Voici le css de mon formulaire flottant, Sert-en en l'adaptant selon tes besoins,
/*formulaire flottant*/
#floating-form {
background-image: url('
https://zupimages.net/up/20/36/7dt1.jpg');
background-repeat: repeat;
background-position: 50% 50%;
margin-bottom: 100px;
font-family: Georgia, Arial, sans-serif; left: 9px;
width: 150px !important;
}
#floating-form h3 {
color: #D9B689;
font-family: Georgia, Arial, sans-serif!important;
}
#floating-form p.register{
font-family: Georgia, Arial, sans-serif;
background-color: #D9B6890;
color: #1B5161;
font-size: 18px;
padding: 3px;
}
#floating-form p.subscribers {
color: #D9B689;
font-size: 18px;
font-family: Georgia, Arial, sans-serif;
}
#floating-form form button,
#floating-form form a,
#floating-form form a:visited {
font-family: Georgia, Arial, sans-serif;
background-color: #D9B6890;
margin-top: 3px;
text-transform: none;
font-size: 18px;
width:100%;
border:none;
color: #1B5161;
box-shadow: none;
}