:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --text: #1e252e;
  --muted: #5e6a78;
  --line: #d8dee7;
  --panel: #ffffff;
  --accent: #0f766e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1040px;
  margin: 0 auto;
  padding: 22px 24px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

nav {
  display: flex;
  gap: 18px;
}

a {
  color: var(--accent);
  text-decoration: none;
}

main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 64px 24px 72px;
}

.hero {
  max-width: 720px;
}

.eyebrow {
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 13px;
}

h1 {
  margin: 12px 0 18px;
  font-size: 44px;
  line-height: 1.1;
  letter-spacing: 0;
}

.summary {
  color: var(--muted);
  font-size: 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 56px;
}

article {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}

h2 {
  margin: 0 0 10px;
  font-size: 18px;
}

article p {
  margin: 0;
  color: var(--muted);
}

footer {
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 720px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  main {
    padding-top: 42px;
  }

  h1 {
    font-size: 34px;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}