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

:root {
  --primary-blue: #2563eb;
  --primary-dark: #1e40af;
  --text-dark: #1f2937;
  --text-light: #6b7280;
  --border-light: #e5e7eb;
  --bg-light: #f9fafb;
  --white: #ffffff;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--white);
}

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

a:hover {
  color: var(--primary-dark);
}

/* Navigation */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-light);
  background: var(--white);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo img {
  width: 32px;
  height: 32px;
}

nav a {
  color: var(--text-light);
  font-size: 0.95rem;
}

nav a:hover {
  color: var(--primary-blue);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Hero Section */
.hero {
  padding: 6rem 2rem;
  text-align: center;
  background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text-dark);
  line-height: 1.2;
}

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

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

.btn {
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 0.375rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-block;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
}

.btn-secondary {
  background: var(--white);
  color: var(--primary-blue);
  border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
  background: var(--bg-light);
}

/* Features Section */
.features {
  padding: 4rem 2rem;
  background: var(--white);
}

.features h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 3rem;
}

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

.feature-card {
  padding: 2rem;
  background: var(--bg-light);
  border-radius: 0.5rem;
  border: 1px solid var(--border-light);
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--text-dark);
}

.feature-card p {
  color: var(--text-light);
  line-height: 1.7;
}

/* Signup Section */
.signup {
  padding: 4rem 2rem;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-dark) 100%);
  color: var(--white);
  text-align: center;
}

.signup h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.signup p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.form-group {
  max-width: 400px;
  margin: 0 auto;
}

.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 0.375rem;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.form-group button {
  width: 100%;
}

.form-group button:hover {
  background: #1e40af;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.form-note {
  font-size: 0.85rem;
  margin-top: 1rem;
  opacity: 0.8;
}

/* Footer */
footer {
  padding: 2rem;
  background: var(--bg-light);
  border-top: 1px solid var(--border-light);
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
}

footer a {
  color: var(--primary-blue);
}

footer nav {
  padding: 1rem 0;
  border: none;
  background: none;
  justify-content: center;
  gap: 2rem;
  border-bottom: none;
  position: static;
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

footer nav a {
  color: var(--text-light);
}

/* Privacy Policy */
.policy-header {
  padding: 3rem 2rem;
  background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
  border-bottom: 1px solid var(--border-light);
}

.policy-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.policy-header p {
  color: var(--text-light);
  font-size: 1rem;
}

.policy-content {
  padding: 4rem 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.policy-content h2 {
  font-size: 1.5rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.policy-content h3 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-dark);
}

.policy-content p {
  margin-bottom: 1rem;
  color: var(--text-light);
  line-height: 1.8;
}

.policy-content ul,
.policy-content ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-light);
}

.policy-content li {
  margin-bottom: 0.5rem;
}

.policy-content code {
  background: var(--bg-light);
  padding: 0.2rem 0.5rem;
  border-radius: 0.25rem;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  nav {
    padding: 1rem 1.5rem;
  }

  .hero {
    padding: 3rem 1.5rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .features {
    padding: 2rem 1.5rem;
  }

  .features h2 {
    font-size: 1.5rem;
  }

  .signup {
    padding: 3rem 1.5rem;
  }

  .signup h2 {
    font-size: 1.5rem;
  }

  .policy-content {
    padding: 2rem 1.5rem;
  }

  .policy-header h1 {
    font-size: 1.75rem;
  }

  footer nav {
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .container {
    padding: 0 1rem;
  }
}