:root {
    --primary-color: #0078ff;
    --secondary-color: #0d0b2d;
    --accent-color: #f8f9fa;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--accent-color);
}

.hero-section {
    background: linear-gradient(rgba(0, 120, 255, 0.8), rgba(0, 120, 255, 0.8)), url('../images/pattern_ai.jpg');
    background-size: cover;
    background-position: center;
    height: 60vh;
    display: flex;
    align-items: center;
    color: white;
}

.publication-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin: 2rem 0;
    padding: 2rem;
    transition: transform 0.3s;
}

.publication-card:hover {
    transform: translateY(-5px);
}

.publication-img {
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    max-height: 800px;
    object-fit: cover;
    width: 100%;
}

.publication-content {
    padding: 2rem;
}

.highlight-number {
    color: var(--primary-color);
    font-size: 2.5rem;
    font-weight: 700;
}

.section-title {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
}

.navbar {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.value-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.social-icon {
    transition: all 0.3s;
    color: var(--secondary-color);
    font-size: 2.5rem;
}

.social-icon:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

/* footer  */

.footer {
    background-color: white;
    color: #0d0b2d;
    padding: 20px 0;
}

.footer .footer-logo img {
    max-width: 150px;
}

.footer .footer-bottom {
    border-top: 1px solid #ddd;
    padding-top: 10px;
    margin-top: 10px;
}

.footer .social-icons a {
    color: #0d0b2d;
    margin: 0 10px;
    font-size: 1.5rem;
}

/* navbar  */

@media (max-width: 768px) {
    .navbar-brand img {
        height: 70px !important;
    }
}

@media (max-width: 576px) {
    .navbar-nav {
        text-align: center;
    }
    .nav-item {
        padding: 10px 0;
        border-bottom: 1px solid #f0f0f0;
    }
}