.gc-form {
    background: #f4f4f4;
    padding: 15px;
    border-radius: 10px;
    margin-top: 20px;
    max-width: 400px;
}
.gc-form textarea,
.gc-form input[type="file"],
.gc-form input[type="submit"] {
    width: 100%;
    margin-bottom: 10px;
}
.gc-success img {
    margin-top: 10px;
    border-radius: 8px;
}
.gc-error {
    color: red;
    font-weight: bold;
}