:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-900: #111827;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--gray-900);
  line-height: 1.6;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Nav */
.nav {
  padding: 16px 24px;
  border-bottom: 1px solid var(--gray-200);
}
.nav-container {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-900);
  text-decoration: none;
}
.logo span {
  color: var(--primary);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav-links a {
  color: var(--gray-600);
  text-decoration: none;
  font-size: 14px;
}
.nav-links a:hover {
  color: var(--gray-900);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover {
  background: var(--primary-dark);
}
.btn-google {
  background: white;
  color: var(--gray-700);
  border: 1px solid var(--gray-200);
  padding: 12px 24px;
  font-size: 15px;
}
.btn-google:hover {
  background: var(--gray-50);
}

/* Hero */
.hero {
  padding: 80px 24px;
  text-align: center;
}
.hero h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 16px;
}
.hero-subtitle {
  font-size: 18px;
  color: var(--gray-600);
  max-width: 500px;
  margin: 0 auto 32px;
}
.hero-stats {
  margin-top: 32px;
  color: var(--gray-500);
  font-size: 13px;
}

/* Features */
.features {
  padding: 80px 24px;
  background: var(--gray-50);
}
.features h2 {
  text-align: center;
  font-size: 28px;
  margin-bottom: 48px;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.feature-card {
  background: white;
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.feature-icon {
  font-size: 32px;
  margin-bottom: 12px;
}
.feature-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}
.feature-card p {
  color: var(--gray-600);
  font-size: 14px;
}

/* API Example */
.api-example {
  padding: 80px 24px;
}
.api-example h2 {
  text-align: center;
  font-size: 28px;
  margin-bottom: 48px;
}
.code-block {
  background: #1e1e1e;
  border-radius: 12px;
  padding: 20px;
  color: #d4d4d4;
  overflow-x: auto;
  margin-bottom: 16px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.code-comment {
  color: #6a9955;
  margin-bottom: 8px;
}
.code-block code, .code-block pre {
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 13px;
  margin: 0;
}

/* Footer */
.footer {
  padding: 48px 24px;
  text-align: center;
  color: var(--gray-500);
  font-size: 13px;
}

/* Responsive */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 32px;
  }
  .nav-links a:not(.btn) {
    display: none;
  }
}