header{
    position: absolute;
    width: 100%;
}
.upper-header div .logo{
    max-width: 250px;
    height: auto;
}
.upper-header div .mw-130{
    max-width: 130px;
}
@media (max-width: 768px) {
    .upper-header div .logo {
        max-width: 80px !important;
        height: auto;
    }
}


#myBtn {
    position: fixed;
    bottom: 23px;
    right: 12px;
    z-index: 99;
    font-size: 18px;
    border: none;
    outline: none;
    background-color: black;
    color: white;
    cursor: pointer;
    padding: 1px 7px 6px 7px;
    box-shadow: 1px 1px 7px 4px #ffffff69;
    border-radius: 4px;
  }