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

body {
    font-family: 'Avenir', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    color: #181818;
    background: #fff;
    line-height: 1.6;
    font-size: 16px;
}

a {
    color: #216190;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Header / Navigation */
header {
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    padding: 30px 0 20px;
}

.header-inner {
    max-width: 1060px;
    margin: 0 auto;
    padding: 0 30px;
}

.site-title {
    font-family: 'Raleway', 'Avenir', sans-serif;
    font-weight: 300;
    font-size: 28px;
    color: #181818;
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.site-title a {
    color: #181818;
    text-decoration: none;
}

.site-subtitle {
    font-size: 14px;
    color: #555;
    font-weight: 300;
    letter-spacing: 0.5px;
    margin-bottom: 18px;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 24px;
}

nav a {
    font-size: 14px;
    color: #181818;
    text-decoration: none;
    letter-spacing: 0.3px;
    padding: 4px 0;
}

nav a:hover {
    color: #216190;
}

nav a.active {
    color: #216190;
    border-bottom: 2px solid #216190;
}

/* Main content */
main {
    max-width: 1060px;
    margin: 0 auto;
    padding: 40px 30px 60px;
}

/* Home page layout */
.home-layout {
    display: flex;
    gap: 50px;
    align-items: flex-start;
}

.home-photo {
    flex-shrink: 0;
}

.home-photo img {
    width: 320px;
    border-radius: 4px;
}

.home-text {
    flex: 1;
}

.home-text h1 {
    font-family: 'Raleway', 'Avenir', sans-serif;
    font-weight: 300;
    font-size: 32px;
    color: #181818;
    margin-bottom: 6px;
}

.home-text .affiliation {
    font-size: 17px;
    color: #181818;
    margin-bottom: 20px;
}

.home-text p {
    margin-bottom: 14px;
    font-size: 15px;
    line-height: 1.7;
    color: #333;
}

.home-section {
    margin-top: 30px;
}

.home-section h2 {
    font-family: 'Raleway', 'Avenir', sans-serif;
    font-weight: 400;
    font-size: 18px;
    color: #181818;
    margin-bottom: 8px;
    letter-spacing: 0.3px;
}

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

.home-section li {
    font-size: 15px;
    color: #333;
    margin-bottom: 4px;
}

/* Contact section */
.contact-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.contact-section {
    text-align: center;
}

.contact-section h2 {
    font-family: 'Raleway', 'Avenir', sans-serif;
    font-weight: 400;
    font-size: 18px;
    color: #181818;
    margin-bottom: 8px;
}

.contact-section p {
    font-size: 15px;
    color: #333;
    line-height: 1.7;
}

/* Publications & Working Papers */
.page-title {
    font-family: 'Raleway', 'Avenir', sans-serif;
    font-weight: 300;
    font-size: 32px;
    color: #181818;
    margin-bottom: 35px;
    letter-spacing: 0.5px;
}

.paper {
    margin-bottom: 35px;
}

.paper-title {
    font-weight: 600;
    font-size: 16px;
    color: #181818;
    margin-bottom: 3px;
}

.paper-title a {
    color: #181818;
}

.paper-title a:hover {
    color: #216190;
}

.paper-journal {
    font-style: italic;
    font-size: 15px;
    color: #555;
    margin-bottom: 4px;
}

.paper-authors {
    font-size: 14px;
    color: #666;
    margin-bottom: 6px;
}

.paper-status {
    font-size: 14px;
    color: #216190;
    font-style: italic;
    margin-bottom: 6px;
}

.paper-details {
    margin-bottom: 8px;
}

.paper-details summary {
    font-size: 13px;
    color: #216190;
    cursor: pointer;
    list-style: none;
    user-select: none;
}

.paper-details summary::-webkit-details-marker {
    display: none;
}

.paper-details summary::before {
    content: '▸ ';
}

.paper-details[open] summary::before {
    content: '▾ ';
}

.paper-details summary:hover {
    text-decoration: underline;
}

.paper-abstract {
    font-size: 14px;
    color: #444;
    line-height: 1.65;
    margin-top: 6px;
    margin-bottom: 8px;
}

.paper-links {
    font-size: 13px;
}

.paper-links a {
    color: #216190;
    margin-right: 12px;
}

.paper-links a:hover {
    text-decoration: underline;
}

.paper-media {
    font-size: 13px;
    color: #888;
    margin-top: 4px;
}

.paper-media a {
    color: #216190;
}

.paper-award {
    font-size: 14px;
    color: #b8860b;
    font-style: italic;
    margin-top: 4px;
}

/* Footer */
footer {
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    padding: 20px 0;
    text-align: center;
}

footer p {
    font-size: 13px;
    color: #999;
}

/* Responsive */
@media (max-width: 700px) {
    .home-layout {
        flex-direction: column;
        gap: 25px;
    }

    .home-photo img {
        width: 180px;
    }

    main {
        padding: 25px 20px 40px;
    }

    .header-inner {
        padding: 0 20px;
    }

    nav {
        gap: 4px 16px;
    }

    .site-title {
        font-size: 22px;
    }
}