/* Chat Agent Relay website — CLI Geek Theme */
:root {
  --bg: #0d1117;
  --bg-elevated: #161b22;
  --bg-card: #1c2129;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --text-dim: #6e7681;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
  --green: #3fb950;
  --green-dim: #238636;
  --red: #f85149;
  --yellow: #d29922;
  --purple: #bc8cff;
  --mono: "JetBrains Mono", "Fira Code", "Cascadia Code", "SF Mono", "Consolas", monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --radius: 8px;
  --max-w: 960px;
}

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

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

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--accent-hover); }

img { max-width: 100%; }

/* Layout */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.wide-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}
.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.5px;
}
.nav-brand .prompt { color: var(--green); }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.15s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-cta {
  background: var(--accent);
  color: var(--bg) !important;
  padding: 6px 16px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.8125rem;
  transition: background 0.15s;
}
.nav-cta:hover { background: var(--accent-hover); color: var(--bg) !important; }

/* Mobile nav */
.nav-toggle { display: none; background: none; border: none; color: var(--text); cursor: pointer; font-size: 1.5rem; }
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 16px 24px;
    gap: 16px;
  }
  .nav-links.open { display: flex; }
}

/* Hero */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}
.hero-tag {
  display: inline-block;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 14px;
  font-size: 0.8125rem;
  font-family: var(--mono);
  color: var(--text-muted);
  margin-bottom: 24px;
}
.hero h1 {
  font-family: var(--mono);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero h1 .accent { color: var(--accent); }
.hero h1 .green { color: var(--green); }
.hero-sub {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.6;
}
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: all 0.15s;
  border: none;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { background: var(--accent-hover); color: var(--bg); }
.btn-secondary { background: var(--bg-elevated); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--text-muted); }

/* Terminal block */
.terminal {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-align: left;
  margin: 40px auto 0;
  max-width: 640px;
}
.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}
.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.terminal-dot.red { background: var(--red); }
.terminal-dot.yellow { background: var(--yellow); }
.terminal-dot.green { background: var(--green); }
.terminal-title {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-left: 8px;
}
.terminal-body {
  padding: 16px 20px;
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--text-muted);
  overflow-x: auto;
}
.terminal-body .prompt-char { color: var(--green); }
.terminal-body .cmd { color: var(--text); }
.terminal-body .comment { color: var(--text-dim); }
.terminal-body .output { color: var(--text-muted); }

/* Sections */
section { padding: 80px 0; }
section:nth-child(even) { background: var(--bg-elevated); }

.section-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.section-desc {
  color: var(--text-muted);
  max-width: 640px;
  margin-bottom: 40px;
  font-size: 1.05rem;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s;
}
.feature-card:hover { border-color: var(--accent); }
.feature-card h3 {
  font-family: var(--mono);
  font-size: 0.9375rem;
  margin-bottom: 8px;
  color: var(--text);
}
.feature-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
}
.feature-icon {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--green);
  margin-bottom: 12px;
}

/* Event chain */
.event-chain {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  font-family: var(--mono);
  font-size: 0.8125rem;
  max-width: 720px;
  margin: 0 auto;
  overflow-x: auto;
}
.event-chain .event-line {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
}
.event-chain .event-num {
  color: var(--text-dim);
  min-width: 20px;
  text-align: right;
}
.event-chain .event-name { color: var(--accent); }
.event-chain .event-desc { color: var(--text-muted); }
.event-chain .event-arrow { color: var(--green); }
.event-chain .event-blocked { color: var(--red); }

/* Comparison table */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.compare-table th, .compare-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.compare-table th {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  background: var(--bg-card);
}
.compare-table td { color: var(--text-muted); }
.compare-table .check { color: var(--green); font-weight: 700; }
.compare-table .cross { color: var(--red); }
.compare-table .partial { color: var(--yellow); }
.compare-table .highlight { color: var(--text); font-weight: 600; }

/* CTA banner */
.cta-banner {
  text-align: center;
  padding: 80px 0;
}
.cta-banner h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-banner p {
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-dim);
}
.footer-links {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 16px;
}
.footer-links a { color: var(--text-muted); }
.footer-links a:hover { color: var(--text); }

/* Blog */
.blog-list { display: flex; flex-direction: column; gap: 24px; }
.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s;
}
.blog-card:hover { border-color: var(--accent); }
.blog-card h3 { margin-bottom: 8px; }
.blog-card h3 a { color: var(--text); }
.blog-card h3 a:hover { color: var(--accent); }
.blog-card .meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 8px;
}
.blog-card p { font-size: 0.875rem; color: var(--text-muted); }

/* Article */
.article { max-width: 720px; margin: 0 auto; padding: 60px 24px; }
.article h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}
.article .meta {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--text-dim);
  margin-bottom: 32px;
}
.article h2 { font-size: 1.375rem; margin: 40px 0 16px; }
.article h3 { font-size: 1.125rem; margin: 32px 0 12px; }
.article p { margin-bottom: 16px; color: var(--text-muted); }
.article ul, .article ol { margin: 0 0 16px 24px; color: var(--text-muted); }
.article li { margin-bottom: 8px; }
.article code {
  font-family: var(--mono);
  background: var(--bg-elevated);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.875em;
}
.article pre {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 16px;
  overflow-x: auto;
}
.article pre code { background: none; padding: 0; font-size: 0.8125rem; line-height: 1.7; }
.article blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 16px;
  margin: 16px 0;
  color: var(--text-muted);
  font-style: italic;
}
.article strong { color: var(--text); }

/* Responsive */
@media (max-width: 600px) {
  .hero { padding: 48px 0 36px; }
  section { padding: 48px 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .terminal { margin: 24px auto 0; }
}

/* Typing animation */
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
.cursor-blink { animation: blink 1s step-end infinite; color: var(--green); }

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Use case tags */
.use-case-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.use-case-tag {
  font-family: var(--mono);
  font-size: 0.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 14px;
  color: var(--text-muted);
}

/* Share buttons */
.share-row { display: flex; gap: 12px; justify-content: center; margin-top: 24px; }
.share-btn {
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 6px 14px;
  border-radius: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}
.share-btn:hover { border-color: var(--accent); color: var(--accent); }