:root {
  --bg: #f5f5f7;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --accent: #447cfb;
  --border: rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card: #1c1c1e;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --accent: #6b9bff;
    --border: rgba(255, 255, 255, 0.12);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 16px 32px;
}

header.page { text-align: center; margin-bottom: 32px; }
header.page h1 { font-size: 32px; line-height: 1.2; margin: 0 0 8px; }
header.page p { color: var(--muted); margin: 0; }

nav.lang { text-align: center; margin-bottom: 24px; font-size: 15px; }
nav.lang a { margin: 0 8px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 16px;
}

.app { display: flex; gap: 16px; align-items: flex-start; }
.app img { width: 64px; height: 64px; border-radius: 14px; flex-shrink: 0; }
.app h2 { margin: 0 0 4px; font-size: 20px; }
.app p { margin: 0 0 12px; color: var(--muted); }

.links { display: flex; flex-wrap: wrap; gap: 8px 20px; }

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

article h2 { font-size: 22px; margin: 32px 0 8px; }
article h3 { font-size: 17px; margin: 20px 0 4px; }
article ul { padding-left: 22px; }
article li { margin-bottom: 6px; }
.updated { color: var(--muted); font-size: 14px; text-align: center; }

footer {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  padding: 24px 16px 40px;
}