:root {
  color-scheme: light;
  --black: #050505;
  --white: #ffffff;
  --grey: #676767;
  --line: #d9d9d9;
  font-family: Arial, Helvetica, sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--black);
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 3rem;
  color: var(--white);
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid var(--white);
  font-size: 1rem;
}

nav {
  display: flex;
  gap: 2rem;
  font-size: 0.875rem;
}

nav a,
.text-link {
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease;
}

nav a:hover,
nav a:focus-visible,
.text-link:hover,
.text-link:focus-visible {
  border-color: currentColor;
}

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 9rem 3rem 4rem;
  overflow: hidden;
  background: var(--black);
  color: var(--white);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.16;
  background-image:
    linear-gradient(to right, transparent calc(25% - 1px), #fff 25%, transparent calc(25% + 1px)),
    linear-gradient(to right, transparent calc(50% - 1px), #fff 50%, transparent calc(50% + 1px)),
    linear-gradient(to right, transparent calc(75% - 1px), #fff 75%, transparent calc(75% + 1px));
  pointer-events: none;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.eyebrow,
.index {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  max-width: 12ch;
  margin: 0.8rem 0 2rem;
  font-size: clamp(4rem, 12vw, 10rem);
  font-weight: 600;
  letter-spacing: -0.07em;
  line-height: 0.82;
}

.hero-copy {
  max-width: 34rem;
  margin: 0 0 2.5rem;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  line-height: 1.45;
}

.text-link {
  width: fit-content;
  padding-bottom: 0.2rem;
  font-size: 0.875rem;
  font-weight: 700;
}

.text-link span {
  display: inline-block;
  margin-left: 0.5rem;
}

.expertise,
.about {
  padding: 7rem 3rem;
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr 3fr;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--black);
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.75rem);
  font-weight: 500;
  letter-spacing: -0.04em;
}

.capability-list {
  margin-left: 25%;
}

.capability-list article {
  display: grid;
  grid-template-columns: 4rem minmax(12rem, 1fr) minmax(14rem, 1fr);
  gap: 1rem;
  align-items: baseline;
  padding: 2rem 0;
  border-bottom: 1px solid var(--line);
}

.capability-list article > span {
  color: var(--grey);
  font-size: 0.75rem;
}

h3 {
  margin: 0;
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 500;
}

.capability-list p {
  max-width: 30rem;
  margin: 0;
  color: var(--grey);
  font-size: 1rem;
  line-height: 1.6;
}

.about {
  background: var(--black);
  color: var(--white);
}

.about .section-heading {
  border-color: #444;
}

.about-copy {
  max-width: 47rem;
  margin: 5rem 0 2rem 25%;
  font-size: clamp(1.75rem, 4vw, 3.5rem);
  letter-spacing: -0.035em;
  line-height: 1.18;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 2rem 3rem;
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

footer p {
  margin: 0;
}

@media (max-width: 720px) {
  .site-header,
  .hero,
  .expertise,
  .about,
  footer {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .site-header {
    align-items: flex-start;
  }

  .wordmark span:last-child {
    max-width: 10rem;
  }

  nav {
    gap: 1rem;
  }

  .hero {
    min-height: 46rem;
  }

  h1 {
    font-size: clamp(3.6rem, 20vw, 6rem);
  }

  .expertise,
  .about {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }

  .section-heading {
    grid-template-columns: 3rem 1fr;
  }

  .capability-list,
  .about-copy {
    margin-left: 0;
  }

  .capability-list article {
    grid-template-columns: 2.5rem 1fr;
  }

  .capability-list p {
    grid-column: 2;
  }

  .about-copy {
    margin-top: 3.5rem;
  }

  footer {
    flex-direction: column;
  }
}

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