/**
 * Stili per placeholder delle immagini
 */

/* Stili base per placeholder dinamici */
.image-placeholder {
    transition: all 0.3s ease;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.image-placeholder:hover {
    background-color: rgba(0, 0, 0, 0.05) !important;
}

/* Stili per immagini con gestione placeholder */
img[data-placeholder] {
    transition: opacity 0.3s ease;
}

img[data-placeholder].loading {
    opacity: 0.7;
}

img[data-placeholder].error {
    opacity: 0.8;
}

/* Stili specifici per diversi tipi di placeholder */
.image-placeholder.document-placeholder {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px dashed #dee2e6;
}

.image-placeholder.thumbnail-placeholder {
    background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    border: 1px solid #ced4da;
    border-radius: 6px;
}

.image-placeholder.loading-placeholder {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border: 1px solid #e3e6ea;
    animation: pulse-loading 1.5s infinite;
}

.image-placeholder.error-placeholder {
    background: linear-gradient(135deg, #f8d7da 0%, #f1aeb5 100%);
    border: 1px solid #f5c6cb;
    animation: shake 0.5s ease-in-out;
}

/* Animazioni */
@keyframes pulse-loading {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Icone nei placeholder */
.image-placeholder i {
    transition: transform 0.3s ease;
}

.image-placeholder:hover i {
    transform: scale(1.1);
}

/* Responsive design */
@media (max-width: 768px) {
    .image-placeholder {
        padding: 15px;
        min-height: 120px;
        font-size: 0.85rem;
    }
    
    .image-placeholder i {
        font-size: 1.5rem !important;
    }
}

@media (max-width: 480px) {
    .image-placeholder {
        padding: 10px;
        min-height: 100px;
        font-size: 0.8rem;
    }
    
    .image-placeholder i {
        font-size: 1.3rem !important;
    }
}

/* Stili per thumbnail grid */
.thumbnail-grid .image-placeholder {
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.thumbnail-grid .image-placeholder:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    transform: translateY(-1px);
}

/* Stili per viewer principale */
.document-viewer .image-placeholder {
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    max-width: 100%;
    max-height: 100%;
}

/* Overlay per retry */
.image-placeholder.retry-available {
    cursor: pointer;
    position: relative;
}

.image-placeholder.retry-available::after {
    content: '🔄 Clicca per riprovare';
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-placeholder.retry-available:hover::after {
    opacity: 1;
}

/* Stili per stato di caricamento globale */
.loading-state img[data-placeholder] {
    filter: blur(1px);
    opacity: 0.8;
}

/* Personalizzazioni per aree specifiche */
.sidebar-wrapper .image-placeholder {
    border-radius: 6px;
    min-height: 80px;
    font-size: 0.8rem;
}

.sidebar-wrapper .image-placeholder i {
    font-size: 1.2rem !important;
}

.popup-container .image-placeholder {
    border-radius: 8px;
    min-height: 200px;
}

/* Stili per accessibilità */
.image-placeholder[role="img"] {
    outline: none;
}

.image-placeholder[role="img"]:focus {
    outline: 2px solid #007bff;
    outline-offset: 2px;
}