/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(15, 23, 42, 0.98);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1rem;
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 0.5rem 0;
    }

    .menu-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero .subtitle {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .timeline {
        padding-left: 2rem;
    }

    .timeline::before {
        left: 5px;
    }

    .timeline-item::before {
        left: -28px;
    }

    .experience-header {
        flex-direction: column;
        align-items: start;
    }

    .experience-date {
        margin-top: 0.5rem;
    }

    .cta-buttons {
        justify-content: center;
    }

    .contact-info {
        flex-direction: column;
        align-items: center;
    }

    .skills-grid,
    .additional-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .education-card {
        padding: 2rem;
    }

    .education-card h3 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    section {
        padding: 3rem 0;
    }

    .container {
        padding: 0 1rem;
    }

    .hero h1 {
        font-size: 2rem;
        letter-spacing: -1px;
    }

    .hero .subtitle {
        font-size: 1.2rem;
    }

    .hero .description {
        font-size: 1rem;
    }

    .btn {
        padding: 0.7rem 1.8rem;
        font-size: 0.9rem;
    }

    .experience-card,
    .project-card {
        padding: 1.5rem;
    }
    
    .project-title {
        font-size: 1.3rem;
        flex-direction: column;
        align-items: start;
        gap: 0.5rem;
    }
    
    .tech-tags {
        justify-content: center;
    }

    .timeline {
        padding-left: 1.5rem;
    }
}