ASP.net Style affects all links

Hi

In my ASP.net project I have the following markup. It was intended to be used only for my horizontal menu
but affects every link on the website. Is there a way to get around this? Thanks

<style>
  ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

li {
    float: left;
}

a:link, a:visited {
    display: block;
    width: 120px;
    font-weight: bold;
    color:white;
    background: linear-gradient(to bottom, lightskyblue,navy);
    text-align: center;
    padding: 10px;
    text-decoration: none;
    text-transform: uppercase;
    font-family:'Arial Rounded MT'
}

a:hover, a:active {
    background: linear-gradient(to bottom, lightskyblue,black);
    text-align: center;
}
#grad1  {
                color:blue;
                background: linear-gradient(to bottom, lightskyblue,navy);
                padding: 20px
           }
#grad2  {
                color:blue;
                background: linear-gradient(to bottom, lightskyblue,navy);
           }
</style>