/* ---------- Design tokens ---------- */
:root {
  --paper: #f2efe6;
  --paper-deep: #e7e2d6;
  --ink: #171916;
  --ink-soft: #53574f;
  --ink-faint: #696d65;
  --line: #cbc7bb;
  --line-dark: #343b36;
  --forest: #17211d;
  --forest-soft: #22332c;
  --rust: #b4472f;
  --rust-dark: #843420;
  --signal: #91d6b8;
  --white: #fffefa;

  --font-display: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
  --font-body: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4.5rem;
  --space-8: 7rem;
  --shell: 76rem;
  --header-height: 4.5rem;
}

/* ---------- Reset and base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
}

body {
  margin: 0;
  min-width: 20rem;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(23, 25, 22, 0.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 25, 22, 0.026) 1px, transparent 1px);
  background-size: 3rem 3rem;
  content: "";
  pointer-events: none;
}

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

button,
input,
textarea,
select {
  font: inherit;
}

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

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

p,
h1,
h2,
h3,
h4,
figure,
dl,
dd,
ul {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

[hidden] {
  display: none !important;
}

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

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 1000;
  padding: 0.65rem 1rem;
  transform: translateY(-150%);
  background: var(--ink);
  color: var(--white);
  font-weight: 700;
  transition: transform 160ms ease;
}

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

.shell {
  width: min(calc(100% - 3rem), var(--shell));
  margin-inline: auto;
}

.section-index,
.kicker,
.project-meta,
.project-stack,
.system-map,
.model-figure,
.pipeline-figure,
.archive-row__area,
.archive-row__stack,
.inline-status,
.availability {
  font-family: var(--font-mono);
}

.section-index,
.kicker {
  color: var(--rust-dark);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-transform: uppercase;
}

.section-intro {
  margin-bottom: var(--space-7);
}

.section-intro--split {
  display: grid;
  grid-template-columns: minmax(10rem, 0.8fr) minmax(0, 1.7fr);
  gap: var(--space-6);
  align-items: start;
}

.section-intro h2,
.about-copy h2,
.contact-section h2 {
  font-family: var(--font-display);
  font-size: clamp(2.7rem, 5.5vw, 5.8rem);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 0.96;
}

.section-intro > div > p {
  max-width: 39rem;
  margin-top: var(--space-4);
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: rgba(242, 239, 230, 0.96);
}

@supports (backdrop-filter: blur(8px)) {
  .site-header {
    background: rgba(242, 239, 230, 0.88);
    backdrop-filter: blur(8px);
  }
}

.nav {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  height: 100%;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  align-self: stretch;
  gap: 0.2rem;
  border-right: 1px solid var(--line);
  padding-right: var(--space-5);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  text-decoration: none;
}

.wordmark span {
  color: var(--rust);
}

.nav-menu {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-width: 0;
}

.nav-links {
  display: flex;
  gap: clamp(1.3rem, 3vw, 2.6rem);
  padding: 0 0 0 var(--space-5);
  list-style: none;
}

.nav-links a,
.nav-external a {
  position: relative;
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.035em;
  text-decoration: none;
}

.nav-links a::after {
  position: absolute;
  right: 0;
  bottom: -0.55rem;
  left: 0;
  height: 2px;
  transform: scaleX(0);
  background: var(--rust);
  content: "";
  transform-origin: left;
  transition: transform 180ms ease;
}

.nav-links a:hover,
.nav-links a.is-current,
.nav-external a:hover {
  color: var(--ink);
}

.nav-links a:hover::after,
.nav-links a.is-current::after {
  transform: scaleX(1);
}

.nav-external {
  display: flex;
  align-items: center;
  align-self: stretch;
  gap: var(--space-4);
  border-left: 1px solid var(--line);
  padding-left: var(--space-5);
}

.nav-toggle {
  display: none;
}

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(24rem, 0.95fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
  min-height: calc(100svh - var(--header-height));
  padding-block: clamp(5rem, 9vw, 8.5rem);
}

.hero-copy {
  max-width: 44rem;
}

.hero h1 {
  max-width: 13ch;
  margin-top: var(--space-4);
  font-family: var(--font-display);
  font-size: clamp(3.7rem, 7.4vw, 7.25rem);
  font-weight: 400;
  letter-spacing: -0.06em;
  line-height: 0.88;
}

.hero h1 em {
  color: var(--rust);
  font-weight: 400;
}

.hero-lede {
  max-width: 43rem;
  margin-top: var(--space-5);
  color: var(--ink-soft);
  font-size: clamp(1.04rem, 1.5vw, 1.2rem);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  margin-top: var(--space-5);
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 3rem;
  padding: 0.8rem 1.25rem;
  border: 1px solid transparent;
  font-size: 0.86rem;
  font-weight: 800;
  text-decoration: none;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

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

.button--primary:hover {
  transform: translateY(-2px);
  background: var(--rust-dark);
}

.text-link,
.project-link {
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 800;
  text-decoration-color: var(--rust);
  transition: color 160ms ease;
}

.text-link:hover,
.project-link:hover {
  color: var(--rust-dark);
}

.availability {
  display: flex;
  gap: 0.7rem;
  align-items: center;
  margin-top: var(--space-5);
  color: var(--ink-faint);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.availability > span {
  width: 0.48rem;
  height: 0.48rem;
  border-radius: 50%;
  background: var(--rust);
}

.system-map {
  border: 1px solid var(--line-dark);
  background: var(--forest);
  color: #e9ede7;
}

.system-map figcaption,
.system-map__footer {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 0.85rem 1rem;
  color: #aebbb3;
  font-size: 0.63rem;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.system-map figcaption {
  border-bottom: 1px solid var(--line-dark);
}

.system-map figcaption span:first-child {
  color: var(--signal);
}

.signal-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  padding: var(--space-4);
}

.signal-node {
  min-width: 0;
  border: 1px solid #3d4a43;
  padding: 1rem;
  background: #1c2923;
}

.signal-node span,
.signal-node small {
  display: block;
}

.signal-node span {
  color: #7f9187;
  font-size: 0.58rem;
  letter-spacing: 0.06em;
}

.signal-node strong {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
}

.signal-node small {
  margin-top: 0.15rem;
  overflow-wrap: anywhere;
  color: #9caaa2;
  font-size: 0.61rem;
}

.signal-arrow {
  align-self: center;
  padding-inline: 0.55rem;
  color: var(--rust);
}

.signal-node:nth-child(3) {
  grid-column: 3;
  grid-row: 1;
}

.signal-node:nth-child(5) {
  grid-column: 3;
  grid-row: 3;
}

.signal-node:nth-child(7) {
  grid-column: 1;
  grid-row: 3;
}

.signal-arrow:nth-child(4) {
  grid-column: 3;
  grid-row: 2;
  justify-self: center;
  transform: rotate(90deg);
}

.signal-arrow:nth-child(6) {
  grid-column: 2;
  grid-row: 3;
  transform: rotate(180deg);
}

.system-map__footer {
  border-top: 1px solid var(--line-dark);
}

/* ---------- Selected work ---------- */
.work-section {
  border-top: 1px solid var(--line);
  padding-block: var(--space-8);
}

.feature {
  display: grid;
  grid-template-columns: minmax(20rem, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  border-top: 1px solid var(--ink);
  padding-block: clamp(3rem, 7vw, 6rem);
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  margin-bottom: var(--space-4);
  color: var(--rust-dark);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.project-meta span:last-child {
  color: var(--ink-faint);
}

.project-meta .project-status {
  color: var(--rust-dark);
}

.feature h3,
.support-project h3,
.archive h3,
.experience-item h3 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1;
}

.feature h3 {
  font-size: clamp(2.4rem, 4.4vw, 4.8rem);
}

.project-problem {
  margin-block: var(--space-4) var(--space-3);
  color: var(--ink);
  font-size: 1.08rem;
  font-weight: 750;
}

.feature-copy > p:not(.project-problem, .project-stack) {
  color: var(--ink-soft);
}

.decision-list {
  margin-top: var(--space-5);
  border-top: 1px solid var(--line);
}

.decision-list > div {
  display: grid;
  grid-template-columns: 5rem 1fr;
  gap: var(--space-3);
  border-bottom: 1px solid var(--line);
  padding-block: 0.8rem;
}

.decision-list dt {
  color: var(--rust-dark);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.decision-list dd {
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.55;
}

.project-stack {
  margin-block: var(--space-4) var(--space-3);
  color: var(--ink-faint);
  font-size: 0.7rem;
  line-height: 1.7;
}

.project-figure {
  min-width: 0;
}

.project-figure--dashboard {
  padding: clamp(0.6rem, 1.4vw, 1rem);
  border: 1px solid var(--line-dark);
  background: var(--forest);
}

.project-figure img {
  width: 100%;
  height: auto;
  border: 1px solid #314038;
}

.project-figure figcaption {
  padding: 0.75rem 0 0.1rem;
  color: #9ca9a1;
  font-family: var(--font-mono);
  font-size: 0.61rem;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.feature--catchup {
  grid-template-columns: minmax(0, 1.15fr) minmax(20rem, 0.85fr);
}

.catchup-preview {
  min-width: 0;
  border: 1px solid #c0bbb0;
  background: #e7e0d3;
  box-shadow: 0.9rem 0.9rem 0 var(--rust);
}

.catchup-preview__bar {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  border-bottom: 1px solid #b6b0a4;
  padding: 0.85rem 1rem;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.status-dot::before {
  display: inline-block;
  width: 0.42rem;
  height: 0.42rem;
  margin-right: 0.45rem;
  border-radius: 50%;
  background: var(--rust);
  content: "";
}

.catchup-preview__body {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(11rem, 0.6fr);
  min-height: 28rem;
}

.chat-column {
  padding: clamp(1.25rem, 3vw, 2.5rem);
}

.chat-day {
  margin-bottom: var(--space-5);
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  text-align: center;
}

.chat-message {
  display: grid;
  grid-template-columns: 2.3rem 1fr;
  gap: 0.8rem;
  align-items: start;
  margin-bottom: var(--space-5);
}

.avatar {
  display: grid;
  place-items: center;
  width: 2.3rem;
  height: 2.3rem;
  background: var(--forest);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 0.58rem;
}

.avatar--alt {
  background: var(--rust);
}

.chat-message p {
  padding: 0.8rem 1rem;
  border: 1px solid #c5beb2;
  background: #f5f0e7;
  color: #343832;
  font-size: 0.82rem;
  line-height: 1.5;
}

.chat-message strong {
  display: block;
  margin-bottom: 0.15rem;
  font-size: 0.7rem;
}

.chat-message--muted {
  opacity: 0.72;
}

.important-panel {
  border-left: 1px solid #b6b0a4;
  padding: clamp(1.25rem, 2.5vw, 2rem);
  background: #d9d3c7;
}

.important-panel__label {
  display: block;
  color: var(--rust-dark);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.important-panel > strong {
  display: block;
  margin-top: var(--space-5);
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 400;
  line-height: 1;
}

.important-panel > p {
  margin-top: var(--space-3);
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.important-panel dl {
  margin-top: var(--space-5);
  border-top: 1px solid #b6b0a4;
}

.important-panel dl > div {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  border-bottom: 1px solid #b6b0a4;
  padding-block: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  text-transform: uppercase;
}

.important-panel dd {
  color: var(--rust-dark);
}

.project-notes {
  margin-top: var(--space-4);
  padding-left: 1.15rem;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.project-notes li + li {
  margin-top: 0.55rem;
}

/* ---------- Supporting work ---------- */
.supporting-work {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.support-project {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-width: 0;
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
}

.support-project:first-child {
  padding-right: clamp(2rem, 5vw, 4rem);
}

.support-project:last-child {
  border-left: 1px solid var(--line);
  padding-left: clamp(2rem, 5vw, 4rem);
}

.support-project h3 {
  max-width: 12ch;
  font-size: clamp(2rem, 3.5vw, 3.4rem);
}

.support-project__copy > p:not(.project-stack) {
  margin-top: var(--space-4);
  color: var(--ink-soft);
}

.model-figure,
.pipeline-figure {
  margin-top: var(--space-6);
  border: 1px solid var(--line);
  padding: clamp(1.1rem, 2vw, 1.7rem);
  background: rgba(255, 254, 250, 0.42);
}

.model-figure figcaption,
.pipeline-figure figcaption {
  margin-bottom: var(--space-4);
  color: var(--ink-faint);
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.model-row {
  display: grid;
  grid-template-columns: minmax(6.6rem, 1fr) minmax(5rem, 1.3fr) auto;
  gap: var(--space-3);
  align-items: center;
  border-top: 1px solid var(--line);
  padding-block: 0.85rem;
  font-size: 0.67rem;
}

.model-track {
  height: 0.42rem;
  background: #d7d2c7;
}

.model-track i {
  display: block;
  width: var(--score);
  height: 100%;
  background: var(--ink-faint);
}

.model-row--best {
  color: var(--rust-dark);
}

.model-row--best .model-track i {
  background: var(--rust);
}

.model-row strong {
  font-size: 0.67rem;
}

.model-figure > p {
  margin-top: var(--space-3);
  color: var(--ink-faint);
  font-family: var(--font-body);
  font-size: 0.7rem;
}

.pipeline-stage {
  display: grid;
  grid-template-columns: 2.3rem 1fr;
  border: 1px solid var(--line);
  padding: 0.75rem;
}

.pipeline-stage span {
  grid-row: span 2;
  color: var(--rust-dark);
  font-size: 0.61rem;
}

.pipeline-stage strong {
  font-family: var(--font-body);
  font-size: 0.83rem;
}

.pipeline-stage small {
  color: var(--ink-faint);
  font-size: 0.58rem;
}

.pipeline-line {
  width: 1px;
  height: 1rem;
  margin-left: 1.9rem;
  background: var(--rust);
}

/* ---------- Archive ---------- */
.archive {
  padding-top: var(--space-8);
}

.archive-head {
  display: flex;
  justify-content: space-between;
  gap: var(--space-5);
  align-items: end;
  margin-bottom: var(--space-5);
}

.archive h3 {
  margin-top: 0.75rem;
  font-size: clamp(2.2rem, 4vw, 4rem);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.filter {
  min-height: 2.4rem;
  border: 1px solid var(--line);
  padding: 0.55rem 0.85rem;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 750;
  transition: background 150ms ease, border-color 150ms ease, color 150ms ease;
}

.filter:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.filter.is-active {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--white);
}

.archive-list {
  border-top: 1px solid var(--ink);
}

.archive-row {
  display: grid;
  grid-template-columns: 9rem minmax(15rem, 1.5fr) minmax(12rem, 0.7fr) 2.4rem;
  gap: var(--space-4);
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding-block: 1.35rem;
}

.archive-row__area,
.archive-row__stack {
  color: var(--ink-faint);
  font-size: 0.62rem;
  line-height: 1.5;
}

.archive-row h4 {
  font-size: 0.95rem;
  line-height: 1.35;
}

.archive-row div > p {
  margin-top: 0.25rem;
  color: var(--ink-soft);
  font-size: 0.79rem;
  line-height: 1.5;
}

.archive-row > a {
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border: 1px solid var(--line);
  text-decoration: none;
  transition: background 150ms ease, color 150ms ease, transform 150ms ease;
}

.archive-row > a:hover {
  transform: translate(2px, -2px);
  background: var(--rust);
  color: var(--white);
}

.inline-status {
  display: inline-block;
  margin-top: 0.45rem;
  color: var(--rust-dark);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ---------- Experience ---------- */
.experience-section {
  padding-block: var(--space-8);
}

.experience-list {
  border-top: 1px solid var(--ink);
}

.experience-item {
  display: grid;
  grid-template-columns: minmax(16rem, 0.8fr) minmax(0, 1.3fr);
  gap: var(--space-6);
  border-bottom: 1px solid var(--line);
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
}

.experience-item__org > p {
  margin-bottom: var(--space-3);
  color: var(--rust-dark);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.experience-item h3 {
  max-width: 12ch;
  font-size: clamp(2rem, 3.2vw, 3.4rem);
}

.experience-item__body {
  max-width: 44rem;
  color: var(--ink-soft);
  font-size: 1rem;
}

.experience-item__body p + p {
  margin-top: var(--space-3);
}

/* ---------- About and skills ---------- */
.about-section {
  border-block: 1px solid var(--line-dark);
  padding-block: var(--space-8);
  background: var(--forest);
  color: #e9ede7;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(24rem, 0.95fr);
  gap: clamp(3rem, 9vw, 9rem);
}

.about-copy .section-index {
  color: var(--signal);
}

.about-copy h2 {
  margin-top: var(--space-4);
}

.about-copy > p:not(.section-index, .coursework) {
  max-width: 44rem;
  margin-top: var(--space-5);
  color: #bac5be;
}

.coursework {
  margin-top: var(--space-6);
  border-top: 1px solid var(--line-dark);
  padding-top: var(--space-4);
  color: #98a79f;
  font-size: 0.82rem;
  line-height: 1.7;
}

.coursework span {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.focus-list {
  border-top: 1px solid var(--line-dark);
}

.focus-row {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: var(--space-3);
  border-bottom: 1px solid var(--line-dark);
  padding-block: var(--space-5);
}

.focus-row > span {
  color: var(--rust);
  font-family: var(--font-mono);
  font-size: 0.63rem;
}

.focus-row h3 {
  font-size: 1rem;
}

.focus-row p {
  margin-top: 0.55rem;
  color: #9eaca4;
  font-size: 0.84rem;
}

.skills {
  display: grid;
  grid-template-columns: minmax(12rem, 0.55fr) minmax(0, 1.45fr);
  gap: var(--space-6);
  margin-top: var(--space-8);
  border-top: 1px solid var(--line-dark);
  padding-top: var(--space-6);
}

.skills > h3 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 3.3rem);
  font-weight: 400;
}

.skills-list > div {
  display: grid;
  grid-template-columns: minmax(10rem, 0.5fr) minmax(0, 1fr);
  gap: var(--space-4);
  border-bottom: 1px solid var(--line-dark);
  padding-block: 1.1rem;
}

.skills-list > div:first-child {
  padding-top: 0;
}

.skills-list dt {
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 700;
  text-transform: uppercase;
}

.skills-list dd {
  color: #b5c0b9;
  font-size: 0.83rem;
}

/* ---------- Contact and footer ---------- */
.contact-section {
  padding-block: var(--space-8);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(20rem, 0.75fr);
  gap: clamp(3rem, 9vw, 9rem);
  align-items: end;
}

.contact-section h2 {
  max-width: 12ch;
  margin-top: var(--space-4);
}

.contact-copy > p {
  max-width: 31rem;
  color: var(--ink-soft);
}

.contact-email {
  display: inline-block;
  margin-top: var(--space-5);
  color: var(--rust-dark);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.2vw, 2rem);
  text-decoration-thickness: 1px;
}

.contact-links {
  display: flex;
  gap: var(--space-5);
  margin-top: var(--space-5);
  border-top: 1px solid var(--line);
  padding-top: var(--space-4);
}

.contact-links a {
  font-size: 0.78rem;
  font-weight: 800;
}

.site-footer {
  border-top: 1px solid var(--ink);
  padding-block: var(--space-4);
}

.site-footer .shell {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.61rem;
  letter-spacing: 0.03em;
}

/* ---------- Progressive reveal ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity 520ms ease, transform 520ms ease;
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 68rem) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(21rem, 0.78fr);
    gap: var(--space-6);
  }

  .feature,
  .feature--catchup {
    grid-template-columns: minmax(18rem, 0.8fr) minmax(0, 1.2fr);
    gap: var(--space-6);
  }

  .feature--catchup .feature-copy {
    order: -1;
  }

  .archive-row {
    grid-template-columns: 7rem minmax(13rem, 1.4fr) minmax(10rem, 0.7fr) 2.4rem;
  }
}

@media (max-width: 56rem) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-copy {
    max-width: 49rem;
  }

  .system-map {
    width: min(100%, 44rem);
  }

  .section-intro--split,
  .feature,
  .feature--catchup,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .section-intro--split {
    gap: var(--space-4);
  }

  .feature--catchup .feature-copy {
    order: initial;
  }

  .feature-copy {
    max-width: 44rem;
  }

  .supporting-work {
    grid-template-columns: 1fr;
  }

  .support-project:first-child,
  .support-project:last-child {
    padding-inline: 0;
  }

  .support-project:last-child {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .support-project__copy {
    max-width: 44rem;
  }

  .archive-row {
    grid-template-columns: 7rem minmax(0, 1fr) 2.4rem;
  }

  .archive-row__stack {
    display: none;
  }

  .experience-item {
    grid-template-columns: minmax(13rem, 0.7fr) minmax(0, 1.3fr);
    gap: var(--space-5);
  }

  .contact-grid {
    align-items: start;
  }
}

@media (max-width: 47.5rem) {
  :root {
    --header-height: 4rem;
    --space-8: 5rem;
  }

  .shell {
    width: min(calc(100% - 2rem), var(--shell));
  }

  .site-header {
    background: var(--paper);
  }

  .nav {
    grid-template-columns: auto auto;
    justify-content: space-between;
  }

  .wordmark {
    padding-right: var(--space-4);
  }

  .nav-toggle {
    display: inline-flex;
    gap: 0.7rem;
    align-items: center;
    border: 0;
    padding: 0.65rem 0;
    background: transparent;
    color: var(--ink);
    cursor: pointer;
    font-size: 0.76rem;
    font-weight: 750;
  }

  .nav-toggle__lines {
    display: grid;
    gap: 0.3rem;
    width: 1.1rem;
  }

  .nav-toggle__lines i {
    display: block;
    height: 1px;
    background: currentColor;
    transition: transform 160ms ease;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__lines i:first-child {
    transform: translateY(0.2rem) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__lines i:last-child {
    transform: translateY(-0.2rem) rotate(-45deg);
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    right: 0;
    left: 0;
    display: block;
    visibility: hidden;
    max-height: calc(100svh - var(--header-height));
    overflow-y: auto;
    border-bottom: 1px solid var(--ink);
    padding: 0 1rem 1.5rem;
    transform: translateY(-0.75rem);
    background: var(--paper);
    opacity: 0;
    transition: opacity 160ms ease, transform 160ms ease, visibility 160ms;
  }

  .nav-menu.is-open {
    visibility: visible;
    transform: none;
    opacity: 1;
  }

  .menu-open {
    overflow: hidden;
  }

  .nav-links {
    display: block;
    padding: 0;
  }

  .nav-links li {
    border-bottom: 1px solid var(--line);
  }

  .nav-links a {
    display: block;
    padding-block: 1rem;
    font-size: 1rem;
  }

  .nav-links a::after {
    display: none;
  }

  .nav-external {
    align-self: auto;
    margin-top: var(--space-4);
    border-left: 0;
    padding-left: 0;
  }

  .hero {
    gap: var(--space-6);
    padding-block: 4rem;
  }

  .hero h1 {
    font-size: clamp(3.2rem, 16vw, 5.3rem);
  }

  .signal-flow {
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }

  .signal-node,
  .signal-node:nth-child(3),
  .signal-node:nth-child(5),
  .signal-node:nth-child(7) {
    grid-column: 1;
    grid-row: auto;
  }

  .signal-arrow,
  .signal-arrow:nth-child(4),
  .signal-arrow:nth-child(6) {
    display: none;
  }

  .system-map__footer {
    flex-direction: column;
  }

  .feature {
    padding-block: var(--space-6);
  }

  .catchup-preview {
    box-shadow: 0.45rem 0.45rem 0 var(--rust);
  }

  .catchup-preview__body {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .important-panel {
    border-top: 1px solid #b6b0a4;
    border-left: 0;
  }

  .archive-head {
    display: block;
  }

  .filters {
    margin-top: var(--space-5);
  }

  .archive-row {
    grid-template-columns: 1fr 2.4rem;
    gap: var(--space-3);
  }

  .archive-row__area {
    grid-column: 1 / -1;
  }

  .archive-row > div {
    grid-column: 1;
  }

  .archive-row > a {
    grid-column: 2;
    align-self: end;
  }

  .experience-item {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .skills {
    grid-template-columns: 1fr;
  }

  .skills-list > div {
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }

  .site-footer .shell {
    display: block;
  }

  .site-footer p + p {
    margin-top: 0.45rem;
  }
}

@media (max-width: 30rem) {
  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .system-map figcaption {
    flex-direction: column;
  }

  .model-row {
    grid-template-columns: minmax(6rem, 1fr) minmax(4rem, 0.7fr) auto;
    gap: 0.55rem;
  }

  .filters {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

@media print {
  .site-header,
  .hero-actions,
  .filters,
  .site-footer {
    display: none;
  }

  body {
    background: #fff;
  }

  body::before {
    display: none;
  }

  .hero {
    min-height: auto;
  }
}