:root {
  --bg: #0f1115;
  --fg: #e6e6e6;
  --muted: #8a8f98;
  --accent: #7cf5c4;
  --accent-fg: #0f1115;
  --border: #1e222a;
  --card-bg: #14171d;
  --code-bg: #0a0c11;
  --code-fg: #a0ffa0;
  --code-comment: #555;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family:
    ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  line-height: 1.5;
}

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
}

.brand {
  color: var(--fg);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
}

section + section {
  margin-top: 4rem;
}

.hero {
  text-align: center;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  word-break: break-word;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: 2.25rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.lede {
  margin: 0 0 2rem;
  color: var(--muted);
  font-size: 1.1rem;
}

.buy-button {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 600;
  text-decoration: none;
  padding: 0.9rem 1.75rem;
  border-radius: 8px;
  font-size: 1.1rem;
  transition: transform 0.05s ease-in-out;
}

.buy-button:hover {
  transform: translateY(-1px);
}

.buy-button:active {
  transform: translateY(0);
}

.hint {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.features h2,
.gift h2 {
  margin: 0 0 1.5rem;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
}

.feature-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-grid li {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}

.feature-grid h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.feature-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.preview {
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

.preview-label {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.75rem;
}

.preview-code {
  background: var(--code-bg);
  color: var(--code-fg);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.8rem;
  padding: 1.25rem;
  border-radius: 8px;
  line-height: 1.7;
  margin: 0;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.preview-code .comment {
  color: var(--code-comment);
}

.tag-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-list li {
  font-size: 0.75rem;
  padding: 0.2rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--muted);
}

.gift {
  text-align: center;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 2rem 0;
}

.gift p {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.faq details {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

.faq details:first-child {
  border-top: 1px solid var(--border);
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1.05rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  color: var(--muted);
  font-weight: 400;
  font-size: 1.25rem;
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  margin: 0.75rem 0 0;
  color: var(--muted);
}

.closing {
  text-align: center;
}

.closing p {
  margin: 0 0 1.5rem;
  font-size: 1.1rem;
}

footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid var(--border);
}