/* ===== Google Fonts Import ===== */
@import url('https://fonts.googleapis.com/css2?family=Lora:wght@400;500;600;700&family=Work+Sans:wght@300;400;500;600&display=swap');

/**
 * Theme: Minimalist Academic
 * Description: Clean, monochromatic design with serif headings and generous white space
 * Colors: Near-black on off-white, subtle grays
 * Typography: Lora (headings), Work Sans (body)
 */

/* ===== CSS Custom Properties ===== */
:root {
    /* Color Palette - Monochromatic */
    --color-text: #1a1a1a;              /* Near-black */
    --color-text-muted: #666666;        /* Gray */
    --color-background: #fafafa;        /* Off-white */
    --color-surface: #ffffff;
    --color-border: #e0e0e0;            /* Light gray */
    --color-border-subtle: #f0f0f0;

    /* Typography */
    --font-headings: 'Lora', 'Georgia', serif;
    --font-body: 'Work Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Courier New', monospace;

    /* Spacing Scale */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;

    /* Border Radius - Minimal */
    --radius-sm: 2px;
    --radius-md: 4px;
}

/* ===== Global Styles ===== */
body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    margin: 0;
    padding: 0;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headings);
    font-weight: 400;
    line-height: 1.3;
    color: var(--color-text);
    margin-top: 0;
}

h1 {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.75rem;
    font-weight: 400;
    margin-bottom: var(--space-md);
}

h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

h4 {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

a {
    color: var(--color-text);
    text-decoration: none;
    border-bottom: 1px solid var(--color-border);
    transition: border-color 0.2s ease;
}

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

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ===== Header / Navigation ===== */
.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-lg) 0;
    margin-bottom: var(--space-2xl);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.site-title {
    font-family: var(--font-headings);
    font-size: 1.5rem;
    font-weight: 400;
    letter-spacing: -0.01em;
}

.site-title a {
    color: var(--color-text);
    border: none;
}

.site-title a:hover {
    border: none;
}

.site-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: var(--space-lg);
}

.site-nav li {
    margin: 0;
}

.site-nav a {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--color-text-muted);
    border: none;
    transition: color 0.2s ease;
}

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

/* ===== Main Content ===== */
.main-content {
    min-height: 60vh;
    padding-bottom: var(--space-2xl);
}

/* ===== Featured Content ===== */
.featured-section {
    margin-bottom: var(--space-2xl);
    padding: var(--space-lg) 0;
}

.featured-content-header {
    margin-bottom: var(--space-md);
}

.featured-label {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.featured-title {
    font-family: var(--font-headings);
    font-size: 2rem;
    font-weight: 400;
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
}

.featured-title a {
    color: inherit;
    border: none;
}

.featured-title a:hover {
    border-bottom: 1px solid var(--color-border);
}

.featured-authors {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: 0;
    font-weight: 300;
}

.featured-authors a {
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border-subtle);
}

.featured-authors a:hover {
    border-bottom-color: var(--color-text);
}

/* Featured Content Body - Container for image and text */
.featured-content-body {
    width: 100%;
}

/* Stacked Layout (default) - Image above text */
.featured-layout-stacked .featured-image-wrapper {
    width: 100%;
    text-align: center;
    padding: var(--space-md) 0;
}

.featured-layout-stacked .featured-image-wrapper img {
    width: 100%;
    height: auto;
    max-height: 500px;
    object-fit: contain;
    display: block;
    margin: 0 auto;
}

.featured-layout-stacked .featured-content-footer {
    padding-top: var(--space-md);
}

/* Side-by-side Layout - Image and text side by side */
.featured-layout-side-by-side .featured-content-body {
    display: grid;
    grid-template-columns: var(--image-width, 50%) 1fr;
    gap: var(--space-xl);
    padding-top: var(--space-lg);
    align-items: center;
}

.featured-layout-side-by-side .featured-image-wrapper {
    width: 100%;
    text-align: center;
    padding: 0;
}

.featured-layout-side-by-side .featured-image-wrapper img {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
}

.featured-layout-side-by-side .featured-content-footer {
    padding: 0;
}

.featured-blurb {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: 0;
    text-align: justify;
}

/* ===== About Me Section ===== */
.about-me-section {
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-xl);
    align-items: start;
}

.about-me-section.text-only {
    grid-template-columns: 1fr;
}

.about-me-image {
    position: relative;
}

.about-me-image img {
    width: 100%;
    height: auto;
}

.about-me-text p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    text-align: justify;
}

.about-me-contact {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.contact-link:hover {
    background-color: var(--color-text);
    color: var(--color-surface);
    border-color: var(--color-text);
}

.contact-link i {
    font-size: 1rem;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    /* Make side-by-side layout stack on mobile */
    .featured-layout-side-by-side .featured-content-body {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .featured-title {
        font-size: 1.75rem;
    }

    .site-header .container {
        flex-direction: column;
        gap: var(--space-md);
    }

    .site-nav ul {
        gap: var(--space-md);
    }

    .about-me-section {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .about-me-contact {
        gap: var(--space-sm);
    }

    .contact-link {
        font-size: 0.8rem;
        padding: 0.3rem 0.6rem;
    }

    /* Reduce padding on mobile */
    .container {
        padding: 0 var(--space-sm);
    }

    /* Full-width carousels on mobile */
    .travel-card .carousel {
        margin-left: calc(-1 * var(--space-sm));
        margin-right: calc(-1 * var(--space-sm));
        width: calc(100% + 2 * var(--space-sm));
    }

    .travel-card .carousel-inner {
        border-left: none;
        border-right: none;
    }

    /* Full-width featured images on mobile */
    .featured-layout-stacked .featured-image-wrapper,
    .featured-layout-side-by-side .featured-image-wrapper {
        margin-left: calc(-1 * var(--space-sm));
        margin-right: calc(-1 * var(--space-sm));
        width: calc(100% + 2 * var(--space-sm));
        padding: 0 !important;
    }

    .featured-layout-stacked .featured-image-wrapper img,
    .featured-layout-side-by-side .featured-image-wrapper img {
        width: 100%;
        max-height: none;
    }
}

/* ===== Research Page ===== */
.research-section {
    margin-bottom: var(--space-2xl);
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.section-header h3 {
    font-family: var(--font-headings);
    font-size: 1.5rem;
    font-weight: 400;
    margin: 0;
}

.section-count {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 300;
}

.publication-card {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border-subtle);
}

.publication-card:last-child {
    border-bottom: none;
}

.publication-title {
    font-family: var(--font-headings);
    font-size: 1.125rem;
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 0.25rem;
}

.publication-title a {
    color: var(--color-text);
    border: none;
}

.publication-title a:hover {
    border-bottom: 1px solid var(--color-border);
}

.publication-authors {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
    font-weight: 300;
}

.publication-authors a {
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border-subtle);
}

.publication-authors a:hover {
    border-bottom-color: var(--color-text);
}

.publication-meta {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.publication-links {
    display: flex;
    gap: var(--space-md);
    margin-top: 0.5rem;
    margin-bottom: var(--space-sm);
}

.publication-link {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border-subtle);
    padding: 0;
    background: none;
    cursor: pointer;
}

.publication-link:hover {
    color: var(--color-text);
    border-bottom-color: var(--color-text);
}

.publication-abstract {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    margin-top: var(--space-md);
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-border-subtle);
}

.publication-abstract.show {
    max-height: 2000px;
}

.publication-abstract p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-text-muted);
    margin: var(--space-sm) 0;
    text-align: justify;
}

.abstract-content {
    text-align: justify;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-border-subtle);
}

.bibtex-content {
    margin-top: var(--space-sm);
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-border-subtle);
}

.bibtex-content pre {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--color-text-muted);
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.publication-bibtex {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    margin-top: var(--space-md);
}

.publication-bibtex.show {
    max-height: 1000px;
}

.publication-bibtex pre {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--color-text-muted);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--space-sm);
    margin: var(--space-sm) 0;
    overflow-x: auto;
}

.publication-extra {
    margin-top: 0.25rem;
}

.publication-extra-item {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin: 0.25rem 0;
    padding-left: var(--space-md);
    position: relative;
}

.publication-extra-item:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-text-muted);
}

/* ===== Travel Page ===== */
.travel-card {
    margin-bottom: 3rem;
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.travel-card:not(:first-child) {
    border-top: none;
}

.travel-card h3 {
    font-family: var(--font-headings);
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
}

.travel-meta {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: var(--space-md);
}

.travel-card p {
    text-align: justify;
}

.carousel-inner {
    border: 1px solid var(--color-border);
    padding: 0;
    display: flex;
    align-items: center;
}

.carousel-item {
    text-align: center;
}

.carousel-item img {
    max-width: 100%;
    max-height: 600px;
    object-fit: contain;
    display: inline-block;
    margin: 0 auto;
}

.carousel-control-prev,
.carousel-control-next {
    width: 50px;
    opacity: 0.5;
    transition: opacity 0.2s ease;
}

.carousel-control-prev {
    left: 10px;
}

.carousel-control-next {
    right: 10px;
}

.carousel-control-prev:hover,
.carousel-control-next:hover {
    opacity: 1;
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
    background-color: var(--color-text);
    width: 30px;
    height: 30px;
    border-radius: 50%;
}

.carousel-indicators {
    display: none;
}

.carousel-caption {
    background: rgba(26, 26, 26, 0.5);
    padding: 0.25rem 0.75rem;
    bottom: 0.5rem;
    left: 20%;
    right: 20%;
}

.carousel-caption p {
    font-size: 0.875rem;
    margin: 0;
}

/* ===== Footer ===== */
footer {
    margin-top: var(--space-2xl);
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}