-weight: bold;
    font-variant: small-caps;
}

label {
    width: 400px;
    display: inline-block;
    vertical-align: top;
    margin: 6px;
    text-align: left;
}

em {
    font-weight: bold;
    font-style: normal;
    color: #f00;
}

input:focus {
    background: #eaeaea;
}

input,
textarea {
    width: 400px;
}

textarea {
    height: 100px;
}

select {
    width: 254px;
}

input[type=checkbox] {
    width: 10px;
}

input[type=submit] {
    width: 150px;
    padding: 10px;
}

.ok-message {
    background-color: darkgreen;
    color: white;
    padding: 10px 0 10px 0;
}

.ko-message {
    color: #b94a48;
    background-color: #f2dede;
    border-color: #eed3d7;
    padding: 10px 0 10px 0;
}

.title_form {
    background-color: #91aabe;
    color: white;
    padding: 10px;
}

#demande_fournisseur_submit {
    cursor: pointer;
    margin-bottom: 50px;
    background-color: #91aabe;
    color:white;
    width:450px;
    height:25px;
    font-weight: bold;
}

#demande_fournisseur_submit:hover {
    background-color: #708899;
}