:root {
  --accent: #34d399;      /* emerald-400 */
  --text:   #111827;      /* gray-900 */
  --bg:     #f9fafb;      /* gray-50 */
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 4rem 1.5rem;
  line-height: 1.6;
}
header { text-align: center; margin-bottom: 2.5rem; }
h1 { font-size: 2.5rem; margin-bottom: 0.5rem; }
.tagline { font-size: 1.125rem; color: #4b5563; }
.hero-img {
  width: 220px;
  max-width: 90%;
  border-radius: 28px;
  box-shadow: 0 10px 30px rgba(0,0,0,.08);
  margin-bottom: 2rem;
}
.features {
  max-width: 600px;
  margin-bottom: 2.5rem;
  list-style: none;
}
.features li {
  background: white;
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
  font-size: 1rem;
}
.features li strong { color: var(--accent); }
.cta {
  display: inline-block;
  background: var(--accent);
  color: white;
  font-size: 1.125rem;
  font-weight: 600;
  padding: 0.875rem 2.25rem;
  border-radius: 9999px;
  text-decoration: none;
  transition: transform .2s;
}
.cta:hover { transform: translateY(-2px); }
footer {
  margin-top: 4rem;
  font-size: 0.875rem;
  color: #9ca3af;
}