/* 班主任工作台样式 */
:root {
  --c-primary: #4f46e5;
  --c-primary-2: #6366f1;
  --c-primary-bg: #eef2ff;
  --c-text: #1f2937;
  --c-text-2: #6b7280;
  --c-text-3: #9ca3af;
  --c-border: #e5e7eb;
  --c-bg: #f3f4f6;
  --c-card: #ffffff;
  --c-success: #10b981;
  --c-warn: #f59e0b;
  --c-danger: #ef4444;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-lg: 0 10px 30px rgba(0,0,0,.12);
  --radius: 8px;
  --radius-lg: 12px;
  --sidebar-w: 220px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, sans-serif;
  font-size: 14px; line-height: 1.6; color: var(--c-text); background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}
button { font: inherit; color: inherit; cursor: pointer; background: none; border: none; }
input, select, textarea {
  font: inherit; color: inherit; background: #fff;
  border: 1px solid var(--c-border); border-radius: 6px; padding: 6px 10px;
  outline: none; transition: border-color .15s, box-shadow .15s;
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--c-primary-2); box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
textarea { resize: vertical; min-height: 60px; }
a { color: var(--c-primary); text-decoration: none; }

/* 布局 */
.app { display: flex; height: 100vh; overflow: hidden; }
.sidebar {
  width: var(--sidebar-w); background: var(--c-card);
  border-right: 1px solid var(--c-border); display: flex; flex-direction: column;
  flex-shrink: 0; transition: transform .25s;
}
.sidebar .brand {
  padding: 16px 16px; display: flex; align-items: center; gap: 10px;
  border-bottom: 1px solid var(--c-border);
}
.sidebar .brand .logo {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-2));
  color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 18px;
  box-shadow: 0 4px 10px rgba(79,70,229,.25);
}
.sidebar .brand .title { font-weight: 700; font-size: 15px; }
.sidebar .brand .sub { font-size: 11px; color: var(--c-text-3); }
.nav { flex: 1; overflow-y: auto; padding: 8px; }
.nav-group { margin-bottom: 6px; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 6px; color: var(--c-text-2);
  font-size: 13px; cursor: pointer; user-select: none; width: 100%;
  text-align: left; transition: background .15s, color .15s;
}
.nav-item:hover { background: var(--c-primary-bg); color: var(--c-primary); }
.nav-item.active {
  background: var(--c-primary); color: #fff; font-weight: 500;
  box-shadow: 0 2px 6px rgba(79,70,229,.25);
}
.nav-item .icon { width: 18px; text-align: center; flex-shrink: 0; }
.nav-item .label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-item .count {
  font-size: 11px; padding: 1px 6px; border-radius: 10px;
  background: rgba(0,0,0,.06); color: var(--c-text-3);
}
.nav-item.active .count { background: rgba(255,255,255,.2); color: #fff; }
.sidebar .foot {
  padding: 10px 14px; border-top: 1px solid var(--c-border);
  font-size: 11px; color: var(--c-text-3);
}

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  height: 56px; background: var(--c-card); border-bottom: 1px solid var(--c-border);
  display: flex; align-items: center; padding: 0 16px; gap: 12px; flex-shrink: 0;
}
.menu-toggle { display: none; }
.crumb {
  flex: 1; font-size: 15px; font-weight: 600; color: var(--c-text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.crumb .path { color: var(--c-text-3); font-weight: 400; margin-right: 8px; }
.top-actions { display: flex; gap: 8px; }

.content {
  flex: 1; overflow-y: auto; padding: 16px;
}

/* 通用 */
.btn {
  padding: 7px 14px; border-radius: 8px; background: #fff;
  border: 1px solid var(--c-border);
  transition: all .18s ease; font-size: 13px; font-weight: 500;
  display: inline-flex; align-items: center; gap: 6px;
  line-height: 1.4; white-space: nowrap;
  box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.btn:hover {
  border-color: var(--c-primary-2); color: var(--c-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(79,70,229,.12);
}
.btn:active { transform: translateY(0); box-shadow: none; }
.btn-primary {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-2));
  border-color: var(--c-primary); color: #fff;
  box-shadow: 0 2px 6px rgba(79,70,229,.28);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--c-primary-2), #818cf8);
  color: #fff; border-color: var(--c-primary-2);
  box-shadow: 0 4px 12px rgba(79,70,229,.35);
}
.btn-danger { color: var(--c-danger); border-color: #fecaca; background: #fff; }
.btn-danger:hover {
  background: var(--c-danger); color: #fff; border-color: var(--c-danger);
  box-shadow: 0 4px 10px rgba(239,68,68,.25);
}
.btn-ghost { background: transparent; border-color: transparent; box-shadow: none; }
.btn-ghost:hover { background: var(--c-primary-bg); border-color: transparent; transform: none; }
.btn-icon { padding: 7px 10px; border-radius: 8px; }
.btn-sm { padding: 4px 10px; font-size: 12px; border-radius: 6px; }
.btn-icon-only { padding: 6px 8px; }

/* 工具栏按钮组：主按钮 + 次按钮 + 危险按钮 视觉权重递减 */
.toolbar-group { display: inline-flex; gap: 6px; }
.toolbar-divider {
  width: 1px; height: 24px; background: var(--c-border); margin: 0 6px;
  align-self: center;
}

.card {
  background: var(--c-card); border-radius: var(--radius); box-shadow: var(--shadow-sm);
  border: 1px solid var(--c-border); padding: 16px;
}
.card-title {
  font-size: 14px; font-weight: 600; margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
}
.card-title .extra { margin-left: auto; font-size: 12px; font-weight: 400; color: var(--c-text-2); }

.grid { display: grid; gap: 12px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }

/* 仪表盘 */
.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat-card {
  background: var(--c-card); border-radius: var(--radius); padding: 16px;
  border: 1px solid var(--c-border); display: flex; align-items: center; gap: 14px;
  transition: transform .15s, box-shadow .15s;
}
.stat-card:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.stat-card .icon-box {
  width: 44px; height: 44px; border-radius: 10px;
  display: grid; place-items: center; font-size: 22px;
  background: var(--c-primary-bg); color: var(--c-primary);
}
.stat-card .icon-box.warn { background: #fffbeb; color: var(--c-warn); }
.stat-card .icon-box.danger { background: #fef2f2; color: var(--c-danger); }
.stat-card .icon-box.success { background: #ecfdf5; color: var(--c-success); }
.stat-card .info { flex: 1; min-width: 0; }
.stat-card .label { font-size: 12px; color: var(--c-text-2); }
.stat-card .value { font-size: 22px; font-weight: 700; color: var(--c-text); }
.stat-card .hint { font-size: 11px; color: var(--c-text-3); margin-top: 2px; }

.dash-row { display: grid; grid-template-columns: 1.5fr 1fr; gap: 12px; }
.dash-card { background: var(--c-card); border-radius: var(--radius); border: 1px solid var(--c-border); padding: 14px; }
.dash-card h3 {
  font-size: 13px; font-weight: 600; margin-bottom: 10px;
  display: flex; align-items: center; gap: 6px;
}
.dash-list { display: flex; flex-direction: column; gap: 6px; max-height: 320px; overflow-y: auto; }
.dash-list .row {
  display: flex; align-items: center; gap: 8px; padding: 6px 8px;
  border-radius: 6px; font-size: 13px; background: var(--c-bg);
}
.dash-list .row .tag {
  padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 500;
  background: var(--c-primary-bg); color: var(--c-primary); flex-shrink: 0;
}
.dash-list .row .tag.warn { background: #fffbeb; color: var(--c-warn); }
.dash-list .row .tag.danger { background: #fef2f2; color: var(--c-danger); }
.dash-list .row .tag.success { background: #ecfdf5; color: var(--c-success); }
.dash-list .row .text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dash-list .row .time { font-size: 11px; color: var(--c-text-3); flex-shrink: 0; }
.empty { color: var(--c-text-3); font-size: 12px; text-align: center; padding: 16px 0; }

/* 表格页 */
.table-toolbar {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; align-items: center;
}
.table-toolbar .search {
  position: relative; flex: 1; min-width: 180px; max-width: 320px;
}
.table-toolbar .search input { padding-left: 30px; }
.table-toolbar .search::before {
  content: "🔍"; position: absolute; left: 8px; top: 50%; transform: translateY(-50%);
  font-size: 12px; opacity: .5;
}
.table-toolbar .filter { min-width: 140px; }
.table-toolbar .spacer { flex: 1; }
.table-wrap {
  background: var(--c-card); border: 1px solid var(--c-border);
  border-radius: var(--radius); overflow: hidden;
}
.table-scroll { overflow-x: auto; max-height: 65vh; }
table.data { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data th, table.data td {
  padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--c-border);
  white-space: nowrap;
}
table.data th {
  background: var(--c-bg); font-weight: 600; color: var(--c-text-2);
  position: sticky; top: 0; z-index: 1; font-size: 12px;
  letter-spacing: .02em; text-transform: none;
  border-bottom: 1px solid var(--c-border);
}
table.data td { font-size: 13px; }
table.data td.wrap { white-space: normal; max-width: 260px; word-break: break-word; }
table.data tbody tr { transition: background .12s; }
table.data tbody tr:hover { background: var(--c-primary-bg); }
table.data tbody tr.selected { background: #dbeafe; box-shadow: inset 3px 0 0 var(--c-primary); }
table.data .checkbox-cell { width: 36px; padding: 10px 14px 10px 16px; text-align: center; }
table.data .checkbox-cell input { width: 16px; height: 16px; cursor: pointer; accent-color: var(--c-primary); }
table.data .op { width: 1%; white-space: nowrap; }
table.data .op .btn { padding: 3px 8px; font-size: 12px; margin-right: 4px; }
table.data .avatar {
  width: 28px; height: 28px; border-radius: 50%; display: inline-grid; place-items: center;
  background: var(--c-primary); color: #fff; font-size: 12px; font-weight: 600; margin-right: 6px;
  vertical-align: middle;
}
/* 批量操作浮动条 */
.batch-bar {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 14px; margin-bottom: 8px;
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border: 1px solid #bfdbfe; border-radius: 8px;
  animation: slideDown .2s ease-out;
}
@keyframes slideDown { from { transform: translateY(-6px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.batch-bar .info { font-size: 13px; color: var(--c-primary); font-weight: 500; }
.batch-bar .info strong { font-size: 15px; }
.batch-bar .spacer { flex: 1; }

.pagination {
  display: flex; align-items: center; gap: 8px; padding: 10px 12px;
  border-top: 1px solid var(--c-border); font-size: 13px;
}
.pagination .info { color: var(--c-text-2); margin-right: auto; }
.pagination button {
  padding: 4px 10px; border-radius: 4px; border: 1px solid var(--c-border);
  background: #fff;
}
.pagination button:disabled { opacity: .4; cursor: not-allowed; }
.pagination button.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* 成绩分析 */
.score-tabs { display: flex; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
.score-tab {
  padding: 6px 14px; border-radius: 6px; background: var(--c-card);
  border: 1px solid var(--c-border); font-size: 13px; cursor: pointer;
}
.score-tab.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.score-summary {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px; margin-bottom: 12px;
}
.score-summary .cell {
  background: var(--c-card); border: 1px solid var(--c-border); border-radius: 6px;
  padding: 10px 12px;
}
.score-summary .cell .k { font-size: 12px; color: var(--c-text-2); }
.score-summary .cell .v { font-size: 20px; font-weight: 700; color: var(--c-primary); margin-top: 2px; }
.score-summary .cell .v.small { font-size: 15px; }

/* 模态框 */
.modal-mask {
  position: fixed; inset: 0; background: rgba(17,24,39,.5); z-index: 100;
  display: none; place-items: center; padding: 20px;
  animation: fadein .15s;
}
.modal-mask.show { display: grid; }
@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }
.modal {
  background: var(--c-card); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
  width: 100%; max-width: 640px; max-height: 90vh; display: flex; flex-direction: column;
  animation: popin .18s ease-out;
}
@keyframes popin { from { transform: scale(.95); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal-head {
  padding: 14px 18px; border-bottom: 1px solid var(--c-border);
  display: flex; align-items: center;
}
.modal-head .title { font-weight: 600; flex: 1; }
.modal-head .close { font-size: 18px; color: var(--c-text-3); padding: 4px; }
.modal-body { padding: 16px 18px; overflow-y: auto; flex: 1; }
.modal-foot { padding: 12px 18px; border-top: 1px solid var(--c-border); display: flex; gap: 8px; justify-content: flex-end; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 12px; }
.form-grid .full { grid-column: 1 / -1; }
.form-grid label { display: block; }
.form-grid label .lbl { font-size: 12px; color: var(--c-text-2); margin-bottom: 4px; display: block; }
.form-grid label .required::before { content: "*"; color: var(--c-danger); margin-right: 2px; }

/* 面包屑分组 tab */
.sub-tabs {
  display: flex; gap: 4px; margin-bottom: 12px; overflow-x: auto;
  border-bottom: 1px solid var(--c-border); padding-bottom: 0;
}
.sub-tab {
  padding: 8px 14px; cursor: pointer; border-bottom: 2px solid transparent;
  color: var(--c-text-2); white-space: nowrap; font-size: 13px;
}
.sub-tab:hover { color: var(--c-primary); }
.sub-tab.active { color: var(--c-primary); border-color: var(--c-primary); font-weight: 600; }

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: rgba(17,24,39,.9); color: #fff; padding: 10px 18px;
  border-radius: 8px; font-size: 13px; box-shadow: var(--shadow-lg);
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s;
  z-index: 1000; max-width: 90vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(-4px); }

/* 移动端 */
.sidebar-mask {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 99;
}
.sidebar-mask.show { display: block; }

@media (max-width: 768px) {
  .sidebar { position: fixed; left: 0; top: 0; bottom: 0; z-index: 100; transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .menu-toggle { display: inline-flex; }
  .content { padding: 12px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .dash-row { grid-template-columns: 1fr; }
  .top-actions .btn { padding: 6px 10px; font-size: 12px; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .table-toolbar { gap: 6px; }
  .table-toolbar .search { max-width: none; }
}
@media (max-width: 480px) {
  .stats-row { grid-template-columns: 1fr 1fr; }
  .stat-card { padding: 12px; gap: 10px; }
  .stat-card .value { font-size: 18px; }
  .stat-card .icon-box { width: 36px; height: 36px; font-size: 18px; }
}