/**
 * CSS pour le système de Drag & Drop Universel - Version corrigée
 * Design moderne et responsive
 */

/* Variables CSS */
:root {
    --universal-primary-color: #007bff;
    --universal-success-color: #28a745;
    --universal-border-color: #dee2e6;
    --universal-background-color: #f8f9fa;
    --universal-shadow: 0 4px 20px rgba(0,0,0,0.08);
    --universal-border-radius: 12px;
    --universal-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Conteneur principal */
.universal-photo-manager {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px dashed #dee2e6;
    border-radius: 16px;
    padding: 30px;
    transition: var(--universal-transition);
    position: relative;
    overflow: hidden;
    min-height: 200px;
    box-shadow: var(--universal-shadow);
    margin-bottom: 20px;
}

.universal-photo-manager:hover {
    border-color: var(--universal-primary-color);
    box-shadow: 0 8px 30px rgba(0,123,255,0.15);
}

.universal-photo-manager.drag-over {
    border-color: var(--universal-success-color);
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    transform: scale(1.02);
}

/* Zone de dépôt */
.universal-drop-zone {
    text-align: center;
    padding: 40px 20px;
    cursor: pointer;
    transition: var(--universal-transition);
    border-radius: var(--universal-border-radius);
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(10px);
}

.universal-drop-zone:hover {
    background: rgba(255,255,255,0.9);
    transform: translateY(-2px);
}

.universal-drop-icon {
    font-size: 3rem;
    color: var(--universal-primary-color);
    margin-bottom: 15px;
    opacity: 0.8;
    transition: var(--universal-transition);
}

.universal-drop-zone:hover .universal-drop-icon {
    opacity: 1;
    transform: scale(1.1);
}

.universal-drop-zone h6 {
    color: #495057;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.universal-drop-zone p {
    color: #6c757d;
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.universal-drop-zone .btn {
    border-radius: 25px;
    padding: 10px 25px;
    font-weight: 500;
    transition: var(--universal-transition);
    box-shadow: 0 2px 10px rgba(0,123,255,0.2);
}

.universal-drop-zone .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,123,255,0.3);
}

/* Grille des photos */
.universal-photos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 20px;
    padding: 0;
    min-height: 150px;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    /* Empêcher le scroll/elastic overscroll pendant le drag sur mobile */
    overscroll-behavior: contain;
}

/* Éléments de photos */
.universal-photo-item {
    position: relative;
    background: white;
    border-radius: var(--universal-border-radius);
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: grab;
    border: 2px solid transparent;
    height: 180px;
    display: flex;
    flex-direction: column;
    /* Assurer que les événements fonctionnent */
    -webkit-user-drag: element;
    user-select: auto;
}

.universal-photo-item:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    border-color: var(--universal-primary-color);
}

/* États du drag */
.universal-photo-item.dragging {
    opacity: 0.8;
    transform: rotate(2deg) scale(1.05);
    cursor: grabbing;
    z-index: 1000;
    box-shadow: 0 15px 40px rgba(0,0,0,0.25);
    transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.universal-photo-item.drag-over {
    border-color: var(--universal-success-color) !important;
    background: rgba(40, 167, 69, 0.1);
    transform: scale(1.08);
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.3);
    transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* États de chargement */
.universal-photo-item.loading {
    background: #f8f9fa;
    border: 2px dashed #dee2e6;
    opacity: 0.7;
    position: relative;
}

.universal-photo-item.loading::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #dee2e6;
    border-top: 2px solid var(--universal-primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 10;
}

.universal-photo-item.loading .universal-photo-preview {
    opacity: 0.3;
    filter: blur(1px);
}

.universal-photo-item.loaded {
    opacity: 1;
    transition: all 0.3s ease;
}

.universal-photo-item.loaded .universal-photo-preview {
    opacity: 1;
    filter: none;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Placeholder pour le drag */
.universal-photo-item.drag-placeholder {
    border: 2px dashed var(--universal-primary-color);
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.1) 0%, rgba(0, 123, 255, 0.05) 100%);
    opacity: 0.9;
    animation: placeholderPulse 1.2s ease-in-out infinite;
    transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@keyframes placeholderPulse {
    0%, 100% { 
        opacity: 0.6;
        transform: scale(0.95);
        border-color: var(--universal-primary-color);
    }
    50% { 
        opacity: 1;
        transform: scale(1.02);
        border-color: var(--universal-success-color);
    }
}

/* Image dans les éléments de photos */
.universal-photo-preview {
    width: 100%;
    height: 120px;
    object-fit: cover;
    transition: var(--universal-transition);
    flex: 1;
}

.universal-photo-item:hover .universal-photo-preview {
    transform: scale(1.05);
}

/* Contrôles des photos */
.universal-photo-controls {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    gap: 5px;
    opacity: 0;
    transition: var(--universal-transition);
}

.universal-photo-item:hover .universal-photo-controls {
    opacity: 1;
}

.universal-control-btn {
    background: rgba(0,0,0,0.7);
    color: white;
    border: none;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--universal-transition);
    font-size: 0.75rem;
}

.universal-control-btn:hover {
    background: var(--universal-primary-color);
    transform: scale(1.1);
}

.universal-control-btn.delete:hover {
    background: #dc3545;
}

.universal-control-btn.reorder {
    cursor: grab;
}

.universal-control-btn.reorder:active {
    cursor: grabbing;
}

/* Informations sur la photo */
.universal-photo-info {
    padding: 8px;
    background: rgba(0,0,0,0.05);
    font-size: 0.75rem;
    text-align: center;
}

.universal-photo-index {
    font-weight: 600;
    color: var(--universal-primary-color);
    margin-bottom: 2px;
}

/* Compteur */
.universal-counter {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--universal-primary-color);
    color: white;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

.universal-counter.warning {
    background: #ffc107;
    color: #212529;
}

.universal-counter.danger {
    background: #dc3545;
}

/* Messages */
.universal-error-message {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    border-radius: 8px;
    padding: 10px 15px;
    margin: 10px 0;
    font-size: 0.9rem;
}

.universal-success-message {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    border-radius: 8px;
    padding: 10px 15px;
    margin: 10px 0;
    font-size: 0.9rem;
}

/* Animation pour les nouvelles photos */
.universal-photo-item.new-photo {
    animation: slideInUp 0.5s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Animation pour la réorganisation */
.universal-photo-item.reordering {
    animation: smoothReorder 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 10;
}

@keyframes smoothReorder {
    0% {
        transform: scale(1.05);
        box-shadow: 0 8px 30px rgba(0,123,255,0.3);
    }
    50% {
        transform: scale(1.02);
        box-shadow: 0 12px 40px rgba(0,123,255,0.2);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    }
}

/* Animation pour les éléments qui bougent */
.universal-photo-item.moving {
    animation: slideToPosition 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@keyframes slideToPosition {
    0% {
        opacity: 0.8;
        transform: translateY(-5px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Animation de mise à jour douce */
.universal-photos-grid.updating {
    animation: gridUpdate 0.3s ease-out;
}

@keyframes gridUpdate {
    0% {
        opacity: 0.95;
        transform: scale(0.98);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .universal-photos-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 10px;
    }
    
    .universal-photo-item {
        height: 150px;
    }
    
    .universal-photo-manager {
        padding: 20px;
    }
    
    .universal-drop-zone {
        padding: 30px 15px;
    }
}

@media (max-width: 480px) {
    .universal-photos-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .universal-photo-item {
        height: 130px;
    }
}

/* États spéciaux */
.universal-photo-manager.drag-active {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border-color: var(--universal-primary-color);
}

.universal-photo-manager.drag-active .universal-drop-zone {
    background: rgba(255,255,255,0.9);
    transform: scale(1.02);
}

/* Animation de sortie pour les photos supprimées */
.universal-photo-item.removing {
    animation: slideOutDown 0.3s ease-in forwards;
}

@keyframes slideOutDown {
    to {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
}

/* ========== SUPPORT MOBILE ET TACTILE ========== */

/* Améliorer la taille des zones tactiles pour mobile */
@media (max-width: 768px) {
    .universal-control-btn {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    
    /* Toujours afficher les contrôles sur mobile */
    .universal-photo-controls {
        opacity: 1;
        background: linear-gradient(to bottom, rgba(0,0,0,0.4) 0%, rgba(0,0,0,0) 100%);
        padding: 5px;
        border-radius: 8px 8px 0 0;
        left: 0;
        right: 0;
        top: 0;
        justify-content: flex-end;
    }
}

/* Styles spécifiques aux VRAIS appareils tactiles (pas juste les petits écrans) */
@media (hover: none) and (pointer: coarse) {
    /* Rendre les éléments plus faciles à saisir sur mobile */
    .universal-photo-item {
        cursor: pointer;
        -webkit-user-select: none;
        user-select: none;
        -webkit-touch-callout: none;
        /* Pendant l'interaction, on gère le scroll nous-mêmes côté JS */
        touch-action: manipulation;
    }
    
    /* Empêcher la sélection de texte lors du drag UNIQUEMENT pendant le drag */
    .universal-photo-item.dragging,
    .universal-photo-item.touch-dragging {
        -webkit-user-select: none;
        user-select: none;
    }
    
    .universal-photo-item.dragging *,
    .universal-photo-item.touch-dragging * {
        -webkit-user-select: none;
        user-select: none;
        pointer-events: none;
    }
    
    .universal-photo-item.dragging .universal-control-btn,
    .universal-photo-item.touch-dragging .universal-control-btn {
        pointer-events: auto;
    }
}

/* Fantôme de drag tactile */
.touch-ghost {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.85;
    transform: scale(1.15) rotate(3deg);
    box-shadow: 0 15px 50px rgba(0,0,0,0.4);
    border: 3px solid var(--universal-primary-color);
    border-radius: var(--universal-border-radius);
    transition: none;
    filter: brightness(1.1);
}

/* Animation subtile pour le fantôme */
.touch-ghost::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0,123,255,0.2) 0%, rgba(0,123,255,0.05) 100%);
    border-radius: inherit;
    pointer-events: none;
}

/* Indicateur visuel pendant le drag tactile */
.universal-photo-item.dragging.touch-dragging {
    opacity: 0.3;
    transform: scale(0.95);
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

/* Zone de drop améliorée pour mobile */
@media (max-width: 768px) {
    .universal-photo-item.drag-over {
        transform: scale(1.15);
        border-width: 3px;
        box-shadow: 0 10px 30px rgba(40, 167, 69, 0.4);
    }
    
    /* Feedback visuel plus prononcé sur mobile */
    .universal-photo-item.drag-over::before {
        content: '↓';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        font-size: 2.5rem;
        color: var(--universal-success-color);
        z-index: 10;
        animation: dropHerePulse 0.6s ease-in-out infinite;
        text-shadow: 0 2px 10px rgba(0,0,0,0.3);
    }
}

@keyframes dropHerePulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.7;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 1;
    }
}

/* Améliorer la visibilité du feedback tactile */
@media (hover: none) and (pointer: coarse) {
    /* Cibler spécifiquement les appareils tactiles */
    .universal-photo-item:active {
        opacity: 0.9;
        transform: scale(0.98);
    }
    
    .universal-control-btn:active {
        transform: scale(0.95);
        background: var(--universal-primary-color);
    }
    
    .universal-drop-zone:active {
        transform: scale(0.98);
        background: rgba(255,255,255,1);
    }
}

/* Prévenir les problèmes de scroll pendant le drag sur mobile */
body.touch-dragging {
    /* Empêcher le scroll sans changer la position - évite le flash visuel */
    overflow: hidden !important;
    touch-action: none !important;
    -webkit-overflow-scrolling: auto !important;
    /* Pas de transition pour éviter les effets visuels */
    transition: none !important;
}

/* Désactiver le scroll sur le HTML aussi */
html.touch-dragging {
    overflow: hidden !important;
    touch-action: none !important;
}

/* Indicateur de longue pression pour démarrer le drag */
.universal-photo-item.touch-hold-indicator {
    animation: touchHoldPulse 0.5s ease-in-out;
}

@keyframes touchHoldPulse {
    0% {
        transform: scale(1);
        box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 8px 25px rgba(0,123,255,0.3);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    }
}