/* Course schedule — page-specific (DESIGN.md tokens) */

.cs-app {
  max-width: 1600px;
  margin: 0 auto;
  padding: var(--spacing-24);
}

.cs-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-16);
  margin-bottom: var(--spacing-24);
  padding-bottom: var(--spacing-16);
  border-bottom: 0.5px solid var(--color-graphite);
}

.cs-header h1 {
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-w510);
  color: var(--color-paper);
  letter-spacing: var(--tracking-subheading);
}

.cs-actions {
  display: flex;
  gap: var(--spacing-8);
}

.cs-main {
  display: flex;
  gap: var(--spacing-24);
  align-items: flex-start;
}

.cs-sidebar {
  flex-shrink: 0;
  width: 260px;
  min-width: 260px;
  background: var(--color-carbon);
  border-radius: var(--radius-cards);
  border: 0.5px solid var(--color-graphite);
  padding: var(--spacing-20);
  box-shadow: var(--shadow-subtle);
}

.cs-sidebar-header {
  margin-bottom: var(--spacing-20);
}

.cs-sidebar-header h2 {
  font-size: var(--text-caption);
  font-weight: var(--font-weight-w510);
  color: var(--color-fog);
  margin-bottom: var(--spacing-12);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.cs-add-subject {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
}

.cs-add-subject input {
  width: 100%;
  padding: var(--spacing-12) var(--spacing-14, 14px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-inputs);
  background: rgba(255, 255, 255, 0.02);
  color: var(--color-mist);
  font-family: var(--font-inter-variable);
  font-size: 14px;
}

.cs-add-subject input::placeholder {
  color: var(--color-fog);
}

.cs-add-subject input:focus {
  outline: none;
  border-color: var(--color-mist);
}

.cs-subject-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
  max-height: 60vh;
  overflow-y: auto;
  margin: 0;
  padding: 0;
}

.cs-subject-list .subject-item {
  padding: var(--spacing-12) var(--spacing-16);
  border-radius: var(--radius-buttons);
  cursor: grab;
  font-size: 14px;
  font-weight: var(--font-weight-w510);
  transition: transform 0.15s, opacity 0.15s;
  user-select: none;
  border: 1px solid transparent;
  color: var(--color-paper);
  text-align: center;
}

.cs-subject-list .subject-item:hover {
  transform: translateY(-1px);
  opacity: 0.92;
}

.cs-subject-list .subject-item:active {
  cursor: grabbing;
}

.cs-subject-list .subject-item.dragging {
  opacity: 0.7;
  transform: scale(0.98);
}

/* Subject colors — distinct per subject */
.cs-app .subject-item.color-0,
.cs-app .course-tag.color-0 { background: #4338ca; color: #fff; }
.cs-app .subject-item.color-1,
.cs-app .course-tag.color-1 { background: #b91c1c; color: #fff; }
.cs-app .subject-item.color-2,
.cs-app .course-tag.color-2 { background: #047857; color: #fff; }
.cs-app .subject-item.color-3,
.cs-app .course-tag.color-3 { background: #6d28d9; color: #fff; }
.cs-app .subject-item.color-4,
.cs-app .course-tag.color-4 { background: #0e7490; color: #fff; }
.cs-app .subject-item.color-5,
.cs-app .course-tag.color-5 { background: #c2410c; color: #fff; }
.cs-app .subject-item.color-6,
.cs-app .course-tag.color-6 { background: #a16207; color: #fff; }
.cs-app .subject-item.color-7,
.cs-app .course-tag.color-7 { background: #be185d; color: #fff; }
.cs-app .subject-item.color-8,
.cs-app .course-tag.color-8 { background: #1d4ed8; color: #fff; }
.cs-app .subject-item.color-9,
.cs-app .course-tag.color-9 { background: #0f766e; color: #fff; }
.cs-app .subject-item.color-10,
.cs-app .course-tag.color-10 { background: #7c3aed; color: #fff; }
.cs-app .subject-item.color-11,
.cs-app .course-tag.color-11 { background: #374151; color: #fff; }
.cs-app .subject-item.color-12,
.cs-app .course-tag.color-12 { background: #0369a1; color: #fff; }
.cs-app .subject-item.color-13,
.cs-app .course-tag.color-13 { background: #4d7c0f; color: #fff; }
.cs-app .subject-item.color-14,
.cs-app .course-tag.color-14 { background: #9f1239; color: #fff; }
.cs-app .subject-item.color-15,
.cs-app .course-tag.color-15 { background: #5b21b6; color: #fff; }

.cs-schedule-wrap {
  flex: 1;
  min-width: 0;
  overflow-x: auto;
}

.cs-schedule-table-wrap {
  background: var(--color-carbon);
  border-radius: var(--radius-cards);
  border: 0.5px solid var(--color-graphite);
  overflow: hidden;
  box-shadow: var(--shadow-subtle);
}

.cs-schedule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.cs-schedule-table th,
.cs-schedule-table td {
  border: 0.5px solid var(--color-graphite);
  padding: 0;
  vertical-align: middle;
  text-align: center;
}

.cs-schedule-table thead th {
  background: var(--color-obsidian);
  color: var(--color-fog);
  font-weight: var(--font-weight-w510);
  padding: var(--spacing-12) var(--spacing-8);
  font-size: var(--text-caption);
}

.cs-schedule-table .th-time {
  width: 88px;
  min-width: 88px;
  color: var(--color-mist);
}

.cs-schedule-table .td-time {
  background: var(--color-obsidian);
  color: var(--color-fog);
  font-weight: var(--font-weight-regular);
  padding: var(--spacing-8);
  width: 88px;
  min-width: 88px;
  font-size: var(--text-caption);
}

.cs-schedule-table .cell {
  width: 120px;
  height: 56px;
  padding: 0;
  cursor: pointer;
  transition: background 0.15s;
  overflow: visible;
  background: var(--color-carbon);
  vertical-align: middle;
}

.cs-schedule-table .cell:hover {
  background: var(--color-obsidian);
}

.cs-schedule-table .cell.drag-over {
  background: rgba(228, 242, 34, 0.08);
  box-shadow: inset 0 0 0 1px var(--color-acid-lime);
}

.cs-schedule-table .cell .course-tag {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 56px;
  padding: 0 24px 0 8px;
  border-radius: 0;
  font-size: 14px;
  font-weight: var(--font-weight-w510);
  cursor: default;
  box-sizing: border-box;
}

.cs-schedule-table .cell .course-tag__label {
  pointer-events: none;
}

.cs-schedule-table .cell .course-tag .remove {
  position: absolute;
  top: 4px;
  right: 6px;
  opacity: 0.9;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  font-weight: var(--font-weight-w510);
  color: inherit;
}

.cs-schedule-table .cell .course-tag .remove:hover {
  opacity: 1;
}

.cs-schedule-table .cell.empty-hint::after {
  content: '拖放科目';
  font-size: 12px;
  color: var(--color-fog);
  opacity: 0.6;
}

@media (max-width: 1000px) {
  .cs-main {
    flex-direction: column;
  }

  .cs-sidebar {
    width: 100%;
    min-width: 0;
  }

  .cs-add-subject {
    flex-direction: row;
    align-items: stretch;
  }

  .cs-add-subject .btn {
    width: auto;
    min-width: 100px;
    white-space: nowrap;
  }

  .cs-schedule-table .cell {
    min-width: 80px;
    min-height: 48px;
    font-size: 12px;
  }
}