:root {
  --bg-canvas: #F3F6FA;
  --bg-surface: #FFFFFF;
  --bg-subtle: #F8FAFC;
  --bg-elevated: #EFF4FF;

  --ink-primary: #0F172A;
  --ink-secondary: #334155;
  --ink-muted: #64748B;
  --ink-faint: #94A3B8;

  --border-hairline: #E2E8F0;
  --border-strong: #CBD5E1;

  --accent-primary: #1D4ED8;
  --accent-hover: #1E40AF;
  --accent-soft: #DBEAFE;

  --ok-emerald: #059669;
  --ok-bg: #ECFDF5;
  --ok-border: #A7F3D0;

  --warn-amber: #D97706;
  --warn-bg: #FFFBEB;

  --conflict-crimson: #DC2626;
  --conflict-bg: #FEF2F2;
  --conflict-border: #FECACA;

  --font-display: 'Plus Jakarta Sans', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-sans: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.1), 0 4px 10px -3px rgba(15, 23, 42, 0.05);
  --shadow-modal: 0 24px 48px -12px rgba(15, 23, 42, 0.25);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-canvas);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.hidden {
  display: none !important;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ==================== 整体骨架 ==================== */
.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  max-width: 1720px;
  margin: 0 auto;
  padding: 14px 20px 28px;
  gap: 12px;
}

/* ==================== 顶部导航栏 ==================== */
.topbar {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: var(--shadow-xs);
  flex-wrap: wrap;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: #0F172A;
  padding: 7px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
  flex-shrink: 0;
}

.brand-grid-dot {
  border-radius: 3px;
  background: #475569;
}

.brand-grid-dot.accent {
  background: #38BDF8;
}

.brand-grid-dot.conflict {
  background: #F43F5E;
}

.brand-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink-primary);
}

.term-badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-primary);
  background: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 999px;
  font-family: var(--font-mono);
}

.brand-subtitle {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--ink-muted);
}

/* 模式切换胶囊 */
.mode-switcher {
  display: inline-flex;
  background: #EEF2F7;
  padding: 3px;
  border-radius: 10px;
  border: 1px solid var(--border-hairline);
}

.mode-btn {
  border: none;
  background: transparent;
  color: var(--ink-secondary);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 7px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.16s ease;
}

.mode-btn:hover {
  color: var(--ink-primary);
}

.mode-btn.active {
  background: var(--bg-surface);
  color: var(--accent-primary);
  box-shadow: var(--shadow-xs);
}

/* 右侧工具区 */
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.action-divider {
  width: 1px;
  height: 22px;
  background: var(--border-hairline);
  margin: 0 2px;
}

/* 冲突状态指示灯按钮 */
.conflict-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s ease;
  font-family: var(--font-mono);
}

.conflict-status-pill.clean {
  background: var(--ok-bg);
  color: var(--ok-emerald);
  border: 1px solid var(--ok-border);
}

.conflict-status-pill.clean .status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok-emerald);
}

.conflict-status-pill.alert {
  background: var(--conflict-bg);
  color: var(--conflict-crimson);
  border: 1px solid var(--conflict-border);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.08);
}

.conflict-status-pill.alert .status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--conflict-crimson);
  animation: pulseDot 1.4s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.35); opacity: 0.55; }
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 13px;
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn-sm {
  padding: 6px 11px;
  font-size: 12.5px;
}

.btn-xs {
  padding: 4px 9px;
  font-size: 12px;
}

.btn-primary {
  background: var(--accent-primary);
  color: #FFFFFF;
}

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

.btn-secondary {
  background: var(--bg-subtle);
  color: var(--ink-primary);
  border-color: var(--border-strong);
}

.btn-secondary:hover {
  background: #EDF2F7;
}

.btn-ghost {
  background: transparent;
  color: var(--ink-secondary);
  border-color: var(--border-hairline);
}

.btn-ghost:hover {
  background: var(--bg-subtle);
  color: var(--ink-primary);
  border-color: var(--border-strong);
}

.btn-danger {
  background: var(--conflict-bg);
  color: var(--conflict-crimson);
  border-color: var(--conflict-border);
}

.btn-danger:hover {
  background: #FEE2E2;
}

.btn-icon {
  border: 1px solid var(--border-hairline);
  background: var(--bg-subtle);
  color: var(--ink-secondary);
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.btn-icon:hover {
  background: #E2E8F0;
  color: var(--ink-primary);
}

/* ==================== 公开查询模式横幅 ==================== */
.public-query-banner {
  background: linear-gradient(125deg, #0F172A 0%, #1E3A8A 100%);
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 16px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: var(--shadow-sm);
}

.public-banner-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #93C5FD;
  margin-bottom: 4px;
}

.public-banner-title {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
}

.public-banner-desc {
  margin: 0;
  font-size: 13px;
  color: #CBD5E1;
}

/* ==================== 冲突雷达抽屉 ==================== */
.conflict-drawer {
  background: #FFFDFD;
  border: 1px solid var(--conflict-border);
  border-left: 4px solid var(--conflict-crimson);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-sm);
}

.conflict-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.conflict-drawer-title {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.conflict-drawer-title h3 {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-primary);
}

.conflict-drawer-sub {
  font-size: 12.5px;
  color: var(--ink-muted);
}

.hazard-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--conflict-crimson);
  color: #FFFFFF;
}

.conflict-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 8px;
}

.conflict-item-card {
  background: var(--bg-surface);
  border: 1px solid var(--conflict-border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.conflict-item-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.conflict-item-head {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--conflict-crimson);
}

.conflict-item-desc {
  font-size: 12px;
  color: var(--ink-secondary);
}

.conflict-empty-notice {
  grid-column: 1 / -1;
  background: var(--ok-bg);
  border: 1px solid var(--ok-border);
  color: var(--ok-emerald);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-weight: 600;
  font-size: 13px;
}

/* ==================== 二级控制台 ==================== */
.control-deck {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--shadow-xs);
}

.control-row-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.perspective-tabs {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.perspective-tab {
  border: 1px solid var(--border-hairline);
  background: var(--bg-subtle);
  color: var(--ink-secondary);
  padding: 7px 13px;
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transition: all 0.15s ease;
}

.perspective-tab:hover {
  border-color: var(--border-strong);
  color: var(--ink-primary);
}

.perspective-tab.active {
  background: var(--ink-primary);
  color: #FFFFFF;
  border-color: var(--ink-primary);
}

.tab-count {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 999px;
  background: rgba(100, 116, 139, 0.16);
}

.perspective-tab.active .tab-count {
  background: rgba(255, 255, 255, 0.22);
  color: #FFFFFF;
}

.filter-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.segmented-group {
  display: inline-flex;
  background: var(--bg-subtle);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.seg-btn {
  border: none;
  background: transparent;
  color: var(--ink-secondary);
  font-size: 12.5px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
}

.seg-btn.active {
  background: var(--bg-surface);
  color: var(--accent-primary);
  box-shadow: var(--shadow-xs);
}

.filter-select {
  height: 34px;
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 0 10px;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--ink-primary);
  background: var(--bg-subtle);
}

.search-box {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 0 10px;
  height: 34px;
  min-width: 230px;
}

.search-box:focus-within {
  border-color: var(--accent-primary);
  background: var(--bg-surface);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  width: 100%;
  font-size: 13px;
  color: var(--ink-primary);
}

/* 实体胶囊选择条 */
.entity-pill-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-wrap: wrap;
  padding-top: 8px;
  border-top: 1px dashed var(--border-hairline);
}

.entity-pill-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-muted);
  margin-right: 4px;
}

.entity-pill {
  border: 1px solid var(--border-hairline);
  background: var(--bg-surface);
  color: var(--ink-secondary);
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.14s ease;
}

.entity-pill:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.entity-pill.active {
  background: var(--accent-primary);
  color: #FFFFFF;
  border-color: var(--accent-primary);
  font-weight: 600;
}

.entity-pill-sub {
  font-size: 11px;
  opacity: 0.78;
  font-family: var(--font-mono);
}

/* ==================== 统计摘要条 ==================== */
.metrics-strip {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 10px;
}

.metric-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  box-shadow: var(--shadow-xs);
}

.metric-label {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink-muted);
}

.metric-value {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--ink-primary);
}

.metric-value.has-conflict {
  color: var(--conflict-crimson);
}

.metric-meta {
  font-size: 11.5px;
  color: var(--ink-muted);
}

/* ==================== 课表主网格 ==================== */
.timetable-stage {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  flex: 1;
}

.timetable-scroll-container {
  overflow-x: auto;
  width: 100%;
}

.timetable-grid {
  width: 100%;
  min-width: 1040px;
  border-collapse: collapse;
  table-layout: fixed;
}

.timetable-grid th,
.timetable-grid td {
  border-bottom: 1px solid var(--border-hairline);
  border-right: 1px solid var(--border-hairline);
}

.timetable-grid th:last-child,
.timetable-grid td:last-child {
  border-right: none;
}

/* 表头：节次列 + 星期列 */
.timetable-grid thead th {
  background: #F8FAFC;
  padding: 11px 10px;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 2px solid var(--border-strong);
}

.col-period-header {
  width: 132px;
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-secondary);
}

.day-header-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.day-name {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-primary);
}

.day-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-muted);
}

th.is-today {
  background: #EFF6FF !important;
}

th.is-today .day-name {
  color: var(--accent-primary);
}

.today-pill {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 999px;
  background: var(--accent-primary);
  color: #FFFFFF;
  margin-left: 4px;
}

/* 时段分组分隔行（上午 / 下午 / 晚上） */
.section-divider-row td {
  background: #F1F5F9;
  padding: 5px 14px;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--ink-secondary);
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border-strong);
}

/* 左侧节次时间单元格 */
.period-cell {
  background: #FAFBFD;
  padding: 10px 10px;
  text-align: center;
  vertical-align: middle;
  width: 132px;
}

.period-index-badge {
  display: inline-block;
  font-weight: 700;
  font-size: 12.5px;
  color: var(--ink-primary);
  margin-bottom: 3px;
}

.period-time-range {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-muted);
  background: #EEF2F7;
  padding: 2px 6px;
  border-radius: 4px;
}

/* 课表槽位单元格 */
.slot-cell {
  vertical-align: top;
  padding: 6px;
  min-height: 94px;
  height: 98px;
  position: relative;
  transition: background-color 0.12s ease;
}

.slot-cell.is-today-col {
  background: rgba(239, 246, 255, 0.35);
}

.slot-cell.drag-over {
  background: #DBEAFE !important;
  outline: 2px dashed var(--accent-primary);
  outline-offset: -3px;
}

.slot-cards-stack {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 78px;
}

/* 空槽快捷排课引导按钮 */
.slot-quick-add {
  opacity: 0;
  width: 100%;
  min-height: 30px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink-muted);
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all 0.14s ease;
  margin-top: auto;
}

.slot-cell:hover .slot-quick-add {
  opacity: 1;
}

.slot-quick-add:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: #EFF6FF;
}

/* 公开查询模式下隐藏空槽新增按钮 */
body.mode-public .slot-quick-add,
body.mode-public [data-admin-only="true"] {
  display: none !important;
}

/* ==================== 课程卡片设计 ==================== */
.course-card {
  position: relative;
  border-radius: 7px;
  padding: 7px 9px 7px 11px;
  background: var(--card-bg, #EFF6FF);
  border: 1px solid var(--card-border, #BFDBFE);
  border-left: 4px solid var(--card-accent, #2563EB);
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  display: flex;
  flex-direction: column;
  gap: 4px;
  user-select: none;
}

.course-card:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* 冲突状态课程卡片：建筑工程斜纹警示 */
.course-card.has-conflict {
  border-color: var(--conflict-crimson);
  border-left-width: 5px;
  border-left-color: var(--conflict-crimson);
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(220, 38, 38, 0.04),
    rgba(220, 38, 38, 0.04) 8px,
    transparent 8px,
    transparent 16px
  );
}

.course-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 4px;
}

.course-title {
  font-weight: 700;
  font-size: 12.5px;
  color: var(--ink-primary);
  line-height: 1.3;
  word-break: break-word;
}

.course-badges {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  flex-shrink: 0;
}

.badge-week {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 4px;
  background: rgba(15, 23, 42, 0.08);
  color: var(--ink-secondary);
}

.badge-span {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--card-accent, #2563EB);
  color: #FFFFFF;
}

.course-meta-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  font-size: 11.5px;
  color: var(--ink-secondary);
}

.course-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.course-meta-item.room-code {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--ink-primary);
}

.course-note {
  font-size: 11px;
  color: var(--ink-muted);
  border-top: 1px dashed rgba(15, 23, 42, 0.1);
  padding-top: 3px;
  margin-top: 1px;
}

.course-conflict-banner {
  margin-top: 2px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--conflict-crimson);
  color: #FFFFFF;
  font-size: 10.5px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==================== 底部图例与状态栏 ==================== */
.app-footer {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.legend-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--ink-secondary);
  cursor: pointer;
  padding: 2px 7px;
  border-radius: 999px;
  border: 1px solid transparent;
}

.legend-item:hover {
  background: var(--bg-subtle);
  border-color: var(--border-hairline);
}

.legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 3px;
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--ink-muted);
}

/* ==================== 模态框系统 ==================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.48);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}

.modal-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-modal);
  overflow: hidden;
}

.modal-lg {
  max-width: 740px;
}

.modal-header {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border-hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-primary);
  letter-spacing: 0.06em;
}

.modal-title {
  margin: 2px 0 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
}

.modal-body {
  padding: 18px 22px;
  overflow-y: auto;
}

.modal-footer {
  padding: 14px 22px;
  border-top: 1px solid var(--border-hairline);
  background: var(--bg-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.modal-footer-left,
.modal-footer-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 实时冲突预检条 */
.live-precheck-bar {
  padding: 10px 22px;
  background: var(--ok-bg);
  border-bottom: 1px solid var(--ok-border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.live-precheck-bar.has-conflict {
  background: var(--conflict-bg);
  border-bottom-color: var(--conflict-border);
}

.precheck-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.precheck-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ok-emerald);
}

.live-precheck-bar.has-conflict .precheck-dot {
  background: var(--conflict-crimson);
}

.precheck-channels {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.channel-pill {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
}

.channel-pill.ok {
  background: rgba(5, 150, 105, 0.12);
  color: var(--ok-emerald);
}

.channel-pill.conflict {
  background: var(--conflict-crimson);
  color: #FFFFFF;
}

.precheck-detail {
  font-size: 12px;
  color: var(--conflict-crimson);
  background: rgba(255, 255, 255, 0.75);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
}

/* 表单网格 */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.col-span-2 {
  grid-column: span 2;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-field label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-secondary);
}

.req {
  color: var(--conflict-crimson);
}

.form-field input,
.form-field select,
.mono-textarea {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 11px;
  font-family: var(--font-sans);
  font-size: 13.5px;
  color: var(--ink-primary);
  background: var(--bg-surface);
  outline: none;
}

.form-field input:focus,
.form-field select:focus,
.mono-textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.12);
}

.form-hint {
  font-size: 12px;
  color: var(--ink-muted);
}

/* ==================== 节次编辑器 ==================== */
.preset-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
  padding: 10px 12px;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-hairline);
}

.preset-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-secondary);
}

.periods-editor-header {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr 110px;
  gap: 8px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-muted);
  border-bottom: 1px solid var(--border-hairline);
}

.periods-editor-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 10px 0 14px;
  max-height: 340px;
  overflow-y: auto;
}

.period-edit-row {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr 110px;
  gap: 8px;
  align-items: center;
  background: var(--bg-subtle);
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-hairline);
}

.period-edit-row input,
.period-edit-row select {
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  padding: 5px 8px;
  font-size: 13px;
  background: var(--bg-surface);
}

.period-row-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  justify-content: flex-end;
}

.periods-add-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

/* ==================== 档案与标签管理 ==================== */
.institution-config-bar {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 10px;
  align-items: end;
  padding: 12px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
}

.catalog-tabs {
  display: flex;
  gap: 6px;
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 10px;
  margin-bottom: 12px;
}

.catalog-tab {
  border: 1px solid var(--border-hairline);
  background: var(--bg-subtle);
  color: var(--ink-secondary);
  padding: 6px 13px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
}

.catalog-tab.active {
  background: var(--accent-primary);
  color: #FFFFFF;
  border-color: var(--accent-primary);
}

.catalog-add-form {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
  padding: 10px;
  background: #F8FAFC;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border-strong);
}

.catalog-add-form input {
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  padding: 6px 10px;
  font-size: 13px;
  flex: 1;
  min-width: 130px;
}

.catalog-add-form input[type="color"] {
  flex: 0 0 42px;
  min-width: 42px;
  height: 34px;
  padding: 2px;
  cursor: pointer;
}

.catalog-items-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 8px;
  max-height: 280px;
  overflow-y: auto;
}

.catalog-item-card {
  border: 1px solid var(--border-hairline);
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.catalog-item-main {
  display: flex;
  align-items: center;
  gap: 8px;
}

.catalog-color-dot {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  flex-shrink: 0;
}

.catalog-item-name {
  font-weight: 700;
  font-size: 13px;
}

.catalog-item-sub {
  font-size: 11.5px;
  color: var(--ink-muted);
}

/* ==================== 导入导出弹窗 ==================== */
.data-actions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.data-action-box {
  border: 1px solid var(--border-hairline);
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 14px;
}

.data-action-box h3 {
  margin: 0 0 6px;
  font-size: 14px;
}

.data-action-box p {
  margin: 0 0 12px;
  font-size: 12.5px;
  color: var(--ink-secondary);
}

.btn-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.mono-textarea {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 12px;
  resize: vertical;
}

.file-upload-btn {
  cursor: pointer;
}

/* ==================== Toast 提示 ==================== */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 200;
}

.toast-msg {
  background: #0F172A;
  color: #FFFFFF;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  border-left: 4px solid #38BDF8;
  animation: slideInUp 0.18s ease-out;
}

.toast-msg.warn {
  border-left-color: #F59E0B;
}

.toast-msg.error {
  border-left-color: #EF4444;
}

@keyframes slideInUp {
  from { transform: translateY(10px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ==================== 打印样式 (@media print) ==================== */
@media print {
  body {
    background: #FFFFFF;
  }
  .topbar-actions,
  .mode-switcher,
  .conflict-drawer,
  .control-deck,
  .public-query-banner,
  .slot-quick-add,
  .app-footer,
  .modal-backdrop,
  .toast-container {
    display: none !important;
  }
  .app-shell {
    padding: 0;
    max-width: none;
  }
  .timetable-stage {
    box-shadow: none;
    border: 1px solid #000;
  }
  .course-card {
    break-inside: avoid;
    box-shadow: none !important;
  }
}

/* ==================== 响应式适配 ==================== */
@media (max-width: 960px) {
  .metrics-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .data-actions-grid,
  .form-grid,
  .institution-config-bar {
    grid-template-columns: 1fr;
  }
  .col-span-2 {
    grid-column: span 1;
  }
}