:root {
    --paper: #f4efe6;
    --paper-2: #ebe3d6;
    --ink: #151713;
    --muted: rgba(21, 23, 19, 0.64);
    --faint: rgba(21, 23, 19, 0.42);
    --line: rgba(21, 23, 19, 0.14);
    --line-strong: rgba(18, 116, 86, 0.36);
    --accent: #127456;
    --accent-2: #ddf565;
    --accent-soft: rgba(18, 116, 86, 0.1);
    --white: rgba(255, 255, 255, 0.72);
    --shadow: 0 24px 90px rgba(50, 43, 32, 0.13);
    --font-sans: "Sora", "Segoe UI", sans-serif;
    --font-mono: "IBM Plex Mono", monospace;
    --max: 1180px;
    --pad: clamp(20px, 5vw, 64px);
    --radius: 28px;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-width: 320px;
    color: var(--ink);
    background:
        radial-gradient(circle at 18% 12%, rgba(221, 245, 101, 0.34), transparent 28%),
        radial-gradient(circle at 82% 4%, rgba(18, 116, 86, 0.18), transparent 25%),
        linear-gradient(180deg, var(--paper) 0%, #f8f4ed 46%, #e8dfd2 100%);
    font-family: var(--font-sans);
    line-height: 1.55;
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 30;
    pointer-events: none;
    opacity: 0.22;
    background-image:
        linear-gradient(rgba(21, 23, 19, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(21, 23, 19, 0.035) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: linear-gradient(180deg, black, transparent 78%);
}

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

button:focus-visible,
a:focus-visible {
    outline: 3px solid rgba(18, 116, 86, 0.55);
    outline-offset: 4px;
}

img,
canvas {
    max-width: 100%;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

.skip-link {
    position: fixed;
    top: 14px;
    left: 14px;
    z-index: 100;
    padding: 12px 16px;
    color: var(--paper);
    background: var(--ink);
    border-radius: 999px;
    transform: translateY(-180%);
    transition: transform 180ms ease;
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    position: fixed;
    top: 18px;
    left: 50%;
    z-index: 60;
    width: min(calc(100% - 28px), 1120px);
    min-height: 66px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 10px 10px 10px 16px;
    border: 1px solid rgba(21, 23, 19, 0.12);
    border-radius: 999px;
    background: rgba(244, 239, 230, 0.74);
    box-shadow: 0 12px 44px rgba(50, 43, 32, 0.1);
    backdrop-filter: blur(22px) saturate(140%);
    transform: translateX(-50%);
    transition: background 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.site-header.is-scrolled {
    background: rgba(244, 239, 230, 0.92);
    border-color: rgba(18, 116, 86, 0.24);
    box-shadow: 0 18px 60px rgba(50, 43, 32, 0.14);
}

.brand {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.brand-mark {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    color: var(--paper);
    font-family: var(--font-mono);
    font-weight: 700;
    border-radius: 50%;
    background: var(--ink);
}

.brand-copy {
    display: grid;
    line-height: 1.1;
}

.brand-copy strong {
    font-size: 14px;
}

.brand-copy small,
.eyebrow,
.status-label,
.project-meta,
.publication-meta,
.timeline-item > span,
.site-footer {
    font-family: var(--font-mono);
}

.brand-copy small {
    margin-top: 4px;
    color: var(--muted);
    font-size: 11px;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 3px;
}

.site-nav a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    padding: 0 14px;
    color: var(--muted);
    font-size: 14px;
    border-radius: 999px;
    transition: color 180ms ease, background 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
    color: var(--ink);
    background: rgba(21, 23, 19, 0.07);
}

.site-nav .nav-cta {
    color: var(--paper);
    background: var(--accent);
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 50%;
    color: var(--ink);
    background: rgba(21, 23, 19, 0.08);
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    margin: 4px auto;
    background: currentColor;
}

.hero-section {
    position: relative;
    min-height: 100svh;
    display: grid;
    align-items: center;
    padding: 132px var(--pad) 46px;
    overflow: hidden;
    isolation: isolate;
}

.hero-field,
.hero-grid {
    position: absolute;
    inset: 0;
    z-index: -2;
}

.hero-field {
    width: 100%;
    height: 100%;
    opacity: 0.7;
}

.hero-grid {
    z-index: -1;
    background:
        radial-gradient(circle at 70% 40%, rgba(255, 255, 255, 0.86), transparent 27%),
        linear-gradient(115deg, transparent 0 62%, rgba(18, 116, 86, 0.09) 62% 100%);
}

.hero-shell {
    width: min(100%, var(--max));
    display: grid;
    grid-template-columns: minmax(0, 1.12fr) minmax(300px, 0.88fr);
    gap: clamp(34px, 7vw, 92px);
    align-items: center;
    margin: 0 auto;
}

.eyebrow {
    margin: 0 0 18px;
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    max-width: 860px;
    margin-bottom: 28px;
    font-size: clamp(4.15rem, 8.9vw, 9rem);
    line-height: 0.9;
    letter-spacing: -0.08em;
}

h2 {
    max-width: 980px;
    margin-bottom: 20px;
    font-size: clamp(2.3rem, 5.5vw, 6.4rem);
    line-height: 0.94;
    letter-spacing: -0.07em;
}

h3 {
    margin-bottom: 10px;
    font-size: clamp(1.2rem, 2.1vw, 2rem);
    line-height: 1.08;
    letter-spacing: -0.045em;
}

.hero-lede,
.section-heading p,
.profile-note,
.profile-link p,
.contact-panel p {
    max-width: 740px;
    color: var(--muted);
    font-size: clamp(1rem, 1.5vw, 1.18rem);
}

.hero-actions,
.contact-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 34px;
}

.button {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 18px;
    border: 1px solid var(--line);
    border-radius: 999px;
    font-weight: 700;
    transition: transform 220ms var(--ease), background 180ms ease, border-color 180ms ease;
}

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

.button.primary {
    color: var(--paper);
    background: var(--ink);
    border-color: var(--ink);
}

.button.secondary {
    background: rgba(255, 255, 255, 0.54);
}

.portrait-stage {
    position: relative;
    margin: 0;
    min-height: min(72vw, 660px);
    display: grid;
    place-items: center;
}

.portrait-stage::before,
.portrait-stage::after {
    content: "";
    position: absolute;
    border-radius: 50%;
}

.portrait-stage::before {
    width: min(92%, 560px);
    aspect-ratio: 1;
    border: 1px solid rgba(21, 23, 19, 0.14);
    background:
        radial-gradient(circle at 34% 30%, rgba(221, 245, 101, 0.56), transparent 22%),
        radial-gradient(circle at 65% 70%, rgba(18, 116, 86, 0.2), transparent 28%),
        rgba(255, 255, 255, 0.38);
    box-shadow: var(--shadow);
}

.portrait-stage::after {
    width: min(68%, 420px);
    aspect-ratio: 1;
    border: 1px dashed rgba(18, 116, 86, 0.34);
    animation: orbitSpin 26s linear infinite;
}

.portrait-stage img {
    position: relative;
    z-index: 1;
    width: min(72%, 430px);
    height: auto;
    object-fit: contain;
    border-radius: 34px;
    box-shadow: 0 26px 100px rgba(50, 43, 32, 0.24);
}

.portrait-stage figcaption {
    position: absolute;
    right: 4%;
    bottom: 9%;
    z-index: 2;
    max-width: 250px;
    padding: 16px;
    border: 1px solid rgba(21, 23, 19, 0.12);
    border-radius: 22px;
    background: rgba(244, 239, 230, 0.82);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.portrait-stage figcaption span,
.portrait-stage figcaption strong {
    display: block;
}

.portrait-stage figcaption span {
    margin-bottom: 6px;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 12px;
}

.signal-strip {
    width: min(100%, var(--max));
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    margin: 52px auto 0;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--line);
}

.signal-strip div {
    padding: 18px;
    background: rgba(255, 255, 255, 0.5);
}

.signal-strip span,
.signal-strip strong {
    display: block;
}

.signal-strip span {
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 12px;
}

.signal-strip strong {
    margin-top: 8px;
    font-size: clamp(1rem, 1.7vw, 1.35rem);
    letter-spacing: -0.045em;
}

.section {
    padding: clamp(74px, 10vw, 142px) var(--pad);
    scroll-margin-top: 112px;
}

.section > * {
    width: min(100%, var(--max));
    margin-inline: auto;
}

.section-heading {
    margin-bottom: 42px;
}

.profile-layout,
.research-grid,
.github-dashboard,
.publication-panel,
.contact-panel {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.44);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
}

.profile-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.82fr);
    gap: 1px;
    overflow: hidden;
    background: var(--line);
}

.profile-note,
.profile-facts {
    margin: 0;
    padding: clamp(24px, 4vw, 44px);
    background: rgba(255, 255, 255, 0.54);
}

.profile-note p:last-child {
    margin-bottom: 0;
}

.profile-facts {
    display: grid;
    gap: 1px;
    background: var(--line);
}

.profile-facts div {
    padding: 18px;
    background: rgba(244, 239, 230, 0.82);
}

.profile-facts dt {
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 12px;
    text-transform: uppercase;
}

.profile-facts dd {
    margin: 7px 0 0;
    font-weight: 700;
}

.profile-facts a,
.section-heading a,
.panel-heading a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 4px;
}

.github-dashboard {
    overflow: hidden;
}

.github-status {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--line);
}

.github-status div {
    padding: 20px;
    background: rgba(255, 255, 255, 0.52);
}

.status-label {
    display: block;
    margin-bottom: 8px;
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
}

.github-status strong {
    display: block;
    font-size: clamp(1.05rem, 1.7vw, 1.4rem);
    letter-spacing: -0.04em;
}

.project-list,
.publication-list {
    display: grid;
    gap: 1px;
    background: var(--line);
}

.project-row,
.publication-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 24px;
    padding: clamp(20px, 3vw, 30px);
    background: rgba(244, 239, 230, 0.86);
    transition: background 180ms ease, transform 240ms var(--ease);
}

.project-row:hover,
.publication-row:hover {
    background: rgba(255, 255, 255, 0.78);
    transform: translateY(-2px);
}

.project-row h3,
.publication-row h3 {
    max-width: 760px;
    margin: 0 0 10px;
}

.project-row p,
.publication-row p {
    max-width: 840px;
    margin: 0;
    color: var(--muted);
}

.project-meta,
.publication-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 18px;
    color: var(--faint);
    font-size: 12px;
}

.project-meta span,
.publication-meta span,
.topic-pill {
    min-height: 30px;
    display: inline-flex;
    align-items: center;
    padding: 0 10px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.44);
}

.project-arrow,
.publication-arrow {
    align-self: start;
    min-width: 46px;
    height: 46px;
    display: grid;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: 50%;
    color: var(--paper);
    background: var(--ink);
    font-family: var(--font-mono);
    transition: transform 220ms var(--ease), background 180ms ease;
}

.project-row:hover .project-arrow,
.publication-row:hover .publication-arrow {
    transform: translate(2px, -2px);
    background: var(--accent);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    margin-bottom: 22px;
    overflow: hidden;
    background: var(--line);
}

.profile-link {
    min-height: 290px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: clamp(24px, 4vw, 44px);
    background:
        radial-gradient(circle at 86% 18%, var(--accent-soft), transparent 30%),
        rgba(255, 255, 255, 0.56);
    transition: background 180ms ease, transform 240ms var(--ease);
}

.profile-link:hover,
.profile-link:focus-visible {
    background:
        radial-gradient(circle at 86% 18%, rgba(221, 245, 101, 0.32), transparent 30%),
        rgba(255, 255, 255, 0.78);
    transform: translateY(-3px);
}

.profile-link span {
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.profile-link strong {
    display: block;
    margin: 26px 0 14px;
    font-size: clamp(1.7rem, 3.7vw, 4rem);
    line-height: 0.96;
    letter-spacing: -0.07em;
}

.publication-panel {
    overflow: hidden;
}

.panel-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 18px;
    padding: 24px clamp(20px, 3vw, 30px);
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.54);
}

.panel-heading h3 {
    margin: 0;
}

.panel-heading > span {
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 12px;
}

.timeline {
    position: relative;
    display: grid;
    gap: 12px;
}

.timeline::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 92px;
    width: 1px;
    background: linear-gradient(180deg, transparent, var(--accent), transparent);
}

.timeline-item {
    display: grid;
    grid-template-columns: 126px minmax(0, 1fr);
    gap: 24px;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.44);
    backdrop-filter: blur(12px);
    transition: transform 240ms var(--ease), border-color 180ms ease, background 180ms ease;
}

.timeline-item:hover {
    transform: translateX(8px);
    border-color: var(--line-strong);
    background: rgba(255, 255, 255, 0.62);
}

.timeline-item > span {
    color: var(--accent);
    font-weight: 700;
}

.timeline-item p {
    margin-bottom: 0;
    color: var(--muted);
}

.contact-panel {
    padding: clamp(28px, 6vw, 72px);
    background:
        radial-gradient(circle at 85% 20%, rgba(221, 245, 101, 0.42), transparent 30%),
        rgba(255, 255, 255, 0.52);
}

.site-footer {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 28px var(--pad) 62px;
    color: var(--muted);
    font-size: 12px;
}

.skeleton-line {
    min-height: 96px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.34), rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.34));
    animation: skeletonPulse 1.3s ease-in-out infinite;
}

.empty-state,
.error-state {
    padding: 24px;
    background: rgba(244, 239, 230, 0.86);
    color: var(--muted);
}

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 720ms var(--ease), transform 720ms var(--ease);
}

.reveal.in-view {
    opacity: 1;
    transform: translateY(0);
}

@keyframes skeletonPulse {
    0%, 100% { opacity: 0.55; }
    50% { opacity: 1; }
}

@keyframes orbitSpin {
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 1040px) {
    .hero-shell,
    .profile-layout {
        grid-template-columns: 1fr;
    }

    .portrait-stage {
        min-height: 540px;
    }

    .github-status,
    .signal-strip {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 760px) {
    .site-header {
        top: 12px;
        width: calc(100% - 24px);
        border-radius: 24px;
    }

    .brand-copy {
        display: none;
    }

    .nav-toggle {
        display: block;
    }

    .site-nav {
        position: absolute;
        top: calc(100% + 10px);
        left: 0;
        right: 0;
        display: none;
        grid-template-columns: 1fr;
        padding: 10px;
        border: 1px solid var(--line);
        border-radius: 20px;
        background: rgba(244, 239, 230, 0.96);
        box-shadow: var(--shadow);
    }

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

    .site-nav a {
        justify-content: center;
    }

    .hero-section {
        min-height: auto;
        padding-top: 108px;
    }

    h1 {
        font-size: clamp(3.5rem, 16vw, 5.4rem);
    }

    h2 {
        font-size: clamp(2.2rem, 11vw, 3.6rem);
    }

    .hero-actions,
    .contact-actions {
        display: grid;
    }

    .portrait-stage {
        min-height: 430px;
    }

    .portrait-stage figcaption {
        right: 0;
        bottom: 2%;
    }

    .signal-strip,
    .github-status,
    .research-grid {
        grid-template-columns: 1fr;
    }

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

    .project-arrow,
    .publication-arrow {
        justify-self: start;
    }

    .panel-heading {
        display: grid;
    }

    .timeline::before {
        left: 23px;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        padding-left: 38px;
    }

    .timeline-item:hover {
        transform: none;
    }

    .site-footer {
        display: grid;
        padding-bottom: 42px;
    }
}

@media (max-width: 430px) {
    :root {
        --pad: 16px;
    }

    .site-header {
        min-height: 60px;
    }

    .brand-mark {
        width: 40px;
        height: 40px;
    }

    .portrait-stage {
        min-height: 360px;
    }

    .portrait-stage figcaption {
        max-width: 215px;
    }
}

@media (max-width: 900px) and (orientation: landscape) {
    .hero-section {
        min-height: auto;
        padding-top: 96px;
        padding-bottom: 34px;
    }

    .portrait-stage,
    .signal-strip {
        display: none;
    }
}

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

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}