/* Variables de couleurs et thème */
:root {
    --primary-blue: #0077B6;
    --secondary-blue: #00A8E8;
    --light-blue: #90E0EF;
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --medium-gray: #E9ECEF;
    --dark-gray: #343A40;
    --text-color: #333333;
    --shadow: rgba(0, 0, 0, 0.08);
    --shadow-hover: rgba(0, 119, 182, 0.15);
    --transition: all 0.3s ease;
    --border-radius: 12px;
}

/* Reset et styles de base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Open Sans', sans-serif;
    color: var(--text-color);
    line-height: 1.5;
    background-color: var(--light-gray);
    font-size: 14px;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    color: var(--primary-blue);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p, li, .card-text {
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Arrière-plan flouté */
.blur-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: blur(8px);
    opacity: 0.4;
    z-index: -2;
    transform: scale(1.1);
}

/* Header amélioré */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 119, 182, 0.1);
    box-shadow: 0 2px 15px var(--shadow);
}

.navbar {
    padding: 0.5rem 0;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-unikin {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.logo-ere {
    height: 45px;
    width: auto;
    object-fit: contain;
}

/* Navigation améliorée */
.navbar-nav .nav-link {
    color: var(--dark-gray) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    margin: 0 2px;
    border-radius: 8px;
    transition: var(--transition);
    font-size: 0.875rem;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-hover);
}

.navbar-nav .nav-link i {
    font-size: 0.9rem;
}

/* Contenu principal */
.tab-content {
    position: relative;
    min-height: calc(100vh - 140px);
}

.content-overlay {
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.92);
    border-radius: var(--border-radius);
    margin-top: 15px;
    margin-bottom: 15px;
    padding: 1.5rem !important;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 119, 182, 0.1);
}

/* Carousel amélioré */
.carousel {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.carousel-img {
    height: 350px;
    object-fit: cover;
}

.carousel-caption {
    background: rgba(0, 119, 182, 0.85);
    padding: 15px;
    border-radius: 8px;
    bottom: 20px !important;
    left: 5% !important;
    right: 5% !important;
    backdrop-filter: blur(5px);
}

.carousel-caption h3 {
    color: var(--white);
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.carousel-caption p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
}

/* Cartes améliorées */
.card {
    border: none;
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    margin-bottom: 15px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px var(--shadow-hover) !important;
}

/* Carte du directeur */
.director-card {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    height: 100%;
}

.director-img-container {
    width: 140px;
    height: 140px;
    margin: 0 auto;
    border: 4px solid rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.director-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.director-img:hover {
    transform: scale(1.05);
}

/* Icônes pour les cartes */
.strength-icon, .objective-icon, .risk-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--light-blue), var(--secondary-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 10px;
    font-size: 1.25rem;
    color: var(--white);
    box-shadow: 0 4px 10px rgba(0, 119, 182, 0.2);
    transition: var(--transition);
}

.card:hover .strength-icon,
.card:hover .objective-icon,
.card:hover .risk-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 6px 15px rgba(0, 119, 182, 0.3);
}

/* Cartes du corps professoral */
.professor-card {
    text-align: center;
    padding: 15px;
}

.professor-img-container {
    width: 110px;
    height: 110px;
    margin: 0 auto 15px;
    border: 3px solid var(--primary-blue);
    border-radius: 50%;
    overflow: hidden;
    padding: 3px;
    background: var(--white);
    box-shadow: 0 4px 15px rgba(0, 119, 182, 0.2);
    transition: var(--transition);
}

.professor-card:hover .professor-img-container {
    transform: scale(1.05);
    border-color: var(--secondary-blue);
    box-shadow: 0 6px 20px rgba(0, 119, 182, 0.3);
}

.professor-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.professor-card .flag-icon {
    font-size: 1.5rem;
    margin-top: 8px;
}

/* Section programme */
.specialization-card, .phd-topic, .institution-card {
    background: rgba(144, 224, 239, 0.1);
    border: 1px solid rgba(0, 119, 182, 0.1) !important;
    transition: var(--transition);
}

.specialization-card:hover, .phd-topic:hover, .institution-card:hover {
    border-color: var(--primary-blue) !important;
    background: rgba(144, 224, 239, 0.2);
    transform: translateY(-3px);
}

/* Footer amélioré */
.footer {
    background: var(--white);
    border-top: 3px solid var(--primary-blue);
    margin-top: 20px;
}

.partners-section {
    padding: 20px 0;
    border-bottom: 1px solid var(--medium-gray);
}

.partner-logo-container {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    background: var(--white);
    border-radius: 8px;
    border: 1px solid var(--medium-gray);
    transition: var(--transition);
}

.partner-logo-container:hover {
    transform: translateY(-3px);
    border-color: var(--primary-blue);
    box-shadow: 0 4px 12px var(--shadow);
}

.partner-logo {
    max-width: 100%;
    max-height: 44px;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.8;
    transition: var(--transition);
}

.partner-logo-container:hover .partner-logo {
    filter: grayscale(0%);
    opacity: 1;
}

.contact-section {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    padding: 20px 0;
    color: var(--white);
}

.contact-section a {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.contact-section a:hover {
    color: var(--light-blue);
    text-decoration: underline;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tab-pane.active {
    animation: fadeIn 0.4s ease-out;
}

/* Effets de focus */
:focus {
    outline: 2px solid var(--secondary-blue);
    outline-offset: 2px;
}

/* Scrollbar personnalisée */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(transparent, var(--primary-blue), transparent);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(transparent, var(--secondary-blue), transparent);
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        font-size: 13px;
    }
    
    .logo-unikin {
        height: 35px;
    }
    
    .logo-ere {
        height: 40px;
    }
    
    .carousel-img {
        height: 250px;
    }
    
    .carousel-caption {
        bottom: 10px !important;
        padding: 10px;
    }
    
    .carousel-caption h3 {
        font-size: 0.9rem;
    }
    
    .carousel-caption p {
        font-size: 0.8rem;
    }
    
    .director-img-container {
        width: 120px;
        height: 120px;
    }
    
    .professor-img-container {
        width: 90px;
        height: 90px;
    }
    
    .content-overlay {
        margin: 10px;
        padding: 1rem !important;
    }
    
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.3rem; }
    h3 { font-size: 1.1rem; }
    h4 { font-size: 1rem; }
}

@media (max-width: 576px) {
    .navbar-brand-text {
        display: none;
    }
    
    .card-body {
        padding: 15px !important;
    }
    
    .strength-icon, .objective-icon, .risk-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .partner-logo-container {
        height: 50px;
    }
    
    .partner-logo {
        max-height: 36px;
    }
}

/* Amélioration des boutons */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    border: none;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.875rem;
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(0, 119, 182, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--secondary-blue), var(--light-blue));
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 119, 182, 0.3);
}

/* Effets de bordure subtils */
.card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue), var(--light-blue));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover::after {
    opacity: 1;
}

/* Optimisation pour les mobiles */
@media (hover: none) {
    .card:hover {
        transform: none;
    }
    
    .navbar-nav .nav-link:hover {
        transform: none;
    }
}
/* Style pour l'image des actualités (Option 1) */
.news-img {
    height: 180px;
    object-fit: cover;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
    transition: var(--transition);
}

.news-card:hover .news-img {
    transform: scale(1.05);
}

/* Style pour l'image latérale (Option 2) */
.news-img-side {
    object-fit: cover;
    border-top-left-radius: var(--border-radius);
    border-bottom-left-radius: var(--border-radius);
}

/* Style pour l'image en arrière-plan (Option 3) */
.news-bg-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    border-radius: var(--border-radius);
    opacity: 0.3;
    z-index: 0;
}

.news-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 119, 182, 0.8), rgba(0, 168, 232, 0.6));
    border-radius: var(--border-radius);
    z-index: 0;
}

/* Style pour l'icône de catégorie (Option 5) */
.news-category-icon {
    position: absolute;
    top: 10px;
    left: 10px;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 1.2rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    z-index: 2;
}

/* Style pour le badge (Option 4) */
.news-card .badge {
    font-size: 0.7rem;
    padding: 4px 8px;
    font-weight: 500;
    z-index: 2;
}

/* Ajustement pour la hauteur égale des cartes */
.news-card {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.news-card .card-body {
    flex: 1;
}

/* Hover effect sur toute la carte */
.news-card {
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px var(--shadow-hover) !important;
}
/* Style pour l'image des projets de recherche */
.research-img {
    height: 200px;
    object-fit: cover;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
    transition: transform 0.3s ease;
}

.research-card:hover .research-img {
    transform: scale(1.05);
}

/* Pour l'Option 2 - Overlay */
.research-img-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: white;
}

/* Pour l'Option 3 - Catégorie */
.research-category {
    width: 36px;
    height: 36px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Pour l'Option 4 - Image latérale */
.research-img-side {
    border-top-left-radius: var(--border-radius);
    border-bottom-left-radius: var(--border-radius);
}

/* Pour l'Option 5 - Header avec icône */
.research-header {
    height: 180px;
    overflow: hidden;
    position: relative;
}

.research-header-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.research-header-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 119, 182, 0.7), rgba(0, 168, 232, 0.5));
}

.research-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Ajustement pour les badges */
.research-card .badge {
    font-size: 0.7rem;
    padding: 4px 8px;
    font-weight: 500;
    z-index: 2;
}

/* Pour les cartes de recherche */
.research-card {
    transition: var(--transition);
    overflow: hidden;
}

.research-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px var(--shadow-hover) !important;
}

.research-meta {
    margin-top: auto;
    padding-top: 10px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}
/* Styles pour les badges de statut */
.research-card .badge {
    font-size: 0.65rem;
    padding: 3px 8px;
    font-weight: 500;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Badge "Nouveau" */
.badge.bg-success {
    background: linear-gradient(135deg, #28a745, #20c997) !important;
}

/* Badge "En cours" */
.badge.bg-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue)) !important;
}

/* Badge "Fini" */
.badge.bg-secondary {
    background: linear-gradient(135deg, #6c757d, #868e96) !important;
}

/* Badge "Expérimentation" */
.badge.bg-warning {
    background: linear-gradient(135deg, #ffc107, #fd7e14) !important;
}

/* Badge "Collaboration" */
.badge.bg-info {
    background: linear-gradient(135deg, #17a2b8, #0dcaf0) !important;
}

/* Badge "Financement" personnalisé */
.bg-purple {
    background: linear-gradient(135deg, #6f42c1, #8e44ad) !important;
}

/* Badges thématiques */
.bg-water {
    background: linear-gradient(135deg, #0077B6, #00A8E8) !important;
    color: white;
}

.bg-model {
    background: linear-gradient(135deg, #6610f2, #9d4edd) !important;
    color: white;
}

.bg-climate {
    background: linear-gradient(135deg, #20c997, #12b886) !important;
    color: white;
}

.bg-tech {
    background: linear-gradient(135deg, #fd7e14, #f76707) !important;
    color: white;
}

.bg-data {
    background: linear-gradient(135deg, #6f42c1, #5e35b1) !important;
    color: white;
}

.bg-sustain {
    background: linear-gradient(135deg, #198754, #2e8b57) !important;
    color: white;
}

.bg-rural {
    background: linear-gradient(135deg, #795548, #8d6e63) !important;
    color: white;
}

.bg-urban {
    background: linear-gradient(135deg, #343a40, #495057) !important;
    color: white;
}

/* Icône de catégorie améliorée */
.research-category {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: 0 4px 12px rgba(0, 119, 182, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.8);
    z-index: 2;
}

/* Effet hover sur l'icône */
.research-card:hover .research-category {
    transform: scale(1.1);
    transition: transform 0.3s ease;
}

/* Pour les badges en bas de carte */
.d-flex.flex-wrap.gap-1 {
    margin-bottom: 8px;
}

.d-flex.flex-wrap.gap-1 .badge {
    font-size: 0.6rem;
    padding: 2px 6px;
}

/* Badge de durée */
.badge.bg-light {
    font-size: 0.6rem;
    padding: 2px 6px;
    border: 1px solid #dee2e6;
}