html, body {
	background-color: #D3D3D3;
	margin: 0;
	padding: 0;
	text-align: center;
}

#menu_up {
	width: 1500px;
	height: 80px;
	text-align: left;
	background-image: url(../images/menu_up.jpg);
	margin-left: auto;
	margin-right: auto;
	margin-top: 10px;
}

li {
	width:200px;
    text-align:center;
    float:left;
    margin-right:4px;
	list-style-type:none;
    font-size:35px;
}

.button {
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 10px 43px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: -28px 2px;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    cursor: pointer;
}

.btn1 {
    background-color: white;
    color: black;
    border: 2px solid #4CAF50;
}

.btn1:hover {
    background-color: #4CAF50;
    color: white;
}