:root {
  --bg: #0a0a0a;
  --bg-card: #131313;
  --fg: #f5f5f5;
  --fg-dim: #a3a3a3;
  --fg-muted: #6b7280;
  --accent: #ff6b35;
  --accent-dim: #cc5429;
  --border: #262626;
  --border-soft: #1f1f1f;
  --code-bg: #1a1a1a;
  --success: #10b981;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  max-width: 760px;
  margin: 0 auto;
}
nav .brand { font-weight: 600; color: var(--fg); text-decoration: none; }
nav .brand .accent { color: var(--accent); }
nav ul { list-style: none; display: flex; gap: 24px; }
nav a { color: var(--fg-dim); text-decoration: none; font-size: 14px; }
nav a:hover { color: var(--fg); }

h1 {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
h1 .accent { color: var(--accent); }

h2 {
  font-size: 24px;
  font-weight: 600;
  margin-top: 56px;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 18px;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--fg);
}

p { margin-bottom: 16px; color: var(--fg-dim); }
p.lede { font-size: 19px; line-height: 1.55; color: var(--fg); margin-bottom: 28px; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dim); text-decoration: underline; }

.badge {
  display: inline-block;
  font-size: 12px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--fg-dim);
  margin-bottom: 24px;
  font-family: ui-monospace, SFMono-Regular, monospace;
}
.badge .dot { color: var(--accent); }

.primitives {
  list-style: none;
  margin: 24px 0;
}
.primitives li {
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 10px;
}
.primitives strong { color: var(--accent); font-weight: 600; }
.primitives p { margin: 4px 0 0; font-size: 14px; }

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 32px;
  margin-bottom: 24px;
}
.cta {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid var(--border);
  color: var(--fg);
}
.cta.primary { background: var(--accent); color: #0a0a0a; border-color: var(--accent); }
.cta.primary:hover { background: var(--accent-dim); border-color: var(--accent-dim); text-decoration: none; }
.cta:hover { border-color: var(--fg-muted); text-decoration: none; }

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", monospace;
  font-size: 13px;
  line-height: 1.5;
  color: var(--fg);
  margin: 16px 0 0;
}
code {
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 0.9em;
  color: var(--accent);
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 3px;
}
pre code { background: none; padding: 0; color: var(--fg); font-size: 13px; }

footer {
  border-top: 1px solid var(--border);
  margin-top: 96px;
  padding: 32px 24px;
  text-align: center;
  color: var(--fg-dim);
  font-size: 13px;
}
footer a { color: var(--fg-dim); }

.prompt-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px;
  margin: 16px 0;
}
.prompt-block h3 { margin-top: 0; }
.prompt-block .prompt-meta {
  font-size: 13px;
  color: var(--fg-dim);
  margin-bottom: 12px;
  font-family: ui-monospace, SFMono-Regular, monospace;
}

.code-wrap {
  position: relative;
  margin-top: 12px;
}
.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--fg-dim);
  padding: 5px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  font-family: -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  transition: color 120ms, border-color 120ms;
  z-index: 1;
}
.copy-btn:hover {
  color: var(--fg);
  border-color: var(--fg-muted);
}
.copy-btn.copied {
  color: var(--success);
  border-color: var(--success);
}
.code-wrap pre { margin-top: 0; }

.roi-callout {
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-left-width: 3px;
  border-radius: 6px;
  padding: 16px 20px;
  margin: 16px 0;
  font-size: 14px;
  color: var(--fg);
}
.roi-callout strong { color: var(--accent); }

@media (max-width: 600px) {
  h1 { font-size: 32px; }
  .container { padding: 40px 16px 64px; }
  nav { padding: 16px; }
  nav ul { gap: 16px; }
}