html {
	background: white;
}
body {
    background: White;
    display: flex;
    flex-flow: row wrap;
    max-width: 1280px;
    margin: 0 auto;
    font-family: Verdana;
}
#nav_button {
	display: none;
}
header {
	background: lightblue;
	position: relative;
	z-index: 10;
    width: 100%;
}
h1 {
	color: black;
	font-size: 48px;
	text-transform: uppercase;
	text-align: center;
	font-family: Verdana;
	margin: 0;
	padding: 25px;
}
nav {
	width: 25%;
}
nav a {
	display: block;
	background: lightblue;
	color: black;
    font-weight: bold;
	text-decoration: none;
	padding: 5px 10px;
	margin: 5px 0;
}
nav a.active {
	color: black;
	font-weight: bold;
    font-style: italic;
}
nav a:hover {
	background: white;
	color: black;
}
main {
	background: white;
	min-height: 400px;
	width: 75%;
	box-sizing: border-box;
	padding: 10px 20px;
}
main img {
    display: block;
    border: 1px solid black;
    width: 50%;
    float: right;
    margin: 0 0 20px 20px;
}
footer {
	background: lightblue;
	color: black;
	text-align: center;
    font-weight: bold;
    width: 100%;
    padding: 50px;
}
footer p {
	margin: 0;
	padding: 5px;
    font-size: 20px;
}
@media screen and (max-width:900px){
    h1{
        font-size: 42px;
    }
    nav{
        width: 100%;
        text-align: center;
    }
    nav a{
        display: inline-block;
    }
    main{
        width: 100%;
    }
}
@media screen and (max-width:500px){
    h1{
        font-size: 28px;
        text-align: center;
    }
    nav{
        transition: margin-top 0.5s;
        position: relative;
        margin-top: -200px;
    }
    nav.open{
        margin-top: 0;
    }
    nav a{
        display: block;
        margin: 2px;
        font-size: 20px;
        padding: 10px;
    }
    main img{
        width: 100%;
    }
    #nav_button{
        display: block;
        position: absolute;
        bottom: -12px;
        left: 20px;
        box-sizing: border-box;
        padding: 5px 10px;
        border: 1px solid black;
        background: lightblue;
        color: black;
        font-weight: bold;
        text-align: center;
        
    }
    #nav_button:hover{
        background: lightblue;
        cursor: pointer;
        color: white;
    }
    main h3{
        text-align:  center;
    }
    
}