/* ============================================================
   timetable.css — 课程表面板样式
   工具栏 / CSS Grid周课表 / 列表视图 / 弹窗表单
   ============================================================ */

/* ---- Toolbar ---- */
.timetable-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  padding: 12px 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.timetable-toolbar-left,
.timetable-toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.timetable-label {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.timetable-select {
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: 0.9rem;
  cursor: pointer;
}

.timetable-select:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* ---- Time Slots Config ---- */
.timetable-timeslots {
  margin-bottom: 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0 16px;
}

.timetable-timeslots summary {
  padding: 10px 0;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--color-text-secondary);
}

.timeslot-info {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 8px;
  padding-bottom: 14px;
}

.timeslot-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 12px;
  background-color: var(--color-surface-hover);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
}

.timeslot-label {
  font-weight: 500;
  color: var(--color-text);
}

.timeslot-time {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ---- Grid Wrapper ---- */
.timetable-grid-wrapper {
  position: relative;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  -webkit-overflow-scrolling: touch;
}

/* ---- CSS Grid Timetable ---- */
.timetable-grid {
  display: grid;
  grid-template-columns: 32px 70px repeat(7, 1fr);
  /* grid-template-rows 由 JS 根据实际最大节次动态设置 */
  min-width: 720px;
}

/* Corner cell (top-left) */
.timetable-corner {
  grid-row: 1;
  grid-column: 1 / span 2;
  position: sticky;
  top: 0;
  left: 0;
  z-index: 3;
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  border-right: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

/* Weekday headers */
.timetable-weekday-header {
  grid-row: 1;
  position: sticky;
  top: 0;
  z-index: 2;
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  border-right: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
  padding: 4px;
}

.timetable-weekday-header:last-child {
  border-right: none;
}

/* Section labels (left column) */
.timetable-section-label {
  grid-column: 2;
  position: sticky;
  left: 32px;
  z-index: 1;
  background-color: var(--color-surface);
  border-right: 2px solid var(--color-border);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2px 4px;
  font-size: 0.7rem;
  line-height: 1.3;
}

.section-num {
  font-weight: 600;
  color: var(--color-text-secondary);
}

.section-time {
  color: var(--color-text-muted);
  font-size: 0.65rem;
  font-family: var(--font-mono);
}

/* Period group labels (上午/下午/晚上) */
.timetable-period-label {
  grid-column: 1;
  position: sticky;
  left: 0;
  z-index: 2;
  background-color: var(--color-surface);
  border-right: 2px solid var(--color-border);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  letter-spacing: 2px;
  padding: 4px 2px;
}

/* Grid cells */
.timetable-cell {
  border-bottom: 1px solid var(--color-border-light);
  border-right: 1px solid var(--color-border-light);
  cursor: pointer;
  transition: background-color var(--transition), box-shadow var(--transition);
  position: relative;
}

.timetable-cell:hover {
  box-shadow: inset 0 0 0 2px var(--color-primary);
  z-index: 1;
}

.timetable-cell-empty:hover {
  background-color: var(--color-primary-bg) !important;
}

/* Course block in grid */
.timetable-course {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4px 6px;
  overflow: hidden;
  border-radius: 3px;
  margin: 1px;
}

.timetable-course-name {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.timetable-course-teacher {
  font-size: 0.65rem;
  color: var(--color-text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.timetable-course-location {
  font-size: 0.6rem;
  color: var(--color-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.timetable-course-weeks {
  font-size: 0.58rem;
  color: var(--color-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 1px;
}

/* Empty cell with dashed border */
.timetable-cell-empty {
  border: 1px dashed var(--color-border-light);
}

/* Weekend columns slightly dimmed */
.timetable-cell[data-weekday="6"],
.timetable-cell[data-weekday="7"] {
  /* Saturday & Sunday columns */
}

.timetable-weekday-header[data-weekday="6"],
.timetable-weekday-header[data-weekday="7"] {
  color: var(--color-text-muted);
}

/* ---- Empty State ---- */
.timetable-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
  color: var(--color-text-muted);
}

.timetable-empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.6;
}

.timetable-empty p {
  font-size: 1rem;
  margin: 4px 0;
}

.timetable-empty-hint {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  max-width: 320px;
}

/* ---- List View ---- */
.timetable-list-view {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.timetable-list-day {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.timetable-list-day-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
  background-color: var(--color-surface);
  transition: background-color var(--transition);
}

.timetable-list-day-header:hover {
  background-color: var(--color-surface-hover);
}

.timetable-list-courses {
  padding: 0 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.timetable-list-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background-color: var(--color-surface-hover);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: box-shadow var(--transition);
}

.timetable-list-card:hover {
  box-shadow: var(--color-card-shadow);
}

.timetable-list-card-main {
  flex: 1;
  min-width: 0;
}

.timetable-list-card-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 3px;
}

.timetable-list-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ---- View Switcher ---- */
#btn-cycle-view {
  padding: 6px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  min-width: 120px;
}

#btn-cycle-view:hover {
  background: var(--color-primary-dark);
}

/* ---- Day View ---- */
.timetable-day-view {
  margin-top: 16px;
}

.day-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
  padding: 10px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.day-label {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  min-width: 60px;
  text-align: center;
}

.timetable-day-grid {
  display: grid;
  grid-template-columns: 32px 70px 1fr;
  /* grid-template-rows set by JS */
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-surface);
}

.day-time-label {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2px 4px;
  border-right: 2px solid var(--color-border);
  border-bottom: 1px solid var(--color-border-light);
  background-color: var(--color-surface);
  font-size: 0.7rem;
  line-height: 1.3;
}

.day-course-block {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4px 10px;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border-light);
  cursor: pointer;
  transition: box-shadow var(--transition);
  border-radius: 3px;
  margin: 1px;
}

.day-course-block:hover {
  box-shadow: inset 0 0 0 2px var(--color-primary);
}

.day-cell-empty {
  border-bottom: 1px dashed var(--color-border-light);
  cursor: pointer;
  transition: background-color var(--transition);
}

.day-cell-empty:hover {
  background-color: var(--color-primary-bg);
}

/* ---- Month View ---- */
.timetable-month-view {
  margin-top: 16px;
}

.month-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
  padding: 10px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.month-label {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  min-width: 120px;
  text-align: center;
}

.month-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-surface);
}

.month-day-header {
  padding: 8px 4px;
  text-align: center;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  background-color: var(--color-surface-hover);
  border-bottom: 2px solid var(--color-border);
}

.month-day-header:nth-child(6),
.month-day-header:nth-child(7) {
  color: var(--color-text-muted);
}

.month-cell {
  min-height: 72px;
  padding: 6px;
  border-bottom: 1px solid var(--color-border-light);
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: background-color var(--transition);
}

.month-cell:nth-child(7n) {
  border-right: none;
}

.month-cell-empty {
  background-color: var(--color-surface-hover);
  opacity: 0.5;
}

.month-cell-today {
  background-color: var(--color-primary-bg);
}

.month-cell-today .month-cell-date {
  background-color: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.month-cell-has-course {
  cursor: pointer;
}

.month-cell-has-course:hover {
  background-color: var(--color-surface-hover);
  box-shadow: inset 0 0 0 2px var(--color-primary);
}

.month-cell-date {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text);
}

.month-cell-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  justify-content: center;
}

.month-cell-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.month-cell-more {
  font-size: 0.6rem;
  color: var(--color-text-muted);
  line-height: 1;
}

/* ---- Responsive ---- */
@media (max-width: 1023px) {
  .timetable-course-name {
    font-size: 0.72rem;
  }
}

/* ---- Course Name Dropdown ---- */
.course-name-row {
  display: flex;
  gap: 6px;
  align-items: stretch;
}

.course-name-dropdown {
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: 0.85rem;
  cursor: pointer;
  max-width: 200px;
  transition: border-color var(--transition);
}

.course-name-dropdown:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-bg);
}

.course-name-dropdown optgroup {
  font-weight: 600;
  color: var(--color-text-secondary);
  font-style: normal;
}

/* ---- Week Pattern Selector ---- */
.course-weeks-mode-select {
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: 0.85rem;
  cursor: pointer;
  margin-bottom: 6px;
  width: 100%;
}

/* ---- Week Grid (for custom selection) ---- */
.course-weeks-grid {
  display: grid;
  grid-template-columns: repeat(11, 1fr);
  gap: 4px;
  margin-top: 6px;
  padding: 8px;
  background: var(--color-surface-hover);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.week-grid-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px 2px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  user-select: none;
  transition: all 0.15s ease;
  background: var(--color-surface);
  touch-action: none; /* 防止移动端滚动干扰拖选 */
}

.week-grid-cell:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.week-grid-cell-active {
  background: var(--color-primary) !important;
  color: #fff !important;
  border-color: var(--color-primary-dark) !important;
  font-weight: 600;
}

/* ---- Mobile Section Labels: 自适应竖排 ---- */
@media (max-width: 767px) {
  .timetable-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 10px 12px;
  }

  .timetable-toolbar-left,
  .timetable-toolbar-right {
    justify-content: space-between;
  }

  .timetable-grid {
    grid-template-columns: 24px 54px repeat(7, 1fr);
    min-width: 580px;
    font-size: 0.7rem;
  }

  /* Section labels: 当屏幕太窄时，时间和节次竖排显示 */
  .timetable-section-label {
    left: 24px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3px 2px;
    gap: 2px;
    line-height: 1.2;
  }

  .timetable-section-label .section-num {
    font-size: 0.6rem;
    writing-mode: horizontal-tb; /* 节次保持横排 */
    white-space: nowrap;
  }

  .timetable-section-label .section-time {
    font-size: 0.52rem;
    white-space: nowrap;
    writing-mode: horizontal-tb; /* 时间也横排 */
    /* 如果时间太长导致溢出，自动换行 */
    max-width: 50px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* 对于有较多文字的时间段，让 section-label 更宽 */
  .timetable-section-label .section-time {
    max-width: 50px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* 自适应：检测内容溢出转为竖排 */
  .timetable-section-label.vertical-time {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    gap: 4px;
    padding: 4px 2px;
  }

  .timetable-section-label.vertical-time .section-time {
    font-size: 0.52rem;
    white-space: nowrap;
    max-width: none;
  }

  .timetable-section-label.vertical-time .section-num {
    font-size: 0.6rem;
  }

  .timetable-period-label {
    font-size: 0.65rem;
    letter-spacing: 1px;
    padding: 2px 1px;
  }

  .timetable-course-name {
    font-size: 0.65rem;
  }

  .timetable-course-teacher,
  .timetable-course-location,
  .timetable-course-weeks {
    display: none;
  }

  .timeslot-info {
    grid-template-columns: 1fr 1fr;
  }

  .timetable-day-grid {
    grid-template-columns: 24px 54px 1fr;
  }

  .day-time-label {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3px 2px;
    gap: 2px;
    line-height: 1.2;
  }

  .day-time-label .section-num {
    font-size: 0.6rem;
    writing-mode: horizontal-tb;
    white-space: nowrap;
  }

  .day-time-label .section-time {
    font-size: 0.52rem;
    white-space: nowrap;
    writing-mode: horizontal-tb;
    max-width: 50px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .day-time-label.vertical-time {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    gap: 4px;
    padding: 4px 2px;
  }

  .day-time-label.vertical-time .section-time,
  .day-time-label.vertical-time .section-num {
    max-width: none;
  }

  .month-cell {
    min-height: 56px;
    padding: 4px;
  }

  .month-cell-date {
    font-size: 0.75rem;
  }

  .month-cell-dot {
    width: 5px;
    height: 5px;
  }

  .view-btn {
    padding: 4px 8px;
    font-size: 0.72rem;
  }

  /* Course dropdown on mobile */
  .course-name-row {
    flex-direction: column;
  }

  .course-name-dropdown {
    max-width: none;
    font-size: 0.8rem;
  }

  /* Week grid on mobile */
  .course-weeks-grid {
    grid-template-columns: repeat(6, 1fr);
    gap: 3px;
    padding: 6px;
  }

  .week-grid-cell {
    padding: 3px 1px;
    font-size: 0.65rem;
  }
}

@media (max-width: 400px) {
  .course-weeks-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

/* ---- Week Indicator ---- */
.week-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  margin-bottom: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--color-text);
}

.btn-week-nav {
  width: 28px;
  height: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  font-family: inherit;
}

.btn-week-nav:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.week-label {
  font-weight: 500;
}

.week-label strong {
  color: var(--color-primary);
  font-size: 1.1rem;
}

.week-date-range {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.week-no-date-hint {
  font-size: 0.75rem;
  color: var(--color-warning);
}

/* ---- Conflict Visualization ---- */
.timetable-course-conflict {
  border: 2px dashed var(--color-danger) !important;
  animation: conflict-pulse 2s ease-in-out infinite;
  position: relative;
}

@keyframes conflict-pulse {
  0%, 100% { border-color: var(--color-danger); }
  50% { border-color: transparent; }
}

.timetable-conflict-badge {
  position: absolute;
  top: 2px;
  right: 4px;
  font-size: 0.65rem;
  z-index: 2;
  pointer-events: none;
}

/* ---- Inactive Week (course not active in current week) ---- */
.timetable-course-inactive-week {
  opacity: 0.35;
  filter: grayscale(0.5);
}

/* ---- Drag & Drop ---- */
.timetable-course-dragging {
  cursor: grabbing;
}

.timetable-course-drag-source {
  opacity: 0.3;
  border: 2px dashed var(--color-primary) !important;
}

.timetable-cell-drop-target {
  border: 2px dashed var(--color-primary) !important;
  background-color: var(--color-primary-bg) !important;
  cursor: pointer;
}

/* ---- Exam Weeks Form ---- */
.exam-weeks-form {
  padding: 8px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-top: 8px;
  width: 100%;
}

.exam-weeks-form input[type="number"] {
  padding: 4px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: inherit;
  text-align: center;
}

/* ---- Day View Conflict ---- */
.day-course-block.timetable-course-conflict {
  border: 2px dashed var(--color-danger) !important;
  animation: conflict-pulse 2s ease-in-out infinite;
}