:root {
        --ibm-blue: #061642;
        --accent-blue: #0043ce;
    }

    body {
        background-color: #ffffff;
        font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        color: #333;
    }

    .header-bg {
        background: linear-gradient(180deg, #e0f2ff 0%, #ffffff 100%);
        padding: 60px 0 20px 0;
        position: relative;
    }

    .course-title {
        color: var(--ibm-blue);
        font-weight: 700;
        font-size: clamp(1.8rem, 8vw, 2.5rem);
        max-width: 600px;
    }


    .col-lg-4 {
        position: relative;
        z-index: 10;
    }

    .sidebar-card {
        background: #fff;
        border-radius: 12px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
        padding: 0;
        position: sticky;
        top: 20px;
        margin-top: -150px;
        overflow: hidden;
        border: 1px solid #eee;
        z-index: 10;
    }


    @media (max-width: 991.98px) {
        .sidebar-card {
            margin-top: 20px;
            position: static;
            margin-bottom: 30px;
        }

        .header-bg {
            padding: 40px 0 20px 0;
        }

        .course-title {
            text-align: center;
            max-width: 100%;
        }

        .nav.custom-tabs {
            justify-content: center;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            padding-bottom: 5px;
        }

        .nav.custom-tabs::-webkit-scrollbar {
            display: none;
        }

        .custom-tabs .nav-link {
            padding: 10px 15px;
            white-space: nowrap;
        }

        .mb-3 {
            text-align: center;
        }
    }

    @media (max-width: 575.98px) {

        .btn-add-cart,
        .btn-buy-now {
            font-size: 0.9rem !important;
            padding: 12px 5px !important;
        }

        .price-text {
            font-size: 1.8rem;
            text-align: center;
        }

        .card-body-content h5 {
            text-align: center;
        }
    }

    .card-image-box {
        width: 100%;
        height: auto;
        min-height: 150px;
        background: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 15px;
        overflow: visible;
    }

    .card-image-box img {
        width: 100%;
        height: auto;
        max-height: 250px;
        object-fit: contain;
    }

    .card-body-content {
        padding: 20px;
    }

    .price-text {
        font-size: 1.5rem;
        font-weight: bold;
        margin: 15px 0;
        color: #333;
    }

    .btn-add-cart,
    .btn-buy-now {
        background-color: #002d62;
        color: white;
        border: none;
        transition: 0.3s;
    }

    .btn-add-cart:hover,
    .btn-buy-now:hover {
        background-color: #001a3a;
        color: #fff;
    }
    .custom-tabs {
        border-bottom: 1px solid #dee2e6;
        margin-bottom: 30px;
    }

    .custom-tabs .nav-link {
        border: none;
        color: #555;
        padding: 10px 25px;
        font-weight: 500;
    }
    .custom-tabs .nav-link.active {
        color: var(--accent-blue);
        border-bottom: 3px solid var(--accent-blue);
        background: transparent;
    }
    .check-icon {
        color: var(--accent-blue);
        margin-right: 10px;
    }
    .custom-faq-item {
        border: 1px solid #e9ecef;
        border-radius: 8px;
        margin-bottom: 1rem;
        background: white;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    }

    .custom-faq-question {
        padding: 1.2rem;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-weight: 600;
        color: #061642;
    }

    .custom-faq-question.active i {
        transform: rotate(180deg);
    }

    .custom-faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        padding: 0 1.2rem;
    }

    .custom-faq-answer.show {
        max-height: 500px;
        padding-bottom: 1.2rem;
    }

    .custom-faq-item {
        border: 1px solid #e9ecef;
        border-radius: 8px;
        margin-bottom: 1rem;
        background: white;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    }
    .custom-faq-question {
        padding: 1.2rem;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-weight: 600;
        color: #061642;
        transition: all 0.3s ease;
        border-radius: 8px;
    }

    .custom-faq-question:hover {
        background-color: #f8f9fa;
    }

    .custom-faq-question i {
        transition: transform 0.3s ease;
        color: #0043ce;
    }

    .custom-faq-question.active i {
        transform: rotate(180deg);
    }

    .custom-faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, padding 0.3s ease;
        padding: 0 1.2rem;
    }

    .custom-faq-answer.show {
        max-height: 1000px;
        padding: 0 1.2rem 1.2rem 1.2rem;
    }

    .custom-faq-answer-content {
        color: #6c757d;
        line-height: 1.8;
    }
    /* ----------------------  */
    html {
        scroll-behavior: smooth;
    }

    h3[id] {
        scroll-margin-top: 80px;
    }
  
  
#quantityInput::-webkit-outer-spin-button,
#quantityInput::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}


#quantityInput {
  -moz-appearance: textfield;
}


.input-group .btn {
    z-index: 0 !important;
}