.header {
    min-height: 100px;
    margin: 0 auto;
    position: relative;
    width: 99%;
    border-radius: 8px 8px 8px 8px;    
    background: url("../images/img_header.png")  no-repeat center top #DEDEDE;
    border-left: 1px solid #BBBBBB;
    border-radius: 8px 8px 8px 8px;
    border-top: 1px solid #BBBBBB;
    box-shadow: 0 0 2px #BEBEBE inset;
    margin: 5px;
}

.alinear { 
    margin: 0 auto; 
    width: 960px; 
}

.footer {
    font-size: 13px;
    background: url("../images/img_footer.png") no-repeat center top;
    text-align: center;
    border-radius: 8px 8px 8px 8px;
}

.nav {
    margin: 0 auto;
    position: relative;
    width: 98.9%;
}

.general{
    font-family: Arial;
    font-size: 12px;
}

.general-negrita{
    font-family: Arial;
    font-size: 14px;
    font-weight: bold;
}

.general-negrita-italica{
    font-family: Arial;
    font-size: 14px;
    font-style: italic;
    font-weight: bold;
}