@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Playfair+Display:wght@600&display=swap');

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

:root {
    --bg-gradient-start: #f6f7fb;
    --bg-gradient-end: #eef4fb;
    --surface: rgba(255, 255, 255, 0.92);
    --surface-strong: #ffffff;
    --text-primary: #102145;
    --text-secondary: #2d3d60;
    --muted: #6a7aa5;
    --accent: #4f8cc9;
    --accent-soft: rgba(79, 140, 201, 0.12);
    --border: rgba(22, 54, 108, 0.08);
    --shadow: 0 20px 40px rgba(16, 33, 69, 0.08);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 12px;
    --content-width: min(1100px, 92vw);
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(160deg, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
}

a {
    color: inherit;
}

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

.container {
    width: var(--content-width);
    margin: 0 auto;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(16px);
    background: rgba(246, 247, 251, 0.92);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(16, 33, 69, 0.06);
}

nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 0;
}

.logo {
    font-family: 'Playfair Display', 'Times New Roman', serif;
    font-size: 1.3rem;
    letter-spacing: 0.03em;
    text-decoration: none;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.nav-link {
    position: relative;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--muted);
    transition: color 0.2s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.2s ease;
    border-radius: 999px;
}

.nav-link:hover,
.nav-link:focus {
    color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link:focus::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link.active {
    color: var(--text-primary);
}

main {
    padding-top: 140px;
    padding-bottom: 80px;
}

.hero {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 3.5rem clamp(2rem, 4vw, 4.5rem);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(79, 140, 201, 0.16), transparent 50%);
    pointer-events: none;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.75rem;
    background: var(--accent-soft);
    color: var(--accent);
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero h1 {
    font-family: 'Playfair Display', 'Times New Roman', serif;
    font-size: clamp(2.5rem, 5vw, 3.6rem);
    line-height: 1.1;
    margin-top: 1.5rem;
    margin-bottom: 1.25rem;
}

.hero p {
    font-size: 1.05rem;
    max-width: 60ch;
    color: var(--text-secondary);
}

.hero-actions {
    margin-top: 2.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.6rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid transparent;
    cursor: pointer;
}

.button-primary {
    background: var(--accent);
    color: #ffffff;
    box-shadow: 0 14px 30px rgba(79, 140, 201, 0.35);
}

.button-primary:hover,
.button-primary:focus {
    transform: translateY(-2px);
    box-shadow: 0 18px 40px rgba(79, 140, 201, 0.4);
}

.button-secondary {
    background: transparent;
    border-color: rgba(79, 140, 201, 0.3);
    color: var(--text-primary);
}

.button-secondary:hover,
.button-secondary:focus {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.hero-highlights {
    margin-top: 3rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
    list-style: none;
}

.hero-highlights li {
    background: var(--surface-strong);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    border: 1px solid var(--border);
    box-shadow: 0 12px 24px rgba(16, 33, 69, 0.05);
}

.highlight-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-bottom: 0.5rem;
}

.highlight-detail {
    font-weight: 600;
    color: var(--text-primary);
}

.section {
    margin-top: 3.5rem;
}

.section-header {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-bottom: 2.5rem;
}

.section-title {
    font-family: 'Playfair Display', 'Times New Roman', serif;
    font-size: 2rem;
}

.section-subtitle {
    color: var(--text-secondary);
    max-width: 60ch;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.info-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 2rem;
    border: 1px solid var(--border);
    box-shadow: 0 12px 26px rgba(16, 33, 69, 0.07);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.info-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.info-card p {
    color: var(--text-secondary);
    font-size: 0.98rem;
}

.meta {
    font-size: 0.85rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.timeline {
    position: relative;
    padding-left: 1.5rem;
    border-left: 2px solid rgba(79, 140, 201, 0.2);
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.timeline-entry {
    position: relative;
    padding-left: 0.5rem;
}

.timeline-entry::before {
    content: '';
    position: absolute;
    left: -1.7rem;
    top: 0.3rem;
    width: 0.85rem;
    height: 0.85rem;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 0 6px var(--accent-soft);
}

.entry-heading {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    align-items: center;
    margin-bottom: 0.5rem;
}

.entry-role {
    font-weight: 600;
    color: var(--text-primary);
}

.entry-time {
    font-size: 0.85rem;
    color: var(--muted);
}

.entry-location {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

blockquote {
    margin: 2.5rem 0 1.5rem;
    padding: 1.5rem 2rem;
    border-left: 4px solid var(--accent);
    background: rgba(79, 140, 201, 0.08);
    border-radius: var(--radius-sm);
    font-style: italic;
    color: var(--text-secondary);
}

.page-hero {
    background: transparent;
    box-shadow: none;
    padding: 0;
}

.page-hero h1 {
    font-size: clamp(2.1rem, 4vw, 3rem);
}

.page-content {
    display: grid;
    gap: 2.5rem;
}

.research-list {
    display: grid;
    gap: 1.5rem;
}

.research-item {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 2rem;
    border: 1px solid var(--border);
    box-shadow: 0 12px 26px rgba(16, 33, 69, 0.07);
}

.research-item h3 {
    font-size: 1.15rem;
    margin-bottom: 0.35rem;
    color: var(--text-primary);
}

.research-item p {
    color: var(--text-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.contact-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 2rem;
    border: 1px solid var(--border);
    box-shadow: 0 12px 26px rgba(16, 33, 69, 0.07);
}

.contact-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.6rem;
    color: var(--text-primary);
}

.contact-card p,
.contact-card a {
    font-size: 0.98rem;
    color: var(--text-secondary);
    text-decoration: none;
}

.contact-card a:hover,
.contact-card a:focus {
    color: var(--accent);
}

footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.9rem;
    backdrop-filter: blur(8px);
    text-align: center;
}

footer .container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

footer span {
    color: var(--accent);
}

@media (max-width: 840px) {
    nav .container {
        gap: 1.5rem;
        flex-direction: column;
    }

    .nav-links {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero {
        padding: 2.75rem 2rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

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

@media (max-width: 520px) {
    .hero {
        padding: 2.5rem 1.6rem;
        border-radius: 22px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    main {
        padding-top: 160px;
    }
}