Reusable component library sources

                  
<div class="calendar">
  <div class="calendar__title">October 2021</div>
    <div class="calendar__wrapper">
      <div class="calendar__inner">
        <span class="calendar__item calendar__item_day">Mon</span>
        <span class="calendar__item calendar__item_day">Tue</span>
        <span class="calendar__item calendar__item_day">Wed</span>
        <span class="calendar__item calendar__item_day">Thu</span>
        <span class="calendar__item calendar__item_day">Fri</span>
        <span class="calendar__item calendar__item_day">Sat</span>
        <span class="calendar__item calendar__item_day">Sun</span>
        <span class="calendar__item"></span>
        <span class="calendar__item"></span>
        <span class="calendar__item"></span>
        <span class="calendar__item"></span>
        <span class="calendar__item">1</span>
        <span class="calendar__item">2</span>
        <span class="calendar__item">3</span>
        <span class="calendar__item">4</span>
        <span class="calendar__item">5</span>
        <span class="calendar__item">6</span>
        <span class="calendar__item">7</span>
        <span class="calendar__item">8</span>
        <span class="calendar__item">9</span>
        <span class="calendar__item">10</span>
        <span class="calendar__item">11</span>
        <span class="calendar__item">12</span>
        <span class="calendar__item">13</span>
        <span class="calendar__item">14</span>
        <span class="calendar__item">15</span>
        <span class="calendar__item">16</span>
        <span class="calendar__item">17</span>
        <span class="calendar__item calendar__item_active">18</span>
        <span class="calendar__item calendar__item_between-active">19</span>
        <span class="calendar__item calendar__item_between-active">20</span>
        <span class="calendar__item calendar__item_between-active">21</span>
        <span class="calendar__item calendar__item_between-active">22</span>
        <span class="calendar__item calendar__item_active">23</span>
        <span class="calendar__item">24</span>
        <span class="calendar__item">25</span>
        <span class="calendar__item">26</span>
        <span class="calendar__item">27</span>
        <span class="calendar__item">28</span>
        <span class="calendar__item">29</span>
        <span class="calendar__item">30</span>
        <span class="calendar__item">31</span>
      </div>
    </div>
  </div>
                  
                

                  
  .calendar {
    border: 1px solid var(--grey-3);
    border-radius: 8px;
    padding: 28px 36px;
    width: 100%;
    max-width: 300px;
  }
  
  .calendar__title {
    text-align: center;
    font-family: var(--ff-secondary);
    font-weight: 600;
    font-size: 20px;
    line-height: 24px;
    padding-bottom: 24px;
    color: var(--grey-5);
  }
  
  .calendar__item {
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: var(--ff-tertiary);
    font-weight: normal;
    font-size: 16px;
    line-height: 20px;
    color: var(--grey-5);
  }
  
  .calendar__item_day {
    align-items: start;
    font-family: var(--ff-secondary);
    font-weight: normal;
    font-size: 14px;
    line-height: 20px;
    color: var(--grey-3);
  }
  
  .calendar__item_active {
    color: var(--white);
    background: var(--primary);
  }
  
  .calendar__item_between-active {
    color: var(--grey-5);
    background-color: var(--calendar-item-between-active-bg);
  }
  
  .calendar__wrapper {
    padding-bottom: 100%;
    position: relative;
  }
  
  .calendar__inner {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    grid-template-rows: repeat(7, 1fr);
  }
  
  .calendar_default {
    max-width: 304px;
  }