* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0f0f0f;
  color: #ffffff;
  min-height: 100vh;
}

.container {
  max-width: 720px;
  padding: 48px 24px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

.tagline {
  font-size: 1.2rem;
  color: #bdbdbd;
  line-height: 1.6;
}

.product {
  background: #1a1a1a;
  padding: 32px;
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.product h2 {
  font-size: 1.5rem;
}

.product p {
  color: #cfcfcf;
  line-height: 1.5;
}

.button {
  margin-top: 8px;
  align-self: flex-start;
  text-decoration: none;
  background: #ffffff;
  color: #0f0f0f;
  padding: 12px 20px;
  border-radius: 10px;
  font-weight: 600;
  transition: opacity 0.2s ease;
}

.button:hover {
  opacity: 0.85;
}

footer {
  margin-top: 40px;
  font-size: 0.9rem;
  color: #777;
}