/* ========== ROOT & GLOBAL STYLES ========== */
:root {
    --ink: #1c1c1c;
    --muted: #5a5a5a;
    --accent: #0b3a65;
    --paper: #f7f5f1;
    --rule: #d8d4cc;
    --canvas: #fff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Cormorant Garamond", "Times New Roman", serif;
    background: var(--paper);
    color: var(--ink);
    line-height: 1.7;
}

html {
    scroll-behavior: smooth;
}

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

a:hover {
    text-decoration: underline;
}

.page {
    max-width: 980px;
    margin: 0 auto;
    padding: 48px 24px 80px;
}

/* ========== NAVIGATION ========== */
.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--paper);
    padding-top: 12px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--rule);
    margin-bottom: 32px;
}

section[id] {
    scroll-margin-top: 90px;
}

.nav a {
    font-family: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

/* ========== TYPOGRAPHY ========== */
h1 {
    font-size: 2.6rem;
    margin: 0 0 6px;
    font-weight: 600;
}

h2 {
    font-size: 1.6rem;
    margin: 48px 0 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--rule);
}

h3 {
    margin: 0 0 8px;
    font-size: 1.1rem;
    font-weight: 600;
}

.subtitle,
.institution {
    font-family: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
    color: var(--muted);
    margin: 0 0 6px;
}

/* ========== BUTTONS ========== */
.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 16px 0 12px;
}

.btn {
    padding: 8px 14px;
    border: 1px solid var(--accent);
    color: var(--accent);
    font-family: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    cursor: pointer;
    background: transparent;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn:hover {
    opacity: 0.8;
    text-decoration: none;
}

/* ========== SOCIAL LINKS ========== */
.social-links {
    display: flex;
    gap: 12px;
    font-family: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
}

/* ========== ABOUT SECTION ========== */
.about-content,
.contact-content {
    display: grid;
    gap: 24px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.stat-card {
    border: 1px solid var(--rule);
    padding: 12px 14px;
    text-align: center;
    background: #fff;
}

.highlight-list {
    margin: 8px 0 0 16px;
}

/* ========== RESEARCH & PROJECTS ========== */
.research-grid,
.projects-grid {
    display: grid;
    gap: 16px;
}

.research-card {
    border-left: 3px solid var(--accent);
    padding: 12px 16px;
    background: #fff;
}

.project-card,
.publication-item {
    border-left: 3px solid var(--accent);
    padding: 12px 16px;
    background: #fff;
    display: flex;
    gap: 16px;
    align-items: flex-start;
    text-align: left;
}

/* ========== PUBLICATIONS ========== */
.publication-category {
    margin-top: 24px;
}

.publication-item + .publication-item {
    margin-top: 12px;
}

.pub-title {
    font-weight: 600;
    margin: 0 0 4px;
}

.pub-authors,
.pub-venue {
    color: var(--muted);
    margin: 0 0 4px;
    font-size: 0.95rem;
}

.pub-stats {
    margin: 6px 0 0;
    font-family: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
    font-size: 0.85rem;
    color: var(--muted);
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border: 1px solid var(--rule);
    margin-right: 6px;
}

.pub-link {
    display: inline-block;
    margin-top: 6px;
    font-family: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
    font-size: 0.85rem;
}

.project-dates {
    color: var(--muted);
    font-size: 0.9rem;
    margin: 4px 0;
}

.project-budget {
    color: var(--accent);
    font-weight: 600;
    margin-top: 8px;
}

/* ========== CONTACT ========== */
.contact-list,
.social-list {
    margin: 0;
    padding-left: 18px;
}

/* ========== FOOTER ========== */
.footer {
    margin-top: 64px;
    padding-top: 16px;
    border-top: 1px solid var(--rule);
    font-family: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
    color: var(--muted);
    font-size: 0.9rem;
}

/* ========== IMAGES ========== */
.profile-picture {
    width: 180px;
    height: 180px;
    border-radius: 8px;
    object-fit: cover;
    margin: 0 auto 24px;
    border: 1px solid var(--rule);
    display: block;
}

.hero {
    text-align: center;
}

.pub-figure {
    width: 150px;
    min-width: 150px;
    height: 150px;
    object-fit: contain;
    background: var(--canvas);
    padding: 8px;
    border-radius: 4px;
    border: 1px solid var(--rule);
    display: block;
    flex-shrink: 0;
}

.proj-figure {
    width: 150px;
    min-width: 150px;
    height: 150px;
    object-fit: contain;
    background: var(--canvas);
    padding: 8px;
    border-radius: 4px;
    border: 1px solid var(--rule);
    display: block;
    flex-shrink: 0;
}

.publication-content,
.project-content {
    flex: 1;
    min-width: 0;
}

/* ========== RESPONSIVE DESIGN ========== */
@media (max-width: 700px) {
    .nav {
        gap: 12px;
    }

    h1 {
        font-size: 2.1rem;
    }

    .publication-item,
    .project-card {
        flex-direction: column;
    }

    .pub-figure,
    .proj-figure {
        width: 100%;
        max-width: 300px;
        margin: 0 auto 12px;
    }

    .pub-figure,
    .proj-figure {
        height: auto;
        aspect-ratio: 1 / 1;
    }
}

/* ========== ANIMATIONS ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}