body {
    font-family: Georgia, "Times New Roman", serif;
    margin: 0;
    padding: 0;
    background: #ffffff;
    color: #222;
    line-height: 1.7;
}

header {
    max-width: 900px;
    margin: 60px auto 30px auto;
    padding: 0 20px;
}

.header-flex {
    display: flex;
    align-items: center;
    gap: 40px;
}

.profile-img {
    width: 180px;
    height: 220px;
    object-fit: cover;
    border-radius: 6px;
}

h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
}

.tagline {
    font-size: 1rem;
    color: #555;
}

nav {
    border-top: 1px solid #ddd;
    border-bottom: 1px solid #ddd;
    padding: 12px 0;
    text-align: center;
    font-size: 0.95rem;
}

nav a {
    margin: 0 15px;
    text-decoration: none;
    color: #333;
}

nav a.active {
    font-weight: bold;
    border-bottom: 2px solid #333;
    padding-bottom: 4px;
}

nav a:hover {
    text-decoration: underline;
}

main {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

h2 {
    margin-top: 40px;
    font-size: 1.4rem;
}

ul {
    padding-left: 20px;
}

.publication {
    margin-bottom: 20px;
}

footer {
    max-width: 900px;
    margin: 60px auto 30px auto;
    padding: 0 20px;
    font-size: 0.9rem;
    color: #777;
    border-top: 1px solid #ddd;
    padding-top: 20px;
}