.calendar-container {
  max-width: 100%;
  margin: 0rem auto;
  padding: 1.2rem;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  margin-top: 2rem;
}

.calendar__header {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  margin-bottom: 0.5rem;
}

.calendar__title {
  font-size: 1.2rem;
  font-weight: bold;
  color: #404170;
  margin: 0 2.5rem;
  text-align: center;
}

.calendar__prev,
.calendar__next {
  width: 20px;
  height: 20px;
  border: none;
  background-color: #404170;
  border-radius: 6px;
  cursor: pointer;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.calendar__prev {
  left: 0;
}

.calendar__next {
  right: 0;
}

.calendar__prev::after {
  content: "◀";
  color: #fff;
  font-size: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.calendar__next::after {
  content: "▶";
  color: #fff;
  font-size: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.calendar__table {
  width: 100%;
  border-collapse: collapse;
  text-align: center;
  font-size: 0.9rem;
  color: #404170;
}

.calendar__table th,
.calendar__table td {
  width: 14.28%;
  padding: 0.5rem;
  vertical-align: top;
  border: #f5f8ff 1px solid;
}

.calendar__day--past {
  color: #aaa;
}

.calendar__day--open {
  color: #717ffa; /* 青色 */
  font-weight: bold;
}

.calendar__day--closed {
  color: #ff7f81;
  font-weight: bold;
}

.calendar__day--future {
  color: #999;
  font-size: 0.8rem;
}