:root {
  color-scheme: light;
  --bg: #f7f8f5;
  --surface: #ffffff;
  --surface-muted: #edf3ef;
  --surface-strong: #12212b;
  --ink: #12212b;
  --ink-soft: #40515c;
  --ink-muted: #6f7d84;
  --border: #dce5e1;
  --border-strong: #b8cbc4;
  --accent: #087f73;
  --accent-hover: #056258;
  --accent-soft: #e4f3ed;
  --warm: #b9622b;
  --warm-soft: #fff0e5;
  --success: #16734a;
  --shadow-sm: 0 8px 24px rgba(18, 33, 43, 0.06);
  --shadow-lg: 0 26px 70px rgba(18, 33, 43, 0.12);
  --max: 1240px;
  --nav-height: 76px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d171b;
  --surface: #142228;
  --surface-muted: #1a2b31;
  --surface-strong: #f4f7f3;
  --ink: #f4f7f3;
  --ink-soft: #c0cfca;
  --ink-muted: #8ea09e;
  --border: #2a3d42;
  --border-strong: #496166;
  --accent: #55c7ae;
  --accent-hover: #8be0ca;
  --accent-soft: #173a38;
  --warm: #f2a36d;
  --warm-soft: #3b2920;
  --success: #7dd3a7;
  --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.16);
  --shadow-lg: 0 28px 80px rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open { overflow: hidden; }

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

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

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

button { font: inherit; }

:focus-visible {
  outline: 3px solid var(--warm);
  outline-offset: 4px;
}

::selection { background: var(--accent); color: #ffffff; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -100px;
  z-index: 300;
  background: var(--surface-strong);
  color: var(--bg);
  padding: 10px 14px;
  font-weight: 800;
}

.skip-link:focus { top: 16px; }

.container {
  width: min(var(--max), calc(100% - 48px));
  margin-inline: auto;
}

.narrow { max-width: 760px; }

.section {
  padding: 104px 0;
  scroll-margin-top: calc(var(--nav-height) + 20px);
}

.section-band {
  border-block: 1px solid var(--border);
  background: var(--surface-muted);
}

.section-dark {
  background: var(--surface-strong);
  color: var(--bg);
}

.section-heading { max-width: 820px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
}

h1, h2, h3, p, ul, dl { margin: 0; }

h1, h2, h3 { text-wrap: balance; }

h1 {
  max-width: 800px;
  font-size: clamp(3.2rem, 8vw, 6.8rem);
  line-height: 0.96;
  letter-spacing: -0.055em;
}

h2 {
  max-width: 760px;
  font-size: clamp(2.05rem, 4.2vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

h3 {
  font-size: 1.15rem;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

.section-copy,
.lead {
  margin-top: 20px;
  max-width: 720px;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.25vw, 1.15rem);
  line-height: 1.7;
}

.section-dark .section-copy,
.section-dark .lead { color: #c6d5d0; }

.muted { color: var(--ink-muted); }

.link {
  color: var(--accent);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: var(--nav-height);
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(18px);
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.site-header.scrolled {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.nav {
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
  font-weight: 850;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  background: var(--surface-strong);
  color: var(--bg);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
}

.brand-name { line-height: 1.1; }

.brand-role {
  display: block;
  margin-top: 3px;
  color: var(--ink-muted);
  font-size: 0.74rem;
  font-weight: 650;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  margin-left: auto;
}

.nav-links a,
.nav-actions a,
.nav-actions button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--ink-soft);
  font-size: 0.86rem;
  font-weight: 750;
  padding: 9px 11px;
  transition: color 160ms ease, background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.nav-links a:hover,
.nav-actions a:hover,
.nav-actions button:hover {
  color: var(--ink);
  background: var(--surface-muted);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-actions .nav-quiet { display: inline-flex; }

.nav-actions .nav-contact,
.button-primary {
  border-color: transparent;
  background: var(--accent);
  color: #ffffff;
}

.nav-actions .nav-contact:hover,
.button-primary:hover {
  background: var(--accent-hover);
  color: #ffffff;
  transform: translateY(-1px);
}

.theme-toggle {
  cursor: pointer;
  background: transparent;
}

.theme-icon { font-size: 1rem; line-height: 1; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
  transition: transform 160ms ease, opacity 160ms ease;
}

.nav-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.button-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 820;
  padding: 11px 16px;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, color 160ms ease;
}

.button:hover { transform: translateY(-2px); border-color: var(--accent); }
.button-secondary { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.button-ghost { border-color: transparent; background: transparent; color: var(--ink-soft); }
.button-ghost:hover { background: var(--surface-muted); color: var(--ink); }
.button-warm { border-color: transparent; background: var(--warm); color: #ffffff; }
.button-warm:hover { background: #9d4f20; color: #ffffff; }

.hero {
  padding: 72px 0 96px;
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  gap: clamp(42px, 8vw, 120px);
  align-items: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 24px;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-kicker::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--success) 18%, transparent);
}

.hero-title { margin-top: 12px; }

.hero-statement {
  max-width: 650px;
  margin-top: 24px;
  color: var(--ink-soft);
  font-size: clamp(1.3rem, 2.35vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.hero-copy .lead { max-width: 620px; }

.hero-actions { margin-top: 32px; }

.hero-socials {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 20px;
  color: var(--ink-muted);
  font-size: 0.88rem;
  font-weight: 750;
}

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

.portrait-wrap { position: relative; max-width: 430px; margin-left: auto; }

.portrait-wrap::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 28px;
  width: 56px;
  height: 56px;
  border-left: 2px solid var(--warm);
  border-top: 2px solid var(--warm);
}

.portrait-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 5;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: var(--surface-muted);
  box-shadow: var(--shadow-lg);
}

.portrait-frame img { width: 100%; height: 100%; object-fit: cover; object-position: center 18%; }

.portrait-caption {
  position: absolute;
  right: -26px;
  bottom: 24px;
  width: min(250px, 65%);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  padding: 16px;
}

.portrait-caption strong { display: block; font-size: 0.94rem; }
.portrait-caption span { display: block; margin-top: 4px; color: var(--ink-muted); font-size: 0.78rem; line-height: 1.4; }

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-block: 1px solid var(--border);
}

.metric-item {
  min-height: 132px;
  padding: 26px 24px;
  border-right: 1px solid var(--border);
}

.metric-item:last-child { border-right: 0; }
.metric-value { color: var(--ink); font-size: 1.24rem; font-weight: 850; line-height: 1.15; }
.metric-label { margin-top: 8px; color: var(--ink-muted); font-size: 0.84rem; line-height: 1.4; }

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.9fr);
  gap: 64px;
  align-items: start;
  margin-top: 42px;
}

.about-copy p + p { margin-top: 18px; }

.signal-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border);
}

.signal-list div {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.signal-list dt { color: var(--ink-muted); font-size: 0.76rem; font-weight: 850; letter-spacing: 0.08em; text-transform: uppercase; }
.signal-list dd { margin: 0; color: var(--ink-soft); font-size: 0.92rem; font-weight: 700; }

.timeline { position: relative; display: grid; gap: 28px; margin-top: 44px; }

.timeline::before { content: ""; position: absolute; left: 10px; top: 12px; bottom: 12px; width: 1px; background: var(--border-strong); }

.timeline-item { position: relative; display: grid; grid-template-columns: 190px 1fr; gap: 38px; padding-left: 40px; }

.timeline-item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  width: 11px;
  height: 11px;
  border: 3px solid var(--bg);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.timeline-time { color: var(--ink-muted); font-size: 0.84rem; font-weight: 800; line-height: 1.4; }
.timeline-company { margin-top: 8px; color: var(--ink); font-size: 1rem; font-weight: 850; }
.timeline-role { color: var(--accent); font-size: 0.9rem; font-weight: 750; }
.timeline-content h3 { font-size: 1.4rem; }
.timeline-content p { max-width: 700px; margin-top: 10px; color: var(--ink-soft); }
.timeline-list { display: grid; gap: 8px; margin-top: 16px; padding: 0; list-style: none; color: var(--ink-soft); }
.timeline-list li { position: relative; padding-left: 18px; }
.timeline-list li::before { content: ""; position: absolute; left: 0; top: 0.72em; width: 5px; height: 5px; border-radius: 50%; background: var(--warm); }
.tag-list { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; padding: 0; list-style: none; }
.tag { display: inline-flex; border: 1px solid var(--border); border-radius: 999px; background: var(--surface-muted); color: var(--ink-soft); font-size: 0.76rem; font-weight: 750; padding: 5px 9px; }

.work-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 42px; }

.work-card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 24px;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.work-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.work-card.featured { grid-column: span 2; background: var(--surface-strong); color: var(--bg); }
.work-card.featured p, .work-card.featured .work-meta, .work-card.featured .tag { color: #c6d5d0; }
.work-card.featured .tag { border-color: #486761; background: #1a3838; }
.work-card.featured .work-link { color: var(--warm); }
.work-card h3 { font-size: 1.35rem; }
.work-meta { display: flex; justify-content: space-between; gap: 14px; color: var(--ink-muted); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }
.work-card p { margin-top: 14px; color: var(--ink-soft); }
.work-highlights { display: grid; gap: 6px; margin-top: 18px; padding: 0; color: var(--ink-soft); font-size: 0.9rem; list-style: none; }
.work-highlights li { position: relative; padding-left: 16px; }
.work-highlights li::before { content: ""; position: absolute; left: 0; top: 0.67em; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }
.work-links { display: flex; flex-wrap: wrap; gap: 14px; margin-top: auto; padding-top: 24px; }
.work-link { color: var(--accent); font-size: 0.84rem; font-weight: 850; }
.work-link:hover { color: var(--accent-hover); text-decoration: underline; text-underline-offset: 4px; }

.expertise-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1px; margin-top: 42px; border: 1px solid var(--border); background: var(--border); }

.expertise-group { min-height: 230px; background: var(--surface); padding: 24px 20px; }
.expertise-group h3 { color: var(--accent); font-size: 0.9rem; }
.expertise-group ul { display: grid; gap: 9px; margin-top: 18px; padding: 0; color: var(--ink-soft); font-size: 0.9rem; list-style: none; }
.expertise-group li { position: relative; padding-left: 15px; }
.expertise-group li::before { content: ""; position: absolute; left: 0; top: 0.7em; width: 4px; height: 4px; border-radius: 50%; background: var(--warm); }

.feature-grid { display: grid; grid-template-columns: minmax(0, 0.84fr) minmax(0, 1.16fr); gap: 56px; align-items: center; margin-top: 42px; }
.feature-copy h3 { font-size: 1.75rem; }
.feature-copy p { margin-top: 14px; color: #c6d5d0; }
.feature-copy .tag-list { margin-top: 24px; }
.feature-media { overflow: hidden; border: 1px solid #385255; border-radius: 10px; background: #1a2d31; }
.feature-media img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top left; }

.writing-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 42px; }
.writing-card { display: flex; flex-direction: column; min-height: 220px; border-top: 2px solid var(--accent); background: var(--surface); padding: 22px; }
.writing-card .writing-type { color: var(--accent); font-size: 0.75rem; font-weight: 850; letter-spacing: 0.09em; text-transform: uppercase; }
.writing-card h3 { margin-top: 18px; font-size: 1.2rem; }
.writing-card p { margin-top: 12px; color: var(--ink-soft); }
.writing-card a { margin-top: auto; padding-top: 22px; color: var(--accent); font-size: 0.86rem; font-weight: 850; }

.lab-callout { display: flex; align-items: center; justify-content: space-between; gap: 28px; margin-top: 28px; border-top: 1px solid var(--border); padding-top: 28px; }
.lab-callout h3 { font-size: 1.3rem; }
.lab-callout p { margin-top: 6px; color: var(--ink-soft); }

.education-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) repeat(2, minmax(0, 0.9fr)); gap: 16px; margin-top: 42px; }
.education-item { border: 1px solid var(--border); background: var(--surface); padding: 24px; }
.education-item h3 { font-size: 1.22rem; }
.education-item p { margin-top: 9px; color: var(--ink-soft); }
.education-item .education-meta { color: var(--accent); font-size: 0.8rem; font-weight: 850; }
.proof-line { margin-top: 18px; color: var(--ink); font-size: 1rem; font-weight: 850; }

.cta {
  border-top: 1px solid var(--border);
  background: var(--surface-muted);
}

.cta-grid { display: flex; align-items: end; justify-content: space-between; gap: 40px; }
.cta-grid h2 { max-width: 680px; }
.cta-grid .lead { max-width: 660px; }
.cta-actions { flex: 0 0 auto; }

.site-footer { border-top: 1px solid var(--border); padding: 30px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-inner p { color: var(--ink-muted); font-size: 0.82rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; color: var(--ink-soft); font-size: 0.82rem; font-weight: 750; }
.footer-links a:hover { color: var(--accent); }

.page-hero { padding: 78px 0 72px; border-bottom: 1px solid var(--border); }
.page-hero h1 { max-width: 900px; font-size: clamp(2.8rem, 6vw, 5.6rem); }
.page-hero .lead { max-width: 760px; }
.page-actions { margin-top: 28px; }

.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.filter-button { border: 1px solid var(--border); border-radius: 999px; background: var(--surface); color: var(--ink-soft); cursor: pointer; font-size: 0.82rem; font-weight: 800; padding: 8px 12px; }
.filter-button:hover, .filter-button.active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.filter-empty { display: none; margin-top: 24px; color: var(--ink-muted); }

.project-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 34px; }
.project-list .work-card { min-height: 300px; }

.article-hero { padding: 74px 0 56px; border-bottom: 1px solid var(--border); }
.article-hero h1 { max-width: 880px; font-size: clamp(2.6rem, 6vw, 5.6rem); }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 20px; color: var(--ink-muted); font-size: 0.84rem; font-weight: 750; }
.case-layout { display: grid; grid-template-columns: minmax(0, 1.16fr) minmax(240px, 0.84fr); gap: 56px; align-items: start; }
.prose { max-width: 780px; }
.prose h2 { margin-top: 48px; font-size: 2rem; }
.prose h3 { margin-top: 28px; font-size: 1.3rem; }
.prose p { margin-top: 16px; color: var(--ink-soft); }
.prose ul { display: grid; gap: 9px; margin-top: 16px; padding-left: 20px; color: var(--ink-soft); }
.prose li::marker { color: var(--accent); }
.prose img { margin-top: 24px; border: 1px solid var(--border); border-radius: 8px; }
.side-panel { position: sticky; top: calc(var(--nav-height) + 24px); border-top: 2px solid var(--accent); background: var(--surface-muted); padding: 22px; }
.side-panel h3 { color: var(--accent); font-size: 0.9rem; }
.side-panel dl { display: grid; gap: 16px; margin-top: 18px; }
.side-panel dt { color: var(--ink-muted); font-size: 0.73rem; font-weight: 850; letter-spacing: 0.08em; text-transform: uppercase; }
.side-panel dd { margin-top: 4px; color: var(--ink-soft); font-size: 0.9rem; font-weight: 700; }
.gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 28px; }
.gallery figure { margin: 0; border: 1px solid var(--border); background: var(--surface); }
.gallery img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top left; }
.gallery figcaption { padding: 12px 14px; color: var(--ink-soft); font-size: 0.84rem; }
.status-note { margin-top: 24px; border-left: 3px solid var(--warm); background: var(--warm-soft); color: var(--ink-soft); padding: 14px 16px; }
.status-note strong { color: var(--ink); }

.notes-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 42px; }
.notes-list .writing-card { min-height: 260px; }

.resume-box { display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: center; border: 1px solid var(--border); background: var(--surface); padding: 30px; }
.resume-box h2 { font-size: 2rem; }
.resume-box p { max-width: 690px; margin-top: 12px; color: var(--ink-soft); }

.not-found { min-height: 70vh; display: grid; place-items: center; text-align: center; }
.not-found h1 { font-size: clamp(4rem, 14vw, 9rem); }
.not-found p { margin-top: 16px; color: var(--ink-soft); }
.not-found .button-row { justify-content: center; margin-top: 26px; }

.reveal { animation: rise-in 500ms ease both; }
@keyframes rise-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 1080px) {
  .nav-links { gap: 0; }
  .nav-actions .nav-quiet { display: none; }
  .expertise-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .education-grid { grid-template-columns: 1fr 1fr; }
  .education-item:first-child { grid-column: 1 / -1; }
}

@media (max-width: 820px) {
  :root { --nav-height: 68px; }
  .container { width: min(var(--max), calc(100% - 32px)); }
  .section { padding: 76px 0; }
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    inset: var(--nav-height) 16px auto;
    display: none;
    align-items: stretch;
    flex-direction: column;
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow-lg);
    padding: 8px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { justify-content: flex-start; padding: 12px; }
  .nav-actions { margin-left: 0; }
  .nav-actions .nav-quiet { display: none; }
  .hero { padding: 54px 0 70px; }
  .hero-grid, .about-grid, .feature-grid, .case-layout { grid-template-columns: 1fr; gap: 38px; }
  .portrait-wrap { width: min(360px, 82vw); margin-inline: auto; }
  .portrait-caption { right: -12px; }
  .metric-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric-item:nth-child(2) { border-right: 0; }
  .metric-item:nth-child(-n + 2) { border-bottom: 1px solid var(--border); }
  .work-grid, .writing-grid, .notes-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .work-card.featured { grid-column: 1 / -1; }
  .expertise-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cta-grid { display: grid; grid-template-columns: 1fr; gap: 24px; align-items: start; }
  .side-panel { position: static; }
  .project-list { grid-template-columns: 1fr; }
  .resume-box { grid-template-columns: 1fr; }
}

@media (max-width: 540px) {
  h1 { font-size: clamp(2.9rem, 15vw, 4.6rem); }
  h2 { font-size: 2.45rem; }
  .brand-role { display: none; }
  .nav-actions { gap: 0; }
  .nav-actions .theme-toggle { padding-inline: 8px; }
  .hero { padding-top: 42px; }
  .hero-statement { font-size: 1.3rem; }
  .button-row .button { width: 100%; }
  .hero-socials { gap: 14px; }
  .metric-item { min-height: 112px; padding: 20px 16px; }
  .signal-list div { grid-template-columns: 1fr; gap: 5px; }
  .timeline-item { grid-template-columns: 1fr; gap: 10px; padding-left: 32px; }
  .timeline::before { left: 7px; }
  .timeline-item::before { left: 2px; }
  .work-grid, .writing-grid, .notes-list, .education-grid, .expertise-grid, .gallery { grid-template-columns: 1fr; }
  .education-item:first-child { grid-column: auto; }
  .work-card.featured { grid-column: auto; }
  .lab-callout { align-items: flex-start; flex-direction: column; }
  .resume-box, .side-panel { padding: 20px; }
  .article-hero, .page-hero { padding: 52px 0 46px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}