main {
    margin-bottom: 0;
    min-width: 0;
}
.detail_page {
    padding-top: var(--sec-gap);
    padding-bottom: calc(var(--sec-gap) + 50px);
}

.detail_inner {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: var(--con-gap);
}
/***** detail_side *****/
.detail_side .sticky {
    position: sticky;
    top: var(--header-gap);
}
.detail_info {
    margin-bottom: 50px;
}
.detail_desc {
    font-size: var(--ft16);
    color: var(--gray-700);
    font-weight: var(--medium);
}
.badge {
    width: fit-content;
    padding: 10px 16px;
    background: var(--accent);
    font-size: var(--ft18);
    font-weight: var(--medium);
    color: white;
    border-radius: 99px;
    line-height: 1;
    margin-bottom: 24px;
}
.page_title {
    font-size: var(--ft34);
    font-weight: var(--semi-bold);
    color: var(--ft-main);   
}
.meta {
    display: flex;
    align-items: center;
    --gap: 16px;
    gap: var(--gap);
    margin-top: 30px;
}
.meta span {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--gap);
    color: var(--gray-600);
}
.meta span:not(:last-child)::after {
    content: '';
    display: block;
    width: 1px;
    height: 14px;
    background: var(--line);
}
.date {
    font-size: var(--ft16);
    font-weight: var(--medium);
    color: var(--ft-sub);
}



.post_thumb {
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--con-gap);
}
.editor p {
    color: var(--gray-800);
    font-size: var(--ft16);
}




/***** post nav *****/
.post_nav {
    margin-top: 40px;
}
.post_nav .row {
    display: flex;
    align-items: center;
    --gap: 40px;
    gap: var(--gap);
    border: 1px solid var(--line);
    background: white;
    border-radius: var(--radius-md);
    padding: 16px;
}

.post_nav_btn,
.post_nav_list {
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;   
    transition: background .4s ease;
    min-width: 0;
    padding: 16px 24px;
    gap: 30px;
}
.post_nav_btn {
    justify-content: start;
    position: relative;
    min-width: 0;
}
.post_nav_btn:first-child::after {
    content: '';
    display: block;
    width: 1px;
    background: var(--line);
    position: absolute;
    top: 12px;
    bottom: 12px;
    right: 0;
    transform: translateX(calc(var(--gap) / 2));

}


.post_nav_btn .top {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--ft-sub);
    font-size: var(--ft14);
    font-weight: var(--normal);
}

.post_nav_btn .title {
    color: var(--ft-sub);
    font-size: var(--ft16);
    font-weight: var(--semi-bold);
}

.post_nav_list {
    gap: 16px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    justify-content: center;    
    background: white;
    color: var(--gray-800);
    font-size: var(--ft16);
    font-weight: var(--normal);
    width: fit-content;
    margin-top: 10px;
}
.post_nav_list .icon {
    width: 20px;
    height: 20px;
}
.post_nav_btn .icon {
    width: 14px;
    height: 14px;
    position: relative;
}
.post_nav_btn .icon img {
    position: relative;
    z-index: 1;
}
.post_nav_btn .icon::after {
    position: absolute;
    content: '';
    display: block;
    border-radius: 50%;
    background: var(--bg);
    inset: -8px;
    z-index: 0;
}


.post_nav_btn:hover,
.post_nav_list:hover {
    background: var(--hover-light);
}








/* index */
.index {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: start;
    padding: 10px;
    border-radius: var(--radius-sm);
    background: white;
    border: 1px solid var(--line);
}

.index li {
    width: 100%;
    padding: 10px 12px;
    cursor: pointer;
    font-weight: var(--semi-bold);
    font-size: var(--ft16);
    color: var(--gray-500);
    transition: .3s;
}

.index li.on {
    color: var(--primary);
    background: var(--bg);
    border-radius: var(--radius-sm);
}
.index li:hover {
    color: var(--primary);
}

.index > span {
    position: absolute;
    left: 0;
    width: 2px;
    background: var(--accent);
}

.detail_btns {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: var(--sec-gap);
    --btn-size: 56px;
}
.detail_btns .fir_btn {
    height: var(--btn-size);
    gap: 10px;
    padding: 10px 10px 10px 24px;
    background: linear-gradient(to left, var(--gradient), var(--gradient)) no-repeat center / 400%;
    border-radius: 99px;
    width: fit-content;
    font-size: var(--ft17);
    font-weight: var(--semi-bold);
    color: white;
    transition: background .6s ease;
}
.detail_btns .fir_btn.black_btn {
    background: var(--bg-dark);
}
.detail_btns .fir_btn.black_btn:hover {
    background: var(--primary);
}
.detail_btns .btn_icon {
    --size: 36px;
    width: var(--size);
    height: var(--size);
    border-radius: 50%;
    background: var(--white-200);
    transform: scale(1);
    transition: transform .3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}
.detail_btns .icon_btn {
    width: var(--btn-size);
    height: var(--btn-size);
    aspect-ratio: 1;
    flex-shrink: 0;
    border-radius: 50%;
    background: white;
    border: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .4s ease;
}

.detail_btns .btn_icon img {
    width: 20px;
    height: 20px;
}

.detail_btns .fir_btn:hover {
    background-position: 0% 0;
}
.detail_btns .icon_btn:hover {
    background: var(--primary-light);
}
.detail_btns .btn:hover .btn_icon {
    transform: scale(.9);
}



/***** detail_area *****/
.detail_area {
    padding: 50px;
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    background: white;
    min-height: 300px;
}


/* case_detail */
.case_detail {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.case_detail .desc {
    font-size: var(--ft18);
    font-weight: var(--normal);
    color: var(--gray-700);
    margin-bottom: 50px;
}
.detail_con {
    padding: 50px 0;
    border-top: 1px solid var(--line);
}
.detail_title {
    font-size: var(--ft24);
    font-weight: var(--semi-bold);
    color: var(--gray-800);
    margin-bottom: 30px;
}

.detail_text {
    font-size: var(--ft16);
    font-weight: var(--medium);
    color: var(--gray-700);
}

.detail_text p {
    font-size: var(--ft16);
    font-weight: var(--medium);
    color: var(--ft-sub);    
}

.detail_text p:last-child {
    margin-bottom: 0;
}
.detail_img {
    width: 100%;
    max-width: 440px;
    margin-top: 60px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    overflow: hidden;
} 

@media all and (max-width: 1400px) {
    .detail_inner {
        grid-template-columns: 350px 1fr;
    }
    .page_title {
        font-size: var(--ft28);
    }
    .detail_area {
        padding: 32px;
    }

    .post_nav .row {
        padding: 10px;
    }
    .post_nav_btn {
        gap: 20px;
        flex-direction: column;
        align-items: stretch;
    }
}

@media all and (max-width: 1024px) {
    .detail_inner {
        display: flex;
        flex-direction: column;
    }
    .detail_info {
        margin-bottom: 24px;
    }
    .detail_btns {
        margin-top: 24px;
    }
}

@media all and (max-width: 768px) {
    .badge {
        margin-bottom: 16px;
        padding: 8px 12px;
        font-size: var(--ft16);
    }
    .page_title {
        margin-bottom: 20px;
        font-size: var(--ft24);
    }
    .meta {
        --gap: 12px;
    }
    .meta span:not(:last-child)::after {
        height: 8px;
    }
    .detail_btns {
        --btn-size: 45px;
    }
    .detail_btns .btn_icon {
        --size: 24px;
    }
    .detail_btns .btn_icon img {
        width: 16px;
        height: 16px;
    }
    .detail_btns .fir_btn {
        font-size: var(--ft16);
    }

    .case_detail .desc {
        font-size: var(--ft16);
        margin-bottom: 20px;
    }
    .detail_con {
        padding: 32px 0;
    }
    .detail_area {
        padding: 20px;
    }
    .detail_title {
        font-size: var(--ft20);
        margin-bottom: 20px;
    }

    .post_nav {
        margin-top: 10px;
    }
    .post_nav_btn {
        padding: 0;
        gap: 12px;
    }
    .post_nav_btn .top {
        gap: 10px;
    }
    .post_nav_btn .icon::after {
        inset: -5px;
    }
    .post_nav .row {
        --gap: 28px;
        padding: 20px;
        flex-direction: column;
    }
    .post_nav_btn {
        background: var(--white) !important;
    }
    .post_nav_btn .icon {
        width: 12px;
        height: 12px;
        transform: rotate(90deg);
    }
    .post_nav_list {
        margin: 10px auto 0;
        padding: 16px;
        gap: 10px;
    }
    .post_nav_btn:first-child::after {
        display: none;
    }
}