/* IGVE Brake - Stylesheet */

:root {
  --primary-color: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #60a5fa;
  --accent-teal: #0891b2;
  --accent-teal-dark: #0e7490;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-light: #94a3b8;
  --bg-primary: #0a0f1a;
  --bg-secondary: #0f172a;
  --bg-accent: #1e293b;
  --border-color: #334155;
  --success-color: #34d399;
  --warning-color: #fbbf24;
  --danger-color: #f87171;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --max-width: 1000px;
}

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

body {
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

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

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

/* Header */
.site-header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.home-mark img {
  border-radius: 50%;
  display: block;
}

.brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.brand-name {
  font-weight: 700;
  color: var(--accent-teal);
  font-size: 1.1rem;
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--text-light);
}

.btn-nav-cta {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: white;
  background: #16a34a;
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: background 0.2s;
}
.btn-nav-cta:hover {
  background: #15803d;
  text-decoration: none;
}

/* Hero */
.hero {
  text-align: center;
  padding: var(--spacing-lg) 0 var(--spacing-md);
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero h1 {
  font-size: 2.25rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.teaching-context {
  max-width: 36rem;
  margin: 0.75rem auto 1rem;
  padding: 0.85rem 1.1rem;
  background: var(--bg-accent);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.95rem;
  line-height: 1.55;
  text-align: left;
  color: var(--text-secondary);
}

.teaching-context p + p {
  margin-top: 0.5rem;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

.date-badge {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
}

/* Intro Section */
.intro-section {
  padding: var(--spacing-md) 0;
}

.intro-text {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.intro-text strong {
  color: var(--text-primary);
}

/* Demo Section */
.demo-section {
  padding: var(--spacing-md) 0 var(--spacing-lg);
}

.scenario-picker {
  margin-bottom: 1rem;
}

.scenario-picker label {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.scenario-picker select {
  width: 100%;
  max-width: 640px;
  display: block;
  padding: 0.75rem 2.5rem 0.75rem 1rem;
  font-size: 1.05rem;
  font-family: var(--font-primary);
  font-weight: 600;
  background: var(--bg-accent);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
}

.scenario-picker select:hover {
  border-color: var(--accent-teal);
}

.scenario-picker select:focus {
  outline: none;
  border-color: var(--accent-teal);
  box-shadow: 0 0 0 2px rgba(8, 145, 178, 0.2);
}

.script-note {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-light);
}

.incident-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
}

.incident-card h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-light);
  margin-bottom: 0.4rem;
  font-weight: 600;
}

.incident-card p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.6;
  margin: 0;
}

.run-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.25rem 0 1.5rem;
  padding: 0.6rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: white;
  background: var(--accent-teal);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background 0.2s;
}

.run-btn:hover:not(:disabled) {
  background: var(--accent-teal-dark);
}

.run-btn:disabled {
  opacity: 0.65;
  cursor: wait;
}

/* Toggle Controls */
.toggle-controls {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: var(--spacing-md);
}

.toggle-btn {
  padding: 0.5rem 1.25rem;
  font-size: 0.9rem;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.2s;
}

.toggle-btn:hover {
  border-color: var(--primary-light);
  color: var(--text-primary);
}

.toggle-btn.active {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

/* Comparison Grid */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.comparison-grid.view-slot .path-igve,
.comparison-grid.view-igve .path-slot {
  display: none;
}

.comparison-grid.view-slot,
.comparison-grid.view-igve {
  grid-template-columns: 1fr;
}

.path-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.path-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  background: var(--bg-accent);
  border-bottom: 1px solid var(--border-color);
}

.path-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
}

.badge-slot {
  background: rgba(251, 191, 36, 0.15);
  color: var(--warning-color);
}

.badge-igve {
  background: rgba(52, 211, 153, 0.15);
  color: var(--success-color);
}

.path-timing {
  font-size: 0.8rem;
  color: var(--text-light);
}

.path-content {
  padding: 1.25rem;
  min-height: 300px;
}

/* Slot Machine Output */
.slot-output {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  white-space: pre-wrap;
}

.slot-token {
  opacity: 0;
  animation: fadeIn 0.08s forwards;
}

.slot-cursor {
  display: inline-block;
  color: var(--warning-color);
  animation: blink 0.8s step-end infinite;
  margin-left: 1px;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

@keyframes blink {
  50% { opacity: 0; }
}

.slot-note {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.25);
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  color: var(--text-light);
}

.slot-note strong {
  color: var(--warning-color);
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.25rem;
}

/* IGVE Stops */
.igve-stops {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.stop-block {
  background: var(--bg-accent);
  border-radius: var(--border-radius);
  padding: 1rem;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s, transform 0.3s;
}

.stop-block.visible {
  opacity: 1;
  transform: translateY(0);
}

.stop-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.stop-type {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.stop-icon {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.icon-intention {
  background: rgba(59, 130, 246, 0.2);
  color: var(--primary-light);
}

.icon-governance {
  background: rgba(168, 85, 247, 0.2);
  color: #c084fc;
}

.icon-verification {
  background: rgba(8, 145, 178, 0.2);
  color: #22d3ee;
}

.icon-evidence {
  background: rgba(52, 211, 153, 0.2);
  color: var(--success-color);
}

.stop-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.stop-question {
  font-size: 0.85rem;
  color: var(--text-light);
  font-style: italic;
  text-align: right;
}

.stop-body {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.rule-list,
.check-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin: 0;
}

.rule-list li,
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.rule-mark {
  color: var(--primary-light);
  font-weight: 700;
  flex-shrink: 0;
}

.check-mark {
  font-weight: 700;
  flex-shrink: 0;
  width: 1.1rem;
}

.check-list li.pass .check-mark {
  color: var(--success-color);
}

.check-list li.fail .check-mark {
  color: var(--danger-color);
}

.evidence-meta {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--text-light);
  font-family: var(--font-mono);
}

.evidence-meta span strong {
  color: var(--text-secondary);
  font-weight: 600;
  font-family: var(--font-primary);
}

/* Routing / release */
.routing-block {
  margin-top: 0.25rem;
  padding: 1rem;
  border-radius: var(--border-radius);
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.3s, transform 0.3s;
}

.routing-block.visible {
  opacity: 1;
  transform: scale(1);
}

.routing-block.release {
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.3);
}

.routing-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
  color: var(--success-color);
}

.routing-action {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.routing-reason {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 0.25rem;
}

.released-draft {
  margin-top: 0.85rem;
  padding: 0.85rem 1rem;
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  color: var(--text-secondary);
  white-space: pre-wrap;
  line-height: 1.65;
}

/* Takeaway Section */
.takeaway-section {
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--border-color);
}

.takeaway-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-teal);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  max-width: 720px;
  margin: 0 auto;
}

.takeaway-card h3 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.takeaway-card p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.takeaway-card p:last-child {
  margin-bottom: 0;
}

.takeaway-card strong {
  color: var(--text-primary);
}

/* Footer */
.site-footer {
  background: #020617;
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.footer-row p {
  margin: 0;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
}

.footer-row a {
  color: rgba(255,255,255,0.8);
}
.footer-row a:hover {
  color: white;
}

.footer-credit {
  margin-top: var(--spacing-sm);
  padding-top: var(--spacing-sm);
  border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-credit p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-light);
}

.footer-credit a {
  color: var(--primary-light);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 1.75rem;
  }

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

  .toggle-controls {
    flex-wrap: wrap;
  }

  .stop-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .stop-question {
    text-align: left;
  }

  .footer-row {
    flex-direction: column;
    text-align: center;
  }

  .container {
    padding: 0 1rem;
  }
}