/* Year/Month Picker - wrapper */
.fc-yearmonth-picker {
  display: inline-block;
  margin-left: 10px;
  vertical-align: middle;
  position: relative;
}

/* Year/Month Picker - input (txBw210に依存せず自己完結) */
.fc-yearmonth-picker .fc-ym-input {
  width: 100px;
  display: inline-block;
  vertical-align: middle;
  color: #4B4B4B;
  background-color: #FFFFFF;
  border: 1px solid #4B4B4B;
  border-radius: 0.25em;
  padding: 0.4em 0.65em;
  font-size: 1em;
  line-height: 1.5;
}

/* Popup */
.fc-yearmonth-popup {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1000;
  background: #FFFFFF;
  border: 1px solid #CCCCCC;
  border-radius: 0.4em;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  padding: 10px;
  margin-top: 4px;
  width: 260px;
}

/* Popup header - year navigation */
.fc-ym-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  padding: 4px 0;
}

.fc-ym-nav-btn {
  background: none;
  border: 1px solid #CCCCCC;
  border-radius: 0.25em;
  cursor: pointer;
  font-size: 1em;
  padding: 2px 10px;
  color: #4B4B4B;
}

.fc-ym-nav-btn:hover {
  background-color: #F0F0F0;
}

.fc-ym-year-label {
  font-size: 1.1em;
  font-weight: bold;
  color: #4B4B4B;
  cursor: pointer;
  padding: 4px 8px;
  border: 1px solid #CCCCCC;
  border-radius: 0.25em;
  background-color: #FFFFFF;
}

.fc-ym-year-label:hover {
  background-color: #F0F0F0;
  border-color: #999999;
}

.fc-ym-year-label::after {
  content: ' \25BC';
  font-size: 0.7em;
  vertical-align: middle;
}

/* Year list (toggle with month grid) */
.fc-ym-year-list {
  max-height: 200px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.fc-ym-year-btn {
  background: #FFFFFF;
  border: 1px solid #DDDDDD;
  border-radius: 0.25em;
  cursor: pointer;
  padding: 8px 4px;
  font-size: 0.9em;
  color: #4B4B4B;
  text-align: center;
}

.fc-ym-year-btn:hover {
  background-color: #E9F3FA;
  border-color: #2A88CB;
}

.fc-ym-year-btn.fc-ym-selected {
  background-color: #2A88CB;
  color: #FFFFFF;
  border-color: #2A88CB;
}

/* Popup body - month grid 4x3 */
.fc-ym-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

.fc-ym-month-btn {
  background: #FFFFFF;
  border: 1px solid #DDDDDD;
  border-radius: 0.25em;
  cursor: pointer;
  padding: 8px 4px;
  font-size: 0.9em;
  color: #4B4B4B;
  text-align: center;
}

.fc-ym-month-btn:hover {
  background-color: #E9F3FA;
  border-color: #2A88CB;
}

.fc-ym-month-btn.fc-ym-selected {
  background-color: #2A88CB;
  color: #FFFFFF;
  border-color: #2A88CB;
}