.width100pc {
    width: calc(100% - 2.4vh);
}

form > div.ligne-tab {
    text-align: right;
}

form > div.ligne-tab > div {
    margin: 1vh;
}

input[type="submit"] {
    border: 0;
    padding: 1vh 3vh;
}

textarea {
    width: calc(100% - 1vh);
}