#grid {
    margin: 0;
}

#portfolio-usphone, #portfolio-h2oil, #portfolio-nmaps {
    display: block;
    position: relative;
    float: left;
    width: 722px;
    height: 360px;
    background: transparent url("../images/portfolio-usphone.png") top left no-repeat;
    margin-top: 48px;
}

#portfolio-usphone {
    margin-top: 24px;
}

#portfolio-h2oil {
    background: transparent url("../images/portfolio-h2oil.png") top left no-repeat;
}

#portfolio-nmaps {
    background: transparent url("../images/portfolio-notificationmaps.png") top left no-repeat;
}

a.visitSite {
    display: block;
    position: absolute;
    bottom: 29px;
    right: 43px;
    width: 112px;
    height: 19px;
    text-indent: -9999px;
    background: transparent url("../images/portfolio-btn-visit.gif") top left no-repeat;
    outline: none;
}

a.visitSite:hover {
    background-position: 0 100%;
}