body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  margin: 0;
  padding: 0;
  background: #fff url('grid.png') repeat;
  text-align: center;
  color: #333;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem;
}

.logo {
  max-width: 160px;
  margin-bottom: 1rem;
}

h1, h2 {
  font-weight: 700;
}

h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: 1.2rem;
  color: #555;
  margin-bottom: 2rem;
}

section {
  padding: 2rem 0;
  border-top: 1px solid #ddd;
}

.features ul {
  list-style: none;
  padding: 0;
}

.features li {
  margin: 0.5rem 0;
  font-size: 1.1rem;
}

.cta-buttons .btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  margin: 0 0.5rem;
  font-size: 1rem;
  text-decoration: none;
  border-radius: 6px;
}

.app-store {
  background-color: #000;
  color: #fff;
}

.demo {
  background-color: #eee;
  color: #333;
}

.testimonials blockquote {
  font-style: italic;
  margin: 1rem auto;
  max-width: 600px;
}

.footer {
  border-top: 1px solid #ddd;
  padding-top: 1rem;
  font-size: 0.9rem;
  color: #777;
}

.feedback-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #007aff;
  color: white;
  border: none;
  padding: 12px 16px;
  border-radius: 50px;
  font-size: 16px;
  cursor: pointer;
  z-index: 1000;
}

.feedback-modal {
  display: none;
  position: fixed;
  bottom: 80px;
  right: 20px;
  background: white;
  border: 1px solid #ccc;
  padding: 1rem;
  width: 280px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  z-index: 1001;
}

.feedback-modal h3 {
  margin-top: 0;
}

.feedback-modal input,
.feedback-modal textarea {
  width: 100%;
  padding: 6px;
  margin: 4px 0;
  font-size: 14px;
}

.app-icon {
  width: 100px;
  height: auto;
  margin: 1rem auto;
  display: block;
}