I'm trying to make a simple CSS drop down menu that when you mouse over a link, the sub menu appears. I've managed to achieve this when you mouse over an li but can't figure out how to do it using a link.

The reason why I'm trying to do this using a link rather than the li is that my menu width is 100% and the li spans a greater area than the link so if you mouse over that area, the sub menu appears when you don't want it to.

My CSS is as follows:

.menu {
    border: solid 1px red;
    font-size: 5em;
    font-family: 'Raleway', arial, serif;
}

.menu ul {
}

.menu ul.children {
    display: none;
}

.menu ul li {
    margin: 20px 0 10px 0;
}

.menu ul li:hover ul.children {
    display: block;
    position: absolute;
}

.menu ul li a {
    padding: 10px 10px 0 40px;
    background: rgba(0,0,0,0.5);
    color: #fff;
    text-decoration: none;
}