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

:root {
    --bg-color: #faf9f7;
    --bg-secondary: #f5f4f1;
    --text-primary: #1a1a1a;
    --text-secondary: #6b6b6b;
    --text-tertiary: #999999;
    --accent-color: #c45c3e;
    --border-color: #e5e4e1;
    --max-width: 720px;
    --max-width-wide: 900px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 17px;
    font-weight: 400;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(250, 249, 247, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.flag-logo {
    width: 36px;
    height: auto;
}

.logo {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.logo:hover {
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 450;
    transition: color 0.2s ease;
}

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

/* Main Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
}

/* Hero Section */
.hero {
    margin-bottom: 5rem;
    padding-bottom: 4rem;
    border-bottom: 1px solid var(--border-color);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 0.75rem;
}

.hero-tagline {
    font-size: 1.1rem;
    color: var(--text-tertiary);
    max-width: 540px;
    line-height: 1.6;
}

/* Sections */
.section {
    margin-bottom: 4rem;
}

.section h2 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    margin-bottom: 1.5rem;
}

.section p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.25rem;
}

.section-intro {
    margin-bottom: 2rem;
}

/* About Section with Headshot */
.about-content {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.headshot {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center 20%;
    flex-shrink: 0;
}

.about-text p:last-child {
    margin-bottom: 0;
}

/* Expertise Grid */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.expertise-card {
    padding: 1.5rem;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    transition: transform 0.2s ease;
}

.expertise-card:hover {
    transform: translateY(-2px);
}

.expertise-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.expertise-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 0;
    line-height: 1.6;
}

/* Projects Grid */
.projects-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.project-card {
    display: block;
    padding: 1.75rem;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
    gap: 1rem;
}

.project-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.project-card:hover h3 {
    color: var(--accent-color);
}

.project-tag {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.6rem;
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.project-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 1rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tech span {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-tertiary);
}

.project-tech span:not(:last-child)::after {
    content: '·';
    margin-left: 0.5rem;
    color: var(--border-color);
}

/* Publications */
.publication-list {
    list-style: none;
    margin-top: 1rem;
}

.publication-item {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border-color);
}

.publication-item:last-child {
    border-bottom: none;
}

.pub-authors {
    display: block;
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-bottom: 0.25rem;
}

.pub-title {
    display: block;
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 0.25rem;
    line-height: 1.5;
}

.pub-venue {
    display: block;
    font-size: 0.9rem;
    color: var(--text-tertiary);
    font-style: italic;
}

.inline-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.2s ease;
}

.inline-link:hover {
    opacity: 0.8;
}

/* Contact */
.contact-link {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.875rem 1.75rem;
    background-color: var(--text-primary);
    color: var(--bg-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: 6px;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.contact-link:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

/* Footer */
.footer {
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-flag {
    width: 48px;
    height: auto;
}

.footer-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.footer-copyright {
    font-weight: 500;
    color: var(--text-secondary);
}

.footer-legal {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

/* ========================================
   PROJECT PAGE STYLES
   ======================================== */

.project-hero {
    padding-top: 1rem;
    margin-bottom: 3rem;
}

.back-link {
    display: inline-block;
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 450;
    margin-bottom: 2rem;
    transition: color 0.2s ease;
}

.back-link:hover {
    color: var(--text-primary);
}

.project-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    line-height: 1.2;
}

.project-meta {
    font-size: 1rem;
    color: var(--text-tertiary);
}

/* Findings Grid */
.findings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.finding-card {
    padding: 1.25rem;
    background-color: var(--bg-secondary);
    border-radius: 8px;
}

.finding-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.finding-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0;
    line-height: 1.6;
}

/* Figure Container */
.figure-container {
    margin: 2rem 0;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
}

.figure-container img {
    width: 100%;
    height: auto;
    display: block;
}

.figure-caption {
    padding: 1rem 1.25rem;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    line-height: 1.6;
    margin-bottom: 0;
    border-top: 1px solid var(--border-color);
}

/* Tech List */
.tech-list {
    list-style: none;
    margin-top: 1rem;
}

.tech-list li {
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.tech-list li:last-child {
    border-bottom: none;
}

.tech-list strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Tech Tags */
.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tech-tags span {
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.4rem 0.8rem;
    background-color: var(--bg-secondary);
    border-radius: 4px;
    color: var(--text-secondary);
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
    .nav-content {
        padding: 1rem 1.5rem;
    }

    .nav-links {
        gap: 1.5rem;
    }

    .nav-links a {
        font-size: 0.9rem;
    }

    .container {
        padding: 7rem 1.5rem 3rem;
    }

    .hero {
        margin-bottom: 3rem;
        padding-bottom: 3rem;
    }

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

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

    .project-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .about-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .headshot {
        width: 140px;
        height: 140px;
    }
}

@media (max-width: 480px) {
    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 2rem;
    }

    .project-title {
        font-size: 1.5rem;
    }
}