:root {
  --color-canvas: #f9f9f9;
  --color-surface: #ffffff;
  --color-ink: #28303d;
  --color-muted: #636363;
  --color-faint: #8c8f94;
  --color-line: #e8e8e5;
  --color-accent: #d8613c;
  --color-accent-soft: #f4e5df;
  --color-green: #b1c5a4;
  --color-green-soft: #edf2ea;
  --color-code: #1b1e23;
  --color-code-muted: #a9b0ba;
  --color-code-accent: #b9f35b;
  --font-body: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", "SFMono-Regular", Consolas, monospace;
  --content-wide: 1280px;
  --content-text: 680px;
  --radius-sm: 12px;
  --radius-md: 22px;
  --radius-lg: 32px;
  --shadow-card: 0 24px 80px rgb(40 48 61 / 9%);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-thickness: 2px;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

h1,
h2,
h3,
p,
blockquote,
figure,
dl,
dd {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

h1 {
  max-width: 10ch;
  margin-bottom: 1.6rem;
  font-size: clamp(3.1rem, 7vw, 6rem);
}

h2 {
  margin-bottom: 1.5rem;
  font-size: clamp(2.25rem, 4.2vw, 4.2rem);
}

h3 {
  margin-bottom: 0.85rem;
  font-size: clamp(1.3rem, 2vw, 1.7rem);
}

p:last-child {
  margin-bottom: 0;
}

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

.text-column {
  max-width: var(--content-text);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 1rem;
  left: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-ink);
  color: #fff;
  transform: translateY(-160%);
}

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

.site-header {
  border-bottom: 1px solid var(--color-line);
  background: rgb(255 255 255 / 96%);
}

.header-inner {
  min-height: 108px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 54px;
  aspect-ratio: 1;
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  border: 4px solid var(--color-ink);
  border-radius: 50%;
}

.brand-mark img {
  width: 26px;
  height: 21px;
}

.brand-copy {
  display: grid;
  line-height: 1.2;
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.brand-meta {
  margin-top: 0.2rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.header-actions,
.site-nav {
  display: flex;
  align-items: center;
}

.header-actions {
  gap: 2rem;
}

.site-nav {
  gap: 1.8rem;
}

.site-nav a,
.header-github {
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
}

.site-nav a:hover,
.header-github:hover {
  text-decoration: underline;
}

.header-github {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.header-github img {
  width: 19px;
  height: 19px;
}

.hero {
  padding-block: clamp(5rem, 10vw, 9.5rem);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(380px, 0.94fr);
  gap: clamp(3.5rem, 8vw, 8rem);
  align-items: center;
}

.eyebrow,
.section-index {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1.5rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.eyebrow::before,
.section-index::before {
  width: 1.8rem;
  height: 2px;
  background: var(--color-accent);
  content: "";
}

.hero-lead {
  max-width: 39rem;
  margin-bottom: 2.1rem;
  color: var(--color-muted);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.55;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.8rem 1.2rem;
  border: 1px solid var(--color-ink);
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 650;
  text-decoration: none;
  transition: transform 160ms ease, background-color 160ms ease, color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

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

.button-primary:hover {
  background: #111721;
}

.button-secondary {
  background: #fff;
  color: var(--color-ink);
}

.button-light {
  border-color: #fff;
  background: #fff;
  color: var(--color-ink);
}

.button-icon {
  width: 18px;
  height: 18px;
  filter: invert(1);
}

.button-light .button-icon,
.button-secondary .button-icon {
  filter: none;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
}

.hero-tags li {
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.code-card {
  position: relative;
  padding: clamp(1.25rem, 3vw, 2.1rem);
  border-radius: var(--radius-lg);
  background: var(--color-code);
  box-shadow: 18px 18px 0 var(--color-green-soft), var(--shadow-card);
  color: #fff;
  transform: rotate(1.25deg);
}

.code-card::before {
  content: none;
}

.code-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgb(255 255 255 / 10%);
}

.window-dots {
  display: flex;
  gap: 0.45rem;
}

.window-dots span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-accent);
}

.window-dots span:nth-child(2) {
  background: #c2a990;
}

.window-dots span:nth-child(3) {
  background: var(--color-green);
}

.file-name {
  color: var(--color-code-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.code-card pre {
  margin: 0;
  padding-block: clamp(2rem, 5vw, 4.5rem);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: clamp(0.82rem, 1.4vw, 1rem);
  line-height: 1.9;
  white-space: pre-wrap;
}

.code-comment {
  color: var(--color-code-muted);
}

.code-directive {
  color: var(--color-code-accent);
}

.code-string {
  color: #e9c6a2;
}

.code-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--color-code-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.code-card-footer kbd {
  padding: 0.25rem 0.45rem;
  border: 1px solid rgb(255 255 255 / 18%);
  border-radius: 6px;
  background: rgb(255 255 255 / 7%);
  color: #fff;
  font: inherit;
}

.section {
  padding-block: clamp(5rem, 10vw, 9rem);
  border-top: 1px solid var(--color-line);
}

.section-tinted {
  background: var(--color-canvas);
}

.section-heading {
  max-width: 800px;
  margin-bottom: clamp(2.5rem, 6vw, 5rem);
}

.section-heading p {
  max-width: 42rem;
  color: var(--color-muted);
  font-size: 1.15rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card {
  min-height: 330px;
  display: flex;
  flex-direction: column;
  padding: clamp(1.5rem, 3vw, 2.3rem);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.feature-card:nth-child(2) {
  background: var(--color-green-soft);
}

.feature-card:nth-child(3) {
  background: var(--color-accent-soft);
}

.icon-disc {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  margin-bottom: auto;
  border-radius: 50%;
  background: var(--color-ink);
}

.icon-disc img {
  width: 22px;
  max-height: 22px;
  filter: invert(1);
}

.feature-card p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.editorial-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(3rem, 9vw, 9rem);
  align-items: start;
}

.editorial-copy {
  max-width: 42rem;
  font-size: 1.12rem;
}

.editorial-copy > p {
  color: var(--color-muted);
}

.fact-list {
  margin: 2.5rem 0 0;
  border-top: 1px solid var(--color-line);
}

.fact-row {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 1rem;
  padding-block: 1rem;
  border-bottom: 1px solid var(--color-line);
}

.fact-row dt {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.fact-row dd {
  margin: 0;
  font-weight: 600;
}

.person-card {
  position: relative;
  padding: clamp(2rem, 5vw, 4.5rem);
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-green-soft);
}

.person-card::after {
  position: absolute;
  right: -3rem;
  bottom: -5rem;
  width: 18rem;
  height: 18rem;
  border: 2.5rem solid rgb(40 48 61 / 7%);
  border-radius: 50%;
  content: "";
}

.person-card-inner {
  position: relative;
  z-index: 1;
  max-width: 52rem;
}

.person-card h2 {
  max-width: 12ch;
}

.person-card p {
  max-width: 43rem;
  margin-bottom: 1.5rem;
  font-size: clamp(1.15rem, 2vw, 1.4rem);
}

.story-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(3rem, 9vw, 9rem);
}

.story-copy p {
  color: var(--color-muted);
}

.quote-card {
  padding: clamp(2rem, 5vw, 4rem);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
}

.quote-mark {
  margin-bottom: 1.7rem;
  color: var(--color-accent);
  font-family: Georgia, serif;
  font-size: 5rem;
  line-height: 0.6;
}

.quote-card blockquote {
  margin-bottom: 1.8rem;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  font-weight: 520;
  letter-spacing: -0.025em;
  line-height: 1.35;
}

.quote-card figcaption {
  color: var(--color-muted);
  font-size: 0.9rem;
}

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

.resource-card {
  min-height: 170px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(1.5rem, 3vw, 2.2rem);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease;
}

.resource-card:hover {
  border-color: var(--color-ink);
  transform: translateY(-3px);
  text-decoration: none;
}

.resource-type {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.resource-title {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.025em;
}

.resource-arrow {
  color: var(--color-accent);
  font-size: 1.35rem;
}

.cta-section {
  padding-block: clamp(4rem, 8vw, 7rem);
}

.cta-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: end;
  padding: clamp(2.3rem, 6vw, 5.5rem);
  border-radius: var(--radius-lg);
  background: var(--color-ink);
  color: #fff;
}

.cta-card h2 {
  max-width: 14ch;
  margin-bottom: 0;
}

.cta-card .eyebrow {
  color: #ccd1d8;
}

.site-footer {
  padding-block: 2.4rem;
  border-top: 1px solid var(--color-line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
}

@media (max-width: 980px) {
  .site-nav {
    display: none;
  }

  .hero-grid,
  .editorial-grid,
  .story-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 5rem;
  }

  .hero-copy {
    max-width: 760px;
  }

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

  .feature-card:last-child {
    grid-column: 1 / -1;
  }

  .story-grid {
    gap: 3rem;
  }
}

@media (max-width: 720px) {
  body {
    font-size: 1rem;
  }

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

  .header-inner {
    min-height: 88px;
  }

  .brand-mark {
    width: 48px;
    border-width: 3px;
  }

  .brand-mark img {
    width: 22px;
  }

  .brand-meta,
  .header-github span {
    display: none;
  }

  .header-github img {
    width: 23px;
    height: 23px;
  }

  .hero {
    padding-top: 4.3rem;
  }

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

  h1 {
    font-size: clamp(2.9rem, 15vw, 4.5rem);
  }

  h2 {
    font-size: clamp(2.1rem, 11vw, 3.2rem);
  }

  .code-card {
    border-radius: var(--radius-md);
    box-shadow: 8px 10px 0 var(--color-green-soft), var(--shadow-card);
    transform: none;
  }

  .feature-grid,
  .resource-grid,
  .cta-card {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: 280px;
  }

  .feature-card:last-child {
    grid-column: auto;
  }

  .fact-row {
    grid-template-columns: 6.5rem 1fr;
  }

  .person-card::after {
    opacity: 0.55;
  }

  .cta-card {
    align-items: start;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

}

@media (max-width: 420px) {
  .brand-name {
    font-size: 1.13rem;
  }

  .button-row .button {
    width: 100%;
  }

  .hero-tags {
    gap: 0.45rem;
  }

  .code-card-footer {
    align-items: flex-start;
    flex-direction: column;
  }

}

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

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

@media print {
  .site-header,
  .button-row,
  .site-footer {
    display: none;
  }

  body {
    color: #000;
    font-size: 11pt;
  }

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

  .code-card,
  .cta-card {
    box-shadow: none;
  }
}