html, body{
margin: 0;
padding: 0;
width: 100%;
height: 100%;
box-sizing: border-box;
}

*, *:before, *:after {
  box-sizing: inherit;
}

body{
    font-family: 'Prata', serif;
}

a{
    color: inherit;
    text-decoration: none;
}

img{
    margin: 0;
    padding: 0;
}

body{
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
}

.contain{
    padding: 0 4%;
    margin: 0 auto;
    max-width: 1100px;
}

.header_title{
    display: block;
    padding: 50px 0;
    font-size: 40px;
}

.header_menu{
    display: none;
    /* display: inline-block; */
    margin-left: 20px;
}

.header_menu_item{
    padding: 10px 15px;
    display: inline-block;
}

.art{
    overflow:hidden;
}

.art_image{
    width: 100%;
    margin-bottom: 4%;
}

.copyright{
    text-align: center;
    opacity: 0.3;
    font-size: 14px;
    padding: 0 0 4%;
}

@media (max-width: 800px){
    .header{
        text-align: center;
    }
}