.calendar {
  background-color: #ffffff;
  padding: 20px;
  border-radius: 12px;
  text-align: center;
}

.calendar-header {
  display: flex;
  justify-content: center;
  gap: 10px;
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 15px;
}

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, var(--cell-size));
  gap: var(--gap);
  justify-content: center;
  margin-bottom: 10px;
  color: #f5a623;
  font-weight: bold;
}

.calendar-weekdays span {
  width: var(--cell-size);
  height: var(--cell-size);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ตารางวันในเดือน */
.calendar-days {
  display: grid;
  grid-template-columns: repeat(7, var(--cell-size));
  gap: var(--gap);
  justify-content: center;
}

.calendar-days span {
  width: var(--cell-size);
  height: var(--cell-size);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.3s;
  cursor: pointer;
  background: transparent;
  color: #000;
}

.highlight-circle {
  background: #4aa5f0 !important;
  color: #000 !important;
  font-weight: bold;
  border-radius: 50% !important;
  box-shadow: 0 0 8px rgba(49, 133, 202, 0.6);
}