/* ── Skeleton shimmer ─────────────────────────────────────────────────────── */
@keyframes skeleton-shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton {
    background: linear-gradient(90deg, #e2e5e7 25%, #eef0f2 50%, #e2e5e7 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.4s ease-in-out infinite;
    border-radius: 6px;
    color: transparent !important;
    user-select: none;
    pointer-events: none;
}

/* Hide child content while skeleton is active */
.skeleton * {
    visibility: hidden !important;
}

/* Image wrapper — sits over the <img> while it loads */
.skeleton-img-wrap {
    position: relative;
    display: block;
    background: #e2e5e7;
    border-radius: 6px;
    overflow: hidden;
}

.skeleton-img-wrap::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent 25%, rgba(255,255,255,0.5) 50%, transparent 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.4s ease-in-out infinite;
}

.skeleton-img-wrap img {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.skeleton-img-wrap.loaded img {
    opacity: 1;
}

.skeleton-img-wrap.loaded::after {
    display: none;
}

/* Generic skeleton bar — used in accordion + related course placeholders */
.skel-bar {
    display: block;
    background: linear-gradient(90deg, #e2e5e7 25%, #eef0f2 50%, #e2e5e7 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.4s ease-in-out infinite;
    border-radius: 4px;
}