/* static/css/style.css */
:root {
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a3e;
  --bg-accent: #2d1b69;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #a78bfa;
  --accent-bright: #c4b5fd;
  --btn-primary: #6d28d9;
  --btn-primary-hover: #7c3aed;
  --btn-outline-border: #4c3d8f;
  --card-bg: rgba(30, 27, 75, 0.5);
  --card-border: rgba(139, 92, 246, 0.15);
  --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

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

body {
  font-family: var(--font-stack);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

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

a:hover {
  color: var(--accent-bright);
}

/* Layout */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.nav {
  padding: 20px 0;
  border-bottom: 1px solid var(--card-border);
}

.nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.nav-links a {
  color: var(--text-secondary);
  margin-left: 24px;
  font-size: 14px;
}

.nav-links a:hover {
  color: var(--text-primary);
}

/* Hero */
.hero {
  text-align: center;
  padding: 100px 0 80px;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 16px;
}

.hero .agent-hint {
  display: inline-block;
  font-size: 14px;
  color: var(--accent);
  border: 1px solid var(--btn-outline-border);
  border-radius: 20px;
  padding: 6px 16px;
  margin-bottom: 36px;
}

.hero .agent-hint:hover {
  background: rgba(109, 40, 217, 0.15);
}

.cta-group {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

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

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

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

.btn-outline:hover {
  background: rgba(109, 40, 217, 0.15);
  color: var(--accent-bright);
}

/* Features */
.features {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

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

.feature-card:hover {
  border-color: rgba(139, 92, 246, 0.35);
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* How It Works */
.how-it-works {
  padding: 80px 0;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.step {
  text-align: center;
  padding: 32px 20px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--btn-primary);
  color: white;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
}

.step h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step p {
  font-size: 14px;
  color: var(--text-secondary);
}

.step code {
  font-size: 12px;
  background: rgba(109, 40, 217, 0.2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent);
}

/* Footer */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--card-border);
  text-align: center;
}

.footer p {
  font-size: 13px;
  color: var(--text-muted);
}

.footer .api-url {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
}

.footer code {
  font-size: 12px;
  background: rgba(109, 40, 217, 0.15);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 32px;
  }

  .hero .subtitle {
    font-size: 16px;
  }

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

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

  .nav-links {
    display: none;
  }
}