/* Responsive Design for various screen sizes */

/* Tablet and smaller desktops */
@media (max-width: 1024px) {
    .container {
        padding: 15px;
    }

    header h1 {
        font-size: 2em;
    }

    nav ul li {
        margin-left: 20px;
    }

    nav ul li a {
        font-size: 1em;
    }

    .hero h2 {
        font-size: 3em;
    }

    .hero p {
        font-size: 1.3em;
    }

    section h2 {
        font-size: 2.5em;
    }

    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }

    .feature-card {
        padding: 25px;
    }

    .feature-card h3 {
        font-size: 1.6em;
    }

    .feature-card p {
        font-size: 1em;
    }

    .cta-section h2 {
        font-size: 2.5em;
    }

    .cta-section p {
        font-size: 1.2em;
    }

    .conference-content h3 {
        font-size: 1.8em;
    }

    .conference-content p {
        font-size: 1em;
    }

    .info-block h3 {
        font-size: 2em;
    }

    .info-block p, .info-block ul li {
        font-size: 1em;
    }

    .contact-item h3 {
        font-size: 1.4em;
    }

    .contact-item p {
        font-size: 1em;
    }
}

/* Mobile devices (portrait and landscape) */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        text-align: center;
    }

    header h1 {
        margin-bottom: 10px;
    }

    nav ul {
        margin-top: 15px;
        flex-direction: column;
        align-items: center;
    }

    nav ul li {
        margin: 8px 0;
    }

    .hero {
        padding: 80px 15px;
        min-height: 50vh;
    }

    .hero h2 {
        font-size: 2.5em;
    }

    .hero p {
        font-size: 1.1em;
    }

    .btn {
        padding: 12px 25px;
        font-size: 1em;
    }

    section {
        padding: 50px 0;
    }

    section h2 {
        font-size: 2.2em;
        margin-bottom: 30px;
    }

    .features-grid, .contact-info {
        grid-template-columns: 1fr;
    }

    .feature-card {
        padding: 20px;
    }

    .cta-section {
        padding: 60px 15px;
    }

    .cta-section h2 {
        font-size: 2.2em;
    }

    .cta-section p {
        font-size: 1.1em;
    }

    footer {
        padding: 30px 0;
    }

    .footer-links ul {
        flex-direction: column;
    }

    .footer-links ul li {
        margin: 8px 0;
    }

    .form-section {
        margin: 20px auto;
        padding: 30px;
    }

    .conference-card img {
        height: 200px;
    }

    .conference-content h3 {
        font-size: 1.6em;
    }

    .info-block h3 {
        font-size: 1.8em;
    }
}

/* Smaller mobile devices */
@media (max-width: 480px) {
    header h1 {
        font-size: 1.8em;
    }

    .hero h2 {
        font-size: 2em;
    }

    .hero p {
        font-size: 1em;
    }

    section h2 {
        font-size: 1.8em;
    }

    .feature-card h3 {
        font-size: 1.4em;
    }

    .cta-section h2 {
        font-size: 1.8em;
    }

    .cta-section p {
        font-size: 1em;
    }

    .form-section {
        padding: 20px;
    }

    .conference-content h3 {
        font-size: 1.4em;
    }

    .conference-meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .conference-meta span {
        margin-bottom: 5px;
    }

    .info-block h3 {
        font-size: 1.6em;
    }

    .contact-item h3 {
        font-size: 1.2em;
    }
}