/* Typography */
:root {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #21262d;
  --fg: #e6edf3;
  --muted: #7d8590;
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.12);
  --red: #ff7b72;
  --green: #3fb950;
  --yellow: #d29922;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'Space Grotesk', sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
}

.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.topbar-links {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Hero */
.hero {
  padding: 80px 24px 100px;
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 4px;
  padding: 4px 10px;
  margin-bottom: 24px;
  letter-spacing: 0.03em;
}

.hero-left h1 {
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
  color: var(--fg);
}

.lede {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 40px;
  max-width: 420px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
}

.stat-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
  font-family: 'JetBrains Mono', monospace;
}

.stat-label {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.stat-sep {
  width: 1px;
  height: 28px;
  background: var(--border);
}

/* Prompt Editor Mockup */
.hero-right {
  position: relative;
}

.prompt-editor {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 24px 48px rgba(0,0,0,0.4), 0 0 0 1px rgba(0,212,255,0.05);
}

.editor-bar {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 16px;
  background: #1c2128;
}

.editor-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

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

.editor-tabs {
  display: flex;
  gap: 12px;
}

.tab {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--muted);
  padding: 4px 8px;
  border-radius: 4px;
}

.tab.active {
  color: var(--fg);
  background: var(--surface);
}

.tab-ver {
  color: var(--accent);
  font-size: 10px;
  margin-left: 4px;
}

.editor-diff {
  padding: 20px 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.7;
}

.diff-line {
  padding: 2px 8px;
  border-radius: 3px;
}

.diff-line.removed {
  color: var(--red);
  background: rgba(255, 123, 114, 0.08);
}

.diff-line.added {
  color: var(--green);
  background: rgba(63, 185, 80, 0.08);
}

.diff-line.unchanged {
  color: var(--muted);
}

.editor-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.diff-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--muted);
}

.run-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  padding: 5px 12px;
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: 5px;
  background: var(--accent-dim);
  cursor: default;
}

/* Section label */
.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

/* Capabilities */
.capabilities {
  padding: 100px 24px;
  border-bottom: 1px solid var(--border);
}

.cap-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.cap-header {
  margin-bottom: 60px;
}

.cap-header h2 {
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  max-width: 480px;
}

.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.cap-card {
  padding: 32px 28px;
  background: var(--bg);
}

.cap-icon {
  margin-bottom: 16px;
  opacity: 0.9;
}

.cap-card h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.cap-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

/* Playbook */
.playbook {
  padding: 100px 24px;
  border-bottom: 1px solid var(--border);
}

.playbook-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.playbook-left h2 {
  font-size: clamp(26px, 2.5vw, 34px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.playbook-desc {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 48px;
}

.workflow-steps {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.wf-step {
  display: flex;
  gap: 20px;
}

.wf-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
  padding-top: 2px;
  flex-shrink: 0;
}

.wf-body h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.wf-body p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

/* Commit history */
.commit-history {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-top: 48px;
}

.ch-header {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.ch-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.ch-item:last-child {
  border-bottom: none;
}

.ch-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  margin-top: 5px;
  flex-shrink: 0;
}

.ch-dot.current {
  background: var(--accent);
  box-shadow: 0 0 8px rgba(0,212,255,0.4);
}

.ch-title {
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 2px;
  font-family: 'JetBrains Mono', monospace;
}

.ch-tag {
  color: var(--accent);
  font-size: 11px;
}

.ch-meta {
  font-size: 11px;
  color: var(--muted);
}

/* Outcomes */
.outcomes {
  padding: 80px 24px;
  border-bottom: 1px solid var(--border);
}

.outcomes-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.outcomes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 40px;
}

.outcome {
  text-align: center;
}

.outcome-num {
  font-size: clamp(48px, 5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.05em;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 12px;
}

.outcome-label {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
}

.outcomes-note {
  text-align: center;
  font-size: 14px;
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto;
}

/* Closing */
.closing {
  padding: 100px 24px;
  text-align: center;
}

.closing-inner {
  max-width: 640px;
  margin: 0 auto;
}

.closing h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 20px;
}

.closing p {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-wordmark {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 13px;
  margin-bottom: 4px;
}

.footer-left p {
  font-size: 12px;
  color: var(--muted);
}

.footer-right {
  font-size: 12px;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-inner,
  .playbook-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-right {
    order: -1;
  }

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

  .outcomes-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .stat-sep {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 60px 20px 80px;
  }

  .capabilities, .playbook, .outcomes, .closing {
    padding: 60px 20px;
  }
}