:root {
    --bg: #f6efe6;
    --bg-secondary: #f6efe6;
    --surface: rgba(255, 251, 244, 0.96);
    --surface-strong: rgba(255, 255, 255, 0.98);
    --surface-border: rgba(50, 27, 11, 0.08);
    --ink: #17110e;
    --ink-soft: #4e4036;
    --muted: #7f6e63;
    --accent: #5569ea;
    --accent-strong: #3f51bf;
    --accent-alt: #94a2ff;
    --accent-glow: rgba(85, 105, 234, 0.18);
    --gold: #d5ab56;
    --shadow: 0 28px 70px rgba(53, 28, 11, 0.14);
    --spotlight: rgba(0, 0, 0, 0.25);
    --nav-active-bg: rgba(255, 255, 255, 0.08);
    --title-ink: #5569ea;
    --container: min(1180px, calc(100vw - 48px));
    --radius-xl: 30px;
    --radius-lg: 24px;
    --radius-md: 18px;
    --radius-pill: 999px;
    --body-font: "IBM Plex Sans", sans-serif;
    --display-font: "Cormorant Garamond", serif;
    --accent-font: "IBM Plex Sans", sans-serif;
    --mono-font: "Fira Mono", monospace;
}

body[data-theme="dark"] {
    --bg: #141414;
    --bg-secondary: #141414;
    --surface: rgba(24, 24, 24, 0.96);
    --surface-strong: rgba(30, 30, 30, 0.98);
    --surface-border: rgba(255, 255, 255, 0.08);
    --ink: #f5efe8;
    --ink-soft: #d8cfc4;
    --muted: #b0a69a;
    --accent: #7a88ff;
    --accent-strong: #5569ea;
    --accent-alt: #aab5ff;
    --accent-glow: rgba(122, 136, 255, 0.18);
    --gold: #efcd7d;
    --shadow: 0 28px 80px rgba(0, 0, 0, 0.35);
    --spotlight: rgba(255, 255, 255, 0.35);
    --nav-active-bg: rgba(255, 255, 255, 0.08);
    --title-ink: #aab5ff;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: var(--body-font);
    background: var(--bg);
    transition: background-color 220ms ease, color 220ms ease;
}

body::before {
    content: none;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
}

button,
input,
textarea,
select {
    font: inherit;
}

.site-header,
.site-footer,
.content-section,
.landing-hero,
.page-hero,
.article-hero,
.article-layout {
    width: var(--container);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 18px;
    z-index: 30;
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 18px;
    align-items: center;
    margin-top: 18px;
    padding: 16px 18px;
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-pill);
    background: var(--surface);
    backdrop-filter: blur(18px);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.08);
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: max-content;
}

.brand-mark__monogram {
    display: inline-grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-family: var(--accent-font);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
}

.brand-mark__label {
    font-family: var(--accent-font);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.site-nav {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.site-nav a {
    padding: 10px 14px;
    border-radius: var(--radius-pill);
    color: var(--title-ink);
    transition: transform 160ms ease, background-color 160ms ease, color 160ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    transform: translateY(-1px);
    background: var(--nav-active-bg);
    color: var(--ink);
}

.nav-pill {
    background: linear-gradient(145deg, var(--accent), var(--accent-strong));
    color: #fff4ef !important;
}

.header-actions {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.theme-toggle,
.nav-toggle {
    border: 1px solid var(--surface-border);
    background: var(--surface-strong);
    color: var(--ink-soft);
}

.theme-toggle,
.nav-toggle {
    display: inline-grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 160ms ease, background-color 160ms ease;
}

.theme-toggle:hover,
.nav-toggle:hover {
    transform: translateY(-1px);
}

.theme-toggle__sun,
.theme-toggle__moon {
    position: absolute;
    transition: opacity 180ms ease, transform 180ms ease;
}

.theme-toggle {
    position: relative;
}

.theme-toggle__sun {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid currentColor;
    box-shadow:
        0 -12px 0 -9px currentColor,
        0 12px 0 -9px currentColor,
        12px 0 0 -9px currentColor,
        -12px 0 0 -9px currentColor;
}

.theme-toggle__moon {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    box-shadow: 6px -2px 0 0 currentColor;
}

body[data-theme="dark"] .theme-toggle__sun {
    opacity: 0;
    transform: scale(0.7) rotate(-30deg);
}

body[data-theme="dark"] .theme-toggle__moon {
    opacity: 1;
    transform: scale(1);
}

body[data-theme="light"] .theme-toggle__sun {
    opacity: 1;
    transform: scale(1);
}

body[data-theme="light"] .theme-toggle__moon {
    opacity: 0;
    transform: scale(0.7) rotate(30deg);
}

.nav-toggle {
    display: none;
    justify-self: end;
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    margin: 3px auto;
    background: currentColor;
}

.landing-hero,
.page-hero,
.article-hero {
    padding-top: 84px;
}

.page-hero,
.article-hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.landing-hero {
    display: block;
    max-width: 860px;
    min-height: auto;
}

.landing-hero__copy h1 {
    text-wrap: balance;
}

.eyebrow,
.portal-card__eyebrow,
.achievement-card__type,
.feature-card__kicker,
.highlight-card__meta,
.essay-card__meta,
.publication-card__meta,
.publication-card__authors,
.project-card__meta,
.contact-label,
.timeline-item__year,
.note-panel__label {
    font-family: var(--accent-font);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--title-ink);
}

.eyebrow {
    margin: 0 0 14px;
    font-size: 1.5rem;
}

h1,
h2,
h3 {
    margin: 0;
    line-height: 0.94;
    font-family: var(--display-font);
    font-weight: 600;
    font-variant-numeric: lining-nums;
}

h1 {
    font-size: clamp(2rem, 4.2vw, 3.9rem);
}

.article-hero h1 {
    font-size: clamp(1.8rem, 3.4vw, 3.1rem);
}

h2 {
    font-size: clamp(1.3rem, 2.4vw, 2.3rem);
}

h3 {
    font-size: clamp(1.25rem, 2.3vw, 2.2rem);
}

p {
    color: var(--ink);
    line-height: 1.75;
}

.hero-lede,
.page-hero__lede,
.article-intro,
.section-copy {
    max-width: 62ch;
    margin-top: 20px;
    font-size: 1.05rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 28px;
}

.about-tags span,
.filter-chip {
    padding: 10px 14px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--surface-border);
    background: rgba(255, 255, 255, 0.08);
    color: var(--ink-soft);
    font-family: var(--accent-font);
    font-weight: 500;
    font-size: 0.84rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 20px;
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
    font-family: var(--accent-font);
    font-size: 0.94rem;
}

.button:hover {
    transform: translateY(-2px);
}

.button--primary {
    background: var(--accent);
    color: #fff5ef;
}

.button--secondary {
    background: var(--surface-strong);
    border-color: var(--surface-border);
}

.portal-card,
.mini-stat-card,
.achievement-card,
.publication-card,
.project-card,
.question-card,
.essay-card,
.article-card,
.note-panel,
.timeline-item,
.portrait-shell,
.split-panel {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.content-section,
.subpage-main,
.article-main {
    padding-bottom: 72px;
}

.content-section {
    margin-top: 42px;
}

.section-heading {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 28px;
}

.portal-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.portal-grid--contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

/* Portal cards are the clickable boxes that replace the cluttered one-page layout. */
.portal-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-height: 250px;
    padding: 26px;
    overflow: hidden;
}

.portal-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at var(--x, 50%) var(--y, 40%), var(--spotlight), transparent 36%);
    opacity: 0;
    transition: opacity 180ms ease;
}

.portal-card:hover::before {
    opacity: 1;
}

.portal-card h3 {
    max-width: none;
}

.split-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
    gap: 18px;
    padding: 24px;
}

.mini-stat-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    align-content: center;
    justify-items: stretch;
    height: 100%;
}

.hobby-block {
    display: flex;
    flex-direction: column;
    gap: 28px;
    justify-content: flex-start;
}

.hobby-block h2 {
    font-size: 1.8rem;
    font-family: var(--display-font);
    color: var(--ink);
    border-bottom: 2px solid var(--surface-border);
    padding-bottom: 16px;
    margin-bottom: 4px;
    margin-top: 0;
    text-align: center;
}

.hobby-entry {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.hobby-entry h3 {
    margin: 0;
    font-size: 1.3rem;
    color: var(--ink);
}

.hobby-entry p {
    margin: 0;
    color: var(--ink-soft);
}

.mini-stat-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    text-align: left;
    gap: 10px;
    padding: 28px 24px;
    width: 100%;
    min-height: 100%;
}

.mini-stat-card__eyebrow {
    font-family: var(--accent-font);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}

.mini-stat-card__value {
    font-family: var(--accent-font);
    font-size: clamp(1.8rem, 2.6vw, 2.2rem);
    font-weight: 700;
    line-height: 1;
    color: var(--ink);
}

.mini-stat-card__label {
    font-family: var(--accent-font);
    font-weight: 600;
    color: var(--muted);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.landing-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 340px);
    gap: 40px;
    align-items: center;
}

.about-grid {
    display: grid;
    grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
    gap: 34px;
    align-items: start;
}

.portrait-shell {
    padding: 14px;
}

.portrait-image {
    border-radius: 22px;
    object-fit: cover;
}

.about-copy {
    display: grid;
    gap: 16px;
}

.about-copy--expanded {
    gap: 18px;
}

.about-copy__lead {
    font-size: 1.1rem;
}

.inline-link {
    color: var(--title-ink);
    font-weight: 600;
}

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

.achievement-grid,
.card-grid,
.question-grid {
    display: grid;
    gap: 18px;
}

.achievement-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid--two,
.question-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.achievement-card,
.publication-card,
.project-card,
.question-card,
.essay-card,
.note-panel,
.timeline-item,
.article-card {
    padding: 24px;
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
}

.filter-chip {
    cursor: pointer;
    transition: transform 160ms ease, background-color 160ms ease;
}

.filter-chip.is-active,
.filter-chip:hover {
    transform: translateY(-1px);
    background: linear-gradient(145deg, var(--accent), var(--accent-strong));
    color: #fff8f2;
}

.achievement-card.is-hidden {
    display: none;
}

.page-hero--compact .page-hero__lede {
    margin-top: 0;
}

.question-card h3,
.essay-card h2,
.publication-card h2,
.project-card h3 {
    margin-bottom: 12px;
}

.text-link {
    color: var(--accent-strong);
    font-weight: 600;
}

.article-layout {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 24px;
    padding-bottom: 84px;
}

.article-sidebar {
    position: sticky;
    top: 124px;
    align-self: start;
}

.article-block+.article-block {
    margin-top: 26px;
    padding-top: 26px;
    border-top: 1px solid var(--surface-border);
}

.article-block--accent {
    padding: 0;
    border-radius: 0;
    background: transparent;
}

.back-link {
    display: inline-flex;
    margin-bottom: 22px;
    color: var(--accent-strong);
    font-size: 2rem;
    align-self: flex-end;
}

.timeline {
    display: grid;
    gap: 18px;
}

.timeline-item {
    position: relative;
    padding-left: 66px;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: 28px;
    top: 30px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: linear-gradient(145deg, var(--accent), var(--accent-alt));
    box-shadow: 0 0 0 8px var(--accent-glow);
}

.timeline-item::after {
    content: "";
    position: absolute;
    left: 35px;
    top: 54px;
    bottom: -18px;
    width: 2px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.18), transparent);
}

.timeline-item:last-child::after {
    display: none;
}

.site-footer {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px 18px;
    padding: 0 0 38px;
    color: var(--muted);
}

body.nav-open {
    overflow: hidden;
}

@media (max-width: 1080px) {
    .site-header {
        grid-template-columns: auto auto;
        justify-content: space-between;
    }

    .site-nav {
        grid-column: 1 / -1;
        justify-content: flex-start;
    }

    .landing-hero,
    .landing-grid,
    .about-grid,
    .portal-grid,
    .split-panel,
    .achievement-grid,
    .card-grid--two,
    .question-grid,
    .article-layout,
    .portal-grid--contact {
        grid-template-columns: 1fr;
    }

    .mini-stat-grid {
        justify-items: stretch;
    }

    .article-sidebar {
        position: static;
    }
}

@media (max-width: 760px) {
    :root {
        --container: min(100vw - 28px, 1000px);
    }

    .site-header {
        grid-template-columns: 1fr auto auto;
        padding: 14px;
        border-radius: 28px;
    }

    .brand-mark__label {
        display: none;
    }

    .nav-toggle {
        display: inline-grid;
    }

    .site-nav {
        display: none;
        width: 100%;
        padding-top: 8px;
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        max-height: calc(100vh - 130px);
        overflow-y: auto;
    }

    .site-nav.is-open {
        display: flex;
    }

    .site-nav a {
        padding: 14px 16px;
        background: rgba(255, 255, 255, 0.06);
    }

    .landing-hero,
    .page-hero,
    .article-hero {
        padding-top: 44px;
    }

    .portal-card,
    .mini-stat-card,
    .achievement-card,
    .publication-card,
    .project-card,
    .question-card,
    .essay-card,
    .article-card,
    .note-panel,
    .timeline-item,
    .portrait-shell,
    .split-panel {
        border-radius: 22px;
    }

    .portal-card {
        min-height: 220px;
    }

    h1 {
        font-size: clamp(2.8rem, 13vw, 4.6rem);
    }

    .hero-actions {
        gap: 10px;
    }

    .mini-stat-grid {
        justify-items: stretch;
    }

    .about-grid {
        gap: 22px;
    }

    .site-footer {
        padding-bottom: 24px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .portal-card,
    .project-card,
    .achievement-card,
    .publication-card,
    .mini-stat-card,
    .button,
    .theme-toggle,
    .nav-toggle {
        animation: none !important;
        transition: none !important;
        transform: none !important;
    }
}