/* ===========================
   CSS Variables
   =========================== */
:root {
    --color-primary: #2b1a17;
    --color-secondary: #65574a;
    --color-accent: #b77955;
    --color-heading: #6a1d1d;
    --color-bg: #eadfce;
    --color-bg-alt: #e2d4c2;
    --color-paper: #f6ede1;
    --color-border: #d2c4b5;
    --color-link: #a05d3a;
    --color-link-hover: #7c4025;
    
    --font-display: 'Libre Baskerville', 'Playfair Display', 'Georgia', serif;
    --font-body: 'Lora', 'Georgia', 'Garamond', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    --max-width: 900px;
    --border-radius: 2px;
    --shadow-sm: 0 1px 3px rgba(26, 22, 20, 0.08);
    --shadow-md: 0 2px 12px rgba(26, 22, 20, 0.1);
}

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

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

body {
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.75;
    color: var(--color-primary);
    background-color: var(--color-bg);
    background-image: 
        linear-gradient(135deg, rgba(201, 193, 182, 0.18) 0%, rgba(201, 193, 182, 0) 45%),
        radial-gradient(circle at 18% 22%, rgba(157, 127, 95, 0.05) 0%, transparent 38%),
        radial-gradient(circle at 82% 18%, rgba(139, 111, 79, 0.05) 0%, transparent 42%),
        radial-gradient(circle at 40% 40%, rgba(217, 211, 204, 0.35) 0%, transparent 1px),
        url("data:image/svg+xml,%3Csvg width='120' height='120' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.032 0'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='0.75'/%3E%3C/svg%3E");
    background-size: cover, cover, cover, 3px 3px, auto;
    background-position: 0 0, 0 0, 0 0, 0 0, 0 0;
    background-repeat: no-repeat, no-repeat, no-repeat, repeat, repeat;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===========================
   Typography
   =========================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-heading);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

h1 {
    font-size: 3rem;
    font-weight: 700;
}

h2 {
    font-size: 2.25rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-primary);
    font-weight: 700;
    letter-spacing: 0.02em;
}

h3 {
    font-size: 1.6rem;
    font-weight: 700;
}

h4 {
    font-size: 1.35rem;
    font-weight: 700;
}

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

a {
    color: var(--color-link);
    text-decoration: none;
    transition: all 0.2s ease;
    border-bottom: 1px solid transparent;
    font-weight: 500;
}

a:hover {
    color: var(--color-link-hover);
    border-bottom-color: var(--color-link-hover);
}

/* ===========================
   Navigation
   =========================== */
nav {
    background-color: rgba(245, 241, 235, 0.95);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-name {
    font-size: 1.125rem;
    font-weight: 700;
    margin: 0;
    font-family: var(--font-display);
    letter-spacing: 0.02em;
    color: var(--color-heading);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: var(--spacing-lg);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
}

.nav-links a {
    color: var(--color-secondary);
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    position: relative;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    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-primary);
    font-weight: 500;
}

/* ===========================
   Main Content
   =========================== */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    min-height: 80vh;
}

/* ===========================
   Home Page Intro Section
   =========================== */
.home-intro {
    padding: var(--spacing-2xl) 0;
    border-bottom: 1px solid var(--color-border);
}

.intro-layout {
    display: flex;
    gap: var(--spacing-xl);
    align-items: flex-start;
}

.profile-image-container {
    flex-shrink: 0;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    object-position: 50% 35%;
    border: 2px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.intro-content {
    flex: 1;
}

.intro-name {
    font-size: 3.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    font-family: var(--font-display);
    letter-spacing: -0.02em;
    color: var(--color-heading);
}

.intro-title {
    font-size: 1.125rem;
    color: var(--color-secondary);
    margin-bottom: 0.25rem;
    font-weight: 400;
}

.intro-affiliation {
    font-size: 1.125rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

.contact-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-sans);
    font-size: 1.05rem;
    flex-wrap: wrap;
    font-weight: 500;
}

.contact-links a {
    font-weight: 500;
}

.separator {
    color: var(--color-border);
}

/* ===========================
   Sections
   =========================== */
section {
    margin-bottom: var(--spacing-2xl);
}

.page-header {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-lg) 0;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
    letter-spacing: 0.02em;
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--color-secondary);
}

/* ===========================
   Timeline Items
   =========================== */
.timeline-item {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

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

.timeline-item.small {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
}

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

.timeline-header h3,
.timeline-header h4 {
    margin: 0;
    flex: 1;
}

.date {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-secondary);
    white-space: nowrap;
}

.degree,
.role,
.advisor,
.collaborators,
.instructor,
.location {
    color: var(--color-secondary);
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.advisor,
.collaborators,
.instructor {
    font-style: italic;
}

.details {
    list-style-position: outside;
    padding-left: 1.5rem;
    margin-top: var(--spacing-sm);
}

.details li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

/* ===========================
   Subsections
   =========================== */
.subsection-title {
    font-size: 1.5rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

/* ===========================
   Honors List
   =========================== */
.honors-list {
    list-style-position: outside;
    padding-left: 1.5rem;
}

.honors-list li {
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

/* ===========================
   Publications
   =========================== */
.publications {
    margin-top: var(--spacing-xl);
}

.publication-item {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease;
}

.publication-item:hover {
    background-color: var(--color-bg-alt);
}

.publication-item.featured {
    background-color: #f1e2d6;
    border-left: 3px solid #c05a2b;
}

.pub-year {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-accent);
    min-width: 50px;
}

.pub-content {
    flex: 1;
}

.pub-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
    font-family: var(--font-display);
    letter-spacing: -0.01em;
    color: var(--color-heading);
}

.pub-authors {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.pub-venue {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-secondary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.pub-award {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: #c05a2b;
    font-weight: 500;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.pub-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xs);
}

.pub-link {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.35rem 0.9rem;
    background-color: var(--color-bg-alt);
    border: 1.5px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.pub-link:hover {
    background-color: var(--color-primary);
    color: var(--color-paper);
    border-color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.award-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.15rem 0.55rem;
    border-radius: 12px;
    background-color: #f4e2d3;
    border: 1px solid #e4c7b2;
    color: #b44a2b;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.note {
    text-align: center;
    color: var(--color-secondary);
    font-size: 0.95rem;
    margin-top: var(--spacing-lg);
}

/* ===========================
   Footer
   =========================== */
footer {
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
}

.footer-content p {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--color-secondary);
    margin: 0;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .nav-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .nav-links {
        gap: var(--spacing-md);
    }
    
    .intro-layout {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .profile-image {
        width: 150px;
        height: 150px;
    }
    
    .contact-links {
        justify-content: center;
    }
    
    .news-list li {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .news-date {
        min-width: auto;
    }
    
    .timeline-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .publication-item {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .pub-year {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .contact-links {
        flex-wrap: wrap;
        font-size: 0.85rem;
    }
    
    main {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
}

/* ===========================
   News Section
   =========================== */
.news {
    margin-bottom: var(--spacing-2xl);
}

.news-list {
    list-style: none;
    padding: 0;
}

.news-list li {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

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

.news-date {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-accent);
    min-width: 80px;
    flex-shrink: 0;
}

.news-content {
    flex: 1;
    line-height: 1.6;
}

/* ===========================
   Selected Papers Section
   =========================== */
.selected-papers {
    margin-bottom: var(--spacing-2xl);
}

.paper-item {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease;
}

.paper-item:hover {
    background-color: var(--color-bg-alt);
}

.paper-item.featured {
    background-color: #f1e2d6;
    border-left: 3px solid #c05a2b;
    box-shadow: var(--shadow-sm);
}

.paper-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
    font-family: var(--font-display);
    letter-spacing: -0.01em;
    color: var(--color-heading);
}

.paper-authors {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.paper-venue {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.paper-award {
    color: #c05a2b;
    font-weight: 700;
}

.paper-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.paper-link {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.35rem 0.9rem;
    background-color: var(--color-bg-alt);
    border: 1.5px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.paper-link:hover {
    background-color: var(--color-primary);
    color: var(--color-paper);
    border-color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.see-all {
    text-align: center;
    margin-top: var(--spacing-lg);
    font-family: var(--font-sans);
    font-size: 1rem;
}

.see-all a {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-size: 0.9rem;
}

/* ===========================
   CV Page Specific Styles
   =========================== */
.cv-download {
    margin-top: var(--spacing-md);
    text-align: center;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 700;
    padding: 0.85rem 1.75rem;
    background-color: var(--color-primary);
    color: var(--color-paper);
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    box-shadow: var(--shadow-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.download-btn:hover {
    background-color: var(--color-link-hover);
    color: var(--color-paper);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(26, 22, 20, 0.15);
    border-bottom-color: transparent;
}

.download-icon {
    font-size: 1.25rem;
}

.cv-section {
    margin-bottom: var(--spacing-2xl);
}

.cv-item {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

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

.cv-item.compact {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
}

.cv-item.highlighted {
    background-color: #f1e2d6;
    padding: var(--spacing-md);
    border-left: 3px solid #c05a2b;
    border-bottom: 1px solid #c05a2b;
}

.cv-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.cv-header > div {
    flex: 1;
}

.cv-header h3,
.cv-header h4 {
    margin-bottom: var(--spacing-xs);
}

.cv-date {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-secondary);
    white-space: nowrap;
    align-self: flex-start;
}

.cv-degree,
.cv-role,
.cv-location,
.cv-instructor {
    font-size: 1.1rem;
    color: var(--color-secondary);
    margin-bottom: 0.25rem;
    font-weight: 600;
}

.cv-role,
.cv-instructor {
    font-style: italic;
}

.cv-details {
    list-style-position: outside;
    padding-left: 1.5rem;
    margin-top: var(--spacing-sm);
}

.cv-details li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

.cv-list {
    list-style-position: outside;
    padding-left: 1.5rem;
}

.cv-list li {
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

.cv-pub-year {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.cv-pub-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    line-height: 1.4;
    color: var(--color-heading);
}

.cv-pub-authors {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.cv-pub-venue {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-secondary);
    font-weight: 600;
}

.cv-subsection {
    font-size: 1.35rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.cv-header-inline {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--spacing-sm);
    margin-bottom: 0.25rem;
}

.cv-date-inline {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-secondary);
    white-space: nowrap;
}

.cv-footer-note {
    text-align: center;
    color: var(--color-secondary);
    font-size: 0.95rem;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

/* ===========================
   Print Styles
   =========================== */
@media print {
    nav {
        display: none;
    }
    
    .download-btn {
        display: none;
    }
    
    body {
        font-size: 12pt;
    }
    
    a {
        color: var(--color-primary);
        text-decoration: underline;
    }
}