body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
  background-color: #f9f9f9;
  color: #333;
}

header {
  padding: 0px 0px 10px;
  background-color: #ff6f00;
  color: #ffffff;
}

.app-icon {
  width: 80px;
  height: auto;
  margin-bottom: 10px;
}

h1 {
  font-size: 24px;
  margin: 0px 0 0px 0;
  color: #ffffff;
}

.description {
  max-width: 600px;
  margin: 20px auto;
  font-size: 16px;
  line-height: 1.5;
  padding: 0 15px;
}

.description ul {
  list-style-position: outside;
  padding-left: 20px;
  margin-top: 0.5em;
  margin-bottom: 1em;
  text-align: left;
}

.description li {
  margin-bottom: 0.5em;
  line-height: 1.6;
}

.app-store-link img {
  width: 160px;
  margin: 20px auto;
}

.preview img {
  max-width: 350px;
  width: 90%;
  border-radius: 10px;
  margin-top: 30px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

footer {
  margin-top: 40px;
  padding: 20px;
  font-size: 14px;
  background-color: #ffffff;
  color: #999;
}

.top-nav ul {
  list-style: none;
  margin: 0;
  padding: 5px 0 0 0;
  text-align: right;
}

.top-nav li {
	  display: inline-block;
      margin-left: auto;
      margin-right: 20px;
}

.top-nav a {
  text-decoration: none;
  color: white;
  font-weight: normal;
  font-family: sans-serif;
  font-size: 14px;
}



section {
  display: flex;
  flex-direction: column;
  align-items: center;
}

section > * {
  max-width: 600px;
  text-align: left;
  width: 100%;
}