body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}
header {
    background: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}
header h1 {
    margin: 0;
}
nav {
    background: #444;
    padding: 0.5rem 0;
}
nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
}
nav ul li {
    margin: 0 1rem;
}
nav ul li a {
    color: #fff;
    text-decoration: none;
}
.container {
    padding: 2rem;
}
.section {
    margin-bottom: 2rem;
}
.section h2 {
    border-bottom: 2px solid #444;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}
footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
}
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: #444;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
}
.btn:hover {
    background: #555;
}

#about img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
}