/* ── Variables ── */
:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-card: #161b22;
  --border: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --accent-blue: #58a6ff;
  --accent-green: #3fb950;
  --accent-orange: #d29922;
  --accent-red: #f85149;
  --accent-purple: #bc8cff;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --max-width: 1100px;
  --nav-height: 56px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a:hover {
  text-decoration: underline;
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.navbar-inner {
  width: 100%;
  max-width: var(--max-width);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.navbar-links svg {
  display: block;
}

.navbar-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: color 0.2s;
}

.navbar-links a:hover,
.navbar-links a.active {
  color: var(--text-primary);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 4px;
}

/* ── Sections ── */
section {
  padding: 80px 24px;
}

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

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: 48px;
}

.section-warning {
  color: #ff4d4d;
  font-size: 0.95rem;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: 32px;
  padding: 12px 16px;
  border: 1px solid #ff4d4d;
  border-radius: 6px;
  background: rgba(255, 77, 77, 0.08);
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: var(--nav-height);
}

.hero-ascii {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.3;
  color: var(--accent-blue);
  margin-bottom: 24px;
  white-space: pre;
  display: inline-block;
  text-align: left;
}

.hero-tagline {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.hero-description {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: 40px;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

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

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: opacity 0.2s, transform 0.15s;
  text-decoration: none;
}

.btn:hover {
  opacity: 0.9;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent-blue);
  color: var(--bg-primary);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

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

/* ── Feature cards ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-2px);
}

.feature-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  color: var(--accent-blue);
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.925rem;
  line-height: 1.5;
}

/* ── Installation ── */
.install-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.install-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  min-width: 0;
  overflow: hidden;
}

.install-panel h3 {
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.install-panel p {
  color: var(--text-secondary);
  font-size: 0.925rem;
  margin-bottom: 16px;
}

.platform-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.platform-table th,
.platform-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.platform-table th {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.platform-table td code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-green);
}

/* ── Code blocks ── */
.code-block {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 16px;
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: rgba(48, 54, 61, 0.4);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.code-block pre {
  padding: 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  margin: 0;
}

.copy-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.75rem;
  font-family: var(--font-sans);
  transition: color 0.2s, border-color 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

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

.copy-btn.copied {
  color: var(--accent-green);
  border-color: var(--accent-green);
}

/* Syntax highlighting */
.token-comment { color: var(--text-secondary); }
.token-keyword { color: var(--accent-purple); }
.token-string { color: var(--accent-green); }
.token-command { color: var(--accent-blue); }
.token-flag { color: var(--accent-orange); }
.token-url { color: var(--accent-green); }
.token-prompt { color: var(--text-secondary); user-select: none; }
.token-key { color: var(--accent-blue); }
.token-value { color: var(--accent-green); }
.token-label { color: var(--text-secondary); }
.token-status { color: var(--accent-green); font-weight: 600; }

/* ── Quick Start ── */
.quickstart-blocks {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.quickstart-blocks p {
  color: var(--text-secondary);
  margin-bottom: 4px;
}

/* ── Examples ── */
.examples-blocks {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.example-item h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

/* ── MCP section ── */
.mcp-intro {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 32px;
  max-width: 740px;
}

.mcp-intro a {
  color: var(--accent-blue);
}

.tools-table-wrapper {
  overflow-x: auto;
  margin-bottom: 32px;
}

.tools-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.925rem;
}

.tools-table th,
.tools-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.tools-table th {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--bg-secondary);
}

.tools-table td code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-green);
}

.mcp-config-label {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

/* ── MCP examples ── */
.mcp-examples-blocks {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.mcp-example-item h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

/* Claude Code terminal styling */
.claude-terminal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
}

.claude-terminal-header {
  padding: 12px 16px;
  background: rgba(48, 54, 61, 0.4);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.claude-terminal-body {
  padding: 16px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.ct-prompt {
  color: var(--accent-green);
  font-weight: 700;
}

.ct-user-input {
  color: var(--text-primary);
  font-weight: 600;
}

.ct-tool-call {
  color: var(--accent-blue);
}

.ct-tool-badge {
  color: var(--accent-purple);
  font-size: 0.8rem;
}

.ct-collapsed {
  color: var(--text-secondary);
  font-style: italic;
}

.ct-response {
  color: var(--text-primary);
}

.ct-dim {
  color: var(--text-secondary);
}

.ct-table {
  color: var(--text-secondary);
}

.ct-success {
  color: var(--accent-green);
}

.ct-heading {
  color: var(--text-primary);
  font-weight: 600;
}

.ct-separator {
  color: var(--border);
}

/* ── Footer / CTA ── */
.footer-cta {
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}

.footer-cta h2 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.footer-cta p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

.footer-meta {
  margin-top: 48px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.footer-meta a {
  color: var(--text-secondary);
}

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

/* ── Back to top ── */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-blue);
  color: var(--bg-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s, transform 0.15s;
  z-index: 50;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-2px);
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 700px) {
  .navbar-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 16px 24px;
    gap: 12px;
    border-bottom: 1px solid var(--border);
  }

  .navbar-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

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

  .hero-ascii {
    font-size: 0.55rem;
  }

  .hero-tagline {
    font-size: 1.2rem;
  }

  section {
    padding: 60px 16px;
  }

  .section-title {
    font-size: 1.6rem;
  }
}