/**
 * Library Component - Styles pour la bibliothèque musicale
 * 
 * Ce fichier contient les styles pour:
 * - Grilles de tracks, artistes et albums
 * - Cartes de contenu
 * - Navigation et filtres
 * - États de chargement et erreurs
 * 
 * @module assets/css/components/library
 * @version 1.0.0
 */

/* ===== Header de la bibliothèque ===== */
.library-header {
    margin-bottom: var(--music-spacing-lg);
    padding-bottom: var(--music-spacing-md);
    border-bottom: 1px solid var(--music-border);
}

.library-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--music-text-primary);
    margin: 0 0 var(--music-spacing-xs) 0;
}

.library-count {
    font-size: 0.875rem;
    color: var(--music-text-secondary);
    margin: 0;
}

/* ===== Grilles ===== */
.tracks-grid {
    display: grid;
    gap: var(--music-spacing-md);
    grid-template-columns: 1fr;
}

.artists-grid,
.albums-grid {
    display: grid;
    gap: var(--music-spacing-lg);
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}

/* ===== Cartes de tracks ===== */
.track-card {
    background: var(--music-bg-card);
    border: 1px solid var(--music-border);
    border-radius: var(--music-radius);
    padding: var(--music-spacing-md);
    display: flex;
    align-items: center;
    gap: var(--music-spacing-md);
    cursor: pointer;
    transition: all var(--music-transition);
    position: relative;
}

.track-card:hover {
    background: var(--music-bg-hover);
    transform: translateY(-2px);
    box-shadow: var(--music-shadow-lg);
    border-color: var(--music-primary);
}

.track-card.playing {
    border-color: var(--music-primary);
    background: linear-gradient(135deg, var(--music-bg-card) 0%, rgba(0, 212, 255, 0.1) 100%);
}

.track-cover {
    width: 56px;
    height: 56px;
    border-radius: var(--music-radius-sm);
    object-fit: cover;
    background: var(--music-bg-secondary);
    flex-shrink: 0;
}

.track-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.track-title {
    font-weight: 600;
    color: var(--music-text-primary);
    font-size: 0.9375rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
}

.track-artist {
    font-size: 0.8125rem;
    color: var(--music-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-duration {
    font-size: 0.8125rem;
    color: var(--music-text-muted);
    flex-shrink: 0;
    margin-right: var(--music-spacing-sm);
}

.track-actions {
    display: flex;
    gap: var(--music-spacing-xs);
    opacity: 0;
    transition: opacity var(--music-transition);
}

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

.track-action-btn {
    background: var(--music-bg-secondary);
    border: 1px solid var(--music-border);
    color: var(--music-text-secondary);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--music-transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    padding: 0;
}

.track-action-btn:hover {
    background: var(--music-primary);
    border-color: var(--music-primary);
    color: white;
    transform: scale(1.1);
}

.track-action-btn.favorite.active {
    background: #ef4444;
    border-color: #ef4444;
    color: white;
}

.track-action-btn.play {
    background: var(--music-primary);
    border-color: var(--music-primary);
    color: white;
}

.track-action-btn.play:hover {
    background: var(--music-secondary);
    border-color: var(--music-secondary);
}

/* ===== Cartes d'artistes ===== */
.artist-card {
    background: var(--music-bg-card);
    border: 1px solid var(--music-border);
    border-radius: var(--music-radius);
    padding: var(--music-spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--music-transition);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.artist-card:hover {
    background: var(--music-bg-hover);
    transform: translateY(-4px);
    box-shadow: var(--music-shadow-lg);
    border-color: var(--music-primary);
}

.artist-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--music-primary) 0%, var(--music-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--music-spacing-md);
    flex-shrink: 0;
}

.artist-name {
    font-weight: 600;
    color: var(--music-text-primary);
    font-size: 1rem;
    margin-bottom: var(--music-spacing-xs);
    word-break: break-word;
}

.artist-stats {
    font-size: 0.8125rem;
    color: var(--music-text-secondary);
}

/* ===== Cartes d'albums ===== */
.album-card {
    background: var(--music-bg-card);
    border: 1px solid var(--music-border);
    border-radius: var(--music-radius);
    padding: var(--music-spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--music-transition);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.album-card:hover {
    background: var(--music-bg-hover);
    transform: translateY(-4px);
    box-shadow: var(--music-shadow-lg);
    border-color: var(--music-primary);
}

.album-cover-large {
    width: 140px;
    height: 140px;
    border-radius: var(--music-radius);
    margin-bottom: var(--music-spacing-md);
    background: var(--music-bg-secondary);
    object-fit: cover;
    flex-shrink: 0;
}

.album-name {
    font-weight: 600;
    color: var(--music-text-primary);
    font-size: 1rem;
    margin-bottom: var(--music-spacing-xs);
    word-break: break-word;
}

.album-artist {
    font-size: 0.875rem;
    color: var(--music-text-secondary);
    margin-bottom: var(--music-spacing-xs);
}

.album-stats {
    font-size: 0.8125rem;
    color: var(--music-text-muted);
}

/* ===== États vides ===== */
.empty-state {
    text-align: center;
    padding: var(--music-spacing-xl) var(--music-spacing-lg);
    color: var(--music-text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--music-spacing-lg);
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--music-text-primary);
    margin: 0 0 var(--music-spacing-md) 0;
}

.empty-state-text {
    font-size: 1rem;
    margin: 0 0 var(--music-spacing-lg) 0;
}

.empty-state-hint {
    font-size: 0.95rem;
    margin: var(--music-spacing-lg) 0 0 0;
    padding: var(--music-spacing-md);
    background: rgba(0, 212, 255, 0.1);
    border-radius: 8px;
    color: var(--music-text-primary);
    line-height: 1.6;
}

.empty-state-hint strong {
    color: var(--music-primary);
}

.btn-retry {
    background: var(--music-primary);
    border: none;
    color: white;
    padding: var(--music-spacing-md) var(--music-spacing-xl);
    border-radius: var(--music-radius);
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 600;
    transition: all var(--music-transition);
}

.btn-retry:hover {
    background: var(--music-secondary);
    transform: translateY(-2px);
    box-shadow: var(--music-shadow-lg);
}

/* ===== États de chargement ===== */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--music-spacing-xl) var(--music-spacing-lg);
    color: var(--music-text-secondary);
    min-height: 300px;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--music-border);
    border-top-color: var(--music-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--music-spacing-lg);
}

@keyframes spin {
    to { 
        transform: rotate(360deg); 
    }
}

.loading-state p {
    font-size: 1rem;
    margin: 0;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .tracks-grid {
        gap: var(--music-spacing-sm);
    }

    .track-card {
        padding: var(--music-spacing-sm);
        gap: var(--music-spacing-sm);
    }

    .track-cover {
        width: 48px;
        height: 48px;
    }

    .track-title {
        font-size: 0.875rem;
    }

    .track-artist {
        font-size: 0.75rem;
    }

    .track-duration {
        display: none;
    }

    .track-actions {
        opacity: 1;
        flex-direction: column;
        gap: 4px;
    }

    .track-action-btn {
        width: 32px;
        height: 32px;
        font-size: 0.75rem;
    }

    .artists-grid,
    .albums-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: var(--music-spacing-md);
    }

    .artist-avatar {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }

    .album-cover-large {
        width: 100px;
        height: 100px;
    }

    .library-header h2 {
        font-size: 1.25rem;
    }

    .empty-state-icon {
        font-size: 3rem;
    }

    .empty-state-title {
        font-size: 1.25rem;
    }

    .empty-state-text {
        font-size: 0.875rem;
    }
}

@media (max-width: 480px) {
    .artists-grid,
    .albums-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }

    .artist-avatar {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    .album-cover-large {
        width: 80px;
        height: 80px;
    }

    .artist-name,
    .album-name {
        font-size: 0.875rem;
    }

    .artist-stats,
    .album-artist,
    .album-stats {
        font-size: 0.75rem;
    }
}

/* ===== Favoris ===== */
.favorite-track .track-added-date {
    font-size: 0.75rem;
    color: var(--music-text-muted);
    margin-top: 2px;
}

.sort-buttons {
    display: flex;
    gap: var(--music-spacing-sm);
    margin-bottom: var(--music-spacing-lg);
    flex-wrap: wrap;
}

.sort-btn {
    background: var(--music-bg-card);
    border: 1px solid var(--music-border);
    color: var(--music-text-secondary);
    padding: var(--music-spacing-sm) var(--music-spacing-md);
    border-radius: var(--music-radius);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--music-transition);
    display: flex;
    align-items: center;
    gap: var(--music-spacing-xs);
}

.sort-btn:hover {
    background: var(--music-bg-hover);
    border-color: var(--music-primary);
    color: var(--music-text-primary);
}

.sort-btn.active {
    background: var(--music-primary);
    border-color: var(--music-primary);
    color: white;
}

/* ===== Notifications ===== */
.notification {
    position: fixed;
    top: 80px;
    right: 20px;
    background: var(--music-bg-card);
    border: 1px solid var(--music-border);
    border-radius: var(--music-radius);
    padding: var(--music-spacing-md) var(--music-spacing-lg);
    box-shadow: var(--music-shadow-lg);
    z-index: 10000;
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s ease;
    max-width: 300px;
    font-size: 0.9375rem;
    font-weight: 500;
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
}

.notification-success {
    border-left: 4px solid var(--music-success);
    color: var(--music-success);
}

.notification-error {
    border-left: 4px solid var(--music-error);
    color: var(--music-error);
}

.notification-info {
    border-left: 4px solid var(--music-primary);
    color: var(--music-primary);
}

/* ===== Responsive Favoris ===== */
@media (max-width: 768px) {
    .sort-buttons {
        gap: var(--music-spacing-xs);
    }

    .sort-btn {
        padding: var(--music-spacing-xs) var(--music-spacing-sm);
        font-size: 0.8125rem;
    }

    .favorite-track .track-added-date {
        display: none;
    }

    .notification {
        top: 60px;
        right: 10px;
        left: 10px;
        max-width: none;
        font-size: 0.875rem;
    }
}