/**
 * Simracing.Fan — Resource Collection (single + archive).
 *
 * Layout Pinterest-style: 1 colonna mobile / 2 tablet / 3 desktop.
 * Mobile-first, dark mode `body.buddyx-dark-theme`.
 *
 * Pattern BEM: `.sf-collection__*`.
 */

/* ==========================================================================
   Tokens
   ========================================================================== */

.sf-collection,
.sf-collection-archive {
    --sfco-bg-card:        #ffffff;
    --sfco-bg-page:        #f7f8fa;
    --sfco-bg-elevated:    #ffffff;
    --sfco-bg-placeholder: #f0f0f0;
    --sfco-text-primary:   #1c1e21;
    --sfco-text-secondary: #65676b;
    --sfco-text-muted:     #8a8d91;
    --sfco-border:         #e4e6eb;
    --sfco-link:           #1877f2;
    --sfco-accent:         #ff3030;
    --sfco-radius:         10px;
    --sfco-radius-sm:      6px;
    --sfco-shadow-hover:   0 4px 16px rgba(0, 0, 0, 0.10);
}

body.buddyx-dark-theme .sf-collection,
body.buddyx-dark-theme .sf-collection-archive {
    --sfco-bg-card:        #232323;
    --sfco-bg-page:        #1a1a1a;
    --sfco-bg-elevated:    #2a2a2a;
    --sfco-bg-placeholder: #2e2e2e;
    --sfco-text-primary:   #e8e8e8;
    --sfco-text-secondary: #b3b3b3;
    --sfco-text-muted:     #8a8a8a;
    --sfco-border:         #2e2e2e;
    --sfco-link:           #5b9fe6;
    --sfco-shadow-hover:   0 6px 18px rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   Single Collection — header
   ========================================================================== */

.sf-collection {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px;
    color: var(--sfco-text-primary);
}

.sf-collection__cover {
    margin: 0 0 18px;
    border-radius: var(--sfco-radius);
    overflow: hidden;
    background: var(--sfco-bg-placeholder);
}

.sf-collection__cover-img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 360px;
    object-fit: cover;
}

.sf-collection__title {
    margin: 0 0 8px;
    font-size: 2rem;
    line-height: 1.15;
    font-weight: 800;
    color: var(--sfco-text-primary);
}

.sf-collection__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    color: var(--sfco-text-secondary);
    font-size: 0.875rem;
    margin-bottom: 14px;
}

.sf-collection__count {
    color: var(--sfco-text-secondary);
    font-weight: 600;
}

.sf-collection__count::before,
.sf-collection__date::before {
    content: '·';
    margin-right: 14px;
    color: var(--sfco-text-muted);
}

.sf-collection__intro {
    color: var(--sfco-text-primary);
    font-size: 1rem;
    line-height: 1.55;
    margin: 12px 0 18px;
    padding: 14px 16px;
    background: var(--sfco-bg-page);
    border-left: 3px solid var(--sfco-accent);
    border-radius: var(--sfco-radius-sm);
}

.sf-collection__description {
    margin: 12px 0 24px;
    color: var(--sfco-text-primary);
    line-height: 1.55;
}

.sf-collection__fav {
    display: inline-flex;
    align-items: center;
    margin-left: auto;
}

/* ==========================================================================
   Grid (Pinterest-style cards)
   ========================================================================== */

.sf-collection__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 24px;
}

@media ( min-width: 600px ) {
    .sf-collection__grid {
        grid-template-columns: repeat( 2, 1fr );
    }
}

@media ( min-width: 992px ) {
    .sf-collection__grid {
        grid-template-columns: repeat( 3, 1fr );
    }
}

.sf-collection__card {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--sfco-border);
    border-radius: var(--sfco-radius);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    background: var(--sfco-bg-card);
    transition: box-shadow 0.2s ease, transform 0.15s ease, border-color 0.15s ease;
}

.sf-collection__card:hover,
.sf-collection__card:focus-visible {
    box-shadow: var(--sfco-shadow-hover);
    transform: translateY( -2px );
    border-color: var(--sfco-link);
    text-decoration: none;
    color: inherit;
}

.sf-collection__card-thumb {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--sfco-bg-placeholder);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sf-collection__card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.sf-collection__card-thumb-placeholder {
    font-size: 2rem;
    color: var(--sfco-text-muted);
    opacity: 0.5;
}

.sf-collection__card-body {
    padding: 12px 16px 16px;
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sf-collection__card-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    line-height: 1.3;
    color: var(--sfco-text-primary);

    /* Tronca a 2 righe */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sf-collection__card-desc {
    font-size: 0.875rem;
    color: var(--sfco-text-secondary);
    margin: 0;
    line-height: 1.45;

    /* Tronca a 3 righe */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sf-collection__card-domain {
    font-size: 0.75rem;
    color: var(--sfco-text-muted);
    margin-top: auto;
    text-transform: lowercase;
    word-break: break-all;
}

/* ==========================================================================
   Empty state
   ========================================================================== */

.sf-collection__empty {
    padding: 40px 20px;
    text-align: center;
    color: var(--sfco-text-muted);
    background: var(--sfco-bg-page);
    border: 1px dashed var(--sfco-border);
    border-radius: var(--sfco-radius);
    margin-top: 24px;
}

/* ==========================================================================
   Archive — preview cards (nu griglia stessa struttura)
   ========================================================================== */

.sf-collection-archive {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px;
    color: var(--sfco-text-primary);
}

.sf-collection-archive__title {
    margin: 0 0 6px;
    font-size: 1.75rem;
    color: var(--sfco-text-primary);
}

.sf-collection-archive__intro {
    color: var(--sfco-text-secondary);
    font-size: 0.95rem;
    margin-bottom: 18px;
}

.sf-collection-archive__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 18px;
}

@media ( min-width: 600px ) {
    .sf-collection-archive__grid {
        grid-template-columns: repeat( 2, 1fr );
    }
}

@media ( min-width: 992px ) {
    .sf-collection-archive__grid {
        grid-template-columns: repeat( 3, 1fr );
    }
}

.sf-collection-archive__card {
    display: flex;
    flex-direction: column;
    background: var(--sfco-bg-card);
    border: 1px solid var(--sfco-border);
    border-radius: var(--sfco-radius);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: box-shadow 0.2s ease, transform 0.15s ease, border-color 0.15s ease;
}

.sf-collection-archive__card:hover,
.sf-collection-archive__card:focus-visible {
    box-shadow: var(--sfco-shadow-hover);
    transform: translateY( -2px );
    border-color: var(--sfco-link);
    text-decoration: none;
    color: inherit;
}

.sf-collection-archive__cover {
    aspect-ratio: 16 / 9;
    background: var(--sfco-bg-placeholder);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sf-collection-archive__cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.sf-collection-archive__cover-thumbs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
    height: 100%;
}

.sf-collection-archive__cover-thumbs img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sf-collection-archive__body {
    padding: 12px 16px 16px;
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sf-collection-archive__card-title {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--sfco-text-primary);
}

.sf-collection-archive__card-meta {
    display: flex;
    gap: 10px;
    align-items: center;
    color: var(--sfco-text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.sf-collection-archive__card-intro {
    color: var(--sfco-text-secondary);
    font-size: 0.875rem;
    line-height: 1.45;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sf-collection-archive__empty {
    padding: 60px 20px;
    text-align: center;
    color: var(--sfco-text-muted);
    background: var(--sfco-bg-page);
    border: 1px dashed var(--sfco-border);
    border-radius: var(--sfco-radius);
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */

@media ( prefers-reduced-motion: reduce ) {
    .sf-collection__card,
    .sf-collection-archive__card {
        transition: none;
    }
}