/* 学员信息管理系统 - 全局样式（响应式，兼容 PC 与手机） */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --sidebar-bg: #0f172a;
  --sidebar-text: #94a3b8;
  --sidebar-active: #2563eb;
  --bg: #f1f5f9;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
}

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

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

/* ---------- 布局 ---------- */
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 230px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; bottom: 0; left: 0;
  z-index: 100;
  transition: transform .25s ease;
}

.main {
  flex: 1;
  margin-left: 230px;
  padding: 20px 24px 40px;
  min-width: 0;
}

/* ---------- 侧边栏 ---------- */
.sidebar-header {
  padding: 20px 18px;
  display: flex; align-items: center; gap: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.sidebar-logo {
  width: 42px; height: 42px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 18px; flex-shrink: 0;
}
.sidebar-title { color: #fff; font-size: 15px; font-weight: 600; line-height: 1.3; }
.sidebar-title small { display: block; color: var(--sidebar-text); font-weight: 400; font-size: 11px; }

.nav { flex: 1; padding: 12px 10px; overflow-y: auto; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 14px; margin-bottom: 4px;
  border-radius: 8px; cursor: pointer; color: var(--sidebar-text);
  font-size: 14px; transition: all .15s; text-decoration: none;
  border: none; background: none; width: 100%; text-align: left;
}
.nav-item:hover { background: rgba(255,255,255,0.06); color: #e2e8f0; }
.nav-item.active { background: var(--sidebar-active); color: #fff; font-weight: 500; }
.nav-icon { width: 20px; text-align: center; font-size: 16px; }

.sidebar-footer { padding: 14px; border-top: 1px solid rgba(255,255,255,0.06); }
.user-info { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 14px; font-weight: 600; flex-shrink: 0;
}
.user-name { color: #e2e8f0; font-size: 13px; font-weight: 500; }
.user-role { color: var(--sidebar-text); font-size: 11px; }
.logout-btn {
  width: 100%; padding: 8px; border: 1px solid rgba(255,255,255,0.15);
  background: none; color: var(--sidebar-text); border-radius: 8px;
  cursor: pointer; font-size: 13px; transition: all .15s;
}
.logout-btn:hover { color: #fff; border-color: rgba(255,255,255,0.35); }

/* 移动端遮罩 */
.mask {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.45);
  z-index: 90;
}
.hamburger {
  display: none; position: fixed; top: 14px; left: 14px; z-index: 110;
  width: 40px; height: 40px; border-radius: 10px; border: none;
  background: var(--primary); color: #fff; font-size: 18px; cursor: pointer;
  box-shadow: var(--shadow);
}

/* ---------- 顶部栏 ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px; flex-wrap: wrap; gap: 10px;
}
.topbar h2 { font-size: 20px; font-weight: 700; }
.page-subtitle { color: var(--text-light); font-size: 13px; }

/* ---------- 卡片 & 统计 ---------- */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}
.card-title { font-size: 16px; font-weight: 600; margin-bottom: 16px; display: flex; align-items: center; justify-content: space-between; }

.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px; margin-bottom: 20px;
}
.stat-card {
  background: var(--card-bg); border-radius: var(--radius); padding: 18px;
  box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.stat-card::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
}
.stat-card.blue::after { background: var(--primary); }
.stat-card.green::after { background: var(--success); }
.stat-card.purple::after { background: #8b5cf6; }
.stat-card.orange::after { background: var(--warning); }
.stat-card.teal::after { background: #0d9488; }
.stat-card.pink::after { background: #ec4899; }
.stat-label { color: var(--text-light); font-size: 12px; margin-bottom: 6px; }
.stat-value { font-size: 28px; font-weight: 700; }
.stat-value .unit { font-size: 13px; color: var(--text-light); font-weight: 400; margin-left: 3px; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 640px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { background: #f8fafc; color: var(--text-light); font-weight: 600; font-size: 12px; }
tr:hover td { background: #f8fafc; }
tbody tr { transition: background .15s; }
td .badge { display: inline-block; padding: 2px 8px; border-radius: 20px; font-size: 12px; }
.badge-pass { background: #dcfce7; color: #166534; }
.badge-fail { background: #fee2e2; color: #991b1b; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-primary { background: var(--primary-light); color: var(--primary-dark); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 8px; border: none;
  font-size: 13px; font-weight: 500; cursor: pointer; transition: all .15s;
  text-decoration: none; background: var(--primary); color: #fff;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: scale(0.97); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-outline { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.btn-danger { background: var(--danger); }
.btn-danger-outline { background: #fff; color: var(--danger); border: 1px solid #fecaca; }
.btn-danger-outline:hover { background: #fee2e2; }
.btn-success { background: var(--success); }
.btn-ghost { background: none; color: var(--text-light); }
.btn-ghost:hover { color: var(--text); background: var(--bg); }
.btn-sm-icon { padding: 4px 8px; font-size: 12px; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.form-item { display: flex; flex-direction: column; gap: 5px; }
.form-item label { font-size: 13px; color: var(--text-light); }
.form-item input, .form-item select, .form-item textarea {
  padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; outline: none; transition: all .15s; background: #fff; font-family: inherit;
}
.form-item input:focus, .form-item select:focus, .form-item textarea:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 16px; }

/* ---------- 筛选工具栏 ---------- */
.toolbar {
  display: flex; gap: 10px; flex-wrap: wrap; align-items: center;
  margin-bottom: 16px; padding: 14px; background: var(--card-bg);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.toolbar input, .toolbar select {
  padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; outline: none;
}
.toolbar input:focus, .toolbar select:focus { border-color: var(--primary); }
.toolbar input[type="text"], .toolbar input[type="search"] { min-width: 200px; flex: 1; max-width: 320px; }

/* ---------- 分页 ---------- */
.pagination { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 16px; flex-wrap: wrap; }
.pagination .info { color: var(--text-light); font-size: 13px; }
.page-btns { display: flex; gap: 6px; }
.page-btn {
  min-width: 34px; height: 34px; padding: 0 8px; border-radius: 8px;
  border: 1px solid var(--border); background: #fff; cursor: pointer; font-size: 13px; color: var(--text);
  display: flex; align-items: center; justify-content: center;
}
.page-btn:hover:not(:disabled) { border-color: var(--primary); color: var(--primary); }
.page-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ---------- 弹窗 ---------- */
.modal-mask {
  display: none; position: fixed; inset: 0; background: rgba(15,23,42,0.5);
  z-index: 200; align-items: flex-start; justify-content: center; padding: 30px 16px;
  overflow-y: auto;
}
.modal-mask.show { display: flex; }
.modal {
  background: #fff; border-radius: 16px; width: 100%; max-width: 560px;
  padding: 24px; box-shadow: 0 20px 60px rgba(0,0,0,0.25);
  animation: modalIn .2s ease;
}
@keyframes modalIn { from { transform: translateY(16px); opacity: 0; } to { transform: none; opacity: 1; } }
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.modal-header h3 { font-size: 17px; }
.modal-close { background: none; border: none; font-size: 20px; color: var(--text-light); cursor: pointer; padding: 4px; }
.modal-close:hover { color: var(--text); }
.modal-lg { max-width: 900px; }

/* ---------- 图表容器 ---------- */
.chart-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.chart-box { background: var(--card-bg); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.chart-box h4 { font-size: 14px; margin-bottom: 12px; color: var(--text); }
.chart-canvas { position: relative; height: 260px; }
.chart-canvas.chart-lg { height: 320px; }
.section-title { font-size: 15px; font-weight: 600; color: var(--primary); margin: 24px 0 10px; padding-bottom: 6px; border-bottom: 2px solid var(--primary-light, #dbeafe); }
/* 热力图 */
.heatmap-wrap { overflow-x: auto; }
.heatmap-table { border-collapse: collapse; font-size: 12px; width: 100%; }
.heatmap-table th, .heatmap-table td { border: 1px solid #e5e7eb; padding: 6px 8px; text-align: center; min-width: 64px; }
.heatmap-table th { background: #f3f4f6; font-weight: 600; position: sticky; top: 0; }
.heatmap-table .hm-cell { color: #fff; font-weight: 600; border-radius: 2px; }
.heatmap-table .hm-empty { background: #f9fafb; color: #9ca3af; }
.heatmap-legend { display: flex; align-items: center; gap: 8px; font-size: 11px; color: var(--text-2); margin-top: 8px; flex-wrap: wrap; }
.heatmap-legend .hm-block { width: 16px; height: 16px; border-radius: 2px; display: inline-block; }
/* 雷达图选择器 */
.radar-toolbar { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }

/* ---------- 空状态 ---------- */
.empty { text-align: center; color: var(--text-light); padding: 40px 0; }
.empty .icon { font-size: 40px; margin-bottom: 10px; }

/* ---------- Toast 提示 ---------- */
#toast {
  position: fixed; top: 20px; left: 50%; transform: translateX(-50%);
  background: #0f172a; color: #fff; padding: 10px 20px; border-radius: 10px;
  font-size: 13px; z-index: 300; opacity: 0; pointer-events: none; transition: all .25s;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2); max-width: 90vw;
}
#toast.show { opacity: 1; top: 30px; }
#toast.success { background: var(--success); }
#toast.error { background: var(--danger); }

/* ---------- 详情视图 ---------- */
.detail-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.detail-item { background: #f8fafc; border-radius: 8px; padding: 10px 14px; }
.detail-item .k { color: var(--text-light); font-size: 12px; margin-bottom: 2px; }
.detail-item .v { font-size: 14px; font-weight: 500; word-break: break-all; }

/* ---------- 文件上传 ---------- */
.upload-zone {
  border: 2px dashed var(--border); border-radius: var(--radius); padding: 24px;
  text-align: center; cursor: pointer; transition: all .2s; margin-bottom: 14px;
}
.upload-zone:hover, .upload-zone.dragover { border-color: var(--primary); background: var(--primary-light); }
.upload-zone .icon { font-size: 32px; margin-bottom: 8px; }
.upload-zone p { color: var(--text-light); font-size: 13px; }
.upload-zone .main-text { color: var(--text); font-size: 14px; font-weight: 500; }

/* ---------- 移动端适配 ---------- */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .mask.show { display: block; }
  .hamburger { display: flex; align-items: center; justify-content: center; }
  .main { margin-left: 0; padding: 66px 14px 30px; }
  .topbar h2 { font-size: 17px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .stat-value { font-size: 22px; }
  .form-grid { grid-template-columns: 1fr; }
  .toolbar input[type="search"], .toolbar input[type="text"] { min-width: 100%; max-width: none; flex: auto; }
  .card { padding: 15px; }
  th, td { padding: 8px 10px; font-size: 13px; }
  .chart-grid { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .pagination { flex-direction: column; align-items: flex-start; }
}