/* Admin UI styles */
:root {
  --admin-bg: #f5f7fb;
  --admin-surface: #ffffff;
  --admin-border: #e7ecf2;
  --admin-primary: #3bb0e3;
  --admin-primary-dark: #2a90bf;
}

body.admin-body {
  background: var(--admin-bg);
  color: #1f2a3d;
}

.admin-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.admin-nav {
  background: #0f172a;
}

.admin-nav .navbar-brand {
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.admin-nav .nav-link {
  color: #c9d6e8;
  font-weight: 600;
}
.admin-nav .nav-link:hover,
.admin-nav .nav-link.active {
  color: #fff;
}

.admin-main {
  flex: 1;
  padding: 1.5rem 0;
}

.admin-card {
  background: var(--admin-surface);
  border: 1px solid var(--admin-border);
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

.stat-card {
  border: 1px solid var(--admin-border);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  background: #fff;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.04);
}

.stat-card .label {
  font-size: 0.9rem;
  color: #5f6b7c;
}

.stat-card .value {
  font-size: 1.8rem;
  font-weight: 800;
  color: #1f2a3d;
}

.table thead th {
  background: #f0f4f9;
  border-bottom: 1px solid var(--admin-border);
}

.filter-bar {
  background: #fff;
  border: 1px solid var(--admin-border);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.03);
}

.btn-admin {
  background: var(--admin-primary);
  color: white;
  border: none;
  font-weight: 700;
}
.btn-admin:hover {
  background: var(--admin-primary-dark);
  color: white;
}

.login-hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(120deg, #64c4ec, #2f4057);
}

.login-card {
  width: 100%;
  max-width: 480px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.15);
  padding: 2rem;
  border: 1px solid var(--admin-border);
}