.wpcf7-submit {
    background-color: #1a8a7a; 
    color: white; 
    padding: 10px 20px; 
    border: none; 
    border-radius: 5px; 
    font-weight: bold;
    text-transform: uppercase;
    position: relative; 
    overflow: hidden;
    transition: 0.5s ease;
}
.wpcf7-submit:hover{
    background-color: #bbbbbb;
}