.icon{width:32px;height:32px;background-size:contain;background-repeat:no-repeat;background-position:center;display:inline-block;border-radius:50%;vertical-align:middle;margin-right:2px}
.icon-word {background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Crect width='32' height='32' rx='4' fill='%232B579A'/%3E%3Ctext x='16' y='22' font-family='Arial,sans-serif' font-weight='bold' font-size='18' fill='white' text-anchor='middle'%3EW%3C/text%3E%3C/svg%3E");}
.icon-excel{background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Crect width='32' height='32' rx='4' fill='%23217346'/%3E%3Ctext x='16' y='22' font-family='Arial,sans-serif' font-weight='bold' font-size='18' fill='white' text-anchor='middle'%3EX%3C/text%3E%3C/svg%3E");}
.icon-smath{background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Crect width='32' height='32' rx='4' fill='%232D2D2D'/%3E%3Ctext x='16' y='22' font-family='Arial,sans-serif' font-weight='bold' font-size='16' fill='%234FC3F7' text-anchor='middle'%3ES%3C/text%3E%3C/svg%3E");}
.icon-maxima{background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Crect width='32' height='32' rx='4' fill='%231A237E'/%3E%3Ctext x='16' y='22' font-family='Arial,sans-serif' font-weight='bold' font-size='16' fill='%23FFC107' text-anchor='middle'%3EM%3C/text%3E%3C/svg%3E");}
.icon-scilab{background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Crect width='32' height='32' rx='4' fill='%230072C6'/%3E%3Ctext x='16' y='22' font-family='Arial,sans-serif' font-weight='bold' font-size='16' fill='white' text-anchor='middle'%3ESc%3C/text%3E%3C/svg%3E");}