.search-form {
    max-width: 600px;
    margin: 0 auto;
    margin-bottom: 20px;
}

.search-form input {
    width: 100% !important;
}

.search-form button {
    margin-bottom: 0;
}

@media (max-width: 764px) {
    .search-form {
        width: 100%;
        max-width: 100%;
    }
}