:root {
    --bg: #f4f6f8;
    --surface: #ffffff;
    --surface-muted: #edf1f4;
    --text: #13212b;
    --text-muted: #516170;
    --line: #d4dde4;
    --accent: #0d7a9a;
    --accent-strong: #095b73;
    --caution: #d99a3b;
    --caution-strong: #8a5a12;
    --shadow: 0 16px 40px rgba(6, 35, 49, 0.11);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Manrope', sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 12% 12%, rgba(13, 122, 154, 0.12), transparent 42%),
        radial-gradient(circle at 92% 4%, rgba(255, 154, 73, 0.14), transparent 37%),
        var(--bg);
    line-height: 1.6;
    transition: background 0.25s, color 0.25s;
}

h1,
h2,
h3,
.brand,
nav a,
.button {
    font-family: 'Space Grotesk', sans-serif;
}

img {
    max-width: 100%;
}

.site-wrap {
    width: min(1080px, 100% - 2.6rem);
    margin: 0 auto;
    padding: 1.4rem 0 2.8rem;
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.8rem;
}

.brand {
    color: var(--text);
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
}

nav a:hover {
    color: var(--accent);
}

a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 3px;
}

.dark-toggle {
    border: 1px solid var(--line);
    background: var(--surface);
    border-radius: 999px;
    width: 42px;
    height: 42px;
    cursor: pointer;
    font-size: 1rem;
}

.card,
.panel,
.timeline-item,
.accomplishment-card,
.content-section {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

.hero {
    text-align: center;
    padding: 2.4rem 1.4rem;
}

.avatar {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #fff;
    box-shadow: 0 8px 18px rgba(4, 20, 29, 0.2);
}

.eyebrow {
    margin: 1rem 0 0.2rem;
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

h1 {
    margin: 0.2rem auto 0.8rem;
    font-size: clamp(1.7rem, 3.5vw, 2.6rem);
    line-height: 1.2;
    max-width: 18ch;
}

.lead {
    max-width: 66ch;
    margin: 0 auto;
    color: var(--text-muted);
}

.hero-actions {
    margin-top: 1.4rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.8rem;
}

.icons {
    margin-top: 1.1rem;
}

.icons a {
    display: inline-block;
    color: var(--text-muted);
    margin: 0 0.35rem;
    font-size: 1.35rem;
}

.icons a:hover {
    color: var(--accent);
}

.hero-proof {
    margin-top: 1.4rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.7rem;
}

.hero-proof span {
    background: var(--surface-muted);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 0.45rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-muted);
}

.button {
    display: inline-block;
    padding: 0.68rem 1.15rem;
    border-radius: 10px;
    border: 1px solid transparent;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.92rem;
}

.button.cta {
    background: var(--accent);
    color: #fff;
}

.button.cta:hover {
    background: var(--accent-strong);
}

.button.ghost {
    background: transparent;
    color: var(--text);
    border-color: var(--line);
}

.button.small {
    padding: 0.55rem 0.9rem;
    font-size: 0.85rem;
}

main {
    display: grid;
    gap: 1.3rem;
}

.content-section {
    padding: 1.6rem;
}

.content-section h2 {
    margin-top: 0;
    margin-bottom: 0.8rem;
    font-size: 1.5rem;
}

.section-intro {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 1.4rem;
    font-size: 1.05rem;
}

.engagement-section {
    background: var(--surface-muted);
}

.engagement-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.engagement-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 1.4rem;
}

.engagement-card h3 {
    margin: 0 0 0.4rem;
    font-size: 1.1rem;
    color: var(--text);
}

.engagement-card > p:first-of-type {
    margin: 0.4rem 0 1rem;
    color: var(--accent);
    font-weight: 700;
    font-size: 0.95rem;
}

.engagement-card p {
    margin: 0 0 0.8rem;
    color: var(--text-muted);
}

.engagement-list {
    list-style: none;
    padding: 0;
    margin: 0.8rem 0 1.2rem;
}

.engagement-list li {
    padding: 0.4rem 0;
    margin: 0;
    padding-left: 1.6rem;
    position: relative;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.engagement-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

.faq-section {
    background: transparent;
}

.faq-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.faq-item {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 1.2rem;
    cursor: pointer;
}

.faq-item summary {
    font-weight: 600;
    color: var(--text);
    user-select: none;
    font-size: 0.98rem;
}

.faq-item summary:hover {
    color: var(--accent);
}

.faq-item[open] {
    background: var(--surface-muted);
}

.faq-item p {
    margin: 1rem 0 0;
    color: var(--text-muted);
    line-height: 1.6;
    font-size: 0.95rem;
}

.grid.two-col {
    display: grid;
    gap: 0.9rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.value-grid,
.faq-list,
.detail-stack {
    display: grid;
    gap: 0.9rem;
}

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

.panel {
    padding: 1rem;
}

.panel h3 {
    margin-top: 0;
    margin-bottom: 0.4rem;
    font-size: 1.07rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.panel h3 i {
    font-size: 1.3rem;
    color: var(--accent);
    min-width: 1.5rem;
}

.panel p {
    margin: 0;
    color: var(--text-muted);
}

.impact-note {
    margin-top: 0.6rem !important;
    font-size: 0.9rem;
    padding-top: 0.6rem;
    border-top: 1px solid var(--line);
    color: var(--text) !important;
    font-weight: 500;
}

.impact-list,
.accomplishment-list {
    padding-left: 1.1rem;
    margin: 0;
}

.impact-list li,
.accomplishment-list li {
    margin-bottom: 0.75rem;
}

.inline-links {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
}

.inline-links a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 700;
}

.timeline {
    display: grid;
    gap: 0.8rem;
}

.timeline-item {
    padding: 0.95rem;
}

.timeline-item h3 {
    margin: 0 0 0.3rem;
    font-size: 1.04rem;
}

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

.logo-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.9rem;
    margin-bottom: 1rem;
}

.logo-row img {
    height: 42px;
    width: auto;
    object-fit: contain;
    filter: grayscale(0.2);
}

.contact {
    text-align: center;
}

.contact p {
    max-width: 62ch;
    margin: 0 auto 1rem;
    color: var(--text-muted);
}

.contact-alt {
    margin-top: 1rem;
    font-size: 0.95rem;
}

.contact-alt a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

.contact-alt a:hover {
    text-decoration: underline;
}

.accomplishment-card {
    width: min(900px, 100%);
    margin: 0 auto;
    padding: 1.8rem;
}

.accomplishment-card > p:first-of-type,
.accomplishment-card > h1 + p {
    color: var(--text-muted);
}

.article-meta {
    display: grid;
    gap: 0.35rem;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    margin: 1rem 0 1.5rem;
    padding: 0.9rem;
    background: var(--surface-muted);
    border: 1px solid var(--line);
    border-radius: 12px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.article-meta span {
    display: block;
}

.article-meta strong {
    color: var(--text);
}

.article-kicker {
    margin: 0.8rem 0 1.4rem;
    padding-left: 1rem;
    border-left: 3px solid var(--accent);
    color: var(--text);
    font-size: 1.08rem;
    font-style: italic;
}

/* Reusable header for Autonomous DataOps research pages and future series articles. */
.research-series-header {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--surface-muted);
    border: 1px solid var(--line);
    border-left: 4px solid var(--accent);
    border-radius: 12px;
}

.research-series-header p {
    margin: 0;
}

.research-series-header .series-name {
    color: var(--accent);
    font-weight: 700;
}

.research-series-header .series-topic {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
}

.research-series-header a {
    color: var(--accent);
    font-weight: 700;
    text-decoration: none;
}

.research-hero {
    text-align: center;
}

.research-hero h1 {
    max-width: 24ch;
}

.research-hero .article-kicker {
    padding-left: 0;
    border-left: 0;
}

.research-update {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
    font-size: 0.88rem;
}

.status-label {
    display: inline-block;
    margin: 0.5rem 0;
    padding: 0.25rem 0.6rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--text-muted);
    background: var(--surface-muted);
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
}

.status-label.operational {
    color: var(--accent-strong);
    border-color: var(--accent);
}

.status-label.caution {
    color: var(--caution-strong);
    border-color: var(--caution);
}

.research-thesis {
    margin: 1rem 0;
    padding: 1.1rem 1.2rem;
    border-left: 4px solid var(--accent);
    background: var(--surface-muted);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
}

.research-grid {
    display: grid;
    gap: 0.9rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.research-step {
    display: grid;
    grid-template-columns: 2rem 1fr;
    gap: 0.7rem;
    align-items: start;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
}

.research-step:last-child {
    border-bottom: 0;
}

.research-step > span {
    display: grid;
    place-items: center;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: var(--surface-muted);
    color: var(--accent);
    font-weight: 700;
}

.research-step h3 {
    margin: 0.2rem 0 0;
    font-size: 1rem;
}

.research-step .status-label {
    margin: 0.4rem 0 0;
}

.status-group h3 {
    margin-bottom: 0.2rem;
}

.status-group ul {
    margin-bottom: 0;
}

.principle-list h3 {
    margin-bottom: 0.25rem;
}

.principle-list p {
    color: var(--text-muted);
}

.publication-list article {
    padding: 1rem 0;
    border-bottom: 1px solid var(--line);
}

.publication-list article:last-child {
    border-bottom: 0;
}

.publication-list h3,
.publication-list p {
    margin: 0.25rem 0;
}

.research-feature {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border-left: 4px solid var(--accent);
}

.research-feature h2 {
    margin: 0.2rem 0 0.4rem;
}

.research-feature .button {
    flex: 0 0 auto;
}

.active-research {
    border-left: 4px solid var(--accent);
}

.active-research > p:not(.eyebrow) {
    max-width: 72ch;
    color: var(--text-muted);
}

.active-research .button {
    margin-top: 0.6rem;
}

.architecture-principle {
    padding: 0.8rem 1rem;
    border-left: 3px solid var(--accent);
    background: var(--surface-muted);
}

.research-article-header {
    margin-bottom: 2rem;
}

.research-article-header h1 {
    max-width: 22ch;
}

.research-article-header .lead {
    margin: 0;
    font-size: 1.15rem;
}

.article-body {
    max-width: 72ch;
    margin: 0 auto;
}

.article-body h2 {
    margin-top: 2.5rem;
}

.article-body blockquote {
    margin: 1rem 0;
    padding: 0.8rem 1rem;
    border-left: 3px solid var(--accent);
    background: var(--surface-muted);
}

.article-body blockquote p {
    margin: 0;
}

.research-annotation,
.terminology-panel,
.article-disclaimer {
    margin: 1.5rem 0;
    padding: 1rem 1.1rem;
    border: 1px solid var(--line);
    border-left: 4px solid var(--accent);
    border-radius: 12px;
    background: var(--surface-muted);
}

.research-annotation h2,
.terminology-panel h2,
.article-disclaimer h2 {
    margin: 0 0 0.45rem;
    font-size: 1rem;
}

.research-annotation p:last-child,
.terminology-panel p:last-child,
.article-disclaimer p:last-child {
    margin-bottom: 0;
}

.terminology-panel dl {
    margin-bottom: 0.75rem;
}

.terminology-panel dt {
    margin-top: 0.7rem;
    font-weight: 700;
}

.terminology-panel dd {
    margin: 0.2rem 0 0;
}

.evidence-comparison {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 1.25rem 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 12px;
}

.evidence-comparison > div {
    padding: 1rem;
}

.evidence-comparison > div + div {
    border-left: 1px solid var(--line);
    background: var(--surface-muted);
}

.evidence-comparison dt {
    margin-bottom: 0.4rem;
    color: var(--accent);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.evidence-comparison dd {
    margin: 0;
}

.architecture-flow {
    max-width: 36rem;
    margin: 1.5rem auto;
    padding: 0;
    list-style: none;
    counter-reset: architecture-step;
}

.architecture-flow li {
    position: relative;
    padding: 0.7rem 1rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--surface-muted);
    text-align: center;
    font-weight: 700;
}

.architecture-flow li:not(:last-child) {
    margin-bottom: 2rem;
}

.architecture-flow li:not(:last-child)::after {
    content: "↓";
    position: absolute;
    top: calc(100% + 0.2rem);
    left: 50%;
    color: var(--accent);
    font-size: 1.25rem;
    transform: translateX(-50%);
}

.series-footer {
    margin-top: 2.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
    color: var(--text-muted);
}

.series-footer a,
.publication-list a {
    color: var(--accent);
    font-weight: 700;
    text-decoration: none;
}

.series-footer a:hover,
.publication-list a:hover {
    text-decoration: underline;
}

.article-body code {
    overflow-wrap: break-word;
    word-break: break-word;
}

.article-body pre {
    margin: 1.4rem 0;
    padding: 1rem 1.2rem;
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface-muted);
}

.article-body pre code {
    overflow-wrap: normal;
    word-break: normal;
}

.article-body pre code {
    display: block;
    width: max-content;
    min-width: 100%;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    white-space: pre;
}

.article-image {
    margin: 1.4rem 0;
}

.article-image a {
    display: block;
}

.article-image img {
    display: block;
    width: min(100%, 760px);
    margin: 0 auto;
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: 0 12px 30px rgba(6, 35, 49, 0.13);
}

.article-image figcaption {
    margin-top: 0.55rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
}

.article-image figcaption a {
    display: inline;
    color: var(--accent);
    font-weight: 700;
    text-decoration: none;
}

.article-author {
    margin-top: 1.8rem;
    padding-top: 1.2rem;
    border-top: 1px solid var(--line);
    color: var(--text-muted);
    font-size: 0.96rem;
}

.article-author p {
    margin: 0 0 0.8rem;
}

.tech-list {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    margin: 1.4rem 0;
}

.tech-category {
    background: var(--surface-muted);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 1rem;
}

.tech-category h3 {
    margin: 0 0 0.5rem;
    font-size: 1rem;
    color: var(--accent);
}

.tech-category p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

.back-nav {
    margin-top: 1.2rem;
    text-align: center;
}

.contact-note {
    margin-top: 0.9rem !important;
    font-size: 0.95rem;
}

.resume-note {
    margin-top: 1.4rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    border-top: 1px solid var(--line);
    padding-top: 1rem;
    text-align: center;
}

footer {
    display: grid;
    gap: 0.35rem;
    padding-top: 1.2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-note a {
    color: var(--accent);
    font-weight: 700;
    text-decoration: none;
}

body.dark,
body[data-theme="dark"] {
    --bg: #0d171f;
    --surface: #132532;
    --surface-muted: #1a3140;
    --text: #e8f1f6;
    --text-muted: #b6c8d4;
    --line: #274557;
    --accent: #4dc0dd;
    --accent-strong: #2f95ad;
    --caution: #b9822f;
    --caution-strong: #f2b45c;
    --shadow: 0 16px 40px rgba(0, 0, 0, 0.36);
}

@media (prefers-color-scheme: dark) {
    body:not(.light):not([data-theme="light"]) {
        --bg: #0d171f;
        --surface: #132532;
        --surface-muted: #1a3140;
        --text: #e8f1f6;
        --text-muted: #b6c8d4;
        --line: #274557;
        --accent: #4dc0dd;
        --accent-strong: #2f95ad;
        --caution: #b9822f;
        --caution-strong: #f2b45c;
        --shadow: 0 16px 40px rgba(0, 0, 0, 0.36);
    }
}

@media (max-width: 860px) {
    .site-header {
        flex-wrap: wrap;
        justify-content: center;
    }

    nav {
        order: 3;
        width: 100%;
    }

    .site-wrap {
        width: min(1080px, 100% - 1.3rem);
    }

    .hero {
        padding: 2rem 1rem;
    }

    .content-section,
    .accomplishment-card {
        padding: 1.2rem;
    }

    .research-feature {
        align-items: flex-start;
        flex-direction: column;
    }

    .evidence-comparison {
        grid-template-columns: 1fr;
    }

    .evidence-comparison > div + div {
        border-top: 1px solid var(--line);
        border-left: 0;
    }

    .value-strip {
        grid-template-columns: 1fr;
    }
}