* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: #fff;
    color: #222;
    font-family: Georgia, "Times New Roman", Times, serif;
    font-size: 16px;
    line-height: 1.7;
}

a {
    color: #1b4f8a;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 920px;
    margin: 0 auto;
    padding: 28px 24px 40px;
}

.layout {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 2.5rem;
    align-items: start;
}

.sidebar {
    position: sticky;
    top: 28px;
}

.sidebar h1 {
    margin: 0 0 1rem;
    font-size: 1.7rem;
    font-weight: normal;
    color: #111;
}

.side-nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.side-nav li {
    margin-bottom: 0.55rem;
}

.side-nav a {
    color: #1b4f8a;
}

.main {
    width: 100%;
}

.section {
    margin-bottom: 2.5rem;
}

.section h2 {
    margin: 0;
    margin-bottom: 1rem;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid #d7d7d7;
    font-size: 1.45rem;
    font-weight: normal;
    color: #111;
}

.pub-note {
    font-size: 0.95rem;
    color: #666;
    margin-left: 0.4rem;
}

.pub-group {
    margin-bottom: 1.25rem;
}

.pub-group h3 {
    margin: 0 0 0.6rem;
    font-size: 1.1rem;
    font-weight: normal;
    color: #111;
}

.pub-list {
    margin: 0;
    padding-left: 1.25rem;
}

.pub-list li {
    margin-bottom: 0.9rem;
}

.pub-list p {
    margin: 0;
}

.profile {
    margin-bottom: 1.5rem;
}

.profile-info h2 {
    margin: 0 0 0.5rem;
    font-size: 1.5rem;
    font-weight: normal;
    color: #111;
}

.institution,
.contact-links {
    margin: 0 0 0.45rem;
}

.bio h3,
.research-interests h3,
.publication-item h3 {
    margin: 0 0 0.75rem;
    font-size: 1.1rem;
    font-weight: normal;
    color: #111;
}

.bio p,
.publication-item p {
    margin: 0 0 0.65rem;
}

.welcome {
    color: #7d1f1f;
}

.research-interests ul {
    margin: 0;
    padding-left: 1.2rem;
}

.research-interests li {
    margin-bottom: 0.35rem;
}

.news-list {
    width: 100%;
}

.news-item {
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 1rem;
    padding: 0.45rem 0;
}

.news-item.collapsed {
    display: none;
}

.news-date {
    color: #444;
}

.news-content {
    color: #222;
}

.toggle-btn {
    margin-top: 0.75rem;
    padding: 0;
    border: 0;
    background: transparent;
    color: #1b4f8a;
    font: inherit;
    cursor: pointer;
}

.toggle-btn:hover {
    text-decoration: underline;
}

.publications-list {
    display: block;
}

.publication-item {
    margin-bottom: 1.35rem;
}

.publication-item:last-child {
    margin-bottom: 0;
}

.publication-item h3 {
    margin-top: 1.1rem;
}

.footer {
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid #d7d7d7;
    color: #666;
    font-size: 0.95rem;
}

@media (max-width: 700px) {
    .container {
        padding: 22px 16px 32px;
    }

    .layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    .news-item {
        grid-template-columns: 1fr;
        gap: 0.2rem;
    }
}