:root {
    --bg: #eef3f8;
    --bg-accent: #dfe9f5;
    --surface: rgba(255, 255, 255, 0.88);
    --surface-strong: #ffffff;
    --text: #17212b;
    --muted: #5c6b79;
    --heading: #0f1720;
    --line: rgba(23, 33, 43, 0.1);
    --line-strong: rgba(16, 35, 56, 0.18);
    --primary: #163a63;
    --primary-soft: #e6eef8;
    --accent: #916d3b;
    --shadow: 0 24px 60px rgba(19, 37, 56, 0.08);
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --button-secondary-bg: rgba(255, 255, 255, 0.7);
    --button-secondary-border: rgba(16, 35, 56, 0.18);
    --theme-toggle-bg: rgba(255, 255, 255, 0.76);
    --theme-toggle-text: #18324f;
    --published-bg: #e8f3ec;
    --published-text: #1d6b3d;
    --accepted-bg: #e8eefb;
    --accepted-text: #1e4fa3;
    --submitted-bg: #fff3e5;
    --submitted-text: #9a5617;
    --oral-bg: #f7e9ef;
    --oral-text: #a33b65;
}

:root[data-theme="dark"] {
    --bg: #0c1420;
    --bg-accent: #162334;
    --surface: rgba(15, 22, 33, 0.84);
    --surface-strong: #111a27;
    --text: #d9e2ec;
    --muted: #98a8b8;
    --heading: #f1f5f9;
    --line: rgba(158, 176, 196, 0.14);
    --line-strong: rgba(188, 204, 220, 0.2);
    --primary: #8fb7ea;
    --primary-soft: rgba(69, 107, 155, 0.22);
    --accent: #d9b47a;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
    --button-secondary-bg: rgba(18, 28, 42, 0.78);
    --button-secondary-border: rgba(188, 204, 220, 0.18);
    --theme-toggle-bg: rgba(18, 28, 42, 0.82);
    --theme-toggle-text: #dce8f4;
    --published-bg: rgba(38, 92, 59, 0.28);
    --published-text: #7fe0a2;
    --accepted-bg: rgba(49, 91, 157, 0.28);
    --accepted-text: #9ac0ff;
    --submitted-bg: rgba(137, 93, 34, 0.28);
    --submitted-text: #f0c58b;
    --oral-bg: rgba(126, 55, 87, 0.3);
    --oral-text: #f1a8ca;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text);
    font-family: "IBM Plex Sans", sans-serif;
    line-height: 1.75;
    background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.92), transparent 34%),
        radial-gradient(circle at top right, rgba(22, 58, 99, 0.08), transparent 26%),
        linear-gradient(180deg, #f6f9fc 0%, var(--bg) 48%, #f4f7fb 100%);
}

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

a:hover {
    color: #0d2847;
}

img {
    display: block;
    max-width: 100%;
}

.page-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 24px auto;
}

.site-header,
.section-card,
.site-footer {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.site-header {
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 32px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(244, 248, 252, 0.88));
    box-shadow: var(--shadow);
}

:root[data-theme="dark"] .site-header {
    background: linear-gradient(135deg, rgba(15, 22, 33, 0.92), rgba(20, 31, 46, 0.88));
}

.nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    margin-bottom: 38px;
    flex-wrap: wrap;
}

.brand {
    color: var(--heading);
    font-family: "Source Serif 4", serif;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
}

.site-nav a {
    padding: 8px 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.site-nav a:hover {
    color: var(--primary);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    padding: 10px 14px;
    border: 1px solid var(--button-secondary-border);
    border-radius: 999px;
    background: var(--theme-toggle-bg);
    color: var(--theme-toggle-text);
    font: inherit;
    font-size: 0.92rem;
    cursor: pointer;
    transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.theme-toggle:hover {
    transform: translateY(-2px);
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(220px, 0.55fr);
    gap: 32px;
    align-items: start;
}

.eyebrow,
.section-kicker {
    margin: 0 0 10px;
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.hero h1,
h2,
h3 {
    color: var(--heading);
    font-family: "Source Serif 4", serif;
}

.hero h1 {
    margin: 0;
    font-size: clamp(2.9rem, 5vw, 4.7rem);
    line-height: 0.98;
}

.hero-subtitle {
    margin: 18px 0 14px;
    max-width: 720px;
    color: var(--primary);
    font-size: 1.2rem;
    font-weight: 500;
}

.hero-description {
    max-width: 700px;
    margin: 0;
    color: var(--muted);
    font-size: 1.02rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin: 30px 0;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 132px;
    padding: 12px 18px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 600;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.button:hover {
    transform: translateY(-2px);
    text-decoration: none;
}

.button.primary {
    color: #fff;
    background: linear-gradient(135deg, #173a61, #214f82);
    box-shadow: 0 14px 30px rgba(22, 58, 99, 0.2);
}

.button.secondary {
    color: var(--primary);
    border-color: var(--button-secondary-border);
    background: var(--button-secondary-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 18px;
}

.contact-grid a,
.contact-grid span {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    font-size: 0.95rem;
}

.contact-grid i {
    width: 16px;
    color: var(--primary);
}

.hero-side {
    display: grid;
    justify-items: end;
}

.portrait-card,
.section-card,
.exchange-card {
    border: 1px solid var(--line);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.portrait-card {
    position: relative;
    overflow: hidden;
    width: min(100%, 260px);
    padding: 10px;
    border-radius: 24px;
}

.portrait-card::after {
    content: "";
    position: absolute;
    inset: auto -40px -40px auto;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, rgba(145, 109, 59, 0.14), transparent 70%);
    pointer-events: none;
}

#profile-pic {
    aspect-ratio: 1 / 1.15;
    width: 100%;
    border-radius: 18px;
    object-fit: cover;
}

.content {
    margin-top: 22px;
}

.section-card {
    margin-bottom: 22px;
    padding: 32px;
    border-radius: 30px;
}

.section-heading {
    margin-bottom: 24px;
}

h2 {
    margin: 0;
    font-size: clamp(1.9rem, 2.5vw, 2.5rem);
}

.section-note {
    margin: 10px 0 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.two-column {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
    gap: 28px;
}

.info-panel {
    display: grid;
    gap: 14px;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(246, 250, 253, 0.95), rgba(255, 255, 255, 0.95));
}

.info-row {
    display: grid;
    gap: 4px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line);
}

.info-row:last-child {
    padding-bottom: 0;
    border-bottom: 0;
}

.info-label {
    color: var(--muted);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.info-value {
    color: var(--heading);
    font-weight: 500;
}

.link-inline {
    width: fit-content;
}

.publication-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 14px;
}

.publication-item {
    padding: 18px 20px;
    border-radius: 20px;
    border: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(245, 248, 252, 0.94));
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

:root[data-theme="dark"] .publication-item,
:root[data-theme="dark"] .timeline-item,
:root[data-theme="dark"] .exchange-card,
:root[data-theme="dark"] .info-panel {
    background: linear-gradient(180deg, rgba(17, 26, 39, 0.98), rgba(20, 30, 44, 0.94));
}

.publication-item:hover,
.timeline-item:hover,
.exchange-card:hover {
    transform: translateY(-4px);
    border-color: rgba(22, 58, 99, 0.18);
    box-shadow: 0 18px 36px rgba(19, 37, 56, 0.08);
}

.publication-main {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 10px;
    align-items: flex-start;
}

.publication-title {
    color: var(--heading);
    font-size: 1.05rem;
    line-height: 1.45;
}

.publication-badge {
    display: inline-flex;
    align-items: center;
    padding: 5px 11px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    white-space: nowrap;
    border: 1px solid transparent;
}

.publication-authors,
.publication-meta {
    margin: 8px 0 0;
}

.publication-authors {
    color: var(--heading);
    font-size: 0.95rem;
}

.publication-meta,
.timeline-role,
.exchange-location {
    color: var(--muted);
}

.publication-meta {
    font-size: 0.92rem;
}

.publication-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.publication-links a {
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(22, 58, 99, 0.06);
    font-size: 0.86rem;
}

:root[data-theme="dark"] .publication-links a {
    background: rgba(143, 183, 234, 0.12);
}

.status-published {
    background: var(--published-bg);
    color: var(--published-text);
    border-color: rgba(29, 107, 61, 0.16);
}

.status-accepted {
    background: var(--accepted-bg);
    color: var(--accepted-text);
    border-color: rgba(30, 79, 163, 0.16);
}

.status-submitted {
    background: var(--submitted-bg);
    color: var(--submitted-text);
    border-color: rgba(154, 86, 23, 0.16);
}

.status-oral {
    background: var(--oral-bg);
    color: var(--oral-text);
    border-color: rgba(163, 59, 101, 0.16);
}

.timeline {
    position: relative;
    display: grid;
    gap: 18px;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 13px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, rgba(22, 58, 99, 0.25), rgba(22, 58, 99, 0.03));
}

.timeline-item {
    position: relative;
    margin-left: 36px;
    padding: 24px;
    border-radius: 24px;
    border: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(244, 248, 252, 0.92));
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -30px;
    top: 28px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--surface-strong);
    border: 4px solid var(--primary);
    box-shadow: 0 0 0 8px rgba(22, 58, 99, 0.08);
}

.timeline-top {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: baseline;
}

h3 {
    margin: 0;
    font-size: 1.35rem;
    line-height: 1.35;
}

.date {
    color: var(--primary);
    font-size: 0.92rem;
    font-weight: 600;
    white-space: nowrap;
}

ul {
    margin: 14px 0 0;
    padding-left: 20px;
}

li {
    margin-bottom: 10px;
}

.exchange-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.exchange-card {
    padding: 24px;
    border-radius: 24px;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-footer {
    margin-top: 18px;
    padding: 18px 20px 28px;
    text-align: center;
    color: var(--muted);
    font-size: 0.92rem;
}

@media (max-width: 900px) {
    .hero,
    .two-column,
    .exchange-grid {
        grid-template-columns: 1fr;
    }

    .hero-side {
        justify-items: start;
        max-width: 320px;
    }

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

@media (max-width: 720px) {
    .page-shell {
        width: min(100% - 20px, 100%);
        margin: 10px auto;
    }

    .site-header,
    .section-card {
        padding: 22px;
        border-radius: 24px;
    }

    .nav-bar,
    .timeline-top,
    .publication-main {
        flex-direction: column;
        align-items: flex-start;
    }

    .timeline::before {
        left: 10px;
    }

    .timeline-item {
        margin-left: 28px;
        padding: 20px;
    }

    .timeline-item::before {
        left: -24px;
    }
}