* {
    margin:0;
    padding:0;
    box-sizing: border-box;
    
}

#main-nav a {
    color:#000;
    background: teal;
    display:block;
    height: 64px;
    font-family: lato;
    font-weight: bold;
    display:flex;
    align-items:center;
    justify-content: center;
    text-decoration: none;
    transition: background 0.4s;
}

#main-nav a:hover {
    background:pink;
}

#main-nav ul {
    list-style: none;
    display: flex;

}

#main-nav li {
    width:100%;
    text-align: center;
    position: relative;
}

#main-nav li:hover .submenu > li {
    display: block;
    top: 0px;
}

.submenu li {
  display: none;
  position: absolute;
  top:0px;
}


.submenu {
    display: flex;
    flex-direction: column;
    position: absolute;
    width:100%;

}

.submenu li {
    position: relative;

}

.submenu li:hover .submenu-2 li {
    display:block;
}

.submenu-2 li {
    display:none;
}

.submenu-2 {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 0px;
    left:100%;
    width: 120px;
}

.arrow {
    margin-left: 8px;
    color:000e;
    font-size: 12px;
}