.logo-img {
    height: 50px;
    margin-bottom: 20px;
}

.sidebar {
    height: 100vh;
    background-color: #3f51b5;
    color: white;
    padding: 1rem;
    position: fixed;
    width: 220px;
    transition: all 0.3s;
    z-index: 1000;
    /* for Panel name */
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.sidebar a {
    color: white;
    text-decoration: none;
    display: block;
    margin: 0.6rem 0;
}

.sidebar a:hover {
    color: #FFC107;
}

.sidebar-footer {
    font-size: 0.875rem;
    background-color: rgba(255, 255, 255, 0.05);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.main-content {
    margin-left: 220px;
    transition: all 0.3s;
}

.sidebar.collapsed {
    margin-left: -220px;
}

.main-content.expanded {
    margin-left: 0;
}

.topbar {
    background-color: #ffffff;
    border-bottom: 1px solid #dee2e6;
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 999;
}

.toggle-btn {
    font-size: 1.25rem;
    cursor: pointer;
    margin-right: 1rem;
}

.course-title-box {
    background: linear-gradient(135deg, #3f51b5, #f4df9c);
    width: 100%;
    text-decoration: none;
}

.badge-topic {
    background-color: #e9f5ff;
    color: #007bff;
    margin: 3px;
    font-size: 0.75rem;
}

  .btn-primary {
      border-color: #4255A4;
  }

  .btn-outline-primary:hover {
      background: #f3f3f5;
  }

  .btn:hover {
      border-color: #4255A4;
  }

  .small-batch-card .badge {
      font-size: 11px;
      padding: 2px 6px;
      border-radius: 0.3rem;
  }
  .small-batch-card{
        background-color: #e9ecef;
  }

  .startClass{
    margin-top: 0.5rem;
  }

@media (max-width: 768px) {
    .sidebar {
        margin-left: -220px;
    }

    .sidebar.show {
        margin-left: 0;
    }

    .main-content {
        margin-left: 0;
    }

    .mb-0 {
        font-size: medium;
    }
}