/* ========================================
   Project Card & Empty State
   Shared component for model-builder hub and data pages
   ======================================== */

/* === Project Grid === */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: var(--space-xl);
    width: 100%;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

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

.project-card {
    background: var(--bg-surface-2);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-card);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                border-color var(--transition-normal),
                box-shadow var(--transition-normal);
    position: relative;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    animation: cardFadeUp 0.3s cubic-bezier(0.16, 1, 0.3, 1) backwards;
    animation-delay: calc(var(--card-index, 0) * 0.02s);
}

.project-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-card-hover);
    box-shadow: 0 4px var(--space-xl) rgba(0, 0, 0, 0.5),
                0 0 0 1px rgba(57, 151, 151, 0.1);
}

.project-card:active {
    transform: translateY(0);
    transition-duration: 0.05s;
}

.project-card-new {
    border-style: dashed;
    border-color: var(--border-section);
}

.project-card-new:hover {
    border-color: var(--primary);
    background: var(--bg-hover);
    box-shadow: var(--shadow-glow);
}

.project-card-preview {
    height: 200px;
    flex-shrink: 0;
    background: var(--bg-panel);
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 2px;
    padding: 2px;
    overflow: hidden;
}

.project-card-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-card-preview .thumb-placeholder {
    background: var(--bg-card);
}

.project-card-preview-new {
    display: flex;
    align-items: center;
    justify-content: center;
}

.new-project-icon {
    width: 48px;
    height: 48px;
    color: var(--text-subtle);
    transition: color var(--transition-fast);
}

.project-card-new:hover .new-project-icon {
    color: var(--primary);
}

.project-card-info {
    padding: var(--space-md);
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.project-card-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-high);
    margin-bottom: var(--space-xs);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
}

.project-card-stats {
    font-size: var(--font-size-sm);
    color: var(--text-subtle);
}

.project-card-desc {
    font-size: var(--font-size-sm);
    color: var(--text-subtle);
}

.project-card-owner {
    font-size: 0.75rem;
    color: var(--text-medium);
    margin-top: 2px;
}

.project-card-actions {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    opacity: 0;
    transition: opacity var(--transition-normal);
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    border-radius: 6px;
    padding: 4px;
    display: flex;
    gap: 2px;
}

.project-card-actions .btn {
    padding: 6px 8px;
}

.project-card-actions .btn svg {
    width: 18px;
    height: 18px;
}

.project-card:hover .project-card-actions {
    opacity: 1;
}

/* === Empty State === */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    text-align: center;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    color: var(--text-subtle);
}

.empty-state svg {
    opacity: 0.5;
    margin-bottom: var(--space-lg);
    color: var(--text-subtle);
}

.empty-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-lg);
    color: var(--primary);
    opacity: 0.6;
}

.empty-title, .empty-state h5 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-high);
    margin-bottom: var(--space-sm);
}

.empty-text, .empty-state p {
    font-size: var(--font-size-md);
    color: var(--text-subtle);
    margin-bottom: var(--space-lg);
    max-width: 400px;
}

/* === Responsive === */
@media (max-width: 767px) {
    .project-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: var(--space-md);
    }
    .project-card {
        min-height: 220px;
    }
    .project-card-preview {
        height: 160px;
    }
    /* Show card actions on touch */
    .project-card-actions {
        opacity: 1;
    }
    .project-card-actions .btn {
        min-width: 44px;
        min-height: 44px;
    }
}

@media (max-width: 480px) {
    .project-grid {
        grid-template-columns: 1fr;
    }
    .project-card-preview {
        height: 160px;
    }
}