@charset "utf-8";
ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,body,html,p,blockquote,fieldset,input{margin:0; padding:0;}
body {
  margin: 0px;
  color: #333;
  font-family: "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", "メイリオ", Meiryo, "MS UI Gothic", sans-serif;
}

/*--- header_menu ---*/
#header_menu {
<?/*  width: 800px; */?>
}
#header_menu ul {
  list-style:none;
  text-align:center;
  border-top:1px solid #a4a3ee;
  border-bottom:1px solid #a4a3ee;
  padding:2px 0;
  background-color:#eef1f5;
}
#header_menu ul li {
  display:inline;
  text-transform:uppercase;
  padding:0 10px;
  letter-spacing:1em;
}
#header_menu ul li a {
  text-decoration:none;
  color:<?/*lightsteelblue;*/?>#a4a3ee;
}
#header_menu ul li a:hover {
  text-decoration:underline;
<?/*  background-image:url(../img/hover.png);*/?>
<?/*  background-repeat:repeat-x;*/?>
  background-color:lavender;
  color:cornflowerblue;
}

/*--- footer ---*/
#footer {
  text-align: right;
  margin-top: 1em;
  border-top: 1px solid gray;
<?/*  width: 800px; */?>
}

iframe {
  border: none;
}

div.center {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 480px;
  height: 200px;
  margin: -100px 0 0 -250px;
  padding: 10px;
  display: table-cell;
  text-align: center;
  vertical-align: middle;
}