/* =========================================
   6. 캘린더 전용 스타일 (모바일 최적화 버전)
   ========================================= */

.calendar-container {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

/* ========== 캘린더 툴바 ========== */
.calendar-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1.5rem 3rem 1.5rem; 
    background: white !important;
    gap: 1rem;
    /* 폴드·좁은 화면에서 버튼이 잘리지 않게 줄바꿈 */
    flex-wrap: wrap;
    row-gap: 10px;
}

/* 왼쪽 그룹: 네비게이션 + 타이틀 */
.toolbar-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* 오른쪽 그룹: 액션 버튼들 */
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    row-gap: 8px;
}

.calendar-nav {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* ⭐ 캘린더 전용 버튼 스타일 */
.btn-nav,
.btn-today,
.btn-off,
.btn-off-list,
.btn-add {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-nav,
.btn-today {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-nav:hover,
.btn-today:hover {
    background: var(--gray-200);
}

.btn-today {
    background: var(--primary-600);
    color: white;
}

.btn-today:hover {
    background: var(--primary-700);
}

.btn-off {
    background: var(--danger-600);
    color: white;
}

.btn-off:hover {
    background: var(--danger-700);
}

.btn-off-list {
    background: var(--warning-500);
    color: white;
}

.btn-off-list:hover {
    background: var(--warning-600);
}

.btn-add {
    background: var(--primary-600);
    color: white;
}

.btn-add:hover {
    background: var(--primary-700);
}

.calendar-title {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--gray-900);
    white-space: nowrap;
}

/* ========== 캘린더 헤더 (요일) ========== */
.calendar-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background: white !important; 
    border-bottom: 2px solid var(--gray-300);
}

.calendar-day-name {
    background: var(--primary-50);
    padding: var(--spacing-3);
    text-align: center;
    font-size: var(--text-sm);
    font-weight: var(--font-bold);
    color: var(--primary-700);
}

.calendar-day-name.sunday {
    color: var(--danger-600);
    background: var(--danger-50);
}

.calendar-day-name.saturday {
    color: var(--info-600);
    background: var(--info-50);
}

/* ========== 캘린더 그리드 ========== */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background: var(--gray-200);
    border: 1px solid var(--gray-200);
}

/* ========== 캘린더 날짜 셀 ========== */
.calendar-cell {
    background: white;
    min-height: 120px;
    padding: var(--spacing-2);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.calendar-cell:hover {
    background: var(--gray-50);
    box-shadow: inset 0 0 0 2px var(--primary-200);
}

.calendar-cell.other-month {
    background: var(--gray-50);
    opacity: 0.5;
}

.calendar-cell.today {
    background: var(--primary-50);
    box-shadow: inset 0 0 0 2px var(--primary-300);
}

.calendar-cell.sunday {
    background: #fef2f2;
}

.calendar-cell.saturday {
    background: #eff6ff;
}

.calendar-cell.has-event {
    border-top: 3px solid var(--primary-500);
}

/* ========== 셀 날짜 표시 ========== */
.cell-date {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--gray-700);
    margin-bottom: var(--spacing-2);
    line-height: 1;
    padding: var(--spacing-1);
}

.calendar-cell.today .cell-date {
    color: white;
    background: var(--primary-600);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.calendar-cell.other-month .cell-date {
    color: var(--gray-400);
}

.calendar-cell.sunday .cell-date {
    color: var(--danger-600);
}

.calendar-cell.saturday .cell-date {
    color: var(--info-600);
}

/* ========== 예약/이벤트 표시 ========== */
.cell-reservations,
.cell-events {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
    overflow-y: auto;
    flex: 1;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
}

.reservation-item,
.event-item {
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    border-left: 3px solid;
    background: var(--gray-50);
    cursor: pointer;
    transition: all var(--transition-fast);
    line-height: 1.4;
}

.reservation-item:hover,
.event-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

/* 예약 타입별 색상 */
.reservation-item.morning {
    border-left-color: var(--success-500);
    background: var(--success-50);
    color: var(--success-900);
}

.reservation-item.afternoon {
    border-left-color: var(--info-500);
    background: var(--info-50);
    color: var(--info-900);
}

.reservation-item.evening {
    border-left-color: var(--warning-500);
    background: var(--warning-50);
    color: var(--warning-900);
}

.reservation-item.allday {
    border-left-color: var(--primary-500);
    background: var(--primary-50);
    color: var(--primary-900);
}

/* 상태별 색상 */
.reservation-item.confirmed {
    border-left-color: var(--success-500);
}

.reservation-item.pending {
    border-left-color: var(--warning-500);
}

.reservation-item.cancelled {
    border-left-color: var(--danger-500);
    opacity: 0.6;
    text-decoration: line-through;
}

/* ========== 예약 상세 정보 ========== */
.reservation-time {
    font-weight: var(--font-bold);
    color: var(--gray-900);
    margin-bottom: var(--spacing-1);
}

.reservation-info {
    color: var(--gray-600);
    font-size: 0.7rem;
    line-height: 1.3;
}

.reservation-teacher {
    font-size: 0.65rem;
    color: var(--gray-500);
    margin-top: var(--spacing-1);
}

.reservation-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-700);
    color: white;
    font-size: 0.65rem;
    font-weight: var(--font-bold);
    border-radius: var(--radius-full);
    padding: 2px 6px;
    margin-left: var(--spacing-1);
}

/* ========== OFF 표시 ========== */
.off-indicator {
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    font-weight: var(--font-bold);
    text-align: center;
    margin-top: var(--spacing-1);
    border: 1px solid;
}

.off-official,
.off-full {
    background: var(--danger-100) !important;
    color: var(--danger-700);
    border-color: var(--danger-300);
}

.off-morning {
    background: var(--warning-100) !important;
    color: var(--warning-700);
    border-color: var(--warning-300);
}

.off-afternoon {
    background: #e1bee7 !important;
    color: #7b1fa2;
    border-color: #ce93d8;
}

/* ========== 더 많은 이벤트 표시 ========== */
.more-events {
    padding: var(--spacing-1) var(--spacing-2);
    text-align: center;
    font-size: var(--text-xs);
    color: var(--primary-600);
    font-weight: var(--font-semibold);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.more-events:hover {
    background: var(--primary-100);
}

/* ========== 캘린더 범례 ========== */
.calendar-legend {
    display: flex;
    gap: var(--spacing-4);
    padding: var(--spacing-4) var(--spacing-6);
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--text-sm);
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: var(--radius-sm);
    border: 2px solid;
}

/* ========================================
   반응형 - 태블릿 (1024px 이하)
   ======================================== */
@media (max-width: 1024px) {
    .calendar-toolbar {
        padding: 1.25rem 1.25rem 2.5rem 1.25rem;
    }
    
    .toolbar-left {
        gap: 1rem;
    }
    
    .toolbar-right {
        gap: 0.5rem;
    }
    
    .calendar-title {
        font-size: var(--text-xl);
    }
    
    .calendar-cell {
        min-height: 100px;
    }
    
    .reservation-item,
    .event-item {
        font-size: 0.65rem;
        padding: var(--spacing-1) var(--spacing-2);
    }
    
    .reservation-info {
        font-size: 0.65rem;
    }
    
    .reservation-teacher {
        display: block;
        font-size: 0.6rem;
    }
}

/* ========================================
   반응형 - 모바일 (768px 이하)
   ⭐ UI 콤팩트 최적화 버전
   ======================================== */
@media (max-width: 768px) {
    .calendar-container {
        border-radius: var(--radius-lg);
    }
    
    /* 1. 툴바 간격 축소 */
    .calendar-toolbar {
        flex-direction: column;
        padding: 0.75rem;
        gap: 0.5rem;
    }
    
    /* ⭐ 타이틀 + 네비게이션을 세로로 배치 */
    .toolbar-left {
        width: 100%;
        flex-direction: column;
        gap: 0.5rem;
        align-items: center;
    }
    
    /* 2. 타이틀 크기 축소 */
    .calendar-title {
        font-size: 1.125rem;
        text-align: center;
        width: 100%;
    }
    
    /* 3. 네비게이션 1:1:1 그리드 + 높이 축소 */
    .calendar-nav {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        gap: 0.5rem;
        width: 100%;
    }
    
    .calendar-nav button,
    .btn-nav,
    .btn-today {
        padding: 0.5rem !important;
        font-size: 0.875rem !important;
        min-height: 38px !important;
        max-height: 38px !important;
        height: 38px !important;
        white-space: nowrap;
        flex: 1 1 0 !important; /* 완전 동일 너비 */
        width: auto !important;
    }
    
    /* 4. 액션 버튼 1:1:1 그리드 + 높이 축소 */
    .toolbar-right {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        gap: 0.5rem;
        width: 100%;
    }
    
    .toolbar-right button,
    .btn-off,
    .btn-off-list,
    .btn-add {
        padding: 0.5rem !important;
        font-size: 0.875rem !important;
        min-height: 38px !important;
        max-height: 38px !important;
        height: 38px !important;
        white-space: nowrap;
        flex: 1 1 0 !important; /* 완전 동일 너비 */
        width: auto !important;
    }
    
    /* 5. 요일 헤더 높이 축소 */
    .calendar-day-name {
        padding: 0.5rem 0.25rem;
        font-size: 0.8125rem;
    }
    
    /* ⭐ 6. 캘린더 셀 높이 대폭 축소 (핵심!) */
    .calendar-cell {
        min-height: 70px;
        padding: 0.375rem;
    }
    
    /* 7. 날짜 표시 축소 */
    .cell-date {
        font-size: 0.8125rem;
        margin-bottom: 0.25rem;
    }
    
    .calendar-cell.today .cell-date {
        width: 24px;
        height: 24px;
        font-size: 0.8125rem;
    }
    
    /* 8. 예약 아이템 크기 축소 */
    .reservation-item,
    .event-item {
        font-size: 0.6875rem;
        padding: 0.25rem 0.375rem;
        border-left-width: 2px;
    }
    
    /* 9. 예약 상세 축소 */
    .reservation-time {
        font-size: 0.6875rem;
        margin-bottom: 0.125rem;
    }
    
    .reservation-info {
        font-size: 0.625rem;
    }
    
    .reservation-count {
        font-size: 0.5625rem;
        padding: 1px 4px;
    }
    
    .calendar-title {
        font-size: 1.25rem;
        order: -1;
        text-align: center;
        width: 100%;
    }
    
    .calendar-nav {
        width: 100%;
        justify-content: center;
        gap: 0.5rem;
    }
    
    .calendar-nav button {
        padding: 0.625rem 1rem;
        font-size: 0.9375rem;
        min-height: 44px;
    }
    
    .toolbar-right button {
        padding: 0.625rem 0.875rem;
        font-size: 0.875rem;
        min-height: 44px;
    }
    
    .calendar-day-name {
        padding: 0.5rem 0.25rem;
        font-size: 0.75rem;
    }
    
    .calendar-cell {
        min-height: 90px;
        padding: 0.375rem;
    }
    
    .cell-date {
        font-size: 0.8125rem;
        margin-bottom: 0.375rem;
    }
    
    .calendar-cell.today .cell-date {
        width: 26px;
        height: 26px;
        font-size: 0.8125rem;
    }
    
    .reservation-item,
    .event-item {
        font-size: 0.6875rem;
        padding: 0.375rem 0.5rem;
        border-left-width: 2px;
        line-height: 1.3;
    }
    
    .reservation-time {
        font-size: 0.75rem;
        margin-bottom: 0.25rem;
    }
    
    .reservation-info {
        display: none;
    }
    
    .reservation-teacher {
        display: none;
    }
    
    .reservation-count {
        font-size: 0.625rem;
        padding: 1px 5px;
    }
    
    .off-indicator {
        font-size: 0.6875rem;
        padding: 0.25rem 0.375rem;
    }
    
    .more-events {
        font-size: 0.6875rem;
        padding: 0.25rem 0.375rem;
    }
    
    .calendar-legend {
        padding: 0.75rem;
        gap: 0.5rem;
        flex-direction: column;
    }
    
    .legend-item {
        font-size: 0.8125rem;
    }
    
    .legend-color {
        width: 14px;
        height: 14px;
    }
}

/* ========================================
   반응형 - 작은 모바일 (480px 이하)
   ======================================== */
@media (max-width: 480px) {
    .calendar-toolbar {
        padding: 0.75rem;
        gap: 0.625rem;
    }
    
    .toolbar-left,
    .toolbar-right {
        gap: 0.5rem;
    }
    
    .calendar-title {
        font-size: 1.125rem;
    }
    
    .calendar-nav {
        gap: 0.375rem;
    }
    
    .calendar-nav button {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
        min-height: 40px;
    }
    
    .toolbar-right button {
        padding: 0.5rem 0.625rem;
        font-size: 0.8125rem;
        white-space: nowrap;
        min-height: 40px;
    }
    
    .calendar-day-name {
        padding: 0.375rem 0.125rem;
        font-size: 0.6875rem;
    }
    
    .calendar-cell {
        min-height: 75px;
        padding: 0.25rem;
    }
    
    .cell-date {
        font-size: 0.75rem;
        margin-bottom: 0.25rem;
        padding: 0.125rem;
    }
    
    .calendar-cell.today .cell-date {
        width: 24px;
        height: 24px;
        font-size: 0.75rem;
    }
    
    .reservation-item,
    .event-item {
        font-size: 0.625rem;
        padding: 0.25rem 0.375rem;
        border-left-width: 2px;
        gap: 0.125rem;
    }
    
    .reservation-time {
        font-size: 0.6875rem;
        margin-bottom: 0.125rem;
    }
    
    .reservation-count {
        font-size: 0.5625rem;
        padding: 1px 4px;
    }
    
    .off-indicator {
        font-size: 0.625rem;
        padding: 0.25rem 0.375rem;
    }
    
    .more-events {
        font-size: 0.625rem;
        padding: 0.25rem 0.375rem;
    }
    
    .calendar-legend {
        padding: 0.625rem;
        gap: 0.375rem;
    }
    
    .legend-item {
        font-size: 0.75rem;
        gap: 0.375rem;
    }
    
    .legend-color {
        width: 12px;
        height: 12px;
    }
}

/* ========================================
   반응형 - 초소형 모바일 (360px 이하)
   ======================================== */
@media (max-width: 360px) {
    .calendar-toolbar {
        padding: 0.625rem;
        gap: 0.5rem;
    }
    
    .toolbar-left,
    .toolbar-right {
        gap: 0.375rem;
    }
    
    .calendar-title {
        font-size: 1rem;
    }
    
    .calendar-nav button {
        padding: 0.375rem 0.625rem;
        font-size: 0.8125rem;
        min-height: 36px;
    }
    
    .toolbar-right button {
        padding: 0.375rem 0.5rem;
        font-size: 0.75rem;
        min-height: 36px;
    }
    
    .calendar-day-name {
        padding: 0.25rem 0.125rem;
        font-size: 0.625rem;
    }
    
    .calendar-cell {
        min-height: 65px;
        padding: 0.1875rem;
    }
    
    .cell-date {
        font-size: 0.6875rem;
        margin-bottom: 0.1875rem;
    }
    
    .calendar-cell.today .cell-date {
        width: 22px;
        height: 22px;
        font-size: 0.6875rem;
    }
    
    .reservation-item,
    .event-item {
        font-size: 0.5625rem;
        padding: 0.1875rem 0.3125rem;
        border-left-width: 2px;
    }
    
    .reservation-time {
        font-size: 0.625rem;
    }
    
    .reservation-count {
        font-size: 0.5rem;
        padding: 1px 3px;
    }
    
    .off-indicator {
        font-size: 0.5625rem;
        padding: 0.1875rem 0.3125rem;
    }
    
    .more-events {
        font-size: 0.5625rem;
        padding: 0.1875rem 0.3125rem;
    }
}

/* ========================================
   가로 모드 최적화
   ======================================== */
@media (max-height: 600px) and (orientation: landscape) {
    .calendar-toolbar {
        padding: 0.625rem;
    }
    
    .calendar-cell {
        min-height: 70px;
    }
    
    .cell-reservations,
    .cell-events {
        max-height: 45px;
    }
    
    .calendar-day-name {
        padding: 0.375rem;
    }
}

@media (max-height: 500px) and (orientation: landscape) {
    .calendar-toolbar {
        padding: 0.5rem;
    }
    
    .calendar-title {
        font-size: 1rem;
    }
    
    .calendar-nav button,
    .toolbar-right button {
        padding: 0.375rem 0.625rem;
        font-size: 0.8125rem;
    }
    
    .calendar-cell {
        min-height: 60px;
    }
    
    .cell-reservations,
    .cell-events {
        max-height: 35px;
    }
}

/* ========================================
   터치 디바이스 최적화
   ======================================== */
@media (hover: none) and (pointer: coarse) {
    /* 터치 타겟 최소 44px */
    .calendar-nav button {
        min-height: 44px;
        min-width: 44px;
        padding: 0.75rem 1rem;
    }
    
    .toolbar-right button {
        min-height: 44px;
        padding: 0.75rem 1rem;
    }
    
    .calendar-cell {
        cursor: default;
        min-height: 100px;
        -webkit-tap-highlight-color: transparent;
    }
    
    .calendar-cell:active {
        background: var(--gray-100);
    }
    
    .reservation-item,
    .event-item {
        min-height: 36px;
        padding: 0.5rem 0.625rem;
        font-size: 0.8125rem;
        -webkit-tap-highlight-color: transparent;
    }
    
    .reservation-item:active,
    .event-item:active {
        transform: scale(0.98);
        opacity: 0.9;
    }
    
    .more-events {
        min-height: 36px;
        padding: 0.5rem;
        -webkit-tap-highlight-color: transparent;
    }
    
    .more-events:active {
        background: var(--primary-200);
    }
    
    /* 스크롤 개선 */
    .cell-reservations,
    .cell-events {
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
    }
    
    /* 호버 효과 제거 */
    .calendar-cell:hover {
        background: white;
        box-shadow: none;
    }
    
    .calendar-cell.today:hover {
        background: var(--primary-50);
    }
    
    .reservation-item:hover,
    .event-item:hover {
        transform: none;
        box-shadow: none;
    }
}

/* ========================================
   접근성 개선
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    .calendar-cell,
    .reservation-item,
    .event-item,
    .more-events {
        transition: none;
    }
}

/* 고대비 모드 */
@media (prefers-contrast: high) {
    .calendar-cell {
        border: 1px solid var(--gray-400);
    }
    
    .calendar-header {
        border-bottom-width: 3px;
    }
    
    .reservation-item,
    .event-item {
        border-left-width: 4px;
    }
}

/* ========================================
   다크모드 대응 (선택적)
   ======================================== */
@media (prefers-color-scheme: dark) {
    /* 필요시 다크모드 스타일 추가 */
}

/* ========================================
   프린트 스타일
   ======================================== */
@media print {
    .calendar-toolbar {
        background: white;
        border-bottom: 2px solid black;
    }
    
    .toolbar-right {
        display: none;
    }
    
    .calendar-cell {
        page-break-inside: avoid;
        min-height: 100px;
    }
    
    .calendar-cell:hover {
        background: white;
        box-shadow: none;
    }
    
    .reservation-item:hover,
    .event-item:hover {
        transform: none;
        box-shadow: none;
    }
    
    .calendar-legend {
        page-break-before: avoid;
    }
}