/* Alap */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Montserrat', sans-serif;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Nav-bar beállítások */
        nav {
            background-color: #fff;
            padding: 20px 0;
            position: sticky; 
            top: 0; 
            z-index: 100;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }

        nav .container {
            display: flex;
            justify-content: space-between; 
            align-items: center;
            width: 100%; 
        }

        .logo a{
            text-decoration: none;
            color: inherit;
            font-weight: 600;
        }

        .logo {
            font-weight: 800;
            font-size: 24px;
            color: #0B2B40;
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .logo img {
            height: 40px; 
        }

        .menu a {
            text-decoration: none;
            color: #333;
            margin-left: 20px;
            font-weight: 600;
            font-size: 14px;
            transition: color 0.3s;
        }

        .menu a:hover {
            color: #17a2b8;
        }
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            background-color: #fff;
            position: sticky;
             z-index: 100;
             box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        

        /* Hero section beállítások */
        .hero {
            background: linear-gradient(135deg, #071a2b 0%, #0d5c6e 100%);
            color: white;
            text-align: center;
            padding: 100px 20px 70px 20px; 
        }
        .hero h1 {
            font-size: 48px;
            margin-bottom: 15px;
            letter-spacing: 2px;
        }
        .hero p {
            font-size: 16px;
            ;
            margin-bottom: 40px;
            font-weight: 400;
            opacity: 0.9;
        }
        .btn {
            text-decoration: none;
            padding: 12px 25px;
            border-radius: 25px;
            font-weight: 600;
            font-size: 14px;
            margin: 10 10px;
            display: inline-block;
            transition: transform 0.2s;
        }
        .btn:hover {
            transform: scale(1.05);
        }
        .btn-primary {
            background-color: #0d5c6e;
            color: white;
        }
        .btn-secondary {
            background-color: #0d5c6e;
            color: white;
        }
        .pillars {
            display: flex;
            justify-content: space-between;
            gap: 30px;
            margin-top: -80px; 
            position: relative;
            z-index: 10;
        }
        .card {
            background: white;
            padding: 40px 30px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            text-align: center;
            flex: 1;
        }
        .card i {
            font-size: 40px;
            color: #17a2b8;
            margin-bottom: 20px;
        }
        .card h3 {
            font-size: 18px;
            margin-bottom: 15px;
            color: #0B2B40;
        }
        .card p {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }

        /* News section */
        .news-section {
            padding: 80px 0;
            text-align: center;
        }
        .news-section h2 {
            font-size: 24px;
            color: #0B2B40;
            margin-bottom: 40px;
        }
        
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .news-item {
            display: flex;
            background: white;
            border-radius: 8px;
            overflow: hidden;
            text-decoration: none;
            color: inherit;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s ease;
        }

        .news-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            
        }

        /* A bal oldali dátum blokk */
        .news-date {
            background-color: #071a2b; 
            color: white;
            padding: 20px 15px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-width: 80px;
        }

        .news-date .month {
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            color: #17a2b8;
        }

        .news-date .day {
            font-size: 24px;
            font-weight: 800;
        }

        .news-content {
            padding: 25px;
            display: flex;
            flex-direction: column;
        }

        .news-category {
            font-size: 11px;
            font-weight: 800;
            color: #999;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }

        .news-content h4 {
            font-size: 18px;
            color: #0B2B40;
            margin-bottom: 10px;
            line-height: 1.3;
        }

        .news-content p {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
            margin-bottom: 20px;
            flex-grow: 1; 
        }
        .read-more {
            font-size: 13px;
            font-weight: 600;
            color: #17a2b8;
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .news-item:hover .read-more i {
            transform: translateX(5px); 
            transition: transform 0.3s ease;
        }
        .news-item .img-placeholder {
            width: 80px;
            height: 80px;
            background-color: #0d5c6e;
            border-radius: 6px;
        }
        .news-item h4 {
            font-size: 14px;
            color: #333;
        }
        /* LÁBLÉC */
        .site-footer {
            background-color: #094350; 
            color: #e0e0e0;
            padding: 30px 0 0 0;
            margin-top: 30px;
        }

        .footer-content {
            display: flex;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap; 
            padding-bottom: 40px;
        }

        .footer-column {
            flex: 1;
            min-width: 250px; 
        }

        .footer-column h4 {
            color: #e0e0e0;
            font-size: 18px;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-column h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 3px;
            background-color: #17a2b8; 
        }
        .footer-column p {
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 10px;
        }

        .footer-column ul {
            list-style: none; 
        }

        .footer-column ul li {
            margin-bottom: 10px;
        }

        .footer-column a {
            color: #e0e0e0;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .footer-column a:hover {
            color: #17a2b8; 
        }

        .footer-logos {
            margin-top: 20px;
            font-size: 24px;
            color: #e0e0e0;
            opacity: 0.6;
        }

        .social-links {
            margin-top: 15px;
            display: flex;
            gap: 15px;
        }

        .social-links a {
            font-size: 20px;
            color: #e0e0e0;
            opacity: 0.8;
        }

        .social-links a:hover {
            opacity: 1;
            color: #17a2b8;
        }

        /* rights */
        .footer-bottom {
            background-color: #062b33;
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            margin: 0;
            opacity: 0.7;
        }
    /* ALOLDALAK */

        .page-header {
            background: linear-gradient(135deg, #071a2b 0%, #0d5c6e 100%);
            color: white;
            text-align: center;
            padding: 60px 20px;
        }

        .page-header h1 {
            font-size: 36px;
            margin-bottom: 10px;
            letter-spacing: 1px;
        }

        .page-header p {
            font-size: 16px;
            opacity: 0.9;
            margin-top: 10px;
            margin-bottom: 10px;
            
        }

        /* TEAM OLDAL */

        .team-section {
            padding: 40px 0;
        }

        .team-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        @media (max-width: 900px) {
            .team-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 500px) {
            .team-grid {
                grid-template-columns: 1fr;
            }
        }

        .team-card {
            background: white;
            border-radius: 12px;
            padding: 40px 30px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s ease;
        }

        .team-card:hover {
            transform: translateY(-5px); 
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }

        .team-img-placeholder {
            width: 120px;
            height: 120px;
            border-radius: 50%; 
            background-color: #0d5c6e;
            margin: 0 auto 20px auto;
        }

        .team-img-container {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background-color: #0d5c6e; 
            margin: 0 auto 20px auto;
            overflow: hidden; 
            display: flex; 
            justify-content: center;
            align-items: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05); 
        }

        .team-img {
            width: 100%; 
            height: 100%;
            object-fit: cover; 
            display: block;
        }

        .team-card h3 {
            color: #0B2B40;
            font-size: 20px;
            margin-bottom: 5px;
        }

        .team-card .role {
            color: #17a2b8;
            font-weight: 600;
            font-size: 14px;
            margin-bottom: 15px;
        }

        .team-card p {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .team-social a {
            color: #0B2B40;
            font-size: 18px;
            margin: 0 10px;
            transition: color 0.3s;
        }

        .team-social a:hover {
            color: #17a2b8;
        }
        /* PUBLIKÁCIÓK OLDAL */

        .publications-section {
            padding: 60px 0;
            max-width: 900px; 
            margin: 0 auto;
        }

        .pub-year-header {
            font-size: 28px;
            color: #0B2B40;
            margin: 50px 0 20px 0;
            padding-bottom: 10px;
            border-bottom: 3px solid #17a2b8;
        }

        .pub-card {
            background-color: #fff;
            padding: 25px 30px;
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            margin-bottom: 25px;
            border-left: 5px solid #17a2b8; 
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

        .pub-card:hover {
            transform: translateX(5px); 
            box-shadow: 0 6px 15px rgba(0,0,0,0.1);
        }

        .pub-title {
            font-size: 18px;
            color: #0B2B40;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .pub-authors {
            font-size: 15px;
            color: #444;
            margin-bottom: 5px;
        }

        .pub-journal {
            font-size: 14px;
            color: #666;
            margin-bottom: 15px;
        }

        .pub-links {
            display: flex;
            gap: 10px;
            flex-wrap: wrap; 
        }

        .pub-badge {
            padding: 5px 12px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 4px;
            text-decoration: none;
            color: white;
            transition: opacity 0.3s;
        }

        .pub-badge:hover {
            opacity: 0.8;
        }

        .pub-badge.ads {
         background-color: #2a5aa8;
        }
        .pub-badge.arxiv {
            background-color: #b31b1b; 
        }

        .pub-badge.doi {
            background-color: #0B2B40; 
        }

        .pub-badge.pdf {
            background-color: #17a2b8;
        }
        /* ABOUT */

        .about-section {
            padding: 60px 0;
        }

        .about-content {
            max-width: 800px; 
            margin: 0 auto;   
            background: #fff;
            padding: 40px 50px;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.03);
            text-align: left;
        }

        .about-content h2 {
            color: #0B2B40;
            font-size: 26px;
            margin-top: 40px;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #e0e0e0;
        }

        .about-content h2:first-of-type {
            margin-top: 0; 
        }

        .about-content p {
            font-size: 16px;
            line-height: 1.8; 
            color: #444;
            margin-bottom: 20px;
        }

        
        .about-list {
            list-style: none;
            margin-bottom: 30px;
        }

        .about-list li {
            font-size: 16px;
            line-height: 1.6;
            color: #444;
            margin-bottom: 15px;
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }

        .about-list li i {
            margin-top: 4px; 
        }

       
        .tech-box {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            background-color: #f0f7f9; 
            padding: 25px;
            border-radius: 8px;
            border-left: 4px solid #17a2b8;
            margin: 30px 0;
        }

        .tech-icon {
            font-size: 40px;
            color: #0B2B40;
        }

        .tech-box h4 {
            color: #0B2B40;
            font-size: 18px;
            margin-bottom: 10px;
        }

        .tech-box p {
            margin-bottom: 0; 
            font-size: 15px;
        }


    /* MOBIL NÉZET */
    @media (max-width: 768px) {
        nav .container {
            flex-direction: column; 
            gap: 15px; 
        }
        
        .menu {
            display: flex;
            flex-wrap: wrap; 
            justify-content: center; 
            gap: 15px; 
        }

        .menu a {
            margin-left: 0; 
        }
    }