my-calendar {
  display: block;
  width: 420px;
  margin: auto;
}

.calendar {
  border: 1px solid var(--secondary-color, #ccc);
  padding: 10px;
  background: var(--background-color, white);
  color: var(--text-color, black);
  border-radius: 8px;
}

.calendar .header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.calendar .header button {
  background: none;
  border: 1px solid var(--primary-color, #ccc);
  color: var(--primary-color, black);
  cursor: pointer;
  padding: 5px 12px;
  border-radius: 4px;
  font-size: 16px;
}

.calendar .header button:hover {
  background: var(--primary-color, #eee);
  color: var(--secondary-color, black);
}

.calendar .month-year {
  font-weight: bold;
  color: var(--primary-color, black);
}

.calendar .weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  color: var(--primary-color, #555);
  font-weight: bold;
  margin-bottom: 6px;
}

.calendar .days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.calendar .day {
  padding: 10px;
  text-align: center;
  cursor: pointer;
  border-radius: 4px;
  position: relative;
}

.calendar .day:hover {
  background: var(--primary-color, #eee);
  color: var(--secondary-color, black);
}

.calendar .selected {
  background: var(--primary-color, blue);
  color: var(--secondary-color, white);
}

.calendar .today {
  border: 1px solid var(--primary-color, blue);
}

.calendar .empty {
  visibility: hidden;
}

.calendar .has-availability::after {
  content: '';
  display: block;
  width: 5px;
  height: 5px;
  background: var(--accent-color, green);
  border-radius: 50%;
  margin: 2px auto 0;
}