:root {
  color-scheme: dark;
  --background: #252b35;
  --ink: #edf0f5;
  --muted: #b8c1ce;
  --accent: #a7c0fa;
  --line: #414a59;
  --soft: #303a49;
  --button-text: #23314a;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 1.25rem; }
body { margin: 0; color: var(--ink); background: var(--background); font-size: 1rem; line-height: 1.55; }
::selection { background: #50638d; color: #fff; }
a { color: inherit; text-decoration: none; text-underline-offset: .25em; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; border-radius: 3px; }
p, h1, h2, h3, figure { margin: 0; }
h1, h2, h3 { line-height: 1.25; }
svg { width: 1.15rem; height: 1.15rem; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; flex: 0 0 auto; }
.wrap { max-width: 1088px; margin-inline: auto; padding-inline: 32px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 72px; }
.wordmark { font-size: 1.125rem; font-weight: 650; letter-spacing: -.035em; white-space: nowrap; }
nav { display: flex; align-items: center; gap: 24px; font-size: .875rem; color: var(--muted); }
nav a { padding-block: 10px; }
nav a:hover, .text-link:hover, .site-footer a:hover { color: var(--accent); text-decoration: underline; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr) 164px; align-items: center; gap: 40px; padding-block: 26px 32px; }
.eyebrow { font-size: .75rem; font-weight: 650; text-transform: uppercase; letter-spacing: .1em; color: var(--accent); margin-bottom: 10px; line-height: 1.5; }
h1 { font-family: Georgia, "Times New Roman", serif; font-size: clamp(2.5rem, 4.2vw, 3.125rem); font-weight: 400; letter-spacing: -.045em; margin-bottom: 12px; line-height: 1.13; }
.hero-description { font-size: 1.125rem; line-height: 1.5; max-width: 520px; color: var(--muted); }
.intro-links { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; margin-top: 18px; font-size: .875rem; }
.button { display: inline-flex; gap: 12px; align-items: center; justify-content: center; color: var(--button-text); background: var(--accent); padding: 9px 16px; min-height: 44px; border-radius: 6px; font-weight: 600; transition: background .18s; }
.button:hover { background: #c3d4fb; }
.text-link { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; font-size: .875rem; font-weight: 500; }
.portrait { align-self: center; }
.portrait img { display: block; width: 100%; height: 176px; object-fit: cover; object-position: 50% 40%; border-radius: 8px; background: var(--soft); }
.portrait figcaption { font-size: .75rem; color: var(--muted); margin-top: 8px; text-align: center; }
.portrait figcaption > span[aria-hidden] { margin-inline: 3px; }
.section { border-top: 1px solid var(--line); padding-block: 28px; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
h2 { font-size: 1.375rem; letter-spacing: -.025em; font-weight: 550; }
h3 { font-size: 1rem; font-weight: 600; letter-spacing: -.015em; }
.resume-link { color: var(--muted); white-space: nowrap; }
.experience-row { display: grid; grid-template-columns: 185px minmax(0, 1fr); gap: 28px; padding-block: 18px; border-bottom: 1px solid var(--line); }
.experience-row:first-child { padding-top: 0; }
.experience-row:last-child { padding-bottom: 0; border-bottom: none; }
.experience-date { font-size: .875rem; color: var(--muted); padding-top: 1px; }
.current-label { display: table; color: var(--accent); background: var(--soft); font-size: .75rem; border-radius: 4px; padding: 1px 8px; margin-top: 6px; }
.experience-content h3 { font-size: 1.0625rem; }
.role { color: var(--muted); font-size: .875rem; margin-top: 4px; line-height: 1.5; }
.role span { margin-inline: 4px; }
.experience-content > p:not(.role) { color: var(--muted); margin-top: 7px; }
.expertise-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.expertise-group p { color: var(--muted); margin-top: 7px; }
.education { display: flex; gap: 14px; align-items: center; padding-top: 18px; margin-top: 20px; border-top: 1px solid var(--line); }
.education-mark { flex-shrink: 0; display: grid; place-items: center; width: 42px; height: 42px; border-radius: 6px; background: var(--soft); color: var(--accent); font-family: Georgia, serif; font-weight: 600; font-size: .875rem; }
.education h3 { font-size: .9375rem; }
.education p { color: var(--muted); font-size: .875rem; margin-top: 3px; }
.project { display: grid; grid-template-columns: 185px minmax(0, 1fr); gap: 28px; }
.project-description p { color: var(--muted); margin-top: 7px; }
.contact { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.email-link { font-size: 1rem; border-bottom: 1px solid var(--line); padding-block: 10px; line-height: 1.5; }
.email-link span { margin-left: 12px; color: var(--accent); }
.email-link:hover { color: var(--accent); border-bottom-color: var(--accent); }
.site-footer { display: flex; justify-content: space-between; gap: 20px; align-items: center; padding-block: 10px; position: relative; color: var(--muted); font-size: .8125rem; }
.site-footer::before { content: ""; position: absolute; top: 0; left: 32px; right: 32px; height: 1px; background: var(--line); }
.site-footer a { min-height: 44px; display: flex; align-items: center; gap: 8px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0; }
.skip-link { position: fixed; left: 16px; top: -100px; z-index: 10; padding: 10px 20px; color: var(--button-text); background: var(--accent); border-radius: 5px; }
.skip-link:focus { top: 16px; }
@media (max-width: 760px) {
  .hero { gap: 24px; grid-template-columns: minmax(0, 1fr) 144px; }
  .portrait img { height: 158px; }
  nav { gap: 16px; }
  .experience-row { grid-template-columns: 170px minmax(0, 1fr); gap: 20px; }
  .expertise-grid { gap: 20px; }
}
@media (max-width: 600px) {
  .wrap { padding-inline: 20px; }
  .site-header { flex-wrap: wrap; align-content: center; gap: 2px; padding-block: 14px 4px; min-height: auto; }
  .wordmark { font-size: 1.0625rem; }
  nav { column-gap: 16px; row-gap: 0; flex-wrap: wrap; width: 100%; justify-content: space-between; font-size: .875rem; }
  .hero { position: relative; display: block; padding-block: 20px 24px; }
  .intro .eyebrow { max-width: calc(100% - 96px); min-height: 36px; margin-bottom: 7px; }
  h1 { font-size: clamp(1.875rem, 6.5vw, 2.5rem); max-width: calc(100% - 92px); margin-bottom: 16px; }
  .hero-description { max-width: 440px; }
  .intro-links { gap: 16px; margin-top: 14px; }
  .portrait { position: absolute; top: 18px; right: 0; width: 78px; }
  .portrait img { height: 84px; border-radius: 7px; }
  .portrait figcaption { display: none; }
  .section { padding-block: 24px; }
  .section-heading { flex-wrap: wrap; gap: 4px 16px; margin-bottom: 14px; }
  h2 { font-size: 1.25rem; }
  .experience-row { grid-template-columns: 1fr; gap: 6px; padding-block: 16px; }
  .experience-date { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
  .current-label { margin: 0; }
  .expertise-grid { grid-template-columns: 1fr; gap: 16px; }
  .expertise-group p { margin-top: 4px; }
  .education { margin-top: 18px; align-items: flex-start; }
  .project { grid-template-columns: 1fr; gap: 14px; }
  .contact { align-items: flex-start; flex-wrap: wrap; gap: 4px 20px; }
  .email-link { overflow-wrap: anywhere; }
  .site-footer::before { left: 20px; right: 20px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }
@media print {
  :root { color-scheme: light; --background: #fff; --ink: #172234; --muted: #536071; --accent: #2454be; --line: #dfe5ec; --soft: #edf2f8; }
  .site-header nav, .intro-links, .resume-link, .site-footer a { display: none; }
  .wrap { max-width: none; padding-inline: 0; }
  .experience-row, .expertise-group, .project, .contact { break-inside: avoid; }
}

/* Career timeline */
.experience { padding-top: 24px; }
.experience > .section-heading { margin-bottom: 24px; }
.timeline-layout { display: grid; grid-template-columns: 172px minmax(0, 1fr); gap: 32px; align-items: start; }
.timeline-rail { position: sticky; top: 28px; padding-block: 12px; }
.timeline-current .eyebrow { color: var(--muted); margin-bottom: 8px; }
.timeline-year { font-size: 3.25rem; letter-spacing: -.065em; line-height: 1.15; font-weight: 550; font-variant-numeric: tabular-nums; }
.timeline-year.is-range { font-size: 2.5rem; }
.timeline-range { color: var(--accent); font-size: .875rem; margin-top: 12px; }
.timeline-employer { font-size: .875rem; color: var(--muted); min-height: 44px; margin-top: 5px; }
.timeline-nav { display: flex; flex-direction: column; align-items: stretch; gap: 0; margin-top: 24px; }
.timeline-nav a { position: relative; display: flex; align-items: center; gap: 12px; padding: 12px 0 12px 14px; border-left: 2px solid var(--line); font-size: .875rem; line-height: 1.4; color: var(--muted); }
.timeline-nav a span { font-size: .75rem; font-variant-numeric: tabular-nums; color: var(--muted); }
.timeline-nav a[aria-current="step"] { color: var(--ink); border-color: var(--accent); background: linear-gradient(90deg, #a7c0fa12, transparent); }
.timeline-nav a[aria-current="step"] span { color: var(--accent); }
.timeline-position { display: flex; align-items: center; gap: 12px; margin-top: 24px; color: var(--muted); font-size: .75rem; font-variant-numeric: tabular-nums; }
.timeline-track { flex: 1; height: 2px; background: var(--line); overflow: hidden; }
.timeline-track span { display: block; width: 20%; height: 100%; background: var(--accent); transition: width .2s ease; }
.work-cards { display: grid; gap: 24px; min-width: 0; }
.work-card { --card-accent: #a7c0fa; --card-tint: #354760; padding: 28px; border: 1px solid #465160; border-radius: 14px; background: #2c3440; scroll-margin-top: 28px; transition: border-color .2s ease; min-width: 0; }
.work-card.is-active { border-color: var(--card-accent); }
.reliability-card { --card-accent: #9ed8bc; --card-tint: #334f49; }
.infrastructure-card { --card-accent: #ddc095; --card-tint: #514936; }
.security-card { --card-accent: #c5b4eb; --card-tint: #473e5b; }
.driver-card { --card-accent: #9bd3dd; --card-tint: #304b58; }
.card-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; }
.card-header h3 { font-size: 1.125rem; letter-spacing: -.02em; }
.card-header .role { font-size: .875rem; }
.card-date { flex-shrink: 0; color: var(--card-accent); font-size: .8125rem; line-height: 1.5; padding-top: 2px; }
.card-story { margin-top: 26px; }
.card-story h4 { font-size: clamp(1.5rem, 2.35vw, 1.875rem); font-weight: 550; letter-spacing: -.035em; line-height: 1.2; margin: 0; max-width: 620px; text-wrap: balance; }
.card-story p { color: var(--muted); margin-top: 12px; max-width: 650px; line-height: 1.6; }
.work-visual { margin-top: 24px; background: #252d38; border: 1px solid #414d5d; border-radius: 9px; padding: 20px; }
.visual-label { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 6px 16px; font-size: .75rem; color: var(--muted); }
.visual-label > span:first-child { color: var(--card-accent); }
.work-visual figcaption { color: var(--muted); font-size: .75rem; margin-top: 18px; }
.flow-row { display: grid; grid-template-columns: minmax(0, 1fr) 22px minmax(0, 1fr) 22px minmax(0, 1fr); align-items: center; gap: 8px; margin-top: 26px; }
.flow-node { border: 1px solid #526074; background: #303b4a; border-radius: 7px; padding: 16px 12px; min-width: 0; }
.flow-node.featured { border-color: var(--card-accent); background: var(--card-tint); }
.node-kicker { display: block; color: var(--muted); font-size: .75rem; line-height: 1.5; margin-bottom: 8px; }
.flow-node strong { display: block; font-size: .9375rem; font-weight: 550; line-height: 1.4; }
.flow-node small { display: block; color: var(--muted); font-size: .75rem; margin-top: 5px; line-height: 1.5; }
.flow-arrow { color: var(--card-accent); font-size: 1.375rem; text-align: center; }
.separate-path { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: .8125rem; margin-top: 20px; color: var(--muted); }
.path-line { width: 28px; border-top: 1px dashed var(--card-accent); }
.path-divider { color: #738198; }
.card-outcome { display: flex; justify-content: space-between; align-items: end; flex-wrap: wrap; gap: 14px 24px; margin-top: 22px; }
.outcome-label { display: block; color: var(--muted); font-size: .75rem; margin-bottom: 4px; }
.card-outcome strong { font-size: 1rem; font-weight: 550; color: var(--card-accent); }
.tech-note { color: var(--muted); font-size: .75rem; }
.reliability-bars { display: grid; gap: 20px; margin-block: 32px 26px; }
.reliability-row { display: grid; grid-template-columns: 50px 1fr 56px; align-items: center; gap: 16px; }
.reliability-row > span { color: var(--muted); font-size: .875rem; }
.reliability-row strong { font-size: 1.125rem; font-variant-numeric: tabular-nums; font-weight: 550; text-align: right; }
.reliability-track { background: #35404e; height: 20px; border-radius: 4px; overflow: hidden; }
.reliability-track > span { display: block; height: 100%; border-radius: 4px; }
.before-bar { width: 50%; background: #7b899e; }
.after-bar { width: 100%; background: var(--card-accent); }
.sequence { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; font-size: .875rem; }
.sequence > span:not([aria-hidden]) { padding: 7px 12px; border: 1px solid #4c655e; border-radius: 5px; }
.sequence > span[aria-hidden] { color: var(--card-accent); }
.isolation-flow { display: grid; grid-template-columns: minmax(0, .85fr) 30px minmax(0, 1.3fr); gap: 12px; align-items: center; margin-top: 22px; }
.mock-boundary { padding: 16px; border: 1px dashed var(--card-accent); border-radius: 8px; background: #ddc09507; }
.mock-boundary > strong { font-size: 1rem; font-weight: 550; }
.mock-boundary > small { display: block; color: var(--muted); font-size: .75rem; margin-top: 8px; }
.dependency-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; margin-top: 14px; }
.dependency-grid span { display: grid; place-items: center; height: 30px; color: var(--card-accent); background: var(--card-tint); border: 1px solid #74634a; border-radius: 4px; font: .75rem ui-monospace, monospace; }
.security-flow { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 26px; gap: 16px; }
.security-stage { position: relative; min-width: 0; }
.stage-number { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--card-accent); background: var(--card-tint); border-radius: 50%; font: .75rem ui-monospace, monospace; color: var(--card-accent); position: relative; z-index: 1; }
.security-stage:not(:last-child)::after { content: ''; position: absolute; height: 1px; top: 17px; left: 34px; right: -16px; background: #716786; }
.security-stage > div { padding: 16px 0 14px; }
.security-stage strong { display: block; font-size: 1rem; font-weight: 550; }
.security-stage small { display: block; margin-top: 6px; font-size: .8125rem; color: var(--muted); }
.driver-stack { max-width: 500px; margin: 20px auto 0; }
.driver-stack > div { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 16px; border: 1px solid #526074; border-radius: 6px; background: #303b4a; }
.driver-stack strong { font-size: .9375rem; font-weight: 550; }
.driver-stack > div > span { color: var(--muted); font-size: .75rem; }
.driver-stack .bridge-layer { background: var(--card-tint); border-color: var(--card-accent); }
.stack-arrow { display: block; text-align: center; color: var(--card-accent); line-height: 1.25; margin-block: 3px; }
@media (max-width: 1050px) {
  .timeline-layout { grid-template-columns: 155px minmax(0, 1fr); gap: 24px; }
  .work-card { padding: 24px; }
  .card-header { flex-wrap: wrap; gap: 8px; }
  .work-visual { padding: 16px; }
  .flow-row { gap: 5px; grid-template-columns: minmax(0, 1fr) 16px minmax(0, 1fr) 16px minmax(0, 1fr); }
  .flow-node { padding: 14px 10px; }
}
@media (max-width: 760px) {
  .timeline-layout { display: block; }
  .timeline-rail { top: 0; z-index: 5; background: var(--background); border-bottom: 1px solid var(--line); padding: 12px 0; margin-bottom: 18px; }
  .timeline-current { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 2px 20px; }
  .timeline-current .eyebrow { display: none; }
  .timeline-year, .timeline-year.is-range { grid-row: span 2; font-size: 2rem; }
  .timeline-range { margin-top: 0; text-align: right; }
  .timeline-employer { min-height: 0; margin: 0; text-align: right; font-size: .8125rem; }
  .timeline-nav { display: none; }
  .timeline-position { display: none; }
  .work-card { scroll-margin-top: 98px; }
  .work-cards { gap: 20px; }
  .card-story h4 { font-size: 1.625rem; }
}
@media (max-width: 480px) {
  .work-card { padding: 20px 16px; border-radius: 10px; }
  .card-header h3 { font-size: 1.0625rem; }
  .card-story { margin-top: 20px; }
  .card-story h4 { font-size: 1.5rem; }
  .work-visual { margin-inline: -4px; padding: 14px 12px; }
  .visual-label { font-size: .75rem; }
  .flow-row { display: flex; flex-direction: column; align-items: stretch; gap: 6px; margin-top: 18px; }
  .flow-node { padding: 12px; }
  .flow-arrow { transform: rotate(90deg); line-height: 1; align-self: center; }
  .node-kicker { margin-bottom: 4px; }
  .flow-node small { margin-top: 3px; }
  .separate-path { gap: 6px; font-size: .75rem; }
  .path-line { width: 16px; }
  .reliability-row { grid-template-columns: 42px 1fr 48px; gap: 10px; }
  .reliability-row strong { font-size: 1rem; }
  .reliability-bars { margin-block: 24px; }
  .sequence { gap: 6px; font-size: .75rem; }
  .sequence > span:not([aria-hidden]) { padding: 6px; }
  .isolation-flow { display: flex; flex-direction: column; align-items: stretch; gap: 10px; }
  .mock-boundary { padding: 12px; }
  .security-flow { grid-template-columns: 1fr; gap: 0; }
  .security-stage { display: flex; gap: 14px; align-items: flex-start; }
  .security-stage > div { padding: 4px 0 20px; }
  .security-stage:last-child > div { padding-bottom: 4px; }
  .security-stage small { margin-top: 4px; }
  .security-stage:not(:last-child)::after { top: 34px; bottom: 0; left: 17px; right: auto; width: 1px; height: auto; }
  .stage-number { flex-shrink: 0; }
  .driver-stack > div { align-items: flex-start; flex-direction: column; gap: 4px; padding: 10px 12px; }
  .card-outcome { margin-top: 18px; gap: 10px; }
}
@media (prefers-reduced-motion: reduce) { .work-card, .timeline-track span { transition: none; } }
@media print {
  .timeline-layout { display: block; }
  .timeline-rail { display: none; }
  .work-card { break-inside: avoid; background: white; border: 1px solid #aaa; }
  .work-visual, .flow-node, .driver-stack > div { background: #f1f3f6; }
  .work-card { --card-accent: #315878; --card-tint: #e1e9ef; }
}