#tcv-validator-form {
    max-width: 400px;
    margin: 20px auto;
    text-align: left;
}
#tcv-validator-form input {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
}
#tcv-validator-form button {
    background: #0073aa;
    color: #fff;
    border: none;
    padding: 10px 16px;
    cursor: pointer;
}
#tcv-validator-form button:hover {
    background: #005f8d;
}
.tcv-certificate {
    margin-top: 20px;
    padding: 15px;
    border: 1px solid #ddd;
    background: #f9f9f9;
}