:root {
  --brand: #0d6efd;
  --brand-dark: #084298;
  --sidebar-bg: #10233f;
  --sidebar-hover: #16324f;
}

body {
  background-color: #f4f6f9;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* Navbar */
.app-navbar {
  background: linear-gradient(90deg, var(--sidebar-bg), var(--brand-dark));
  z-index: 1040;
}

/* Layout */
.app-wrapper {
  display: flex;
  min-height: calc(100vh - 56px);
}

.app-sidebar {
  width: 240px;
  background-color: var(--sidebar-bg);
  flex-shrink: 0;
  background-color: black !important;
}

.app-content {
  flex: 1;
  min-width: 0;
}

@media (min-width: 992px) {
  .app-sidebar {
    position: sticky;
    top: 56px;
    height: calc(100vh - 56px);
  }
}

/* Sidebar nav */
.app-nav .nav-link {
  color: rgba(255,255,255,.75);
  padding: .75rem 1.25rem;
  border-left: 3px solid transparent;
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: .95rem;
}
.app-nav .nav-link i { font-size: 1.1rem; width: 20px; text-align: center; }
.app-nav .nav-link:hover {
  background-color: var(--sidebar-hover);
  color: #fff;
}
.app-nav .nav-link.active {
  background-color: var(--sidebar-hover);
  color: #fff;
  border-left-color: var(--brand);
  font-weight: 600;
}

/* Cards */
.stat-card {
  border: none;
  border-radius: .75rem;
  color: #fff;
  box-shadow: 0 4px 14px rgba(0,0,0,.08);
}
.stat-card .stat-icon {
  font-size: 2.2rem;
  opacity: .5;
}
.stat-card.bg-blue { background: linear-gradient(135deg,#0d6efd,#0a58ca); }
.stat-card.bg-green { background: linear-gradient(135deg,#198754,#146c43); }
.stat-card.bg-red { background: linear-gradient(135deg,#dc3545,#b02a37); }
.stat-card.bg-orange { background: linear-gradient(135deg,#fd7e14,#c85f0a); }

.card { border: none; border-radius: .75rem; box-shadow: 0 2px 10px rgba(0,0,0,.06); }
.card-header { background-color: #fff; border-bottom: 1px solid #eef0f3; border-radius: .75rem .75rem 0 0 !important; font-weight: 600; }

.table thead th { white-space: nowrap; font-size: .82rem; text-transform: uppercase; letter-spacing: .03em; color: #6c757d; }

.qr-box img { background: #fff; padding: 6px; border: 1px solid #dee2e6; border-radius: .5rem; }

#qr-reader { width: 100%; max-width: 480px; margin: 0 auto; }
#qr-reader video { border-radius: .5rem; }

.brand-login {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--sidebar-bg), var(--brand-dark));
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card { border-radius: 1rem; max-width: 420px; width: 100%; }

.detail-label { color: #6c757d; font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
.detail-value { font-size: 1.02rem; font-weight: 600; }