/* Medical Research Portfolio - InTraC-inspired Design */
:root {
    /* Colors */
    --color-primary: #4A4B9A;
    --color-primary-light: #6366f1;
    --color-accent: #C43D5C;
    --color-accent-light: #e85a7a;

    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fc;
    --bg-card: #ffffff;
    --bg-code: #f1f3f9;

    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --text-muted: #718096;

    --border-color: #e2e8f0;

    /* Typography */
    --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Instrument Serif', Georgia, serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Layout */
    --max-width: 1120px;
    --max-width-narrow: 800px;
    --nav-height: 64px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #1e1e32;
    --bg-code: #252540;

    --text-primary: #f0f0f5;
    --text-secondary: #a0a5b8;
    --text-muted: #6b7280;

    --border-color: #2d2d4a;

    --color-primary-light: #818cf8;
    --color-accent-light: #f472b6;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
}

/* Noise Overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.015;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Floating Orbs */
.orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    z-index: -1;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    opacity: 0.06;
    top: -200px;
    right: -200px;
    animation: float-1 20s ease-in-out infinite;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: var(--color-accent);
    opacity: 0.05;
    bottom: -150px;
    left: -150px;
    animation: float-2 24s ease-in-out infinite;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: var(--color-primary-light);
    opacity: 0.04;
    top: 50%;
    left: 50%;
    animation: float-3 22s ease-in-out infinite;
}

@keyframes float-1 {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(30px, 20px); }
    66% { transform: translate(-20px, 30px); }
}

@keyframes float-2 {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(-25px, -15px); }
    66% { transform: translate(25px, -25px); }
}

@keyframes float-3 {
    0%, 100% { transform: translate(-50%, -50%); }
    33% { transform: translate(calc(-50% + 20px), calc(-50% - 20px)); }
    66% { transform: translate(calc(-50% - 15px), calc(-50% + 15px)); }
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
}

[data-theme="dark"] .nav {
    background: rgba(15, 15, 26, 0.85);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.theme-toggle {
    background: none;
    border: none;
    padding: var(--space-sm);
    cursor: pointer;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--color-primary);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.sun-icon { display: none; }
.moon-icon { display: block; }
[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--nav-height) + var(--space-4xl)) var(--space-xl) var(--space-4xl);
    position: relative;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

/* Binary Heart (right side) */
.binary-heart {
    position: absolute;
    right: 15%;
    top: 50%;
    transform: translateY(-50%);
    width: 700px;
    height: 630px;
    color: #9ca3af;
    opacity: 0.35;
    animation: heartPulse 5s ease-in-out infinite;
}

[data-theme="dark"] .binary-heart {
    color: #4b5563;
    opacity: 0.4;
}

@keyframes heartPulse {
    0%, 100% {
        transform: translateY(-50%) scale(1);
    }
    50% {
        transform: translateY(-50%) scale(1.015);
    }
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    animation: fadeUp 0.8s ease-out;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 8vw, 4.5rem);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.hero-tagline {
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.5;
}

.hero-links {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.hero-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    color: var(--text-muted);
    background: var(--bg-secondary);
    transition: all var(--transition-fast);
}

.hero-link:hover {
    color: var(--color-primary);
    background: var(--bg-card);
    transform: translateY(-2px);
}

.hero-link svg {
    width: 20px;
    height: 20px;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-indicator svg {
    width: 16px;
    height: 16px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
}

/* Sections */
.section {
    padding: var(--space-4xl) 0;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 400;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: var(--space-2xl);
}

.subsection-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 400;
    margin-top: var(--space-3xl);
    margin-bottom: var(--space-xl);
}

/* About */
.about-content {
    max-width: var(--max-width-narrow);
}

.about-lead {
    font-size: 1.5rem;
    font-weight: 500;
    line-height: 1.4;
    letter-spacing: -0.01em;
    margin-bottom: var(--space-lg);
}

.about-content p {
    font-size: 1.0625rem;
    font-weight: 300;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.about-content strong {
    font-weight: 500;
    color: var(--text-primary);
}

/* Research Cards */
.research {
    background: var(--bg-secondary);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.research-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.research-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(74, 75, 154, 0.08);
    border-color: var(--color-primary);
}

[data-theme="dark"] .research-card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.research-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
}

.research-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.research-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
}

.research-card p {
    font-size: 0.9375rem;
    font-weight: 300;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.project-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-decoration: none;
    transition: all var(--transition-base);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: 0 20px 40px rgba(74, 75, 154, 0.08);
}

[data-theme="dark"] .project-card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.project-icon {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.project-lang {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    color: var(--text-muted);
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-code);
    border-radius: 6px;
}

.project-lang.wip {
    background: rgba(196, 61, 92, 0.1);
    color: var(--color-accent);
}

.project-card h3 {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.project-card p {
    font-size: 0.875rem;
    font-weight: 300;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
    margin-bottom: var(--space-md);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.project-tags span {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--color-primary);
    padding: 4px var(--space-sm);
    background: rgba(74, 75, 154, 0.08);
    border-radius: 6px;
}

[data-theme="dark"] .project-tags span {
    background: rgba(99, 102, 241, 0.15);
}

.publication-code-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.publication-code-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.publication-code-item:hover {
    border-color: var(--color-primary);
}

.pub-code-name {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.pub-code-desc {
    font-size: 0.8125rem;
    font-weight: 300;
    color: var(--text-secondary);
}

.pub-code-link {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-accent);
}

.projects-cta {
    margin-top: var(--space-2xl);
    text-align: center;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 980px;
    color: var(--color-primary);
    font-size: 0.9375rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-secondary svg {
    width: 16px;
    height: 16px;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: var(--space-2xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
    border-radius: 1px;
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-xl);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--space-2xl) + 2px);
    top: 6px;
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
}

.timeline-date {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.timeline-content h3 {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 400;
    margin-bottom: var(--space-xs);
}

.timeline-org {
    font-size: 0.9375rem;
    font-weight: 300;
    color: var(--text-secondary);
}

/* Education */
.education-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.education-item {
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.education-degree {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.education-field {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.education-meta {
    font-size: 0.8125rem;
    font-weight: 300;
    color: var(--text-muted);
}

/* Publications */
.publications {
    background: var(--bg-secondary);
}

.publications-list {
    list-style: none;
    counter-reset: publication;
}

.publication-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    transition: border-color var(--transition-fast);
}

.publication-item:hover {
    border-color: var(--color-primary);
}

.publication-item::before {
    counter-increment: publication;
    content: counter(publication);
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

.publication-content {
    flex: 1;
}

.publication-authors {
    font-size: 0.8125rem;
    font-weight: 300;
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
}

.publication-title {
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: var(--space-xs);
}

.publication-journal {
    font-size: 0.875rem;
    font-weight: 300;
    color: var(--text-secondary);
}

.shared-author {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--color-accent);
}

.publication-doi {
    flex-shrink: 0;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-primary);
    border-radius: 980px;
    font-size: 0.75rem;
    font-weight: 500;
    color: white;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.publication-doi:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
}

/* Talks */
.talks-list {
    list-style: none;
}

.talks-list li {
    display: grid;
    grid-template-columns: 60px 1fr auto;
    gap: var(--space-lg);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--border-color);
}

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

.talk-year {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
}

.talk-title {
    font-size: 0.9375rem;
    font-weight: 400;
}

.talk-venue {
    font-size: 0.8125rem;
    font-weight: 300;
    color: var(--text-muted);
    text-align: right;
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2xl);
}

.skills-category h3 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-md);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.skill-tag {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 400;
    color: var(--text-primary);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Footer */
.footer {
    padding: var(--space-4xl) 0 var(--space-2xl);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
}

.footer-name {
    font-family: var(--font-serif);
    font-weight: 400;
    font-size: 1.125rem;
}

.footer-role {
    font-size: 0.875rem;
    font-weight: 300;
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    gap: var(--space-md);
}

.footer-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--text-muted);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.footer-links svg {
    width: 18px;
    height: 18px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    font-size: 0.8125rem;
    font-weight: 300;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .research-grid,
    .projects-grid,
    .publication-code-grid {
        grid-template-columns: 1fr;
    }

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

    .skills-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .publication-item {
        flex-direction: column;
    }

    .publication-doi {
        align-self: flex-start;
    }

    .talks-list li {
        grid-template-columns: 1fr;
        gap: var(--space-xs);
    }

    .talk-venue {
        text-align: left;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-lg);
    }

    .orb-1, .orb-2, .orb-3 {
        opacity: 0.03;
    }

    .binary-heart {
        width: 300px;
        height: 270px;
        right: -8%;
        opacity: 0.25;
    }
}

/* Print */
@media print {
    .nav, .theme-toggle, .scroll-indicator, .orb, body::before {
        display: none;
    }

    .section {
        opacity: 1;
        transform: none;
        padding: var(--space-xl) 0;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}