.iso-section-container {
        position: relative;
        border-radius: 0 0 20px 20px;
        border-top-left-radius: 150px;
        overflow: hidden;
        background: #7d7b79;
    }

    .image-overlay {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(to bottom, rgba(0, 0, 0, 0.2) 0%, rgba(0, 0, 0, 0.8) 100%);
        pointer-events: none;
        transition: opacity 0.4s ease-in-out;
        opacity: 1;
        z-index: 2;
    }

    .iso-section-container:hover .image-overlay {
        opacity: 0;
    }

    .iso-section-container img {
        transition: transform 0.4s ease;
        display: block;
        width: 100%;
    }

    .iso-section-container:hover img {
        transform: scale(1.05);
    }

    .section-title {
        font-family: 'Georgia', serif;
        font-weight: 900;
        font-size: 3.5rem;
        line-height: 1.1;
    }

    .orange-label {
        color: #ff5e14;
        letter-spacing: 3px;
        font-weight: bold;
        text-transform: uppercase;
    }

    .feature-card {
        background-color: #f8f9fa;
        border-radius: 15px;
        padding: 30px;
        height: 100%;
    }

    .icon-circle {
        width: 60px;
        height: 60px;
        background-color: #ff5e14;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 20px;
        color: white;
        font-size: 1.5rem;
    }

    .nav-pills .nav-link {
        background:  linear-gradient(145deg, #4f4f4f, #e4e4e4);
        color: white;
        border-radius: 8px;
        margin-bottom: 15px;
        height: 80px;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 1px;
        border: none;
        box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.1);
        transition: all 0.3s ease;
        position: relative;
    }




    .nav-pills .nav-link:hover {
        color: #fff;
        filter: brightness(1.1);
    }

    .nav-pills .nav-link.active {
        background:  linear-gradient(145deg, #f68a0a, #ff8a00) !important;
        color: #f7f6f5 !important;
        border-right: 5px solid #ff8c00;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    }

    .a4-container {
        width: 80%;
        margin: 0 0 0 auto;
        aspect-ratio: 1 / 1.414;
        background-color: white;
        border: 1px solid #dee2e6;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        overflow: hidden;
    }

    .a4-container iframe {
        width: 100%;
        height: 100%;
        border: none;
    }
    @media (max-width: 767.98px) {
        .a4-container {
            width: 100%;
            margin: 0 auto;
        }
    }

    .iso-header {
        font-family: 'Montserrat', sans-serif;
        position: relative;
        line-height: normal;
    }

    .certificate-section {
        position: relative;
        background: url('/assets/img/banner-1.jpg') center center/cover no-repeat;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        text-align: center;
    }

    .certificate-section .overlay {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 1;
    }

    .certificate-section .certificate-content {
        position: relative;
        z-index: 2;
    }