:root {
  --bg: #0b0b0e;
  --card: #18181b;
  --text: #eee;
  --muted: #888;
  --accent: #4f46e5;
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  line-height: 1.5;
}
main { max-width: 800px; margin: 0 auto; padding: 48px 24px; }
header h1 { font-size: 48px; margin: 0 0 8px; }
.tag { font-size: 20px; color: var(--muted); margin: 0 0 48px; }
.hero { margin-bottom: 48px; }
.screenshot { width: 100%; border-radius: 12px; border: 1px solid #333; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 48px; }
.feat { background: var(--card); border-radius: 12px; padding: 20px; }
.feat h3 { margin: 0 0 8px; font-size: 17px; }
.feat p { margin: 0; color: var(--muted); font-size: 14px; }
.buy { background: var(--card); border-radius: 16px; padding: 32px; text-align: center; margin-bottom: 48px; }
.price { font-size: 40px; font-weight: 700; margin-bottom: 24px; }
.price span { font-size: 15px; font-weight: 400; display: block; color: var(--muted); margin-top: 6px; }
button#buy-btn {
  background: var(--accent); color: white; border: none;
  padding: 14px 40px; border-radius: 8px; font-size: 17px;
  cursor: pointer; font-weight: 600;
}
button#buy-btn:hover { background: #6366f1; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
a { color: var(--accent); }
footer { text-align: center; color: var(--muted); font-size: 13px; margin-top: 64px; }
input[type=text], input[type=email] {
  background: var(--bg); color: var(--text); border: 1px solid #333;
  border-radius: 8px; padding: 12px 16px; font-size: 16px; width: 100%;
}