/* — Reset — */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

/* — Base — */
body {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    background: #eaecee;
    color: #2c2c2c;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    -webkit-font-smoothing: antialiased;
}

/* — Page container — */
.page {
    width: 100%;
    max-width: 780px;
    min-height: 100vh;
    background: #eff1f3;
    box-shadow: 0 0 40px rgba(0,0,0,0.08);
    padding: 24px 48px 60px;
}

/* — Navigation — */
nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-bottom: 0;
    padding: 8px 0;
}

nav hr {
    flex: 1;
    border: none;
    border-top: 1px solid #c8c8c8;
}

nav a {
    font-size: 17px;
    color: #2c2c2c;
    text-decoration: none;
    padding: 6px 16px;
    transition: color 0.2s;
    white-space: nowrap;
}

nav a:hover { color: #666; }
nav a.active { font-weight: 600; }

/* — Main / Home — */
main {
    text-align: center;
    padding-top: 40px;
}

.portrait {
    width: 450px;
    max-width: 100%;
    height: auto;
    border-radius: 0;
    object-fit: contain;
    margin-bottom: 36px;
    box-shadow: 0 2px 16px rgba(0,0,0,0.1);
    image-rendering: -webkit-optimize-contrast;
}

.bio {
    max-width: 520px;
    margin: 0 auto 16px;
    font-size: 18px;
    line-height: 1.65;
}

.contact {
    margin-top: 28px;
    font-size: 15px;
    color: #666;
    letter-spacing: 0.3px;
}

.social-links {
    margin-top: 14px;
    font-size: 15px;
}

.social-links a {
    color: #555;
    text-decoration: none;
    margin: 0 10px;
    transition: color 0.2s;
}

.social-links a:hover { color: #222; }

/* — Content pages — */
.content {
    padding-top: 40px;
}

.content h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 32px;
}

.content h2 {
    font-size: 20px;
    font-weight: 600;
    margin-top: 36px;
    margin-bottom: 16px;
    color: #333;
}

.content ul {
    list-style: none;
    padding: 0;
}

.content li {
    margin-bottom: 18px;
    font-size: 16px;
    line-height: 1.55;
}

.pub-title {
    font-weight: 600;
}

.pub-coauthors {
    color: #666;
    font-size: 15px;
}

.pub-venue {
    font-style: italic;
    color: #555;
    font-size: 15px;
}

.pub-link {
    color: #444;
    text-decoration: none;
    border-bottom: 1px solid #ccc;
    transition: color 0.2s, border-color 0.2s;
}

.pub-link:hover {
    color: #111;
    border-color: #888;
}

.course-link {
    color: #444;
    text-decoration: none;
    border-bottom: 1px solid #ccc;
    font-size: 14px;
    transition: color 0.2s, border-color 0.2s;
}

.course-link:hover {
    color: #111;
    border-color: #888;
}

/* — Responsive — */
@media (max-width: 600px) {
    .page { padding: 16px 20px 40px; }
    nav a { font-size: 14px; padding: 6px 8px; }
    .portrait { width: 100%; }
    .bio { font-size: 16px; }
    .content h1 { font-size: 24px; }
}