:root {
    --bg: #ffffff;
    --bg-raised: #fafaf9;
    --bg-subtle: #f8f8f7;
    --bg-chip: #f3f3f1;
    --bg-thumb: #eeeeec;
    --border: #ececec;
    --border-subtle: #ececea;
    --text: #111111;
    --text-secondary: #666666;
    --text-muted: #999999;
    --text-faint: #888888;
    --accent: #111111;
    --accent-text: #ffffff;
    --selection-bg: #111111;
    --selection-text: #ffffff;
}

:root[data-theme="dark"] {
    --bg: #121212;
    --bg-raised: #1c1c1e;
    --bg-subtle: #1a1a1a;
    --bg-chip: #232323;
    --bg-thumb: #2a2a2a;
    --border: #2e2e2e;
    --border-subtle: #2a2a2a;
    --text: #f2f2f2;
    --text-secondary: #b0b0b0;
    --text-muted: #8a8a8a;
    --text-faint: #999999;
    --accent: #f2f2f2;
    --accent-text: #121212;
    --selection-bg: #f2f2f2;
    --selection-text: #121212;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg: #121212;
        --bg-raised: #1c1c1e;
        --bg-subtle: #1a1a1a;
        --bg-chip: #232323;
        --bg-thumb: #2a2a2a;
        --border: #2e2e2e;
        --border-subtle: #2a2a2a;
        --text: #f2f2f2;
        --text-secondary: #b0b0b0;
        --text-muted: #8a8a8a;
        --text-faint: #999999;
        --accent: #f2f2f2;
        --accent-text: #121212;
        --selection-bg: #f2f2f2;
        --selection-text: #121212;
    }
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    background: var(--bg);
    font-family: 'Work Sans', sans-serif;
    color: var(--text);
    transition: background-color 0.2s, color 0.2s;
}

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

::selection {
    background: var(--selection-bg);
    color: var(--selection-text);
}

.hidden {
    display: none !important;
}

.invisible {
    visibility: hidden !important;
}

/* NAV */
.topnav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 48px;
    flex-wrap: wrap;
    gap: 14px;
}

.brand-btn {
    border: none;
    background: none;
    cursor: pointer;
    font: 700 16px 'Space Grotesk', sans-serif;
    color: var(--text);
    padding: 0;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}

.jump-link {
    border: none;
    background: none;
    cursor: pointer;
    font: 500 13.5px 'Work Sans', sans-serif;
    color: var(--text-muted);
    padding: 0;
}

.jump-link.active {
    color: var(--text);
}

.theme-toggle {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 3px;
    border-radius: 100px;
    background: var(--bg-thumb);
    border: 1px solid var(--border);
}

.theme-toggle-option {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: none;
    background: none;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.theme-toggle-option:hover {
    color: var(--text);
}

.theme-icon {
    width: 16px;
    height: 16px;
}

:root:not([data-theme="dark"]) .theme-toggle-option[data-theme-choice="light"] {
    background: var(--bg-raised);
    color: #f5c518;
}

:root[data-theme="dark"] .theme-toggle-option[data-theme-choice="dark"] {
    background: var(--bg-raised);
    color: #ffffff;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]):not([data-theme="dark"]) .theme-toggle-option[data-theme-choice="light"] {
        background: none;
        color: var(--text-muted);
    }

    :root:not([data-theme="light"]):not([data-theme="dark"]) .theme-toggle-option[data-theme-choice="dark"] {
        background: var(--bg-raised);
        color: #ffffff;
    }
}

/* LANDING / HERO */
.page-section {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.page-section.is-landing {
    justify-content: center;
}

.hero {
    padding: 64px 0;
    width: 100%;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 70vw;
    width: 100%;
    margin: 0 auto;
}

.hero-top {
    display: flex;
    align-items: center;
    gap: 48px;
}

.hero-copy {
    flex: 1;
    min-width: 320px;
}

.hero-greeting {
    font: 500 20px 'Work Sans', sans-serif;
    color: var(--text-secondary);
    margin-bottom: 14px;
}

.hero-name {
    font: 700 48px/1.15 'Space Grotesk', sans-serif;
    color: var(--text);
    margin: 0 0 4px;
}

.hero-title {
    font: 700 28px/1.2 'Space Grotesk', sans-serif;
    color: var(--text-muted);
    margin: 0 0 26px;
}

.role-rotator {
    position: relative;
    overflow: hidden;
    height: 34px;
}

.role-rotator-item {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    width: 100%;
    opacity: 0;
    transform: translateY(100%);
    transition: transform 0.5s ease, opacity 0.5s ease;
}

.role-rotator-item.is-active {
    opacity: 1;
    transform: translateY(0);
}

.role-rotator-item.is-exiting {
    opacity: 0;
    transform: translateY(-100%);
}

.hero-desc {
    font: 400 16.5px/1.6 'Work Sans', sans-serif;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 26px 0;
}

.hero-avatar {
    width: 280px;
    height: 280px;
    flex-shrink: 0;
    border-radius: 20px;
    object-fit: cover;
}

.persona-heading {
    font: 600 20px 'Space Grotesk', sans-serif;
    color: var(--text);
    margin: 32px 0 16px;
}

.persona-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 64px;
}

.persona-card {
    text-align: left;
    border: 1px solid var(--border);
    background: var(--bg-raised);
    border-radius: 16px;
    padding: 22px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: border-color 0.15s;
    font-family: 'Work Sans', sans-serif;
}

.persona-card:hover {
    border-color: var(--text);
}

.persona-emoji {
    font-size: 28px;
}

.persona-label {
    font: 600 16px 'Space Grotesk', sans-serif;
    color: var(--text);
}

.persona-tagline {
    font: 400 13px 'Work Sans', sans-serif;
    color: var(--text-faint);
    line-height: 1.5;
}

.contact-block {
    text-align: center;
    margin: 32px 0;
}

.contact-heading {
    font: 600 22px 'Space Grotesk', sans-serif;
    margin: 0 0 16px;
}

.contact-block .social-row {
    margin-bottom: 0;
}

.social-row {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.social-icon {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    text-decoration: none;
    transition: border-color 0.15s, background 0.15s;
}

.social-icon:hover {
    border-color: var(--text);
    background: var(--bg-chip);
}

.social-icon svg {
    width: 18px;
    height: 18px;
}

.social-row-small .social-icon {
    width: 30px;
    height: 30px;
}

.social-row-small .social-icon svg {
    width: 14px;
    height: 14px;
}

.email-btn {
    display: inline-block;
    text-decoration: none;
    font: 500 14px 'Work Sans', sans-serif;
    color: var(--accent-text);
    background: var(--text);
    border-radius: 100px;
    padding: 13px 26px;
}

/* CONTENT SECTIONS */
.content-section {
    max-width: 70vw;
    margin: 0 auto;
    width: 100%;
    padding: 24px 0 96px;
}

.section-title {
    font: 600 30px 'Space Grotesk', sans-serif;
    margin: 0 0 6px;
}

.section-desc {
    font-size: 15.5px;
    color: var(--text-secondary);
    margin: 0 0 44px;
    max-width: 620px;
    line-height: 1.6;
}

.hero-cta-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin: 0 0 36px;
}

.cta-btn {
    display: inline-block;
    font: 500 13.5px 'Work Sans', sans-serif;
    color: var(--accent-text);
    background: var(--text);
    border: 1.5px solid var(--text);
    border-radius: 100px;
    padding: 10.5px 22px;
    text-decoration: none;
}

.cta-btn-outline {
    color: var(--text);
    background: none;
}

.subhead {
    font: 600 15px 'Work Sans', sans-serif;
    margin: 0 0 16px;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 44px;
}

.chip {
    background: var(--bg-chip);
    padding: 9px 16px;
    border-radius: 100px;
    font-size: 13.5px;
    color: var(--text);
}

.chip-btn {
    background: var(--bg-chip);
    padding: 9px 16px;
    border-radius: 100px;
    font-size: 13.5px;
    color: var(--text);
    cursor: pointer;
    border: 1px solid var(--border);
    font-family: 'Work Sans', sans-serif;
}

.chip-btn.active {
    border-color: var(--text);
}

/* ACCORDIONS */
.accordion-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 44px;
}

.accordion-item {
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
}

.accordion-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 18px;
    border: none;
    background: var(--accent-text);
    cursor: pointer;
    text-align: left;
    font-family: 'Work Sans', sans-serif;
}

.accordion-role {
    font-size: 14.5px;
    font-weight: 500;
    color: var(--text);
}

.accordion-org {
    font-size: 13.5px;
    color: var(--text-faint);
}

.accordion-org-link {
    text-decoration: none;
}

.accordion-org-link:hover {
    text-decoration: underline;
}

.accordion-meta {
    display: flex;
    align-items: center;
    gap: 14px;
}

.accordion-period {
    font-size: 13px;
    color: var(--text-muted);
}

.accordion-chevron {
    font-size: 15px;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    transition: transform 0.15s;
    transform: rotate(180deg);
}

.accordion-item.open .accordion-chevron {
    transform: rotate(0deg);
}

.accordion-body {
    padding: 16px 18px 18px;
    background: var(--bg-raised);
}

.accordion-body p {
    margin: 0;
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.6;
    white-space: pre-line;
}

/* PROJECTS */
.carousel {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

.project-list {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: calc((100% - 2 * 14px) / 3);
    gap: 14px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 4px;
}

.project-list::-webkit-scrollbar {
    display: none;
}

.carousel-track {
    scrollbar-width: none;
    flex: 1;
    min-width: 0;
}

.carousel-nav {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1.5px solid var(--border);
    background: var(--bg-raised);
    color: var(--text);
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-nav:hover {
    border-color: var(--text);
}

.carousel-nav:disabled {
    opacity: 0.35;
    cursor: default;
}

.carousel-single-page .carousel-nav {
    display: none;
}

.project-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: var(--bg-subtle);
    border-radius: 14px;
    padding: 20px;
    align-items: flex-start;
    scroll-snap-align: start;
}

.project-thumb {
    flex-shrink: 0;
    border-radius: 10px;
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.project-title {
    margin: 0 0 4px;
    font: 600 15.5px 'Work Sans', sans-serif;
}

.project-desc {
    margin: 0;
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* PUBLICATIONS */
.pub-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 44px;
}

.pub-card {
    background: var(--bg-subtle);
    border-radius: 16px;
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.pub-title {
    margin: 0 0 8px;
    font: 600 15.5px 'Work Sans', sans-serif;
}

.pub-summary {
    margin: 0;
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.55;
}

.pub-footer {
    margin-top: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-top: 8px;
    border-top: 1px solid var(--border-subtle);
}

.pub-venue {
    font-size: 12.5px;
    color: var(--text-faint);
}

.pub-date::before {
    content: " · ";
}

.pub-authors {
    margin: 0 0 8px;
    font-size: 13px;
    color: var(--text-muted);
}

.pub-authors:empty {
    display: none;
}

.pub-link {
    flex-shrink: 0;
    font: 500 13px 'Work Sans', sans-serif;
    color: var(--accent-text);
    background: var(--text);
    border-radius: 100px;
    padding: 9px 16px;
    text-decoration: none;
    white-space: nowrap;
}

/* RESEARCH PROJECTS */
.research-project-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 44px;
}

.research-project-card {
    background: var(--bg-subtle);
    border-radius: 14px;
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.research-project-title {
    margin: 0 0 4px;
    font: 600 14.5px 'Work Sans', sans-serif;
}

.research-project-desc {
    margin: 0;
    font-size: 13px;
    color: var(--text-secondary);
}

.research-project-date {
    font-size: 12.5px;
    font-weight: 500;
    color: var(--text-faint);
}

.research-project-date:empty {
    display: none;
}

.research-project-date::before {
    content: " · ";
}

.status-badge {
    flex-shrink: 0;
    font-size: 12px;
    color: var(--text-muted);
    background: var(--border-subtle);
    padding: 5px 12px;
    border-radius: 100px;
    white-space: nowrap;
}

/* TALKS */
.talk-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-bottom: 44px;
}

.talk-card {
    display: flex;
    gap: 18px;
    background: var(--bg-subtle);
    border-radius: 14px;
    padding: 16px;
    align-items: center;
}

.talk-thumb {
    width: 96px;
    height: 72px;
    border-radius: 10px;
    flex-shrink: 0;
    background: var(--bg-thumb);
}

.talk-title {
    margin: 0 0 4px;
    font: 600 15px 'Work Sans', sans-serif;
}

.talk-venue {
    margin: 0;
    font-size: 13px;
    color: var(--text-faint);
}

.talk-desc {
    margin: 8px 0 0;
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.6;
    white-space: pre-line;
}

.talk-list-big {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: calc((100% - 2 * 14px) / 3);
    gap: 14px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 4px;
    margin-bottom: 44px;
}

.talk-list-big::-webkit-scrollbar {
    display: none;
}

.talk-card-big {
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: var(--bg-subtle);
    border-radius: 14px;
    padding: 20px;
    scroll-snap-align: start;
}

.talk-thumb-big {
    width: 100%;
    aspect-ratio: 16 / 10;
    border-radius: 10px;
    background: var(--bg-thumb);
    object-fit: cover;
    display: block;
}

.talk-card-big .talk-title {
    font-size: 16.5px;
}

.talk-card-big .talk-venue {
    font-size: 13.5px;
}

.talk-date {
    margin: 2px 0 0;
    font-size: 13.5px;
    color: var(--text-faint);
}

.talk-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.talk-tag {
    padding: 5px 12px;
    font-size: 12px;
}

/* PROGRAMS LED */
.program-card {
    display: flex;
    flex-direction: column;
    gap: 14px;
    background: var(--bg-subtle);
    border-radius: 14px;
    padding: 16px;
    align-items: flex-start;
}

.program-row {
    display: flex;
    gap: 14px;
    width: 100%;
}

.program-thumb {
    width: 108px;
    height: 108px;
    border-radius: 10px;
    flex-shrink: 0;
    background: var(--bg-thumb);
    object-fit: cover;
    display: block;
}

.program-body {
    flex: 1;
    min-width: 0;
}

.program-title-link {
    color: inherit;
    text-decoration: none;
}

.program-title-link:hover {
    text-decoration: underline;
}

/* MEDIA GRID (blogs/videos) */
.label-row {
    margin-bottom: 8px;
    font: 500 13px 'Work Sans', sans-serif;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.media-grid {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 320px;
    gap: 14px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 4px;
    margin-bottom: 24px;
}

.media-grid::-webkit-scrollbar {
    display: none;
}

.media-card-big {
    background: var(--bg-subtle);
    border-radius: 14px;
    overflow: hidden;
    scroll-snap-align: start;
    aspect-ratio: 16 / 9;
    display: flex;
    flex-direction: column;
}

.media-thumb-big {
    width: 100%;
    flex: 1;
    min-height: 0;
    background: var(--bg-thumb);
    object-fit: cover;
    display: block;
}

.media-body {
    padding: 10px 12px;
    min-height: 0;
}

.media-title {
    margin: 0 0 3px;
    font: 600 13px 'Work Sans', sans-serif;
}

.media-desc {
    margin: 0;
    font-size: 11.5px;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* PERSONAL / INSTAGRAM */
.ig-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.ig-follow {
    font: 500 13.5px 'Work Sans', sans-serif;
    color: var(--text);
    text-decoration: none;
}

.ig-frame {
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 12px;
}

.ig-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.ig-photo {
    display: block;
    width: 100%;
    aspect-ratio: 1;
    border-radius: 14px;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    overflow: hidden;
}

.ig-photo-svg {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.ig-note {
    font-size: 12.5px;
    color: var(--text-muted);
    margin: 0;
}

/* FOOTER */
.site-footer {
    text-align: center;
    padding: 20px 48px;
    font-size: 12.5px;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.footer-label {
    font: 500 13px 'Work Sans', sans-serif;
    color: var(--text-secondary);
}

/* RESPONSIVE */
@media (max-width: 720px) {

    .topnav,
    .content-section,
    .hero {
        padding-left: 24px;
        padding-right: 24px;
    }

    .hero {
        padding-top: 32px;
        padding-bottom: 32px;
        justify-content: flex-start;
    }

    .hero-top {
        flex-direction: column;
        align-items: flex-start;
    }

    .hero-avatar {
        width: 200px;
        height: 200px;
    }

    .persona-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pub-grid,
    .talk-list {
        grid-template-columns: 1fr;
    }

    .project-list,
    .talk-list-big {
        grid-auto-columns: 100%;
    }

    .content-section,
    .hero-content {
        max-width: 100%;
    }

    .hero-name {
        font-size: 36px;
    }

    .hero-title {
        font-size: 22px;
    }
}