/**
 * Skeleton Styles - Author Portal
 * Стили для skeleton-загрузчиков
 */

/* Base Skeleton */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-bg-tertiary) 25%,
        var(--color-bg-secondary) 50%,
        var(--color-bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

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

/* Skeleton Types */
.skeleton--text {
    height: 16px;
    width: 100%;
    margin-bottom: 8px;
}

.skeleton--title {
    height: 24px;
    width: 70%;
    margin-bottom: 12px;
}

.skeleton--avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.skeleton--avatar-lg {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
}

.skeleton--image {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: var(--radius-lg);
}

.skeleton--cover {
    width: 100%;
    aspect-ratio: 2/3;
    border-radius: var(--radius-lg);
}

.skeleton--button {
    height: 40px;
    width: 120px;
    border-radius: var(--radius-md);
}

.skeleton--badge {
    height: 24px;
    width: 60px;
    border-radius: var(--radius-full);
}

/* Skeleton Card */
.skeleton-card {
    overflow: hidden;
}

.skeleton-card .card__body {
    padding: var(--spacing-4);
}

/* Skeleton Book Card */
.skeleton-book-card {
    display: flex;
    flex-direction: column;
}

/* Skeleton Article Card */
.skeleton-article-card {
    padding: var(--spacing-4);
}

/* Skeleton List Item */
.skeleton-list-item {
    border-bottom: 1px solid var(--color-border-light);
}

.skeleton-list-item:last-child {
    border-bottom: none;
}

/* Loading Container */
.is-loading {
    position: relative;
    /*min-height: 100px;*/
}

/* Fade In Animation */
.is-loaded {
    animation: fade-in 0.3s ease-out;
}

@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Skeleton Grid */
.skeleton-grid {
    display: grid;
    gap: var(--spacing-6);
}

.skeleton-grid--2 { grid-template-columns: repeat(2, 1fr); }
.skeleton-grid--3 { grid-template-columns: repeat(3, 1fr); }
.skeleton-grid--4 { grid-template-columns: repeat(4, 1fr); }
.skeleton-grid--5 { grid-template-columns: repeat(5, 1fr); }

@media (max-width: 992px) {
    .skeleton-grid--4 { grid-template-columns: repeat(3, 1fr); }
    .skeleton-grid--5 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .skeleton-grid--3 { grid-template-columns: repeat(2, 1fr); }
    .skeleton-grid--4 { grid-template-columns: repeat(2, 1fr); }
    .skeleton-grid--5 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .skeleton-grid--2 { grid-template-columns: 1fr; }
    .skeleton-grid--3 { grid-template-columns: 1fr; }
    .skeleton-grid--4 { grid-template-columns: 1fr; }
    .skeleton-grid--5 { grid-template-columns: 1fr; }
}