/* Variables */
:root {
    --primary-rgb: 66, 133, 189; /* Version plus claire du bleu */
    --primary-light-rgb: 98, 160, 212;
}

/* Section Publications */
.publications-section {
    padding: 100px 0;
    background: #f9fbff;
    min-height: 70vh;
}

.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    padding: 0 1rem;
}

.publication-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    cursor: pointer;
}

.publication-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0.03);
    position: relative;
    transform: translateZ(0);
    backface-visibility: hidden;
    will-change: transform, box-shadow;
    cursor: pointer;
}

.publication-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(66, 133, 189, 0.15);
}

.publication-preview {
    height: 320px;
    background: var(--white);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.pdf-preview-container {
    position: relative;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pdf-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    border: 2px dashed #cbd5e1;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.publication-card:hover .pdf-placeholder {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
    border-color: var(--primary);
    transform: scale(1.02);
}

.pdf-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    margin: 1rem 0 0.5rem 0;
    line-height: 1.3;
}

.pdf-date {
    font-size: 0.85rem;
    color: var(--gray-600);
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.pdf-date i {
    color: var(--primary);
    opacity: 0.7;
}

.pdf-icon-elegant {
    font-size: 3.5rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.publication-card:hover .pdf-icon-elegant {
    color: var(--primary-dark);
    transform: scale(1.1);
}

/* Styles pour iframe et overlay */
.pdf-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    padding: 1rem;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.publication-card:hover .pdf-overlay {
    opacity: 1;
}

.pdf-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: white;
    font-size: 0.85rem;
}

.file-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.file-date i {
    opacity: 0.8;
}

.pdf-fallback {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    border: 2px dashed #cbd5e1;
    border-radius: 12px;
}

/* iframe styles */
iframe {
    background: #f8fafc;
    transition: opacity 0.3s ease;
    /* Limitation visuelle pour simuler la page 1 */
    overflow: hidden;
}

iframe:not([src]) {
    opacity: 0.5;
}

/* Style pour limiter l'affichage PDF */
.pdf-preview-container iframe {
    /* Technique pour limiter l'affichage visible */
    max-height: 320px;
    object-fit: cover;
    object-position: top;
}





.publication-info {
    padding: 1.5rem;
    border-top: none;
    background: linear-gradient(to bottom, rgba(249,250,251,0.5) 0%, rgba(255,255,255,1) 100%);
}

/* Style pour l'icône d'ouverture */
.open-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 0.5rem;
    color: rgb(var(--primary-rgb));
    font-size: 0.85rem;
    opacity: 0.8;
    transition: all 0.3s ease;
    vertical-align: middle;
    background-color: rgba(var(--primary-light-rgb), 0.15);
    width: 24px;
    height: 24px;
    border-radius: 50%;
}

.publication-card:hover .open-icon {
    opacity: 1;
    transform: translateY(-2px);
    background-color: rgb(var(--primary-light-rgb));
    color: white;
}

/* Suppression des éléments superflus */
.pdf-overlay {
    display: none;
}

.publication-description {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.5;
    margin-bottom: 1.5rem;
    text-align: center;
    font-style: italic;
}

/* Ajustement si pas de description */
.publication-info .publication-actions {
    margin-top: 1.5rem;
}

.publication-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1rem;
    line-height: 1.3;
    position: relative;
    padding-bottom: 0.8rem;
    text-align: center;
}

.publication-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
    opacity: 0.5;
}

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

.btn-pdf {
    flex: 1;
    padding: 0.9rem 1.2rem;
    text-align: center;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.2);
}

.btn-pdf:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-pdf-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-pdf-secondary:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.page-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 150px 0 80px;
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.page-hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.05);
    opacity: 0.1;
}

.page-hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    margin-bottom: 1rem;
    position: relative;
}

.publication-category {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--primary);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 10;
}



@media (max-width: 768px) {
    .publications-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 2rem;
    }
    
    .publication-preview {
        height: 300px;
    }
    
    .publication-info {
        padding: 1.5rem;
    }
    
    .publication-actions {
        flex-direction: column;
        gap: 0.8rem;
    }
    
    .pdf-info {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
}