/* ============================================================================
   骨架屏（Skeleton）樣式
   ============================================================================ */

/* 加載骨架屏樣式 */
.news-card-skeleton {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px var(--shadow);
    height: 100%;
    animation: skeleton-pulse 1.5s ease-in-out infinite;
}

.skeleton-image {
    width: 100%;
    height: 180px;
    background: linear-gradient(90deg, 
        var(--bg-secondary) 0%, 
        var(--nav-hover) 50%, 
        var(--bg-secondary) 100%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

.skeleton-content {
    padding: 16px;
}

.skeleton-line {
    height: 12px;
    background: linear-gradient(90deg, 
        var(--bg-secondary) 0%, 
        var(--nav-hover) 50%, 
        var(--bg-secondary) 100%);
    background-size: 200% 100%;
    border-radius: 4px;
    margin-bottom: 12px;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

.skeleton-title {
    height: 18px;
    width: 80%;
    margin-bottom: 10px;
}

.skeleton-description {
    height: 14px;
    width: 100%;
    margin-bottom: 8px;
}

.skeleton-description:last-of-type {
    width: 60%;
}

.skeleton-date {
    height: 12px;
    width: 40%;
    margin-bottom: 0;
}

/* 骨架屏動畫 */
@keyframes skeleton-shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

@keyframes skeleton-pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}