.calendar {
    width: 350px;
    margin: 50px auto 0;
    background: #777;
    color: #e1e1e1;
  }
  
  .calendar__month {
    font-size: 20px;
    font-weight: 800;
    padding: 10px 0;
    width: 100%;
    position: relative;
  }
  
  .cal-month__previous,
  .cal-month__next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    width: 30px;
    height: 30px;
    text-align: center;
  }
  .cal-month__previous:hover,
  .cal-month__next:hover {
    background-color: #42a5f5;
    box-shadow: 0 5px 5px -5px rgba(0, 0, 0, 0.75);
    border-radius: 50%;
    font-weight: 800;
    color: #111;
  }
  
  .cal-month__next {
    right: 0;
  }
  
  .cal-month__current {
    text-align: center;
    color: #e1e1e1;
  }
  
  .cal-head__day,
  .cal-body__day {
    display: inline-block;
    width: 50px;
    height: 50px;
    float: left;
  }
  
  .cal-body__week,
  .calendar__head {
    display: block;
    height: 50px;
    width: 350px;
  }
  
  .calendar__head {
    line-height: 50px;
    position: relative;
  }
  .calendar__head:after {
    content: " ";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background-color: #90caf9;
  }
  
  .cal-body__day {
    color: #777;
    line-height: 50px;
    text-align: center;
    cursor: pointer;
  }
  
  .cal-day__month--current {
    color: #e1e1e1;
  }
  
  .cal-day__day--today {
    font-weight: 800;
    color: #2196f3;
  }
  
  .cal-day__day--selected {
    background-color: #2196f3;
    box-shadow: 0 5px 10px -5px rgba(0, 0, 0, 0.75);
    border-radius: 50%;
    color: #111;
  }