/* campus-auth shared design tokens — three themes via data-theme */
:root,
[data-theme="tech-blue"] {
  --brand: #1664ff;
  --brand-btn: #1664ff;
  --on-brand: #ffffff;
  --scrim: rgba(0, 0, 0, 0.35);
  --brand-soft: rgba(22, 100, 255, 0.12);
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1d2129;
  --muted: #86909c;
  --border: #e5e6eb;
  --sidebar: #0b1f44;
  --sidebar-text: #e8f0ff;
  --danger: #f53f3f;
  --ok: #00b42a;
  --radius: 10px;
  --shadow: 0 8px 24px rgba(15, 35, 80, 0.08);
  --brand-hover: #3c7cff;
  --brand-active: #0e4fe0;
  --brand-light: #dce9f5;
  --text-secondary: #4e5969;
  --text-tertiary: #86909c;
  --success: var(--ok);
  --success-bg: #e5f4eb;
  --warning: #b7791f;
  --shadow-card: var(--shadow);
  --shadow-pop: 0 16px 40px rgba(15, 35, 80, 0.16);
  --radius-lg: 14px;
  --radius-sm: 6px;
  --sidebar-bg: var(--sidebar);
  --sidebar-active-bg: rgba(255, 255, 255, 0.12);
  --table-header-bg: #f2f7fc;
  --info-bg: #f2f7fc;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

[data-theme="dark"] {
  --brand: #3c89e8;
  --brand-btn: #1e6ec2;
  --on-brand: #ffffff;
  --scrim: rgba(0, 0, 0, 0.55);
  --brand-soft: rgba(60, 137, 232, 0.18);
  --bg: #14161a;
  --card: #1f2329;
  --text: #e5eaf3;
  --muted: #86909c;
  --border: #2e333b;
  --sidebar: #0d0f12;
  --sidebar-text: #e5eaf3;
  --danger: #f76560;
  --ok: #23c343;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

[data-theme="minimal"] {
  --brand: #0071e3;
  --brand-btn: #0071e3;
  --on-brand: #ffffff;
  --scrim: rgba(0, 0, 0, 0.35);
  --brand-soft: rgba(0, 113, 227, 0.1);
  --bg: #ffffff;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --border: #d2d2d7;
  --sidebar: #f5f5f7;
  --sidebar-text: #1d1d1f;
  --danger: #ff3b30;
  --ok: #34c759;
  --shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
}

a {
  color: inherit;
  text-decoration: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--brand), var(--brand-hover));
}

.brand strong {
  display: block;
  font-size: 0.98rem;
}

.muted {
  color: var(--muted);
  font-size: 0.8rem;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.top-actions select,
.icon-btn,
.btn {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 8px;
  padding: 0.4rem 0.7rem;
  cursor: pointer;
}

.icon-btn {
  width: 36px;
  height: 36px;
  display: inline-grid;
  place-items: center;
}

.layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: calc(100vh - 60px);
}

.sidebar {
  background: var(--sidebar);
  color: var(--sidebar-text);
  padding: 1rem 0.75rem;
}

.nav-item {
  display: block;
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  margin-bottom: 0.25rem;
  opacity: 0.85;
}

.nav-item:hover,
.nav-item.active {
  background: var(--brand-soft);
  color: var(--brand);
  opacity: 1;
}

[data-theme="tech-blue"] .nav-item:hover,
[data-theme="tech-blue"] .nav-item.active {
  color: var(--on-brand);
  background: var(--sidebar-active-bg);
}

.content {
  padding: 1.5rem;
  /* SEC/FE 修复：grid 子项默认 min-width:auto，宽表格/长树行会撑破轨道导致整页横向溢出 */
  min-width: 0;
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.5rem;
}

.panel h1 {
  margin: 0 0 0.5rem;
  font-size: 1.4rem;
}

.lead {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.stat {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  background: var(--bg);
}

.stat-label {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}

.stat-value {
  font-size: 1.25rem;
  font-weight: 650;
}

.stat-value.ok {
  color: var(--ok);
}

.stat-value.bad {
  color: var(--danger);
}

.login-gate {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background:
    linear-gradient(160deg, var(--brand-soft), transparent 45%),
    var(--bg);
}

.login-gate[hidden] {
  display: none !important;
}

.login-card,
.modal-form {
  width: min(400px, 100%);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 1.5rem;
  display: grid;
  gap: 0.85rem;
}

.login-card h1,
.modal-form h2 {
  margin: 0;
  font-size: 1.25rem;
}

.login-card label,
.modal-form label,
.inline-form {
  display: grid;
  gap: 0.3rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.login-card input,
.modal-form input,
.modal-form select,
.toolbar input,
.inline-form input,
.inline-form select {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem 0.8rem;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

.btn.primary {
  background: var(--brand-btn);
  color: var(--on-brand);
  border-color: var(--brand-btn);
  font-weight: 600;
}

.btn.danger {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 35%, var(--border));
}

.form-error {
  margin: 0;
  color: var(--danger);
  font-size: 0.85rem;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0 1rem;
  align-items: center;
}

.toolbar.end {
  justify-content: flex-end;
  margin: 0.5rem 0 0;
}

.table-wrap {
  overflow: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 0.65rem 0.5rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.data-table th {
  color: var(--muted);
  font-weight: 600;
}

.data-table th.sortable {
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}

.data-table th.sortable:hover {
  color: var(--text);
}

.data-table th.sortable::after {
  content: " ↕";
  font-size: 0.75em;
  opacity: 0.35;
}

.data-table th.sortable.asc::after {
  content: " ↑";
  opacity: 0.9;
}

.data-table th.sortable.desc::after {
  content: " ↓";
  opacity: 0.9;
}

.ops {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.inline-form {
  grid-template-columns: 120px 1fr 1fr auto;
  align-items: end;
  margin: 0.75rem 0 1rem;
}

.form-grid {
  display: grid;
  gap: 0.75rem;
}

.modal {
  border: none;
  padding: 0;
  background: transparent;
}

.modal::backdrop {
  background: var(--scrim);
}

.code-block {
  overflow: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem;
  font-size: 0.8rem;
}

.plain-list {
  color: var(--muted);
  line-height: 1.7;
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .inline-form {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: flex;
    gap: 0.35rem;
    overflow-x: auto;
  }

  .nav-item {
    white-space: nowrap;
    margin-bottom: 0;
  }
}