.main { font-size: 12px; line-height: 18px }
.big { font-size: 16px; line-height: 20px }
.middle   { font-size: 14px; line-height: 20px }
.title     { font-weight: bold; font-size: 23pt; line-height: 30pt }
.title2  { font-weight: bold; font-size: 20pt; line-height: 30pt }
.title3 { font-size: 18pt; line-height: 30pt }