/**
 * 管理后台页面壳：与首页 / 练习页同一套 theory-hero · overview · chapter 语言
 * 运营管理、反馈管理共用
 */

.admin-shell-body {
  padding: 24px 0 72px;
}

.admin-range-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin-bottom: 14px;
}

.admin-range-row label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
}

.admin-range-row select {
  width: auto;
  min-width: 110px;
  margin: 0;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 14px;
  background: var(--color-bg-white);
}

.admin-range-row .ast-status {
  margin: 0;
  flex: 1;
  min-width: 120px;
}

.admin-auth-panel,
.admin-content-panel {
  background: var(--color-bg-white, #FEFEFD);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card, 16px);
  padding: 20px 18px;
  margin-bottom: 12px;
}

.admin-auth-panel h2,
.admin-content-panel > h2,
.admin-panel-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.admin-auth-panel p,
.admin-help {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.55;
  margin-bottom: 14px;
}

.admin-auth-panel label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text-secondary);
}

.admin-auth-panel input,
.admin-field input,
.admin-field select,
.admin-toolbar select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 12px;
  background: var(--color-bg-white);
  color: var(--color-text-primary);
}

.admin-auth-actions,
.admin-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}

.admin-toolbar {
  margin-bottom: 12px;
}

.admin-toolbar label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-secondary);
  margin: 0;
}

.admin-toolbar select {
  width: auto;
  margin: 0;
  min-width: 110px;
}

.admin-auth-error {
  color: #B91C1C;
  font-size: 13px;
  margin-bottom: 10px;
  min-height: 1.2em;
}

.admin-forbidden {
  padding: 16px 18px;
  background: #FEF2F2;
  border: 1px solid #FECACA;
  border-radius: var(--radius-card, 16px);
  color: #991B1B;
  font-size: 14px;
  line-height: 1.55;
  margin-bottom: 12px;
}

.admin-muted {
  color: var(--color-text-secondary);
  font-size: 13px;
}

.admin-status {
  font-size: 13px;
  color: var(--color-text-secondary);
  min-height: 1.2em;
  margin-bottom: 10px;
}

.admin-kpis {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.admin-kpi {
  background: var(--color-bg-white, #FEFEFD);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card, 16px);
  padding: 14px 16px;
}

.admin-kpi-label {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.admin-kpi-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.admin-kpi-sub {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

.admin-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 12px;
  align-items: start;
  margin-bottom: 12px;
}

@media (max-width: 900px) {
  .admin-grid {
    grid-template-columns: 1fr;
  }
}

.admin-chart {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 160px;
  padding-top: 8px;
  border-bottom: 1px solid var(--color-border);
}

.admin-bar-wrap {
  flex: 1;
  min-width: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  position: relative;
}

.admin-bar {
  width: 100%;
  max-width: 18px;
  background: var(--color-chrome, var(--color-primary));
  border-radius: 3px 3px 0 0;
  min-height: 2px;
  opacity: 0.9;
}

.admin-bar-uv {
  width: 100%;
  max-width: 18px;
  background: #94A3B8;
  border-radius: 3px 3px 0 0;
  min-height: 0;
  margin-top: 1px;
  opacity: 0.7;
}

.admin-bar-tip {
  display: none;
  position: absolute;
  bottom: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  background: #1e293b;
  color: #fff;
  font-size: 11px;
  padding: 4px 6px;
  border-radius: 4px;
  white-space: nowrap;
  z-index: 2;
  pointer-events: none;
}

.admin-bar-wrap:hover .admin-bar-tip {
  display: block;
}

.admin-chart-legend {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 10px;
}

.admin-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  margin-right: 4px;
  vertical-align: middle;
}

.admin-dot--pv { background: var(--color-chrome, var(--color-primary)); }
.admin-dot--uv { background: #94A3B8; }

/* JS 仍输出 ast-* 类名时的别名 */
.ast-kpis,
#ast-kpis.ast-kpis,
.ast-kpis {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}
.ast-kpi {
  background: var(--color-bg-white, #FEFEFD);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card, 16px);
  padding: 14px 16px;
}
.ast-kpi-label { font-size: 12px; color: var(--color-text-secondary); margin-bottom: 6px; }
.ast-kpi-value {
  font-size: 22px; font-weight: 700; color: var(--color-text-primary);
  font-variant-numeric: tabular-nums; letter-spacing: -0.02em;
}
.ast-kpi-sub { font-size: 12px; color: var(--color-text-secondary); margin-top: 4px; }
.ast-muted, .afb-muted { color: var(--color-text-secondary); font-size: 13px; }
.ast-chart {
  display: flex; align-items: flex-end; gap: 3px; height: 160px; padding-top: 8px;
  border-bottom: 1px solid var(--color-border);
}
.ast-bar-wrap {
  flex: 1; min-width: 0; height: 100%; display: flex; flex-direction: column;
  justify-content: flex-end; align-items: center; position: relative;
}
.ast-bar {
  width: 100%; max-width: 18px; background: var(--color-chrome, var(--color-primary));
  border-radius: 3px 3px 0 0; min-height: 2px; opacity: 0.9;
}
.ast-bar-uv {
  width: 100%; max-width: 18px; background: #94A3B8; border-radius: 3px 3px 0 0;
  min-height: 0; margin-top: 1px; opacity: 0.7;
}
.ast-bar-tip {
  display: none; position: absolute; bottom: calc(100% + 4px); left: 50%; transform: translateX(-50%);
  background: #1e293b; color: #fff; font-size: 11px; padding: 4px 6px; border-radius: 4px;
  white-space: nowrap; z-index: 2; pointer-events: none;
}
.ast-bar-wrap:hover .ast-bar-tip { display: block; }
.ast-chart-legend {
  display: flex; gap: 16px; font-size: 12px; color: var(--color-text-secondary); margin-top: 10px;
}
.ast-dot { display: inline-block; width: 8px; height: 8px; border-radius: 2px; margin-right: 4px; vertical-align: middle; }
.ast-dot--pv { background: var(--color-chrome, var(--color-primary)); }
.ast-dot--uv { background: #94A3B8; }
.ast-table, .admin-table {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
.ast-table th, .ast-table td, .admin-table th, .admin-table td {
  text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--color-border-light, #E5E7EB);
}
.ast-table th, .admin-table th { font-weight: 600; color: var(--color-text-secondary); font-size: 12px; }
.ast-table td.num, .admin-table td.num { text-align: right; font-variant-numeric: tabular-nums; }
.ast-path, .admin-path {
  word-break: break-all; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px;
}
.ast-status { font-size: 13px; color: var(--color-text-secondary); min-height: 1.2em; margin-bottom: 10px; }
.ast-auth-error, .afb-auth-error { color: #B91C1C; font-size: 13px; margin-bottom: 10px; min-height: 1.2em; }

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.admin-table th,
.admin-table td {
  text-align: left;
  padding: 8px 6px;
  border-bottom: 1px solid var(--color-border-light, #E5E7EB);
}

.admin-table th {
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: 12px;
}

.admin-table td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.admin-path {
  word-break: break-all;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
}

/* 反馈管理：筛选项与双栏 */
.admin-filters {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  align-items: end;
  margin-bottom: 12px;
}

.admin-filters label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.admin-filters input,
.admin-filters select {
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 14px;
  margin: 0;
}

.admin-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  align-items: start;
}

@media (max-width: 960px) {
  .admin-split {
    grid-template-columns: 1fr;
  }
}

.admin-card {
  background: var(--color-bg-white, #FEFEFD);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card, 16px);
  overflow: hidden;
}

.admin-card > h2 {
  font-size: 15px;
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-tray, #FBFAFA);
  margin: 0;
}

.afb-table-wrap { overflow-x: auto; max-height: 62vh; }
.afb-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.afb-table th,
.afb-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--color-border-light, #E5E7EB);
  vertical-align: top;
}
.afb-table th {
  position: sticky;
  top: 0;
  background: var(--color-bg-white);
  z-index: 1;
  font-weight: 600;
  color: var(--color-text-secondary);
}
.afb-table tbody tr { cursor: pointer; }
.afb-table tbody tr:hover { background: var(--color-bg-tray, #FBFAFA); }
.afb-row--active { background: color-mix(in srgb, var(--color-chrome) 8%, white) !important; }
.afb-preview { max-width: 220px; color: var(--color-text-secondary); line-height: 1.4; word-break: break-word; }
.afb-mono { font-family: ui-monospace, monospace; font-size: 12px; }
.afb-time { white-space: nowrap; color: var(--color-text-secondary); font-size: 12px; }
.afb-badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; }
.afb-badge--ok { background: #DCFCE7; color: #166534; }
.afb-badge--wait { background: #FEF3C7; color: #92400E; }
.afb-load-more { padding: 12px; text-align: center; border-top: 1px solid var(--color-border); }
.afb-detail-body { padding: 16px; }
.afb-d-section { margin-bottom: 16px; }
.afb-d-section h3 { font-size: 13px; font-weight: 600; margin-bottom: 8px; color: var(--color-text-secondary); }
.afb-meta-grid { display: grid; gap: 6px; font-size: 13px; }
.afb-user-body {
  white-space: pre-wrap; word-break: break-word; background: var(--color-bg-tray, #FBFAFA);
  padding: 12px; border-radius: 10px; font-size: 14px; line-height: 1.55; max-height: 200px; overflow: auto;
  border: 1px solid var(--color-border);
}
.afb-attachments a { color: var(--color-chrome, var(--color-primary)); word-break: break-all; }
.afb-device {
  font-size: 12px; white-space: pre-wrap; background: #0B1220; color: #E2E8F0;
  padding: 12px; border-radius: 10px; max-height: 120px; overflow: auto;
}
.afb-prev-md {
  white-space: pre-wrap; word-break: break-word; background: var(--color-bg-tray, #FBFAFA);
  padding: 12px; border-radius: 10px; font-size: 13px; max-height: 160px; overflow: auto; margin-bottom: 12px;
  border: 1px solid var(--color-border);
}
.afb-md-input {
  width: 100%; min-height: 200px; padding: 12px; border: 1px solid var(--color-border); border-radius: 10px;
  font-family: ui-monospace, monospace; font-size: 14px; line-height: 1.5; resize: vertical;
}
.afb-preview-box {
  margin-top: 12px; padding: 12px; border: 1px dashed var(--color-border); border-radius: 10px;
  min-height: 80px; font-size: 14px; line-height: 1.55;
}
.afb-preview-box h1, .afb-preview-box h2, .afb-preview-box h3 { margin: 0.6em 0 0.3em; font-size: 1.1em; }
.afb-preview-box ul { padding-left: 1.2em; }
.afb-preview-box a { color: var(--color-chrome, var(--color-primary)); text-decoration: underline; word-break: break-all; }
.afb-preview-box p { margin: 0.35em 0; }
.afb-detail-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.afb-modal[hidden] { display: none !important; }
.afb-modal { position: fixed; inset: 0; z-index: 10000; display: flex; align-items: center; justify-content: center; padding: 16px; box-sizing: border-box; }
.afb-modal-backdrop { position: absolute; inset: 0; background: rgba(15, 23, 42, 0.45); cursor: pointer; }
.afb-modal-card {
  position: relative; max-width: 560px; width: 100%; max-height: 90vh; overflow: auto;
  background: var(--color-bg-white); border-radius: var(--radius-card, 16px); padding: 20px;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.18); border: 1px solid var(--color-border);
}
.afb-modal-card h3 { font-size: 17px; margin-bottom: 8px; }
.afb-modal-preview { max-height: min(45vh, 360px); overflow: auto; margin: 12px 0; border-style: solid; }
.afb-modal-actions { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; margin-top: 8px; }

/* 兼容旧 class 名（admin-stats / admin-feedback JS 仍用 ast-* / afb-* 按钮类时映射） */
.ast-btn,
.afb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: var(--radius-button, 14px);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  background: var(--color-primary);
  color: #fff;
  text-decoration: none;
}
.ast-btn:hover,
.afb-btn:hover { background: var(--color-primary-hover); color: #fff; }
.ast-btn--secondary,
.afb-btn--secondary {
  background: var(--color-bg-white);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}
.ast-btn--secondary:hover,
.afb-btn--secondary:hover {
  background: var(--color-bg-tray, #FBFAFA);
  color: var(--color-text-primary);
}