formaster.css

/* Miscellaneous */
label {
  line-height: 25px;
}

.line input[type="text"], .line select, .line textarea {
  width: 100%;
}

/* Templating */
.line {
  border-bottom: 1px dotted #ccc;
  padding: 10px 0;
}

.line:after, .line:before {
  content : "";
  display: table;
}

.line:after {
  clear: both;
}

.line .line {
  padding: 0;
}
.line:last-child, .line.last {
  border-bottom: none;
}

.master {
  float: left;
  margin-right: 10px;
}

.slave{
  float: none;
  width: auto;
  display: table-cell;
  width: 10000px;
  box-sizing: border-box;
}


/* Master on right */
.rightMaster .master {
  float: right;
  margin-right: 0;
  margin-left: 10px;
}

.rightMaster .slave {
  padding: 0 10px 0 0;
}
​
/* Media queries */
@media screen and (max-width: 480px) {
    .master {
      width: 100%;
    }
    .master .master, .slave .master {
      width: auto;
    }
}