:root { color-scheme: dark; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: #0b0d10;
  color: #e8e8e6;
  min-height: 100vh;
  padding: 64px 24px;
}

.page {
  max-width: 720px;
  margin: 0 auto;
}

.center-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 128px);
}

.card {
  max-width: 440px;
  width: 100%;
}

h1 {
  font-size: 1.75rem;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}

p.tagline {
  color: #9a9a94;
  margin: 0 0 32px;
  line-height: 1.5;
}

label {
  display: block;
  font-size: 0.85rem;
  color: #9a9a94;
  margin-bottom: 6px;
}

input[type="number"] {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 14px;
  font-size: 1.1rem;
  background: #16191d;
  border: 1px solid #2a2e34;
  border-radius: 8px;
  color: #e8e8e6;
  margin-bottom: 20px;
}

.price {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 24px;
}

button {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  font-weight: 600;
  background: #e8e8e6;
  color: #0b0d10;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: default;
}

.note {
  margin-top: 16px;
  font-size: 0.8rem;
  color: #6f6f6a;
  line-height: 1.5;
}

.error {
  margin-top: 12px;
  font-size: 0.85rem;
  color: #e2867a;
  display: none;
}

a {
  color: #e8e8e6;
}

.examples {
  margin-top: 72px;
  padding-top: 40px;
  border-top: 1px solid #1c2026;
}

.examples h2 {
  font-size: 1.1rem;
  margin: 0 0 8px;
}

.examples .disclosure {
  font-size: 0.8rem;
  color: #6f6f6a;
  line-height: 1.6;
  max-width: 560px;
  margin: 0 0 28px;
}

.example-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

@media (max-width: 560px) {
  .example-grid {
    grid-template-columns: 1fr;
  }
}

.example-card {
  display: block;
  border: 1px solid #1c2026;
  border-radius: 10px;
  overflow: hidden;
  text-decoration: none;
  background: #101317;
}

.example-card img {
  width: 100%;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #16191d;
}

.example-card .example-label {
  padding: 12px 14px;
  font-size: 0.85rem;
  color: #e8e8e6;
}

.example-card .example-label span {
  display: block;
  font-size: 0.75rem;
  color: #6f6f6a;
  margin-top: 2px;
}

footer {
  margin-top: 72px;
  padding-top: 32px;
  border-top: 1px solid #1c2026;
  text-align: center;
  color: #6f6f6a;
  font-size: 0.85rem;
  line-height: 2;
}

footer a {
  color: #9a9a94;
}

footer .guarantee {
  color: #555;
}