/**
 * 유관된 소스 섹션 스타일
 */

.related-sources-section {
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.related-sources-section h5 {
    font-weight: 700;
    color: #111111;
}

.related-sources-wrapper {
    margin-top: 0.75rem;
    position: relative;
}

/* Swiper 컨테이너 */
.related-sources-swiper {
    width: 100%;
    padding-bottom: 20px;
    overflow: hidden;
}

.related-sources-swiper .swiper-wrapper {
    align-items: stretch;
    display: flex;
}

.related-sources-swiper .swiper-slide {
    height: auto;
    display: flex;
    flex-direction: column;
    width: 100% !important;
    flex-shrink: 0;
}

.related-sources-swiper .swiper-slide .row {
    height: 100%;
    margin: 0;
    width: 100%;
}

.related-source-item {
    margin-bottom: 0.5rem;
    padding: 0 4px;
}

.related-source-link {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease;
    height: 100%;
}

.related-source-link:hover {
    transform: scale(1.02);
}

.related-source-thumbnail {
    position: relative;
    width: 100%;
    padding-bottom: 78.92%; /* 132/167 = 78.92% aspect ratio */
    background-color: #f5f5f5;
    border-radius: 4px;
    border: 1px solid #DDDDDD;
    overflow: hidden;
}

.related-source-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.related-source-thumbnail:hover img {
    transform: scale(1.1);
}

.related-source-thumbnail .no-thumbnail {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    color: #c0c0c0;
}

.related-source-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0) 100%);
    padding: 1rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.related-source-thumbnail:hover .related-source-overlay {
    opacity: 1;
}

.overlay-content {
    color: #FDFDFD;
}

.source-title {
    margin: 0 0 0.5rem 0;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.source-meta {
    display: flex;
    gap: 0.75rem;
    font-size: 0.75rem;
    font-weight: 400;
}

.source-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.source-meta i {
    font-size: 0.875rem;
}

/* Swiper 네비게이션 버튼 */
.related-sources-swiper .swiper-button-next,
.related-sources-swiper .swiper-button-prev {
    width: 31px;
    height: 31px;
    border-radius: 50%;
    background-color: #FFFFFF;
    border: 1px solid #D9D9D9;
    box-shadow: 0px 0px 4px 0px rgba(0, 0, 0, 0.25);
    color: #111111;
    transition: all 0.2s ease;
    margin-top: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.related-sources-swiper .swiper-button-next {
    right: 0;
}

.related-sources-swiper .swiper-button-prev {
    left: 0;
}

.related-sources-swiper .swiper-button-next:after,
.related-sources-swiper .swiper-button-prev:after {
    font-size: 12px;
    font-weight: 700;
    color: #111111;
    opacity: 1;
}

.related-sources-swiper .swiper-button-next:hover,
.related-sources-swiper .swiper-button-prev:hover {
    background-color: #f5f5f5;
    border-color: #999999;
    transform: translateY(calc(-50% - 2px));
    box-shadow: 0px 2px 8px 0px rgba(0, 0, 0, 0.3);
}

.related-sources-swiper .swiper-button-next:active,
.related-sources-swiper .swiper-button-prev:active {
    transform: translateY(-50%);
    box-shadow: 0px 0px 4px 0px rgba(0, 0, 0, 0.25);
}

.related-sources-swiper .swiper-button-disabled {
    opacity: 0.35;
    cursor: auto;
    pointer-events: none;
}

/* 로딩 인디케이터 */
.related-sources-loading {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

/* 반응형 */
@media (max-width: 768px) {
    .related-source-thumbnail {
        padding-bottom: 78.92%;
    }
    
    .source-title {
        font-size: 0.8125rem;
    }
    
    .source-meta {
        font-size: 0.6875rem;
    }
    
    .related-sources-swiper .swiper-button-next,
    .related-sources-swiper .swiper-button-prev {
        width: 28px;
        height: 28px;
    }
    
    .related-sources-swiper .swiper-button-next:after,
    .related-sources-swiper .swiper-button-prev:after {
        font-size: 10px;
    }
}

/* 로딩 애니메이션 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.related-source-item {
    animation: fadeIn 0.3s ease;
}