:root {
  --row-h: 48px;
  --primary: #4472C4;
  --primary-dark: #2F5496;
  --primary-light: #D9E1F2;
  --bg: #f5f6fa;
  --card-bg: #fff;
  --text: #1a1a2e;
  --text-light: #6c757d;
  --border: #e0e3eb;
  --danger: #e74c3c;
  --warning: #f39c12;
  --success: #27ae60;
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
  --radius: 10px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

.app { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
  width: 220px;
  background: var(--primary-dark);
  color: #fff;
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
}

.logo {
  padding: 22px 20px;
  font-size: 17px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.logo-icon { width: 32px; height: 32px; border-radius: 8px; object-fit: cover; }

.nav { flex: 1; padding: 12px 0; }

.nav-item {
  display: block;
  padding: 12px 24px;
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}
.nav-item:hover { background: rgba(255,255,255,0.1); color: #fff; }
.nav-item.active {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border-left-color: #fff;
}

.sidebar-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,0.1); }
.data-status {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  padding: 6px 10px;
  background: rgba(255,255,255,0.08);
  border-radius: 6px;
  text-align: center;
}
.data-status.active { color: #6ee7b7; background: rgba(110,231,183,0.15); }
.data-status .upload-time { display: block; font-size: 11px; opacity: 0.85; margin-top: 2px; }

/* Content */
.content { flex: 1; margin-left: 220px; padding: 18px clamp(14px, 1.8vw, 32px); min-height: 100vh; display: flex; flex-direction: column; }

.week-bar {
  margin-bottom: 0;
  padding: 0 6px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  font-size: 14px;
  height: 36px;
  box-sizing: border-box;
}
.week-bar label { font-weight: 600; }
.week-bar select {
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  background: #fff;
  height: 36px;
  min-width: 80px;
  max-width: 120px;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23999' d='M5 6L0 0h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

.view { display: none; width: 100%; }
.view.active { display: block; animation: fadeIn 0.25s; }
#view-swap.view.active { display: flex; flex-direction: column; flex: 1; min-height: 0; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

h1 { font-size: 22px; margin-bottom: 6px; }
h2 { font-size: 17px; margin-bottom: 14px; }
.hint { color: var(--text-light); margin-bottom: 16px; }

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}
.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.stat-card .num { font-size: 30px; font-weight: 700; color: var(--primary); }
.stat-card .label { font-size: 13px; color: var(--text-light); margin-top: 4px; }
.stat-card.danger .num { color: var(--danger); }
.stat-card.warning .num { color: var(--warning); }
.stat-card.success .num { color: var(--success); }

/* Upload */
.upload-actions { margin-bottom: 16px; }
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 50px 20px;
  text-align: center;
  background: var(--card-bg);
  cursor: pointer;
  transition: all 0.2s;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--primary);
  background: var(--primary-light);
}
.drop-icon { font-size: 48px; margin-bottom: 12px; }
.drop-zone p { color: var(--text-light); margin-bottom: 16px; }

.upload-result { margin-top: 18px; }
.upload-result .alert {
  padding: 14px 18px;
  border-radius: 8px;
  margin-bottom: 10px;
}
.alert-success { background: #e8f8ee; color: var(--success); border: 1px solid #b7ebc6; }
.alert-error { background: #fdecea; color: var(--danger); border: 1px solid #f5c6cb; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 18px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
  background: var(--border);
  color: var(--text);
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: transparent; border: 1px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); }

.export-bar { margin: 18px 0; display: flex; gap: 10px; flex-wrap: wrap; }

/* Filter bar */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.filter-bar label { font-weight: 600; }
/* 班级/教师选择：外观与周次选择框（.week-bar）一致——单框、label 在前 */
.filter-group {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  font-size: 14px;
  padding: 0 6px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: border-color 0.15s, box-shadow 0.15s;
  height: 36px;
  box-sizing: border-box;
}
.filter-group:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(68,114,196,0.12);
}
.filter-group .filter-label { white-space: nowrap; font-weight: 600; }
/* combobox 输入框保留内边框，与周次选择框 select 的内边框一致 */
.filter-group .combobox-input-wrap {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
}
.filter-group .combobox-input-wrap:focus-within {
  border-color: var(--primary);
}
.filter-bar select {
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  min-width: 100px;
  max-width: 140px;
  background: #fff;
  height: 36px;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23999' d='M5 6L0 0h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

/* Schedule grid - 自适应 + 表头/首列固定 */
.schedule-grid-wrap {
  width: 100%;
  overflow: auto;                    /* 横向滚动（纵向由行高自适应控制） */
  -webkit-overflow-scrolling: touch;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  position: relative;
}
.schedule-grid {
  width: 100%;
  border-collapse: separate;         /* 改为 separate，sticky 才能生效 */
  border-spacing: 0;
  background: var(--card-bg);
  table-layout: fixed;
}
/* 表头固定：横向滚动时左侧固定，纵向滚动时顶部固定 */
.schedule-grid th {
  height: var(--row-h);
  position: sticky;
  top: 0;
  z-index: 3;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  padding: clamp(6px, 0.8vw, 10px) clamp(2px, 0.5vw, 6px);
  font-size: clamp(12px, 1vw, 14px);
  white-space: nowrap;
  border: 1px solid var(--border);
}
/* 首列（节次）固定：横向滚动时保持可见 */
.schedule-grid th:first-child,
.schedule-grid td:first-child {
  position: sticky;
  left: 0;
  z-index: 2;
  width: clamp(58px, 10%, 120px);
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: clamp(12px, 0.95vw, 14px);
  white-space: nowrap;
  border: 1px solid var(--border);
}
/* 左上角单元格 z-index 最高 */
.schedule-grid th:first-child {
  z-index: 4;
}
.schedule-grid td {
  border: 1px solid var(--border);
  padding: clamp(2px, 0.4vw, 5px) clamp(2px, 0.4vw, 5px);
  text-align: center;
  vertical-align: middle;
  word-wrap: break-word;
  word-break: break-word;
  overflow-wrap: break-word;
  background: var(--card-bg);
  /* 统一行高：无论有无课程，每行高度一致 */
  height: var(--row-h);
}
.schedule-grid .cell-has {
  background: #f8f9ff;
  padding: clamp(2px, 0.5vw, 6px) clamp(2px, 0.4vw, 5px);
}
.schedule-grid tbody { background: var(--card-bg); }
.schedule-grid .cell-empty { color: var(--border); }
/* 会议水印：教师需参加会议但该节无课时，以水印形式显示会议名 */
.schedule-grid td.cell-meeting {
  position: relative;
  background: #fffbe6;
}
.schedule-grid .meeting-watermark {
  font-size: clamp(10px, 0.75vw, 12px);
  color: rgba(212, 136, 6, 0.45);
  font-weight: 500;
  letter-spacing: 0.5px;
  pointer-events: none;
}
/* 冲突单元格：教师在同一节课教多个班级 */
.schedule-grid .cell-conflict {
  background: #fdecea;
  padding: 0;
  position: relative;
  overflow: hidden;
  max-height: var(--row-h);
}
.schedule-grid .cell-conflict .cell-subject {
  font-size: clamp(9px, 0.75vw, 11px);
  line-height: 1.1;
}
.schedule-grid .cell-conflict .cell-class {
  color: var(--danger);
  font-weight: 600;
  font-size: clamp(8px, 0.65vw, 10px);
  line-height: 1.1;
  margin-top: 0;
}
/* 重课单元格左右对半分割 */
.schedule-grid .cell-split {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  width: 100%;
  overflow: hidden;
}
.schedule-grid .cell-half {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(1px, 0.3vw, 3px) clamp(1px, 0.3vw, 3px);
  min-width: 0;
  overflow: hidden;
  transition: background-color 0.15s;
}
.schedule-grid .cell-half:first-child {
  border-right: 1px dashed rgba(0,0,0,0.15);
}
/* 重课单元格：hover 只高亮鼠标所在的那一半，而不是整个 td */
.schedule-grid td.cell-conflict:hover {
  background: #fdecea !important;
}
.schedule-grid .cell-conflict .cell-half:hover {
  background: #cde2f5;
}
/* 调课模式下，每半独立可选高亮 */
.schedule-grid .cell-half.cell-half-selected {
  background: #f5a3a3;
}
.schedule-grid .cell-half.cell-half-able {
  background: #a3c9f5;
}
.schedule-grid .cell-half.cell-half-target {
  background: #7ed67e;
}
/* 会议冲突高亮（橙色，与重课冲突的红色区分） */
.schedule-grid .cell-meeting-conflict {
  background: #fef5e7;
  padding: clamp(2px, 0.5vw, 6px) clamp(2px, 0.4vw, 5px);
}
.schedule-grid .cell-meeting-conflict .cell-subject,
.schedule-grid .cell-meeting-conflict .cell-class {
  color: #d48806;
  font-weight: 700;
}
/* 调休冲突高亮（紫色，与重课冲突红色、会议冲突橙色区分） */
.schedule-grid .cell-leave-conflict {
  background: #f4ecff;
  padding: clamp(2px, 0.5vw, 6px) clamp(2px, 0.4vw, 5px);
}
.schedule-grid .cell-leave-conflict .cell-subject,
.schedule-grid .cell-leave-conflict .cell-class {
  color: #8e44ad;
  font-weight: 700;
}
/* 教师课表下方冲突提示 */
.teacher-conflicts {
  margin-top: 12px;
}
.conflict-tips {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.conflict-tip {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  line-height: 1.5;
  padding: 6px 10px;
  background: #fff;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.conflict-tip-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-top: 5px;
  flex-shrink: 0;
}
.cell-subject {
  font-weight: 600;
  color: var(--primary-dark);
  font-size: clamp(11px, 0.95vw, 14px);
  line-height: 1.2;
}
.cell-teacher {
  font-size: clamp(10px, 0.8vw, 12px);
  color: var(--text-light);
  margin-top: 1px;
  line-height: 1.2;
}
.cell-class {
  font-size: clamp(10px, 0.8vw, 12px);
  color: var(--text-light);
  margin-top: 1px;
  line-height: 1.2;
}
.cell-location {
  font-size: clamp(9px, 0.75vw, 11px);
  color: #aaa;
  margin-top: 2px;
}

/* Tabs */
.tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 2px solid var(--border); }
.tab {
  padding: 10px 20px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-light);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Tables */
.table-wrap { overflow-x: auto; }
table.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
table.data-table th, table.data-table td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
}
table.data-table th {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  white-space: nowrap;
}
table.data-table tr:nth-child(even) td { background: #f8f9fb; }
table.data-table tr:hover td { background: var(--primary-light); }
.bar {
  height: 22px;
  background: var(--primary);
  border-radius: 4px;
  display: inline-block;
  min-width: 2px;
}

/* Analysis */
.analysis-detail { margin-top: 16px; }
.conflict-item {
  background: var(--card-bg);
  border-left: 4px solid var(--danger);
  border-radius: 6px;
  padding: 14px 18px;
  margin-bottom: 10px;
  box-shadow: var(--shadow);
}
.conflict-item.warning { border-left-color: var(--warning); }
.conflict-type {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  margin-right: 8px;
}
.conflict-type.teacher { background: #fdecea; color: var(--danger); }
.conflict-type.class { background: #fef3e0; color: var(--warning); }
.conflict-type.room { background: #e8f4fd; color: #2980b9; }
.conflict-type.meeting { background: #fef3e0; color: #e67e22; }
.conflict-type.leave { background: #f3e8fd; color: #8e44ad; }
.conflict-detail { margin: 8px 0; }
.conflict-entries { font-size: 12px; color: var(--text-light); }
.conflict-entries span { display: inline-block; margin-right: 14px; }

.no-data { text-align: center; padding: 60px 20px; color: var(--text-light); }
.no-data .icon { font-size: 48px; margin-bottom: 12px; }

/* Toast */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  padding: 12px 20px;
  background: var(--text);
  color: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.25s;
  pointer-events: none;
  z-index: 999;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { background: var(--danger); }
.toast.success { background: var(--success); }
.toast.info { background: var(--primary); }

@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .logo-text, .nav-item, .data-status { display: none; }
  .logo { justify-content: center; padding: 22px 0; }
  .content { margin-left: 60px; padding: 18px; }
}
/* 班级教师配置表：科目前行=课表表头风格（蓝底白字），教师行=课表内容风格（浅蓝灰字）
   border-collapse 合并中间双边框为1px，精确等于课表内容单元格的行高（~36.914px） */
.teacher-config-wrap {
  margin-bottom: 8px;
  width: 100%;
  max-height: none;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}
.teacher-config-table {
  width: 100%;
  border-collapse: collapse;   /* 关键：两行中间的边框合并为1px */
  border-spacing: 0;
  background: var(--card-bg);
  table-layout: fixed;
}
/* 任课教师表每一行高度：课表行高的2/3 */
.teacher-config-table tr {
  height: calc(var(--row-h) * 2 / 3);
}
/* 基础边框（统一 1px） */
.teacher-config-table td {
  border: 1px solid var(--border);
  text-align: center;
  vertical-align: middle;
  word-wrap: break-word;
  word-break: break-word;
  overflow-wrap: break-word;
}
/* 左侧占位列（占10%，和课表节次列同宽）：无内容，风格=课表的节次列背景色(蓝淡) */
.teacher-config-table .tc-td-ghost {
  background: var(--primary-light);
  color: var(--primary-dark);
  vertical-align: middle;
  text-align: center;
}
.teacher-config-table .tc-ghost-class {
  font-weight: 700;
  font-size: clamp(14px, 1.2vw, 18px);
  white-space: nowrap;
}
.teacher-config-table .tc-ghost-label {
  font-weight: 600;
  font-size: clamp(10px, 0.85vw, 13px);
  color: var(--primary);
  margin-top: 4px;
  white-space: nowrap;
}
/* 科目前行 td：蓝底白字（与课表表头th同色）；字号与课表 cell-subject 一致 */
.teacher-config-table .tc-td-subj {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: clamp(11px, 0.95vw, 14px);
  line-height: 1.2;
  white-space: nowrap;
  padding: clamp(2px, 0.5vw, 6px) clamp(2px, 0.4vw, 5px);
}
/* 教师行 td：浅蓝底（与课表 .cell-has 同色）；字号字色与课表 .cell-teacher 一致 */
.teacher-config-table .tc-td-tea {
  background: #f8f9ff;
  color: var(--text-light);
  font-weight: 500;
  font-size: clamp(10px, 0.8vw, 12px);
  line-height: 1.2;
  white-space: nowrap;
  padding: clamp(2px, 0.5vw, 6px) clamp(2px, 0.4vw, 5px);
}
/* 空单元格（无色透明，占位） */
.teacher-config-table .tc-td-empty {
  background: transparent;
  color: transparent;
}
/* 单元格悬停高亮：班级课表、教师课表
   排除：表头th（周一~周天）、首列节次（节次~晚4）、空单元格、重课单元格（由 cell-half 独立响应） */
.schedule-grid td:hover:not(.cell-empty):not(:first-child):not(.cell-conflict) {
  background: #cde2f5 !important;
  cursor: default;
}
/* 调课模式下禁用 hover 高亮 */
.swap-grid-wrap .schedule-grid td:hover,
.swap-ref-grid .schedule-grid td:hover {
  background: inherit !important;
  box-shadow: none !important;
}

/* 任课教师表悬停高亮：仅教师名行（tc-td-tea）生效
   排除：科目行（班主任/语文等）、占位列、空单元格 */
.teacher-config-table .tc-td-tea:hover {
  background: #cde2f5 !important;
  cursor: default;
}


/* ====== 可搜索的班级/教师选择 Combobox（扁平化+圆角，与课表同风格） ====== */
.combobox {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  width: clamp(100px, 12vw, 150px);
  vertical-align: middle;
}
.combobox-input-wrap {
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
  transition: border-color 0.15s, box-shadow 0.15s;
  height: 36px;
}
.combobox-input-wrap:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(68,114,196,0.12);
}
.combobox-input {
  width: 100%;
  padding: 7px 10px;
  border: none;
  outline: none;
  font-size: 14px;
  background: transparent;
  color: var(--text);
}
.combobox-input::placeholder { color: var(--text-light); font-size: 12.5px; }
.combobox-toggle {
  border: none;
  background: transparent;
  color: var(--text-light);
  padding: 8px 14px;
  font-size: 14px;
  cursor: pointer;
  line-height: 1;
  align-self: stretch;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, background 0.15s;
  border-left: 1px solid var(--border);
}
.combobox-toggle:hover { color: var(--primary); background: var(--primary-light); }

.combobox-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  max-height: 320px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  z-index: 50;
  display: none;
}
.combobox-dropdown.open { display: block; }
.combobox-item {
  padding: 9px 14px;
  font-size: 14px;
  cursor: pointer;
  border-bottom: 1px solid #f1f2f6;
  color: var(--text);
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
  transition: background 0.1s;
  text-overflow: ellipsis;
}
.combobox-item:last-child { border-bottom: none; }
.combobox-item:hover, .combobox-item.active { background: var(--primary-light); color: var(--primary-dark); }
.combobox-empty {
  padding: 12px;
  text-align: center;
  color: var(--text-light);
  font-size: 13px;
}
.combobox-item mark {
  background: #fff4a1;
  color: var(--text);
  padding: 0 1px;
  border-radius: 2px;
  font-weight: 600;
}
.combobox-group-title {
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  color: var(--primary);
  background: #eef3fb;
  border-bottom: 1px solid #e4eaf4;
  letter-spacing: 0.5px;
}


/* ====== 班级/教师筛选标签（单一搜索框 + ▾ 鼠标选择按钮）====== */
.filter-label {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  font-weight: 600;
  font-size: 13px;
  color: var(--text);
}

/* ====== 课表调整面板 ====== */
.swap-mode-select, .swap-class-select {
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  background: #fff;
  min-width: 100px;
  max-width: 140px;
  height: 36px;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23999' d='M5 6L0 0h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

/* 调课内容布局：主区域 + 右侧参考 */
.swap-content {
  display: flex;
  gap: 10px;
  align-items: stretch;
  margin-top: 8px;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}
.swap-main {
  flex: 1 1 50%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.swap-main h3 {
  font-size: 14px;
  margin-bottom: 6px;
  color: var(--primary-dark);
  flex-shrink: 0;
}
.swap-side {
  flex: 1 1 50%;
  min-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.swap-ref h3 {
  font-size: 13px;
  margin-bottom: 4px;
  color: var(--primary-dark);
  font-weight: 600;
}
.swap-ref-grid {
  overflow: auto;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

/* 主调课网格：压缩行高和内边距 */
.swap-grid-wrap {
  max-height: none !important;
  overflow: hidden !important;
  --row-h: 32px;
  border-radius: 8px;
  box-shadow: var(--shadow);
  background: var(--card-bg);
  flex-shrink: 0;
}
.swap-grid-wrap .schedule-grid th {
  height: 30px !important;
  padding: 2px 4px !important;
  font-size: 12px !important;
}
.swap-grid-wrap .schedule-grid td {
  height: 32px !important;
  padding: 2px 3px !important;
}
.swap-grid-wrap .schedule-grid .cell-subject {
  font-size: 12px !important;
}
.swap-grid-wrap .schedule-grid .cell-teacher,
.swap-grid-wrap .schedule-grid .cell-class {
  font-size: 10px !important;
}

/* 参考课表：更紧凑 */
.swap-ref-grid .schedule-grid th {
  height: 26px;
  padding: 1px 3px;
  font-size: 11px;
}
.swap-ref-grid .schedule-grid td {
  height: 26px;
  padding: 1px 2px;
}
.swap-ref-grid .schedule-grid .cell-subject {
  font-size: 10px;
}
.swap-ref-grid .schedule-grid .cell-teacher,
.swap-ref-grid .schedule-grid .cell-class {
  font-size: 9px;
}

/* 图例 */
.swap-legend {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  padding: 6px 14px;
  background: #f8f9fa;
  border-radius: 8px;
  margin-top: auto;
  font-size: 13px;
  line-height: 1.4;
  flex-shrink: 0;
}
.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 500;
}
.legend-color {
  display: inline-block;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 1px solid var(--border);
}
.legend-selected { background: #f5a3a3; }
.legend-swappable { background: #a3c9f5; }
.legend-target { background: #7ed67e; }
.legend-hint {
  color: var(--text-light);
  font-size: 12px;
  margin-left: auto;
  max-width: 600px;
  line-height: 1.4;
}

/* 调课记录列表 */
.swap-records-section {
  margin-top: 8px;
  padding: 6px 14px;
  background: #f8f9fa;
  border-radius: 8px;
  border: 1px solid var(--border);
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
}
.swap-records-section h3 {
  margin: 0 0 6px 0;
  font-size: 15px;
  color: var(--text);
  flex-shrink: 0;
}
.swap-records-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
}
.swap-record-item {
  padding: 4px 10px;
  background: #fff;
  border-radius: 4px;
  border: 1px solid #e8e8e8;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
}
.swap-record-empty {
  color: var(--text-light);
  font-size: 13px;
  padding: 8px 0;
}

/* 调课网格中单元格的交互样式 */
.swap-grid-wrap .schedule-grid td {
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
}
.swap-grid-wrap .schedule-grid td.cell-empty {
  cursor: default;
}
/* 当前教师课程高亮（班级课表模式中标记当前调课教师的课） */
.swap-grid-wrap .schedule-grid td.cell-own-teacher {
  background: #fff3cd !important;
}
.swap-grid-wrap .schedule-grid td.cell-own-teacher .cell-subject,
.swap-grid-wrap .schedule-grid td.cell-own-teacher .cell-teacher,
.swap-grid-wrap .schedule-grid td.cell-own-teacher .cell-class {
  color: #e67e22;
}
/* 选中状态（浅红） */
.swap-grid-wrap .schedule-grid td.cell-swap-selected {
  background: #f5a3a3 !important;
}
.swap-grid-wrap .schedule-grid td.cell-swap-selected .cell-subject,
.swap-grid-wrap .schedule-grid td.cell-swap-selected .cell-teacher,
.swap-grid-wrap .schedule-grid td.cell-swap-selected .cell-class {
  color: #333;
}
/* 可对调状态（浅蓝） */
.swap-grid-wrap .schedule-grid td.cell-swap-able {
  background: #a3c9f5 !important;
  cursor: pointer;
}
.swap-grid-wrap .schedule-grid td.cell-swap-able .cell-subject,
.swap-grid-wrap .schedule-grid td.cell-swap-able .cell-teacher,
.swap-grid-wrap .schedule-grid td.cell-swap-able .cell-class {
  color: #333;
}
/* 目标选中状态（浅绿） */
.swap-grid-wrap .schedule-grid td.cell-swap-target {
  background: #7ed67e !important;
}
.swap-grid-wrap .schedule-grid td.cell-swap-target .cell-subject,
.swap-grid-wrap .schedule-grid td.cell-swap-target .cell-teacher,
.swap-grid-wrap .schedule-grid td.cell-swap-target .cell-class {
  color: #333;
}
/* 禁选状态 */
.swap-grid-wrap .schedule-grid td.cell-swap-disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
/* 辅助课表同步高亮（与主课表同色） */
.swap-ref-grid .schedule-grid td.cell-swap-selected {
  background: #f5a3a3 !important;
}
.swap-ref-grid .schedule-grid td.cell-swap-able {
  background: #a3c9f5 !important;
}
.swap-ref-grid .schedule-grid td.cell-swap-target {
  background: #7ed67e !important;
}
/* 禁选原因提示 */
.swap-reject-tooltip {
  position: fixed;
  z-index: 1000;
  background: var(--text);
  color: #fff;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 12px;
  max-width: 280px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  pointer-events: none;
  display: none;
}

/* ===== 上传区域头部（登录按钮） ===== */
.upload-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.upload-header h1 { margin: 0; }
.login-btn {
  font-size: 14px;
  padding: 6px 18px;
}

/* ===== 弹窗 ===== */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal-box {
  background: #fff;
  border-radius: 12px;
  padding: 28px 32px;
  min-width: 360px;
  max-width: 440px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
.modal-box h2 {
  margin: 0 0 16px 0;
  font-size: 20px;
}
.modal-box p {
  color: #666;
  margin: 0 0 20px 0;
}
.modal-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}
.remember-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-light);
  cursor: pointer;
  user-select: none;
}
.remember-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}
.input {
  padding: 8px 12px;
  border: 1px solid #d0d0d0;
  border-radius: 6px;
  font-size: 14px;
  outline: none;
  width: 100%;
  box-sizing: border-box;
}
.input:focus {
  border-color: var(--primary, #4472C4);
}

/* ===== 账号管理 ===== */
.accounts-section {
  margin-bottom: 32px;
}
.accounts-section h2 {
  font-size: 16px;
  margin: 0 0 12px 0;
}
.account-actions {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  align-items: center;
  flex-wrap: wrap;
}
.account-actions .input {
  width: auto;
  min-width: 160px;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.data-table th, .data-table td {
  padding: 8px 12px;
  border: 1px solid #e0e0e0;
  text-align: left;
}
.data-table th {
  background: #f5f5f5;
  font-weight: 600;
}
.btn-sm {
  padding: 4px 12px;
  font-size: 12px;
}
.btn-danger {
  background: #e74c3c;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
.btn-danger:hover {
  background: #c0392b;
}
.text-muted {
  color: #aaa;
  font-size: 12px;
}

/* 教师安排表（总览页） */
.teacher-arr-card { padding: 12px; }
:root { --ta-row-h: 28px; }
.teacher-arrangement {
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 8px;
}
.teacher-arr-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  table-layout: auto;
  font-size: clamp(10px, 0.85vw, 13px);
  border-radius: 8px;
  overflow: hidden;
}
.teacher-arr-table th,
.teacher-arr-table td {
  border: 1px solid var(--border);
  padding: 2px 4px;
  text-align: center;
  height: var(--ta-row-h);
  word-break: break-word;
  overflow-wrap: break-word;
}
.teacher-arr-table th {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  position: sticky;
  top: 0;
  z-index: 2;
  white-space: nowrap;
}
.teacher-arr-table th:first-child,
.teacher-arr-table td:first-child {
  position: sticky;
  left: 0;
  z-index: 1;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 600;
  white-space: nowrap;
  min-width: 55px;
}
.teacher-arr-table th:nth-child(2),
.teacher-arr-table td:nth-child(2) {
  white-space: nowrap;
  min-width: 60px;
}
.teacher-arr-table .ta-teacher { color: var(--text); }
.teacher-arr-table .ta-headteacher { color: var(--primary-dark); font-weight: 600; }
/* 聚光灯高亮 - 教师安排表 */
.teacher-arr-table td.ta-spotlight-col,
.teacher-arr-table td.ta-spotlight-row,
.teacher-arr-table th.ta-spotlight-col,
.teacher-arr-table th.ta-spotlight-row {
  background: #e8f0fe !important;
  color: var(--primary-dark) !important;
}
.teacher-arr-table td.ta-spotlight-col.ta-spotlight-row,
.teacher-arr-table th.ta-spotlight-col.ta-spotlight-row {
  background: #d0e0fc !important;
  color: var(--primary-dark) !important;
}
/* 节次时间（8作息时间表） */
.schedule-grid .period-time {
  font-size: clamp(9px, 0.7vw, 11px);
  color: var(--text-light);
  margin-top: 2px;
  font-weight: 400;
  white-space: nowrap;
}
/* 教师课表单元格内的时段 */
.schedule-grid .cell-time {
  font-size: clamp(8px, 0.65vw, 10px);
  color: var(--text-light);
  margin-top: 2px;
  font-weight: 400;
  white-space: nowrap;
  line-height: 1.2;
}
/* 聚光灯高亮 - 班级/教师课表 */
.schedule-grid td.sc-spotlight-col,
.schedule-grid td.sc-spotlight-row,
.schedule-grid th.sc-spotlight-col,
.schedule-grid th.sc-spotlight-row {
  background: #e8f0fe !important;
  color: var(--primary-dark) !important;
}
.schedule-grid td.sc-spotlight-col.sc-spotlight-row,
.schedule-grid th.sc-spotlight-col.sc-spotlight-row {
  background: #d0e0fc !important;
  color: var(--primary-dark) !important;
}
/* 四角圆角 */
.teacher-arr-table thead tr:first-child th:first-child { border-top-left-radius: 8px; }
.teacher-arr-table thead tr:first-child th:last-child { border-top-right-radius: 8px; }
.teacher-arr-table tbody tr:last-child td:first-child { border-bottom-left-radius: 8px; }
.teacher-arr-table tbody tr:last-child td:last-child { border-bottom-right-radius: 8px; }