form input[type="text"],
form input[type="email"],
form select {
    width: 100%;
    padding: 0.8em;
    margin-bottom: 1em;
    border: 1px solid #ccc;
    border-radius: 5px;
}

form input[type="submit"],
form button {
    background-color: #2ecc71;
    color: white;
    padding: 0.7em 1.2em;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

form input[type="submit"]:hover,
form button:hover {
    background-color: #27ae60;
}

#options_avancees {
  padding-left: 15px;
  border-left: 2px solid #ccc;
}