/* 1. Design tokens: start here to change the visual identity. */
:root {
  color-scheme: light;
  --color-paper: #f8f7f3;
  --color-ink: #242722;
  --color-muted: #62665f;
  --color-accent: #234ed8;
  --color-accent-dark: #193cae;
  --color-line: #d8dad2;
  --color-blue-tint: #edf1fa;
  --color-blue-line: #c6d1e9;
  --color-about: #eeefe8;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --content-width: 1168px;
}

/* 2. Base and accessibility. No web fonts or other network dependencies. */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 2rem;
}

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

::selection {
  color: var(--color-ink);
  background: #d8e1ff;
}

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

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

h2 {
  font-size: clamp(2.2rem, 4vw, 3.25rem);
}

h3 {
  font-size: clamp(2.15rem, 3.5vw, 3rem);
  overflow-wrap: anywhere;
}

h4 {
  font-size: 0.875rem;
  font-weight: 650;
  line-height: 1.5;
}

em {
  color: var(--color-accent);
  font-weight: 400;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}

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

a:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 6px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  z-index: 10;
  inset: 1rem auto auto 1rem;
  padding: 0.65rem 1.25rem;
  color: white;
  background: var(--color-accent);
  transform: translateY(-200%);
}

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

.container {
  width: min(var(--content-width), calc(100% - 5rem));
  margin-inline: auto;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 400;
  line-height: 1.65;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.section {
  padding-block: 6rem;
}

.section-index {
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

/* 3. Header and introduction. */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  min-height: 104px;
  border-bottom: 1px solid var(--color-line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.4;
  text-decoration: none;
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 400;
  letter-spacing: -0.09em;
  line-height: 1;
}

.brand-mark > span {
  color: var(--color-accent);
}

.nav-list {
  display: flex;
  gap: 2.25rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  font-size: 0.8125rem;
  text-decoration: none;
}

.nav-list a:hover {
  text-decoration: underline;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 246px;
  align-items: center;
  gap: 3rem;
  padding-block: 6.5rem 7rem;
}

.hero .eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.small-square {
  display: inline-block;
  flex: 0 0 6px;
  height: 6px;
  background: var(--color-accent);
}

h1 {
  margin-top: 1.65rem;
  font-size: clamp(3rem, 5.6vw, 4.8rem);
  line-height: 1.08;
}

.hero-description {
  max-width: 555px;
  margin-top: 1.8rem;
  color: var(--color-muted);
  font-size: 1.0625rem;
  line-height: 1.85;
}

.primary-link {
  display: inline-flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  min-height: 48px;
  margin-top: 2rem;
  padding: 0.65rem 1.1rem;
  color: white;
  background: var(--color-accent);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
}

.primary-link:hover {
  color: white;
  background: var(--color-accent-dark);
}

.primary-link > span {
  font-size: 1.2rem;
}

.focus-note {
  margin-top: 3.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-accent);
}

.focus-note .eyebrow {
  color: var(--color-accent);
  font-size: 0.625rem;
}

.focus-note ol {
  display: grid;
  gap: 1.1rem;
  padding: 0;
  margin: 1.5rem 0;
  list-style: none;
}

.focus-note li {
  display: flex;
  align-items: baseline;
  gap: 0.875rem;
  font-size: 0.875rem;
  line-height: 1.6;
}

.note-number {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.625rem;
}

.note-footer {
  color: var(--color-muted);
  font-size: 0.75rem;
}

/* 4. Projects: the featured project gets the most space. */
.projects {
  padding-top: 3rem;
  border-top: 1px solid var(--color-line);
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 2rem;
  margin-bottom: 3.5rem;
}

.section-description {
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

.project {
  border-top: 1px solid var(--color-line);
}

.project-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  padding-block: 1.5rem 2.5rem;
}

.project-topline .eyebrow {
  color: var(--color-accent);
}

.label-divider {
  margin-inline: 0.65rem;
  color: var(--color-muted);
}

.project-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-muted);
  font-size: 0.6875rem;
}

.project-status > span {
  flex: 0 0 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-accent);
}

.featured-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  align-items: start;
  gap: clamp(2rem, 6.5vw, 6.5rem);
}

.project-deck {
  margin-top: 0.8rem;
  margin-bottom: 2rem;
  color: var(--color-muted);
  font-family: var(--font-display);
  font-size: 1.5625rem;
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.project-detail + .project-detail {
  margin-top: 1.4rem;
}

.project-detail p {
  margin-top: 0.4rem;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 1.8rem 0 1.15rem;
}

.tech-list li {
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  line-height: 1.5;
}

.text-link {
  display: inline-block;
  padding-block: 0.55rem;
  color: var(--color-accent);
  font-size: 0.8125rem;
  font-weight: 600;
}

.text-link > span[aria-hidden] {
  display: inline-block;
  margin-left: 0.35rem;
  text-decoration: none;
}

.text-link:hover {
  color: var(--color-accent-dark);
  text-decoration-thickness: 2px;
}

.workflow {
  padding: 1.75rem;
  background: var(--color-blue-tint);
  border: 1px solid var(--color-blue-line);
}

.workflow figcaption {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--color-accent);
}

.workflow figcaption > span {
  font-size: 1.1rem;
  line-height: 1;
}

.workflow-steps {
  margin: 1.75rem 0 1.5rem;
  padding: 0;
  list-style: none;
}

.workflow-steps li {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1rem 1.15rem;
  background: var(--color-paper);
  border: 1px solid var(--color-blue-line);
}

.workflow-steps li + li {
  margin-top: 1.5rem;
}

.workflow-steps li + li::before {
  position: absolute;
  content: "";
  top: -1.5rem;
  left: 50%;
  height: 1.5rem;
  border-left: 1px solid var(--color-accent);
}

.workflow-steps li + li::after {
  position: absolute;
  content: "";
  top: -7px;
  left: calc(50% - 3px);
  width: 7px;
  height: 7px;
  border-right: 1px solid var(--color-accent);
  border-bottom: 1px solid var(--color-accent);
  transform: rotate(45deg);
}

.workflow-steps .step-label {
  margin-bottom: 0.45rem;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.workflow-steps strong {
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.5;
}

.workflow-steps li > span:last-child {
  margin-top: 0.25rem;
  color: var(--color-muted);
  font-size: 0.6875rem;
  line-height: 1.6;
}

.workflow-footer {
  color: var(--color-muted);
  font-size: 0.6875rem;
  line-height: 1.8;
}

.workflow-footer > span {
  color: var(--color-accent);
}

.evaluation-note {
  margin-top: 2rem;
  padding-left: 1.25rem;
  border-left: 2px solid var(--color-accent);
}

.evaluation-note p {
  margin-top: 0.6rem;
  color: var(--color-muted);
  font-size: 0.8125rem;
  line-height: 1.8;
}

.evaluation-note .text-link {
  margin-top: 0.35rem;
  font-size: 0.75rem;
}

.link-language {
  font-weight: 400;
}

.foundations-project {
  margin-top: 4rem;
}

.foundations-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(2rem, 6.5vw, 6.5rem);
}

.foundations-project .project-deck {
  margin-bottom: 1.5rem;
}

.foundations-project .tech-list {
  margin-top: 0;
}

/* 5. Background, contact, and footer. */
.about-section {
  background: var(--color-about);
  border-block: 1px solid var(--color-line);
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(3rem, 8vw, 8rem);
}

.about-copy h2 {
  margin-bottom: 2rem;
  font-size: clamp(2.3rem, 3.5vw, 3rem);
  line-height: 1.15;
}

.about-copy > p:not(.eyebrow) {
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.85;
}

.about-copy > p + p {
  margin-top: 1rem;
}

.background-facts > div {
  padding-block: 1.3rem;
  border-top: 1px solid var(--color-line);
}

.background-facts > div:last-child {
  border-bottom: 1px solid var(--color-line);
}

.background-facts dt {
  margin-bottom: 0.45rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.background-facts dd {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.7;
}

.background-facts dd > span {
  display: block;
  color: var(--color-muted);
  font-size: 0.8125rem;
  font-weight: 400;
}

.contact-section {
  padding-block: 5rem;
  color: white;
  background: var(--color-accent);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(3rem, 8vw, 8rem);
}

.contact-section .section-index {
  color: #dce5ff;
}

.contact-section h2 {
  font-size: clamp(2.25rem, 4vw, 3.25rem);
}

.contact-section h2 + p {
  max-width: 425px;
  margin-top: 1.4rem;
  color: #e5ebff;
  font-size: 0.9375rem;
  line-height: 1.8;
}

.contact-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.contact-links li {
  border-top: 1px solid #7894eb;
}

.contact-links li:last-child {
  border-bottom: 1px solid #7894eb;
}

.contact-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.15rem;
  font-size: 1.2rem;
  line-height: 1.6;
  text-decoration: none;
}

.contact-links small {
  display: block;
  color: #e5ebff;
  font-size: 0.75rem;
}

.contact-links a > span[aria-hidden] {
  font-size: 1.6rem;
}

.contact-links a:hover {
  color: white;
  text-decoration: underline;
}

.contact-links a:focus-visible {
  outline-color: white;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  padding-block: 1.75rem;
  color: var(--color-muted);
  font-size: 0.6875rem;
}

.footer-note {
  margin-left: 1rem;
}

.site-footer a {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 44px;
}

/* 6. Smaller screens: preserve all content and keep navigation visible. */
@media (max-width: 1050px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) 210px;
    gap: 2rem;
  }

  h1 {
    font-size: clamp(2.85rem, 5.35vw, 4.4rem);
  }

  .workflow {
    padding: 1.2rem;
  }
}

@media (max-width: 800px) {
  .container {
    width: calc(100% - 3rem);
  }

  .section {
    padding-block: 4rem;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding-block: 4.5rem;
  }

  h1 {
    font-size: clamp(2.75rem, 8vw, 4.5rem);
  }

  .focus-note {
    margin: 0;
  }

  .focus-note ol {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
    margin-block: 1rem;
  }

  .focus-note li {
    flex-direction: column;
    gap: 0.25rem;
  }

  .note-footer {
    margin-top: 0.75rem;
  }

  .featured-layout,
  .foundations-layout,
  .about-layout,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .project-copy {
    max-width: 620px;
  }

  .workflow {
    padding: 1.75rem;
  }

  .section-heading {
    align-items: start;
  }

  .section-description {
    max-width: 180px;
    margin-top: 2.4rem;
  }

  .background-facts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 2rem;
  }

  .background-facts > div:last-child {
    border-bottom: 0;
  }

  .contact-section {
    padding-block: 3.5rem;
  }
}

@media (max-width: 540px) {
  .site-header {
    align-items: stretch;
    flex-direction: column;
    gap: 0.65rem;
    padding-block: 1.25rem 0.7rem;
  }

  .brand {
    align-self: start;
  }

  .nav-list {
    justify-content: space-between;
    gap: 1.5rem;
  }

  .hero {
    padding-block: 3.5rem;
  }

  h1 {
    font-size: clamp(2.3rem, 8.3vw, 2.8rem);
  }

  .hero-description {
    font-size: 1rem;
  }

  .focus-note ol {
    grid-template-columns: 1fr;
    gap: 0.7rem;
  }

  .focus-note li {
    flex-direction: row;
    gap: 0.9rem;
  }

  .section-heading {
    display: block;
    margin-bottom: 2rem;
  }

  .section-description {
    max-width: none;
    margin-top: 1.2rem;
  }

  .section-description br {
    display: none;
  }

  .project-topline {
    padding-bottom: 1.75rem;
  }

  .project-deck {
    font-size: 1.375rem;
  }

  .workflow {
    padding: 1.2rem;
  }

  .background-facts {
    grid-template-columns: 1fr;
  }

  .footer-note {
    display: block;
    margin-left: 0;
  }
}

/* 7. Respect motion preferences and make the page useful when printed. */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media (forced-colors: active) {
  .primary-link {
    border: 1px solid ButtonText;
  }
}

@media print {
  :root {
    --color-paper: white;
    --color-ink: black;
    --color-muted: #333;
  }

  body {
    font-size: 10pt;
  }

  .container {
    width: 100%;
  }

  .site-header nav,
  .skip-link,
  .primary-link,
  .site-footer a {
    display: none;
  }

  .hero,
  .section,
  .contact-section {
    padding-block: 2rem;
  }

  .hero,
  .featured-layout,
  .foundations-layout,
  .about-layout,
  .contact-layout {
    display: block;
  }

  .focus-note,
  .project-evidence,
  .background-facts,
  .foundations-details,
  .contact-links {
    margin-top: 1.5rem;
  }

  .contact-section,
  .about-section,
  .workflow {
    color: black;
    background: white;
  }

  .contact-section .section-index,
  .contact-section h2 + p,
  .contact-links small {
    color: #333;
  }

  .project-detail,
  .workflow,
  .evaluation-note,
  .background-facts > div {
    break-inside: avoid;
  }

  h2,
  h3,
  h4 {
    break-after: avoid;
  }
}