body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f9f9f9;
  margin: 0;
  padding: 20px;
  color: #333;
}

#calendar {
  max-width: 1800px;
  margin: 0 auto;
}

.calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.calendar-header button {
  padding: 10px 14px;
  font-size: 1.8rem;
  background-color: #e0e0e0;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.fuka-button {
  background-color: #e53935;
  color: white;
  border: none;
  padding: 6px 12px;
  margin-right: 8px;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
}

.fuka-button:hover {
  background-color: #c62828;
}

.calendar-header button:hover {
  background-color: #d0d0d0;
}

.calendar-title {
  font-size: 2rem;
  font-weight: bold;
}

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

.calendar-cell {
  background-color: #fff;
  border: 1px solid #ddd;
  padding: 8px;
  border-radius: 6px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.calendar-day {
  font-weight: bold;
  margin-bottom: 6px;
  font-size: 1.4rem;
}

.calendar-content {
  font-size: 0.9rem;
  color: #555;
}

.calendar-entry {
  padding: 4px;
  margin-bottom: 4px;
  border-radius: 4px;
}

.entry-top {
  font-weight: bold;
  margin-bottom: 2px;
}

.entry-bottom {
  font-size: 1em;
  color: #555;
}


.calendar-entry strong {
  display: block;
  color: #222;
}

.calendar-entry span {
  font-size: 1rem;
  color: #666;
}

.no-schedule {
  color: #aaa;
  font-style: italic;
}

@media screen and (max-width: 600px) {
  .calendar-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .calendar-header {
    flex-direction: column;
    gap: 8px;
  }
}

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  margin-bottom: 8px;
  font-weight: bold;
  text-align: center;
}

.calendar-cell.holiday .calendar-day {
  color: red;
  font-weight: bold;
}

.weekday-label {
  padding: 6px 0;
  background-color: #f0f0f0;
  border-radius: 4px;
}

.weekday-label.sunday {
  color: red;
}

.weekday-label.saturday {
  color: blue;
}

.calendar-cell.sunday .calendar-day {
  color: red;
}

.calendar-cell.saturday .calendar-day {
  color: blue;
}

@media screen and (max-width: 600px) {
  .calendar-day {
    font-size: 1.1rem;
  }
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.8);
  display: none; /* ← 最初は非表示 */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 999;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #ccc;
  border-top: 4px solid #2196F3;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-text {
  margin-top: 10px;
  font-size: 1rem;
  color: #333;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.login-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(240, 240, 240, 0.95);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.login-dialog {
  background: #fff;
  padding: 24px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
  text-align: center;
}

.login-dialog input {
  padding: 8px;
  font-size: 1rem;
  margin-top: 8px;
  margin-bottom: 12px;
  width: 200px;
}

.login-dialog button {
  padding: 8px 16px;
  font-size: 1rem;
  cursor: pointer;
  width: auto; /* ← これでボタンが内容に合わせて縮む */
  min-width: 120px; /* ← 最低サイズだけ確保 */
}

.login-error {
  color: red;
  font-size: 0.9rem;
  margin-top: 8px;
}

.task-first {
  background-color: #ffcccc; /* 赤っぽい */
  border-left: 4px solid red;
}

.task-6m {
  background-color: #ffe0f0; /* ピンク */
  border-left: 4px solid pink;
}

.task-12m {
  background-color: #e0f0ff; /* 青系 */
  border-left: 4px solid #3399ff;
}

.task-tire {
  background-color: #e0ffff; /* 水色 */
  border-left: 4px solid #00cccc;
}

.task-oil {
  background-color: #f5f5dc; /* ベージュ */
  border-left: 4px solid #d2b48c;
}

.task-other {
  background-color: #eeeeee; /* グレー */
  border-left: 4px solid #999;
}