/* Primitive → semantic tokens. See .ui-craft/tokens.md for design decisions. */
:root {
  --charcoal-950: #141619;
  --charcoal-900: #1c1f23;
  --charcoal-800: #272b31;
  --charcoal-700: #353a42;
  --gray-500: #6b737f;
  --gray-400: #969da7;
  --gray-300: #b6bac2;
  --gray-50: #f1f1ee;
  --blue-600: #2b5bd1;
  --blue-500: #3564df;
  --blue-300: #94b7ff;
  --red-300: #ffaaaa;
  --surface-canvas: var(--charcoal-950);
  --surface-raised: var(--charcoal-900);
  --surface-overlay: var(--charcoal-800);
  --text-primary: var(--gray-50);
  --text-secondary: var(--gray-300);
  --text-muted: var(--gray-400);
  --accent: var(--blue-600);
  --accent-hover: var(--blue-500);
  --link: var(--blue-300);
  --border: var(--charcoal-700);
  --input-border: var(--gray-500);
  --error: var(--red-300);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --radius-sm: 2px;
  --radius-control: 6px;
  --radius-panel: 10px;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --type-small: 0.875rem;
  --type-body: 1rem;
  --type-lead: clamp(1.125rem, 1.7vw, 1.5rem);
  --type-section: clamp(2rem, 4.1vw, 3.75rem);
  --type-display: clamp(4.25rem, 10.1vw, 9.75rem);
  --duration-fast: 150ms;
  --duration-normal: 200ms;
  --duration-entrance: 350ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --z-sticky: 20;
  --z-skip: 30;
  --page-gutter: clamp(1.25rem, 5vw, 5rem);
  --content-width: 1280px;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--space-24); }
body { margin: 0; background: var(--surface-canvas); color: var(--text-primary); font: 400 var(--type-body)/1.65 var(--font-body); -webkit-font-smoothing: antialiased; }
body, h1, h2, h3, h4, p, figure, ul, ol, dl, dd { margin: 0; }
button, input, textarea { font: inherit; }
button, a, summary { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
button, summary { cursor: pointer; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.25em; transition: color var(--duration-fast); }
a:hover { color: var(--link); }
button { color: inherit; }
img { display: block; max-width: 100%; }
svg { display: block; flex: 0 0 auto; }
button svg, a svg, summary svg { width: 20px; height: 20px; }
::selection { background: var(--accent); color: var(--text-primary); }
:focus-visible { outline: 2px solid var(--link); outline-offset: 5px; }
[hidden] { display: none !important; }
.container { width: min(calc(100% - var(--page-gutter) * 2), var(--content-width)); margin-inline: auto; }
.section { padding-block: var(--space-24); border-top: 1px solid var(--border); }
h1, h2, h3 { font-weight: 500; letter-spacing: -0.045em; text-wrap: balance; }
h2 { font-size: var(--type-section); line-height: 1.12; }
h3 { font-size: var(--type-lead); line-height: 1.35; }
p { color: var(--text-secondary); }
.small { font-size: var(--type-small); }
.muted { color: var(--text-muted); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: var(--space-8); margin-bottom: var(--space-12); }
.section-heading > p { max-width: 32ch; font-size: var(--type-small); }
.kicker { display: flex; align-items: center; gap: var(--space-3); color: var(--text-secondary); font-size: var(--type-small); margin-bottom: var(--space-6); }
.kicker::before { content: ''; width: 24px; height: 2px; background: var(--accent); }
.text-link { display: inline-flex; align-items: center; justify-content: space-between; gap: var(--space-4); min-height: 44px; font-size: var(--type-small); text-decoration: none; }
.text-link span { border-bottom: 1px solid var(--input-border); }
.button { display: inline-flex; justify-content: center; align-items: center; gap: var(--space-6); min-height: 52px; padding: var(--space-3) var(--space-6); border: 1px solid transparent; border-radius: var(--radius-control); background: var(--accent); color: var(--text-primary); font-weight: 500; font-size: var(--type-small); text-decoration: none; transition: background-color var(--duration-fast), transform var(--duration-fast); }
.button:hover { background: var(--accent-hover); color: var(--text-primary); transition-duration: var(--duration-normal); }
.button:active { transform: translateY(1px); }
.button:disabled { cursor: wait; background: var(--surface-overlay); color: var(--text-secondary); }
.skip-link { position: fixed; top: var(--space-4); left: var(--space-4); padding: var(--space-3) var(--space-6); background: var(--text-primary); color: var(--surface-canvas); transform: translateY(-200%); z-index: var(--z-skip); }
.skip-link:focus { transform: translateY(0); }

/* A quiet header leaves the masthead in charge. */
.site-header { position: sticky; top: 0; z-index: var(--z-sticky); background: var(--surface-canvas); }
.header-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--border); gap: var(--space-8); }
.wordmark { min-height: 44px; display: inline-flex; align-items: center; font-size: 1.5rem; font-weight: 600; letter-spacing: -0.06em; text-decoration: none; }
.wordmark span { color: var(--link); }
.desktop-nav { display: flex; align-items: center; gap: var(--space-8); }
.desktop-nav a { display: inline-flex; min-height: 44px; align-items: center; color: var(--text-secondary); font-size: var(--type-small); text-decoration: none; }
.desktop-nav a:hover, .desktop-nav a[aria-current] { color: var(--text-primary); }
.desktop-nav .nav-contact { color: var(--text-primary); gap: var(--space-3); margin-left: var(--space-6); }
.mobile-nav { display: none; }

/* Stacked identity: the name crosses the full grid above an offset portrait. */
.hero { padding-top: var(--space-24); padding-bottom: var(--space-16); }
.hero h1 { font-size: var(--type-display); line-height: 1; letter-spacing: -0.065em; margin-left: -0.045em; white-space: nowrap; }
.hero h1 span { color: var(--text-muted); }
.hero-bottom { display: grid; grid-template-columns: 0.82fr 1.18fr; gap: var(--space-16); margin-top: var(--space-12); align-items: start; }
.hero-copy { padding-top: var(--space-4); }
.hero-copy > p { max-width: 24ch; font-size: var(--type-lead); line-height: 1.55; color: var(--text-primary); text-wrap: pretty; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-6); margin-top: var(--space-8); }
.hero-photo { margin: 0; }
.hero-photo img { width: 100%; height: clamp(380px, 44vw, 600px); object-fit: cover; object-position: 50% 10%; filter: grayscale(100%); border-radius: var(--radius-sm); background: var(--surface-raised); }
.hero-photo figcaption { display: flex; justify-content: space-between; gap: var(--space-4); font-size: 0.75rem; color: var(--text-muted); padding-top: var(--space-3); }
.hero-copy .hero-location { margin-top: var(--space-24); font-size: var(--type-small); color: var(--text-muted); }

/* Proof belongs to the story below the fold. */
.proof-strip { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--border); padding-block: var(--space-12); gap: var(--space-8); }
.proof-strip > div { display: flex; flex-direction: column-reverse; gap: var(--space-2); }
.proof-strip dt { color: var(--text-muted); font-size: var(--type-small); }
.proof-strip dd { font-size: clamp(2rem, 3.6vw, 3.5rem); font-weight: 500; line-height: 1.2; letter-spacing: -0.045em; font-variant-numeric: tabular-nums; }

/* The venture is a substantial editorial feature, not a set of feature cards. */
.venture { background: var(--surface-raised); }
.venture-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-16); }
.venture-header .kicker { margin: 0; }
.venture-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: var(--space-16); }
.venture h2 { max-width: 16ch; font-size: clamp(2.5rem, 5.5vw, 5rem); }
.venture-copy > p + p { margin-top: var(--space-6); }
.venture-copy .text-link { margin-top: var(--space-6); color: var(--link); }
.venture-proof { margin-top: var(--space-16); display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-8); border-top: 1px solid var(--border); padding-top: var(--space-8); }
.venture-proof p:first-child { font-size: var(--type-section); line-height: 1.2; color: var(--text-primary); font-variant-numeric: tabular-nums; letter-spacing: -0.04em; }
.venture-proof p + p { font-size: var(--type-small); color: var(--text-muted); margin-top: var(--space-2); }
.archive { border-top: 1px solid var(--border); margin-top: var(--space-12); }
.archive > summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); padding-block: var(--space-6); font-size: var(--type-small); font-weight: 500; }
.archive > summary::-webkit-details-marker { display: none; }
.archive > summary svg { transition: transform var(--duration-normal) var(--ease-out); }
.archive[open] > summary svg { transform: rotate(45deg); }
.archive > summary:hover { color: var(--link); }
.archive-body { padding-block: var(--space-4) var(--space-8); }
.milestone-list { list-style: none; padding: 0; }
.milestone-list li { display: grid; grid-template-columns: 120px 1fr; gap: var(--space-6); padding-block: var(--space-4); border-bottom: 1px solid var(--border); font-size: var(--type-small); }
.milestone-list time { color: var(--text-muted); font-variant-numeric: tabular-nums; }
.milestone-list p { max-width: 70ch; }

/* Biography and career use reading columns and dated rows. */
.about-layout { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: var(--space-24); }
.about-layout h2 { max-width: 12ch; }
.about-copy > p { font-size: var(--type-lead); max-width: 50ch; }
.about-copy > p + p { margin-top: var(--space-6); font-size: var(--type-body); }
.biography-grid { display: grid; gap: var(--space-8); }
.biography-grid h3 { font-size: var(--type-body); margin-bottom: var(--space-2); letter-spacing: -0.02em; }
.biography-grid p { font-size: var(--type-small); }
.career-list { list-style: none; padding: 0; }
.career-item { display: grid; grid-template-columns: 180px 1fr 1.1fr; gap: var(--space-8); border-top: 1px solid var(--border); padding-block: var(--space-8); }
.career-item .year { font-variant-numeric: tabular-nums; color: var(--text-muted); font-size: var(--type-small); }
.career-item .org { color: var(--text-muted); font-size: var(--type-small); margin-top: var(--space-2); }
.career-item > p { font-size: var(--type-small); max-width: 55ch; }
.career-item h3 { font-size: 1.25rem; }
.career-item:first-child .year { color: var(--link); }
.expertise { list-style: none; display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-8); border-top: 1px solid var(--border); padding: var(--space-6) 0 0; color: var(--text-muted); font-size: var(--type-small); }
.expertise li { display: flex; align-items: center; gap: var(--space-3); }
.expertise svg { width: 16px; height: 16px; }

/* Authored writing gets an asymmetric feature; the full bibliography remains. */
.writing-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: var(--space-16); }
.writing-feature { display: flex; flex-direction: column; justify-content: space-between; min-height: 340px; padding: var(--space-8); background: var(--surface-raised); border-radius: var(--radius-panel); text-decoration: none; transition: background-color var(--duration-fast); }
.writing-feature h3 { font-size: clamp(2rem, 3.4vw, 3rem); max-width: 18ch; margin-block: var(--space-12); }
.writing-feature .meta, .article-row .meta { color: var(--text-muted); font-size: var(--type-small); }
.writing-feature .article-action { display: flex; align-items: center; justify-content: space-between; color: var(--link); font-size: var(--type-small); }
.writing-feature:hover { background: var(--surface-overlay); color: var(--text-primary); }
.writing-secondary { display: flex; flex-direction: column; }
.article-row { display: grid; grid-template-columns: 1fr auto; gap: var(--space-6); border-top: 1px solid var(--border); padding-block: var(--space-8); text-decoration: none; }
.article-row h3, .article-row h4 { font-size: var(--type-lead); font-weight: 500; letter-spacing: -0.03em; line-height: 1.4; margin-top: var(--space-3); }
.article-row > svg { margin-top: var(--space-1); color: var(--text-muted); }
.writing-secondary .article-row { flex: 1; }
.article-archive .article-row { padding-block: var(--space-6); }
.article-archive h3 { font-size: var(--type-body); letter-spacing: -0.02em; max-width: 70ch; }

.recognition-layout { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: var(--space-24); }
.recognition-layout > div:first-child > p { margin-top: var(--space-6); max-width: 28ch; }
.recognition-list { list-style: none; padding: 0; }
.recognition-item { display: grid; grid-template-columns: 72px 1fr; gap: var(--space-6); padding-block: var(--space-6); border-top: 1px solid var(--border); }
.recognition-item time { color: var(--text-muted); font-size: var(--type-small); font-variant-numeric: tabular-nums; }
.recognition-item h3, .recognition-item h4 { font-size: var(--type-body); font-weight: 500; line-height: 1.5; letter-spacing: -0.02em; }
.recognition-item p { font-size: var(--type-small); color: var(--text-muted); margin-top: var(--space-1); }
.recognition-item p a { color: var(--link); }
.press { padding-top: 0; border-top: 0; }
.press .archive { margin: 0; }
.press .archive > summary { padding-block: var(--space-8); }
.press-summary { display: flex; align-items: baseline; gap: var(--space-8); }
.press-summary h2 { font-size: var(--type-lead); letter-spacing: -0.03em; }
.press-summary p { font-size: var(--type-small); }
.stack .section-heading { margin-bottom: 0; }
.stack-list > div { display: grid; grid-template-columns: 200px 1fr; gap: var(--space-8); padding-block: var(--space-6); border-bottom: 1px solid var(--border); }
.stack-list dt { color: var(--text-primary); }
.stack-list dd { color: var(--text-secondary); }
.stack-list .stack-note { margin-top: var(--space-2); font-size: var(--type-small); color: var(--text-muted); }

/* Contact: readable labels, explicit status, and resilient native submission. */
.contact { background: var(--surface-raised); }
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-24); }
.contact-intro h2 { font-size: clamp(2.5rem, 5.3vw, 4.75rem); max-width: 10ch; }
.contact-intro > p { margin-top: var(--space-8); max-width: 30ch; }
.contact-intro .text-link { margin-top: var(--space-8); }
.contact-form { display: grid; gap: var(--space-6); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); }
.form-field { min-width: 0; }
.form-field label { display: block; font-size: var(--type-small); margin-bottom: var(--space-2); }
.form-field label span { color: var(--text-muted); font-weight: 400; }
.form-field input, .form-field textarea { width: 100%; background: var(--surface-canvas); border: 1px solid var(--input-border); border-radius: var(--radius-control); padding: var(--space-3) var(--space-4); color: var(--text-primary); transition: border-color var(--duration-fast); }
.form-field textarea { resize: vertical; min-height: 144px; }
.form-field input::placeholder, .form-field textarea::placeholder { color: var(--text-muted); }
.form-field input:focus, .form-field textarea:focus { border-color: var(--link); }
.form-field [aria-invalid='true'] { border-color: var(--error); }
.field-error { color: var(--error); font-size: var(--type-small); margin-top: var(--space-2); }
.field-error:empty { display: none; }
.form-status { font-size: var(--type-small); color: var(--text-secondary); }
.form-status[data-state='error'] { color: var(--error); }
.form-status:empty { display: none; }
.form-foot { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); }
.form-foot p { color: var(--text-muted); font-size: 0.75rem; max-width: 23ch; }
.thank-you { padding-block: var(--space-12); }
.thank-you h3 { font-size: var(--type-section); margin-bottom: var(--space-6); }
.thank-you button { margin-top: var(--space-8); }
.noscript-note { font-size: var(--type-small); color: var(--text-muted); }

.site-footer { padding-block: var(--space-16) var(--space-8); }
.footer-top { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--space-12); padding-bottom: var(--space-16); }
.footer-identity h2 { font-size: var(--type-lead); margin-bottom: var(--space-3); }
.footer-identity p { font-size: var(--type-small); color: var(--text-muted); }
.footer-nav h3, .footer-profiles h3 { font-size: var(--type-small); font-weight: 500; letter-spacing: 0; margin-bottom: var(--space-4); }
.footer-nav ul, .footer-profiles ul { list-style: none; padding: 0; }
.footer-nav ul { columns: 2; column-gap: var(--space-6); }
.footer-nav a, .footer-profiles a { display: inline-flex; align-items: center; min-height: 44px; font-size: var(--type-small); text-decoration: none; color: var(--text-muted); }
.footer-nav a:hover, .footer-profiles a:hover { color: var(--text-primary); }
.footer-profiles details { margin-top: var(--space-2); }
.footer-profiles summary { min-height: 44px; font-size: var(--type-small); color: var(--text-muted); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: var(--space-6); padding-top: var(--space-6); border-top: 1px solid var(--border); }
.footer-bottom p, .footer-bottom a { font-size: 0.75rem; color: var(--text-muted); }

@media (prefers-reduced-motion: no-preference) {
  .hero h1 { animation: arrive var(--duration-entrance) var(--ease-out) both; }
  @keyframes arrive { from { opacity: 0.4; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
}
@media (hover: hover) and (pointer: fine) {
  .text-link svg, .article-row > svg { transition: transform var(--duration-fast) var(--ease-out); }
  .text-link:hover svg, .article-row:hover > svg { transform: translate(2px, -2px); }
}
@media (max-width: 1024px) {
  .hero-bottom { gap: var(--space-8); }
  .hero-copy .hero-location { margin-top: var(--space-12); }
  .about-layout, .contact-layout, .recognition-layout { gap: var(--space-12); }
  .career-item { grid-template-columns: 140px 1fr 1fr; gap: var(--space-6); }
  .venture-grid { gap: var(--space-12); }
  .writing-grid { gap: var(--space-8); }
  .desktop-nav { gap: var(--space-6); }
}
@media (max-width: 760px) {
  :root { --page-gutter: var(--space-6); }
  .header-inner { min-height: 72px; }
  .desktop-nav { display: none; }
  .mobile-nav { display: block; }
  .mobile-nav > summary { display: flex; align-items: center; gap: var(--space-3); min-height: 44px; list-style: none; font-size: var(--type-small); }
  .mobile-nav > summary::-webkit-details-marker { display: none; }
  .mobile-nav[open] > summary svg { transform: rotate(45deg); }
  .mobile-nav nav { position: absolute; inset: 100% 0 auto; padding: var(--space-4) var(--page-gutter) var(--space-6); background: var(--surface-overlay); border-bottom: 1px solid var(--border); max-height: calc(100svh - 72px); overflow-y: auto; }
  .mobile-nav nav a { display: flex; align-items: center; justify-content: space-between; min-height: 48px; text-decoration: none; border-bottom: 1px solid var(--border); }
  .hero { padding-top: var(--space-16); padding-bottom: var(--space-12); }
  .hero h1 { font-size: clamp(3.35rem, 12.7vw, 6.5rem); white-space: normal; max-width: 10ch; line-height: 0.98; }
  .hero h1 span { display: block; }
  .hero-bottom { grid-template-columns: 1fr; gap: var(--space-12); margin-top: var(--space-8); }
  .hero-copy { padding: 0; }
  .hero-copy > p { max-width: 36ch; }
  .hero-actions { margin-top: var(--space-6); }
  .hero-copy .hero-location { margin-top: var(--space-6); }
  .hero-photo img { height: clamp(340px, 100vw, 560px); object-position: 50% 8%; }
  .hero-photo figcaption { font-size: 0.75rem; }
  .section { padding-block: var(--space-16); }
  .section-heading { align-items: start; flex-direction: column; gap: var(--space-4); margin-bottom: var(--space-8); }
  .section-heading > p { max-width: 45ch; }
  .proof-strip { padding-block: var(--space-8); gap: var(--space-6); }
  .proof-strip dt { font-size: 0.75rem; }
  .proof-strip dd { font-size: 2rem; }
  .venture-header { margin-bottom: var(--space-8); gap: var(--space-4); }
  .venture-grid, .about-layout, .writing-grid, .recognition-layout, .contact-layout { grid-template-columns: 1fr; gap: var(--space-8); }
  .venture h2 { max-width: 18ch; }
  .venture-proof { margin-top: var(--space-8); }
  .venture-proof p:first-child { font-size: 2rem; }
  .about-layout h2 { max-width: 18ch; }
  .archive { margin-top: var(--space-8); }
  .career-item { grid-template-columns: 1fr; gap: var(--space-3); padding-block: var(--space-6); }
  .career-item > p { margin-top: var(--space-2); }
  .writing-feature { min-height: 300px; padding: var(--space-6); }
  .writing-feature h3 { margin-block: var(--space-8); }
  .article-row { padding-block: var(--space-6); }
  .press { padding-top: 0; }
  .press-summary { display: block; }
  .press-summary p { margin-top: var(--space-2); }
  .stack-list > div { grid-template-columns: 1fr; gap: var(--space-2); }
  .contact-intro h2 { max-width: 12ch; }
  .contact-intro > p, .contact-intro .text-link { margin-top: var(--space-6); }
  .contact-form { margin-top: var(--space-6); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: var(--space-8); padding-bottom: var(--space-8); }
  .footer-identity { grid-column: 1 / -1; }
  .footer-nav ul { columns: 1; }
  .footer-bottom { align-items: start; }
}
@media (max-width: 390px) {
  :root { --page-gutter: var(--space-4); }
  .hero-actions { gap: var(--space-4); }
  .form-row { grid-template-columns: 1fr; }
  .proof-strip { gap: var(--space-4); }
  .milestone-list li { grid-template-columns: 80px 1fr; gap: var(--space-4); }
  .form-foot { align-items: start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}