:root {
  color-scheme: light;
  font-family: Inter, "Segoe UI", "Microsoft YaHei", sans-serif;
  --bg: #f5f7f5;
  --surface: #fff;
  --ink: #17211b;
  --muted: #667169;
  --line: #dce3de;
  --brand: #176b49;
  --brand-hover: #10543a;
  --positive: #176b49;
  --negative: #a63f34;
}

.operations-control-list, .operations-announcement-list { display: grid; gap: .8rem; }
.operations-control-row, .operations-announcement-row { display: flex; justify-content: space-between; gap: 1rem; padding: 1rem; border: 1px solid var(--border); border-radius: 14px; }
.operations-control-row > div:first-child, .operations-announcement-row > div:first-child { display: grid; gap: .35rem; }
.operations-control-row small, .operations-announcement-row small { color: var(--muted); }
.operations-control-row code { width: fit-content; color: var(--accent); }
.operations-control-action { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: .7rem; }
.operations-content-form { display: grid; gap: 1rem; }
.operations-content-fields { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.operations-announcement-row p { margin: 0; white-space: pre-wrap; }
@media (max-width: 760px) {
    .operations-control-row, .operations-announcement-row { flex-direction: column; }
    .operations-control-action { justify-content: space-between; }
    .operations-content-fields { grid-template-columns: 1fr; }
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--bg); }
a { color: var(--brand); text-decoration: none; }
button, input, select, textarea { font: inherit; }
:where(a, button, input, select, textarea):focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }
.topbar { min-height: 68px; padding: 0 max(24px, calc((100vw - 1180px) / 2)); display: flex; align-items: center; gap: 32px; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.brand { color: var(--ink); font-size: 1.06rem; font-weight: 850; white-space: nowrap; }
.topbar nav { display: flex; flex: 1; }
.topbar nav a { color: var(--muted); padding: 9px 13px; border-radius: 9px; font-weight: 650; }
.topbar nav a.active, .topbar nav a:hover { background: #e8f2ec; color: var(--brand-hover); }
.user-menu { display: flex; align-items: center; gap: 16px; color: var(--muted); font-size: .86rem; }
.page-content { max-width: 1180px; margin: 0 auto; padding: 42px 24px 80px; }
.page-heading, .section-title { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.page-heading { margin-bottom: 24px; }
.page-heading h1, .section-title h2 { margin: 0; }
.eyebrow { margin: 0 0 7px; color: var(--brand); font-size: .75rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.panel { margin-bottom: 20px; padding: 22px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; }
.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-bottom: 20px; }
.metric { padding: 20px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; }
.metric span { display: block; color: var(--muted); font-size: .82rem; }
.metric strong { display: block; margin-top: 8px; font-size: 1.7rem; }
.button { display: inline-flex; justify-content: center; border: 0; border-radius: 10px; padding: 11px 17px; font-weight: 750; cursor: pointer; }
.button.primary { background: var(--brand); color: #fff; }
.button.secondary { background: #e8eee9; color: #164d37; }
.button.danger { background: var(--negative); color: #fff; }
.button.large { width: 100%; padding: 14px 18px; }
.filter-bar { display: grid; grid-template-columns: minmax(240px, 1fr) auto; gap: 12px; align-items: end; margin-bottom: 18px; }
label { color: var(--muted); font-size: .86rem; font-weight: 650; }
label input, label select, label textarea { display: block; width: 100%; margin-top: 6px; padding: 10px 12px; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 9px; }
.success-message, .alert { margin: 0 0 18px; padding: 12px 15px; border-radius: 10px; }
.success-message { color: #155c3d; background: #dff1e5; }
.alert { color: #8f332a; background: #fff0ee; }
.pagination { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 18px; color: var(--muted); font-size: .86rem; }
.row-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.empty { color: var(--muted); }
.admin-readonly-badge { padding: 6px 10px; border-radius: 999px; color: #164d37; background: #e1eee6; font-size: .78rem; font-weight: 750; }
.operations-dashboard { margin-bottom: 20px; padding: 22px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; }
.operations-dashboard-heading { align-items: flex-start; margin-bottom: 18px; }
.operations-dashboard-heading h2, .operations-trend h3 { margin: 0 0 5px; }
.operations-dashboard-heading span, .operations-trend-title small { color: var(--muted); font-size: .82rem; }
.operations-dashboard-actions { display: flex; align-items: center; gap: 12px; }
.operations-kpi-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.operations-kpi { min-width: 0; padding: 17px; border-radius: 13px; background: var(--bg); }
.operations-kpi > span, .operations-period-grid span { display: block; color: var(--muted); font-size: .78rem; }
.operations-kpi strong { display: block; margin: 7px 0 4px; font-size: 1.65rem; }
.operations-period-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 1px; margin-top: 14px; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: var(--line); }
.operations-period-grid article { padding: 13px; background: var(--surface); }
.operations-period-grid strong { display: block; margin-top: 5px; font-size: 1.12rem; }
.operations-v2-grid, .operations-detail-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 14px; }
.operations-insight, .operations-detail { min-width: 0; padding: 17px; border: 1px solid var(--line); border-radius: 13px; }
.operations-insight h3, .operations-detail h3 { margin: 0 0 5px; }
.operations-insight > div > small, .operations-detail > div > small { color: var(--muted); font-size: .78rem; }
.operations-insight-values, .operations-retention-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 14px; }
.operations-insight-values article, .operations-retention-grid article { padding: 12px; border-radius: 10px; background: var(--bg); }
.operations-insight-values span, .operations-retention-grid span { display: block; color: var(--muted); font-size: .75rem; }
.operations-insight-values strong, .operations-retention-grid strong { display: block; margin: 5px 0 2px; font-size: 1.12rem; }
.operations-trend { margin-top: 22px; }
.operations-trend-title { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; margin-bottom: 10px; }
.operations-legend { display: flex; gap: 13px; flex-wrap: wrap; color: var(--muted); font-size: .75rem; }
.operations-legend span::before { content: ""; display: inline-block; width: 8px; height: 8px; margin-right: 5px; border-radius: 999px; background: currentColor; }
.operations-legend .new-users { color: #8a6b17; }
.operations-legend .active-users { color: #287e9b; }
.operations-legend .transactions { color: var(--brand); }
.operations-trend-scroll { overflow-x: auto; }
.operations-trend-table { width: 100%; min-width: 650px; border-collapse: collapse; table-layout: fixed; font-size: .78rem; }
.operations-trend-table th, .operations-trend-table td { padding: 8px 10px; border-top: 1px solid var(--line); text-align: left; }
.operations-trend-table th { width: 74px; color: var(--muted); font-weight: 650; }
.operations-trend-table td { position: relative; overflow: hidden; }
.operations-trend-table td strong { position: relative; z-index: 1; font-variant-numeric: tabular-nums; }
.trend-bar { position: absolute; inset: 5px auto 5px 0; max-width: calc(100% - 8px); border-radius: 6px; opacity: .16; }
.trend-bar.new-users { background: #c49b30; }
.trend-bar.active-users { background: #3d9fbe; }
.trend-bar.transactions { background: var(--brand); }
.operations-detail-grid { margin-top: 22px; }
.operations-detail-table { width: 100%; min-width: 360px; margin-top: 10px; border-collapse: collapse; font-size: .78rem; }
.operations-detail-table th, .operations-detail-table td { padding: 8px 10px; border-top: 1px solid var(--line); text-align: right; font-variant-numeric: tabular-nums; }
.operations-detail-table th:first-child { text-align: left; color: var(--muted); font-weight: 650; }
.admin-status-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.admin-status-item { display: grid; gap: 6px; padding: 14px; border-radius: 12px; background: var(--bg); }
.admin-status-item span, small { color: var(--muted); }
.status-ok { color: var(--positive); }
.status-error, .admin-failed { color: var(--negative) !important; }
.admin-user-list, .admin-audit-list { display: grid; }
.admin-user-row { display: grid; grid-template-columns: minmax(190px, 1.3fr) minmax(250px, 1.5fr) minmax(180px, 1fr) auto; gap: 16px; align-items: center; padding: 15px 0; border-bottom: 1px solid var(--line); }
.admin-user-primary, .admin-user-security, .admin-audit-row > div:first-child { display: grid; gap: 5px; }
.admin-user-flags { display: flex; flex-wrap: wrap; gap: 6px; }
.admin-chip { padding: 4px 8px; border-radius: 999px; background: var(--bg); color: var(--muted); font-size: .73rem; font-weight: 700; }
.admin-chip.ok { color: #155c3d; background: #dff1e5; }
.admin-chip.warn { color: #805b00; background: #fff4d6; }
.admin-chip.danger { color: #8f332a; background: #fff0ee; }
.admin-danger-zone { border-color: rgba(166,63,52,.35); }
.admin-danger-zone label { display: grid; gap: 6px; margin: 12px 0; }
.admin-danger-zone textarea { min-height: 82px; resize: vertical; }
.admin-audit-filters { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; align-items: end; margin-bottom: 16px; }
.admin-audit-row { min-height: 62px; display: flex; justify-content: space-between; align-items: center; gap: 18px; border-bottom: 1px solid var(--line); }
.admin-audit-row > div:last-child { display: flex; align-items: center; justify-content: flex-end; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: .82rem; }
.auth-page { min-height: calc(100vh - 150px); display: grid; place-items: center; }
.auth-card { width: min(440px, 100%); padding: 32px; background: var(--surface); border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 16px 50px rgba(23,33,27,.08); }
.auth-card h1 { margin: 0 0 12px; font-size: 2rem; }
h1:focus { outline: none; }
.auth-card > p { color: var(--muted); line-height: 1.6; }
.auth-card form { display: grid; gap: 16px; margin-top: 22px; }
@media (max-width: 760px) {
  .topbar { padding: 14px 18px; flex-wrap: wrap; gap: 12px; }
  .topbar nav { order: 3; flex: 0 0 100%; }
  .user-menu span { display: none; }
  .page-content { padding: 28px 16px 60px; }
  .metric-grid, .operations-kpi-grid, .admin-status-grid, .admin-audit-filters, .filter-bar { grid-template-columns: 1fr; }
  .operations-period-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .operations-v2-grid, .operations-detail-grid { grid-template-columns: 1fr; }
  .operations-dashboard-heading, .operations-trend-title { align-items: flex-start; flex-direction: column; }
  .operations-dashboard-actions { width: 100%; justify-content: space-between; }
  .admin-user-row { grid-template-columns: 1fr; }
  .admin-audit-row, .admin-heading { align-items: flex-start; flex-direction: column; }
}
@media (prefers-color-scheme: dark) {
  :root { color-scheme: dark; --bg:#111612; --surface:#19201b; --ink:#edf2ee; --muted:#aab4ad; --line:#2c352e; --brand:#69dda9; --brand-hover:#9aefc8; --positive:#6cdda9; --negative:#ff9a8e; }
  .topbar { background: rgba(25,32,27,.96); }
  .topbar nav a.active, .topbar nav a:hover { background: #243a2e; }
}