:root {
  --bg: #f5f5f5;
  --surface: #ffffff;
  --text: #242424;
  --muted: #616161;
  --border: #e0e0e0;
  --accent: #0f6cbd;
  --hero-bg: #0f6cbd;
  --hero-text: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1f1f1f;
    --surface: #292929;
    --text: #f0f0f0;
    --muted: #adadad;
    --border: #3d3d3d;
    --accent: #479ef5;
    --hero-bg: #0c3b5e;
    --hero-text: #ffffff;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 16px;
}

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

.hero {
  background: var(--hero-bg);
  color: var(--hero-text);
  padding: 48px 0 56px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.75rem;
  font-weight: 600;
}

.brand img {
  border-radius: 9px;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.35);
}

.hero h1 {
  margin: 20px 0 0;
  font-size: clamp(1.4rem, 4vw, 2.1rem);
  font-weight: 400;
  line-height: 1.3;
  max-width: 34ch;
}

main { padding-top: 40px; padding-bottom: 24px; }

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 16px;
}

section { margin-bottom: 40px; }

.features {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}

.features li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: 14px 16px;
}

.features strong {
  display: block;
  margin-bottom: 4px;
}

.features span {
  color: var(--muted);
  font-size: 0.95rem;
}

.note {
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  padding: 20px 0 28px;
}