I need to add an icon to the menu item that contains the nested list. I implemented it through the class active. But I do not know how to implement a check for nesting.
nav { background-color: #49265c; } nav ul { margin: 0; padding: 0 4%; text-align: center; display: -webkit-flex; display: -ms-flexbox; display: flex; -webkit-justify-content: space-between; -ms-flex-pack: justify; justify-content: space-between; } nav ul li { list-style-type: none; display: inline-block; padding: 22px 10px; } nav ul li a { text-transform: uppercase; color: white; font-family: Tahoma; font-size: 18px; font-weight: 400; line-height: 15px; position: relative; } nav ul li ul, nav ul li ul li { display: block; } nav ul li ul { position: absolute; background-color: transparent; opacity: 0.95; background-color: #49265c; padding: 8px 0 20px 0; margin: 22px 0 0 -30px; max-width: 265px; display: none; } nav ul li ul li { padding: 5px 30px; text-align: left; line-height: 1px; } nav ul li:hover ul { display: block; } nav ul li ul li a { font-size: 14px; font-weight: 400; text-transform: uppercase; border-top: none !important; } nav ul li a.active:after { display: block; position: absolute; content: ""; width: 8px; height: 8px; left: 0; right: 0; margin: auto; border: 2px solid #fff; border-top: none; border-right: none; -webkit-transform: rotate(-45deg); -ms-transform: rotate(-45deg); transform: rotate(-45deg); } nav ul li:hover a { border-top: 1px solid #fff; text-decoration: none; } nav ul li ul li:hover a, nav ul li:hover a { color: #fff; } nav ul li ul li:hover a { border-top: none; text-decoration: underline; } <nav> <div class="container"> <ul> <li><a href="">Π ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΈ</a> </li> <li><a href="" class="active">ΠΡΠΎΠ΄ΡΠΊΡΠΈΡ</a> <ul> <li><a href="">ΠΠΎΠΌΠΏΡΠ΅ΡΡΠΎΡΡ ALBERT</a> </li> <li><a href="">Π‘ΡΠ°ΡΠΈΠΎΠ½Π°ΡΠ½ΡΠ΅ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΎΡΡ SEC</a> </li> <li><a href="">Π‘ΡΠ°ΡΠΈΠΎΠ½Π°ΡΠ½ΡΠ΅ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΎΡΡ SMARTRONIC</a> </li> <li><a href="">ΠΠ΅ΡΠ΅Π΄Π²ΠΈΠΆΠ½ΡΠ΅ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΎΡΡ</a> </li> <li><a href="">ΠΠΎΠΊΠΎΠΌΠΎΡΠΈΠ²ΡΠ½Π΅ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΎΡΡ</a> </li> </ul> </li> <li><a href="">Π‘Π΅ΡΠ²ΠΈΡ</a> </li> <li><a href="">ΠΠΈΠ»Π΅ΡΡ</a> </li> <li><a href="">ΠΠΎΡΡΠ°Π²ΠΊΠ°</a> </li> <li><a href="">ΠΠΎΠ½ΡΠ°ΠΊΡ</a> <ul> <li><a href="">1</a> </li> <li><a href="">2</a> </li> <li><a href="">3</a> </li> <li><a href="">4</a> </li> <li><a href="">5</a> </li> </ul> </li> </ul> </div> </nav>