:root {
  --bg: #ffffff;
  --bg-card: #f6f8fa;
  --bg-code: #f0f2f5;
  --accent: #2E6EB0;
  --accent-hover: #245a91;
  --text: #1a1a1a;
  --text-muted: #656d76;
  --text-dim: #8b949e;
  --border: #d8dee4;
  --radius: 12px;
  --max-width: 1100px;
}

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

html {
  scroll-behavior: smooth;
}

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);
}

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

/* Hero */

.hero {
  text-align: center;
  padding: 80px 0 60px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

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

.hero-tagline {
  font-size: 1.35rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-dim);
  margin-bottom: 36px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 56px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.2s, color 0.2s;
}

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

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

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

.btn-secondary:hover {
  border-color: var(--text-muted);
  color: var(--text);
}

/* Terminal frame */

.terminal {
  background: #0a0e14;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
  max-width: 800px;
  margin: 0 auto;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: #1a1e24;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #febc2e; }
.terminal-dot.green { background: #28c840; }

.terminal-title {
  flex: 1;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
}

.terminal img {
  display: block;
  width: 100%;
  height: auto;
}

/* About */

.about {
  padding: 0 0 40px;
}

.about-text {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Features */

.features {
  padding: 80px 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: var(--text-dim);
}

.feature-icon {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Showcase */

.showcase {
  padding: 80px 0;
}

.showcase-grid {
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.showcase-item {
  text-align: center;
}

.showcase-item h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-muted);
}

/* Install */

.install {
  padding: 80px 0;
}

.install-note {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 36px;
  font-size: 0.95rem;
}

.install-note a {
  font-weight: 600;
}

.install-methods {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 640px;
  margin: 0 auto;
}

.install-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.install-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-muted);
}

.code-block {
  position: relative;
  background: #1a1e24;
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
}

.code-block code {
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  font-size: 0.85rem;
  color: #e6edf3;
  white-space: pre;
}

.code-block .cmd {
  color: #7ee787;
}

.code-block .arg {
  color: #e6edf3;
}

.code-block .flag {
  color: #79c0ff;
}

.code-block .url {
  color: #d2a8ff;
}

.code-block .comment {
  color: #8b949e;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: #30363d;
  border: none;
  border-radius: 6px;
  color: #8b949e;
  cursor: pointer;
  padding: 4px 8px;
  font-size: 0.75rem;
  font-family: inherit;
  opacity: 0;
  transition: opacity 0.2s, background 0.2s;
}

.code-block:hover .copy-btn {
  opacity: 1;
}

.copy-btn:hover {
  background: #484f58;
  color: #e6edf3;
}

.install-card .note {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 8px;
}

/* Footer */

.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.footer-note {
  color: var(--text-dim);
  font-size: 0.8rem;
}

/* Responsive */

@media (max-width: 768px) {
  .hero {
    padding: 48px 0 40px;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-tagline {
    font-size: 1.1rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

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


  .features,
  .showcase,
  .install {
    padding: 48px 0;
  }
}