/* Améliorations pour les cartes existantes */
.card {
    border: none;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: white;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.card-header {
    padding: 0;
    border-bottom: 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
    overflow: hidden;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6, #10b981);
    background-size: 200% 100%;
    animation: gradient-shift 3s ease infinite;
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.card-header iframe {
    width: 100%;
    height: 400px;
    border: none;
    transition: transform 0.3s ease;
}

.card:hover .card-header iframe {
    transform: scale(1.02);
}

.card-header h4 {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0;
    padding: 20px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    transform: translateY(0%);
    transition: transform 0.3s ease;
}

.card:hover .card-header h4 {
    transform: translateY(0);
}

.card-footer {
    padding: 20px;
    background: white;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    gap: 12px;
    margin-top: auto;
}

/* Amélioration des boutons */
.download-button {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 20px;
    background: linear-gradient(135deg, #ff3002 0%, #ff3002 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.35);
    background: linear-gradient(135deg, #ff3002 0%, #f64923 100%);
    color: white;
    text-decoration: none;
}

.download-button svg {
    transition: transform 0.3s ease;
}

.download-button:hover svg {
    transform: translateY(2px);
}

/* Badge pour type de document */
.document-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    color: #1e40af;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 2;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* Indicateur de chargement élégant */
.pdf-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #6b7280;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #e5e7eb;
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

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

/* Amélioration du conteneur */
.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    padding: 20px 0;
}

/* Effet de brillance au survol */
.card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: left 0.7s ease;
}

.card:hover::after {
    left: 100%;
}

/* Responsive */
@media (max-width: 768px) {
    .cards-container {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 20px;
    }

    .card-header iframe {
        height: 300px;
    }

    .card-footer {
        flex-direction: column;
    }

    .download-button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .cards-container {
        grid-template-columns: 1fr;
    }
}

/* Animation d'apparition des cartes */
.card {
    animation: card-appear 0.5s ease-out forwards;
    opacity: 0;
    transform: translateY(20px);
}

@keyframes card-appear {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Délai d'animation pour chaque carte */
.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }
.card:nth-child(5) { animation-delay: 0.5s; }
.card:nth-child(6) { animation-delay: 0.6s; }
.card:nth-child(7) { animation-delay: 0.7s; }
.card:nth-child(8) { animation-delay: 0.8s; }
.card:nth-child(9) { animation-delay: 0.9s; }
.card:nth-child(10) { animation-delay: 1s; }

/* Amélioration des iframes avec fallback */
.pdf-iframe-wrapper {
    position: relative;
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.pdf-fallback {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
    padding: 30px;
    background: inherit;
}

.pdf-fallback-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.9;
}

.pdf-fallback-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
}

.pdf-fallback-text {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 20px;
}