/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;1,400&family=Playfair+Display:wght@400;500;600;700&display=swap');

/* CSS Custom Properties */
:root {
    --color-bg: #faf9f6;
    --color-bg-alt: #f5f3ef;
    --color-text: #2c3e50;
    --color-text-light: #5a6c7d;
    --color-accent: #b8860b;
    --color-accent-light: #d4a84b;
    --color-pink: #e75480;
    --color-pink-light: #f2a6c2;
    --color-border: #e8e4de;
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Cormorant Garamond', Georgia, serif;
    --max-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

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

html {
    font-size: 18px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 500;
    line-height: 1.3;
    color: var(--color-text);
}

h1 {
    font-size: 3rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-sm);
}

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

a:hover {
    color: var(--color-accent-light);
}

/* Layout */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Navigation */
nav {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-bg);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-links a {
    font-family: var(--font-body);
    font-size: 1.1rem;
    color: var(--color-text);
    position: relative;
    padding-bottom: 4px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

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

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    max-width: 400px;
    height: auto;
    object-fit: cover;
    border-radius: 4px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    border: 3px solid transparent;
    transition: border-color 0.3s ease;
}

.hero-image img:hover {
    border-color: var(--color-pink);
}

.hero-text h1 {
    margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

.hero-bio {
    font-size: 1.15rem;
    margin-bottom: var(--spacing-md);
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.1rem;
    border-bottom: 1px solid var(--color-accent);
    padding-bottom: 2px;
}

/* Page Header */
.page-header {
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
    margin-bottom: var(--spacing-xs);
}

.page-header p {
    font-size: 1.2rem;
    color: var(--color-text-light);
    font-style: italic;
}

/* Research Section */
.research-section {
    padding: var(--spacing-lg) 0;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-light);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.section-title:first-of-type {
    margin-top: 0;
}

.research-paper {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border);
}

.research-paper:last-child {
    border-bottom: none;
}

.paper-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    margin-bottom: var(--spacing-xs);
}

.paper-status {
    font-size: 0.95rem;
    color: var(--color-text-light);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

.paper-abstract {
    margin-bottom: var(--spacing-md);
    font-size: 1.05rem;
}

.key-insights {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-left: 3px solid var(--color-accent);
    margin-top: var(--spacing-md);
}

.key-insights h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.key-insights ul {
    list-style: none;
}

.key-insights li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: var(--spacing-xs);
}

.key-insights li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* About Section */
.about-section {
    padding: var(--spacing-lg) 0;
}

.about-intro {
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    text-align: center;
    font-size: 1.2rem;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.about-card {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: 4px;
}

.about-card img {
    width: 100%;
    height: 350px;
    object-fit: cover;
    border-radius: 4px;
    margin-bottom: var(--spacing-md);
    border: 3px solid transparent;
    transition: border-color 0.3s ease;
}

.about-card img:hover {
    border-color: var(--color-pink);
}

.about-card h3 {
    font-family: var(--font-heading);
    margin-bottom: var(--spacing-xs);
}

.about-card p {
    color: var(--color-text-light);
    font-style: italic;
}

.hobbies {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hobbies h3 {
    margin-bottom: var(--spacing-md);
}

.hobby-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    list-style: none;
}

.hobby-list li {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 2px;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.hobby-list li:hover {
    background-color: var(--color-pink-light);
    border-color: var(--color-pink);
}

/* CV Section */
.cv-section {
    padding: var(--spacing-lg) 0;
}

.cv-download {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.download-btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-accent);
    color: white;
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 1.1rem;
    transition: background-color 0.3s ease;
}

.download-btn:hover {
    background-color: var(--color-accent-light);
    color: white;
}

.cv-viewer {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-sm);
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

/* Teaching Section */
.teaching-section {
    padding: var(--spacing-lg) 0;
}

.teaching-role {
    margin-bottom: var(--spacing-lg);
}

.role-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
}

.course-item {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
}

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

.course-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.course-header h4 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    margin: 0;
}

.course-term {
    font-style: italic;
    color: var(--color-text-light);
}

.course-program {
    color: var(--color-text-light);
    font-style: italic;
    margin-bottom: var(--spacing-xs);
}

.course-rating {
    margin-bottom: var(--spacing-sm);
}

.course-duties {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.student-feedback {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-left: 3px solid var(--color-pink);
    margin-top: var(--spacing-md);
}

.student-feedback h5 {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--color-pink);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.student-feedback blockquote {
    font-style: italic;
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-sm);
    border-left: 2px solid var(--color-border);
    color: var(--color-text-light);
}

.student-feedback blockquote:last-child {
    margin-bottom: 0;
}

/* Contact Section */
.contact-section {
    padding: var(--spacing-lg) 0;
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: 4px;
    text-align: center;
}

.contact-card h3 {
    font-family: var(--font-heading);
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.contact-card p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.contact-btn {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-accent);
    border-radius: 4px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.contact-btn:hover {
    background-color: var(--color-accent);
    color: white;
}

/* Footer */
footer {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
    margin-top: var(--spacing-lg);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

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

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

footer p {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 900px) {
    html {
        font-size: 16px;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-image {
        order: -1;
    }

    .hero-image img {
        max-width: 300px;
        margin: 0 auto;
        display: block;
    }

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

    h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 600px) {
    nav .container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .nav-links {
        gap: var(--spacing-sm);
    }

    h1 {
        font-size: 2rem;
    }

    .hero {
        min-height: auto;
        padding: var(--spacing-lg) 0;
    }
}