/* 沃林学生管理系统 —— 主题样式
   浅色后台风：白卡片 + 柔和阴影 + 靛蓝主色 */

:root {
  /* 覆盖 Element Plus 的主色，让组件库跟着一起变 */
  --el-color-primary: #4F46E5;
  --el-color-primary-light-3: #7C74EC;
  --el-color-primary-light-5: #A5A0F2;
  --el-color-primary-light-7: #CECBF7;
  --el-color-primary-light-8: #E2E0FA;
  --el-color-primary-light-9: #F1F0FD;
  --el-color-primary-dark-2: #4038B8;

  --brand: #4F46E5;
  --brand-dark: #4038B8;
  --bg: #F8FAFC;
  --ink: #0F172A;
  --ink-2: #475569;
  --muted: #64748B;
  --line: #E2E8F0;
  --card-shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px -12px rgba(15, 23, 42, .12);
  --radius: 10px;
  --sidebar-w: 224px;
}

* { box-sizing: border-box; }

html, body, #app { height: 100%; margin: 0; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

.boot-fallback {
  display: flex; align-items: center; justify-content: center;
  height: 100%; color: var(--muted); font-size: 15px;
}

/* ---------- 整体布局 ---------- */
.layout { display: flex; height: 100%; overflow: hidden; }

.sidebar {
  width: var(--sidebar-w); flex: 0 0 var(--sidebar-w);
  background: #fff; border-right: 1px solid var(--line);
  display: flex; flex-direction: column;
}

.brand {
  display: flex; align-items: center; gap: 10px;
  padding: 18px 18px 16px; border-bottom: 1px solid var(--line);
}
.brand-mark {
  width: 34px; height: 34px; flex: 0 0 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--brand), #7C74EC);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 16px; letter-spacing: .5px;
}
.brand-text { line-height: 1.25; }
.brand-title { font-size: 15px; font-weight: 650; letter-spacing: .2px; }
.brand-sub { font-size: 11px; color: var(--muted); }

.nav { padding: 12px 10px; overflow-y: auto; flex: 1; }
.nav-group { font-size: 11px; color: var(--muted); letter-spacing: .1em;
  padding: 12px 10px 6px; text-transform: uppercase; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px; margin-bottom: 2px; border-radius: 8px;
  color: var(--ink-2); cursor: pointer; user-select: none;
  position: relative; transition: background .15s, color .15s;
}
.nav-item:hover { background: #F1F5F9; color: var(--ink); }
.nav-item.active { background: var(--el-color-primary-light-9); color: var(--brand); font-weight: 600; }
.nav-item.active::before {
  content: ''; position: absolute; left: -10px; top: 7px; bottom: 7px;
  width: 3px; border-radius: 0 3px 3px 0; background: var(--brand);
}
.nav-item svg { flex: 0 0 18px; }

.sidebar-foot {
  padding: 12px 16px; border-top: 1px solid var(--line);
  font-size: 11px; color: var(--muted); line-height: 1.6;
}

/* ---------- 右侧主区 ---------- */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }

.topbar {
  height: 60px; flex: 0 0 60px; background: #fff;
  border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 22px;
}
.topbar-title { font-size: 17px; font-weight: 650; }
.topbar-sub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }

.content { flex: 1; overflow-y: auto; padding: 20px 22px 32px; }

/* ---------- 卡片 / 工具栏 ---------- */
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--card-shadow); padding: 18px; }
.card + .card { margin-top: 16px; }

.card-head { display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.card-title { font-size: 15px; font-weight: 650; }
.card-hint { font-size: 12px; color: var(--muted); margin-top: 2px; font-weight: 400; }
.card-tools { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.filters { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }

.mt12 { margin-top: 12px; }
.muted { color: var(--muted); }
.text-right { text-align: right; }

/* ---------- KPI ---------- */
.kpi-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-bottom: 16px; }
@media (max-width: 1100px) { .kpi-row { grid-template-columns: repeat(2, 1fr); } }
.kpi { background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--card-shadow); padding: 16px 18px; position: relative; overflow: hidden; }
.kpi::after { content: ''; position: absolute; inset: 0 auto 0 0; width: 3px; background: var(--brand); opacity: .8; }
.kpi-label { font-size: 12px; color: var(--muted); }
.kpi-value { font-size: 26px; font-weight: 700; letter-spacing: -.5px; margin-top: 6px;
  font-variant-numeric: tabular-nums; }
.kpi-unit { font-size: 12px; color: var(--muted); font-weight: 500; margin-left: 4px; }

/* ---------- 图表 ---------- */
.chart-card { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 16px; align-items: start; }
@media (max-width: 1280px) { .chart-card { grid-template-columns: 1fr; } }
.chart-box { height: 300px; width: 100%; }
.chart-box.tall { height: 360px; }

.empty-state { height: 300px; display: flex; align-items: center; justify-content: center; }

/* ---------- 表格微调 ---------- */
.el-table th.el-table__cell { background: #F8FAFC !important; color: var(--ink-2); font-weight: 600; }
.el-table { --el-table-border-color: var(--line); }
.el-table .cell { line-height: 1.5; }

.pager { display: flex; justify-content: flex-end; margin-top: 14px; }

.score-detail { padding: 4px 0 4px 48px; }
.score-detail .tag-list { display: flex; gap: 8px; flex-wrap: wrap; }

/* 弹窗里的表单紧凑一点 */
.el-dialog__body .el-form-item:last-child { margin-bottom: 0; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.form-grid .span2 { grid-column: 1 / -1; }