Navigation bar with media queries

nav.css.scss

@mixin cool_gradient($from, $to) {
  background: $from; /* Old browsers */
  background: -moz-linear-gradient(top,  $from 0%, $to 100%); /* FF3.6+ */
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,$from), color-stop(100%,$to)); /* Chrome,Safari4+ */
  background: -webkit-linear-gradient(top,  $from 0%,$to 100%); /* Chrome10+,Safari5.1+ */
  background: -o-linear-gradient(top,  $from 0%,$to 100%); /* Opera 11.10+ */
  background: -ms-linear-gradient(top,  $from 0%,$to 100%); /* IE10+ */
  background: linear-gradient(to bottom,  $from 0%,$to 100%); /* W3C */
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='$from', endColorstr='$to',GradientType=0 ); /* IE6-9 */

}

#navigation {
  @include cool_gradient(#feffff, #d2ebf9);
  text-align: right;
  padding-top: 6px;
  padding-right: 20px;
  height: 60px;
  line-height: 54px;
  border-bottom: 2px solid #6699cc;

  @media (min-width: 321px) {
    #nav-button {
      display: none;
    }

    ul {
        list-style-type: none;
        margin: 0px;
        padding: 0px;

      li {
        display: inline;
        margin-right: 10px;
      }
    }

    h1 {
      color: #333;
      float: left;
      padding: 0px;
      margin:0 0 0 20px;
      text-shadow: 1px 1px #6699CC;
    }
  }

  @media (max-width: 320px) {
    h1 {
      float: left;
      display: none;
    }

    #nav-button {
      text-align: center;
      width: 43px;
      height: 43px;
      background: #000;
      cursor: pointer;
      display: inline-block;
    }

    ul {
        display: none;
        position: relative;
        top: -10px;
        list-style-type: none;
        margin: 0px;
        padding: 0px;
        width: 200px;
        margin-left: auto;
        margin-right: 0px;
        @include cool_gradient(#feffff, #d2ebf9);

      li {
        margin-right: 10px;
        text-align: left;
        padding-left: 20px;
        pointer: cursor;
      }
    }
  }
}