/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 768px) {
    /* Navigation */
    .nav-brand {
        font-size: 1.3rem;
    }
    
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 1rem 0;
    }

    /* Hero Section */
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-image {
        order: -1;
    }

    .profile-photo {
        width: 160px;
        height: 200px;
    }

    .hero-text h1 {
        font-size: 1.8rem;
    }

    /* General Sections */
    section {
        padding: 40px 0;
    }

    .section-title {
        font-size: 1.5rem;
    }

    /* Skills */
    .skills-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    /* Projects and Experience */
    .research-projects .project,
    .experience-item,
    .education-item {
        padding: 1.5rem;
    }

    /* Contact */
    .contact-simple .contact-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.3rem;
    }

    .contact-simple strong {
        min-width: auto;
        margin-right: 0;
    }
}

@media (max-width: 480px) {
    .nav-brand {
        font-size: 1.1rem;
    }
    
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-text h1 {
        font-size: 1.6rem;
    }

    .bio {
        font-size: 1rem;
    }

    .research-projects .project,
    .experience-item,
    .education-item {
        padding: 1.2rem;
        margin-bottom: 1.2rem;
    }

    .courses-grid {
        grid-template-columns: 1fr;
    }
}