:root {
  --bg: #0f1115;
  --panel: #171a21;
  --border: #262b36;
  --text: #e6e9ef;
  --muted: #8b93a4;
  --accent: #5b8cff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.nav, footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  max-width: 960px;
  margin: 0 auto;
}
.nav nav a, footer nav a { margin-left: 1.25rem; }
.brand { font-weight: 700; font-size: 1.1rem; }

.cta {
  background: var(--accent);
  color: #fff !important;
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
}
.cta:hover { text-decoration: none; opacity: 0.92; }
.cta.large { display: inline-block; padding: 0.75rem 1.4rem; font-size: 1.05rem; }

main { max-width: 960px; margin: 0 auto; padding: 1.5rem; }
.hero { padding: 4rem 0 3rem; text-align: center; }
.hero h1 { font-size: clamp(1.8rem, 5vw, 2.8rem); margin: 0 0 1rem; }
.hero p { color: var(--muted); max-width: 620px; margin: 0 auto 2rem; font-size: 1.1rem; }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  padding: 2rem 0 4rem;
}
.features article {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}
.features h3 { margin-top: 0; }
.features p { color: var(--muted); margin-bottom: 0; }

footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  margin-top: 2rem;
}

.doc { max-width: 720px; margin: 0 auto; padding: 2.5rem 1.5rem; }
.doc h1 { margin-top: 0; }
.doc h2 { margin-top: 2rem; }