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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

header {
    background: #333;
    color: #fff;
    padding: 20px 0;
    text-align: center;
}

nav ul {
    list-style: none;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav a {
    color: white;
    text-decoration: none;
}

section {
    padding: 20px;
    margin: 15px 0;
}

.project-card {
    background: #f4f4f4;
    padding: 15px;
    border: 1px solid #ccc;
    margin: 10px 0;
}

footer {
    text-align: center;
    padding: 10px 0;
    background: #333;
    color: white;
}

/* Responsive styles */
@media (max-width: 600px) {
    nav ul li {
        display: block;
        margin: 10px 0;
    }

    header, section {
        padding: 15px;
    }

    .project-card {
        margin: 15px 0;
    }
}