body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.header, .footer {
    text-align: center;
}

@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }

    .header, .footer {
        font-size: 14px;
    }
    
    .intro-text h1 {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1.2rem;
    }
    
    .main-nav ul {
        flex-direction: column;
    }
    
    .main-nav a {
        padding: 15px 20px;
        justify-content: center;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-info {
        flex-direction: column;
        align-items: center;
    }
    
    .hero {
        padding: 60px 20px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .header, .footer {
        font-size: 12px;
    }

    .project-card {
        flex-direction: column;
        margin-bottom: 20px;
    }
    
    .profile-photo {
        width: 150px;
        height: 150px;
    }
    
    .logo {
        width: 50px;
        height: 50px;
        right: calc(50% - 95px);
    }
    
    .intro-text h1 {
        font-size: 2rem;
    }
    
    .btn {
        padding: 12px 25px;
        font-size: 0.9rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}