:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #111827;
  --muted: #64748b;
  --line: #dfe3ea;
  --accent: #0d9488;
  --accent-ink: #ffffff;
  --warn: #b45309;
  --danger: #b91c1c;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 13px/1.55 var(--font-ui);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
button, input { font: inherit; }
.admin-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr;
}
.admin-topbar {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.admin-kicker {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}
h1, h2 { margin: 0; letter-spacing: 0; }
h1 { font-size: 20px; line-height: 1.2; }
h2 { font-size: 14px; }
main {
  width: min(1180px, calc(100vw - 28px));
  margin: 0 auto;
  padding: 16px 0 28px;
  display: grid;
  gap: 12px;
}
.admin-dashboard {
  display: grid;
  gap: 12px;
}
.admin-dashboard[hidden],
.admin-error-page[hidden] {
  display: none;
}
.admin-actions, .inline-form {
  display: flex;
  align-items: center;
  gap: 8px;
}
.btn, .icon-link {
  min-height: 32px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 7px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.icon-link { width: 32px; padding: 0; font-size: 18px; }
.btn.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
}
.status-line {
  min-height: 36px;
  display: flex;
  align-items: center;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
}
.status-line.warn { color: var(--warn); border-color: #f3d19c; background: #fffbeb; }
.status-line.danger { color: var(--danger); border-color: #fecaca; background: #fff1f2; }
.admin-error-page {
  min-height: min(520px, calc(100dvh - 132px));
  border: 1px solid #fecaca;
  border-radius: 10px;
  background: #fff;
  display: grid;
  grid-template-columns: minmax(92px, 160px) minmax(0, 1fr);
  align-items: stretch;
  overflow: hidden;
}
.admin-error-code {
  background: #fff1f2;
  color: var(--danger);
  display: grid;
  place-items: center;
  font-size: clamp(34px, 7vw, 74px);
  font-weight: 800;
  line-height: 1;
}
.admin-error-body {
  padding: clamp(22px, 5vw, 52px);
  display: grid;
  align-content: center;
  gap: 12px;
}
.admin-error-kicker {
  color: var(--danger);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.admin-error-body h2 {
  font-size: clamp(22px, 4vw, 34px);
  line-height: 1.18;
}
.admin-error-body p {
  margin: 0;
  max-width: 640px;
  color: #334155;
  font-size: 14px;
}
.admin-error-detail {
  color: var(--muted) !important;
  font-size: 12px !important;
}
.admin-error-actions {
  margin-top: 6px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}
.metric {
  min-height: 82px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 12px;
  display: grid;
  align-content: space-between;
}
.metric.primary-metric {
  border-color: #99f6e4;
  background: #f0fdfa;
}
.metric span { color: var(--muted); font-size: 12px; }
.metric strong { font-size: 26px; line-height: 1; letter-spacing: 0; }
.metric em {
  color: var(--muted);
  font-size: 11px;
  font-style: normal;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}
.panel-head {
  min-height: 48px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.panel-note {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}
.inline-form input {
  width: min(320px, 44vw);
  min-height: 32px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 0 10px;
}
.daily-chart {
  min-height: 138px;
  padding: 12px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(76px, 1fr);
  align-items: end;
  gap: 10px;
  overflow-x: auto;
}
.day-bar {
  min-height: 104px;
  display: grid;
  grid-template-rows: 1fr auto auto;
  gap: 6px;
}
.bar-stack {
  height: 86px;
  display: flex;
  align-items: end;
  gap: 3px;
  border-bottom: 1px solid var(--line);
}
.bar {
  width: 50%;
  min-height: 3px;
  border-radius: 4px 4px 0 0;
}
.bar.login { background: #2563eb; }
.bar.access { background: var(--accent); }
.day-label { color: var(--muted); font-size: 11px; text-align: center; }
.day-count { color: #334155; font-size: 11px; text-align: center; white-space: nowrap; }
.usage-summary {
  padding: 10px 12px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}
.auth-overview {
  padding: 10px 12px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}
.auth-card {
  min-height: 82px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: #fbfdff;
  display: grid;
  align-content: space-between;
  gap: 6px;
}
.auth-card span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}
.auth-card strong {
  font-size: 20px;
  line-height: 1.15;
}
.auth-card em {
  color: var(--muted);
  font-size: 11px;
  font-style: normal;
  line-height: 1.35;
}
.auth-card.warn {
  border-color: #f3d19c;
  background: #fffbeb;
}
.data-map {
  padding: 10px 12px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.data-map-card {
  min-height: 96px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: #fbfdff;
  display: grid;
  align-content: space-between;
  gap: 6px;
}
.data-map-card span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .03em;
  text-transform: uppercase;
}
.data-map-card strong {
  font-size: 13px;
}
.data-map-card em {
  color: var(--muted);
  font-size: 11px;
  font-style: normal;
}
.summary-row {
  min-height: 56px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px;
  display: grid;
  align-content: space-between;
  background: #fbfdff;
}
.summary-row span {
  color: var(--muted);
  font-size: 11px;
}
.summary-row strong {
  font-size: 16px;
  font-weight: 700;
}
.admin-list {
  padding: 8px 12px;
  display: grid;
  gap: 8px;
}
.admin-row {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px;
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.admin-row.locked { background: #f1f5f9; }
.admin-row-main {
  min-width: 0;
  display: grid;
  gap: 1px;
}
.admin-row-main strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.admin-row-main span { color: var(--muted); font-size: 11px; }
.btn.subtle {
  color: var(--muted);
  background: #eef2f7;
  cursor: default;
}
.btn.danger {
  border-color: #fecaca;
  color: var(--danger);
  background: #fff;
}
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}
th, td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
}
th {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .03em;
  text-transform: uppercase;
}
td.num { font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
@media (max-width: 760px) {
  .admin-topbar { align-items: flex-start; flex-direction: column; }
  .admin-actions { width: 100%; justify-content: space-between; }
  .admin-error-page {
    grid-template-columns: 1fr;
    min-height: calc(100dvh - 158px);
  }
  .admin-error-code {
    min-height: 112px;
  }
  .admin-error-actions .btn {
    width: 100%;
  }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .usage-summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .auth-overview { grid-template-columns: 1fr; }
  .data-map { grid-template-columns: 1fr; }
  .panel-head { align-items: stretch; flex-direction: column; }
  .inline-form input { width: 100%; }
}