/* CSS Variables */
:root {
    --color-bg: #0a0a0a;
    --color-surface: #121212;
    --color-text: #e8e8e8;
    --color-text-muted: #888888;
    --color-accent: #00ff88;
    --color-accent-dim: #00cc6a;
    --color-border: #222222;
    --font-display: 'Crimson Pro', serif;
    --font-mono: 'IBM Plex Mono', monospace;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-mono);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 14px;
    overflow-x: hidden;
    position: relative;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Mathematical Background Canvas */
#mathBackground {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.03;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 0.1em;
}

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

.nav-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: var(--transition);
}

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

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 8rem 2rem 4rem;
    position: relative;
    background: 
        linear-gradient(180deg, transparent 0%, var(--color-bg) 100%),
        radial-gradient(ellipse at top, rgba(0, 255, 136, 0.05) 0%, transparent 60%);
}

.hero-content {
    text-align: center;
    max-width: 900px;
}

.hero-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 300;
    line-height: 1.1;
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

.hero-title .line {
    display: block;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.hero-title .line:nth-child(1) { animation-delay: 0.1s; }
.hero-title .line:nth-child(2) { animation-delay: 0.2s; }
.hero-title .line:nth-child(3) { 
    animation-delay: 0.3s;
    color: var(--color-accent);
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 3rem;
    line-height: 1.8;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.4s;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 3rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.5s;
}

.stat {
    text-align: center;
}

.stat-number {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 3rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.6s;
}

.btn-primary, .btn-secondary {
    padding: 1rem 2rem;
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-bg);
    border: 1px solid var(--color-accent);
}

.btn-primary:hover {
    background: transparent;
    color: var(--color-accent);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
}

.btn-secondary:hover {
    background: var(--color-accent);
    color: var(--color-bg);
    transform: translateY(-2px);
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

/* Section Styles */
.section {
    padding: 8rem 0;
    border-top: 1px solid var(--color-border);
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: 2rem;
    margin-bottom: 4rem;
}

.section-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    letter-spacing: 0.2em;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 300;
    letter-spacing: -0.02em;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
}

.about-main {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
}

.about-text p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.contact-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 2rem;
}

.contact-card h3 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition);
    padding: 0.5rem 0;
}

.contact-link:hover {
    color: var(--color-accent);
    transform: translateX(4px);
}

.contact-link svg {
    flex-shrink: 0;
}

/* Skills Section */
.skills-section {
    margin-top: 3rem;
}

.skills-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
    margin-top: 3rem;
}

.skills-title:first-child {
    margin-top: 0;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 1rem;
}

.skill-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    text-align: center;
}

.skill-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.skill-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.skill-icon img,
.skill-icon svg {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.skill-icon svg {
    fill: var(--color-accent);
}

.skill-card span {
    font-size: 0.7rem;
    color: var(--color-text);
    font-family: var(--font-mono);
}

.quant-skills {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.quant-skill-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.quant-skill-item:hover {
    border-color: var(--color-accent);
    transform: translateX(4px);
}

.quant-icon {
    font-size: 1.5rem;
    color: var(--color-accent);
    font-family: serif;
    min-width: 30px;
    text-align: center;
}

.quant-skill-item span:last-child {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* Education Section */
.education-timeline {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.education-card {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 2rem;
    padding: 2rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-accent);
    transition: var(--transition);
}

.education-card:hover {
    transform: translateX(8px);
    border-left-color: var(--color-accent);
    box-shadow: 0 8px 30px rgba(0, 255, 136, 0.1);
}

.education-logo {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.education-logo img {
    width: 100%;
    max-width: 120px;
    height: auto;
    object-fit: contain;
}

.education-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.education-header {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
}

.education-header h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.education-degree {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.education-spec {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.education-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
    text-align: right;
    min-width: 150px;
}

.education-gpa {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-accent);
    font-weight: 600;
}

.education-date {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

.courses h4 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.course-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.course-tag {
    padding: 0.4rem 0.8rem;
    background: transparent;
    border: 1px solid var(--color-border);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    transition: var(--transition);
}

.course-tag:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Experience Section */
.experience-content {
    max-width: 1000px;
}

.experience-card {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 3rem;
    padding: 3rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-accent);
    transition: var(--transition);
}

.experience-card:hover {
    box-shadow: 0 10px 40px rgba(0, 255, 136, 0.15);
}

.experience-logo {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.experience-logo img {
    width: 100%;
    max-width: 150px;
    height: auto;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.experience-header h3 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.experience-company {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.experience-team {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.experience-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
    text-align: right;
}

.experience-location {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.experience-date {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-accent);
    font-weight: 600;
}

.experience-points {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.experience-points li {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--color-text-muted);
    padding-left: 1.5rem;
    position: relative;
}

.experience-points li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

.experience-points li strong {
    color: var(--color-text);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.project-card.featured {
    grid-column: 1 / -1;
    border: 1px solid var(--color-accent);
}

.project-visual {
    position: relative;
    height: 100px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--color-accent);
    color: var(--color-bg);
    padding: 0.3rem 0.8rem;
    font-size: 0.65rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.math-visual {
    width: 100%;
    opacity: 0.5;
}

.volatility-chart {
    width: 100%;
    height: 100px;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.project-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.project-card:hover::before {
    transform: scaleX(1);
}

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

.project-title {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--color-text);
}

.project-tag {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    white-space: nowrap;
}

.project-description {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.project-date {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

.project-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

.project-link:hover {
    transform: translateX(4px);
}

/* Achievements Section */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.achievement-card {
    padding: 2rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    display: flex;
    gap: 1.5rem;
}

.achievement-card.highlight {
    border: 2px solid var(--color-accent);
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.05) 0%, transparent 100%);
}

.achievement-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 255, 136, 0.1);
}

.achievement-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.achievement-content h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 400;
    margin-bottom: 0.75rem;
}

.achievement-detail {
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.achievement-detail strong {
    color: var(--color-accent);
}

.achievement-year {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Books Section */
.books-intro {
    max-width: 800px;
    margin-bottom: 3rem;
}

.books-intro p {
    font-size: 1rem;
    color: var(--color-text-muted);
    line-height: 1.8;
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.book-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 1.5rem;
    transition: var(--transition);
    position: relative;
    padding-left: 2rem;
}

.book-spine {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--color-accent);
    opacity: 0.5;
    transition: var(--transition);
}

.book-card:hover .book-spine {
    opacity: 1;
    width: 6px;
}

.book-card:hover {
    border-color: var(--color-accent);
    transform: translateX(8px);
}

.book-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.book-author {
    font-size: 0.85rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
    font-style: italic;
}

.book-note {
    font-size: 0.8rem;
    line-height: 1.6;
    color: var(--color-text-muted);
}

/* Blog Section */
.blog-intro {
    max-width: 800px;
    margin-bottom: 3rem;
}

.blog-intro p {
    font-size: 1rem;
    color: var(--color-text-muted);
    line-height: 1.8;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.blog-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 2rem;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
}

.blog-card.featured-post {
    grid-column: 1 / -1;
    border: 1px solid var(--color-accent);
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.03) 0%, transparent 100%);
}

.blog-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--color-accent);
    color: var(--color-bg);
    padding: 0.3rem 0.8rem;
    font-size: 0.65rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.blog-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 255, 136, 0.1);
}

.blog-category {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
}

.blog-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 400;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.blog-excerpt {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--color-text-muted);
    flex: 1;
    margin-bottom: 1.5rem;
}

.blog-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
    gap: 0.5rem;
}

.blog-date,
.blog-read-time {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

.blog-link {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
    margin-left: auto;
}

.blog-link:hover {
    transform: translateX(4px);
}

/* Footer */
.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 4rem 0 2rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
}

.footer-bio {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-link {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--color-accent);
    transform: translateX(4px);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-bottom p {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

.footer-math {
    color: var(--color-accent);
    font-family: serif !important;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scrollPulse {
    0%, 100% {
        opacity: 0.3;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(10px);
    }
}

/* Responsive Design */
@media (max-width: 968px) {
    .nav-links {
        gap: 1.5rem;
    }
    
    .nav-link {
        font-size: 0.7rem;
    }
    
    .hero-stats {
        gap: 2rem;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
    }
    
    .about-main {
        grid-template-columns: 1fr;
    }

    .education-card,
    .experience-card {
        grid-template-columns: 1fr;
    }

    .education-logo,
    .experience-logo {
        justify-content: flex-start;
    }

    .education-header,
    .experience-header {
        flex-direction: column;
    }

    .education-meta,
    .experience-meta {
        align-items: flex-start;
        text-align: left;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .project-card.featured {
        grid-column: 1;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 1.5rem;
    }
    
    .nav-container {
        padding: 1rem 1.5rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .section {
        padding: 5rem 0;
    }
    
    .section-header {
        flex-direction: column;
        gap: 1rem;
        margin-bottom: 3rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }

    .quant-skills {
        grid-template-columns: 1fr;
    }

    .achievements-grid,
    .books-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }

    .blog-card.featured-post {
        grid-column: 1;
    }
}