/**
 * 维护说明：平台后台管理端静态页面，依赖后端 /api/admin 接口，修改表格字段需同步 API 文档。
 */
:root {
  --primary: #315efb;
  --primary-dark: #2148d9;
  --success: #20a76b;
  --warning: #df8b16;
  --danger: #d93f3f;
  --text: #182033;
  --muted: #667085;
  --line: #e7eaf0;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --panel-soft: #f9fafc;
  --shadow: 0 16px 40px rgba(31, 42, 68, 0.08);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background: linear-gradient(135deg, #f5f7fb 0%, #eef3ff 100%);
}
.login-panel {
  width: min(460px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 32px;
  box-shadow: var(--shadow);
}
.brand-block, .sidebar-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.brand-mark {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: #fff;
  background: var(--primary);
  font-size: 24px;
  font-weight: 800;
}
.brand-mark.small { width: 40px; height: 40px; font-size: 18px; }
.login-panel h1 { margin: 0 0 6px; font-size: 24px; }
.login-panel p { margin: 0; color: var(--muted); }
.login-form { margin-top: 28px; display: grid; gap: 18px; }
.login-form label, .modal-form label { display: grid; gap: 8px; color: var(--muted); font-size: 14px; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 11px 12px;
  color: var(--text);
  background: #fff;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(49, 94, 251, 0.1); }
textarea { resize: vertical; min-height: 92px; }
.login-form button, .primary-button {
  border: 0;
  border-radius: 6px;
  padding: 12px 16px;
  color: #fff;
  background: var(--primary, #315efb);
  font-weight: 700;
}
.login-form button:hover, .primary-button:hover { background: var(--primary-dark, #2148d9); }
.form-message { min-height: 20px; font-size: 14px; color: var(--danger) !important; }
.login-note { margin-top: 18px !important; font-size: 13px; line-height: 1.6; }

.admin-shell { min-height: 100vh; display: grid; grid-template-columns: 248px 1fr; }
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 22px 18px;
  background: #111827;
  color: #fff;
  display: flex;
  flex-direction: column;
}
.sidebar-brand { padding: 0 4px 22px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.sidebar-brand strong { display: block; font-size: 16px; }
.sidebar-brand span { display: block; margin-top: 4px; color: #aab2c5; font-size: 13px; }
.nav-search { display: grid; gap: 7px; margin: 18px 4px 0; color: #aab2c5; font-size: 12px; }
.nav-search input { min-width: 0; padding: 9px 10px; color: #fff; background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.12); }
.nav-search input::placeholder { color: #94a3b8; }
.nav-search input:focus { border-color: #8aa4ff; box-shadow: 0 0 0 3px rgba(138,164,255,0.16); }
/* 侧栏只让菜单区域滚动，品牌和退出入口始终可见，适应持续增加的后台模块。 */
.nav-list { display: grid; flex: 1; min-height: 0; gap: 10px; margin: 14px -8px 14px 0; padding: 0 8px 0 0; overflow-y: auto; overscroll-behavior: contain; }
.nav-list::-webkit-scrollbar { width: 6px; }
.nav-list::-webkit-scrollbar-thumb { border-radius: 6px; background: rgba(203,213,225,0.34); }
.nav-section { border-bottom: 1px solid rgba(255,255,255,0.08); padding-bottom: 10px; }
.nav-section summary { display: flex; align-items: center; min-height: 32px; padding: 0 14px; color: #94a3b8; cursor: pointer; font-size: 12px; font-weight: 700; list-style: none; }
.nav-section summary::-webkit-details-marker { display: none; }
.nav-section summary::after { content: '+'; margin-left: auto; color: #aab2c5; font-size: 16px; font-weight: 400; }
.nav-section[open] summary::after { content: '−'; }
.nav-section-items { display: grid; gap: 4px; }
.nav-list button, .logout-button {
  border: 0;
  border-radius: 6px;
  padding: 12px 14px;
  color: #cbd5e1;
  background: transparent;
  text-align: left;
}
.nav-list button:hover, .nav-list button.active { color: #fff; background: rgba(255,255,255,0.1); }
.nav-search-empty { margin: 0; padding: 14px; color: #94a3b8; font-size: 13px; text-align: center; }
.logout-button { margin-top: auto; border: 1px solid rgba(255,255,255,0.12); text-align: center; }
.logout-button:hover { color: #fff; background: rgba(255,255,255,0.08); }

.workspace { min-width: 0; padding: 24px; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}
.topbar h2 { margin: 0 0 6px; font-size: 26px; }
.topbar p { margin: 0; color: var(--muted); }
.ghost-button, .danger-button, .small-button {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 12px;
  color: var(--text);
  background: #fff;
}
.ghost-button:hover, .small-button:hover { border-color: var(--primary); color: var(--primary); }
.danger-button { color: var(--danger); }
/* 翻页按钮到边界后保持布局稳定，同时明确不可点击状态。 */
.small-button:disabled, .ghost-button:disabled, .danger-button:disabled { cursor: not-allowed; opacity: 0.45; }

.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-bottom: 18px; }
.summary-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 18px; }
.summary-grid .metric-card { display: grid; gap: 8px; text-align: left; color: var(--text); }
.summary-grid .metric-card span { color: var(--muted); font-size: 13px; }
.summary-grid .metric-card strong { font-size: 24px; }
.metric-card, .panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 4px 18px rgba(31, 42, 68, 0.04);
}
.metric-card { padding: 18px; }
.metric-label { color: var(--muted); font-size: 13px; }
.metric-value { display: block; margin-top: 10px; font-size: 28px; font-weight: 800; }
.metric-note { margin-top: 8px; color: var(--muted); font-size: 12px; }
.panel { padding: 18px; margin-bottom: 18px; }
.panel-header, .toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.panel-header h3 { margin: 0; font-size: 18px; }
.toolbar-left, .toolbar-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.toolbar input { min-width: 260px; }
.filter-toolbar {
  align-items: flex-end;
}
.filter-field {
  display: grid;
  gap: 6px;
  min-width: 180px;
  color: var(--muted);
  font-size: 13px;
}
.filter-field span {
  font-weight: 700;
}
.filter-field input,
.filter-field select {
  min-width: 180px;
}
.filter-field-wide input {
  min-width: 300px;
}
.filter-summary {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 13px;
}
.filter-chip {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 2px 8px;
  border-radius: 999px;
  background: #eef3ff;
  color: var(--primary);
}
.filter-chip.muted {
  background: #f0f2f5;
  color: var(--muted);
}
.table-loading {
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; min-width: 820px; background: #fff; }
th, td { padding: 13px 14px; border-bottom: 1px solid var(--line); text-align: left; font-size: 14px; vertical-align: middle; }
th { color: var(--muted); background: var(--panel-soft); font-weight: 700; }
tr:last-child td { border-bottom: 0; }
.empty { padding: 42px; color: var(--muted); text-align: center; }
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  background: #eef2ff;
  color: var(--primary);
}
.badge.success { background: #e9f8f0; color: var(--success); }
.badge.warning { background: #fff4df; color: var(--warning); }
.badge.danger { background: #fff0f0; color: var(--danger); }
.badge.muted { background: #f0f2f5; color: var(--muted); }

/* 订单剩余支付时间单元格：等宽数字避免跳动，待支付用警告橙，超时后转灰 -mimo */
.countdown-cell {
  font-variant-numeric: tabular-nums;
  color: var(--warning);
  font-weight: 600;
  white-space: nowrap;
}
.countdown-cell.expired {
  color: var(--muted);
  font-weight: 400;
}
.action-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.pager { display: flex; justify-content: flex-end; align-items: center; gap: 10px; margin-top: 14px; color: var(--muted); }
.content-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.content-tabs button { border: 1px solid var(--line); border-radius: 6px; padding: 9px 12px; background: #fff; }
.content-tabs button.active { border-color: var(--primary); color: #fff; background: var(--primary); }
.system-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.system-item { padding: 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel-soft); }
.system-item span { display: block; color: var(--muted); font-size: 13px; }
.system-item strong { display: block; margin-top: 8px; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat-card { padding: 18px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel-soft); text-align: center; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--text); }
.stat-label { font-size: 13px; color: var(--muted); margin-top: 6px; }
.stat-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.stat-chip { display: inline-block; padding: 4px 12px; border-radius: 999px; background: #f0f2f5; font-size: 13px; color: var(--text); }
.panel-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.panel-header h3 { margin: 0; }
.badge-hot { display: inline-block; padding: 2px 8px; border-radius: 4px; background: #fef3c7; color: #d97706; font-size: 12px; margin-right: 4px; }
.badge-rec { display: inline-block; padding: 2px 8px; border-radius: 4px; background: #dbeafe; color: #2563eb; font-size: 12px; }

.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 40;
  max-width: 360px;
  padding: 12px 16px;
  border-radius: 8px;
  color: #fff;
  background: #111827;
  box-shadow: var(--shadow);
}
.modal-mask {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(15, 23, 42, 0.48);
}
.modal-panel {
  width: min(620px, 100%);
  max-height: min(760px, 92vh);
  overflow: auto;
  background: #fff;
  border-radius: 8px;
  box-shadow: var(--shadow);
}
.modal-panel header {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.modal-panel h3 { margin: 0; }
#modalClose { border: 0; background: transparent; font-size: 26px; color: var(--muted); }
.modal-form { display: grid; gap: 16px; padding: 20px; }
.modal-static-field { display: grid; gap: 8px; color: var(--muted); font-size: 14px; }
.modal-static-field div {
  max-height: 180px;
  overflow: auto;
  padding: 12px;
  color: var(--text);
  line-height: 1.6;
  white-space: normal;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.coupon-list-panel { display: grid; gap: 12px; }
.coupon-list-header { display: flex; justify-content: space-between; gap: 10px; color: var(--muted); font-size: 14px; }
.coupon-list-panel .table-wrap { max-height: 360px; overflow: auto; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; padding-top: 4px; flex-wrap: wrap; }
.modal-actions button { min-width: 96px; }
.detail-stack { display: grid; gap: 16px; padding: 20px; }
.detail-grid { display: grid; grid-template-columns: minmax(110px, auto) minmax(0, 1fr); gap: 10px 16px; padding: 20px; }
.detail-grid strong { color: var(--muted); font-size: 13px; }
.detail-grid span { min-width: 0; overflow-wrap: anywhere; }
.image-strip { display: flex; gap: 10px; overflow-x: auto; padding: 0 20px 12px; }
.image-strip img { width: 88px; height: 88px; flex: 0 0 auto; object-fit: cover; border: 1px solid var(--line); border-radius: 6px; }
.product-editor-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 20px; }
.product-editor-grid label { display: grid; gap: 7px; color: var(--muted); font-size: 13px; }
.product-editor-grid input,
.product-editor-grid select,
.product-editor-grid textarea { width: 100%; box-sizing: border-box; }
.product-editor-grid textarea { min-height: 92px; resize: vertical; }
.product-editor-grid .editor-wide { grid-column: 1 / -1; }
.wallet-strip { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1px; background: var(--line); }
.wallet-strip > div { display: grid; gap: 8px; padding: 16px; background: var(--panel); }
.wallet-strip span { color: var(--muted); font-size: 13px; }
.wallet-strip strong { font-size: 20px; }
.wallet-strip .wallet-debt strong { color: #dc2626; }

@media (max-width: 980px) {
  .admin-shell { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; }
  .nav-list { max-height: 48vh; }
  .nav-section-items { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .metric-grid, .summary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .wallet-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .workspace { padding: 16px; }
  .topbar, .panel-header, .toolbar { align-items: stretch; flex-direction: column; }
  .nav-section-items { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric-grid, .summary-grid, .system-grid, .product-editor-grid, .wallet-strip { grid-template-columns: 1fr; }
  .product-editor-grid .editor-wide { grid-column: auto; }
  .detail-grid { grid-template-columns: 1fr; }
  .toolbar input { min-width: 0; }
  .filter-field,
  .filter-field input,
  .filter-field select,
  .filter-field-wide input {
    width: 100%;
    min-width: 0;
  }
}