body{
	font-family: Verdana, Geneva, Tahoma, sans-serif;
	display: flex;
    flex-direction: column;
	height: 100vh;
}

header{
	background-color: rgb(3, 138, 138);
	height: 60px;
	color: white;
	flex-shrink: 0;	
}

header h1{
	font-size: 150%;
	font-weight: bold;
}

nav{
	color: white;
	height: 30px;
	background-image: linear-gradient(lightslategrey, aquamarine);
}

nav li{
	display: inline-block;
    list-style: none;
	height: 30px;
}

nav a{
	display: flex;
	align-items: center;
	height: 100%;
    padding: 0 10px 0 10px;
    color: aquamarine;
}

#content{
	flex:auto;
	display: flex;
    flex-direction: row;
}

main{
	width: 60%;
    box-sizing: border-box;
	padding: 20px;
    background-color: lightblue;
}

aside{
	width: 30%;
    box-sizing: border-box;
	padding: 20px;
    background-color: teal;
}
aside li{
    color: whitesmoke;
    display: block;
    list-style: none;
	height: 30px;
}

footer{
	background-color: lightseagreen;
	color: white;
    padding: 20px;
    font-size: 85%;
    flex-shrink: 0;	
}

h1{
    color: whitesmoke;
	font-size: 140%;
	margin-bottom: 20px;
}

p{
	margin-bottom: 12px;
}

#menu-button{
    display: none;
}
input[type=button]{
    border:2px solid gray;
    background-color: #333333;
    border-radius: 4px;
    padding:10px;
    color:gray;
    font-weight: bold;
  }

  #image-gallery{
    width:380px;
  }

  #image-gallery #mainImg{
    width:100%;
    border: 2px solid #333333;
  }

@media all and (max-width : 800px) {
	header{
		height: 44px;
	}
    #content{
		display: block;
	}
	main, aside{
		width: 100%;
	}
    #menu-button{
        display: block;
        position: absolute;
        top: 0;
        right: 0;
        height: 44px;
        text-align: center;
        line-height: 44px;
        color: navy;
    }
    nav{
        height: auto;
        display: none;
    }
    nav li{
        display: block;

    }
    nav.open{
        display: block;
    }

}