body {
  background-color: #f4f6f8;
}

.card-stat {
  border-left: 4px solid #0d6efd;
}

.card-stat.overdue {
  border-left-color: #dc3545;
}

.card-stat.today {
  border-left-color: #fd7e14;
}

.navbar-collapse.bg-dark .nav-link {
  color: #ffffff;
  font-weight: 500;
  padding-top: 0.6rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-collapse.bg-dark .nav-link:last-child {
  border-bottom: none;
}

.navbar-collapse.bg-dark .nav-link:hover,
.navbar-collapse.bg-dark .nav-link:focus {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

.navbar-collapse.bg-dark {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}