argon-dashboard-react/src/assets/scss/argon-dashboard/custom/navbars/_navbar-collapse.scss

//
// Navabar collapse
//

// Collapse

.navbar-collapse-header {
    display: none;
}

@include media-breakpoint-down(sm) {
    .navbar-nav {
        .nav-link {
            padding: .625rem 0;
            color: theme-color("default") !important;
        }

        .dropdown-menu {
            box-shadow: none;
            min-width: auto;

            .media {
                svg {
                    width: 30px;
                }
            }
        }
    }

    .navbar-collapse {
        width: calc(100% - 1.4rem);
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1050;
        margin: .7rem;
        overflow-y: auto;
        height: auto !important;
        opacity: 0;

        .navbar-toggler {
            width: 20px;
            height: 20px;
            position: relative;
            cursor: pointer;
            display: inline-block;
            padding: 0;

            span {
                display: block;
                position: absolute;
                width: 100%;
                height: 2px;
                border-radius: 2px;
                opacity: 1;
                background: #283448;
            }

            :nth-child(1) {
                transform: rotate(135deg);
            }

            :nth-child(2) {
                transform: rotate(-135deg);
            }
        }

        .navbar-collapse-header {
            display: block;
            padding-bottom: 1rem;
            margin-bottom: 1rem;
            border-bottom: 1px solid rgba(0, 0, 0, .1);
        }

        .collapse-brand {
            img {
                height: 36px;
            }
        }

        .collapse-close {
            text-align: right;
        }
    }

    .navbar-collapse.collapsing,
    .navbar-collapse.show {
        padding: 1.5rem;
        border-radius: $border-radius;
        background: #FFF;
        box-shadow: 0 50px 100px rgba(50,50,93,.1),0 15px 35px rgba(50,50,93,.15),0 5px 15px rgba(0,0,0,.1);
        animation: show-navbar-collapse .2s ease forwards;
    }

    .navbar-collapse.collapsing-out {
        animation: hide-navbar-collapse .2s ease forwards;
    }
}

@keyframes show-navbar-collapse {
    0% {
        opacity: 0;
        transform: scale(.95);
        transform-origin: 100% 0;
    }

    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes hide-navbar-collapse {
    from {
        opacity: 1;
        transform: scale(1);
        transform-origin: 100% 0;
    }

    to {
        opacity: 0;
        transform: scale(.95);
    }
}