:root {
  --bg: #0f131c;
  --card: #171d2a;
  --line: rgba(255, 255, 255, 0.09);
  --text: #e8eef7;
  --muted: #9aa8bd;
  --accent: #4fd6ff;
  --accent-ink: #0a1a22;
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 50% -10%, #1d2b55 0%, rgba(15, 19, 28, 0) 60%), var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Avenir Next", "Segoe UI", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 16px 64px;
}

.hero { text-align: center; padding: 24px 0 8px; }
.hero .icon { width: 112px; height: 112px; border-radius: 26px; box-shadow: 0 12px 40px rgba(79, 214, 255, 0.25); }
.hero .logo { display: block; width: min(520px, 100%); height: auto; margin: 24px auto 8px; }
.tagline { font-size: 21px; color: var(--text); margin: 8px auto 4px; max-width: 34ch; }

h1 { font-size: 34px; line-height: 1.2; margin: 8px 0; }
h2 { font-size: 20px; margin: 32px 0 8px; }
h2:first-child { margin-top: 0; }
p, li { color: var(--muted); }
.lede { color: var(--text); font-size: 19px; }
.meta { font-size: 14px; color: var(--muted); }

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

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px 24px;
  margin-top: 24px;
}

.features { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); margin-top: 24px; }
.features div { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 18px; }
.features b { display: block; color: var(--text); margin-bottom: 4px; }
.features span { color: var(--muted); font-size: 15px; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.button {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  text-decoration: none;
}
.button.secondary { background: transparent; color: var(--text); border: 1px solid var(--line); }

footer { margin-top: 40px; text-align: center; font-size: 14px; color: var(--muted); }
footer a { color: var(--muted); }

@media (max-width: 480px) {
  main { padding-top: 32px; }
  h1 { font-size: 28px; }
  .card { padding: 22px 18px; }
}