* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.6;
  color: #1a1a2e;
  background: #f8fafc;
}
.hero {
  padding: 4rem 1.5rem 3rem;
  text-align: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
}
.hero h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); margin-bottom: 0.75rem; }
.hero-subtitle { font-size: 1.125rem; opacity: 0.92; max-width: 640px; margin: 0 auto; }
.sections { max-width: 800px; margin: 0 auto; padding: 2.5rem 1.5rem; }
.section { margin-bottom: 2rem; }
.section h2 { font-size: 1.35rem; margin-bottom: 0.5rem; color: #334155; }
.section p { color: #475569; }
.cta { text-align: center; padding: 2rem 1.5rem 3rem; }
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  background: #667eea;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: background 0.2s;
}
.btn:hover { background: #5a67d8; }