nav ul li {
    width: 25%;
    border-bottom: 1px solid #bababa;
}

@media screen and (max-width: 500px) {
    .hide-mobile {
        display: none;
    }
}

@media screen and (max-width: 500px) {
    div.mobile-collapse {
        width: auto;
        float: none;
        margin-right: 0;
    }
}

img {
    max-width: 100%;
    height: auto;
}

div.inner {
    width: 700px;
    margin: auto;
}

.img_container {
    text-align: center;
}

img {
    display: block;
    margin: 0 auto;
}

#nav ul li:hover ul li a:hover {
    background-color: #ebebeb;
}

#nav ul li {
    float: left;
    list-style: none;
}
#nav ul li ul li {
    float: none;
}

none

float

#nav ul ul {
    position: absolute;
    left: -1000em;
}
#nav ul li:hover ul {
    left: auto;
}