body {
    padding: 0;
    margin: 0;
}

.nav, .content {
    width: 100%;
    margin: 0 auto;
    background-repeat: no-repeat;
    background-position: center;
}

.nav {
    height: 187px;
    background-image: url(images/error_header.png);
}

.content {
    height: 750px;
    background-image: url(images/error_body.png);
    position: relative;
}

#btn {
    position: absolute;
    background-color: #e74e4d;
    color: #ede8dc;
    font-size: 18px;
    text-align: center;
    border: 0;
    display: block;
    border-radius: 5px;
    width: 130px;
    height: 54px;
    line-height: 54px;
    left: 50%;
    margin-left: -65px;
    bottom: 35px;
    text-decoration: none;
}