:root {
  --bg-primary: #0a0f1a;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #8b5cf6;
  --accent-dark: #7c3aed;
  --accent-glow: rgba(139, 92, 246, 0.3);
  --border: #374151;
  --success: #10b981;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--text-primary); }

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 15, 26, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  padding: 0 1.5rem;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-logo svg { width: 32px; height: 32px; }

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a { color: var(--text-secondary); font-size: 0.9rem; }
.nav-links a:hover { color: var(--text-primary); }

.nav-cta {
  background: var(--accent);
  color: var(--text-primary) !important;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  transition: background 0.2s;
}

.nav-cta:hover { background: var(--accent-dark); }

.mobile-menu-toggle { display: none; }
.mobile-menu-button {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
}

/* Hero */
.hero {
  padding: 8rem 1.5rem 4rem;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

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

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--accent) 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
  transform: translateY(-2px);
}

/* Email demo */
.email-demo {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  max-width: 500px;
  margin: 0 auto;
  overflow: hidden;
}

.email-header {
  background: var(--bg-tertiary);
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

.email-address {
  font-family: monospace;
  color: var(--accent);
  font-size: 1.1rem;
}

.email-body {
  padding: 1rem;
}

.email-item {
  display: flex;
  gap: 1rem;
  padding: 0.75rem;
  border-radius: 8px;
  margin-bottom: 0.5rem;
  background: var(--bg-primary);
}

.email-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-glow);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

.email-content { flex: 1; }

.email-from {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.9rem;
}

.email-subject {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.email-time {
  color: var(--text-muted);
  font-size: 0.75rem;
}

/* Sections */
section { padding: 5rem 1.5rem; }

.section-container { max-width: 1200px; margin: 0 auto; }

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-size: 2rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Problem section */
.problem { background: var(--bg-secondary); }

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.problem-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

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

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-glow);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--accent);
}

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

/* How it works */
.how-it-works { background: var(--bg-secondary); }

.how-it-works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

.step {
  text-align: center;
  padding: 1rem;
}

.step-number {
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: var(--text-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  margin: 0 auto 1rem;
}

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

/* Pricing */
.pricing { background: var(--bg-secondary); }

.pricing-card {
  max-width: 400px;
  margin: 0 auto;
  background: var(--bg-primary);
  border: 2px solid var(--accent);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
}

.pricing-card h3 {
  color: var(--text-primary);
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent);
  margin: 1rem 0;
}

.pricing-price span {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin: 1.5rem 0;
}

.pricing-features li {
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pricing-features li::before {
  content: "✓";
  color: var(--success);
  font-weight: 700;
}

/* For Agents */
.for-agents {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  border-top: 1px solid var(--accent);
}

.agent-endpoints {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.endpoint {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.endpoint h4 {
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.endpoint code {
  display: block;
  font-family: 'SF Mono', Monaco, monospace;
  font-size: 0.85rem;
  color: var(--text-primary);
  word-break: break-all;
}

.code-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-top: 2rem;
}

.code-block pre {
  font-family: 'SF Mono', Monaco, monospace;
  font-size: 0.85rem;
  color: var(--text-primary);
  overflow-x: auto;
}

/* Ecosystem */
.ecosystem {
  background: var(--bg-secondary);
  text-align: center;
}

.ecosystem-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  padding: 1rem 1.5rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

/* Footer */
footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  padding: 3rem 1.5rem 2rem;
}

.footer-container { max-width: 1200px; margin: 0 auto; }

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-section a {
  display: block;
  color: var(--text-secondary);
  padding: 0.25rem 0;
  font-size: 0.9rem;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10, 15, 26, 0.97);
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
  }
  .mobile-menu-toggle:checked ~ .nav-links { display: flex; }
  .mobile-menu-button { display: block; }
  .hero { padding: 6rem 1rem 3rem; }
  section { padding: 3rem 1rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* Agent Quick Start */
.agent-quick-start-section {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  border-bottom: 1px solid var(--accent);
}

.agent-quick-start-section .section-container {
  max-width: 800px;
}

.agent-quick-start-section ol {
  list-style: none;
  counter-reset: quickstart-step-counter;
  text-align: left;
}

.agent-quick-start-section ol > li {
  counter-increment: quickstart-step-counter;
  margin-bottom: 1.5rem;
  padding: 1rem 1.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.agent-quick-start-section ol > li::before {
  content: counter(quickstart-step-counter) ". ";
  color: var(--accent);
  font-weight: 700;
}

.agent-quick-start-section pre {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  margin-top: 0.5rem;
  overflow-x: auto;
}

.agent-quick-start-section code {
  font-family: 'SF Mono', Monaco, monospace;
  font-size: 0.85rem;
  color: var(--text-primary);
}

.agent-quick-start-section p code {
  background: var(--bg-tertiary);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}