:root {
    --color-primary: #37352f;
    --color-secondary: #37352f;
    --color-accent: #37352f;
    --color-text: #37352f;
    --color-text-light: #7d7c78;
    --color-background: #ffffff;
    --color-background-alt: #f7f6f3;
    --color-border: #e0e0e0;
    --font-primary: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-secondary: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    --max-width: 900px;
    --spacing-unit: 1rem;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-secondary);
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-background);
}

/* Header & Navigation */
header {
    border-bottom: 1px solid var(--color-border);
    background: var(--color-background);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-name {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
}

nav ul {
    list-style: none;
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
}

nav ul a {
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: 400;
    transition: color 0.2s;
}

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

/* Main Content */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 1.5);
}

h1 {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

h2 {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-top: calc(var(--spacing-unit) * 2.5);
    margin-bottom: var(--spacing-unit);
    padding-bottom: calc(var(--spacing-unit) * 0.5);
    border-bottom: 2px solid var(--color-border);
}

h3 {
    font-family: var(--font-primary);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

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

a {
    color: var(--color-accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Home Page - New Layout */
.home-page {
    background: var(--color-background);
}

.home-page main.home-layout {
    max-width: none;
    display: grid;
    grid-template-columns: 38% 1fr;
    gap: 0;
    padding: 0;
    min-height: 100vh;
}

.hero-image {
    position: fixed;
    top: 0;
    left: 0;
    width: 38%;
    height: 100vh;
    overflow: hidden;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
}

.hero-content {
    grid-column: 2;
    padding: 0;
    display: flex;
    flex-direction: column;
}

/* Name Header with left border */
.name-header {
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 3);
    padding-left: calc(var(--spacing-unit) * 2);
    border-left: 3px solid var(--color-border);
    margin-left: calc(var(--spacing-unit) * 3);
    border-bottom: none;
    position: static;
    background: transparent;
}

.name-header span {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text);
}

.content-body {
    padding: calc(var(--spacing-unit) * 2.5) calc(var(--spacing-unit) * 3);
    flex: 1;
    max-width: 600px;
}

.title-block {
    border-bottom: none;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.title-block .role {
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-light);
    margin-bottom: 0.25rem;
}

.title-block .department {
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-light);
    margin-bottom: 0;
}

.interests {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.interests p {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.125rem;
    line-height: 1.5;
}

.bio {
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.bio p {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--color-text);
}

.bio a {
    color: var(--color-text);
    text-decoration: underline;
}

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

/* Site Navigation on Home Page */
.site-nav {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: calc(var(--spacing-unit) * 2.5);
    padding-top: calc(var(--spacing-unit) * 2);
    border-top: 1px solid var(--color-border);
    align-items: start;
}

.nav-section {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.site-nav h2 {
    font-family: var(--font-primary);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-light);
    margin: 0 0 calc(var(--spacing-unit) * 1) 0;
    padding: 0;
    border: none;
    text-decoration: underline;
    text-underline-offset: 4px;
}

.nav-links {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 0.5);
}

.site-nav a {
    font-family: var(--font-secondary);
    color: var(--color-text);
    text-decoration: underline;
    font-size: 1.25rem;
    font-weight: 400;
    line-height: 1.5;
}

.site-nav a:hover {
    color: var(--color-text-light);
}

.home-page footer {
    display: none;
}

/* Home Page Responsive */
@media (max-width: 900px) {
    .home-page main.home-layout {
        grid-template-columns: 1fr;
    }

    .hero-image {
        position: relative;
        width: 100%;
        height: 50vh;
    }

    .hero-content {
        grid-column: 1;
    }

    .name-header {
        margin-left: var(--spacing-unit);
    }

    .content-body {
        padding: calc(var(--spacing-unit) * 2);
    }

    .site-nav {
        grid-template-columns: 1fr;
        gap: calc(var(--spacing-unit) * 2);
    }
}

/* Project Grid */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing-unit) * 1.5);
    margin-top: var(--spacing-unit);
}

.project-card {
    padding: calc(var(--spacing-unit) * 1.5);
    background: var(--color-background-alt);
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

.project-card h3 {
    margin-bottom: calc(var(--spacing-unit) * 0.75);
}

.project-card p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.project-link {
    font-size: 0.9rem;
    font-weight: 600;
}

.more-link {
    margin-top: calc(var(--spacing-unit) * 1.5);
    text-align: right;
}

/* Research Page */
.research-section {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.research-item {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    padding-left: var(--spacing-unit);
    border-left: 3px solid var(--color-border);
}

.research-item h3 {
    margin-bottom: calc(var(--spacing-unit) * 0.25);
}

.research-item p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* Publications Page */
.pub-section {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.pub-list {
    list-style: none;
}

.pub-list li {
    margin-bottom: calc(var(--spacing-unit) * 1.25);
    padding-left: calc(var(--spacing-unit) * 1.5);
    position: relative;
}

.pub-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

.pub-title {
    font-weight: 600;
    color: var(--color-text);
}

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

.pub-venue {
    font-style: italic;
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* CV Page */
.cv-section {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.cv-download {
    display: inline-block;
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
    background: var(--color-primary);
    color: white;
    border-radius: 4px;
    font-weight: 600;
    transition: background 0.2s;
}

.cv-download:hover {
    background: var(--color-secondary);
    text-decoration: none;
}

.contact-info {
    background: var(--color-background-alt);
    padding: calc(var(--spacing-unit) * 1.5);
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

.contact-info dt {
    font-weight: 600;
    color: var(--color-secondary);
    margin-top: var(--spacing-unit);
}

.contact-info dt:first-child {
    margin-top: 0;
}

.contact-info dd {
    margin-left: 0;
}

/* Footer */
footer {
    border-top: 1px solid var(--color-border);
    padding: calc(var(--spacing-unit) * 1.5);
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-top: calc(var(--spacing-unit) * 3);
}

/* Responsive */
@media (max-width: 600px) {
    nav {
        flex-direction: column;
        gap: var(--spacing-unit);
    }

    nav ul {
        gap: var(--spacing-unit);
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.25rem;
    }

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

/* Print Styles */
@media print {
    header, footer {
        display: none;
    }

    main {
        padding: 0;
    }

    a {
        color: var(--color-text);
    }

    .pub-list li::before {
        background: var(--color-text);
    }
}