.container {
    margin-top: 1rem;
}

.category-list {
    list-style: none;
    padding: 0;
    border-left: 2px solid #ddd;
    margin-left: 10rem;
}

    .category-list li {
        margin-bottom: 10px;
        position: relative;
        padding-left: 20px;
    }

        .category-list li a {
            text-decoration: none;
            color: #333;
            font-size: 1rem;
        }

        .category-list li.active a {
            color: #ff6600;
            font-weight: bold;
        }

        .category-list li::before {
            content: '';
            position: absolute;
            left: -10px;
            top: 50%;
            transform: translateY(-50%);
            width: 10px;
            height: 10px;
            background-color: #ff6600;
            border-radius: 50%;
            display: none;
        }

        .category-list li.active::before {
            display: block;
        }

.certification-container {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem; /* 박스 내부 사이 간격 */
}

.certification-item {
    width: calc(33.333% - 13.33px); /* 3개씩 정렬 가정 (gap 고려) */
    box-sizing: border-box;
    text-align: center;
    margin-left: 2rem;
    margin-bottom: 1rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 30rem; /* 동일한 높이 고정 */
    border: 1px solid #ddd;
    padding: 1rem;
    background-color: #fff;
}

    .certification-item img {
        max-width: 100%;
        max-height: 22rem;
        object-fit: contain;
        flex-shrink: 0;
        align-self: flex-start; /* ← 상단 정렬 */
    }

    .certification-item .category {
        color: #ff6600;
        font-weight: bold;
        margin-top: 1rem;
    }

    .certification-item .title {
        margin-top: 5px;
        color: #333;
    }

/* 모바일 및 태블릿 반응형 스타일 */
@media (max-width: 991.98px) {

    .category-list {
        list-style: none;
        padding: 0;
        font-size: 1rem;
        border-left: 2px solid #ddd;
        margin-left: 0rem;
    }

        .category-list li {
            margin-bottom: 0.5rem;
            position: relative;
            padding-left: 1rem;
        }

            .category-list li a {
                text-decoration: none;
                color: #333;
                font-size: 0.7rem;
            }
            .category-list li::before {
                left: -5px;
            }

            .category-list li.active::before {
                display: block;
            }

    .certification-container {
        display: flex;
        flex-wrap: wrap;
        gap: 2rem; /* 박스 내부 사이 간격 */
    }

    .certification-item {
        width: calc(50% - 1rem); /* 3개씩 정렬 가정 (gap 고려) */
        box-sizing: border-box;
        text-align: center;
        margin-left: 0.5rem;
        margin-bottom: 1rem;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        height: 22rem; /* 동일한 높이 고정 */
        border: 1px solid #ddd;
        padding: 1rem;
        background-color: #fff;
    }

    .certification-item-inner {
        display: flex;
        flex-direction: column;
        align-items: center;
        height: 100%;
    }

    .certification-img {
        width: 100%;
        height: 15rem; /* 고정된 동일 높이 */
        object-fit: contain; /* 비율 유지하며 빈공간 허용 */
        background-color: #fff; /* 이미지 배경 일관성 확보 */
        display: block;
    }

        .certification-item .category {
            color: #ff6600;
            font-weight: bold;
            font-size: 0.8rem;
            margin-top: 1rem;
        }

        .certification-item .title {
            margin-top: 5px;
            font-size: 0.5rem;
            color: #333;
        }

}