.course-grid__list-item li + li{
        margin-top: 0px !important;
    }
    .course-grid{
        padding: 0px 0 0px;
    }
    .course-grid__left{
        margin-right: 5px !important;
    }
    @media (min-width: 1200px) {
      .col-xl-3 {
        flex: 0 0 auto;
        width: 21%;
      }
    }
    .scrollable-sidebar {
        padding: 25px 15px 20px;
        overflow-y: auto;
        background: #eff5fd;
        height: calc(100vh - 100px);
    }
    .course-grid__list-text{
        color: #494949 !important;
    }
    .center_area{
        padding: 25px 40px 20px;
        overflow-y: auto;
        height: calc(100vh - 100px);
    }
    .scroll-container-wrapper {
        display: flex;
        align-items: center;
        background: #00919a;
        padding: 2px;
        overflow: hidden;
    }

    .scroll-arrow {
        color: white;
        font-size: 17px;
        cursor: pointer;
        padding: 0 5px;
        user-select: none;
        z-index: 10;
    }

    .scroll-container {
        display: flex;
        overflow-x: auto;
        scroll-behavior: smooth;
        gap: 10px;
        scrollbar-width: none; /* Firefox */
    }

    .scroll-container::-webkit-scrollbar {
        display: none; /* Chrome/Safari */
    }

    .scroll-item {
        white-space: nowrap;
        color: white;
        padding: 2px 10px;
        border-radius: 4px;
        cursor: pointer;
        flex: 0 0 auto;
        font-size: 16px;
    }
    .scroll-item:hover, .scroll-item.active {
        background: #006a70;
        font-weight: bold;
    }
    .topic-h5{
        margin: -4px 0 4px 0;
    }
    .course-li-grid{
        padding: 4px 15px 3px 5px; line-height: 1.5;
    }
    .course-gridm{
        margin-bottom: 0px !important; 
    }



    /* Mobile sidebar styles */
    .mobile-sidebar {
        position: fixed;
        top: 0;
        left: -300px;
        width: 280px;
        height: 100%;
        overflow-y: auto;
        transition: left 0.3s ease-in-out;
        z-index: 1000;
        box-shadow: 2px 0 5px rgba(0, 0, 0, 0.3);
        padding: 25px 15px 20px;
        background: #eff5fd
    }

    .mobile-sidebar.open {
        left: 0;
    }

    .btn-outline-primary{
        outline: #006a70 !important;
        color: #006a70 !important;
        border-color: #006a70 !important;
    }

    .btn-outline-primary:hover{
        color: #fff !important;
        border-color: #006a70 !important;
        background-color: #006a70 !important;
    }

    .btn-primary{
        background-color: #006a70 !important;
    }

    @media (max-width: 576px) {
      .prebtn{
        font-size: 14px;
        margin-right: 5%;     
      }
      .nextbtn{
        font-size: 14px;
      }
      .question-box { display: none; padding: 10px !important;}
    }

    .btn-warning{
        background: #F57A53;
        border: #F57A53;
    }

    .btn-warning:hover{
        background: #F57A53;
        border: #F57A53;
    }

    .question-box { display: none; padding: 30px;}
    .question-box.active { display: block;}
    .option { padding: 10px; margin: 5px 0; border: 1px solid #aaa; border-radius: 5px; cursor: pointer; }
    .option.correct { background-color: #d4edda; border-color: #28a745; color: #155724; } /* green */
    .option.incorrect { background-color: #f8d7da; border-color: #dc3545; color: #721c24; } /* red */
    .option.disabled { pointer-events: none; opacity: 0.8; }
    .navigation { margin-bottom: 20px; text-align: center;}
    
    code[class*="language-"]{
        padding: 3px 5px !important;
        font-family: var(--fistudy-font) !important;
    }
    
    pre[class*="language-"]{
        background: #d4edda !important;
        padding: 0.4em !important;
    }
    h4{
        padding-bottom: 10px !important;
        font-size: 1.2rem !important;
        padding-top: 10px !important;
    }
    p{
        font-size: 16px !important;
    }
    h1{
        font-size: 1.75rem !important;
    }
    h2{
        font-size: 1.5rem !important;
        padding-bottom: 10px !important;
    }
    h3{
        font-size: 1.2rem !important;
        padding-bottom: 10px !important;
        padding-top: 10px !important;
        
    }