ul ul {
    display: none;
}

ul li:hover > ul {
        display: block;
}
ul#header_menu {
    list-style: none;
    position: relative;
    display: inline-table;
    border-bottom: 1px solid #ccc;
    width: 100%;
}
ul:after {
        content: ""; clear: both; display: block;
}
ul li {
    float: left;
    padding-right: 10px;
}
ul li:hover a {

    color: #1583BE;

    transition: color .16s linear;
}
ul li:hover {
    color: #1583BE;
    transition: color .16s linear;
}

ul li a {
    display: block;
    color: black;
    text-decoration: none;
    font-size: 1.3em;
}
ul ul {
    background: white;
    padding: 0;
    position: absolute;
    top: 100%;
    width: 100px;
    border: 1px solid #ccc;
}
ul ul li {
    border-bottom: 1px solid #ccc;
    float: none;
    position: relative;
    list-style-type: none;
}
ul ul li a {
    font-size: 1.2em;
}
ul ul li a:hover {
    color: #1583BE;
    transition: color .16s linear;
}

ul ul {
    display: none;
}

ul li:hover > ul {
        display: block;
}
ul#header_menu {
    list-style: none;
    position: relative;
    display: inline-table;
    border-bottom: 1px solid #ccc;
    width: 100%;
}
ul:after {
        content: ""; clear: both; display: block;
}
ul li {
    float: left;
    padding-right: 10px;
}
ul li:hover a {

    color: #1583BE;
    transition: color .16s linear;
}
ul li:hover {
    color: #1583BE;
    transition: color .16s linear;
}

ul li a {
    display: block;
    color: black;
    text-decoration: none;
    font-size: 1.3em;
}
ul ul {
    background: white;
    padding: 0;
    position: absolute;
    top: 100%;
    width: 100px;
    border: 1px solid #ccc;
}
ul ul li {
    border-bottom: 1px solid #ccc;
    float: none;
    position: relative;
    list-style-type: none;
}
ul ul li a {
    font-size: 1.2em;
}
ul ul li a:hover {
    color: #1583BE;
    transition: color .16s linear;
}

ul li:hover a {

    color: #1583BE;
    transition: color .16s linear;
}

ul li a:hover {

    color: #1583BE;
    transition: color .16s linear;
}