.center {
  margin-left: auto;
  margin-right: auto;
}
.txtleft {
  text-align: left;
}
.txtright {
  text-align: right;
}
.txtcenter {
  text-align: center;
}
.mt0,
.mtn {
  margin-top: 0;
}
.mt1,
.mts {
  margin-top: 10px;
}
.mt2,
.mtm {
  margin-top: 20px;
}
.mt3,
.mtl {
  margin-top: 30px;
}
.mr0,
.mrn {
  margin-right: 0;
}
.mr1,
.mrs {
  margin-right: 10px;
}
.mr2,
.mrm {
  margin-right: 20px;
}
.mr3,
.mrl {
  margin-right: 30px;
}
.mb0,
.mbn {
  margin-bottom: 0;
}
.mb1,
.mbs {
  margin-bottom: 10px;
}
.mb2,
.mbm {
  margin-bottom: 20px;
}
.mb3,
.mbl {
  margin-bottom: 30px;
}
.ml0,
.mln {
  margin-left: 0;
}
.ml1,
.mls {
  margin-left: 10px;
}
.ml2,
.mlm {
  margin-left: 20px;
}
.ml3,
.mll {
  margin-left: 30px;
}
/* blocks that needs to be placed under floats */
.clear,
.line,
.row {
  clear: both;
}
/* table layout */
.row {
  display: table;
  table-layout: fixed;
  width: 100%;
}
.row > *,
.col {
  display: table-cell;
  vertical-align: top;
}
.hidden {
  display: none;
}
.mod {
  overflow: hidden;
}