:root {
  color-scheme: light;
  --background: #f7f8fa;
  --surface: #ffffff;
  --ink: #14181f;
  --body: #364153;
  --muted: #667085;
  --border: #dde2ea;
  --accent: #2563eb;
  --quiet: #eef4ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  color: var(--body);
  background: var(--background);
}

header,
main,
footer {
  width: min(880px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  padding: 56px 0 24px;
}

main {
  padding: 0 0 56px;
}

section {
  padding: 28px;
  margin: 16px 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
  color: var(--ink);
}

h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: 1.35rem;
}

h3 {
  margin-top: 28px;
  margin-bottom: 8px;
  font-size: 1.05rem;
}

p {
  margin: 0 0 12px;
}

ul {
  margin: 0;
  padding-left: 20px;
}

li {
  margin: 8px 0;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

.meta {
  margin-top: 16px;
  color: var(--muted);
}

.summary {
  display: grid;
  gap: 12px;
  padding: 20px;
  margin-top: 24px;
  border: 1px solid #c7d7fe;
  border-radius: 8px;
  background: var(--quiet);
  color: var(--ink);
}

.summary strong {
  display: block;
  color: var(--ink);
}

.language-note {
  color: var(--muted);
  font-size: 0.95rem;
}

footer {
  padding: 0 0 48px;
  color: var(--muted);
  font-size: 0.95rem;
}