:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --line: #d7dce5;
  --accent: #1f6feb;
  --accent-strong: #174ea6;
}

* {
  box-sizing: border-box;
}

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

header,
main,
footer {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 22px;
}

header {
  padding-top: 32px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding-bottom: 28px;
}

nav a,
.link-grid a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 650;
}

nav a:hover,
.link-grid a:hover {
  color: var(--accent-strong);
  text-decoration: underline;
}

main {
  padding-bottom: 52px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 30px;
}

h1 {
  margin: 0 0 8px;
  font-size: 36px;
  line-height: 1.12;
}

h2 {
  margin: 34px 0 10px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 22px;
  line-height: 1.25;
}

p,
li {
  color: var(--muted);
  font-size: 16px;
}

ul {
  padding-left: 22px;
}

.meta {
  margin: 0 0 26px;
  color: var(--muted);
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.link-grid a {
  display: block;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
  padding: 16px;
}

footer {
  padding-bottom: 36px;
  color: var(--muted);
}

@media (max-width: 640px) {
  h1 {
    font-size: 30px;
  }

  .panel {
    padding: 22px;
  }
}