/**
 * admin.css —— 教师端管理页通用布局（左侧菜单 + 内容区）
 *
 * 所有管理页（成绩/学生/设置）共用这套骨架，与赛道页保持一致的视觉语言，
 * 但内容是「数据展示风格」，不是游戏风格。
 */
:root {
  --admin-sidebar: 200px;
  --admin-bg: #f5f7f5;
  --admin-card: #ffffff;
  --admin-line: #dce4de;
  --admin-text: #243b32;
  --admin-dim: #708078;
  --admin-dim2: #839088;
  --admin-blue: #28725b;
  --admin-green: #16a34a;
  --admin-gold: #f59e0b;
  --admin-red: #dc2626;
}

body.admin {
  background: var(--admin-bg);
  color: var(--admin-text);
  overflow: auto;
  font-family: var(--sans);
}

/* Shared navigation is rendered by teacher-shell.js. */
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--admin-sidebar);
  background: #fff;
  border-right: 1px solid var(--admin-line);
  display: flex;
  flex-direction: column;
  z-index: 100;
}
.sidebar .logo {
  padding: 28px 20px 30px;
}
.sidebar .logo .t {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 15px;
  font-weight: 700;
}
.logo-mark {
  display: grid;
  place-items: center;
  width: 29px;
  height: 29px;
  background: #28725b;
  color: #fff;
  border-radius: 8px;
  font: 700 13px var(--mono);
}
.sidebar .logo .s {
  color: var(--admin-dim);
  font-size: 10px;
  letter-spacing: 1.8px;
  padding: 8px 0 0 38px;
}
.nav-label {
  color: #98a59c;
  font-size: 10px;
  letter-spacing: 2px;
  padding: 0 23px 10px;
}
.sidebar .nav {
  padding: 0 12px;
  flex: 1;
}
.sidebar .nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  margin-bottom: 5px;
  border-radius: 8px;
  color: #728078;
  font-size: 13px;
}
.sidebar .nav a:hover {
  background: #f4f7f4;
  color: #28725b;
}
.sidebar .nav a.active {
  background: #eaf2ed;
  color: #28725b;
  font-weight: 600;
}
.sidebar .ic {
  width: 18px;
  height: 18px;
  display: inline-flex;
}
.sidebar .ic svg {
  width: 18px;
  height: 18px;
}
.sidebar .foot {
  padding: 20px 23px;
  font-size: 11px;
  color: var(--admin-dim);
  border-top: 1px solid var(--admin-line);
}
.sidebar .foot a {
  display: block;
  margin-top: 10px;
  color: var(--admin-dim);
}
.sidebar .foot strong {
  display: block;
  font-weight: 500;
  color: var(--admin-text);
}

/* 内容区 */
.admin .content {
  margin-left: var(--admin-sidebar);
  padding: 24px 28px 40px;
  min-height: 100vh;
}
.admin .page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 14px;
  flex-wrap: wrap;
}
.admin .page-head h1 {
  font-size: 21px;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 9px;
}
.admin .page-head .sub {
  font-size: 12.5px;
  color: var(--admin-dim);
  margin-top: 4px;
}

.admin .card2 {
  background: var(--admin-card);
  border: 1px solid var(--admin-line);
  border-radius: 13px;
  box-shadow: 0 2px 12px rgba(30, 70, 120, 0.05);
}

/* 汇总卡片 */
.admin .sum-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}
.admin .sum-card {
  padding: 16px 17px;
}
.admin .sum-card .v {
  font-size: 25px;
  font-weight: 800;
  font-family: var(--mono);
  line-height: 1.15;
  color: var(--admin-text);
}
.admin .sum-card .k {
  font-size: 11px;
  color: var(--admin-dim);
  margin-top: 5px;
}
.admin .sum-card .d {
  font-size: 10.5px;
  color: var(--admin-dim2);
  margin-top: 2px;
}

/* 表格 */
.admin .table-wrap {
  overflow-x: auto;
  border-radius: 13px;
}
.admin table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.admin thead th {
  text-align: left;
  padding: 12px 14px;
  font-size: 10.5px;
  color: var(--admin-dim);
  letter-spacing: 1.2px;
  font-weight: 700;
  background: #f7fafd;
  white-space: nowrap;
  border-bottom: 1px solid var(--admin-line);
  position: sticky;
  top: 0;
}
.admin tbody td {
  padding: 11px 14px;
  border-bottom: 1px solid #f0f4f9;
  white-space: nowrap;
}
.admin tbody tr {
  transition: background 0.14s;
}
.admin tbody tr:hover {
  background: #f7fbff;
}
.admin tbody tr:last-child td {
  border-bottom: none;
}

.admin .rank-no {
  font-family: var(--mono);
  font-weight: 800;
  font-size: 13.5px;
  color: var(--admin-dim);
}
.admin .rank-no.g1 {
  color: var(--admin-gold);
}
.admin .rank-no.g2 {
  color: #64748b;
}
.admin .rank-no.g3 {
  color: #b45309;
}

.admin .who-cell {
  display: flex;
  align-items: center;
  gap: 9px;
}
.admin .ava {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 800;
  color: #fff;
}

.admin .mini-bar {
  flex: 1;
  height: 6px;
  background: #e8eef6;
  border-radius: 3px;
  overflow: hidden;
  min-width: 80px;
}
.admin .mini-bar i {
  display: block;
  height: 100%;
  background: var(--admin-blue);
  border-radius: 3px;
}
.admin .bar-cell {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 130px;
}
.admin .bar-txt {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--admin-dim);
}

.admin .tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 5px;
  font-size: 10.5px;
  font-weight: 700;
}
.admin .tag.done {
  background: #dcfce7;
  color: #15803d;
}
.admin .tag.run {
  background: #dbeafe;
  color: #1d4ed8;
}
.admin .tag.off {
  background: #eef2f7;
  color: #94a3b8;
}
.admin .tag.lock {
  background: #fef3c7;
  color: #b45309;
}

/* 按钮 */
.admin .btn {
  color: #1e3a5f;
  background: #fff;
  border: 1px solid var(--admin-line);
}
.admin .btn:hover:not(:disabled) {
  background: #f4f8fc;
  border-color: #b9cde3;
}
.admin .btn.primary {
  background: #28725b;
  border-color: #28725b;
  color: #fff;
}
.admin .btn.danger {
  background: #fff;
  border-color: #f3c3c3;
  color: #dc2626;
}
.admin .btn.danger:hover:not(:disabled) {
  background: #fff5f5;
}

/* 表单 */
.admin .field {
  margin-bottom: 14px;
}
.admin .label {
  display: block;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--admin-dim);
  margin-bottom: 7px;
}
.admin .input {
  width: 100%;
  padding: 11px 14px;
  font-size: 14px;
  color: var(--admin-text);
  background: #fff;
  border: 1.5px solid var(--admin-line);
  border-radius: 9px;
  outline: none;
  font-family: inherit;
  transition:
    border-color 0.16s,
    box-shadow 0.16s;
}
.admin .input:focus {
  border-color: var(--admin-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
}

.admin .form-card {
  padding: 20px 22px;
  margin-bottom: 15px;
}
.admin .form-card h2 {
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  gap: 7px;
}
.admin .form-card .desc {
  font-size: 12px;
  color: var(--admin-dim);
  line-height: 1.65;
  margin-bottom: 15px;
}
.admin .form-row {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  flex-wrap: wrap;
}
.admin .form-row .field {
  flex: 1;
  min-width: 170px;
  margin-bottom: 0;
}

.admin .switch {
  position: relative;
  width: 44px;
  height: 25px;
  background: #dbe4ee;
  border-radius: 13px;
  cursor: pointer;
  transition: background 0.2s;
  flex: 0 0 44px;
}
.admin .switch::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: #fff;
  transition: all 0.2s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}
.admin .switch.on {
  background: #34d399;
}
.admin .switch.on::after {
  left: 22px;
}
.admin .switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
}
.admin .switch-row .t {
  font-size: 13.5px;
  font-weight: 600;
}
.admin .switch-row .d {
  font-size: 11.5px;
  color: var(--admin-dim2);
  margin-top: 3px;
}

/* 阶段进度条（学生管理页用） */
.admin .stage-dots {
  display: inline-flex;
  gap: 3px;
  align-items: center;
}
.admin .stage-dots i {
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: #dbe4ee;
  display: block;
}
.admin .stage-dots i.on {
  background: var(--admin-green);
}
.admin .stage-dots i.cur {
  background: var(--admin-blue);
}

.admin .empty {
  text-align: center;
  padding: 56px 20px;
  color: var(--admin-dim2);
  font-size: 13.5px;
  line-height: 1.9;
}

@media (max-width: 1050px) {
  :root {
    --admin-sidebar: 68px;
  }
  .sidebar .logo {
    padding: 24px 19px;
  }
  .sidebar .logo .t span:last-child,
  .sidebar .logo .s,
  .nav-label,
  .sidebar .nav a span:last-child,
  .sidebar .foot {
    display: none;
  }
  .sidebar .nav {
    padding: 0 9px;
  }
  .sidebar .nav a {
    justify-content: center;
    padding: 14px 0;
  }
  .admin .content {
    padding: 22px 18px;
  }
}
.bulk-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  padding: 14px;
  border-bottom: 1px solid var(--admin-line);
}
.bulk-bar .input {
  max-width: 220px;
  padding: 8px 12px;
}
.bulk-bar .muted {
  margin-left: auto;
  font-size: 12px;
}
input[type='checkbox'] {
  accent-color: #28725b;
  width: 15px;
  height: 15px;
  cursor: pointer;
}