:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
  --green: #3fb950;
  --purple: #bc8cff;
  --orange: #f0883e;
  --red: #f85149;
  --code-bg: #0d1117;
}

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

.github-btn {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 100;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* Hero */
.hero {
  text-align: center;
  padding: 5rem 2rem 4rem;
  background: linear-gradient(180deg, #0d1117 0%, #161b22 100%);
  border-bottom: 1px solid var(--border);
}

.hero-logo {
  width: 96px;
  height: 96px;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.3rem;
}

.accent { color: var(--accent); }
.hero h1 .accent { color: var(--accent); }

.version {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0.5rem auto 0;
}

.hero .badges {
  margin-top: 1.8rem;
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  border-radius: 2rem;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--bg);
}
.badge.green  { color: var(--green);  border-color: #238636; }
.badge.blue   { color: var(--accent); border-color: #1f6feb; }
.badge.purple { color: var(--purple); border-color: #8957e5; }
.badge.orange { color: var(--orange); border-color: #bd561d; }

.ai-note {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
}

.ai-note a.ai-link {
  color: var(--accent);
  text-decoration: none;
  font-style: normal;
  font-weight: 600;
}

.ai-note a.ai-link:hover {
  text-decoration: underline;
}

/* Container */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

section { margin-bottom: 3.5rem; }

section h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

section p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  max-width: 720px;
}

/* Code blocks */
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem 1.2rem;
  overflow-x: auto;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.88rem;
  line-height: 1.55;
  margin-bottom: 1.2rem;
}

code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.88rem;
}

.kw { color: var(--purple); }
.fn { color: var(--accent); }
.str { color: var(--green); }
.cm { color: var(--text-muted); }
.num { color: var(--orange); }

/* Feature grid */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.2rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.4rem;
}

.feature-card h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0;
}

.feature-icon {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

/* App showcase */
.apps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.app-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.2rem;
  text-align: center;
}

.app-card .icon { font-size: 2rem; margin-bottom: 0.5rem; }
.app-card h3 { font-size: 0.95rem; margin-bottom: 0.3rem; }
.app-card p { font-size: 0.82rem; color: var(--text-muted); margin: 0; }

/* Pipeline */
.pipeline {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.85rem;
}

.pipeline .stage {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.8rem;
}

.pipeline .arrow { color: var(--text-muted); }

/* Stats */
.stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin: 1.5rem 0;
}

.stat { text-align: center; }
.stat .number { font-size: 2rem; font-weight: 800; color: var(--accent); }
.stat .label { font-size: 0.82rem; color: var(--text-muted); }
.stat .detail {
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.7;
  margin-top: 0.2rem;
  max-width: 140px;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
}

footer .copyright {
  margin-top: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

footer .license {
  margin-top: 0.25rem;
}

/* Quick start */
.quickstart {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
}

.quickstart h3 {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}