:root {
  --admin-bg: #0d141c;
  --admin-panel: #151f2b;
  --admin-panel-2: #1b2836;
  --admin-line: rgba(255,255,255,.08);
  --admin-text: #eef5fb;
  --admin-muted: #93a4b6;
  --admin-blue: #4c7da1;
  --admin-green: #22b66b;
  --admin-red: #dc4b5a;
}

body {
  margin: 0;
  background: var(--admin-bg);
  color: var(--admin-text);
}

.admin-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
}

.sidebar {
  background: #101924;
  border-right: 1px solid var(--admin-line);
  padding: 22px;
}

.brand {
  font-size: 24px;
  font-weight: 900;
  margin-bottom: 28px;
}

.sidebar nav {
  display: grid;
  gap: 6px;
}

.sidebar a {
  color: var(--admin-muted);
  text-decoration: none;
  border-radius: 8px;
  padding: 12px 14px;
  font-weight: 700;
}

.sidebar a.active,
.sidebar a:hover {
  background: var(--admin-panel-2);
  color: var(--admin-text);
}

.content {
  min-width: 0;
}

.topbar {
  min-height: 92px;
  border-bottom: 1px solid var(--admin-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 28px;
}

.topbar h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 900;
}

.content main {
  padding: 24px 28px;
}

.admin-card {
  background: var(--admin-panel);
  border: 1px solid var(--admin-line);
  border-radius: 8px;
  padding: 18px;
  box-shadow: 0 10px 32px rgba(0,0,0,.16);
}

.metric {
  background: linear-gradient(180deg, #1e2c3a, #151f2b);
  border: 1px solid var(--admin-line);
  border-radius: 8px;
  padding: 18px;
}

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

.metric strong {
  display: block;
  font-size: 34px;
  line-height: 1.1;
}

.table-admin {
  --bs-table-bg: #151f2b;
  --bs-table-border-color: rgba(255,255,255,.08);
  --bs-table-color: #eef5fb;
}

.login-admin {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at top, #315c79, #0d141c 48%);
}

.login-admin form {
  width: min(440px, calc(100vw - 32px));
  background: rgba(16, 25, 36, .95);
  border: 1px solid var(--admin-line);
  border-radius: 8px;
  padding: 28px;
}

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

  .sidebar {
    position: static;
  }

  .sidebar nav {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }
}