:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #5f6368;
  --line: #e6e6e6;
  --link: #085efc;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --text: #ececec;
    --muted: #a0a0a0;
    --line: #2a2a2a;
    --link: #6ea2ff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}

header.app {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

header.app img { width: 40px; height: 40px; border-radius: 10px; }
header.app a { color: var(--text); text-decoration: none; font-weight: 600; }

h1 { font-size: 28px; line-height: 1.25; margin: 24px 0 4px; }
h2 { font-size: 19px; margin: 32px 0 8px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 20px; }
a { color: var(--link); }

.muted { color: var(--muted); font-size: 14px; }

nav.links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 16px 0; }

ul.cards { list-style: none; padding: 0; }
ul.cards li { border: 1px solid var(--line); border-radius: 12px; padding: 16px; }

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}