CSS
<style>
/* ===== CECH HRÁČŮ MENU ===== */

.navigation-in > ul > li > a{
    font-family: "Cinzel", Georgia, serif !important;
    font-size: 13px !important;
    font-weight: 700 !important;
    text-transform: uppercase;
    color:#d9c8a0 !important;
    padding:18px 14px !important;
    letter-spacing:.4px;
    position:relative;
    transition:.25s;
}

/* hover */
.navigation-in > ul > li > a:hover{
    color:#ffffff !important;
}

/* cechovní linka */
.navigation-in > ul > li > a:after{
    content:"";
    position:absolute;
    bottom:8px;
    left:50%;
    width:0;
    height:2px;
    background:#8d1719;
    transition:.25s;
    transform:translateX(-50%);
}

.navigation-in > ul > li:hover > a:after{
    width:70%;
}

/* erb při hoveru */
.navigation-in > ul > li > a:before{
    content:"";
    position:absolute;
    top:-8px;
    left:50%;
    transform:translateX(-50%);
    width:20px;
    height:20px;
    background-image:url("SEM_URL_LOGA");
    background-size:contain;
    background-repeat:no-repeat;
    opacity:0;
    transition:.25s;
}

.navigation-in > ul > li:hover > a:before{
    opacity:1;
}

/* dropdown */
.navigation-in ul.menu-level-2{
    background:#111 !important;
    border:1px solid #7b1113 !important;
    border-top:3px solid #8d1719 !important;
    box-shadow:0 15px 35px rgba(0,0,0,.6);
}

.navigation-in ul.menu-level-2 li a{
    font-family:"Cinzel", Georgia, serif !important;
    color:#e7dcc5 !important;
    font-size:13px !important;
    padding:12px 16px 12px 42px !important;
    position:relative;
}

/* malé erby v submenu */
.navigation-in ul.menu-level-2 li a:before{
    content:"";
    position:absolute;
    left:12px;
    top:50%;
    transform:translateY(-50%);
    width:18px;
    height:18px;
    background-image:url("SEM_URL_LOGA");
    background-size:contain;
    background-repeat:no-repeat;
}

.navigation-in ul.menu-level-2 li a:hover{
    background:rgba(141,23,25,.35) !important;
    color:#fff !important;
}

/* ===== TŘI TEČKY / ZABALENÉ MENU ===== */

.navigation-in .menu-helper > a,
.navigation-in li.menu-helper > a,
.navigation-in .menu-helper-visible > a{
    font-family:"Cinzel", Georgia, serif !important;
    font-size:13px !important;
    font-weight:700 !important;
    text-transform:uppercase;
    color:#d9c8a0 !important;
    padding:18px 14px !important;
    letter-spacing:.4px;
    position:relative;
    transition:.25s;
}

.navigation-in .menu-helper > a:hover,
.navigation-in li.menu-helper:hover > a,
.navigation-in .menu-helper-visible > a:hover{
    color:#ffffff !important;
}

.navigation-in .menu-helper > a:after,
.navigation-in li.menu-helper > a:after,
.navigation-in .menu-helper-visible > a:after{
    content:"";
    position:absolute;
    bottom:8px;
    left:50%;
    width:0;
    height:2px;
    background:#8d1719;
    transition:.25s;
    transform:translateX(-50%);
}

.navigation-in .menu-helper:hover > a:after,
.navigation-in li.menu-helper:hover > a:after,
.navigation-in .menu-helper-visible:hover > a:after{
    width:70%;
}

/* dropdown u tří teček */
.navigation-in .menu-helper ul,
.navigation-in li.menu-helper ul,
.menu-helper ul{
    background:#111 !important;
    border:1px solid #7b1113 !important;
    border-top:3px solid #8d1719 !important;
    box-shadow:0 15px 35px rgba(0,0,0,.6);
}

.navigation-in .menu-helper ul li a,
.navigation-in li.menu-helper ul li a,
.menu-helper ul li a{
    font-family:"Cinzel", Georgia, serif !important;
    color:#e7dcc5 !important;
    font-size:13px !important;
    padding:12px 16px 12px 42px !important;
    position:relative;
    background:transparent !important;
}

.navigation-in .menu-helper ul li a:before,
.navigation-in li.menu-helper ul li a:before,
.menu-helper ul li a:before{
    content:"";
    position:absolute;
    left:12px;
    top:50%;
    transform:translateY(-50%);
    width:18px;
    height:18px;
    background-image:url("SEM_URL_LOGA");
    background-size:contain;
    background-repeat:no-repeat;
}

</style>
<style>

.navigation-in .menu-helper ul li a:hover,
.navigation-in li.menu-helper ul li a:hover,
.menu-helper ul li a:hover{
    background:rgba(141,23,25,.35) !important;
    color:#fff !important;
}

/* ===== OBRÁZKY PRO JEDNOTLIVÉ ŽÁNRY V DROPDOWNU ===== */

<style>
.navigation-in ul.menu-level-2 li a[href*="fantasy"]:before,
.navigation-in ul.menu-level-2 li a[href*="Fantasy"]:before {
    background-image: url("https://www.cechhracu.cz/user/documents/upload/Nová složka/fantasy_drak_64x64.png") !important;
}

/* Hororové hry */
.navigation-in ul.menu-level-2 li a[href*="horor"]:before,
.navigation-in ul.menu-level-2 li a[href*="horror"]:before {
    background-image: url("https://www.cechhracu.cz/user/documents/upload/Nová složka/horor_lebka_64x64.png") !important;
}

/* Sci-fi hry */
.navigation-in ul.menu-level-2 li a[href*="sci-fi"]:before,
.navigation-in ul.menu-level-2 li a[href*="scifi"]:before {
    background-image: url("https://www.cechhracu.cz/user/documents/upload/Nová složka/scifi_raketa_64x64.png") !important;
}

/* Válečné a strategické hry */
.navigation-in ul.menu-level-2 li a[href*="valecne"]:before,
.navigation-in ul.menu-level-2 li a[href*="strategicke"]:before {
    background-image: url("https://www.cechhracu.cz/user/documents/upload/Nová složka/valecne_helma_64x64.png") !important;
}

/* Komixové deskové hry */
.navigation-in ul.menu-level-2 li a[href*="komiksove"]:before,
.navigation-in ul.menu-level-2 li a[href*="komiksove"]:before {
    background-image: url("https://www.cechhracu.cz/user/documents/upload/Nová složka/komiks_kniha_64x64.png") !important;
}

/* Ostatní hry */
.navigation-in ul.menu-level-2 li a[href*="ostatni"]:before {
    background-image: url("https://www.cechhracu.cz/user/documents/upload/Nová složka/ostatni_kostka_64x64.png") !important;
}

/* Úprava velikosti obrázků */
.navigation-in ul.menu-level-2 li a:before {
    width: 22px !important;
    height: 22px !important;
    background-size: cover !important;
    background-position: center !important;
    border-radius: 4px;
}
<style>
CSS