/* 
==============================================
RESPONSIVE STYLESHEET
Author: David Lupau
==============================================
*/

/* Large devices (laptops/desktops, up to 1200px) */
@media screen and (max-width: 1200px) {
    .container {
        max-width: 992px;
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .certificate-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Medium devices (tablets, up to 992px) */
@media screen and (max-width: 992px) {
    .container {
        max-width: 768px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .certificate-grid {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero h2 {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .project-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .project-icon {
        margin-bottom: var(--spacing-md);
    }
}

/* Small devices (mobile landscape, up to 768px) */
@media screen and (max-width: 768px) {
    .container {
        max-width: 576px;
    }
    
    header .container {
        flex-direction: column;
    }
    
    .logo {
        margin-bottom: var(--spacing-sm);
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav li {
        margin: var(--spacing-xs);
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        padding-left: 60px;
    }
    
    .timeline-item::before {
        left: 21px;
    }
    
    .education-item {
        flex-direction: column;
    }
    
    .education-icon {
        margin-bottom: var(--spacing-md);
    }
    
    .social-icons {
        gap: var(--spacing-md);
    }
}

/* Extra small devices (mobile portrait, up to 576px) */
@media screen and (max-width: 576px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .hero-content {
        padding: var(--spacing-lg) 0;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero h2 {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .section-subtitle {
        font-size: 0.9rem;
    }
    
    .timeline-content h3 {
        font-size: 1.1rem;
    }
    
    .timeline-content h4 {
        font-size: 0.9rem;
    }
    
    .about-item, 
    .timeline-content, 
    .education-item, 
    .certificate-item,
    .contact-content,
    .project-item {
        padding: var(--spacing-md);
    }
    
    .certificates-tabs {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-xs);
    }
    
    .tab-btn {
        width: 100%;
        text-align: center;
    }
}