:root {
  --primary: #FACC15;
  --primary-hover: #EAB308;
  --secondary: #0EA5E9;
  --accent: #10B981;
  --background: #F8FAFC;
  --surface: #FFFFFF;
  --foreground: #0F172A;
  --muted: #64748B;
  --border: #E2E8F0;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--background);
  color: var(--foreground);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

nav {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

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

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--foreground);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--primary);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon svg {
  width: 20px;
  height: 20px;
  color: var(--foreground);
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

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

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

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

.btn-secondary:hover {
  background: #0284C7;
}

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

.btn-outline:hover {
  background: var(--surface);
  border-color: var(--secondary);
  color: var(--secondary);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
}

.hero {
  padding: 100px 0;
  text-align: center;
  background: var(--surface);
}

.hero h1 {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero .highlight {
  color: var(--secondary);
}

.hero p {
  font-size: 20px;
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto 40px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 18px;
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  transition: all 0.2s;
}

.tool-card:hover {
  border-color: var(--secondary);
}

.tool-card.available {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08) 0%, transparent 100%);
}

.tool-icon {
  width: 48px;
  height: 48px;
  background: rgba(14, 165, 233, 0.1);
  border-radius: 10px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tool-icon svg {
  width: 24px;
  height: 24px;
  color: var(--secondary);
}

.tool-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.tool-card p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 16px;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
}

.badge-available {
  background: var(--accent);
  color: white;
}

.badge-soon {
  background: var(--border);
  color: var(--muted);
}

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

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--muted);
  font-size: 14px;
}

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

.step {
  text-align: center;
}

.step-number {
  width: 48px;
  height: 48px;
  background: var(--secondary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin: 0 auto 20px;
}

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

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

.use-cases {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.use-case {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
}

.use-case-icon {
  width: 64px;
  height: 64px;
  background: rgba(14, 165, 233, 0.1);
  border-radius: 50%;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--secondary);
}

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

.use-case p {
  color: var(--muted);
  font-size: 14px;
}

.powered-by {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 14px;
  color: var(--muted);
}

.powered-by .whistle-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--primary);
  color: var(--foreground);
  padding: 4px 10px;
  border-radius: 100px;
  font-weight: 600;
}

.cta-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 80px 0;
  text-align: center;
}

.cta-section h2 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 18px;
  color: var(--muted);
  margin-bottom: 32px;
}

footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--foreground);
}

.footer-brand svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

.footer-links a:hover {
  color: var(--secondary);
}

.footer-copyright {
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
  }
  
  .hero p {
    font-size: 16px;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .tools-grid,
  .features-grid,
  .steps,
  .use-cases {
    grid-template-columns: 1fr;
  }
  
  .nav-links {
    display: none;
  }
  
  .section-header h2 {
    font-size: 28px;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}