:root {
  --bg: #f9fafb;
  --surface: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --border: #e5e7eb;
  --primary: #2563eb;
  --primary-soft: #eff6ff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f17;
    --surface: #151b26;
    --text: #f3f4f6;
    --muted: #9ca3af;
    --border: #273041;
    --primary: #60a5fa;
    --primary-soft: #172554;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

a {
  color: var(--primary);
}

header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.bar {
  max-width: 760px;
  margin: 0 auto;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.bar a.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 19px;
  text-decoration: none;
}

.bar img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
}

.bar nav {
  margin-left: auto;
  display: flex;
  gap: 16px;
  font-size: 15px;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

h1 {
  font-size: 34px;
  line-height: 1.2;
  margin: 0 0 12px;
}

h2 {
  font-size: 23px;
  margin: 40px 0 8px;
}

h3 {
  font-size: 18px;
  margin: 24px 0 4px;
}

p.lead {
  font-size: 20px;
  color: var(--muted);
}

.hero {
  text-align: center;
  padding: 24px 0 8px;
}

.hero img {
  width: 112px;
  height: 112px;
  border-radius: 26px;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 32px 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
}

.card h3 {
  margin-top: 0;
}

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

.lang {
  display: inline-block;
  background: var(--primary-soft);
  border-radius: 999px;
  padding: 2px 12px;
  font-size: 14px;
  font-weight: 600;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 56px 0;
}

footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 16px 40px;
  color: var(--muted);
  font-size: 14px;
}