:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --paragraph: #6b7280;
  --accent: #0f62fe;
  --max: 920px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Nunito", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 16px 40px;
}

header,
footer,
section {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  margin-bottom: 14px;
}

h1 {
  margin: 0 0 8px;
  font-size: 1.8rem;
  line-height: 1.25;
}

h2 {
  margin: 0 0 10px;
  font-size: 1.15rem;
  line-height: 1.3;
}

h3 {
  margin: 12px 0 6px;
  font-size: 1rem;
  line-height: 1.3;
}

p,
ul {
  margin: 8px 0;
}

p {
  color: var(--paragraph);
}

ul {
  padding-left: 20px;
}

ul,
li {
  color: var(--paragraph);
}

.meta {
  color: var(--muted);
  margin: 0;
}

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

.top-nav {
  margin-bottom: 16px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid #d8e4ff;
  background: #f3f7ff;
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
  line-height: 1.2;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.back-link:hover {
  background: #eaf1ff;
  border-color: #b9ccff;
  transform: translateY(-1px);
}

.back-link:focus-visible {
  outline: 3px solid #9eb9ff;
  outline-offset: 2px;
}

footer p {
  margin: 0;
}