.navbar-nav {
    flex-direction: row;
}

.navbar-nav .nav-link {
    color: #000000;
    padding: 10px 20px;
    font-weight: 500;
    position: relative;
}

.dropend .dropdown-toggle {
    color: salmon;
    margin-left: 1em;
}

.navbar-nav .dropdown-menu {
    position: absolute;

}

.dropdown-item:hover {
    background-color: lightsalmon;
    color: #fff;
}

.dropdown .dropdown-menu {
    display: block;
    -webkit-transition: all 0.3s ease-in-out;
    -moz-transition: all 0.3s ease-in-out;
    -ms-transition: all 0.3s ease-in-out;
    -o-transition: all 0.3s ease-in-out;
    transition: all 0.3s ease-in-out;
    -webkit-transition: all 0.3s ease-in-out;
    -moz-transition: all 0.3s ease-in-out;
    -ms-transition: all 0.3s ease-in-out;
    -o-transition: all 0.3s ease-in-out;
    transition: all 0.3s ease-in-out;
    top: 150%;
    opacity: 0;
    visibility: hidden;
}

.dropdown:hover>.dropdown-menu,
.dropend:hover>.dropdown-menu {
    display: block;
    margin-top: 0.125em;
    margin-left: 0.125em;
    top: 100%;
    opacity: 1;
    visibility: visible;
}
.main-nav > ul.navbar-nav > li > a{
    transition: all 0.4s;
}
.main-nav > ul.navbar-nav > li > a:hover{
    color: #3228d9;
}
.main-nav > ul.navbar-nav > li > a::before {
    content: " ";
    width: 17px;
    height: 2px;
    display: block;
    border-radius: 6px;
    background: #3987ee;
    position: absolute;
    top: 8px;
    left: 8px;
    opacity: 0;
    transition: opacity .25s ease-in-out;
    -moz-transition: opacity .25s ease-in-out;
    -webkit-transition: opacity .25s ease-in-out;
}
.main-nav > ul.navbar-nav > li:hover > a::before {
  opacity: 1;
}



@media screen and (min-width: 769px) {
    .dropend:hover>.dropdown-menu {
        position: absolute;
        top: 0;
        left: 100%;
    }

    .dropend .dropdown-toggle {
        margin-left: 0.5em;
    }
}