:root {
  --bg: #ffffff;
  --fg: #1a1d23;
  --fg-muted: #5a6270;
  --accent: #1e6fd9;
  --accent-hover: #0f5ab8;
  --code-bg: #f4f6f9;
  --code-fg: #1a1d23;
  --border: #e2e6ec;
  --header-bg: #f9fafc;
  --footer-fg: #6b7280;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1218;
    --fg: #e8ecf2;
    --fg-muted: #9aa3b2;
    --accent: #5fafff;
    --accent-hover: #8cc4ff;
    --code-bg: #181c25;
    --code-fg: #e8ecf2;
    --border: #232834;
    --header-bg: #131720;
    --footer-fg: #8a93a3;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.site-header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  padding: 2.5rem 0 2rem;
  margin-bottom: 2rem;
}

.brand {
  font-size: 2.5rem;
  margin: 0 0 0.25rem;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0;
  color: var(--fg-muted);
  font-size: 1.05rem;
}

main section {
  margin-bottom: 2.75rem;
}

h2 {
  font-size: 1.6rem;
  margin: 0 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
  color: var(--accent);
}

h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.5rem;
  color: var(--fg);
}

p {
  margin: 0.5rem 0 1rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}

a:hover,
a:focus {
  color: var(--accent-hover);
  border-bottom-color: currentColor;
}

ul {
  padding-left: 1.4rem;
  margin: 0.5rem 0 1rem;
}

li {
  margin: 0.25rem 0;
}

ul.features li,
ul.contact li {
  margin: 0.4rem 0;
}

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

pre {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 0.9rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  overflow-x: auto;
  font-size: 0.95rem;
  line-height: 1.5;
}

pre code {
  background: transparent;
  border: none;
  padding: 0;
  font-size: inherit;
}

strong {
  color: var(--fg);
}

.site-footer {
  margin-top: 3rem;
  padding: 1.5rem 0 2rem;
  border-top: 1px solid var(--border);
  color: var(--footer-fg);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}