:root {
  color-scheme: light;

  /* Portfolio design tokens: Carbon-inspired neutral scale, USWDS-inspired clarity states. */
  --color-page: #f8f8f5;
  --color-surface: #ffffff;
  --color-surface-alt: #f0f4f3;
  --color-ink: #111820;
  --color-text: #27313a;
  --color-muted: #596874;
  --color-border: #cfd7d8;
  --color-border-strong: #89979c;
  --color-action: #005ea8;
  --color-action-hover: #003e73;
  --color-accent: #0b6f6a;
  --color-accent-soft: #dceceb;
  --color-warning: #8a4b00;
  --color-error: #b50909;
  --color-success: #2e7044;
  --color-focus: #6b4eff;

  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --text-xs: 0.8125rem;
  --text-sm: 0.9375rem;
  --text-md: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: clamp(1.75rem, 3vw, 2.5rem);
  --text-3xl: clamp(2.25rem, 5vw, 4rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;

  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --measure: 72ch;
  --site-width: 1180px;
  --page-gutter: clamp(1rem, 4vw, 3rem);
  --shadow-subtle: 0 0.5rem 1.5rem rgba(17, 24, 32, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  background: var(--color-page);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: 1.65;
}

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

img {
  height: auto;
}

a {
  color: var(--color-action);
  text-decoration-line: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-action-hover);
  text-decoration-thickness: 0.14em;
}

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

h1,
h2,
h3,
p {
  margin-block-start: 0;
}

h1,
h2,
h3 {
  color: var(--color-ink);
  line-height: 1.15;
}

h1 {
  max-width: 14ch;
  margin-block-end: var(--space-4);
  font-size: var(--text-3xl);
}

.hero h1 {
  max-width: 18ch;
}

h2 {
  max-width: 20ch;
  margin-block-end: var(--space-4);
  font-size: var(--text-2xl);
}

h3 {
  margin-block-end: var(--space-2);
  font-size: var(--text-xl);
}

p {
  margin-block-end: var(--space-4);
}

ul,
ol {
  padding-inline-start: 1.25rem;
}

li + li {
  margin-block-start: var(--space-2);
}

code {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.05rem 0.25rem;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: var(--space-4);
  z-index: 10;
  padding: var(--space-3) var(--space-4);
  background: var(--color-ink);
  color: #ffffff;
  font-weight: 700;
  transform: translateY(-160%);
}

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

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: rgba(248, 248, 245, 0.96);
}

.header-inner,
.section-inner,
.footer-inner {
  width: min(var(--site-width), calc(100% - (var(--page-gutter) * 2)));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding-block: var(--space-4);
}

.brand {
  color: var(--color-ink);
  font-weight: 800;
  text-decoration: none;
}

.site-nav ul {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--space-1) var(--space-3);
  align-items: baseline;
  justify-content: flex-end;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav li {
  display: flex;
  align-items: center;
  align-self: baseline;
}

.site-nav a {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: var(--space-1) var(--space-2);
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-action-hover);
  text-decoration: none;
}

.site-nav a::after {
  position: absolute;
  inset-inline: var(--space-2);
  inset-block-end: 0;
  height: 0.1875rem;
  background: transparent;
  content: "";
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  background: var(--color-action);
}

main {
  min-height: 64vh;
}

.hero,
.page-hero,
.content-section {
  padding-block: clamp(3rem, 7vw, 6rem);
}

.hero {
  border-block-end: 1px solid var(--color-border);
  background: var(--color-surface-alt);
}

.page-hero {
  border-block-end: 1px solid var(--color-border);
  background: var(--color-surface);
}

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

.section-kicker,
.eyebrow {
  margin-block-end: var(--space-3);
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.lede {
  max-width: var(--measure);
  color: var(--color-muted);
  font-size: var(--text-lg);
}

.hero .lede {
  max-width: 60ch;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 26rem);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: center;
}

.system-map {
  border-inline-start: 0.45rem solid var(--color-accent);
  padding: var(--space-5);
  background: var(--color-surface);
}

.system-map h2 {
  max-width: none;
  margin-block-end: var(--space-4);
  font-size: var(--text-lg);
}

.system-map dl {
  display: grid;
  gap: var(--space-3);
  margin: 0;
}

.system-map dt {
  color: var(--color-ink);
  font-weight: 800;
}

.system-map dd {
  margin: 0;
  color: var(--color-muted);
}

.compact-copy {
  max-width: 58ch;
}

.theme-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0;
  list-style: none;
}

.theme-list li {
  margin: 0;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 700;
}

.action-row,
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-block-start: var(--space-5);
}

.button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-action);
  border-radius: var(--radius-sm);
  padding: 0.62rem 1rem;
  background: var(--color-action);
  color: #ffffff;
  font-weight: 800;
  text-decoration: none;
}

.button:hover,
.button:focus-visible {
  border-color: var(--color-action-hover);
  background: var(--color-action-hover);
  color: #ffffff;
}

.button.secondary {
  background: transparent;
  color: var(--color-action);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  background: var(--color-action-hover);
  color: #ffffff;
}

.grid,
.summary-grid,
.work-grid,
.resume-grid,
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
  gap: var(--space-4);
  margin-block-start: var(--space-5);
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.sidebar {
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 24rem);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: start;
}

.card,
.case-card,
.callout,
.panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.card,
.case-card,
.panel {
  padding: var(--space-5);
}

.case-card {
  display: grid;
  gap: var(--space-4);
}

.case-card h3,
.card h3,
.panel h3 {
  font-size: var(--text-lg);
}

.card p,
.card ul,
.case-card p,
.panel p,
.panel ul {
  color: var(--color-muted);
}

.metadata-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.metadata-list li,
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0 var(--space-3);
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: var(--text-xs);
  font-weight: 700;
}

.status {
  border-inline-start: 0.375rem solid var(--color-accent);
  padding-inline-start: var(--space-4);
}

.status.warning {
  border-inline-start-color: var(--color-warning);
}

.status.success {
  border-inline-start-color: var(--color-success);
}

.callout {
  max-width: var(--measure);
  margin-block-start: var(--space-5);
  padding: clamp(1.25rem, 3vw, 2rem);
  border-inline-start: 0.45rem solid var(--color-accent);
}

.prose {
  max-width: var(--measure);
}

.prose p,
.prose li {
  color: var(--color-muted);
}

.plain-list {
  padding-inline-start: 1.2rem;
}

.pattern-table {
  width: 100%;
  border-collapse: collapse;
  margin-block-start: var(--space-5);
  background: var(--color-surface);
}

.pattern-table caption {
  margin-block-end: var(--space-3);
  color: var(--color-muted);
  text-align: left;
}

.pattern-table th,
.pattern-table td {
  border: 1px solid var(--color-border);
  padding: var(--space-3);
  text-align: left;
  vertical-align: top;
}

.pattern-table th {
  background: var(--color-surface-alt);
  color: var(--color-ink);
  font-size: var(--text-sm);
}

.case-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 22rem);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: start;
}

.case-aside {
  position: sticky;
  top: var(--space-5);
}

.timeline {
  display: grid;
  gap: var(--space-4);
  margin-block-start: var(--space-5);
}

.timeline article {
  border-inline-start: 0.25rem solid var(--color-accent);
  padding-inline-start: var(--space-4);
}

.timeline h3 {
  font-size: var(--text-lg);
  margin-block-end: var(--space-1);
}

.meta {
  margin-block-end: var(--space-2);
  color: var(--color-muted);
  font-weight: 700;
}

.story-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(16rem, 24rem);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: start;
}

.story-layout .prose {
  max-width: 78ch;
}

.image-placeholder,
.story-image {
  position: sticky;
  top: var(--space-5);
  margin: 0;
}

.story-image img {
  display: block;
  width: 100%;
  max-height: 32rem;
  border-radius: var(--radius-md);
  object-fit: contain;
  box-shadow: var(--shadow-subtle);
}

.image-placeholder div {
  min-height: 18rem;
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.image-placeholder figcaption,
.story-image figcaption {
  margin-block-start: var(--space-3);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.form {
  display: grid;
  gap: var(--space-4);
  max-width: 42rem;
}

.form-field {
  display: grid;
  gap: var(--space-2);
}

.form label {
  color: var(--color-ink);
  font-weight: 800;
}

.hint,
.error-message {
  margin: 0;
  font-size: var(--text-sm);
}

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

.error-message {
  color: var(--color-error);
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  border: 2px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  background: var(--color-surface);
  color: var(--color-ink);
  font: inherit;
}

textarea {
  min-height: 9rem;
  resize: vertical;
}

[aria-invalid="true"] {
  border-color: var(--color-error);
}

.site-footer {
  border-block-start: 1px solid var(--color-border);
  padding-block: var(--space-6);
  background: var(--color-ink);
  color: #ffffff;
}

.site-footer a {
  color: #ffffff;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-4);
}

.footer-inner p {
  margin: 0;
}

@media (max-width: 840px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav ul {
    justify-content: flex-start;
  }

  .grid.two,
  .grid.sidebar,
  .hero-grid,
  .case-layout,
  .resume-grid,
  .story-layout {
    grid-template-columns: 1fr;
  }

  .case-aside,
  .image-placeholder,
  .story-image {
    position: static;
  }

  h1 {
    max-width: 100%;
  }
}

@media (max-width: 560px) {
  .site-nav ul {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
  }

  .site-nav a {
    width: 100%;
  }

  .button {
    width: 100%;
  }

  .pattern-table {
    display: block;
    overflow-x: auto;
  }
}