date_input.css

/* Some resets for compatibility with existing CSS */
.date_selector, .date_selector * {
  width: auto;
  height: auto;
  border: none;
  background: none;
  margin: 0;
  padding: 0;
  text-align: left;
  text-decoration: none;
}
.date_selector {
  background: #F2F2F2;
  border: 1px solid #bbb;
  padding: 5px;
  margin: -1px 0 0 0;
  position: absolute;
  z-index: 100000;
  display: none;
}
.date_selector_ieframe {
  position: absolute;
  z-index: 99999;
  display: none;
}
  .date_selector .nav {
    width: 17.5em; /* 7 * 2.5em */
  }
  .date_selector .month_nav, .date_selector .year_nav {
    margin: 0 0 3px 0;
    padding: 0;
    display: block;
    position: relative;
    text-align: center;
  }
  .date_selector .month_nav {
    float: left;
    width: 55%;
  }
  .date_selector .year_nav {
    float: right;
    width: 35%;
    margin-right: -8px; /* Compensates for cell borders */
  }
  .date_selector .month_name, .date_selector .year_name {
    font-weight: bold;
    line-height: 20px;
  }
  .date_selector .button {
    display: block;
    position: absolute;
    top: 0;
    width: 18px;
    height: 18px;
    line-height: 17px;
    font-weight: bold;
    color: #003C78;
    text-align: center;
    font-size: 120%;
    overflow: hidden;
    border: 1px solid #F2F2F2;
  }
    .date_selector .button:hover, .date_selector .button.hover {
      background: none;
      color: #003C78;
      cursor: pointer;
      border-color: #ccc;
    }
  .date_selector .prev {
    left: 0;
  }
  .date_selector .next {
    right: 0;
  }
  .date_selector table {
    border-spacing: 0;
    border-collapse: collapse;
    clear: both;
  }
    .date_selector th, .date_selector td {
      width: 2.5em;
      height: 2em;
      padding: 0;
      text-align: center;
      color: black;
    }
    .date_selector td {
      border: 1px solid #ccc;
      line-height: 2em;
      text-align: center;
      white-space: nowrap;
      color: #003C78;
      background: white;
    }
    .date_selector td.today {
      background: #FFFEB3;
    }
    .date_selector td.unselected_month {
      color: #ccc;
    }
    .date_selector td.selectable_day {
      cursor: pointer;
    }
    .date_selector td.selected {
      background: #D8DFE5;
      font-weight: bold;
    }
    .date_selector td.selectable_day:hover, .date_selector td.selectable_day.hover {
      background: #003C78;
      color: white;
    }