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

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fa;
  --color-text: #1f2328;
  --color-text-secondary: #656d76;
  --color-border: #d0d7de;
  --color-primary: #4a90d9;
  --color-primary-hover: #357abd;
  --color-primary-text: #ffffff;
  --color-card-bg: #ffffff;
  --color-card-shadow: rgba(0, 0, 0, 0.08);
  --color-code-bg: #eff1f3;
  --color-footer-bg: #f6f8fa;
  --nav-height: 60px;
  --max-width: 960px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0d1117;
    --color-bg-alt: #161b22;
    --color-text: #e6edf3;
    --color-text-secondary: #8b949e;
    --color-border: #30363d;
    --color-primary: #58a6ff;
    --color-primary-hover: #79b8ff;
    --color-primary-text: #0d1117;
    --color-card-bg: #161b22;
    --color-card-shadow: rgba(0, 0, 0, 0.3);
    --color-code-bg: #21262d;
    --color-footer-bg: #161b22;
  }
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a:hover {
  text-decoration: underline;
}

/* ── Nav ── */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
}

.nav-inner {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: none;
}

.nav-brand:hover {
  text-decoration: none;
}

.nav-brand img {
  width: 28px;
  height: 28px;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--color-text);
  text-decoration: none;
}

/* ── Main content ── */

main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ── Hero ── */

.hero {
  text-align: center;
  padding: 4rem 0 3rem;
}

.hero-icon {
  width: 96px;
  height: 96px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.15s, transform 0.1s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

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

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

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

.btn-secondary:hover {
  background: var(--color-bg-alt);
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Features grid ── */

.features {
  padding: 3rem 0;
}

.features h2 {
  text-align: center;
  font-size: 1.75rem;
  margin-bottom: 2rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.5rem;
  transition: box-shadow 0.15s;
}

.feature-card:hover {
  box-shadow: 0 4px 12px var(--color-card-shadow);
}

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* ── Examples ── */

.examples {
  padding: 3rem 0;
}

.examples h2 {
  text-align: center;
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.examples-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto 2rem;
}

.examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
}

.example-card {
  display: flex;
  flex-direction: column;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
  transition: box-shadow 0.15s, transform 0.15s;
  color: var(--color-text);
  text-decoration: none;
}

.example-card:hover {
  box-shadow: 0 6px 20px var(--color-card-shadow);
  transform: translateY(-2px);
  text-decoration: none;
}

.example-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: top;
  display: block;
  border-bottom: 1px solid var(--color-border);
}

.example-info {
  flex: 1;
  padding: 1.25rem;
}

.example-info h3 {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}

.example-info p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* ── Docs / content pages ── */

.content {
  padding: 2rem 0;
}

.content h1 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.content h2 {
  font-size: 1.5rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--color-border);
}

.content h3 {
  font-size: 1.15rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.content p,
.content ul,
.content ol {
  margin-bottom: 1rem;
}

.content ul,
.content ol {
  padding-left: 1.5rem;
}

.content li {
  margin-bottom: 0.35rem;
}

.content code {
  font-family: "SF Mono", SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.875em;
  background: var(--color-code-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

.content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

.content th,
.content td {
  text-align: left;
  padding: 0.6rem 1rem;
  border: 1px solid var(--color-border);
}

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

.content blockquote {
  border-left: 4px solid var(--color-primary);
  padding: 0.5rem 1rem;
  margin: 1rem 0;
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
  border-radius: 0 6px 6px 0;
}

/* ── FAQ ── */

.faq-item {
  margin-bottom: 1.5rem;
}

.faq-item h3 {
  margin-bottom: 0.25rem;
}

/* ── Footer ── */

.footer {
  background: var(--color-footer-bg);
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  color: var(--color-text-secondary);
  font-size: 0.85rem;
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* ── Responsive ── */

@media (max-width: 640px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .hero .tagline {
    font-size: 1.05rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    gap: 1rem;
  }

  .nav-links a {
    font-size: 0.8rem;
  }

  .examples-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}