aiuto su centraggio

[cooly]

aiuto su centraggio

salve volevo sapere dato questo codice CSS

come posso mettere il menu in alto e al centro??

* {
  margin:0;
  padding:0;
  border:none;
}
html,body {
  font:700 .8em/1.3 helvetica, arial, "nimbus sans l", sans-serif;
  background:#edf8ff;
  height:100%;
}
a {
  text-decoration:none;
  color:#99aab2;
  text-shadow:0 1px 0 #fff;
}
nav {
  position:relative;
  top:-50px;
  display:-webkit-box;
  -webkit-box-pack:center;
  -webkit-box-align:center;
  display:-moz-box;
  -moz-box-pack:center;
  -moz-box-align:center;
  width:100%;
  height:100%;
}
ul {
  width:1000px;
  height:80px;
  display:-webkit-box;
  display:-moz-box;
  list-style:none;
  background:-webkit-gradient(
    linear,
    0 0, 0 100%,
    from(#fff), to(#f3faff)
  );
  background:-moz-linear-gradient(
   , #f3faff
  );
  -webkit-box-shadow:0 1px 2px #a6b7c1;
  box-shadow:0 1px 2px;
  border-radius:8px;
}
li {
  position:relative;
  -webkit-box-flex:1;
  -webkit-transition:padding-left .4s ease-out;
  -moz-box-flex:1;
  -moz-transition:padding-left .4s ease-out;
  margin:15px 0;
  padding-left:15px;
  border-right:1px solid rgba(160,180,190,.4);
}
li:last-child {
  border:none;
}
li:hover {
  padding-left:80px;
}
li:hover img {
  opacity:1;
  -webkit-transform:scale(1);
  -moz-transform:scale(1);
}
img {
  position:absolute;
  top:-5px;
  left:8px;
  opacity:0;
  -webkit-transform:scale(.5);
  -webkit-transition:all .4s ease-out;
  -moz-transform:scale(.5);
  -moz-transition:all .4s ease-out;
}
strong {
  display:block;
  font-size:1.3em;
  color:#111;
  padding-top:10px;
}

perchè messo cosi me lo trovo al centro della pagina . come lo metto in alto??

[cooly]

risolto:

html,body {
font:700 .8em/1.3 helvetica, arial, "nimbus sans l", sans-serif;
background:#edf8ff;
height:50%;