.certificates-section {
    padding: 40px 0;
    margin: 0 auto 80px;
    max-width: 1200px;
}

.section-title {
    text-align: center;
    margin-bottom: 30px;
    font-size: 28px;
    color: #333;
}

.custom-accordion {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.accordion-item {
    border-bottom: 1px solid #e0e0e0;
}

.accordion-item:last-child {
    border-bottom: none;
}

.accordion-header {
    width: 100%;
    padding: 18px 25px;
    background-color: #f8f9fa;
    border: none;
    text-align: left;
    font-size: 18px;
    font-weight: 600;
    color: #333;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.accordion-header:hover,
.accordion-header.active {
    background-color: #e9ecef;
}

.accordion-header.active .accordion-icon {
    transform: rotate(45deg);
}

.accordion-icon {
    font-size: 24px;
    transition: transform 0.3s ease;
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: #fff;
}

.accordion-content.show {
    max-height: 1000px;
}

.pdf-container {
    padding: 20px;
    height: 500px;
}

.pdf-container embed {
    width: 100%;
    height: 100%;
    border: 1px solid #eee;
}

@media (max-width: 768px) {
    .section-title {
        font-size: 24px;
        margin-bottom: 20px;
    }

    .accordion-header {
        padding: 15px 20px;
        font-size: 16px;
    }

    .pdf-container {
        height: 400px;
        padding: 15px;
    }
}

@media (max-width: 576px) {
    .certificates-section {
        padding: 30px 15px;
    }

    .section-title {
        font-size: 22px;
    }

    .pdf-container {
        height: 300px;
        padding: 10px;
    }
}