:root {
  --paper: #e6ecf1;
  --ink: #161c22;
  --mute: #5a6670;
  --line: #c5ced6;
  --steel: #3e5a6c;
  --moon: #f3f6f8;
  --shadow: rgba(22, 28, 34, 0.14);
  --display: "Italiana", "Times New Roman", serif;
  --body: "Literata", "Iowan Old Style", "Palatino Linotype", serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  overflow-x: hidden;
}

a {
  color: inherit;
}

.sky {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.moon {
  position: absolute;
  top: -18vh;
  right: -6vw;
  width: min(36vw, 420px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 38%, #ffffff 0%, var(--moon) 42%, #cfd8e0 78%, #b7c3cd 100%);
  box-shadow:
    inset -28px -18px 60px rgba(90, 108, 122, 0.22),
    0 0 80px rgba(243, 246, 248, 0.55);
  animation: libration 48s ease-in-out infinite;
}

@keyframes libration {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(-2.5%, 1.8%, 0);
  }
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
  width: 100%;
}

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.75rem 6vw 0;
}

.mark {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav a {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--mute);
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--ink);
}

.hero {
  width: 100%;
  padding: 16vh 6vw 12vh;
}

.eyebrow {
  margin: 0 0 1.25rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
}

h1 {
  margin: 0 0 1.5rem;
  max-width: 16ch;
  font-family: var(--display);
  font-size: clamp(3rem, 7vw, 5.75rem);
  font-weight: 400;
  line-height: 0.92;
  letter-spacing: -0.02em;
}

.lede {
  margin: 0 0 1.25rem;
  max-width: 40rem;
  color: var(--mute);
}

.focus {
  margin: 0 0 2.25rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.7;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
}

.cta,
.mail {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-decoration: none;
}

.cta {
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--ink);
}

.cta:hover,
.cta:focus-visible,
.mail:hover,
.mail:focus-visible {
  color: var(--steel);
  border-color: var(--steel);
}

.approach,
.contact {
  padding: 0 6vw 8rem;
}

.approach h2,
.contact h2 {
  margin: 0 0 2rem;
  font-family: var(--display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 400;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2.5rem 3rem;
  width: 100%;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.principles h3 {
  margin: 0 0 0.75rem;
  font-family: var(--body);
  font-size: 1.05rem;
  font-weight: 500;
}

.principles p,
.contact p {
  margin: 0;
  color: var(--mute);
}

.contact {
  max-width: none;
}

.contact p {
  max-width: 40rem;
}

.mail {
  margin-top: 1.5rem;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--ink);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  padding: 0 6vw 2rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mute);
}

a:focus-visible {
  outline: 2px solid var(--steel);
  outline-offset: 4px;
}

@media (max-width: 800px) {
  .hero {
    padding-top: 12vh;
  }

  .principles {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .moon {
    right: -18vw;
    top: -12vh;
    width: min(52vw, 280px);
    opacity: 0.7;
  }
}

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

  .moon {
    animation: none;
  }
}