menu style : demo 63

CSS

(Add Bootsnav css file & Fonts required: Roboto Slab)
                        
                        :root{
                            --bg_color: #dfe6e9;
                            --text_color: #333;
                            --text_color2: #d63031;
                        }
                        nav.navbar.bootsnav{
                            font-family: 'Roboto Slab', serif;
                            margin-bottom: 150px;
                            border: none;
                        }
                        nav.navbar.bootsnav ul.nav>li{ margin-right: 20px; }
                        nav.navbar.bootsnav ul.nav > li > a{
                            color: var(--text_color);
                            background-color: #fff;
                            font-size: 16px;
                            font-weight: 600;
                            text-transform: uppercase;
                            padding: 5px;
                            border-radius: 10px;
                            position: relative;
                            z-index: 1;
                            transition: all .5s ease;
                        }
                        nav.navbar.bootsnav ul.nav > li.dropdown > a{ padding: 5px 18px 5px 5px; }
                        nav.navbar.bootsnav ul.nav > li.active > a,
                        nav.navbar.bootsnav ul.nav > li.active > a:hover,
                        nav.navbar.bootsnav ul.nav > li > a:hover,
                        nav.navbar.bootsnav ul.nav > li.on > a{
                            color: var(--text_color2);
                            background: transparent !important;
                            border: none;
                        }
                        nav.navbar.bootsnav ul.nav > li > a>span:before,
                        nav.navbar.bootsnav ul.nav > li > a>span:after{
                            content: '';
                            background: var(--text_color2);
                            height: 3px;
                            width: 100%;
                            opacity: 0;
                            transform: translateX(-50%) scaleX(0);
                            position: absolute;
                            left: 50%;
                            bottom: 0;
                            z-index: -1;
                            transition: all 0.2s ease;
                        }
                        nav.navbar.bootsnav ul.nav > li > a>span:after{
                            background-color: #fff;
                            height: 10px;
                            width: 10px;
                            border: 3px solid var(--text_color2);
                            border-top: none;
                            border-left: none;
                            opacity: 0;
                            transform: translateX(-50%) scaleX(1) rotate(45deg);
                            bottom: 0;
                        }
                        nav.navbar.bootsnav ul.nav>li.active>a>span:before,
                        nav.navbar.bootsnav ul.nav>li>a:hover>span:before,
                        nav.navbar.bootsnav ul.nav>li.on>a>span:before{
                            opacity: 1;
                            transform: translateX(-50%) scaleX(1);
                        }
                        nav.navbar.bootsnav ul.nav>li.active>a>span:after,
                        nav.navbar.bootsnav ul.nav>li>a:hover>span:after,
                        nav.navbar.bootsnav ul.nav>li.on>a>span:after{
                            opacity: 1;
                            bottom: -2px;
                        }
                        nav.navbar.bootsnav li.dropdown ul.dropdown-menu.megamenu-content li a:hover,
                        nav.navbar.bootsnav li.dropdown ul.dropdown-menu li a:hover,
                        nav.navbar.bootsnav li.dropdown ul.dropdown-menu li a.dropdown-toggle:active,
                        nav.navbar ul.nav li.dropdown.on ul.dropdown-menu li.dropdown.on > a{
                            color: var(--text_color2) !important;
                            background-color: #fff !important;
                        }
                        nav.navbar.bootsnav ul.nav > li.dropdown > a.dropdown-toggle:after{
                            color: #000;
                            position: absolute;
                            top: 5px;
                            right: 5px;
                            margin: 0 0 0 7px;
                        }
                        nav.navbar.bootsnav ul.nav > li.dropdown > ul{
                            opacity: 0;
                            visibility: hidden;
                            transform: perspective(600px) scaleY(0);
                            transform-origin: top center;
                            transition: all 0.5s ease-in-out 0s;
                        }
                        nav.navbar.bootsnav ul.nav > li.dropdown.on > ul{
                            opacity: 1 !important;
                            visibility: visible !important;
                            transform: perspective(600px) scale(1);
                        }
                        .dropdown-menu.multi-dropdown{
                            position: absolute;
                            left: -100% !important;
                        }
                        nav.navbar.bootsnav li.dropdown ul.dropdown-menu{
                            background-color: rgba(214,48,49,0.9);
                            border: none;
                            border-radius: 0;
                            top: 124%;
                        }
                        nav.navbar.bootsnav li.dropdown ul.dropdown-menu > li > a{ color: #fff; }
                        nav.navbar.bootsnav li.dropdown ul.dropdown-menu.megamenu-content{ top: 100%; }
                        nav.navbar.bootsnav li.dropdown ul.dropdown-menu.megamenu-content li{ font-size: 14px; }
                        nav.navbar.bootsnav li.dropdown ul.dropdown-menu.megamenu-content .menu-col li a{
                            color: #fff;
                            padding-left: 10px;
                        }
                        nav.navbar.bootsnav li.dropdown ul.dropdown-menu.megamenu-content .title{
                            color: #fff;
                            font-size: 16px;
                            font-weight: bold;
                        }
                        @media only screen and (max-width:990px){
                            .dropdown-menu.multi-dropdown{ left: 0 !important; }
                            nav.navbar.bootsnav .navbar-toggle{
                                color: var(--text_color2);
                                background: transparent !important;
                            }
                            nav.navbar.bootsnav ul.nav>li{ margin: 5px auto 15px; }
                            nav.navbar.bootsnav.navbar-mobile ul.nav>li>a{
                                background-color: transparent;
                                text-align: center;
                                padding: 10px 15px;
                                border: none;
                            }
                            nav.navbar.bootsnav ul.nav>li.dropdown>a{ padding: 10px 10px 10px 17px; }
                            nav.navbar.bootsnav ul.nav>li.dropdown>a.dropdown-toggle:before{ color: var(--text_color); }
                            nav.navbar.bootsnav ul.nav li.dropdown ul.dropdown-menu>li>a{
                                color: var(--text_color);
                                padding-left: 10px;
                                border-bottom-color: none;
                            }
                            nav.navbar.bootsnav .dropdown-menu{ z-index: 0; }
                            nav.navbar.bootsnav li.dropdown ul.dropdown-menu.megamenu-content .title{
                                font-size: 14px;
                                font-weight: normal;
                                color: var(--text_color);
                            }
                            nav.navbar.bootsnav li.dropdown ul.dropdown-menu.megamenu-content .col-menu li a{
                               color: var(--text_color);
                           }
                        }
                    

JavaScript

(Menu depend on jQuery,Bootstrap and Bootsnav.)
                        
                        
                    
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