:root {
    --text: #14213d;
    --muted: #4f5d75;
    --line: #d4def3;
    --bg: #f4f8ff;
    --card: #ffffff;
    --link: #295fd6;
    --link-hover: #1d45a1;
    --accent-soft: #eef4ff;
    --accent-warm: #fff4e6;
    --serif: "Source Serif 4", Georgia, serif;
    --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
}

a {
    color: var(--link);
    text-decoration: none;
}

a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.93);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(6px);
}

.topbar-inner {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 18px;
    min-height: 58px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.brand {
    font-family: var(--serif);
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--text);
}

.menu {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 0.93rem;
}

.menu a {
    color: var(--muted);
    font-weight: 500;
}

.menu .switch-link {
    color: var(--link);
    font-weight: 600;
}

.menu-toggle {
    display: none;
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 8px;
    width: 36px;
    height: 36px;
    color: #3a3a3a;
    cursor: pointer;
}

.page {
    max-width: 980px;
    margin: 0 auto;
    padding: 22px 18px 52px;
}

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(26, 66, 150, 0.05);
}

.hero {
    display: grid;
    grid-template-columns: 170px 1fr;
    gap: 28px;
    padding: 28px;
    background: linear-gradient(120deg, #ffffff 0%, #f5f9ff 58%, #fffaf2 100%);
}

.hero-photo img,
.hero-placeholder {
    width: 170px;
    height: 170px;
    border-radius: 10px;
    object-fit: cover;
    border: 1px solid var(--line);
}

.hero-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #8a8a8a;
    background: #f6f6f6;
}

h1 {
    margin: 0 0 6px;
    font-family: var(--serif);
    font-size: clamp(1.8rem, 3.2vw, 2.35rem);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero-role {
    margin: 0 0 4px;
    font-weight: 600;
    color: #2b2b2b;
}

.hero-affiliation {
    margin: 0 0 12px;
    color: var(--muted);
    font-size: 0.95rem;
}

.hero-tagline {
    margin: 0 0 14px;
    color: #323232;
}

.hero-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}

.hero-link-btn {
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 7px 12px;
    font-size: 0.83rem;
    font-weight: 600;
    color: #4a4a4a;
}

.hero-link-btn i {
    margin-right: 6px;
}

.about-copy p {
    margin: 0 0 10px;
    color: #2a2a2a;
}

.section {
    padding: 24px 28px 28px;
    margin-top: 18px;
}

#news {
    background: linear-gradient(180deg, #ffffff 0%, #f7faff 100%);
}

#publications {
    background: linear-gradient(180deg, #ffffff 0%, #f9fbff 100%);
}

#projects {
    background: linear-gradient(180deg, #ffffff 0%, #fff9f0 100%);
}

#cv {
    background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}

#news.section,
#publications.section,
#projects.section,
#cv.section {
    padding: 18px 22px 20px;
}

h2 {
    margin: 0 0 14px;
    font-family: var(--serif);
    font-size: 1.45rem;
    letter-spacing: -0.01em;
}

.news-table {
    width: 100%;
    border-collapse: collapse;
}

.news-table tr {
    border-top: 1px solid var(--line);
}

.news-table tr:first-child {
    border-top: none;
}

.news-table td {
    padding: 6px 4px;
    vertical-align: top;
    line-height: 1.42;
}

.news-date {
    width: 108px;
    white-space: nowrap;
    font-size: 0.75rem;
    color: #666;
    font-weight: 600;
}

.news-table td:last-child {
    font-size: 0.84rem;
}

.section-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 6px;
}

#publications .section-head h2 {
    font-size: 1.2rem;
    margin-bottom: 0;
}

#publications .section-head a {
    font-size: 0.78rem;
}

.pub-list {
    display: grid;
    gap: 4px;
}

.pub-item {
    border-top: 1px solid var(--line);
    padding-top: 4px;
}

.pub-item:first-child {
    border-top: none;
    padding-top: 0;
}

.pub-title {
    margin: 0 0 1px;
    font-size: 0.86rem;
    line-height: 1.25;
}

.pub-meta {
    margin: 0;
    color: #444;
    font-size: 0.76rem;
    line-height: 1.3;
}

.pub-venue {
    color: #666;
    font-size: 0.73rem;
}

.pub-links {
    margin-top: 0;
    font-size: 0.72rem;
}

.pub-links a {
    margin-right: 10px;
}

.project-list {
    display: grid;
    gap: 6px;
}

.project-item {
    border-top: 1px solid var(--line);
    padding-top: 6px;
}

.project-item:first-child {
    border-top: none;
    padding-top: 0;
}

.project-head {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.project-title {
    margin: 0;
    font-size: 0.9rem;
}

.project-badge {
    font-size: 0.68rem;
    font-weight: 700;
    border-radius: 999px;
    padding: 2px 8px;
    border: 1px solid #c8d7fb;
    background: var(--accent-soft);
    color: #2c56a4;
}

.project-status {
    font-size: 0.68rem;
    font-weight: 700;
    border-radius: 999px;
    padding: 2px 8px;
    border: 1px solid #f2d6ae;
    background: var(--accent-warm);
    color: #8e5200;
}

.project-tagline {
    margin: 1px 0 2px;
    color: #3e5073;
    font-size: 0.8rem;
}

.project-description {
    margin: 0;
    color: #5c6d8f;
    font-size: 0.76rem;
}

.project-links {
    margin-top: 1px;
    font-size: 0.75rem;
}

.project-links a {
    margin-right: 10px;
}

.cv-list {
    display: grid;
    gap: 5px;
}

.section-toggle-wrap {
    margin-top: 8px;
}

.section-toggle-btn {
    border: 1px solid var(--line);
    background: #fff;
    color: #444;
    border-radius: 999px;
    padding: 5px 11px;
    font-size: 0.76rem;
    font-weight: 600;
    cursor: pointer;
}

.section-toggle-btn:hover {
    border-color: #b9b9b9;
    color: #222;
}

.is-hidden {
    display: none !important;
}

.cv-item {
    border-top: 1px solid var(--line);
    padding-top: 5px;
}

.cv-item:first-child {
    border-top: none;
    padding-top: 0;
}

.cv-date {
    font-size: 0.73rem;
    color: #666;
    font-weight: 600;
}

.cv-title {
    font-size: 0.86rem;
    font-weight: 700;
}

.cv-place {
    font-size: 0.78rem;
    color: #4b4b4b;
}

.cv-description {
    margin-top: 0;
    color: #666;
    font-size: 0.75rem;
}

.footer {
    text-align: center;
    color: #767676;
    font-size: 0.82rem;
    padding: 18px;
}

@media (max-width: 780px) {
    .menu-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .menu {
        display: none;
        position: absolute;
        top: 58px;
        right: 14px;
        background: #fff;
        border: 1px solid var(--line);
        border-radius: 10px;
        padding: 8px;
        flex-direction: column;
        align-items: flex-start;
        min-width: 170px;
    }

    .menu.open {
        display: flex;
    }

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

    .hero-photo {
        text-align: center;
    }

    .hero-photo img,
    .hero-placeholder {
        width: 140px;
        height: 140px;
        margin: 0 auto;
    }

    .section {
        padding: 20px;
    }

    .news-date {
        width: 90px;
    }
}