WordPress default CSS

                                          /* =WordPress Core 
-------------------------------------------------------------- */ 
.alignnone {
    margin: 5px 20px 20px 0;
}
.aligncenter, div.aligncenter {
    display: block;
    margin: 5px auto 5px auto;
}
.alignright {
    float: right;
    margin: 5px 0 20px 20px;
}
.alignleft {
    float: left;
    margin: 5px 20px 20px 0;
}
.aligncenter {
    display: block;
    margin: 5px auto 5px auto;
}
a img.alignright {
    float: right;
    margin: 5px 0 20px 20px;
}
a img.alignnone {
    margin: 5px 20px 20px 0;
}
a img.alignleft {
    float: left;
    margin: 5px 20px 20px 0;
}
a img.aligncenter {
    display: block;
    margin-left: auto;
    margin-right: auto 
}
.wp-caption {
    background: #fff;
    border: 1px solid #f0f0f0;
    max-width: 96%;
    /* Image does not overflow the content area */ 
    padding: 5px 3px 10px;
    text-align: center;
}
.wp-caption.alignnone {
    margin: 5px 20px 20px 0;
}
.wp-caption.alignleft {
    margin: 5px 20px 20px 0;
}
.wp-caption.alignright {
    margin: 5px 0 20px 20px;
}
.wp-caption img {
    border: 0 none;
    height: auto;
    margin: 0;
    max-width: 98.5%;
    padding: 0;
    width: auto;
}
.wp-caption p.wp-caption-text {
    font-size: 11px;
    line-height: 17px;
    margin: 0;
    padding: 0 4px 5px;
}