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

:root {
    --color-primary: #000000;
    --color-text: #222222;
    --color-muted: #555555;
    --color-light: #888888;
    --color-border: #e0e0e0;
    --color-hover: #888888;
    --color-bg: #ffffff;

    /* Single elegant serif font for everything */
    --font-main: 'EB Garamond', Georgia, 'Times New Roman', serif;

    --max-width: 1100px;
    --spacing-base: 40px;
    --spacing-section: 48px;
}

html {
    scroll-behavior: smooth;
    /* Offset in-page anchor jumps so the sticky header doesn't clip section titles */
    scroll-padding-top: 90px;
}

body {
    font-family: var(--font-main);
    font-size: 21px;
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography - all same font, different sizes */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-main);
    font-weight: 400;
    color: var(--color-primary);
    line-height: 1.2;
}

h1 {
    font-size: 4.5rem;
    margin-bottom: 2rem;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.3rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: all 0.2s ease;
}

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

strong {
    font-weight: 500;
}

em {
    font-style: italic;
}

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

nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.25rem var(--spacing-base);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.nav-brand {
    font-size: 1.2rem;
    line-height: 1.1;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-primary);
    text-decoration: none;
    white-space: nowrap;
}

.nav-brand:hover {
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

/* Language Toggle */
.lang-toggle {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.lang-btn {
    font-family: var(--font-main);
    font-size: 0.95rem;
    background: none;
    border: none;
    color: var(--color-muted);
    cursor: pointer;
    padding: 0;
    transition: color 0.2s ease;
}

.lang-btn:hover {
    color: var(--color-primary);
}

.lang-btn.active {
    color: var(--color-primary);
    font-weight: 500;
}

.lang-sep {
    color: var(--color-border);
    font-size: 0.9rem;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

.nav-menu a {
    font-size: 1.1rem;
    color: var(--color-text);
    text-decoration: none;
    padding-bottom: 2px;
    border-bottom: 1px solid transparent;
}

.nav-menu a:hover {
    text-decoration: none;
    border-bottom: 1px solid var(--color-hover);
}

.nav-menu a.active {
    border-bottom: 1px solid var(--color-hover);
}

/* Main content */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-base);
}

section {
    padding: var(--spacing-section) 0;
    border-bottom: 1px solid var(--color-border);
}

section:last-of-type {
    border-bottom: none;
}

/* Bio Section */
.bio-section {
    padding-top: 40px;
    padding-bottom: 40px;
}

.bio-container {
    display: flex;
    gap: 80px;
    align-items: flex-start;
}

.bio-image {
    flex-shrink: 0;
    width: 380px;
}

.bio-image img {
    width: 100%;
    height: auto;
    display: block;
}

.bio-content {
    flex: 1;
    /* Reserve a consistent height so switching languages (Spanish runs a line
       longer) doesn't shift the divider and the section titles below it. */
    min-height: 560px;
}

.bio-content h1 {
    font-size: 5rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
}

.intro-text {
    font-size: 1.6rem;
    line-height: 1.5;
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.intro-subtext {
    font-size: 1.2rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.bio-footer {
    border-top: 1px solid var(--color-border);
    padding-top: 1.5rem;
    margin-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.bio-note {
    font-size: 1rem;
    color: var(--color-muted);
    margin-bottom: 0;
    flex: 1;
}

/* Button */
.btn {
    display: inline-block;
    padding: 0.6rem 1.25rem;
    font-size: 1.1rem;
    font-family: var(--font-main);
    color: var(--color-primary);
    background: transparent;
    border: 1px solid var(--color-primary);
    border-radius: 20px;
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn:hover {
    background: var(--color-primary);
    color: var(--color-bg);
    text-decoration: none;
}

/* Research Section */
.research-section h2 {
    margin-bottom: 1.5rem;
}

.section-intro {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    max-width: 800px;
}

.section-intro a {
    text-decoration: underline;
    text-decoration-color: var(--color-hover);
}

/* Research Grid - 3 columns like Linus */
.research-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.research-block {
    padding-right: 1rem;
}

.research-block h3 {
    font-size: 1.4rem;
    font-weight: 400;
    margin-bottom: 1rem;
}

.research-block p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    margin-bottom: 0;
}

/* Publications Section */
.publication-list {
    margin-bottom: 2rem;
}

.publication {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--color-border);
}

.publication:first-child {
    padding-top: 0;
}

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

.pub-authors {
    font-size: 1rem;
    color: var(--color-muted);
    margin-bottom: 0.25rem;
}

.pub-title {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.pub-venue {
    font-size: 1rem;
    font-style: italic;
    color: var(--color-muted);
    margin-bottom: 0;
}

/* Media Section */
.media-section h2 {
    margin-bottom: 2.5rem;
}

.media-subsection {
    margin-bottom: 2.5rem;
}

.media-subsection h3 {
    font-size: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-muted);
    margin-bottom: 1rem;
}

.media-list {
    display: grid;
    gap: 0;
}

.media-item {
    border-bottom: 1px solid var(--color-border);
}

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

.media-item a {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.6rem 0;
    text-decoration: none;
    gap: 1rem;
}

.media-item a:hover {
    text-decoration: none;
}

.media-item a:hover .media-title {
    text-decoration: underline;
    text-decoration-color: var(--color-hover);
}

.media-title {
    font-size: 1.1rem;
    color: var(--color-primary);
    flex: 1;
}

.media-meta {
    font-size: 0.95rem;
    color: var(--color-muted);
    white-space: nowrap;
}

/* Contact Section */
.contact-section {
    text-align: center;
    padding-bottom: 40px;
}

.contact-section h2 {
    margin-bottom: 1rem;
}

.contact-section > p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

.contact-section > p a {
    text-decoration: underline;
    text-decoration-color: var(--color-hover);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.social-links a {
    color: var(--color-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}

.social-links a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.social-links svg {
    width: 24px;
    height: 24px;
}

/* Footer */
footer {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem var(--spacing-base);
    text-align: center;
    font-size: 1rem;
    color: var(--color-muted);
}

/* Responsive */
@media (max-width: 900px) {
    :root {
        --spacing-section: 40px;
        --spacing-base: 24px;
    }

    body {
        font-size: 18px;
    }

    h1 {
        font-size: 2.5rem;
    }

    .bio-container {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
    }

    .bio-image {
        width: 100%;
        max-width: 300px;
    }

    .bio-content {
        min-height: 0;
    }

    .bio-content h1 {
        font-size: 2.5rem;
    }

    .intro-text {
        font-size: 1.25rem;
    }

    .intro-subtext {
        font-size: 1.1rem;
    }

    .bio-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    nav {
        justify-content: space-between;
        gap: 1rem;
        flex-wrap: wrap;
        row-gap: 0.6rem;
    }

    .nav-links {
        gap: 1.25rem;
        flex-wrap: wrap;
        justify-content: flex-end;
    }

    .nav-menu {
        gap: 1rem;
        flex-wrap: wrap;
    }

    .nav-menu a {
        font-size: 0.95rem;
    }

    .lang-btn {
        font-size: 0.85rem;
    }

    .research-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .research-block {
        padding-right: 0;
        padding-bottom: 2rem;
        border-bottom: 1px solid var(--color-border);
    }

    .research-block:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }

    .media-item a {
        flex-direction: column;
        gap: 0.25rem;
    }

    .media-meta {
        font-size: 0.9rem;
    }
}

/* On phones, stack the menu above the language toggle (both centered) so the
   longer Spanish/Catalan labels and the EN/ES/CAT toggle always fit */
@media (max-width: 600px) {
    .nav-brand {
        display: none;
    }

    nav {
        justify-content: center;
    }

    .nav-links {
        flex: 1;
        flex-direction: column;
        align-items: center;
        gap: 0.6rem;
    }

    .nav-menu {
        justify-content: center;
    }
}