/* ===== STYLES SPÉCIFIQUES AUX LIVRES BLANCS ===== */

/* Filtres Livres Blancs */
.whitepaper-filters {
    padding: 2rem 0;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.whitepaper-filters .filters-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.whitepaper-filters .filter-group h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.whitepaper-filters .filter-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.whitepaper-filters .filter-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray);
    padding: 0.5rem 1.25rem;
    border-radius: 2rem;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.whitepaper-filters .filter-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--light);
}

.whitepaper-filters .filter-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.whitepaper-filters .sort-select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--light);
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    min-width: 150px;
    cursor: pointer;
    outline: none;
}

/* Section Livres Blancs */
.whitepapers-section {
    padding: 4rem 0;
}

.whitepapers-grid {
    display: grid;
    gap: 2rem;
    margin-bottom: 3rem;
}

/* Cartes Livres Blancs */
.whitepaper-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    display: grid;
    grid-template-columns: 200px 1fr;
    position: relative;
}

.whitepaper-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.whitepaper-card.featured {
    grid-column: 1 / -1;
    border: 2px solid var(--primary);
}

.whitepaper-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 2;
}

.whitepaper-image {
    position: relative;
    background: var(--gradient-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.whitepaper-image .image-placeholder {
    font-size: 4rem;
    color: var(--primary);
    opacity: 0.5;
}

.whitepaper-content {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
}

.whitepaper-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.whitepaper-category {
    background: rgba(0, 212, 170, 0.1);
    color: var(--primary);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: 600;
}

.whitepaper-date {
    color: var(--gray);
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.whitepaper-date::before {
    content: '📅';
}

.whitepaper-title {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--light);
}

.whitepaper-excerpt {
    color: var(--gray);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex: 1;
}

.whitepaper-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 1.5rem;
    padding: 1rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray);
    font-size: 0.9rem;
    font-weight: 500;
}

.stat i {
    color: var(--primary);
    width: 16px;
}

.whitepaper-features {
    margin-bottom: 2rem;
}

.whitepaper-features h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--light);
}

.whitepaper-features ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.whitepaper-features li {
    padding: 0.5rem 0;
    color: var(--gray);
    position: relative;
    padding-left: 1.5rem;
    font-size: 0.9rem;
    line-height: 1.4;
}

.whitepaper-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 600;
}

.whitepaper-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.whitepaper-actions .btn {
    flex: 1;
    min-width: 160px;
    justify-content: center;
}

/* Newsletter Spéciale Livres Blancs */
.whitepaper-newsletter {
    padding: 4rem 0;
    background: rgba(255, 255, 255, 0.02);
}

.whitepaper-newsletter .newsletter-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    padding: 3rem;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    max-width: 1000px;
    margin: 0 auto;
}

.whitepaper-newsletter .newsletter-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.whitepaper-newsletter .newsletter-content p {
    color: var(--gray);
    margin-bottom: 2rem;
    line-height: 1.6;
    font-size: 1.1rem;
}

.whitepaper-newsletter .newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1rem;
}

.whitepaper-newsletter .newsletter-form input,
.whitepaper-newsletter .newsletter-form select {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--light);
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.whitepaper-newsletter .newsletter-form input::placeholder,
.whitepaper-newsletter .newsletter-form select {
    color: var(--gray);
}

.whitepaper-newsletter .newsletter-form input:focus,
.whitepaper-newsletter .newsletter-form select:focus {
    border-color: var(--primary);
}

.whitepaper-newsletter .newsletter-form select option {
    background: var(--dark-light);
    color: var(--light);
}

.whitepaper-newsletter .newsletter-content small {
    color: var(--gray);
    font-size: 0.8rem;
}

.whitepaper-newsletter .newsletter-visual {
    text-align: center;
}

.whitepaper-newsletter .newsletter-visual i {
    font-size: 6rem;
    color: var(--primary);
    opacity: 0.3;
}

/* Pagination */
.whitepapers-section .pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.whitepapers-section .pagination-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.whitepapers-section .pagination-btn:hover:not(.disabled):not(.active) {
    background: rgba(255, 255, 255, 0.1);
    color: var(--light);
}

.whitepapers-section .pagination-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.whitepapers-section .pagination-btn.disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Animations */
.whitepaper-card {
    opacity: 0;
    transform: translateY(30px);
    animation: whitepaperAppear 0.6s ease forwards;
}

@keyframes whitepaperAppear {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Délais d'animation pour les cartes */
.whitepaper-card:nth-child(1) { animation-delay: 0.1s; }
.whitepaper-card:nth-child(2) { animation-delay: 0.2s; }
.whitepaper-card:nth-child(3) { animation-delay: 0.3s; }
.whitepaper-card:nth-child(4) { animation-delay: 0.4s; }
.whitepaper-card:nth-child(5) { animation-delay: 0.5s; }

/* États de filtrage */
.whitepaper-card.hidden {
    display: none !important;
}

.whitepaper-card.visible {
    display: grid !important;
}

/* Badges de catégorie colorés */
.whitepaper-category[data-category="strategie"] {
    background: rgba(0, 212, 170, 0.1);
    color: var(--primary);
}

.whitepaper-category[data-category="reglementation"] {
    background: rgba(9, 132, 227, 0.1);
    color: var(--secondary);
}

.whitepaper-category[data-category="technique"] {
    background: rgba(108, 92, 231, 0.1);
    color: var(--accent);
}

.whitepaper-category[data-category="sectoriel"] {
    background: rgba(253, 203, 110, 0.1);
    color: var(--warning);
}

.whitepaper-category[data-category="innovation"] {
    background: rgba(155, 89, 182, 0.1);
    color: #9b59b6;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .whitepaper-card {
        grid-template-columns: 150px 1fr;
    }
    
    .whitepaper-content {
        padding: 2rem;
    }
    
    .whitepaper-stats {
        gap: 1.5rem;
    }
    
    .whitepaper-newsletter .newsletter-card {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .whitepaper-filters .filters-container {
        flex-direction: column;
        align-items: stretch;
        gap: 1.5rem;
    }
    
    .whitepaper-filters .filter-buttons {
        justify-content: center;
    }
    
    .whitepaper-card {
        grid-template-columns: 1fr;
    }
    
    .whitepaper-image {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        height: 150px;
    }
    
    .whitepaper-image .image-placeholder {
        font-size: 3rem;
    }
    
    .whitepaper-content {
        padding: 1.5rem;
    }
    
    .whitepaper-title {
        font-size: 1.3rem;
    }
    
    .whitepaper-stats {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .whitepaper-actions {
        flex-direction: column;
    }
    
    .whitepaper-actions .btn {
        min-width: auto;
    }
    
    .whitepaper-newsletter .newsletter-card {
        padding: 2rem 1.5rem;
    }
    
    .whitepaper-newsletter .newsletter-content h3 {
        font-size: 1.5rem;
    }
    
    .whitepaper-newsletter .newsletter-visual i {
        font-size: 4rem;
    }
}

@media (max-width: 480px) {
    .whitepaper-filters .filter-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .whitepaper-filters .filter-btn {
        text-align: center;
    }
    
    .whitepaper-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .whitepaper-features li {
        font-size: 0.8rem;
    }
    
    .whitepaper-newsletter .newsletter-form {
        gap: 0.75rem;
    }
}

/* Indicateur de popularité */
.whitepaper-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
}

.whitepaper-card.featured::after {
    opacity: 1;
}

/* Compteur de téléchargements animé */
.download-count {
    position: relative;
}

.download-count::after {
    content: '+';
    position: absolute;
    right: -15px;
    top: 0;
    font-size: 0.7em;
    color: var(--primary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}