/* 時間割ラッパー (self-introduction 和モダン グリッド) */
.timetable-wrapper {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.timetable-scroll-area {
  overflow-x: auto;
}

.timetable-grid {
  display: grid;
  grid-template-columns: 86px repeat(5, minmax(180px, 1fr));
  min-width: 980px;
  background-color: var(--color-line);
  gap: 1px;
}

/* ヘッダーセル (曜日) */
.timetable-header {
  background-color: var(--color-bg);
  padding: 14px 12px;
  text-align: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.03em;
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.timetable-header.is-today {
  background-color: color-mix(in srgb, var(--color-matcha) 14%, var(--color-bg));
  color: var(--color-matcha-light);
}

.timetable-header-badge {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 1px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--color-matcha);
  color: var(--color-bg);
  letter-spacing: 0.05em;
}

/* 時限セル (左端) */
.period-cell {
  background-color: var(--color-bg);
  padding: 14px 8px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  user-select: none;
}

.period-num {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
}

.period-time {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-weight: 500;
  margin-top: 3px;
}

/* コマセル (授業スロット) */
.course-cell {
  background-color: var(--color-bg);
  padding: 8px;
  min-height: 124px;
  position: relative;
  transition: background-color var(--transition-fast);
  cursor: pointer;
}

.course-cell:hover {
  background-color: color-mix(in srgb, var(--color-surface) 60%, var(--color-bg));
}

.course-cell.is-today-col {
  background-color: color-mix(in srgb, var(--color-matcha) 4%, var(--color-bg));
}
.course-cell.is-today-col:hover {
  background-color: color-mix(in srgb, var(--color-matcha) 9%, var(--color-bg));
}

/* 空きコマ */
.course-cell.is-empty {
  display: flex;
  align-items: center;
  justify-content: center;
}

.empty-slot-btn {
  opacity: 0;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-xs);
  background-color: var(--color-surface);
  border: 1px dashed var(--color-line-strong);
  transition: all var(--transition-fast);
}

.course-cell.is-empty:hover .empty-slot-btn {
  opacity: 1;
  color: var(--color-matcha-light);
  border-color: var(--color-matcha);
  background-color: color-mix(in srgb, var(--color-matcha) 12%, var(--color-surface));
  transform: scale(1.04);
}

/* 登録済み科目カード (self-introduction 和モダンカードの質感) */
.course-card {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 12px;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-matcha);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.course-card:hover {
  transform: translateY(-2px);
  background-color: var(--color-surface-2);
  border-color: var(--color-line-strong);
  box-shadow: var(--shadow-md);
}

/* テーマカラーによる左ボーダー修飾 */
.course-card.theme-indigo { border-left-color: #6366f1; }
.course-card.theme-forest { border-left-color: var(--color-matcha); }
.course-card.theme-teal   { border-left-color: #14b8a6; }
.course-card.theme-rose   { border-left-color: var(--danger); }
.course-card.theme-amber  { border-left-color: var(--warning); }
.course-card.theme-purple { border-left-color: #a855f7; }

.course-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
  line-height: 1.35;
  word-break: break-all;
}

.course-meta {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 0.76rem;
  color: var(--color-text-muted);
}

.course-room,
.course-instructor {
  display: flex;
  align-items: center;
  gap: 5px;
}

.course-meta-icon {
  font-size: 0.85em;
  opacity: 0.8;
}

.course-tasks-badge {
  margin-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  background-color: var(--danger-bg);
  color: #ff9da6;
  border: 1px solid var(--danger-border);
  align-self: flex-start;
  box-shadow: 0 1px 4px rgba(244, 91, 105, 0.2);
}

/* モーダル内リスト用補助クラス */
.tasks-empty--compact {
  padding: 24px;
}

.task-item--mb {
  margin-bottom: 8px;
}