/**
 * Preview Loading States CSS
 * Async preview system loading animations and states
 * Version: 1.0.0
 */

/* ========================================
   Container Styles
   ======================================== */

.async-preview-container {
    position: relative;
    width: 100%;
    height: auto;
    overflow: hidden;
}

.async-preview-container.preview-loading {
    background: rgba(243, 244, 246, 0.5);
}

/* ========================================
   Skeleton Loading State
   ======================================== */

.preview-skeleton {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    min-height: 200px;
}

.preview-skeleton-image {
    position: relative;
    width: 100%;
    max-width: 100%;
    aspect-ratio: 16 / 9;
    background: rgba(229, 231, 235, 0.5);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    color: #3b82f6;
    z-index: 1;
}

.preview-skeleton-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: #6b7280;
    font-weight: 500;
}

.preview-skeleton-text i {
    font-size: 1rem;
}

/* Status-specific colors */
.preview-skeleton[data-status="pending"] .preview-skeleton-text {
    color: #6b7280;
}

.preview-skeleton[data-status="processing"] .preview-skeleton-text {
    color: #3b82f6;
}

/* ========================================
   Error State
   ======================================== */

.preview-error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    min-height: 200px;
    text-align: center;
}

.preview-error-icon {
    font-size: 3rem;
    color: #ef4444;
}

.preview-error-text {
    color: #6b7280;
}

.preview-error-text strong {
    display: block;
    color: #111827;
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.preview-error-text p {
    font-size: 0.875rem;
    margin: 0;
}

.preview-retry-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: #3b82f6;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preview-retry-btn:hover {
    background: #2563eb;
    transform: translateY(-1px);
}

.preview-retry-btn:active {
    transform: translateY(0);
}

/* ========================================
   Completed State
   ======================================== */

.async-preview-container.preview-completed {
    background: transparent;
}

.preview-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    display: block;
}

.preview-image.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .preview-skeleton {
        padding: 1.5rem;
        min-height: 150px;
    }

    .preview-skeleton-image {
        max-width: 250px;
    }

    .preview-spinner {
        font-size: 1.5rem;
    }

    .preview-error-state {
        padding: 1.5rem;
        min-height: 150px;
    }

    .preview-error-icon {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .preview-skeleton {
        padding: 1rem;
        min-height: 120px;
    }

    .preview-skeleton-image {
        max-width: 200px;
    }

    .preview-skeleton-text {
        font-size: 0.75rem;
    }

    .preview-error-text strong {
        font-size: 0.875rem;
    }

    .preview-error-text p {
        font-size: 0.75rem;
    }

    .preview-retry-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.75rem;
    }
}

/* ========================================
   Dark Mode Support (Optional)
   ======================================== */

@media (prefers-color-scheme: dark) {
    .async-preview-container.preview-loading {
        background: rgba(31, 41, 55, 0.5);
    }

    .preview-skeleton-image {
        background: rgba(55, 65, 81, 0.5);
    }

    .preview-skeleton-text {
        color: #9ca3af;
    }

    .preview-error-text {
        color: #9ca3af;
    }

    .preview-error-text strong {
        color: #f3f4f6;
    }
}
