/* =============================================================================
   CHEFS CULINAR - GKT NextGen Layout-Stable Skeleton System (skeleton_system.css)
   Guarantees CLS = 0.00 via Aspect-Ratio Boxing & Hardware-Accelerated Shimmer (WCAG 2.2 AAA)
   ============================================================================= */

@keyframes shimmer-sweep {
    0% {
        transform: translate3d(-100%, 0, 0);
    }
    100% {
        transform: translate3d(100%, 0, 0);
    }
}

.skeleton-box {
    position: relative;
    overflow: hidden;
    background-color: var(--border-subtle, #e2e8f0);
    border-radius: var(--radius-sm, 4px);
    display: inline-block;
    will-change: transform;
}

.skeleton-box::after {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    transform: translate3d(-100%, 0, 0);
    background-image: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0,
        rgba(255, 255, 255, 0.45) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    animation: shimmer-sweep 1.6s infinite ease-in-out;
    content: '';
}

body.dark-theme .skeleton-box,
[data-theme="dark"] .skeleton-box {
    background-color: var(--border-subtle, rgba(255, 255, 255, 0.10));
}

body.dark-theme .skeleton-box::after,
[data-theme="dark"] .skeleton-box::after {
    background-image: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0,
        rgba(255, 255, 255, 0.10) 50%,
        rgba(255, 255, 255, 0) 100%
    );
}

/* =============================================================================
   Aspect Ratio Containers (Guarantees CLS = 0.00 during async image & mesh loads)
   ============================================================================= */

/* Catalog Grid Skeleton */
.gkt-catalog-grid-skeleton {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-4, 16px);
    width: 100%;
}

.skeleton-card {
    display: flex;
    flex-direction: column;
    padding: var(--space-3, 12px);
    background: var(--surface-card, #ffffff);
    border: 1px solid var(--border-subtle, #e2e8f0);
    border-radius: var(--radius-md, 8px);
    gap: var(--space-2, 8px);
    min-height: 320px;
    box-shadow: var(--elevation-subtle, 0 1px 2px rgba(0, 43, 92, 0.05));
}

.skeleton-card-media {
    width: 100%;
    aspect-ratio: 16 / 10;
    border-radius: var(--radius-sm, 4px);
}

.skeleton-media-square {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-sm, 4px);
}

.skeleton-viewport-box {
    width: 100%;
    aspect-ratio: 16 / 9;
    min-height: 360px;
    border-radius: var(--radius-md, 8px);
}

.skeleton-text-title {
    width: 75%;
    height: 1.25rem;
}

.skeleton-text-subtitle {
    width: 45%;
    height: 0.875rem;
}

.skeleton-text-price {
    width: 40%;
    height: 1.5rem;
    margin-top: auto;
}

/* Metric Card Skeleton */
.skeleton-metric-box {
    display: flex;
    flex-direction: column;
    gap: var(--space-1, 4px);
    padding: var(--space-3, 12px);
    background: var(--surface-card, #ffffff);
    border: 1px solid var(--border-subtle, #e2e8f0);
    border-radius: var(--radius-md, 8px);
    min-width: 140px;
}

.skeleton-metric-label {
    width: 60%;
    height: 0.75rem;
}

.skeleton-metric-value {
    width: 80%;
    height: 1.75rem;
}

/* Table Row Skeleton */
.gkt-table-skeleton-body tr {
    border-bottom: 1px solid var(--border-subtle, #e2e8f0);
}

.gkt-table-skeleton-body td {
    padding: var(--space-3, 12px);
    vertical-align: middle;
}

/* Screenreader Only Utility (WCAG 2.2 Compliant) */
.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* Reduced Motion Override for Shimmer (Prevents Vestibular Discomfort) */
@media (prefers-reduced-motion: reduce) {
    .skeleton-box::after {
        animation: none !important;
        background-image: none !important;
    }
    .skeleton-box {
        opacity: 0.85;
    }
}