:root {
  color-scheme: light;
  font-family: Inter, system-ui, sans-serif;
  line-height: 1.65;
  color: #202c3e;
  background: #f5f7fb;
}

body {
  box-sizing: border-box;
  max-width: 50rem;
  margin: 0 auto;
  padding: 1.5rem clamp(1rem, 4vw, 3rem) 2rem;
}

header, footer {
  padding: 1rem 0;
}

header a {
  font-weight: 700;
}

main {
  margin: 1rem 0;
  padding: clamp(1.25rem, 4vw, 3rem);
  background: #fff;
  border: 1px solid #dce4f0;
  border-radius: 0.8rem;
}

h1, h2 {
  line-height: 1.25;
  color: #142440;
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 4.5vw, 2.6rem);
  letter-spacing: -0.025em;
}

h2 {
  margin-top: 1.85rem;
  font-size: 1.25rem;
}

.intro {
  font-size: 1.12rem;
}

ol, ul {
  padding-left: 1.5rem;
}

li + li {
  margin-top: 0.45rem;
}

a {
  color: #214da8;
  text-underline-offset: 0.2em;
}

a:focus-visible {
  outline: 2px solid #214da8;
  outline-offset: 4px;
}

footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-size: 0.95rem;
}