epicyon/epicyon-calendar.css

body {
  background-color: #e66053;
  color: #4E4F4A;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  font-family: 'Montserrat';
  font-weight: 700;
  min-height: 100vh;
}

main {
  background-color: #F6E9DC;
  -ms-flex-preferred-size: 980px;
      flex-basis: 980px;
}

.calendar {
  table-display: fixed;
  width: 100%;
}

.calendar__day__header,
.calendar__day__cell {
  border: 2px solid #e66053;
  text-align: center;
  width: 100% / 7;
  vertical-align: middle;
}
.calendar__day__header:first-child,
.calendar__day__cell:first-child {
  border-left: none;
}
.calendar__day__header:last-child,
.calendar__day__cell:last-child {
  border-right: none;
}

.calendar__day__header,
.calendar__day__cell {
  padding: .75rem 0 1.5rem;
}

.calendar__banner--month {
  text-align: center;
  padding: .75rem;
}
.calendar__banner--month h1 {
  background-color: #4E4F4A;
  color: #F6E9DC;
  display: inline-block;
  font-size: 3rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  padding: .5rem 2rem;
  text-transform: uppercase;
}

.calendar__day__header {
  font-size: 1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.calendar__day__cell {
  font-size: 4rem;
  position: relative;
}

tr:nth-child(odd) > .calendar__day__cell:nth-child(odd) {
  color: #e66053;
}

tr:nth-child(even) > .calendar__day__cell:nth-child(even) {
  color: #e66053;
}

.calendar__day__cell[data-event] {
  background-color: #e66053;
  color: #4E4F4A;
}
.calendar__day__cell[data-event]:after {
  content: attr(data-event);
  color: #F6E9DC;
  display: block;
  font-weight: 400;
  font-size: .75rem;
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 1rem;
  text-transform: uppercase;
}

.calendar__day__cell[data-today] {
  background-color: #4E4F4A;
  border-color: #4E4F4A;
  color: #F6E9DC;
}
.calendar__day__cell[data-today]:after {
  content: attr(data-today);
  color: #F6E9DC;
  display: block;
  font-size: .75rem;
  font-weight: 400;
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 1rem;
  text-transform: uppercase;
}