.infinite-scroll-feed {
    position: relative;
}

.is-sentinel {
    width: 100%;
    height: 1px;
    margin: 0;
    padding: 0;
    pointer-events: none;
}

.is-article-separator {
    height: 4px;
    margin: 48px 0 32px;
    background: linear-gradient(90deg, transparent, #cbd5e1, transparent);
    border: 0;
}

.is-skeleton {
    padding: 24px 0 48px;
}

.is-skeleton-hero {
    height: 180px;
    border-radius: 12px;
    background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
    background-size: 200% 100%;
    animation: is-shimmer 1.2s infinite;
    margin-bottom: 16px;
}

.is-skeleton-line {
    height: 14px;
    border-radius: 6px;
    background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
    background-size: 200% 100%;
    animation: is-shimmer 1.2s infinite;
    margin-bottom: 10px;
}

.is-skeleton-line.short {
    width: 60%;
}

@keyframes is-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.is-related-links .is-related-label {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #6b7280;
    margin-bottom: 8px;
}

.is-related-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.is-related-list li {
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid #f3f4f6;
}

.is-related-list li:last-child {
    border-bottom: 0;
    margin-bottom: 0;
    padding-bottom: 0;
}

.is-related-link {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: #1d4ed8;
    text-decoration: none;
    line-height: 1.4;
}

.is-related-link:hover {
    text-decoration: underline;
}

.is-related-meta {
    display: block;
    font-size: 11px;
    color: #9ca3af;
    margin-top: 2px;
}

.is-article-body-wrap.is-collapsed .is-article-body {
    position: relative;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.is-article-body-wrap.is-expanded .is-article-body {
    max-height: none !important;
    overflow: visible;
}

.is-article-fade {
    display: none;
}

.is-article-body-wrap.is-collapsed .is-article-fade {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 72px;
    background: linear-gradient(to bottom, rgba(248, 250, 252, 0) 0%, #f8fafc 85%);
    pointer-events: none;
}

.is-show-more-btn {
    min-width: 160px;
    font-weight: 600;
    border-radius: 8px;
}

.is-show-more-wrap {
    display: none;
}

.is-article-body-wrap.is-collapsed .is-show-more-wrap {
    display: block;
}