.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

body{
  /* background: url(../images/background.png); */
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}



@import url(https://fonts.googleapis.com/css?family=Source+Code+Pro|Oswald);

/****************************************/
/* Styling rules, such as font and colors */
.date-as-calendar {
  font-variant: normal;
  font-style: normal;
  font-weight: normal;
  font-family: "Helvetica", "Arial", sans-serif;

  /* It seems vertical-align: baseline does not work correctly with display: inline-flex. */
  vertical-align: top;

  /* margin: 1ex; */

  color: black;
  background: white;
  background : linear-gradient(to bottom right, #FFF 0%, #EEE 100%);

  border: 1px solid #888;
  border-radius: 3px;
  overflow: hidden;

  box-shadow: 2px 2px 2px -2px black;
}
.date-as-calendar .weekday,
.date-as-calendar .day,
.date-as-calendar .month,
.date-as-calendar .year {
  text-align: center;
  line-height: 1.0;
}
.date-as-calendar .month {
  font-family: "Oswald", sans-serif;
  text-transform: uppercase;
  background: #B11;
  background : linear-gradient(to bottom right, #D66 0%, #A00 100%);
  color: white;
}

/****************************************/
/* Layout rules using position: absolute and pixels. */
.position-pixels.date-as-calendar {
  display: inline-block;
  position: relative;
  width: 64px;
  height: 64px;
}
.position-pixels.date-as-calendar .weekday,
.position-pixels.date-as-calendar .day,
.position-pixels.date-as-calendar .month,
.position-pixels.date-as-calendar .year {
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  width: 100%;
  height: 1em;
}
.position-pixels.date-as-calendar .month {
  top: 0px;
  font-size: 12px;
  padding: 2px 0;
}
.position-pixels.date-as-calendar .weekday {
  top: 16px;
  font-size: 10px;
}
.position-pixels.date-as-calendar .day {
  top: 26px;
  font-size: 24px;
}
.position-pixels.date-as-calendar .year {
  top: 50px;
  font-size: 14px;
}

/****************************************/
/* Layout rules using position: absolute and relative dimensions using em. */
.position-em.date-as-calendar {
  display: inline-block;
  position: relative;

  width: 4em;
  height: 4em;
}
.position-em.date-as-calendar .weekday,
.position-em.date-as-calendar .day,
.position-em.date-as-calendar .month,
.position-em.date-as-calendar .year {
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  width: 100%;
  height: 1em;
}
.position-em.date-as-calendar .month {
  top: 0px;
  font-size: 0.75em;
  padding: 0.1em 0;
}
.position-em.date-as-calendar .weekday {
  top: 1.6em;
  font-size: 0.6125em;
}
.position-em.date-as-calendar .day {
  top: 1.1em;
  font-size: 1.5em
}
.position-em.date-as-calendar .year {
  bottom: 0px;
  font-size: 0.87750em;
}

/****************************************/
/* Layout rules using display: inline-flex and relative dimensions using em. */
.inline-flex.date-as-calendar {
  display: inline-flex;
  flex-direction: column;
  flex-wrap: nowrap;
  justify-content: space-between;

  width: 4em;
  height: 4em;
}
.inline-flex.date-as-calendar .weekday,
.inline-flex.date-as-calendar .day,
.inline-flex.date-as-calendar .month,
.inline-flex.date-as-calendar .year {
  display: block;
  flex: 1 1 auto;
}
.inline-flex.date-as-calendar .month {
  order: 1;
  font-size: 0.75em;
  padding: 0.1em 0;
}
.inline-flex.date-as-calendar .weekday {
  order: 2;
  font-size: 0.6125em;
}
.inline-flex.date-as-calendar .day {
  order: 3;
  font-size: 1.5em;
}
.inline-flex.date-as-calendar .year {
  order: 4;
  font-size: 0.87750em;
}

/****************************************/
/* Multiple sizes. */
.date-as-calendar.size0_5x {
  font-size: 8px;
}
.date-as-calendar.size0_75x {
  font-size: 12px;
}
.date-as-calendar.size1x {
  font-size: 16px;
}
.date-as-calendar.size1_25x {
  font-size: 20px;
}
.date-as-calendar.size1_5x {
  font-size: 24px;
}
.date-as-calendar.size1_75x {
  font-size: 28px;
}
.date-as-calendar.size2x {
  font-size: 32px;
}
.date-as-calendar.size3x {
  font-size: 48px;
}