body {
    font-family: 'Helvetica', 'Arial', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333;
    background-color: #f4f4f4;
}

.container {
    width: 80%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 15px;
}

header {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
}

nav {
    background-color: #34495e;
    color: white;
    padding: 1rem 0;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #3498db;
}

.section {
    padding: 3rem 0;
}

.section h2 {
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

#skills ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    list-style: none;
    padding: 0;
}

#skills ul li {
    background-color: #3498db;
    color: white;
    margin: 10px;
    padding: 10px 20px;
    border-radius: 5px;
}

.project {
    background-color: white;
    border: 1px solid #ddd;
    margin-bottom: 20px;
    padding: 20px;
    border-radius: 5px;
}

footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 1rem 0;
}

@media screen and (max-width: 768px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }

    nav ul li {
        margin: 10px 0;
    }
}