/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #ffffff;
    --color-text: #0a0a0a;
    --color-accent: #1a1a1a;
    --color-subtle: #666666;
    --color-line: #e5e5e5;

    --font-display: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Arial', sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Arial', sans-serif;

    --spacing-unit: 1rem;
    --max-width: 1200px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.main-nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 2rem 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.nav-logo {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-accent);
    text-decoration: none;
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--color-subtle);
    text-decoration: none;
    transition: color 0.3s ease;
    letter-spacing: 0.01em;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-accent);
}

/* Hero Section */
.hero {
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 4rem 0;
    border-bottom: none;
}

.name {
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 15vw, 12rem);
    font-weight: 700;
    letter-spacing: -0.05em;
    line-height: 0.9;
    margin: 0;
    color: var(--color-accent);
}

.tagline {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    color: var(--color-text);
    font-weight: 400;
    letter-spacing: 0.02em;
    max-width: 600px;
    margin-bottom: 1rem;
}

.subtitle {
    font-size: clamp(0.875rem, 2vw, 1.125rem);
    color: var(--color-subtle);
    font-weight: 400;
    letter-spacing: 0.02em;
    max-width: 600px;
}

/* Physics Simulation */
.simulation-section {
    padding: 8rem 0 12rem 0;
    border-bottom: 1px solid var(--color-line);
}

.physics-canvas {
    width: 100%;
    height: 550px;
    background-color: #ffffff;
    border: 1px solid var(--color-line);
    display: block;
    cursor: crosshair;
}

.simulation-caption {
    font-size: 0.875rem;
    color: var(--color-subtle);
    margin-top: 1.5rem;
    letter-spacing: 0.02em;
    text-align: center;
}

/* Section Styles */
section {
    padding: 12rem 0;
    border-bottom: 1px solid var(--color-line);
}

section:last-of-type {
    border-bottom: none;
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: 3rem;
    margin-bottom: 5rem;
}

.section-number {
    font-size: 1rem;
    color: var(--color-subtle);
    font-weight: 300;
    letter-spacing: 0.1em;
    min-width: 3rem;
}

h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

h3 {
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.3;
    margin-bottom: 0.75rem;
}

.content {
    max-width: 800px;
    margin-left: 5rem;
}

.large-text {
    font-size: clamp(1.25rem, 3vw, 2rem);
    line-height: 1.4;
    font-weight: 400;
    margin-bottom: 2rem;
    letter-spacing: -0.01em;
}

p {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: 1.5rem;
}

/* About Section */
.about .content p:last-child {
    margin-bottom: 0;
}

.location {
    margin-top: 4rem;
}

.location-statement {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 500;
    letter-spacing: -0.01em;
    line-height: 1.4;
    margin-bottom: 1rem;
}

.location-place {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text);
    margin: 0;
}

/* Heritage Section */
.heritage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.heritage-photo {
    width: 60px;
    height: 60px;
    object-fit: cover;
    display: block;
    border: 1px solid var(--color-line);
    filter: grayscale(100%);
    margin-bottom: 1rem;
}

.heritage-item h3 {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.heritage-item .relation {
    font-size: 0.75rem;
    color: var(--color-subtle);
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.heritage-item .years {
    font-size: 0.75rem;
    color: var(--color-subtle);
    margin-bottom: 0.25rem;
}

.heritage-item .institution {
    font-size: 0.75rem;
    color: var(--color-subtle);
    letter-spacing: 0.02em;
    margin-bottom: 1rem;
}

.heritage-item p {
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-text);
}

.heritage-item p:last-child {
    margin-bottom: 0;
}

/* Work Section */
.work-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem;
    margin-bottom: 5rem;
}

.work-stat {
    text-align: left;
}

.work-stat-number {
    font-size: clamp(4rem, 8vw, 8rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 0.9;
    margin-bottom: 1rem;
}

.work-stat-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-subtle);
    font-weight: 500;
}

.impact-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
}

.impact-metric {
    text-align: left;
}

.impact-number {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 0.75rem;
}

.impact-label {
    font-size: 0.875rem;
    text-transform: lowercase;
    letter-spacing: 0.05em;
    color: var(--color-subtle);
}

/* Page Header */
.page-header {
    padding: 6rem 0 4rem 0;
    border-bottom: 1px solid var(--color-line);
}

.page-header h1 {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 1.5rem;
}

.page-intro {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: var(--color-subtle);
    max-width: 700px;
    margin-top: 2rem;
}

/* Blog Styles */
.blog-posts {
    padding: 4rem 0;
}

.blog-post {
    padding: 3rem 0;
    border-bottom: 1px solid var(--color-line);
}

.blog-post:last-child {
    border-bottom: none;
}

.post-meta {
    margin-bottom: 1rem;
}

.post-date {
    font-size: 0.875rem;
    color: var(--color-subtle);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.post-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.post-author {
    font-size: 1rem;
    color: var(--color-subtle);
}

/* Gallery Styles */
.gallery-grid {
    padding: 4rem 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.gallery-image {
    width: 100%;
    height: 280px;
    object-fit: cover;
    display: block;
    border: 1px solid var(--color-line);
}

/* Publications Styles */
.publications-list {
    padding: 4rem 0;
}

.publication {
    padding: 4rem 0;
    border-bottom: 1px solid var(--color-line);
}

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

.pub-content {
    max-width: 800px;
}

.pub-title {
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.pub-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

.pub-title a:hover {
    color: var(--color-accent);
}

.pub-meta {
    font-size: 0.875rem;
    color: var(--color-subtle);
    margin-bottom: 2rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pub-abstract {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-text);
    margin: 0;
}

/* CV Styles */
.cv-section {
    padding: 4rem 0;
    border-bottom: 1px solid var(--color-line);
}

.cv-section:last-of-type {
    border-bottom: none;
}

.cv-section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 3rem;
}

.cv-item {
    margin-bottom: 3rem;
}

.cv-item:last-child {
    margin-bottom: 0;
}

.cv-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.cv-header h3 {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    font-weight: 600;
    margin-bottom: 0;
}

.cv-date {
    font-size: 0.875rem;
    color: var(--color-subtle);
    letter-spacing: 0.02em;
}

.cv-role {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.cv-institution {
    font-size: 1rem;
    color: var(--color-subtle);
}

.cv-description {
    font-size: 0.95rem;
    color: var(--color-subtle);
    margin-top: 0.5rem;
}

.cv-award {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--color-line);
    gap: 2rem;
}

.cv-award:last-child {
    border-bottom: none;
}

.cv-award-title {
    font-size: 1.125rem;
    margin: 0;
}

.cv-year {
    font-size: 0.875rem;
    color: var(--color-subtle);
    white-space: nowrap;
}

.cv-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.cv-stat {
    text-align: center;
}

.cv-stat-number {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.cv-stat-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-subtle);
}

.cv-highlight {
    font-size: 1.125rem;
    color: var(--color-text);
    max-width: 700px;
}

.cv-publications {
    display: grid;
    gap: 1rem;
}

.cv-pub-item {
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
    padding: 0.5rem 0;
}

.cv-pub-item strong {
    font-weight: 600;
}

.cv-patents {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.cv-patent {
    padding: 0.5rem 1rem;
    background-color: #fafafa;
    border: 1px solid var(--color-line);
    font-size: 0.85rem;
    font-family: monospace;
    letter-spacing: 0.01em;
}

.cv-skills,
.cv-hobbies {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.cv-skill,
.cv-hobby {
    padding: 0.75rem 1.5rem;
    background-color: #fafafa;
    border: 1px solid var(--color-line);
    font-size: 0.9rem;
    letter-spacing: 0.01em;
}

/* Footer */
footer {
    padding: 4rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

footer p {
    font-size: 0.875rem;
    color: var(--color-subtle);
    margin: 0;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    font-size: 0.75rem;
    color: var(--color-subtle);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    main {
        padding: 0 1.5rem;
    }

    .main-nav {
        padding: 1.5rem 1.5rem 0 1.5rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }

    .nav-links {
        gap: 1.5rem;
    }

    section {
        padding: 5rem 0;
    }

    .section-header {
        flex-direction: column;
        gap: 1rem;
        margin-bottom: 2.5rem;
    }

    .content {
        margin-left: 0;
    }

    .contact-links {
        flex-direction: column;
        gap: 1.5rem;
    }

    .hero {
        min-height: 80vh;
    }

    .page-header {
        padding: 4rem 0 3rem 0;
    }

    .cv-stats {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .cv-award {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .heritage-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .publication {
        padding: 3rem 0;
    }

    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1rem;
    }

    .gallery-image {
        height: 200px;
    }

    .impact-metrics {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }

    .simulation-section {
        padding: 5rem 0 8rem 0;
    }

    .physics-canvas {
        height: 400px;
    }

    footer {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}

/* Animations */
@media (prefers-reduced-motion: no-preference) {
    .fade-in {
        opacity: 0;
        transform: translateY(20px);
        animation: fadeInUp 0.8s ease forwards;
    }

    @keyframes fadeInUp {
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

/* Print Styles */
@media print {
    .hero {
        min-height: auto;
    }

    section {
        page-break-inside: avoid;
        padding: 2rem 0;
    }
}