:root {
  color-scheme: light;
  --font: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --bg: #ffffff;
  --text: #111111;
  --muted: #555555;
  --accent: #000000;
  --border: #d9d9d9;
  --space: clamp(1.8rem, 4vw, 2.6rem);
}

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

body {
  margin: 0;
  font-family: var(--font);
  line-height: 1.7;
  background: var(--bg);
  color: var(--text);
}

header,
main,
footer {
  width: min(720px, 100%);
  margin: 0 auto;
  padding-inline: clamp(1.25rem, 4vw, 1.75rem);
}

header {
  padding-block: calc(var(--space) + 0.5rem) var(--space);
  border-bottom: 1px solid var(--border);
  text-align: center;
  display: grid;
  gap: 0.75rem;
  justify-items: center;
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-emoji {
  margin: 0;
  font-size: 1.6rem;
}

.tagline {
  margin: 0;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.95rem;
}

main {
  padding-block: var(--space);
  display: grid;
  gap: var(--space);
}

section {
  display: grid;
  gap: 0.85rem;
}

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

.intro {
  gap: 1.2rem;
  text-align: center;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 0.6rem 1.4rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 auto;
}

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

h2 {
  margin: 0;
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

ul {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.4rem;
}

li {
  color: var(--muted);
}

li strong {
  color: var(--text);
}

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

li a:hover,
li a:focus-visible,
footer a:hover,
footer a:focus-visible {
  border-color: var(--accent);
}

code {
  font-family: inherit;
  padding: 0.1rem 0.3rem;
  background: #f4f4f4;
  border: 1px solid var(--border);
  border-radius: 3px;
}

footer {
  padding-block: var(--space);
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
}

footer p {
  margin: 0;
}

footer a {
  color: var(--accent);
}

@media (max-width: 560px) {
  header,
  main,
  footer {
    padding-inline: 1.2rem;
  }

  ul {
    padding-left: 1rem;
  }
}