:root {
  color-scheme: light dark;
  --bg: #f3f5f7; --card: #fff; --text: #18212a; --muted: #5b6874; --line: #dde3e8;
  --primary: #2c7a8c; --ink: #2f4a6b; --soft: #e1eff2;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1418; --card: #19222a; --text: #ecf1f4; --muted: #a0adb8; --line: #2a3540; --primary: #5cbfd0; --ink: #cfe3f0; --soft: #14303a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.55 -apple-system, system-ui, 'Segoe UI', Roboto, sans-serif; }
a { color: var(--primary); }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }
header.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 18px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.25em; color: var(--ink); text-decoration: none; }
.brand img { width: 40px; height: 40px; }
.lang { color: var(--muted); font-size: 0.9em; text-decoration: none; }
.hero { text-align: center; padding: 36px 0 24px; }
.hero img { width: 112px; height: 112px; }
.hero h1 { font-size: 2.2em; line-height: 1.15; margin: 0.4em 0 0.3em; color: var(--ink); }
.hero p { max-width: 640px; margin: 0 auto; color: var(--muted); font-size: 1.08em; }
h2 { color: var(--ink); margin: 1.6em 0 0.6em; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.card { background: var(--card); border-radius: 20px; padding: 20px; box-shadow: 0 1px 2px rgb(0 0 0 / 0.05); display: flex; flex-direction: column; gap: 8px; }
.card img.icon { width: 64px; height: 64px; border-radius: 15px; }
.card h3 { margin: 4px 0 0; font-size: 1.2em; }
.card .tag { color: var(--primary); font-weight: 600; margin: 0; }
.card p { margin: 0; }
.card .go { margin-top: auto; padding-top: 8px; font-weight: 600; text-decoration: none; }
.badge { display: inline-block; background: var(--soft); color: var(--primary); border-radius: 999px; padding: 4px 12px; font-size: 0.85em; font-weight: 600; }
.principles { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px 24px; }
.principles h3 { margin: 0.6em 0 0.2em; font-size: 1.02em; }
.principles p { margin: 0; color: var(--muted); }
.app-hero { display: flex; gap: 20px; align-items: center; padding: 28px 0 8px; }
.app-hero img { width: 104px; height: 104px; border-radius: 24px; flex: none; }
.app-hero h1 { margin: 0; font-size: 2em; color: var(--ink); }
.app-hero p { margin: 0.2em 0 0; color: var(--primary); font-weight: 600; font-size: 1.1em; }
.features { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.features li { background: var(--card); border-radius: 14px; padding: 12px 16px; }
.links { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin: 16px 0; }
.langs { columns: 3 180px; list-style: none; padding: 0; }
.langs li { margin: 0.25em 0; }
footer { color: var(--muted); font-size: 0.9em; text-align: center; padding: 40px 0 48px; }
@media (max-width: 520px) { .hero h1 { font-size: 1.7em; } .app-hero { flex-direction: column; text-align: center; } }