:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --ink: #0a0a0a;
  --muted: #525252;
  --line: #d4d4d4;
  --soft: #f5f5f5;
  --header: rgba(255, 255, 255, 0.94);
  --max: 78rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0a;
    --ink: #ffffff;
    --muted: #d4d4d4;
    --line: #3f3f46;
    --soft: #171717;
    --header: rgba(10, 10, 10, 0.94);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Geist, Inter, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-underline-offset: 0.22em;
}

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

button,
.button,
.nav-contact {
  min-height: 2.75rem;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  background: var(--ink);
  color: var(--bg);
  padding: 0.75rem 1rem;
}

.skip-link:focus {
  top: 1rem;
}

.site-header,
main,
footer {
  width: min(calc(100% - 2rem), var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 5rem;
  background: var(--header);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand img {
  display: block;
  width: clamp(9rem, 17vw, 12rem);
  height: auto;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2.5vw, 2rem);
  font-size: 0.9rem;
  font-weight: 560;
}

nav a {
  text-decoration: none;
}

nav a:hover,
nav a:focus-visible {
  text-decoration: underline;
}

.nav-contact {
  display: inline-flex;
  align-items: center;
  padding-inline: 1rem;
  border: 1px solid var(--ink);
}

.hero {
  min-height: calc(100vh - 5rem);
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(17rem, 0.7fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
  padding-block: clamp(4rem, 10vh, 8rem);
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  margin-top: 0;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

h1 {
  max-width: 11ch;
  margin-bottom: 2rem;
  font-size: clamp(3.4rem, 8.7vw, 7.6rem);
  font-weight: 650;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(2.35rem, 5.2vw, 4.8rem);
  font-weight: 620;
}

h3 {
  margin-bottom: 1rem;
  font-size: clamp(1.55rem, 2.2vw, 2rem);
  font-weight: 620;
}

.hero-summary {
  max-width: 42rem;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.25rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.1rem;
  border: 1px solid var(--ink);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}

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

.button-secondary {
  background: var(--bg);
}

.button:hover,
.button:focus-visible,
.nav-contact:hover,
.nav-contact:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  text-decoration: none;
}

.hero-index {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding-left: clamp(1.25rem, 3vw, 2.5rem);
  border-left: 1px solid var(--line);
}

.hero-mark {
  width: clamp(7rem, 13vw, 11rem);
  height: auto;
}

.hero-index ol {
  margin: 3rem 0 0;
  padding: 0;
  list-style: none;
}

.hero-index li {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.75rem;
  padding-block: 0.8rem;
  border-top: 1px solid var(--line);
  font-weight: 560;
}

.hero-index li span,
.project-number,
.service-list article > span {
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

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

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(17rem, 0.65fr);
  gap: 3rem;
  align-items: end;
  margin-bottom: 3.25rem;
}

.section-heading > p {
  margin: 0;
  color: var(--muted);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.filter {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg);
  color: var(--ink);
  padding: 0.65rem 1rem;
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.filter:hover,
.filter:focus-visible,
.filter.is-active {
  border-color: var(--ink);
}

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

.filter:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

.results {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.project-card {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  gap: 1rem;
  min-height: 23rem;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  transition: background-color 160ms ease;
}

.project-card:hover {
  background: var(--soft);
}

.project-card[hidden] {
  display: none;
}

.project-card p {
  max-width: 35rem;
  margin: 0;
  color: var(--muted);
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 2.25rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.tags li {
  padding: 0.35rem 0.55rem;
  border: 1px solid var(--line);
  font-size: 0.78rem;
}

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

.service-list article {
  display: grid;
  grid-template-columns: 3rem minmax(12rem, 0.8fr) minmax(16rem, 1.2fr);
  gap: 2rem;
  padding-block: 2rem;
  border-bottom: 1px solid var(--line);
}

.service-list h3,
.service-list p {
  margin: 0;
}

.service-list p {
  color: var(--muted);
}

.about-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(19rem, 0.8fr);
  gap: clamp(3rem, 8vw, 8rem);
}

.about-copy {
  align-self: end;
}

.about-copy p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 1.8vw, 1.25rem);
}

.about-copy p + p {
  margin-top: 1.5rem;
}

.contact-section {
  padding-block: clamp(6rem, 13vw, 12rem);
}

.contact-section h2 {
  max-width: 16ch;
  margin-bottom: 2.5rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: clamp(1.15rem, 2.2vw, 1.6rem);
  font-weight: 600;
}

.contact-link span {
  transition: transform 160ms ease;
}

.contact-link:hover span,
.contact-link:focus-visible span {
  transform: translate(0.18rem, -0.18rem);
}

footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1.5rem;
  align-items: center;
  min-height: 7rem;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
}

footer > a {
  font-weight: 650;
  text-decoration: none;
}

footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

footer div {
  display: flex;
  justify-content: flex-end;
  gap: 1.25rem;
}

.not-found {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding-block: 4rem;
}

.not-found img {
  width: 6rem;
  margin-bottom: 3rem;
}

.not-found h1 {
  margin-bottom: 1.5rem;
}

.not-found > p:not(.eyebrow) {
  max-width: 34rem;
  margin: 0 0 2rem;
  color: var(--muted);
  font-size: 1.15rem;
}

@media (max-width: 800px) {
  .site-header {
    min-height: 4.5rem;
  }

  nav a:not(.nav-contact) {
    display: none;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 4rem;
  }

  .hero-index {
    min-height: 22rem;
    padding-left: 0;
    padding-top: 2rem;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .section-heading,
  .about-section {
    grid-template-columns: 1fr;
  }

  .section-heading {
    align-items: start;
    gap: 1.5rem;
  }

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

  .project-card {
    min-height: auto;
  }

  .service-list article {
    grid-template-columns: 2rem 1fr;
    gap: 0.75rem 1rem;
  }

  .service-list article p {
    grid-column: 2;
  }

  footer {
    grid-template-columns: 1fr auto;
  }

  footer p {
    display: none;
  }
}

@media (max-width: 460px) {
  .site-header,
  main,
  footer {
    width: min(calc(100% - 1.25rem), var(--max));
  }

  h1 {
    font-size: clamp(3rem, 16vw, 4.4rem);
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .project-card {
    grid-template-columns: 1.7rem minmax(0, 1fr);
    padding: 1.25rem;
  }

  .card-meta {
    display: grid;
    justify-content: start;
  }
}

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

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