/* ===== CONFERENCES.CSS ===== */

/* Variables CSS */
:root {
    --color-primary: #A7001E;
    --color-primary-dark: #1a252f;
    --color-secondary: #e74c3c;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-white: #ffffff;
    --color-light-gray: #f5f7fa;
    --color-border: #e1e5eb;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --border-radius: 8px;
    --transition: 0.3s ease;
    --navbar-height: 80px; /* Ajoutez cette variable */
}

/* Page conférences */
.conferences-page {
    background-color: var(--color-white);
    padding-top: var(--navbar-height); /* Compense la navbar fixe */
}

/* Section Carrousel Conférence - FULLSCREEN */
.conference-carousel-section {
    width: 100%;
    height: calc(100vh - var(--navbar-height)); /* Soustrait la hauteur de la navbar */
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    margin-bottom: var(--spacing-xl);
}

.conference-carousel-container {
    width: 100%;
    height: 100%;
    position: relative;
}

.conference-carousel-track {
    display: flex;
    height: 100%;
    transition: transform 0.5s var(--transition);
}

.conference-carousel-slide {
    min-width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Images optimisées pour fullscreen */
.conference-carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* Overlay pour améliorer la lisibilité */
.conference-carousel-slide::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.1);
    z-index: 1;
}

/* Boutons navigation carrousel */
.conference-carousel-prev,
.conference-carousel-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    background: rgba(0, 0, 0, 0.5);
    border: none;
    color: var(--color-white);
    font-size: 1.5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
}

.conference-carousel-prev:hover,
.conference-carousel-next:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: translateY(-50%) scale(1.1);
}

.conference-carousel-prev {
    left: var(--spacing-lg);
}

.conference-carousel-next {
    right: var(--spacing-lg);
}

/* Indicateurs carrousel */
.conference-carousel-indicators {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-xs);
    z-index: 20;
    background: rgba(0, 0, 0, 0.3);
    padding: 10px 15px;
    border-radius: 30px;
}

.conference-indicator {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid var(--color-white);
    background: transparent;
    cursor: pointer;
    transition: all var(--transition);
    padding: 0;
}

.conference-indicator.active {
    background: var(--color-white);
    transform: scale(1.3);
}

.conference-indicator:hover {
    background: rgba(255, 255, 255, 0.5);
    transform: scale(1.2);
}

/* Section contenu */
.conference-content-section {
    padding: var(--spacing-xl) 0;
    background: var(--color-white);
    animation: fadeInUp 0.8s cubic-bezier(0.23, 1, 0.32, 1) 0.3s both;
}

.conference-content-section .container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Titre principal */
.conference-main-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    line-height: 1.3;
    position: relative;
    padding-bottom: var(--spacing-md);
}

.conference-main-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 3px;
    background: var(--color-text);
    border-radius: 2px;
}

/* Article conférence */
.conference-article {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--color-text);
}

.conference-article p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

.conference-article p:first-child {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.6;
}

/* Bouton retour */
.conference-back-link {
    text-align: center;
    padding-top: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.9rem 2rem;
    background: var(--color-primary);
    color: var(--color-white);
    text-decoration: none;
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: all var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-back:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-back i {
    font-size: 0.9rem;
    transition: transform var(--transition);
}

.btn-back:hover i {
    transform: translateX(-3px);
}

/* Animation d'apparition du texte */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 1200px) {
    .conference-carousel-prev,
    .conference-carousel-next {
        width: 55px;
        height: 55px;
        font-size: 1.3rem;
    }
    
    .conference-carousel-prev {
        left: var(--spacing-md);
    }
    
    .conference-carousel-next {
        right: var(--spacing-md);
    }
    
    .conference-main-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    :root {
        --navbar-height: 70px; /* Ajustez selon votre navbar mobile */
    }
    
    .conference-carousel-section {
        height: calc(70vh - var(--navbar-height));
    }
    
    .conference-carousel-prev,
    .conference-carousel-next {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
    
    .conference-carousel-prev {
        left: var(--spacing-sm);
    }
    
    .conference-carousel-next {
        right: var(--spacing-sm);
    }
    
    .conference-carousel-indicators {
        bottom: var(--spacing-md);
        padding: 8px 12px;
    }
    
    .conference-indicator {
        width: 12px;
        height: 12px;
    }
    
    .conference-main-title {
        font-size: 1.7rem;
        margin-bottom: var(--spacing-md);
    }
    
    .conference-article {
        font-size: 1rem;
        line-height: 1.6;
    }
    
    .conference-content-section .container {
        padding: 0 var(--spacing-sm);
    }
}

@media (max-width: 576px) {
    :root {
        --navbar-height: 60px; /* Hauteur réduite pour mobile */
    }
    
    .conference-carousel-section {
        height: calc(60vh - var(--navbar-height));
    }
    
    .conference-carousel-prev,
    .conference-carousel-next {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .conference-carousel-prev {
        left: 15px;
    }
    
    .conference-carousel-next {
        right: 15px;
    }
    
    .conference-carousel-indicators {
        bottom: 20px;
        padding: 6px 10px;
    }
    
    .conference-indicator {
        width: 10px;
        height: 10px;
    }
    
    .conference-main-title {
        font-size: 1.5rem;
        padding-bottom: var(--spacing-sm);
    }
    
    .conference-article {
        font-size: 0.95rem;
    }
    
    .conference-article p {
        text-align: left;
    }
}

/* Pour l'orientation paysage sur mobile */
@media (max-height: 600px) and (orientation: landscape) {
    .conference-carousel-section {
        height: calc(100vh - var(--navbar-height));
    }
    
    .conference-carousel-indicators {
        bottom: 15px;
    }
}

/* Pour les très grands écrans */
@media (min-width: 1600px) {
    .conference-carousel-prev,
    .conference-carousel-next {
        width: 70px;
        height: 70px;
        font-size: 1.8rem;
    }
    
    .conference-main-title {
        font-size: 2.5rem;
    }
    
    .conference-article {
        font-size: 1.2rem;
        line-height: 1.8;
    }
    
    .conference-content-section .container {
        max-width: 1200px;
    }
}

/* Styles pour les images manquantes */
.conference-carousel-slide img[src*="undefined"],
.conference-carousel-slide img:not([src]) {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    position: relative;
}

.conference-carousel-slide img[src*="undefined"]::before,
.conference-carousel-slide img:not([src])::before {
    content: 'Conférence EHTP 2025';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-white);
    font-size: 2rem;
    font-weight: 600;
    text-align: center;
    padding: var(--spacing-md);
    z-index: 2;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}