/* static/style.css —— 码力全开·学生管理系统 前端样式
   设计约定：浅色主题、扁平化、0.5px 细边框、无渐变无阴影堆叠 */

:root {
  --c-bg: #f4f5f7;
  --c-panel: #ffffff;
  --c-panel-2: #fafbfc;
  --c-border: #e4e6ea;
  --c-border-strong: #cfd3da;
  --c-text: #1f2329;
  --c-text-2: #61666d;
  --c-text-3: #9096a0;

  --c-primary: #185fa5;
  --c-primary-hover: #0c447c;
  --c-primary-weak: #e6f1fb;

  --c-success: #3b6d11;
  --c-success-weak: #eaf3de;
  --c-warn: #854f0b;
  --c-warn-weak: #faeeda;
  --c-danger: #a32d2d;
  --c-danger-weak: #fcebeb;

  --radius: 8px;
  --radius-lg: 12px;
  --sidebar-w: 196px;
  --assistant-w: 330px;
}

* { box-sizing: border-box; }

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
}

button, input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
a { color: var(--c-primary); text-decoration: none; }

/* ---------- 整体布局：侧栏 + 主区 + 助手栏 ---------- */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--assistant-w);
  height: 100vh;
  overflow: hidden;
}
.layout.assistant-hidden { grid-template-columns: var(--sidebar-w) minmax(0, 1fr) 0; }

/* ---------- 左侧导航 ---------- */
.sidebar {
  background: var(--c-panel);
  border-right: 0.5px solid var(--c-border);
  padding: 14px 10px;
  overflow-y: auto;
}
.brand {
  font-size: 14px;
  font-weight: 600;
  padding: 2px 8px 14px;
  letter-spacing: .2px;
}
.brand small { display: block; font-weight: 400; font-size: 11px; color: var(--c-text-3); letter-spacing: 0; }
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav-group {
  font-size: 11px;
  color: var(--c-text-3);
  padding: 12px 8px 4px;
}
.nav-item {
  border: 0;
  background: transparent;
  text-align: left;
  padding: 7px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--c-text-2);
  font-size: 13px;
  transition: background .12s;
}
.nav-item:hover { background: var(--c-panel-2); }
.nav-item.active { background: var(--c-primary-weak); color: #0c447c; font-weight: 500; }
.nav-item .dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-border-strong);
  margin-right: 8px;
  vertical-align: middle;
}
.nav-item.active .dot { background: var(--c-primary); }

/* ---------- 主区 ---------- */
.main { overflow-y: auto; padding: 16px 20px 40px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.topbar h1 { font-size: 18px; font-weight: 600; margin: 0; }
.topbar .sub { font-size: 12px; color: var(--c-text-3); font-weight: 400; margin-left: 8px; }
.topbar-actions { display: flex; gap: 8px; align-items: center; }

/* ---------- 按钮 ---------- */
.btn {
  border: 0.5px solid var(--c-border-strong);
  background: var(--c-panel);
  border-radius: var(--radius);
  padding: 6px 12px;
  cursor: pointer;
  font-size: 13px;
  color: var(--c-text);
  white-space: nowrap;
  transition: background .12s, border-color .12s;
}
.btn:hover { background: var(--c-panel-2); border-color: var(--c-text-3); }
.btn-primary { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-hover); border-color: var(--c-primary-hover); }
.btn-danger { color: var(--c-danger); border-color: #e8b8b8; }
.btn-danger:hover { background: var(--c-danger-weak); }
.btn-sm { padding: 3px 8px; font-size: 12px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

.link-btn {
  border: 0; background: none; padding: 0 6px 0 0;
  color: var(--c-primary); cursor: pointer; font-size: 12px;
}
.link-btn:hover { text-decoration: underline; }
.link-btn.danger { color: var(--c-danger); }

/* ---------- 筛选栏 ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: flex-end;
  background: var(--c-panel);
  border: 0.5px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 12px;
  margin-bottom: 12px;
}
.field { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.field label { font-size: 11px; color: var(--c-text-3); }
.field input, .field select {
  border: 0.5px solid var(--c-border-strong);
  border-radius: var(--radius);
  padding: 6px 9px;
  background: var(--c-panel);
  min-width: 130px;
  outline: none;
}
.field input:focus, .field select:focus { border-color: var(--c-primary); }
.field.grow { flex: 1; }
.field.grow input { width: 100%; }

/* ---------- KPI 卡片 ---------- */
.kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}
.kpi {
  background: var(--c-panel);
  border: 0.5px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 12px 14px;
}
.kpi .kpi-label { font-size: 12px; color: var(--c-text-2); }
.kpi .kpi-value { font-size: 24px; font-weight: 600; line-height: 1.3; }
.kpi .kpi-extra { font-size: 11px; color: var(--c-text-3); }
.kpi.accent { background: var(--c-primary-weak); border-color: #c9dff7; }
.kpi.accent .kpi-value { color: #0c447c; }

/* ---------- 卡片 / 表格 ---------- */
.card {
  background: var(--c-panel);
  border: 0.5px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  margin-bottom: 14px;
}
.card-title {
  font-size: 13px;
  font-weight: 600;
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-title .hint { font-weight: 400; font-size: 11px; color: var(--c-text-3); }

.table-wrap { overflow-x: auto; border: 0.5px solid var(--c-border); border-radius: var(--radius); }
table.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data-table th {
  background: var(--c-panel-2);
  text-align: left;
  font-weight: 600;
  color: var(--c-text-2);
  font-size: 12px;
  padding: 8px 10px;
  white-space: nowrap;
  border-bottom: 0.5px solid var(--c-border);
}
table.data-table td {
  padding: 8px 10px;
  border-bottom: 0.5px solid var(--c-border);
  white-space: nowrap;
}
table.data-table tbody tr:last-child td { border-bottom: 0; }
table.data-table tbody tr:hover { background: #fbfcfd; }
table.data-table .mono { font-family: ui-monospace, Consolas, monospace; font-size: 12px; }
table.data-table .muted { color: var(--c-text-3); }
table.data-table .actions { white-space: nowrap; }
table.data-table .actions .sep { color: var(--c-border-strong); padding: 0 4px; }

.tag {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 999px;
  font-size: 11px;
  background: var(--c-panel-2);
  border: 0.5px solid var(--c-border);
  color: var(--c-text-2);
}
.tag.ok { background: var(--c-success-weak); border-color: #cde0ab; color: var(--c-success); }
.tag.warn { background: var(--c-warn-weak); border-color: #f0d9a8; color: var(--c-warn); }
.tag.bad { background: var(--c-danger-weak); border-color: #f0c2c2; color: var(--c-danger); }
.tag.info { background: var(--c-primary-weak); border-color: #c9dff7; color: #0c447c; }

.pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 10px;
  font-size: 12px;
  color: var(--c-text-2);
}
.pager .pages { display: flex; gap: 6px; align-items: center; }

.empty { padding: 28px; text-align: center; color: var(--c-text-3); font-size: 13px; }
.loading { padding: 28px; text-align: center; color: var(--c-text-3); font-size: 13px; }

/* ---------- 图表 ---------- */
.chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
}
.chart-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  margin-bottom: 6px;
}
.chart-row .name { width: 74px; color: var(--c-text-2); text-align: right; flex: none; }
.chart-row .bar-wrap { flex: 1; background: var(--c-panel-2); border-radius: 4px; height: 16px; overflow: hidden; }
.chart-row .bar { height: 100%; background: var(--c-primary); border-radius: 4px; }
.chart-row .val { width: 60px; text-align: right; color: var(--c-text-2); flex: none; }

/* ---------- 弹窗 / 抽屉 ---------- */
.mask {
  position: fixed;
  inset: 0;
  background: rgba(31, 35, 41, .38);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
.mask.right { justify-content: flex-end; padding: 0; }
.modal {
  background: var(--c-panel);
  border-radius: var(--radius-lg);
  width: min(560px, 100%);
  max-height: 86vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.modal-head {
  padding: 14px 18px;
  border-bottom: 0.5px solid var(--c-border);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-body { padding: 16px 18px; overflow-y: auto; }
.modal-foot {
  padding: 12px 18px;
  border-top: 0.5px solid var(--c-border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-grid .full { grid-column: 1 / -1; }
.form-grid .field input, .form-grid .field select { width: 100%; min-width: 0; }
.form-err {
  grid-column: 1 / -1;
  background: var(--c-danger-weak);
  color: var(--c-danger);
  border-radius: var(--radius);
  padding: 8px 10px;
  font-size: 12px;
}

.drawer {
  background: var(--c-panel);
  width: min(520px, 100%);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.detail-list { display: grid; grid-template-columns: 96px 1fr; gap: 6px 12px; font-size: 13px; }
.detail-list dt { color: var(--c-text-3); }
.detail-list dd { margin: 0; word-break: break-all; }
.detail-section { margin-top: 18px; }
.detail-section h4 { font-size: 13px; font-weight: 600; margin: 0 0 8px; }

/* ---------- 轻提示 ---------- */
.toasts {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 200;
  align-items: center;
}
.toast {
  background: #2c2c2a;
  color: #fff;
  border-radius: var(--radius);
  padding: 8px 16px;
  font-size: 13px;
  max-width: 460px;
}
.toast.ok { background: var(--c-success); }
.toast.err { background: var(--c-danger); }

/* ---------- 右侧查询助手 ---------- */
.assistant {
  background: var(--c-panel);
  border-left: 0.5px solid var(--c-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}
.assistant-head {
  padding: 14px 14px 10px;
  border-bottom: 0.5px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.assistant-head h2 { font-size: 14px; font-weight: 600; margin: 0; }
.assistant-head .sub { font-size: 11px; color: var(--c-text-3); }
.assistant-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.msg { max-width: 100%; font-size: 13px; border-radius: var(--radius); padding: 8px 11px; line-height: 1.65; }
.msg.user { background: var(--c-primary-weak); color: #0c447c; align-self: flex-end; max-width: 85%; }
.msg.bot { background: var(--c-panel-2); border: 0.5px solid var(--c-border); align-self: flex-start; }
.msg.bot .ans-num { font-weight: 600; color: #0c447c; font-size: 16px; }
.msg.bot .rows { margin: 6px 0 0; padding: 0; list-style: none; }
.msg.bot .rows li {
  font-size: 12px;
  padding: 3px 0;
  border-top: 0.5px dashed var(--c-border);
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.msg.bot .rows li:first-child { border-top: 0; }
.msg .jump {
  display: inline-block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--c-primary);
  cursor: pointer;
}
.msg .jump:hover { text-decoration: underline; }
.msg .tip { color: var(--c-text-3); font-size: 12px; }
.msg .kv { font-size: 12px; color: var(--c-text-2); }

.suggests { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.suggest {
  border: 0.5px solid var(--c-border-strong);
  background: var(--c-panel);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  cursor: pointer;
  color: var(--c-text-2);
}
.suggest:hover { border-color: var(--c-primary); color: var(--c-primary); }

.assistant-foot { padding: 10px 14px 14px; border-top: 0.5px solid var(--c-border); }
.assistant-foot form { display: flex; gap: 8px; }
.assistant-foot input {
  flex: 1;
  border: 0.5px solid var(--c-border-strong);
  border-radius: var(--radius);
  padding: 8px 11px;
  min-width: 0;
  outline: none;
}
.assistant-foot input:focus { border-color: var(--c-primary); }

/* ---------- 窄屏适配 ---------- */
@media (max-width: 1100px) {
  .layout { grid-template-columns: var(--sidebar-w) minmax(0, 1fr) 0; }
  .layout.assistant-open { grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--assistant-w); }
  .assistant { display: none; }
  .layout.assistant-open .assistant { display: flex; }
}
@media (max-width: 760px) {
  .layout, .layout.assistant-open { grid-template-columns: 0 minmax(0, 1fr) 0; }
  .sidebar { display: none; }
  .form-grid { grid-template-columns: 1fr; }
}