.back-to-top {
    position: fixed;
    display: none;
    left: 30px;
    bottom: 30px;
    z-index: 11;
    -webkit-animation: action 1s infinite alternate;
    animation: action 1s infinite alternate;
}
.btn-outline-primary:not(:disabled):not(.disabled).active, .btn-outline-primary:not(:disabled):not(.disabled):active, .show>.btn-outline-primary.dropdown-toggle {
    color: #fff;
    background-color: #1798dd;
    border-color: #1798dd;
}
.btn:not(:disabled):not(.disabled) {
    cursor: pointer;
    background-color: #1798dd;
    color: #fff;
}
.btn-outline-primary:hover {
    color: #fff;
    background-color: #1798dd;
    border-color: #1798dd;
}
.btn-outline-primary {
    color: #1798dd;
    border-color: #1798dd;
}
.btn {
 
    display: inline-block;
    font-weight: 400;
    color: #1798dd;
    text-align: center;
    vertical-align: middle;
    user-select: none;
    background-color: transparent;
    border: 2px solid transparent;
    padding: .375rem .75rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 0;
    transition: color .15s ease-in-out, background-color .15s ease-in-out, border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}