:root {
  --bg: #f0f2f5;
  --surface: #ffffff;
  --ink: #1d2327;
  --muted: #5b6772;
  --line: #dcdcde;
  --brand: #2271b1;
  --brand-strong: #135e96;
  --danger: #b32d2e;
  --sidebar: #1d2327;
  --sidebar-2: #2c3338;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

.admin-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 250px 1fr;
}

.sidebar {
  background: var(--sidebar);
  color: #c3c4c7;
  border-right: 1px solid #15191c;
  padding: 14px 0;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px 16px;
  border-bottom: 1px solid #2c3338;
  margin-bottom: 12px;
}

.logo {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--brand) 0%, #3c8dc8 100%);
}

.sidebar-brand strong {
  display: block;
  color: #fff;
  font-size: 14px;
}

.sidebar-brand small {
  color: #9ea7af;
  font-size: 12px;
}

.menu {
  display: grid;
  gap: 2px;
}

.menu-title {
  margin: 10px 14px 4px;
  color: #7a8a99;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  font-weight: 700;
}

.menu a {
  color: #c3c4c7;
  text-decoration: none;
  padding: 9px 14px;
  border-left: 3px solid transparent;
  font-size: 13px;
}

.menu a:hover {
  background: var(--sidebar-2);
  color: #fff;
}

.menu a[aria-current="page"] {
  background: #2271b11f;
  border-left-color: #72aee6;
  color: #fff;
}

.main {
  padding: 16px;
  display: grid;
  gap: 14px;
}

.topbar {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.topbar h1 {
  margin: 0;
  font-size: 24px;
}

.topbar p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.top-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.btn {
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #fff;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
}

.btn:hover { background: var(--brand-strong); border-color: var(--brand-strong); }

.btn-secondary {
  background: #f6f7f7;
  border-color: #dcdcde;
  color: #2c3338;
}

.btn-secondary:hover {
  background: #f0f0f1;
  border-color: #bfc3c5;
}

.btn-danger {
  background: #fff;
  border-color: #d63638;
  color: #d63638;
}

.btn-danger:hover {
  background: #fef0f1;
  border-color: #b32d2e;
  color: #b32d2e;
}

.file-btn { display: inline-flex; align-items: center; }

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(150px, 1fr));
  gap: 12px;
}

.kpi {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
}

.kpi p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  font-weight: 700;
}

.kpi h2 {
  margin: 8px 0 4px;
  font-size: 28px;
  line-height: 1;
}

.kpi small { color: #6c7781; font-size: 12px; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
}

.card-head h3 {
  margin: 0;
  font-size: 18px;
}

.card-head span {
  color: var(--muted);
  font-size: 12px;
}

.content-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 12px;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 8px;
}

.quick-grid a {
  display: block;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid #dcdcde;
  border-radius: 6px;
  padding: 10px;
  font-size: 13px;
  background: #f6f7f7;
}

.quick-grid a:hover {
  border-color: #8c8f94;
  background: #fff;
}

.status {
  margin: 10px 0 0;
  font-size: 13px;
  color: #3c434a;
}

.health-list,
.activity-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.health-list li,
.activity-list li {
  font-size: 13px;
  color: #2c3338;
}

.table-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.table-wrap { overflow: auto; }

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

th, td {
  text-align: left;
  padding: 8px;
  border-bottom: 1px solid #f0f0f1;
}

th {
  background: #f6f7f7;
  color: #50575e;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

td.num, th.num {
  text-align: right;
  white-space: nowrap;
}

@media (max-width: 1200px) {
  .admin-shell { grid-template-columns: 220px 1fr; }
  .kpi-grid { grid-template-columns: repeat(2, minmax(130px, 1fr)); }
  .quick-grid { grid-template-columns: repeat(3, minmax(120px, 1fr)); }
  .content-grid,
  .table-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .admin-shell { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid #15191c; }
  .topbar { flex-direction: column; align-items: flex-start; }
  .top-actions { justify-content: flex-start; }
  .quick-grid { grid-template-columns: repeat(2, minmax(110px, 1fr)); }
}

@media (max-width: 500px) {
  .quick-grid,
  .kpi-grid { grid-template-columns: 1fr; }
}