:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fa;
  --color-border: #d0d7de;
  --color-text: #1f2328;
  --color-text-muted: #656d76;
  --color-primary: #0969da;
  --color-primary-hover: #0550ae;
  --color-success: #1a7f37;
  --color-success-bg: #dafbe1;
  --color-warning: #9a6700;
  --color-warning-bg: #fff8c5;
  --color-danger: #cf222e;
  --color-danger-bg: #ffebe9;
  --color-info: #0969da;
  --color-info-bg: #ddf4ff;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --max-width: 900px;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
  margin-bottom: 40px;
  background: var(--color-bg-alt);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.site-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 14px;
  padding: 4px 10px;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}

.site-nav a:hover {
  background: var(--color-border);
  color: var(--color-text);
}

.site-nav a.active {
  background: var(--color-primary);
  color: #fff;
}

/* Main content */
main {
  padding-bottom: 80px;
}

main h1 {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.25;
}

main h2 {
  font-size: 24px;
  font-weight: 600;
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

main h3 {
  font-size: 20px;
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 12px;
}

main h4 {
  font-size: 16px;
  font-weight: 600;
  margin-top: 20px;
  margin-bottom: 8px;
}

main p {
  margin-bottom: 16px;
}

main ul, main ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

main li {
  margin-bottom: 4px;
}

main a {
  color: var(--color-primary);
  text-decoration: none;
}

main a:hover {
  text-decoration: underline;
}

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 85%;
  background: var(--color-bg-alt);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-border);
}

pre {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 16px;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 14px;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
}

th, td {
  text-align: left;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
}

th {
  background: var(--color-bg-alt);
  font-weight: 600;
}

/* Callouts */
.callout {
  padding: 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  border-left: 4px solid;
}

.callout-info {
  background: var(--color-info-bg);
  border-color: var(--color-info);
}

.callout-success {
  background: var(--color-success-bg);
  border-color: var(--color-success);
}

.callout-warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning);
}

.callout-danger {
  background: var(--color-danger-bg);
  border-color: var(--color-danger);
}

/* Lead text */
.lead {
  font-size: 18px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

/* Cards grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 20px;
  background: var(--color-bg);
}

.card h3 {
  margin-top: 0;
  font-size: 16px;
}

.card p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

/* Badges */
.badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 12px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.badge-free { background: var(--color-success-bg); color: var(--color-success); border-color: var(--color-success); }
.badge-pro { background: var(--color-info-bg); color: var(--color-info); border-color: var(--color-info); }
.badge-business { background: var(--color-warning-bg); color: var(--color-warning); border-color: var(--color-warning); }

/* Pricing table */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.pricing-card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 24px;
  text-align: center;
}

.pricing-card.featured {
  border-color: var(--color-primary);
  border-width: 2px;
  position: relative;
}

.pricing-card .price {
  font-size: 36px;
  font-weight: 700;
  margin: 12px 0 4px;
}

.pricing-card .price-period {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.pricing-card ul {
  text-align: left;
  list-style: none;
  padding: 0;
}

.pricing-card li {
  padding: 6px 0;
  font-size: 14px;
  border-bottom: 1px solid var(--color-bg-alt);
}

.pricing-card li::before {
  content: "✓ ";
  color: var(--color-success);
  font-weight: 600;
}

/* Hero */
.hero {
  text-align: center;
  padding: 40px 0;
  margin-bottom: 32px;
}

.hero h1 {
  font-size: 40px;
  margin-bottom: 16px;
}

.hero .lead {
  font-size: 20px;
  max-width: 600px;
  margin: 0 auto 24px;
}

.hero-links {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-links a {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 500;
  font-size: 14px;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  text-decoration: none;
}

.btn-secondary {
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-bg-alt);
  text-decoration: none;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  margin-top: 40px;
}

.site-footer p {
  font-size: 14px;
  color: var(--color-text-muted);
  text-align: center;
}

/* Responsive */
@media (max-width: 600px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero h1 {
    font-size: 28px;
  }

  main h1 {
    font-size: 24px;
  }

  main h2 {
    font-size: 20px;
  }
}