:root {
  --ground: #faf9f7;
  --ink:    #14140f;
  --grey:   #6a6a63;
  --rule:   #dedcd6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground: #0f0f0e;
    --ink:    #e9e8e3;
    --grey:   #8d8d86;
    --rule:   #2a2a27;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 14vh 1.5rem 0;
  background: var(--ground);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

main, footer {
  max-width: 40rem;
  margin: 0 auto;
}

p { margin: 0; }


/* 1 — Wordmark */

.wordmark h1 {
  margin: 0;
  font-size: clamp(2.25rem, 7vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.caret {
  display: inline-block;
  width: 0.075em;
  height: 0.82em;
  margin-left: 0.14em;
  vertical-align: -0.03em;
  background: var(--ink);
  animation: blink 1.2s steps(1, end) infinite;
}

@keyframes blink {
  0%, 50%  { opacity: 1; }
  51%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .caret { animation: none; }
}

.subline {
  margin-top: 1.5rem;
  max-width: 32rem;
  font-size: 1.1875rem;
  line-height: 1.55;
  color: var(--grey);
  text-wrap: pretty;
}


/* 2 — Principles */

.principles {
  margin-top: 6rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--rule);
}

.principles h2 {
  margin: 0 0 1.75rem;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--grey);
}

.principles p + p {
  margin-top: 1.125rem;
}

.principles p {
  max-width: 34rem;
  text-wrap: pretty;
}


/* 3 — Contact */

.contact {
  margin-top: 6rem;
}

.contact a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.15em;
  font-size: 1.1875rem;
}

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

.contact a:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 0.35rem;
  border-radius: 1px;
}


/* 4 — Footer */

footer {
  margin-top: 10rem;
  padding: 2rem 0 4rem;
  font-size: 0.875rem;
  color: var(--grey);
}

@media (max-width: 30rem) {
  body { padding-top: 8vh; }
  .principles, .contact { margin-top: 4.5rem; }
  footer { margin-top: 7rem; }
}