.sidebar {
  position: fixed;
  top: 0;
  left: -250px;
  width: 240px;
  height: 100%;
  background-color: var(--white);
  padding-top: 0px;
  transition: left 0.3s ease;
  z-index: 1002;
  box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
}

.lab-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-teal) 100%);
  border-bottom: 1px solid var(--primary-dark);
  font-size: 12px;
  color: var(--white);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.stat-number {
  font-weight: bold;
  font-size: 14px;
  color: var(--white);
}

.stat-label {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.8);
}

.stat-divider {
  margin: 0 8px;
  color: rgba(255, 255, 255, 0.5);
}
.sidebar.open {
  left: 0;
}
.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar ul li a {
  display: block;
  padding: 12px 20px;
  color: var(--gray-800);
  text-decoration: none;
  transition: all 0.2s ease;
}
.sidebar ul li a:hover {
  background-color: var(--gray-200);
  color: var(--primary-blue);
  padding-left: 24px;
}
.sidebar ul li a.active {
  background: linear-gradient(90deg, var(--primary-blue) 0%, var(--secondary-teal) 100%);
  color: var(--white);
  font-weight: 500;
}
.sidebar ul .submenu {
  display: none;
  padding-bottom: 12px;
}

.sidebar ul .submenu li a {
  padding-left: 32px;
}

.sidebar ul .has-sub.open {
  display: block;
}

@media (min-width: 720px) {
  .sidebar {
    left: 0 !important;
    z-index: 0;
    padding-top: 56px;
  }

  .container {
    margin-left: 240px; /* sidebar width */
  }

  .hamburger {
    display: none;
  }
}