/* A2UI Demo - Main Styles */

:root {
  --primary-color: #1976D2;
  --primary-dark: #1565C0;
  --secondary-color: #424242;
  --background: #fafafa;
  --surface: #ffffff;
  --text-primary: #212121;
  --text-secondary: #757575;
  --border-color: #e0e0e0;
  --success: #4CAF50;
  --warning: #FF9800;
  --error: #F44336;
  --code-bg: #263238;
  --code-text: #ECEFF1;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
  --radius: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
}

/* Navbar */
.navbar {
  background: var(--surface);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo {
  font-size: 1.5rem;
}

.brand-text {
  font-size: 1.25rem;
  font-weight: 600;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-color);
  background: rgba(25, 118, 210, 0.1);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  padding: 4rem 2rem;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.tagline {
  font-size: 1.5rem;
  opacity: 0.9;
  margin-bottom: 1rem;
}

.description {
  font-size: 1.1rem;
  opacity: 0.85;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--surface);
  color: var(--primary-color);
}

.btn-primary:hover {
  background: #f5f5f5;
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.5);
}

.btn-secondary:hover {
  border-color: white;
  background: rgba(255,255,255,0.1);
}

/* Main Content */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

section {
  margin-bottom: 4rem;
}

section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

/* Features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--surface);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.feature-card p {
  color: var(--text-secondary);
}

/* Protocol Flow */
.protocol-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.flow-step {
  background: var(--surface);
  padding: 1.5rem 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
  min-width: 200px;
}

.step-number {
  width: 32px;
  height: 32px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.75rem;
  font-weight: bold;
}

.step-content h4 {
  color: var(--primary-color);
  margin-bottom: 0.25rem;
}

.step-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.flow-arrow {
  font-size: 1.5rem;
  color: var(--text-secondary);
}

/* Code Example */
.code-example {
  background: var(--code-bg);
  border-radius: var(--radius);
  padding: 1.5rem;
  overflow-x: auto;
}

.code-example code {
  color: var(--code-text);
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.9rem;
  white-space: pre;
}

/* Canvas Page */
.canvas-page {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

.canvas-header {
  text-align: center;
  margin-bottom: 2rem;
}

.canvas-header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.canvas-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.input-panel,
.output-panel {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.input-panel h3,
.output-panel h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

#jsonl-input {
  width: 100%;
  height: 300px;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.85rem;
  resize: vertical;
}

.input-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.example-select {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--surface);
}

.canvas-output {
  min-height: 300px;
  border: 1px dashed var(--border-color);
  border-radius: var(--radius);
  padding: 1rem;
  background: var(--background);
}

.placeholder {
  color: var(--text-secondary);
  text-align: center;
  padding: 2rem;
}

/* Examples Section */
.examples-section {
  background: var(--surface);
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.examples-section h3 {
  margin-bottom: 1rem;
}

.example-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.example-card {
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
}

.example-card:hover {
  border-color: var(--primary-color);
  background: rgba(25, 118, 210, 0.05);
}

.example-card h4 {
  margin-bottom: 0.25rem;
}

.example-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Footer */
.footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  margin-top: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 1rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .canvas-container {
    grid-template-columns: 1fr;
  }
  
  .protocol-flow {
    flex-direction: column;
  }
  
  .flow-arrow {
    transform: rotate(90deg);
  }
}