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

/* Tablets and smaller screens */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .hero {
        padding: 4rem 1rem 3rem;
        min-height: 70vh;
    }

    .hero-title {
        font-size: 2rem;
    }

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

    .hero-content {
        max-width: 100%;
    }

    section {
        padding: 3rem 1rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-image img {
        max-width: 250px;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .certificates-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .video-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
        gap: 0.75rem;
    }

    .btn {
        width: 100%;
        text-align: center;
        padding: 0.75rem 1.5rem;
        font-size: 0.875rem;
    }

    .timeline-content {
        padding: 1rem;
    }

    .certificate-card {
        padding: 1rem;
    }

    .certificate-icon {
        font-size: 2rem;
        margin-bottom: 0.5rem;
    }

    .project-card {
        margin-bottom: 0;
        padding: 1rem;
    }

    .project-icon {
        font-size: 2rem;
        margin-bottom: 0.5rem;
    }

    .project-card h3 {
        font-size: 1.1rem;
    }
}

/* Mobile phones */
@media (max-width: 480px) {
    .nav-container {
        padding: 1rem;
    }

    .hero {
        padding: 3rem 1rem 2rem;
        min-height: 60vh;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 0.875rem;
    }

    section {
        padding: 2.5rem 1rem;
    }

    .about-image img {
        max-width: 200px;
    }

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

    .timeline {
        padding-left: 1.5rem;
    }

    .timeline-dot {
        left: -2rem;
    }

    .projects-grid {
        gap: 0.75rem;
    }

    .project-card {
        padding: 0.75rem;
    }

    .project-icon {
        font-size: 1.5rem;
    }

    .project-card h3 {
        font-size: 0.875rem;
    }

    .certificates-grid {
        gap: 0.75rem;
    }

    .certificate-card {
        padding: 0.75rem;
    }

    .video-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .certificate-icon {
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
    }

    .certificate-card h3 {
        font-size: 0.875rem;
        margin-bottom: 0.25rem;
    }

    .certificate-issuer {
        font-size: 0.75rem;
        margin-bottom: 0.25rem;
    }

    .certificate-date {
        font-size: 0.75rem;
        margin-bottom: 0.5rem;
    }

    .btn-secondary {
        padding: 0.5rem 1rem;
        font-size: 0.75rem;
    }

    .skill-tag {
        font-size: 0.75rem;
        padding: 0.35rem 0.75rem;
    }
}