*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --text: #111;
  --text-muted: #555;
  --text-faint: #999;
  --bg: #fff;
  --rule: #ddd;
  --code-bg: #f4f4f4;
  --content: 640px;
  --gutter: 24px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

html {
  font-size: 112.5%;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
}

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}


.hero {
  padding: 10rem var(--gutter) 7rem;
  text-align: center;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.05;
}

.tagline {
  margin-top: 1.25rem;
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--text-muted);
  line-height: 1.4;
}

.hero-actions {
  margin-top: 2.75rem;
  display: flex;
  justify-content: center;
  gap: 0.875rem;
  flex-wrap: wrap;
}


.btn {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.25;
  text-decoration: none;
  border: 1.5px solid var(--text);
  border-radius: 4px;
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
}


.story {
  max-width: var(--content);
  margin: 0 auto;
  padding: 0 var(--gutter) 6.5rem;
}

.step + .step {
  margin-top: 3.25rem;
}

.step h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.step p {
  margin-top: 0.625rem;
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 34em;
}


.build {
  max-width: var(--content);
  margin: 0 auto;
  padding: 4.5rem var(--gutter) 5.5rem;
  border-top: 1px solid var(--rule);
}

.build h2 {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 2rem;
}

.build-links {
  display: flex;
  gap: 2rem;
  margin-bottom: 2.75rem;
}

.build-links a {
  font-weight: 500;
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1.5px solid var(--text);
}

.repos {
  list-style: none;
}

.repos li {
  padding: 0.4rem 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.repos li a {
  font-weight: 600;
  text-decoration: none;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.875em;
}


footer {
  max-width: var(--content);
  margin: 0 auto;
  padding: 2.5rem var(--gutter) 4rem;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
  color: var(--text-faint);
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

footer a {
  color: var(--text-faint);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}


@media (max-width: 680px) {
  html {
    font-size: 100%;
  }

  .hero {
    padding: 6rem var(--gutter) 4.5rem;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .tagline {
    font-size: 1.075rem;
  }

  .story {
    padding-bottom: 4.5rem;
  }

  .step + .step {
    margin-top: 2.5rem;
  }

  .step h2 {
    font-size: 1.5rem;
  }

  .build {
    padding: 3.25rem var(--gutter) 3.5rem;
  }

  footer {
    padding: 2rem var(--gutter) 2.5rem;
  }
}

@media (max-width: 400px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    text-align: center;
  }
}