section {
    padding: 100px 0;
    text-align: center;
}
select.frecuency {
    border: none;
    font-style: italic;
    background-color: transparent;
    cursor: pointer;
    -webkit-transform: translateY(0);
    transform: translateY(0);
    -webkit-transition: -webkit-transform .35s ease-in;
    transition: -webkit-transform .35s ease-in;
    border-bottom: none;
}
select.frecuency:focus {
    outline: none;
    border-bottom: 5px solid #39b3d7;
    -webkit-transform: translateY(-5px);
    transform: translateY(-5px);
    -webkit-transition: -webkit-transform .35s ease-in;
    transition: -webkit-transform .35s ease-in;
}
.free {
    text-transform: uppercase;
}
.input-group {
    margin: 20px auto;
    width: 100%;
}
input.btn.btn-lg,
input.btn.btn-lg:focus {
    outline: none;
    width: 60%;
    height: 60px;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}
button.btn {
    width: 40%;
    height: 60px;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}
.promise {
    color: #999;
}