/* Design tokens: calm light theme */
:root {
  --color-bg: #F7F8FA;
  --color-text: #1F2933;
  --color-accent: #0F766E;
  --max-width: 42rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}

header,
main,
footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.25rem;
}

.hero {
  padding-top: 4rem;
  padding-bottom: 2rem;
}

h1 {
  margin: 0;
  font-size: 3rem;
  letter-spacing: 0.02em;
  color: var(--color-accent);
}

.tagline {
  margin: 0.5rem 0 0;
  font-size: 1.25rem;
}

h2 {
  margin-top: 2.5rem;
  font-size: 1.5rem;
}

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

a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

footer {
  margin-top: 3rem;
  font-size: 0.875rem;
}