.tabella_hdr1 { width: 100%; table-layout: fixed; }
.riga_hdr1 { height: 25px; }
.cella_hdr1 { border: 1px solid #000000; padding-left: 3px; background-color: #C0C0C0; color: #FFFFFF; font-weight: bold; font-style: italic; vertical-align: bottom; line-height: 25px; }
.riga_hdr2 { height: 25px; }
.cella_hdr2 { border: 1px solid #000000; text-align: center; line-height: 25px; background-color: #C8C8C8; color: #FAFAFA; }