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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f9f9f7;
  color: #1a1a1a;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.hero {
  text-align: center;
  max-width: 480px;
  width: 100%;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.tagline {
  color: #555;
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
  line-height: 1.5;
}

.product-card {
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.product-details {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.75rem;
}

.product-name {
  font-weight: 600;
  font-size: 1.1rem;
}

.product-price {
  font-weight: 700;
  font-size: 1.25rem;
  color: #1a1a1a;
}

.product-description {
  color: #666;
  font-size: 0.95rem;
  margin-bottom: 1.75rem;
  line-height: 1.5;
}

.button-group {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.buy-button {
  width: 100%;
  padding: 0.85rem 1.5rem;
  background: #1a1a1a;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.buy-button:hover {
  background: #333;
}

.buy-button:active {
  transform: scale(0.98);
}

.buy-button.monthly {
  background: #1a6fd4;
  color: #fff;
  border: none;
}

.buy-button.monthly:hover {
  background: #1559aa;
}

.buy-button.yearly {
  background: #d41a1a;
  color: #fff;
  border: none;
}

.buy-button.yearly:hover {
  background: #aa1515;
}

.product-card + .product-card {
  margin-top: 1.5rem;
}

footer {
  text-align: center;
  padding: 1.5rem;
  color: #aaa;
  font-size: 0.85rem;
}